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76#define __U_BOOT__
77#ifdef __U_BOOT__
78#include <common.h>
79#include <env.h>
80#include <malloc.h>
81#include <linux/ctype.h>
82#include <console.h>
83#include <bootretry.h>
84#include <cli.h>
85#include <cli_hush.h>
86#include <command.h>
87#include <asm/global_data.h>
88#endif
89#ifndef __U_BOOT__
90#include <ctype.h>
91#include <unistd.h>
92#include <stdlib.h>
93#include <string.h>
94#include <stdio.h>
95#include <glob.h>
96#include <stdarg.h>
97#include <errno.h>
98#include <fcntl.h>
99#include <getopt.h>
100
101#include <sys/stat.h>
102#include <sys/types.h>
103#include <sys/wait.h>
104#include <signal.h>
105
106
107
108#if 1
109#include "busybox.h"
110#include "cmdedit.h"
111#else
112#define applet_name "hush"
113#include "standalone.h"
114#define hush_main main
115#undef CONFIG_FEATURE_SH_FANCY_PROMPT
116#define BB_BANNER
117#endif
118#endif
119#define SPECIAL_VAR_SYMBOL 03
120#define SUBSTED_VAR_SYMBOL 04
121#ifndef __U_BOOT__
122#define FLAG_EXIT_FROM_LOOP 1
123#define FLAG_PARSE_SEMICOLON (1 << 1)
124#define FLAG_REPARSING (1 << 2)
125
126#endif
127
128#ifdef __U_BOOT__
129DECLARE_GLOBAL_DATA_PTR;
130
131#define EXIT_SUCCESS 0
132#define EOF -1
133#define syntax() syntax_err()
134#define xstrdup strdup
135#define error_msg printf
136#else
137typedef enum {
138 REDIRECT_INPUT = 1,
139 REDIRECT_OVERWRITE = 2,
140 REDIRECT_APPEND = 3,
141 REDIRECT_HEREIS = 4,
142 REDIRECT_IO = 5
143} redir_type;
144
145
146
147struct {int mode; int default_fd; char *descrip;} redir_table[] = {
148 { 0, 0, "()" },
149 { O_RDONLY, 0, "<" },
150 { O_CREAT|O_TRUNC|O_WRONLY, 1, ">" },
151 { O_CREAT|O_APPEND|O_WRONLY, 1, ">>" },
152 { O_RDONLY, -1, "<<" },
153 { O_RDWR, 1, "<>" }
154};
155#endif
156
157typedef enum {
158 PIPE_SEQ = 1,
159 PIPE_AND = 2,
160 PIPE_OR = 3,
161 PIPE_BG = 4,
162} pipe_style;
163
164
165typedef enum {
166 RES_NONE = 0,
167 RES_IF = 1,
168 RES_THEN = 2,
169 RES_ELIF = 3,
170 RES_ELSE = 4,
171 RES_FI = 5,
172 RES_FOR = 6,
173 RES_WHILE = 7,
174 RES_UNTIL = 8,
175 RES_DO = 9,
176 RES_DONE = 10,
177 RES_XXXX = 11,
178 RES_IN = 12,
179 RES_SNTX = 13
180} reserved_style;
181#define FLAG_END (1<<RES_NONE)
182#define FLAG_IF (1<<RES_IF)
183#define FLAG_THEN (1<<RES_THEN)
184#define FLAG_ELIF (1<<RES_ELIF)
185#define FLAG_ELSE (1<<RES_ELSE)
186#define FLAG_FI (1<<RES_FI)
187#define FLAG_FOR (1<<RES_FOR)
188#define FLAG_WHILE (1<<RES_WHILE)
189#define FLAG_UNTIL (1<<RES_UNTIL)
190#define FLAG_DO (1<<RES_DO)
191#define FLAG_DONE (1<<RES_DONE)
192#define FLAG_IN (1<<RES_IN)
193#define FLAG_START (1<<RES_XXXX)
194
195
196struct p_context {
197 struct child_prog *child;
198 struct pipe *list_head;
199 struct pipe *pipe;
200#ifndef __U_BOOT__
201 struct redir_struct *pending_redirect;
202#endif
203 reserved_style w;
204 int old_flag;
205 struct p_context *stack;
206 int type;
207
208};
209
210#ifndef __U_BOOT__
211struct redir_struct {
212 redir_type type;
213 int fd;
214 int dup;
215 struct redir_struct *next;
216 glob_t word;
217};
218#endif
219
220struct child_prog {
221#ifndef __U_BOOT__
222 pid_t pid;
223#endif
224 char **argv;
225
226 int *argv_nonnull;
227#ifdef __U_BOOT__
228 int argc;
229#endif
230 struct pipe *group;
231#ifndef __U_BOOT__
232 int subshell;
233 struct redir_struct *redirects;
234 glob_t glob_result;
235 int is_stopped;
236 struct pipe *family;
237#endif
238 int sp;
239 int type;
240};
241
242struct pipe {
243#ifndef __U_BOOT__
244 int jobid;
245#endif
246 int num_progs;
247#ifndef __U_BOOT__
248 int running_progs;
249 char *text;
250 char *cmdbuf;
251 pid_t pgrp;
252#endif
253 struct child_prog *progs;
254 struct pipe *next;
255#ifndef __U_BOOT__
256 int stopped_progs;
257 int job_context;
258#endif
259 pipe_style followup;
260 reserved_style r_mode;
261};
262
263#ifndef __U_BOOT__
264struct close_me {
265 int fd;
266 struct close_me *next;
267};
268#endif
269
270struct variables {
271 char *name;
272 char *value;
273 int flg_export;
274 int flg_read_only;
275 struct variables *next;
276};
277
278
279
280#ifndef __U_BOOT__
281char **global_argv;
282unsigned int global_argc;
283#endif
284static unsigned int last_return_code;
285#ifndef __U_BOOT__
286extern char **environ;
287#endif
288
289
290static uchar *ifs;
291static char map[256];
292#ifndef __U_BOOT__
293static int fake_mode;
294static int interactive;
295static struct close_me *close_me_head;
296static const char *cwd;
297static struct pipe *job_list;
298static unsigned int last_bg_pid;
299static unsigned int last_jobid;
300static unsigned int shell_terminal;
301static char *PS1;
302static char *PS2;
303struct variables shell_ver = { "HUSH_VERSION", "0.01", 1, 1, 0 };
304struct variables *top_vars = &shell_ver;
305#else
306static int flag_repeat = 0;
307static int do_repeat = 0;
308static struct variables *top_vars = NULL ;
309#endif
310
311#define B_CHUNK (100)
312#define B_NOSPAC 1
313
314typedef struct {
315 char *data;
316 int length;
317 int maxlen;
318 int quote;
319 int nonnull;
320} o_string;
321#define NULL_O_STRING {NULL,0,0,0,0}
322
323
324
325
326
327struct in_str {
328 const char *p;
329#ifndef __U_BOOT__
330 char peek_buf[2];
331#endif
332 int __promptme;
333 int promptmode;
334#ifndef __U_BOOT__
335 FILE *file;
336#endif
337 int (*get) (struct in_str *);
338 int (*peek) (struct in_str *);
339};
340#define b_getch(input) ((input)->get(input))
341#define b_peek(input) ((input)->peek(input))
342
343#ifndef __U_BOOT__
344#define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n"
345
346struct built_in_command {
347 char *cmd;
348 char *descr;
349 int (*function) (struct child_prog *);
350};
351#endif
352
353
354#if 0
355#define DEBUG_SHELL
356#endif
357
358
359#ifdef DEBUG_SHELL
360#ifndef __U_BOOT__
361static void debug_printf(const char *format, ...)
362{
363 va_list args;
364 va_start(args, format);
365 vfprintf(stderr, format, args);
366 va_end(args);
367}
368#else
369#define debug_printf(fmt,args...) printf (fmt ,##args)
370#endif
371#else
372static inline void debug_printf(const char *format, ...) { }
373#endif
374#define final_printf debug_printf
375
376#ifdef __U_BOOT__
377static void syntax_err(void) {
378 printf("syntax error\n");
379}
380#else
381static void __syntax(char *file, int line) {
382 error_msg("syntax error %s:%d", file, line);
383}
384#define syntax() __syntax(__FILE__, __LINE__)
385#endif
386
387#ifdef __U_BOOT__
388static void *xmalloc(size_t size);
389static void *xrealloc(void *ptr, size_t size);
390#else
391
392
393static int builtin_cd(struct child_prog *child);
394static int builtin_env(struct child_prog *child);
395static int builtin_eval(struct child_prog *child);
396static int builtin_exec(struct child_prog *child);
397static int builtin_exit(struct child_prog *child);
398static int builtin_export(struct child_prog *child);
399static int builtin_fg_bg(struct child_prog *child);
400static int builtin_help(struct child_prog *child);
401static int builtin_jobs(struct child_prog *child);
402static int builtin_pwd(struct child_prog *child);
403static int builtin_read(struct child_prog *child);
404static int builtin_set(struct child_prog *child);
405static int builtin_shift(struct child_prog *child);
406static int builtin_source(struct child_prog *child);
407static int builtin_umask(struct child_prog *child);
408static int builtin_unset(struct child_prog *child);
409static int builtin_not_written(struct child_prog *child);
410#endif
411
412static int b_check_space(o_string *o, int len);
413static int b_addchr(o_string *o, int ch);
414static void b_reset(o_string *o);
415static int b_addqchr(o_string *o, int ch, int quote);
416#ifndef __U_BOOT__
417static int b_adduint(o_string *o, unsigned int i);
418#endif
419
420static int static_get(struct in_str *i);
421static int static_peek(struct in_str *i);
422static int file_get(struct in_str *i);
423static int file_peek(struct in_str *i);
424#ifndef __U_BOOT__
425static void setup_file_in_str(struct in_str *i, FILE *f);
426#else
427static void setup_file_in_str(struct in_str *i);
428#endif
429static void setup_string_in_str(struct in_str *i, const char *s);
430#ifndef __U_BOOT__
431
432static void mark_open(int fd);
433static void mark_closed(int fd);
434static void close_all(void);
435#endif
436
437static char *indenter(int i);
438static int free_pipe_list(struct pipe *head, int indent);
439static int free_pipe(struct pipe *pi, int indent);
440
441#ifndef __U_BOOT__
442static int setup_redirects(struct child_prog *prog, int squirrel[]);
443#endif
444static int run_list_real(struct pipe *pi);
445#ifndef __U_BOOT__
446static void pseudo_exec(struct child_prog *child) __attribute__ ((noreturn));
447#endif
448static int run_pipe_real(struct pipe *pi);
449
450#ifndef __U_BOOT__
451static int globhack(const char *src, int flags, glob_t *pglob);
452static int glob_needed(const char *s);
453static int xglob(o_string *dest, int flags, glob_t *pglob);
454#endif
455
456static int is_assignment(const char *s);
457
458#ifndef __U_BOOT__
459static int setup_redirect(struct p_context *ctx, int fd, redir_type style, struct in_str *input);
460#endif
461static void initialize_context(struct p_context *ctx);
462static int done_word(o_string *dest, struct p_context *ctx);
463static int done_command(struct p_context *ctx);
464static int done_pipe(struct p_context *ctx, pipe_style type);
465
466#ifndef __U_BOOT__
467static int redirect_dup_num(struct in_str *input);
468static int redirect_opt_num(o_string *o);
469static int process_command_subs(o_string *dest, struct p_context *ctx, struct in_str *input, int subst_end);
470static int parse_group(o_string *dest, struct p_context *ctx, struct in_str *input, int ch);
471#endif
472static char *lookup_param(char *src);
473static char *make_string(char **inp, int *nonnull);
474static int handle_dollar(o_string *dest, struct p_context *ctx, struct in_str *input);
475#ifndef __U_BOOT__
476static int parse_string(o_string *dest, struct p_context *ctx, const char *src);
477#endif
478static int parse_stream(o_string *dest, struct p_context *ctx, struct in_str *input0, int end_trigger);
479
480static int parse_stream_outer(struct in_str *inp, int flag);
481#ifndef __U_BOOT__
482static int parse_string_outer(const char *s, int flag);
483static int parse_file_outer(FILE *f);
484#endif
485#ifndef __U_BOOT__
486
487static int checkjobs(struct pipe* fg_pipe);
488static void insert_bg_job(struct pipe *pi);
489static void remove_bg_job(struct pipe *pi);
490#endif
491
492static char **make_list_in(char **inp, char *name);
493static char *insert_var_value(char *inp);
494static char *insert_var_value_sub(char *inp, int tag_subst);
495
496#ifndef __U_BOOT__
497
498
499
500
501
502
503static struct built_in_command bltins[] = {
504 {"bg", "Resume a job in the background", builtin_fg_bg},
505 {"break", "Exit for, while or until loop", builtin_not_written},
506 {"cd", "Change working directory", builtin_cd},
507 {"continue", "Continue for, while or until loop", builtin_not_written},
508 {"env", "Print all environment variables", builtin_env},
509 {"eval", "Construct and run shell command", builtin_eval},
510 {"exec", "Exec command, replacing this shell with the exec'd process",
511 builtin_exec},
512 {"exit", "Exit from shell()", builtin_exit},
513 {"export", "Set environment variable", builtin_export},
514 {"fg", "Bring job into the foreground", builtin_fg_bg},
515 {"jobs", "Lists the active jobs", builtin_jobs},
516 {"pwd", "Print current directory", builtin_pwd},
517 {"read", "Input environment variable", builtin_read},
518 {"return", "Return from a function", builtin_not_written},
519 {"set", "Set/unset shell local variables", builtin_set},
520 {"shift", "Shift positional parameters", builtin_shift},
521 {"trap", "Trap signals", builtin_not_written},
522 {"ulimit","Controls resource limits", builtin_not_written},
523 {"umask","Sets file creation mask", builtin_umask},
524 {"unset", "Unset environment variable", builtin_unset},
525 {".", "Source-in and run commands in a file", builtin_source},
526 {"help", "List shell built-in commands", builtin_help},
527 {NULL, NULL, NULL}
528};
529
530static const char *set_cwd(void)
531{
532 if(cwd==unknown)
533 cwd = NULL;
534 cwd = xgetcwd((char *)cwd);
535 if (!cwd)
536 cwd = unknown;
537 return cwd;
538}
539
540
541static int builtin_eval(struct child_prog *child)
542{
543 char *str = NULL;
544 int rcode = EXIT_SUCCESS;
545
546 if (child->argv[1]) {
547 str = make_string(child->argv + 1);
548 parse_string_outer(str, FLAG_EXIT_FROM_LOOP |
549 FLAG_PARSE_SEMICOLON);
550 free(str);
551 rcode = last_return_code;
552 }
553 return rcode;
554}
555
556
557static int builtin_cd(struct child_prog *child)
558{
559 char *newdir;
560 if (child->argv[1] == NULL)
561 newdir = env_get("HOME");
562 else
563 newdir = child->argv[1];
564 if (chdir(newdir)) {
565 printf("cd: %s: %s\n", newdir, strerror(errno));
566 return EXIT_FAILURE;
567 }
568 set_cwd();
569 return EXIT_SUCCESS;
570}
571
572
573static int builtin_env(struct child_prog *dummy)
574{
575 char **e = environ;
576 if (e == NULL) return EXIT_FAILURE;
577 for (; *e; e++) {
578 puts(*e);
579 }
580 return EXIT_SUCCESS;
581}
582
583
584static int builtin_exec(struct child_prog *child)
585{
586 if (child->argv[1] == NULL)
587 return EXIT_SUCCESS;
588 child->argv++;
589 pseudo_exec(child);
590
591}
592
593
594static int builtin_exit(struct child_prog *child)
595{
596 if (child->argv[1] == NULL)
597 exit(last_return_code);
598 exit (atoi(child->argv[1]));
599}
600
601
602static int builtin_export(struct child_prog *child)
603{
604 int res = 0;
605 char *name = child->argv[1];
606
607 if (name == NULL) {
608 return (builtin_env(child));
609 }
610
611 name = strdup(name);
612
613 if(name) {
614 char *value = strchr(name, '=');
615
616 if (!value) {
617 char *tmp;
618
619
620 value = get_local_var(name);
621 if (value) {
622 size_t ln = strlen(name);
623
624 tmp = realloc(name, ln+strlen(value)+2);
625 if(tmp==NULL)
626 res = -1;
627 else {
628 sprintf(tmp+ln, "=%s", value);
629 name = tmp;
630 }
631 } else {
632
633
634 res = 1;
635 }
636 }
637 }
638 if (res<0)
639 perror_msg("export");
640 else if(res==0)
641 res = set_local_var(name, 1);
642 else
643 res = 0;
644 free(name);
645 return res;
646}
647
648
649static int builtin_fg_bg(struct child_prog *child)
650{
651 int i, jobnum;
652 struct pipe *pi=NULL;
653
654 if (!interactive)
655 return EXIT_FAILURE;
656
657 if (!child->argv[1]) {
658 for (pi = job_list; pi; pi = pi->next) {
659 if (pi->jobid == last_jobid) {
660 break;
661 }
662 }
663 if (!pi) {
664 error_msg("%s: no current job", child->argv[0]);
665 return EXIT_FAILURE;
666 }
667 } else {
668 if (sscanf(child->argv[1], "%%%d", &jobnum) != 1) {
669 error_msg("%s: bad argument '%s'", child->argv[0], child->argv[1]);
670 return EXIT_FAILURE;
671 }
672 for (pi = job_list; pi; pi = pi->next) {
673 if (pi->jobid == jobnum) {
674 break;
675 }
676 }
677 if (!pi) {
678 error_msg("%s: %d: no such job", child->argv[0], jobnum);
679 return EXIT_FAILURE;
680 }
681 }
682
683 if (*child->argv[0] == 'f') {
684
685 tcsetpgrp(shell_terminal, pi->pgrp);
686 }
687
688
689 for (i = 0; i < pi->num_progs; i++)
690 pi->progs[i].is_stopped = 0;
691
692 if ( (i=kill(- pi->pgrp, SIGCONT)) < 0) {
693 if (i == ESRCH) {
694 remove_bg_job(pi);
695 } else {
696 perror_msg("kill (SIGCONT)");
697 }
698 }
699
700 pi->stopped_progs = 0;
701 return EXIT_SUCCESS;
702}
703
704
705static int builtin_help(struct child_prog *dummy)
706{
707 struct built_in_command *x;
708
709 printf("\nBuilt-in commands:\n");
710 printf("-------------------\n");
711 for (x = bltins; x->cmd; x++) {
712 if (x->descr==NULL)
713 continue;
714 printf("%s\t%s\n", x->cmd, x->descr);
715 }
716 printf("\n\n");
717 return EXIT_SUCCESS;
718}
719
720
721static int builtin_jobs(struct child_prog *child)
722{
723 struct pipe *job;
724 char *status_string;
725
726 for (job = job_list; job; job = job->next) {
727 if (job->running_progs == job->stopped_progs)
728 status_string = "Stopped";
729 else
730 status_string = "Running";
731
732 printf(JOB_STATUS_FORMAT, job->jobid, status_string, job->text);
733 }
734 return EXIT_SUCCESS;
735}
736
737
738
739static int builtin_pwd(struct child_prog *dummy)
740{
741 puts(set_cwd());
742 return EXIT_SUCCESS;
743}
744
745
746static int builtin_read(struct child_prog *child)
747{
748 int res;
749
750 if (child->argv[1]) {
751 char string[BUFSIZ];
752 char *var = 0;
753
754 string[0] = 0;
755
756 fgets(string, sizeof(string), stdin);
757 chomp(string);
758 var = malloc(strlen(child->argv[1])+strlen(string)+2);
759 if(var) {
760 sprintf(var, "%s=%s", child->argv[1], string);
761 res = set_local_var(var, 0);
762 } else
763 res = -1;
764 if (res)
765 fprintf(stderr, "read: %m\n");
766 free(var);
767 return res;
768 } else {
769 do res=getchar(); while(res!='\n' && res!=EOF);
770 return 0;
771 }
772}
773
774
775static int builtin_set(struct child_prog *child)
776{
777 char *temp = child->argv[1];
778 struct variables *e;
779
780 if (temp == NULL)
781 for(e = top_vars; e; e=e->next)
782 printf("%s=%s\n", e->name, e->value);
783 else
784 set_local_var(temp, 0);
785
786 return EXIT_SUCCESS;
787}
788
789
790
791static int builtin_shift(struct child_prog *child)
792{
793 int n=1;
794 if (child->argv[1]) {
795 n=atoi(child->argv[1]);
796 }
797 if (n>=0 && n<global_argc) {
798
799 global_argc -= n;
800 global_argv += n;
801 return EXIT_SUCCESS;
802 } else {
803 return EXIT_FAILURE;
804 }
805}
806
807
808static int builtin_source(struct child_prog *child)
809{
810 FILE *input;
811 int status;
812
813 if (child->argv[1] == NULL)
814 return EXIT_FAILURE;
815
816
817 input = fopen(child->argv[1], "r");
818 if (!input) {
819 error_msg("Couldn't open file '%s'", child->argv[1]);
820 return EXIT_FAILURE;
821 }
822
823
824
825
826
827 mark_open(fileno(input));
828 status = parse_file_outer(input);
829 mark_closed(fileno(input));
830 fclose(input);
831 return (status);
832}
833
834static int builtin_umask(struct child_prog *child)
835{
836 mode_t new_umask;
837 const char *arg = child->argv[1];
838 char *end;
839 if (arg) {
840 new_umask=strtoul(arg, &end, 8);
841 if (*end!='\0' || end == arg) {
842 return EXIT_FAILURE;
843 }
844 } else {
845 printf("%.3o\n", (unsigned int) (new_umask=umask(0)));
846 }
847 umask(new_umask);
848 return EXIT_SUCCESS;
849}
850
851
852static int builtin_unset(struct child_prog *child)
853{
854
855 unset_local_var(child->argv[1]);
856 return EXIT_SUCCESS;
857}
858
859static int builtin_not_written(struct child_prog *child)
860{
861 printf("builtin_%s not written\n",child->argv[0]);
862 return EXIT_FAILURE;
863}
864#endif
865
866static int b_check_space(o_string *o, int len)
867{
868
869
870 if (o->length + len > o->maxlen) {
871 char *old_data = o->data;
872
873 o->maxlen += max(2*len, B_CHUNK);
874 o->data = realloc(o->data, 1 + o->maxlen);
875 if (o->data == NULL) {
876 free(old_data);
877 }
878 }
879 return o->data == NULL;
880}
881
882static int b_addchr(o_string *o, int ch)
883{
884 debug_printf("b_addchr: %c %d %p\n", ch, o->length, o);
885 if (b_check_space(o, 1)) return B_NOSPAC;
886 o->data[o->length] = ch;
887 o->length++;
888 o->data[o->length] = '\0';
889 return 0;
890}
891
892static void b_reset(o_string *o)
893{
894 o->length = 0;
895 o->nonnull = 0;
896 if (o->data != NULL) *o->data = '\0';
897}
898
899static void b_free(o_string *o)
900{
901 b_reset(o);
902 free(o->data);
903 o->data = NULL;
904 o->maxlen = 0;
905}
906
907
908
909
910static int b_addqchr(o_string *o, int ch, int quote)
911{
912 if (quote && strchr("*?[\\",ch)) {
913 int rc;
914 rc = b_addchr(o, '\\');
915 if (rc) return rc;
916 }
917 return b_addchr(o, ch);
918}
919
920#ifndef __U_BOOT__
921static int b_adduint(o_string *o, unsigned int i)
922{
923 int r;
924 char *p = simple_itoa(i);
925
926 do r=b_addchr(o, *p++); while (r==0 && *p);
927 return r;
928}
929#endif
930
931static int static_get(struct in_str *i)
932{
933 int ch = *i->p++;
934 if (ch=='\0') return EOF;
935 return ch;
936}
937
938static int static_peek(struct in_str *i)
939{
940 return *i->p;
941}
942
943#ifndef __U_BOOT__
944static inline void cmdedit_set_initial_prompt(void)
945{
946#ifndef CONFIG_FEATURE_SH_FANCY_PROMPT
947 PS1 = NULL;
948#else
949 PS1 = env_get("PS1");
950 if(PS1==0)
951 PS1 = "\\w \\$ ";
952#endif
953}
954
955static inline void setup_prompt_string(int promptmode, char **prompt_str)
956{
957 debug_printf("setup_prompt_string %d ",promptmode);
958#ifndef CONFIG_FEATURE_SH_FANCY_PROMPT
959
960 if (promptmode == 1) {
961 free(PS1);
962 PS1=xmalloc(strlen(cwd)+4);
963 sprintf(PS1, "%s %s", cwd, ( geteuid() != 0 ) ? "$ ":"# ");
964 *prompt_str = PS1;
965 } else {
966 *prompt_str = PS2;
967 }
968#else
969 *prompt_str = (promptmode==1)? PS1 : PS2;
970#endif
971 debug_printf("result %s\n",*prompt_str);
972}
973#endif
974
975#ifdef __U_BOOT__
976static int uboot_cli_readline(struct in_str *i)
977{
978 char *prompt;
979 char __maybe_unused *ps_prompt = NULL;
980
981 if (i->promptmode == 1)
982 prompt = CONFIG_SYS_PROMPT;
983 else
984 prompt = CONFIG_SYS_PROMPT_HUSH_PS2;
985
986#ifdef CONFIG_CMDLINE_PS_SUPPORT
987 if (i->promptmode == 1)
988 ps_prompt = env_get("PS1");
989 else
990 ps_prompt = env_get("PS2");
991 if (ps_prompt)
992 prompt = ps_prompt;
993#endif
994
995 return cli_readline(prompt);
996}
997#endif
998
999static void get_user_input(struct in_str *i)
1000{
1001#ifndef __U_BOOT__
1002 char *prompt_str;
1003 static char the_command[BUFSIZ];
1004
1005 setup_prompt_string(i->promptmode, &prompt_str);
1006#ifdef CONFIG_FEATURE_COMMAND_EDITING
1007
1008
1009
1010
1011
1012
1013 cmdedit_read_input(prompt_str, the_command);
1014#else
1015 fputs(prompt_str, stdout);
1016 fflush(stdout);
1017 the_command[0]=fgetc(i->file);
1018 the_command[1]='\0';
1019#endif
1020 fflush(stdout);
1021 i->p = the_command;
1022#else
1023 int n;
1024 static char the_command[CONFIG_SYS_CBSIZE + 1];
1025
1026 bootretry_reset_cmd_timeout();
1027 i->__promptme = 1;
1028 n = uboot_cli_readline(i);
1029
1030#ifdef CONFIG_BOOT_RETRY_TIME
1031 if (n == -2) {
1032 puts("\nTimeout waiting for command\n");
1033# ifdef CONFIG_RESET_TO_RETRY
1034 do_reset(NULL, 0, 0, NULL);
1035# else
1036# error "This currently only works with CONFIG_RESET_TO_RETRY enabled"
1037# endif
1038 }
1039#endif
1040 if (n == -1 ) {
1041 flag_repeat = 0;
1042 i->__promptme = 0;
1043 }
1044 n = strlen(console_buffer);
1045 console_buffer[n] = '\n';
1046 console_buffer[n+1]= '\0';
1047 if (had_ctrlc()) flag_repeat = 0;
1048 clear_ctrlc();
1049 do_repeat = 0;
1050 if (i->promptmode == 1) {
1051 if (console_buffer[0] == '\n'&& flag_repeat == 0) {
1052 strcpy(the_command,console_buffer);
1053 }
1054 else {
1055 if (console_buffer[0] != '\n') {
1056 strcpy(the_command,console_buffer);
1057 flag_repeat = 1;
1058 }
1059 else {
1060 do_repeat = 1;
1061 }
1062 }
1063 i->p = the_command;
1064 }
1065 else {
1066 if (console_buffer[0] != '\n') {
1067 if (strlen(the_command) + strlen(console_buffer)
1068 < CONFIG_SYS_CBSIZE) {
1069 n = strlen(the_command);
1070 the_command[n-1] = ' ';
1071 strcpy(&the_command[n],console_buffer);
1072 }
1073 else {
1074 the_command[0] = '\n';
1075 the_command[1] = '\0';
1076 flag_repeat = 0;
1077 }
1078 }
1079 if (i->__promptme == 0) {
1080 the_command[0] = '\n';
1081 the_command[1] = '\0';
1082 }
1083 i->p = console_buffer;
1084 }
1085#endif
1086}
1087
1088
1089
1090static int file_get(struct in_str *i)
1091{
1092 int ch;
1093
1094 ch = 0;
1095
1096 if (i->p && *i->p) {
1097 ch = *i->p++;
1098 } else {
1099
1100
1101#ifndef __U_BOOT__
1102 if (i->__promptme && interactive && i->file == stdin) {
1103 while(! i->p || (interactive && strlen(i->p)==0) ) {
1104#else
1105 while(! i->p || strlen(i->p)==0 ) {
1106#endif
1107 get_user_input(i);
1108 }
1109 i->promptmode=2;
1110#ifndef __U_BOOT__
1111 i->__promptme = 0;
1112#endif
1113 if (i->p && *i->p) {
1114 ch = *i->p++;
1115 }
1116#ifndef __U_BOOT__
1117 } else {
1118 ch = fgetc(i->file);
1119 }
1120
1121#endif
1122 debug_printf("b_getch: got a %d\n", ch);
1123 }
1124#ifndef __U_BOOT__
1125 if (ch == '\n') i->__promptme=1;
1126#endif
1127 return ch;
1128}
1129
1130
1131
1132
1133static int file_peek(struct in_str *i)
1134{
1135#ifndef __U_BOOT__
1136 if (i->p && *i->p) {
1137#endif
1138 return *i->p;
1139#ifndef __U_BOOT__
1140 } else {
1141 i->peek_buf[0] = fgetc(i->file);
1142 i->peek_buf[1] = '\0';
1143 i->p = i->peek_buf;
1144 debug_printf("b_peek: got a %d\n", *i->p);
1145 return *i->p;
1146 }
1147#endif
1148}
1149
1150#ifndef __U_BOOT__
1151static void setup_file_in_str(struct in_str *i, FILE *f)
1152#else
1153static void setup_file_in_str(struct in_str *i)
1154#endif
1155{
1156 i->peek = file_peek;
1157 i->get = file_get;
1158 i->__promptme=1;
1159 i->promptmode=1;
1160#ifndef __U_BOOT__
1161 i->file = f;
1162#endif
1163 i->p = NULL;
1164}
1165
1166static void setup_string_in_str(struct in_str *i, const char *s)
1167{
1168 i->peek = static_peek;
1169 i->get = static_get;
1170 i->__promptme=1;
1171 i->promptmode=1;
1172 i->p = s;
1173}
1174
1175#ifndef __U_BOOT__
1176static void mark_open(int fd)
1177{
1178 struct close_me *new = xmalloc(sizeof(struct close_me));
1179 new->fd = fd;
1180 new->next = close_me_head;
1181 close_me_head = new;
1182}
1183
1184static void mark_closed(int fd)
1185{
1186 struct close_me *tmp;
1187 if (close_me_head == NULL || close_me_head->fd != fd)
1188 error_msg_and_die("corrupt close_me");
1189 tmp = close_me_head;
1190 close_me_head = close_me_head->next;
1191 free(tmp);
1192}
1193
1194static void close_all(void)
1195{
1196 struct close_me *c;
1197 for (c=close_me_head; c; c=c->next) {
1198 close(c->fd);
1199 }
1200 close_me_head = NULL;
1201}
1202
1203
1204
1205static int setup_redirects(struct child_prog *prog, int squirrel[])
1206{
1207 int openfd, mode;
1208 struct redir_struct *redir;
1209
1210 for (redir=prog->redirects; redir; redir=redir->next) {
1211 if (redir->dup == -1 && redir->word.gl_pathv == NULL) {
1212
1213 continue;
1214 }
1215 if (redir->dup == -1) {
1216 mode=redir_table[redir->type].mode;
1217 openfd = open(redir->word.gl_pathv[0], mode, 0666);
1218 if (openfd < 0) {
1219
1220
1221 perror_msg("error opening %s", redir->word.gl_pathv[0]);
1222 return 1;
1223 }
1224 } else {
1225 openfd = redir->dup;
1226 }
1227
1228 if (openfd != redir->fd) {
1229 if (squirrel && redir->fd < 3) {
1230 squirrel[redir->fd] = dup(redir->fd);
1231 }
1232 if (openfd == -3) {
1233 close(openfd);
1234 } else {
1235 dup2(openfd, redir->fd);
1236 if (redir->dup == -1)
1237 close (openfd);
1238 }
1239 }
1240 }
1241 return 0;
1242}
1243
1244static void restore_redirects(int squirrel[])
1245{
1246 int i, fd;
1247 for (i=0; i<3; i++) {
1248 fd = squirrel[i];
1249 if (fd != -1) {
1250
1251
1252 dup2(fd, i);
1253 close(fd);
1254 }
1255 }
1256}
1257
1258
1259
1260
1261
1262static void pseudo_exec(struct child_prog *child)
1263{
1264 int i, rcode;
1265 char *p;
1266 struct built_in_command *x;
1267 if (child->argv) {
1268 for (i=0; is_assignment(child->argv[i]); i++) {
1269 debug_printf("pid %d environment modification: %s\n",getpid(),child->argv[i]);
1270 p = insert_var_value(child->argv[i]);
1271 putenv(strdup(p));
1272 if (p != child->argv[i]) free(p);
1273 }
1274 child->argv+=i;
1275
1276
1277
1278
1279
1280 if (child->argv[0] == NULL) {
1281 _exit(EXIT_SUCCESS);
1282 }
1283
1284
1285
1286
1287
1288
1289
1290 for (x = bltins; x->cmd; x++) {
1291 if (strcmp(child->argv[0], x->cmd) == 0 ) {
1292 debug_printf("builtin exec %s\n", child->argv[0]);
1293 rcode = x->function(child);
1294 fflush(stdout);
1295 _exit(rcode);
1296 }
1297 }
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308#ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
1309 {
1310 int argc_l;
1311 char** argv_l=child->argv;
1312 char *name = child->argv[0];
1313
1314#ifdef CONFIG_FEATURE_SH_APPLETS_ALWAYS_WIN
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324 name = get_last_path_component(name);
1325#endif
1326
1327 for(argc_l=0;*argv_l!=NULL; argv_l++, argc_l++);
1328 optind = 1;
1329 debug_printf("running applet %s\n", name);
1330 run_applet_by_name(name, argc_l, child->argv);
1331 }
1332#endif
1333 debug_printf("exec of %s\n",child->argv[0]);
1334 execvp(child->argv[0],child->argv);
1335 perror_msg("couldn't exec: %s",child->argv[0]);
1336 _exit(1);
1337 } else if (child->group) {
1338 debug_printf("runtime nesting to group\n");
1339 interactive=0;
1340 rcode = run_list_real(child->group);
1341
1342
1343 _exit(rcode);
1344 } else {
1345
1346 debug_printf("trying to pseudo_exec null command\n");
1347 _exit(EXIT_SUCCESS);
1348 }
1349}
1350
1351static void insert_bg_job(struct pipe *pi)
1352{
1353 struct pipe *thejob;
1354
1355
1356 pi->jobid = 1;
1357 for (thejob = job_list; thejob; thejob = thejob->next)
1358 if (thejob->jobid >= pi->jobid)
1359 pi->jobid = thejob->jobid + 1;
1360
1361
1362 if (!job_list) {
1363 thejob = job_list = xmalloc(sizeof(*thejob));
1364 } else {
1365 for (thejob = job_list; thejob->next; thejob = thejob->next) ;
1366 thejob->next = xmalloc(sizeof(*thejob));
1367 thejob = thejob->next;
1368 }
1369
1370
1371 memcpy(thejob, pi, sizeof(struct pipe));
1372 thejob->next = NULL;
1373 thejob->running_progs = thejob->num_progs;
1374 thejob->stopped_progs = 0;
1375 thejob->text = xmalloc(BUFSIZ);
1376
1377
1378 {
1379 char *bar=thejob->text;
1380 char **foo=pi->progs[0].argv;
1381 while(foo && *foo) {
1382 bar += sprintf(bar, "%s ", *foo++);
1383 }
1384 }
1385
1386
1387
1388 printf("[%d] %d\n", thejob->jobid, thejob->progs[0].pid);
1389 last_bg_pid = thejob->progs[0].pid;
1390 last_jobid = thejob->jobid;
1391}
1392
1393
1394static void remove_bg_job(struct pipe *pi)
1395{
1396 struct pipe *prev_pipe;
1397
1398 if (pi == job_list) {
1399 job_list = pi->next;
1400 } else {
1401 prev_pipe = job_list;
1402 while (prev_pipe->next != pi)
1403 prev_pipe = prev_pipe->next;
1404 prev_pipe->next = pi->next;
1405 }
1406 if (job_list)
1407 last_jobid = job_list->jobid;
1408 else
1409 last_jobid = 0;
1410
1411 pi->stopped_progs = 0;
1412 free_pipe(pi, 0);
1413 free(pi);
1414}
1415
1416
1417
1418static int checkjobs(struct pipe* fg_pipe)
1419{
1420 int attributes;
1421 int status;
1422 int prognum = 0;
1423 struct pipe *pi;
1424 pid_t childpid;
1425
1426 attributes = WUNTRACED;
1427 if (fg_pipe==NULL) {
1428 attributes |= WNOHANG;
1429 }
1430
1431 while ((childpid = waitpid(-1, &status, attributes)) > 0) {
1432 if (fg_pipe) {
1433 int i, rcode = 0;
1434 for (i=0; i < fg_pipe->num_progs; i++) {
1435 if (fg_pipe->progs[i].pid == childpid) {
1436 if (i==fg_pipe->num_progs-1)
1437 rcode=WEXITSTATUS(status);
1438 (fg_pipe->num_progs)--;
1439 return(rcode);
1440 }
1441 }
1442 }
1443
1444 for (pi = job_list; pi; pi = pi->next) {
1445 prognum = 0;
1446 while (prognum < pi->num_progs && pi->progs[prognum].pid != childpid) {
1447 prognum++;
1448 }
1449 if (prognum < pi->num_progs)
1450 break;
1451 }
1452
1453 if(pi==NULL) {
1454 debug_printf("checkjobs: pid %d was not in our list!\n", childpid);
1455 continue;
1456 }
1457
1458 if (WIFEXITED(status) || WIFSIGNALED(status)) {
1459
1460 pi->running_progs--;
1461 pi->progs[prognum].pid = 0;
1462
1463 if (!pi->running_progs) {
1464 printf(JOB_STATUS_FORMAT, pi->jobid, "Done", pi->text);
1465 remove_bg_job(pi);
1466 }
1467 } else {
1468
1469 pi->stopped_progs++;
1470 pi->progs[prognum].is_stopped = 1;
1471
1472#if 0
1473
1474
1475
1476 if (pi->stopped_progs == pi->num_progs) {
1477 printf("\n"JOB_STATUS_FORMAT, pi->jobid, "Stopped", pi->text);
1478 }
1479#endif
1480 }
1481 }
1482
1483 if (childpid == -1 && errno != ECHILD)
1484 perror_msg("waitpid");
1485
1486
1487
1488
1489 return -1;
1490}
1491
1492
1493
1494
1495
1496
1497void controlling_tty(int check_pgrp)
1498{
1499 pid_t curpgrp;
1500
1501 if ((curpgrp = tcgetpgrp(shell_terminal = 2)) < 0
1502 && (curpgrp = tcgetpgrp(shell_terminal = 0)) < 0
1503 && (curpgrp = tcgetpgrp(shell_terminal = 1)) < 0)
1504 goto shell_terminal_error;
1505
1506 if (check_pgrp && curpgrp != getpgid(0))
1507 goto shell_terminal_error;
1508
1509 return;
1510
1511shell_terminal_error:
1512 shell_terminal = -1;
1513 return;
1514}
1515#endif
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533static int run_pipe_real(struct pipe *pi)
1534{
1535 int i;
1536#ifndef __U_BOOT__
1537 int nextin, nextout;
1538 int pipefds[2];
1539 struct child_prog *child;
1540 struct built_in_command *x;
1541 char *p;
1542# if __GNUC__
1543
1544 (void) &i;
1545 (void) &nextin;
1546 (void) &nextout;
1547 (void) &child;
1548# endif
1549#else
1550 int nextin;
1551 int flag = do_repeat ? CMD_FLAG_REPEAT : 0;
1552 struct child_prog *child;
1553 char *p;
1554# if __GNUC__
1555
1556 (void) &i;
1557 (void) &nextin;
1558 (void) &child;
1559# endif
1560#endif
1561
1562 nextin = 0;
1563#ifndef __U_BOOT__
1564 pi->pgrp = -1;
1565#endif
1566
1567
1568
1569
1570
1571 if (pi->num_progs == 1) child = & (pi->progs[0]);
1572#ifndef __U_BOOT__
1573 if (pi->num_progs == 1 && child->group && child->subshell == 0) {
1574 int squirrel[] = {-1, -1, -1};
1575 int rcode;
1576 debug_printf("non-subshell grouping\n");
1577 setup_redirects(child, squirrel);
1578
1579
1580 rcode = run_list_real(child->group);
1581 restore_redirects(squirrel);
1582#else
1583 if (pi->num_progs == 1 && child->group) {
1584 int rcode;
1585 debug_printf("non-subshell grouping\n");
1586 rcode = run_list_real(child->group);
1587#endif
1588 return rcode;
1589 } else if (pi->num_progs == 1 && pi->progs[0].argv != NULL) {
1590 for (i=0; is_assignment(child->argv[i]); i++) { }
1591 if (i!=0 && child->argv[i]==NULL) {
1592
1593 for (i=0; child->argv[i]!=NULL; i++) {
1594
1595
1596
1597
1598
1599
1600
1601 int export_me=0;
1602 char *name, *value;
1603 name = xstrdup(child->argv[i]);
1604 debug_printf("Local environment set: %s\n", name);
1605 value = strchr(name, '=');
1606 if (value)
1607 *value=0;
1608#ifndef __U_BOOT__
1609 if ( get_local_var(name)) {
1610 export_me=1;
1611 }
1612#endif
1613 free(name);
1614 p = insert_var_value(child->argv[i]);
1615 set_local_var(p, export_me);
1616 if (p != child->argv[i]) free(p);
1617 }
1618 return EXIT_SUCCESS;
1619 }
1620 for (i = 0; is_assignment(child->argv[i]); i++) {
1621 p = insert_var_value(child->argv[i]);
1622#ifndef __U_BOOT__
1623 putenv(strdup(p));
1624#else
1625 set_local_var(p, 0);
1626#endif
1627 if (p != child->argv[i]) {
1628 child->sp--;
1629 free(p);
1630 }
1631 }
1632 if (child->sp) {
1633 char * str = NULL;
1634
1635 str = make_string(child->argv + i,
1636 child->argv_nonnull + i);
1637 parse_string_outer(str, FLAG_EXIT_FROM_LOOP | FLAG_REPARSING);
1638 free(str);
1639 return last_return_code;
1640 }
1641#ifndef __U_BOOT__
1642 for (x = bltins; x->cmd; x++) {
1643 if (strcmp(child->argv[i], x->cmd) == 0 ) {
1644 int squirrel[] = {-1, -1, -1};
1645 int rcode;
1646 if (x->function == builtin_exec && child->argv[i+1]==NULL) {
1647 debug_printf("magic exec\n");
1648 setup_redirects(child,NULL);
1649 return EXIT_SUCCESS;
1650 }
1651 debug_printf("builtin inline %s\n", child->argv[0]);
1652
1653
1654
1655
1656 setup_redirects(child, squirrel);
1657
1658 child->argv += i;
1659 rcode = x->function(child);
1660
1661 child->argv -= i;
1662 restore_redirects(squirrel);
1663 }
1664 return rcode;
1665 }
1666#else
1667
1668
1669
1670 if (strchr(child->argv[i], ';')) {
1671 printf("Unknown command '%s' - try 'help' or use "
1672 "'run' command\n", child->argv[i]);
1673 return -1;
1674 }
1675
1676 return cmd_process(flag, child->argc - i, child->argv + i,
1677 &flag_repeat, NULL);
1678#endif
1679 }
1680#ifndef __U_BOOT__
1681
1682 for (i = 0; i < pi->num_progs; i++) {
1683 child = & (pi->progs[i]);
1684
1685
1686 if ((i + 1) < pi->num_progs) {
1687 if (pipe(pipefds)<0) perror_msg_and_die("pipe");
1688 nextout = pipefds[1];
1689 } else {
1690 nextout=1;
1691 pipefds[0] = -1;
1692 }
1693
1694
1695 if (!(child->pid = fork())) {
1696
1697 signal(SIGINT, SIG_DFL);
1698 signal(SIGQUIT, SIG_DFL);
1699 signal(SIGTERM, SIG_DFL);
1700 signal(SIGTSTP, SIG_DFL);
1701 signal(SIGTTIN, SIG_DFL);
1702 signal(SIGTTOU, SIG_DFL);
1703 signal(SIGCHLD, SIG_DFL);
1704
1705 close_all();
1706
1707 if (nextin != 0) {
1708 dup2(nextin, 0);
1709 close(nextin);
1710 }
1711 if (nextout != 1) {
1712 dup2(nextout, 1);
1713 close(nextout);
1714 }
1715 if (pipefds[0]!=-1) {
1716 close(pipefds[0]);
1717 }
1718
1719
1720
1721 setup_redirects(child,NULL);
1722
1723 if (interactive && pi->followup!=PIPE_BG) {
1724
1725
1726 if (pi->pgrp < 0) {
1727 pi->pgrp = getpid();
1728 }
1729 if (setpgid(0, pi->pgrp) == 0) {
1730 tcsetpgrp(2, pi->pgrp);
1731 }
1732 }
1733
1734 pseudo_exec(child);
1735 }
1736
1737
1738
1739
1740 if (pi->pgrp < 0) {
1741 pi->pgrp = child->pid;
1742 }
1743
1744
1745 setpgid(child->pid, pi->pgrp);
1746
1747 if (nextin != 0)
1748 close(nextin);
1749 if (nextout != 1)
1750 close(nextout);
1751
1752
1753
1754 nextin = pipefds[0];
1755 }
1756#endif
1757 return -1;
1758}
1759
1760static int run_list_real(struct pipe *pi)
1761{
1762 char *save_name = NULL;
1763 char **list = NULL;
1764 char **save_list = NULL;
1765 struct pipe *rpipe;
1766 int flag_rep = 0;
1767#ifndef __U_BOOT__
1768 int save_num_progs;
1769#endif
1770 int rcode=0, flag_skip=1;
1771 int flag_restore = 0;
1772 int if_code=0, next_if_code=0;
1773 reserved_style rmode, skip_more_in_this_rmode=RES_XXXX;
1774
1775 for (rpipe = pi; rpipe; rpipe = rpipe->next) {
1776 if ((rpipe->r_mode == RES_IN ||
1777 rpipe->r_mode == RES_FOR) &&
1778 (rpipe->next == NULL)) {
1779 syntax();
1780#ifdef __U_BOOT__
1781 flag_repeat = 0;
1782#endif
1783 return 1;
1784 }
1785 if ((rpipe->r_mode == RES_IN &&
1786 (rpipe->next->r_mode == RES_IN &&
1787 rpipe->next->progs->argv != NULL))||
1788 (rpipe->r_mode == RES_FOR &&
1789 rpipe->next->r_mode != RES_IN)) {
1790 syntax();
1791#ifdef __U_BOOT__
1792 flag_repeat = 0;
1793#endif
1794 return 1;
1795 }
1796 }
1797 for (; pi; pi = (flag_restore != 0) ? rpipe : pi->next) {
1798 if (pi->r_mode == RES_WHILE || pi->r_mode == RES_UNTIL ||
1799 pi->r_mode == RES_FOR) {
1800#ifdef __U_BOOT__
1801
1802 ctrlc();
1803 if ((had_ctrlc())) {
1804 return 1;
1805 }
1806#endif
1807 flag_restore = 0;
1808 if (!rpipe) {
1809 flag_rep = 0;
1810 rpipe = pi;
1811 }
1812 }
1813 rmode = pi->r_mode;
1814 debug_printf("rmode=%d if_code=%d next_if_code=%d skip_more=%d\n", rmode, if_code, next_if_code, skip_more_in_this_rmode);
1815 if (rmode == skip_more_in_this_rmode && flag_skip) {
1816 if (pi->followup == PIPE_SEQ) flag_skip=0;
1817 continue;
1818 }
1819 flag_skip = 1;
1820 skip_more_in_this_rmode = RES_XXXX;
1821 if (rmode == RES_THEN || rmode == RES_ELSE) if_code = next_if_code;
1822 if (rmode == RES_THEN && if_code) continue;
1823 if (rmode == RES_ELSE && !if_code) continue;
1824 if (rmode == RES_ELIF && !if_code) break;
1825 if (rmode == RES_FOR && pi->num_progs) {
1826 if (!list) {
1827
1828 if (!pi->next->progs->argv) continue;
1829
1830 list = make_list_in(pi->next->progs->argv,
1831 pi->progs->argv[0]);
1832 save_list = list;
1833 save_name = pi->progs->argv[0];
1834 pi->progs->argv[0] = NULL;
1835 flag_rep = 1;
1836 }
1837 if (!(*list)) {
1838 free(pi->progs->argv[0]);
1839 free(save_list);
1840 list = NULL;
1841 flag_rep = 0;
1842 pi->progs->argv[0] = save_name;
1843#ifndef __U_BOOT__
1844 pi->progs->glob_result.gl_pathv[0] =
1845 pi->progs->argv[0];
1846#endif
1847 continue;
1848 } else {
1849
1850 free(pi->progs->argv[0]);
1851 pi->progs->argv[0] = *list++;
1852#ifndef __U_BOOT__
1853 pi->progs->glob_result.gl_pathv[0] =
1854 pi->progs->argv[0];
1855#endif
1856 }
1857 }
1858 if (rmode == RES_IN) continue;
1859 if (rmode == RES_DO) {
1860 if (!flag_rep) continue;
1861 }
1862 if (rmode == RES_DONE) {
1863 if (flag_rep) {
1864 flag_restore = 1;
1865 } else {
1866 rpipe = NULL;
1867 }
1868 }
1869 if (pi->num_progs == 0) continue;
1870#ifndef __U_BOOT__
1871 save_num_progs = pi->num_progs;
1872#endif
1873 rcode = run_pipe_real(pi);
1874 debug_printf("run_pipe_real returned %d\n",rcode);
1875#ifndef __U_BOOT__
1876 if (rcode!=-1) {
1877
1878
1879 } else if (pi->followup==PIPE_BG) {
1880
1881
1882
1883 insert_bg_job(pi);
1884 rcode = EXIT_SUCCESS;
1885 } else {
1886 if (interactive) {
1887
1888 if (tcsetpgrp(shell_terminal, pi->pgrp) && errno != ENOTTY)
1889 perror_msg("tcsetpgrp-3");
1890 rcode = checkjobs(pi);
1891
1892 if (tcsetpgrp(shell_terminal, getpgid(0)) && errno != ENOTTY)
1893 perror_msg("tcsetpgrp-4");
1894 } else {
1895 rcode = checkjobs(pi);
1896 }
1897 debug_printf("checkjobs returned %d\n",rcode);
1898 }
1899 last_return_code=rcode;
1900#else
1901 if (rcode < -1) {
1902 last_return_code = -rcode - 2;
1903 return -2;
1904 }
1905 last_return_code=(rcode == 0) ? 0 : 1;
1906#endif
1907#ifndef __U_BOOT__
1908 pi->num_progs = save_num_progs;
1909#endif
1910 if ( rmode == RES_IF || rmode == RES_ELIF )
1911 next_if_code=rcode;
1912 if (rmode == RES_WHILE)
1913 flag_rep = !last_return_code;
1914 if (rmode == RES_UNTIL)
1915 flag_rep = last_return_code;
1916 if ( (rcode==EXIT_SUCCESS && pi->followup==PIPE_OR) ||
1917 (rcode!=EXIT_SUCCESS && pi->followup==PIPE_AND) )
1918 skip_more_in_this_rmode=rmode;
1919#ifndef __U_BOOT__
1920 checkjobs(NULL);
1921#endif
1922 }
1923 return rcode;
1924}
1925
1926
1927static char *indenter(int i)
1928{
1929 static char blanks[]=" ";
1930 return &blanks[sizeof(blanks)-i-1];
1931}
1932
1933
1934static int free_pipe(struct pipe *pi, int indent)
1935{
1936 char **p;
1937 struct child_prog *child;
1938#ifndef __U_BOOT__
1939 struct redir_struct *r, *rnext;
1940#endif
1941 int a, i, ret_code=0;
1942 char *ind = indenter(indent);
1943
1944#ifndef __U_BOOT__
1945 if (pi->stopped_progs > 0)
1946 return ret_code;
1947 final_printf("%s run pipe: (pid %d)\n",ind,getpid());
1948#endif
1949 for (i=0; i<pi->num_progs; i++) {
1950 child = &pi->progs[i];
1951 final_printf("%s command %d:\n",ind,i);
1952 if (child->argv) {
1953 for (a=0,p=child->argv; *p; a++,p++) {
1954 final_printf("%s argv[%d] = %s\n",ind,a,*p);
1955 }
1956#ifndef __U_BOOT__
1957 globfree(&child->glob_result);
1958#else
1959 for (a = 0; a < child->argc; a++) {
1960 free(child->argv[a]);
1961 }
1962 free(child->argv);
1963 free(child->argv_nonnull);
1964 child->argc = 0;
1965#endif
1966 child->argv=NULL;
1967 } else if (child->group) {
1968#ifndef __U_BOOT__
1969 final_printf("%s begin group (subshell:%d)\n",ind, child->subshell);
1970#endif
1971 ret_code = free_pipe_list(child->group,indent+3);
1972 final_printf("%s end group\n",ind);
1973 } else {
1974 final_printf("%s (nil)\n",ind);
1975 }
1976#ifndef __U_BOOT__
1977 for (r=child->redirects; r; r=rnext) {
1978 final_printf("%s redirect %d%s", ind, r->fd, redir_table[r->type].descrip);
1979 if (r->dup == -1) {
1980
1981 if (r->word.gl_pathv) {
1982 final_printf(" %s\n", *r->word.gl_pathv);
1983 globfree(&r->word);
1984 }
1985 } else {
1986 final_printf("&%d\n", r->dup);
1987 }
1988 rnext=r->next;
1989 free(r);
1990 }
1991 child->redirects=NULL;
1992#endif
1993 }
1994 free(pi->progs);
1995 pi->progs=NULL;
1996 return ret_code;
1997}
1998
1999static int free_pipe_list(struct pipe *head, int indent)
2000{
2001 int rcode=0;
2002 struct pipe *pi, *next;
2003 char *ind = indenter(indent);
2004 for (pi=head; pi; pi=next) {
2005 final_printf("%s pipe reserved mode %d\n", ind, pi->r_mode);
2006 rcode = free_pipe(pi, indent);
2007 final_printf("%s pipe followup code %d\n", ind, pi->followup);
2008 next=pi->next;
2009 pi->next=NULL;
2010 free(pi);
2011 }
2012 return rcode;
2013}
2014
2015
2016static int run_list(struct pipe *pi)
2017{
2018 int rcode=0;
2019#ifndef __U_BOOT__
2020 if (fake_mode==0) {
2021#endif
2022 rcode = run_list_real(pi);
2023#ifndef __U_BOOT__
2024 }
2025#endif
2026
2027
2028
2029 free_pipe_list(pi,0);
2030 return rcode;
2031}
2032
2033
2034
2035
2036
2037
2038
2039
2040#ifndef __U_BOOT__
2041static int globhack(const char *src, int flags, glob_t *pglob)
2042{
2043 int cnt=0, pathc;
2044 const char *s;
2045 char *dest;
2046 for (cnt=1, s=src; s && *s; s++) {
2047 if (*s == '\\') s++;
2048 cnt++;
2049 }
2050 dest = malloc(cnt);
2051 if (!dest) return GLOB_NOSPACE;
2052 if (!(flags & GLOB_APPEND)) {
2053 pglob->gl_pathv=NULL;
2054 pglob->gl_pathc=0;
2055 pglob->gl_offs=0;
2056 pglob->gl_offs=0;
2057 }
2058 pathc = ++pglob->gl_pathc;
2059 pglob->gl_pathv = realloc(pglob->gl_pathv, (pathc+1)*sizeof(*pglob->gl_pathv));
2060 if (pglob->gl_pathv == NULL) return GLOB_NOSPACE;
2061 pglob->gl_pathv[pathc-1]=dest;
2062 pglob->gl_pathv[pathc]=NULL;
2063 for (s=src; s && *s; s++, dest++) {
2064 if (*s == '\\') s++;
2065 *dest = *s;
2066 }
2067 *dest='\0';
2068 return 0;
2069}
2070
2071
2072static int glob_needed(const char *s)
2073{
2074 for (; *s; s++) {
2075 if (*s == '\\') s++;
2076 if (strchr("*[?",*s)) return 1;
2077 }
2078 return 0;
2079}
2080
2081#if 0
2082static void globprint(glob_t *pglob)
2083{
2084 int i;
2085 debug_printf("glob_t at %p:\n", pglob);
2086 debug_printf(" gl_pathc=%d gl_pathv=%p gl_offs=%d gl_flags=%d\n",
2087 pglob->gl_pathc, pglob->gl_pathv, pglob->gl_offs, pglob->gl_flags);
2088 for (i=0; i<pglob->gl_pathc; i++)
2089 debug_printf("pglob->gl_pathv[%d] = %p = %s\n", i,
2090 pglob->gl_pathv[i], pglob->gl_pathv[i]);
2091}
2092#endif
2093
2094static int xglob(o_string *dest, int flags, glob_t *pglob)
2095{
2096 int gr;
2097
2098
2099
2100 if (dest->length == 0) {
2101 if (dest->nonnull) {
2102
2103 gr = globhack(dest->data, flags, pglob);
2104 debug_printf("globhack returned %d\n",gr);
2105 } else {
2106 return 0;
2107 }
2108 } else if (glob_needed(dest->data)) {
2109 gr = glob(dest->data, flags, NULL, pglob);
2110 debug_printf("glob returned %d\n",gr);
2111 if (gr == GLOB_NOMATCH) {
2112
2113 gr = globhack(dest->data, flags, pglob);
2114 debug_printf("globhack returned %d\n",gr);
2115 }
2116 } else {
2117 gr = globhack(dest->data, flags, pglob);
2118 debug_printf("globhack returned %d\n",gr);
2119 }
2120 if (gr == GLOB_NOSPACE)
2121 error_msg_and_die("out of memory during glob");
2122 if (gr != 0) {
2123 error_msg("glob(3) error %d",gr);
2124 }
2125
2126 return gr;
2127}
2128#endif
2129
2130#ifdef __U_BOOT__
2131static char *get_dollar_var(char ch);
2132#endif
2133
2134
2135char *get_local_var(const char *s)
2136{
2137 struct variables *cur;
2138
2139 if (!s)
2140 return NULL;
2141
2142#ifdef __U_BOOT__
2143 if (*s == '$')
2144 return get_dollar_var(s[1]);
2145#endif
2146
2147 for (cur = top_vars; cur; cur=cur->next)
2148 if(strcmp(cur->name, s)==0)
2149 return cur->value;
2150 return NULL;
2151}
2152
2153
2154
2155
2156
2157int set_local_var(const char *s, int flg_export)
2158{
2159 char *name, *value;
2160 int result=0;
2161 struct variables *cur;
2162
2163#ifdef __U_BOOT__
2164
2165 if (!isalpha(*s))
2166 return -1;
2167#endif
2168
2169 name=strdup(s);
2170
2171
2172
2173
2174 value = strchr(name, '=');
2175 if (value == NULL || *(value + 1) == 0) {
2176 free(name);
2177 return -1;
2178 }
2179 *value++ = 0;
2180
2181 for(cur = top_vars; cur; cur = cur->next) {
2182 if(strcmp(cur->name, name)==0)
2183 break;
2184 }
2185
2186 if(cur) {
2187 if(strcmp(cur->value, value)==0) {
2188 if(flg_export>0 && cur->flg_export==0)
2189 cur->flg_export=flg_export;
2190 else
2191 result++;
2192 } else {
2193 if(cur->flg_read_only) {
2194 error_msg("%s: readonly variable", name);
2195 result = -1;
2196 } else {
2197 if(flg_export>0 || cur->flg_export>1)
2198 cur->flg_export=1;
2199 free(cur->value);
2200
2201 cur->value = strdup(value);
2202 }
2203 }
2204 } else {
2205 cur = malloc(sizeof(struct variables));
2206 if(!cur) {
2207 result = -1;
2208 } else {
2209 cur->name = strdup(name);
2210 if (cur->name == NULL) {
2211 free(cur);
2212 result = -1;
2213 } else {
2214 struct variables *bottom = top_vars;
2215 cur->value = strdup(value);
2216 cur->next = NULL;
2217 cur->flg_export = flg_export;
2218 cur->flg_read_only = 0;
2219 while(bottom->next) bottom=bottom->next;
2220 bottom->next = cur;
2221 }
2222 }
2223 }
2224
2225#ifndef __U_BOOT__
2226 if(result==0 && cur->flg_export==1) {
2227 *(value-1) = '=';
2228 result = putenv(name);
2229 } else {
2230#endif
2231 free(name);
2232#ifndef __U_BOOT__
2233 if(result>0)
2234 result = 0;
2235 }
2236#endif
2237 return result;
2238}
2239
2240void unset_local_var(const char *name)
2241{
2242 struct variables *cur;
2243
2244 if (name) {
2245 for (cur = top_vars; cur; cur=cur->next) {
2246 if(strcmp(cur->name, name)==0)
2247 break;
2248 }
2249 if (cur != NULL) {
2250 struct variables *next = top_vars;
2251 if(cur->flg_read_only) {
2252 error_msg("%s: readonly variable", name);
2253 return;
2254 } else {
2255#ifndef __U_BOOT__
2256 if(cur->flg_export)
2257 unenv_set(cur->name);
2258#endif
2259 free(cur->name);
2260 free(cur->value);
2261 while (next->next != cur)
2262 next = next->next;
2263 next->next = cur->next;
2264 }
2265 free(cur);
2266 }
2267 }
2268}
2269
2270static int is_assignment(const char *s)
2271{
2272 if (s == NULL)
2273 return 0;
2274
2275 if (!isalpha(*s)) return 0;
2276 ++s;
2277 while(isalnum(*s) || *s=='_') ++s;
2278 return *s=='=';
2279}
2280
2281#ifndef __U_BOOT__
2282
2283
2284
2285
2286static int setup_redirect(struct p_context *ctx, int fd, redir_type style,
2287 struct in_str *input)
2288{
2289 struct child_prog *child=ctx->child;
2290 struct redir_struct *redir = child->redirects;
2291 struct redir_struct *last_redir=NULL;
2292
2293
2294 while(redir) {
2295 last_redir=redir;
2296 redir=redir->next;
2297 }
2298 redir = xmalloc(sizeof(struct redir_struct));
2299 redir->next=NULL;
2300 redir->word.gl_pathv=NULL;
2301 if (last_redir) {
2302 last_redir->next=redir;
2303 } else {
2304 child->redirects=redir;
2305 }
2306
2307 redir->type=style;
2308 redir->fd= (fd==-1) ? redir_table[style].default_fd : fd ;
2309
2310 debug_printf("Redirect type %d%s\n", redir->fd, redir_table[style].descrip);
2311
2312
2313 redir->dup = redirect_dup_num(input);
2314 if (redir->dup == -2) return 1;
2315 if (redir->dup != -1) {
2316
2317
2318
2319 debug_printf("Duplicating redirect '%d>&%d'\n", redir->fd, redir->dup);
2320 } else {
2321
2322
2323
2324
2325
2326 ctx->pending_redirect = redir;
2327 }
2328 return 0;
2329}
2330#endif
2331
2332static struct pipe *new_pipe(void)
2333{
2334 struct pipe *pi;
2335 pi = xmalloc(sizeof(struct pipe));
2336 pi->num_progs = 0;
2337 pi->progs = NULL;
2338 pi->next = NULL;
2339 pi->followup = 0;
2340 pi->r_mode = RES_NONE;
2341 return pi;
2342}
2343
2344static void initialize_context(struct p_context *ctx)
2345{
2346 ctx->pipe=NULL;
2347#ifndef __U_BOOT__
2348 ctx->pending_redirect=NULL;
2349#endif
2350 ctx->child=NULL;
2351 ctx->list_head=new_pipe();
2352 ctx->pipe=ctx->list_head;
2353 ctx->w=RES_NONE;
2354 ctx->stack=NULL;
2355#ifdef __U_BOOT__
2356 ctx->old_flag=0;
2357#endif
2358 done_command(ctx);
2359}
2360
2361
2362
2363
2364
2365
2366struct reserved_combo {
2367 char *literal;
2368 int code;
2369 long flag;
2370};
2371
2372
2373
2374
2375
2376static struct reserved_combo reserved_list[] = {
2377 { "if", RES_IF, FLAG_THEN | FLAG_START },
2378 { "then", RES_THEN, FLAG_ELIF | FLAG_ELSE | FLAG_FI },
2379 { "elif", RES_ELIF, FLAG_THEN },
2380 { "else", RES_ELSE, FLAG_FI },
2381 { "fi", RES_FI, FLAG_END },
2382 { "for", RES_FOR, FLAG_IN | FLAG_START },
2383 { "while", RES_WHILE, FLAG_DO | FLAG_START },
2384 { "until", RES_UNTIL, FLAG_DO | FLAG_START },
2385 { "in", RES_IN, FLAG_DO },
2386 { "do", RES_DO, FLAG_DONE },
2387 { "done", RES_DONE, FLAG_END }
2388};
2389#define NRES (sizeof(reserved_list)/sizeof(struct reserved_combo))
2390
2391static int reserved_word(o_string *dest, struct p_context *ctx)
2392{
2393 struct reserved_combo *r;
2394 for (r=reserved_list;
2395 r<reserved_list+NRES; r++) {
2396 if (strcmp(dest->data, r->literal) == 0) {
2397 debug_printf("found reserved word %s, code %d\n",r->literal,r->code);
2398 if (r->flag & FLAG_START) {
2399 struct p_context *new = xmalloc(sizeof(struct p_context));
2400 debug_printf("push stack\n");
2401 if (ctx->w == RES_IN || ctx->w == RES_FOR) {
2402 syntax();
2403 free(new);
2404 ctx->w = RES_SNTX;
2405 b_reset(dest);
2406 return 1;
2407 }
2408 *new = *ctx;
2409 initialize_context(ctx);
2410 ctx->stack=new;
2411 } else if ( ctx->w == RES_NONE || ! (ctx->old_flag & (1<<r->code))) {
2412 syntax();
2413 ctx->w = RES_SNTX;
2414 b_reset(dest);
2415 return 1;
2416 }
2417 ctx->w=r->code;
2418 ctx->old_flag = r->flag;
2419 if (ctx->old_flag & FLAG_END) {
2420 struct p_context *old;
2421 debug_printf("pop stack\n");
2422 done_pipe(ctx,PIPE_SEQ);
2423 old = ctx->stack;
2424 old->child->group = ctx->list_head;
2425#ifndef __U_BOOT__
2426 old->child->subshell = 0;
2427#endif
2428 *ctx = *old;
2429 free(old);
2430 }
2431 b_reset (dest);
2432 return 1;
2433 }
2434 }
2435 return 0;
2436}
2437
2438
2439
2440static int done_word(o_string *dest, struct p_context *ctx)
2441{
2442 struct child_prog *child=ctx->child;
2443#ifndef __U_BOOT__
2444 glob_t *glob_target;
2445 int gr, flags = 0;
2446#else
2447 char *str, *s;
2448 int argc, cnt;
2449#endif
2450
2451 debug_printf("done_word: %s %p\n", dest->data, child);
2452 if (dest->length == 0 && !dest->nonnull) {
2453 debug_printf(" true null, ignored\n");
2454 return 0;
2455 }
2456#ifndef __U_BOOT__
2457 if (ctx->pending_redirect) {
2458 glob_target = &ctx->pending_redirect->word;
2459 } else {
2460#endif
2461 if (child->group) {
2462 syntax();
2463 return 1;
2464 }
2465 if (!child->argv && (ctx->type & FLAG_PARSE_SEMICOLON)) {
2466 debug_printf("checking %s for reserved-ness\n",dest->data);
2467 if (reserved_word(dest,ctx)) return ctx->w==RES_SNTX;
2468 }
2469#ifndef __U_BOOT__
2470 glob_target = &child->glob_result;
2471 if (child->argv) flags |= GLOB_APPEND;
2472#else
2473 for (cnt = 1, s = dest->data; s && *s; s++) {
2474 if (*s == '\\') s++;
2475 cnt++;
2476 }
2477 str = malloc(cnt);
2478 if (!str) return 1;
2479 if ( child->argv == NULL) {
2480 child->argc=0;
2481 }
2482 argc = ++child->argc;
2483 child->argv = realloc(child->argv, (argc+1)*sizeof(*child->argv));
2484 if (child->argv == NULL) {
2485 free(str);
2486 return 1;
2487 }
2488 child->argv_nonnull = realloc(child->argv_nonnull,
2489 (argc+1)*sizeof(*child->argv_nonnull));
2490 if (child->argv_nonnull == NULL) {
2491 free(str);
2492 return 1;
2493 }
2494 child->argv[argc-1]=str;
2495 child->argv_nonnull[argc-1] = dest->nonnull;
2496 child->argv[argc]=NULL;
2497 child->argv_nonnull[argc] = 0;
2498 for (s = dest->data; s && *s; s++,str++) {
2499 if (*s == '\\') s++;
2500 *str = *s;
2501 }
2502 *str = '\0';
2503#endif
2504#ifndef __U_BOOT__
2505 }
2506 gr = xglob(dest, flags, glob_target);
2507 if (gr != 0) return 1;
2508#endif
2509
2510 b_reset(dest);
2511#ifndef __U_BOOT__
2512 if (ctx->pending_redirect) {
2513 ctx->pending_redirect=NULL;
2514 if (glob_target->gl_pathc != 1) {
2515 error_msg("ambiguous redirect");
2516 return 1;
2517 }
2518 } else {
2519 child->argv = glob_target->gl_pathv;
2520 }
2521#endif
2522 if (ctx->w == RES_FOR) {
2523 done_word(dest,ctx);
2524 done_pipe(ctx,PIPE_SEQ);
2525 }
2526 return 0;
2527}
2528
2529
2530
2531static int done_command(struct p_context *ctx)
2532{
2533
2534
2535
2536
2537
2538 struct pipe *pi=ctx->pipe;
2539 struct child_prog *prog=ctx->child;
2540
2541 if (prog && prog->group == NULL
2542 && prog->argv == NULL
2543#ifndef __U_BOOT__
2544 && prog->redirects == NULL) {
2545#else
2546 ) {
2547#endif
2548 debug_printf("done_command: skipping null command\n");
2549 return 0;
2550 } else if (prog) {
2551 pi->num_progs++;
2552 debug_printf("done_command: num_progs incremented to %d\n",pi->num_progs);
2553 } else {
2554 debug_printf("done_command: initializing\n");
2555 }
2556 pi->progs = xrealloc(pi->progs, sizeof(*pi->progs) * (pi->num_progs+1));
2557
2558 prog = pi->progs + pi->num_progs;
2559#ifndef __U_BOOT__
2560 prog->redirects = NULL;
2561#endif
2562 prog->argv = NULL;
2563 prog->argv_nonnull = NULL;
2564#ifndef __U_BOOT__
2565 prog->is_stopped = 0;
2566#endif
2567 prog->group = NULL;
2568#ifndef __U_BOOT__
2569 prog->glob_result.gl_pathv = NULL;
2570 prog->family = pi;
2571#endif
2572 prog->sp = 0;
2573 ctx->child = prog;
2574 prog->type = ctx->type;
2575
2576
2577 return 0;
2578}
2579
2580static int done_pipe(struct p_context *ctx, pipe_style type)
2581{
2582 struct pipe *new_p;
2583 done_command(ctx);
2584 debug_printf("done_pipe, type %d\n", type);
2585 ctx->pipe->followup = type;
2586 ctx->pipe->r_mode = ctx->w;
2587 new_p=new_pipe();
2588 ctx->pipe->next = new_p;
2589 ctx->pipe = new_p;
2590 ctx->child = NULL;
2591 done_command(ctx);
2592 return 0;
2593}
2594
2595#ifndef __U_BOOT__
2596
2597
2598
2599
2600static int redirect_dup_num(struct in_str *input)
2601{
2602 int ch, d=0, ok=0;
2603 ch = b_peek(input);
2604 if (ch != '&') return -1;
2605
2606 b_getch(input);
2607 ch=b_peek(input);
2608 if (ch == '-') {
2609 b_getch(input);
2610 return -3;
2611 }
2612 while (isdigit(ch)) {
2613 d = d*10+(ch-'0');
2614 ok=1;
2615 b_getch(input);
2616 ch = b_peek(input);
2617 }
2618 if (ok) return d;
2619
2620 error_msg("ambiguous redirect");
2621 return -2;
2622}
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635static int redirect_opt_num(o_string *o)
2636{
2637 int num;
2638
2639 if (o->length==0) return -1;
2640 for(num=0; num<o->length; num++) {
2641 if (!isdigit(*(o->data+num))) {
2642 return -1;
2643 }
2644 }
2645
2646 num=atoi(o->data);
2647 b_reset(o);
2648 return num;
2649}
2650
2651FILE *generate_stream_from_list(struct pipe *head)
2652{
2653 FILE *pf;
2654#if 1
2655 int pid, channel[2];
2656 if (pipe(channel)<0) perror_msg_and_die("pipe");
2657 pid=fork();
2658 if (pid<0) {
2659 perror_msg_and_die("fork");
2660 } else if (pid==0) {
2661 close(channel[0]);
2662 if (channel[1] != 1) {
2663 dup2(channel[1],1);
2664 close(channel[1]);
2665 }
2666#if 0
2667#define SURROGATE "surrogate response"
2668 write(1,SURROGATE,sizeof(SURROGATE));
2669 _exit(run_list(head));
2670#else
2671 _exit(run_list_real(head));
2672#endif
2673 }
2674 debug_printf("forked child %d\n",pid);
2675 close(channel[1]);
2676 pf = fdopen(channel[0],"r");
2677 debug_printf("pipe on FILE *%p\n",pf);
2678#else
2679 free_pipe_list(head,0);
2680 pf=popen("echo surrogate response","r");
2681 debug_printf("started fake pipe on FILE *%p\n",pf);
2682#endif
2683 return pf;
2684}
2685
2686
2687
2688static int process_command_subs(o_string *dest, struct p_context *ctx, struct in_str *input, int subst_end)
2689{
2690 int retcode;
2691 o_string result=NULL_O_STRING;
2692 struct p_context inner;
2693 FILE *p;
2694 struct in_str pipe_str;
2695 initialize_context(&inner);
2696
2697
2698 retcode = parse_stream(&result, &inner, input, subst_end);
2699 if (retcode != 0) return retcode;
2700 done_word(&result, &inner);
2701 done_pipe(&inner, PIPE_SEQ);
2702 b_free(&result);
2703
2704 p=generate_stream_from_list(inner.list_head);
2705 if (p==NULL) return 1;
2706 mark_open(fileno(p));
2707 setup_file_in_str(&pipe_str, p);
2708
2709
2710 retcode = parse_stream(dest, ctx, &pipe_str, '\0');
2711
2712
2713 if (retcode == 1) {
2714 while (b_getch(&pipe_str)!=EOF) { };
2715 }
2716
2717 debug_printf("done reading from pipe, pclose()ing\n");
2718
2719
2720
2721
2722
2723 mark_closed(fileno(p));
2724 retcode=pclose(p);
2725 free_pipe_list(inner.list_head,0);
2726 debug_printf("pclosed, retcode=%d\n",retcode);
2727
2728 return retcode;
2729}
2730
2731static int parse_group(o_string *dest, struct p_context *ctx,
2732 struct in_str *input, int ch)
2733{
2734 int rcode, endch=0;
2735 struct p_context sub;
2736 struct child_prog *child = ctx->child;
2737 if (child->argv) {
2738 syntax();
2739 return 1;
2740 }
2741 initialize_context(&sub);
2742 switch(ch) {
2743 case '(': endch=')'; child->subshell=1; break;
2744 case '{': endch='}'; break;
2745 default: syntax();
2746 }
2747 rcode=parse_stream(dest,&sub,input,endch);
2748 done_word(dest,&sub);
2749 done_pipe(&sub, PIPE_SEQ);
2750 child->group = sub.list_head;
2751 return rcode;
2752
2753}
2754#endif
2755
2756
2757
2758static char *lookup_param(char *src)
2759{
2760 char *p;
2761 char *sep;
2762 char *default_val = NULL;
2763 int assign = 0;
2764 int expand_empty = 0;
2765
2766 if (!src)
2767 return NULL;
2768
2769 sep = strchr(src, ':');
2770
2771 if (sep) {
2772 *sep = '\0';
2773 if (*(sep + 1) == '-')
2774 default_val = sep+2;
2775 if (*(sep + 1) == '=') {
2776 default_val = sep+2;
2777 assign = 1;
2778 }
2779 if (*(sep + 1) == '+') {
2780 default_val = sep+2;
2781 expand_empty = 1;
2782 }
2783 }
2784
2785 p = env_get(src);
2786 if (!p)
2787 p = get_local_var(src);
2788
2789 if (!p || strlen(p) == 0) {
2790 p = default_val;
2791 if (assign) {
2792 char *var = malloc(strlen(src)+strlen(default_val)+2);
2793 if (var) {
2794 sprintf(var, "%s=%s", src, default_val);
2795 set_local_var(var, 0);
2796 }
2797 free(var);
2798 }
2799 } else if (expand_empty) {
2800 p += strlen(p);
2801 }
2802
2803 if (sep)
2804 *sep = ':';
2805
2806 return p;
2807}
2808
2809#ifdef __U_BOOT__
2810static char *get_dollar_var(char ch)
2811{
2812 static char buf[40];
2813
2814 buf[0] = '\0';
2815 switch (ch) {
2816 case '?':
2817 sprintf(buf, "%u", (unsigned int)last_return_code);
2818 break;
2819 default:
2820 return NULL;
2821 }
2822 return buf;
2823}
2824#endif
2825
2826
2827static int handle_dollar(o_string *dest, struct p_context *ctx, struct in_str *input)
2828{
2829#ifndef __U_BOOT__
2830 int i, advance=0;
2831#else
2832 int advance=0;
2833#endif
2834#ifndef __U_BOOT__
2835 char sep[]=" ";
2836#endif
2837 int ch = input->peek(input);
2838 debug_printf("handle_dollar: ch=%c\n",ch);
2839 if (isalpha(ch)) {
2840 b_addchr(dest, SPECIAL_VAR_SYMBOL);
2841 ctx->child->sp++;
2842 while(ch=b_peek(input),isalnum(ch) || ch=='_') {
2843 b_getch(input);
2844 b_addchr(dest,ch);
2845 }
2846 b_addchr(dest, SPECIAL_VAR_SYMBOL);
2847#ifndef __U_BOOT__
2848 } else if (isdigit(ch)) {
2849 i = ch-'0';
2850 if (i<global_argc) {
2851 parse_string(dest, ctx, global_argv[i]);
2852 }
2853 advance = 1;
2854#endif
2855 } else switch (ch) {
2856#ifndef __U_BOOT__
2857 case '$':
2858 b_adduint(dest,getpid());
2859 advance = 1;
2860 break;
2861 case '!':
2862 if (last_bg_pid > 0) b_adduint(dest, last_bg_pid);
2863 advance = 1;
2864 break;
2865#endif
2866 case '?':
2867#ifndef __U_BOOT__
2868 b_adduint(dest,last_return_code);
2869#else
2870 ctx->child->sp++;
2871 b_addchr(dest, SPECIAL_VAR_SYMBOL);
2872 b_addchr(dest, '$');
2873 b_addchr(dest, '?');
2874 b_addchr(dest, SPECIAL_VAR_SYMBOL);
2875#endif
2876 advance = 1;
2877 break;
2878#ifndef __U_BOOT__
2879 case '#':
2880 b_adduint(dest,global_argc ? global_argc-1 : 0);
2881 advance = 1;
2882 break;
2883#endif
2884 case '{':
2885 b_addchr(dest, SPECIAL_VAR_SYMBOL);
2886 ctx->child->sp++;
2887 b_getch(input);
2888
2889 while(ch=b_getch(input),ch!=EOF && ch!='}') {
2890 b_addchr(dest,ch);
2891 }
2892 if (ch != '}') {
2893 syntax();
2894 return 1;
2895 }
2896 b_addchr(dest, SPECIAL_VAR_SYMBOL);
2897 break;
2898#ifndef __U_BOOT__
2899 case '(':
2900 b_getch(input);
2901 process_command_subs(dest, ctx, input, ')');
2902 break;
2903 case '*':
2904 sep[0]=ifs[0];
2905 for (i=1; i<global_argc; i++) {
2906 parse_string(dest, ctx, global_argv[i]);
2907 if (i+1 < global_argc) parse_string(dest, ctx, sep);
2908 }
2909 break;
2910 case '@':
2911 case '-':
2912 case '_':
2913
2914 error_msg("unhandled syntax: $%c",ch);
2915 return 1;
2916 break;
2917#endif
2918 default:
2919 b_addqchr(dest,'$',dest->quote);
2920 }
2921
2922
2923
2924
2925
2926 if (advance) b_getch(input);
2927 return 0;
2928}
2929
2930#ifndef __U_BOOT__
2931int parse_string(o_string *dest, struct p_context *ctx, const char *src)
2932{
2933 struct in_str foo;
2934 setup_string_in_str(&foo, src);
2935 return parse_stream(dest, ctx, &foo, '\0');
2936}
2937#endif
2938
2939
2940static int parse_stream(o_string *dest, struct p_context *ctx,
2941 struct in_str *input, int end_trigger)
2942{
2943 unsigned int ch, m;
2944#ifndef __U_BOOT__
2945 int redir_fd;
2946 redir_type redir_style;
2947#endif
2948 int next;
2949
2950
2951
2952
2953
2954 debug_printf("parse_stream, end_trigger=%d\n",end_trigger);
2955 while ((ch=b_getch(input))!=EOF) {
2956 m = map[ch];
2957#ifdef __U_BOOT__
2958 if (input->__promptme == 0) return 1;
2959#endif
2960 next = (ch == '\n') ? 0 : b_peek(input);
2961
2962 debug_printf("parse_stream: ch=%c (%d) m=%d quote=%d - %c\n",
2963 ch >= ' ' ? ch : '.', ch, m,
2964 dest->quote, ctx->stack == NULL ? '*' : '.');
2965
2966 if (m==0 || ((m==1 || m==2) && dest->quote)) {
2967 b_addqchr(dest, ch, dest->quote);
2968 } else {
2969 if (m==2) {
2970 if (done_word(dest, ctx)) {
2971 return 1;
2972 }
2973
2974
2975 if (end_trigger != '\0' && ch=='\n')
2976 done_pipe(ctx,PIPE_SEQ);
2977 }
2978 if (ch == end_trigger && !dest->quote && ctx->w==RES_NONE) {
2979 debug_printf("leaving parse_stream (triggered)\n");
2980 return 0;
2981 }
2982#if 0
2983 if (ch=='\n') {
2984
2985 done_pipe(ctx,PIPE_SEQ);
2986 run_list(ctx->list_head);
2987 initialize_context(ctx);
2988 }
2989#endif
2990 if (m!=2) switch (ch) {
2991 case '#':
2992 if (dest->length == 0 && !dest->quote) {
2993 while(ch=b_peek(input),ch!=EOF && ch!='\n') { b_getch(input); }
2994 } else {
2995 b_addqchr(dest, ch, dest->quote);
2996 }
2997 break;
2998 case '\\':
2999 if (next == EOF) {
3000 syntax();
3001 return 1;
3002 }
3003 b_addqchr(dest, '\\', dest->quote);
3004 b_addqchr(dest, b_getch(input), dest->quote);
3005 break;
3006 case '$':
3007 if (handle_dollar(dest, ctx, input)!=0) return 1;
3008 break;
3009 case '\'':
3010 dest->nonnull = 1;
3011 while(ch=b_getch(input),ch!=EOF && ch!='\'') {
3012#ifdef __U_BOOT__
3013 if(input->__promptme == 0) return 1;
3014#endif
3015 b_addchr(dest,ch);
3016 }
3017 if (ch==EOF) {
3018 syntax();
3019 return 1;
3020 }
3021 break;
3022 case '"':
3023 dest->nonnull = 1;
3024 dest->quote = !dest->quote;
3025 break;
3026#ifndef __U_BOOT__
3027 case '`':
3028 process_command_subs(dest, ctx, input, '`');
3029 break;
3030 case '>':
3031 redir_fd = redirect_opt_num(dest);
3032 done_word(dest, ctx);
3033 redir_style=REDIRECT_OVERWRITE;
3034 if (next == '>') {
3035 redir_style=REDIRECT_APPEND;
3036 b_getch(input);
3037 } else if (next == '(') {
3038 syntax();
3039 return 1;
3040 }
3041 setup_redirect(ctx, redir_fd, redir_style, input);
3042 break;
3043 case '<':
3044 redir_fd = redirect_opt_num(dest);
3045 done_word(dest, ctx);
3046 redir_style=REDIRECT_INPUT;
3047 if (next == '<') {
3048 redir_style=REDIRECT_HEREIS;
3049 b_getch(input);
3050 } else if (next == '>') {
3051 redir_style=REDIRECT_IO;
3052 b_getch(input);
3053 } else if (next == '(') {
3054 syntax();
3055 return 1;
3056 }
3057 setup_redirect(ctx, redir_fd, redir_style, input);
3058 break;
3059#endif
3060 case ';':
3061 done_word(dest, ctx);
3062 done_pipe(ctx,PIPE_SEQ);
3063 break;
3064 case '&':
3065 done_word(dest, ctx);
3066 if (next=='&') {
3067 b_getch(input);
3068 done_pipe(ctx,PIPE_AND);
3069 } else {
3070#ifndef __U_BOOT__
3071 done_pipe(ctx,PIPE_BG);
3072#else
3073 syntax_err();
3074 return 1;
3075#endif
3076 }
3077 break;
3078 case '|':
3079 done_word(dest, ctx);
3080 if (next=='|') {
3081 b_getch(input);
3082 done_pipe(ctx,PIPE_OR);
3083 } else {
3084
3085
3086
3087#ifndef __U_BOOT__
3088 done_command(ctx);
3089#else
3090 syntax_err();
3091 return 1;
3092#endif
3093 }
3094 break;
3095#ifndef __U_BOOT__
3096 case '(':
3097 case '{':
3098 if (parse_group(dest, ctx, input, ch)!=0) return 1;
3099 break;
3100 case ')':
3101 case '}':
3102 syntax();
3103 return 1;
3104 break;
3105#endif
3106 case SUBSTED_VAR_SYMBOL:
3107 dest->nonnull = 1;
3108 while (ch = b_getch(input), ch != EOF &&
3109 ch != SUBSTED_VAR_SYMBOL) {
3110 debug_printf("subst, pass=%d\n", ch);
3111 if (input->__promptme == 0)
3112 return 1;
3113 b_addchr(dest, ch);
3114 }
3115 debug_printf("subst, term=%d\n", ch);
3116 if (ch == EOF) {
3117 syntax();
3118 return 1;
3119 }
3120 break;
3121 default:
3122 syntax();
3123 return 1;
3124 }
3125 }
3126 }
3127
3128
3129
3130
3131
3132
3133
3134
3135 debug_printf("leaving parse_stream (EOF)\n");
3136 if (end_trigger != '\0') return -1;
3137 return 0;
3138}
3139
3140static void mapset(const unsigned char *set, int code)
3141{
3142 const unsigned char *s;
3143 for (s=set; *s; s++) map[*s] = code;
3144}
3145
3146static void update_ifs_map(void)
3147{
3148
3149 ifs = (uchar *)env_get("IFS");
3150 if (ifs == NULL) ifs=(uchar *)" \t\n";
3151
3152
3153
3154
3155
3156
3157 memset(map,0,sizeof(map));
3158#ifndef __U_BOOT__
3159 mapset((uchar *)"\\$'\"`", 3);
3160 mapset((uchar *)"<>;&|(){}#", 1);
3161#else
3162 {
3163 uchar subst[2] = {SUBSTED_VAR_SYMBOL, 0};
3164 mapset(subst, 3);
3165 }
3166 mapset((uchar *)"\\$'\"", 3);
3167 mapset((uchar *)";&|#", 1);
3168#endif
3169 mapset(ifs, 2);
3170}
3171
3172
3173
3174static int parse_stream_outer(struct in_str *inp, int flag)
3175{
3176
3177 struct p_context ctx;
3178 o_string temp=NULL_O_STRING;
3179 int rcode;
3180#ifdef __U_BOOT__
3181 int code = 1;
3182#endif
3183 do {
3184 ctx.type = flag;
3185 initialize_context(&ctx);
3186 update_ifs_map();
3187 if (!(flag & FLAG_PARSE_SEMICOLON) || (flag & FLAG_REPARSING)) mapset((uchar *)";$&|", 0);
3188 inp->promptmode=1;
3189 rcode = parse_stream(&temp, &ctx, inp,
3190 flag & FLAG_CONT_ON_NEWLINE ? -1 : '\n');
3191#ifdef __U_BOOT__
3192 if (rcode == 1) flag_repeat = 0;
3193#endif
3194 if (rcode != 1 && ctx.old_flag != 0) {
3195 syntax();
3196#ifdef __U_BOOT__
3197 flag_repeat = 0;
3198#endif
3199 }
3200 if (rcode != 1 && ctx.old_flag == 0) {
3201 done_word(&temp, &ctx);
3202 done_pipe(&ctx,PIPE_SEQ);
3203#ifndef __U_BOOT__
3204 run_list(ctx.list_head);
3205#else
3206 code = run_list(ctx.list_head);
3207 if (code == -2) {
3208 b_free(&temp);
3209 code = 0;
3210
3211 if (inp->peek == file_peek) {
3212 printf("exit not allowed from main input shell.\n");
3213 continue;
3214 }
3215 break;
3216 }
3217 if (code == -1)
3218 flag_repeat = 0;
3219#endif
3220 } else {
3221 if (ctx.old_flag != 0) {
3222 free(ctx.stack);
3223 b_reset(&temp);
3224 }
3225#ifdef __U_BOOT__
3226 if (inp->__promptme == 0) printf("<INTERRUPT>\n");
3227 inp->__promptme = 1;
3228#endif
3229 temp.nonnull = 0;
3230 temp.quote = 0;
3231 inp->p = NULL;
3232 free_pipe_list(ctx.list_head,0);
3233 }
3234 b_free(&temp);
3235
3236 } while (rcode != -1 && !(flag & FLAG_EXIT_FROM_LOOP) &&
3237 (inp->peek != static_peek || b_peek(inp)));
3238#ifndef __U_BOOT__
3239 return 0;
3240#else
3241 return (code != 0) ? 1 : 0;
3242#endif
3243}
3244
3245#ifndef __U_BOOT__
3246static int parse_string_outer(const char *s, int flag)
3247#else
3248int parse_string_outer(const char *s, int flag)
3249#endif
3250{
3251 struct in_str input;
3252#ifdef __U_BOOT__
3253 char *p = NULL;
3254 int rcode;
3255 if (!s)
3256 return 1;
3257 if (!*s)
3258 return 0;
3259 if (!(p = strchr(s, '\n')) || *++p) {
3260 p = xmalloc(strlen(s) + 2);
3261 strcpy(p, s);
3262 strcat(p, "\n");
3263 setup_string_in_str(&input, p);
3264 rcode = parse_stream_outer(&input, flag);
3265 free(p);
3266 return rcode;
3267 } else {
3268#endif
3269 setup_string_in_str(&input, s);
3270 return parse_stream_outer(&input, flag);
3271#ifdef __U_BOOT__
3272 }
3273#endif
3274}
3275
3276#ifndef __U_BOOT__
3277static int parse_file_outer(FILE *f)
3278#else
3279int parse_file_outer(void)
3280#endif
3281{
3282 int rcode;
3283 struct in_str input;
3284#ifndef __U_BOOT__
3285 setup_file_in_str(&input, f);
3286#else
3287 setup_file_in_str(&input);
3288#endif
3289 rcode = parse_stream_outer(&input, FLAG_PARSE_SEMICOLON);
3290 return rcode;
3291}
3292
3293#ifdef __U_BOOT__
3294#ifdef CONFIG_NEEDS_MANUAL_RELOC
3295static void u_boot_hush_reloc(void)
3296{
3297 unsigned long addr;
3298 struct reserved_combo *r;
3299
3300 for (r=reserved_list; r<reserved_list+NRES; r++) {
3301 addr = (ulong) (r->literal) + gd->reloc_off;
3302 r->literal = (char *)addr;
3303 }
3304}
3305#endif
3306
3307int u_boot_hush_start(void)
3308{
3309 if (top_vars == NULL) {
3310 top_vars = malloc(sizeof(struct variables));
3311 top_vars->name = "HUSH_VERSION";
3312 top_vars->value = "0.01";
3313 top_vars->next = NULL;
3314 top_vars->flg_export = 0;
3315 top_vars->flg_read_only = 1;
3316#ifdef CONFIG_NEEDS_MANUAL_RELOC
3317 u_boot_hush_reloc();
3318#endif
3319 }
3320 return 0;
3321}
3322
3323static void *xmalloc(size_t size)
3324{
3325 void *p = NULL;
3326
3327 if (!(p = malloc(size))) {
3328 printf("ERROR : xmalloc failed\n");
3329 for(;;);
3330 }
3331 return p;
3332}
3333
3334static void *xrealloc(void *ptr, size_t size)
3335{
3336 void *p = NULL;
3337
3338 if (!(p = realloc(ptr, size))) {
3339 printf("ERROR : xrealloc failed\n");
3340 for(;;);
3341 }
3342 return p;
3343}
3344#endif
3345
3346#ifndef __U_BOOT__
3347
3348
3349
3350static void setup_job_control(void)
3351{
3352 static pid_t shell_pgrp;
3353
3354 while (tcgetpgrp (shell_terminal) != (shell_pgrp = getpgrp ()))
3355 kill (- shell_pgrp, SIGTTIN);
3356
3357
3358 signal(SIGINT, SIG_IGN);
3359 signal(SIGQUIT, SIG_IGN);
3360 signal(SIGTERM, SIG_IGN);
3361 signal(SIGTSTP, SIG_IGN);
3362 signal(SIGTTIN, SIG_IGN);
3363 signal(SIGTTOU, SIG_IGN);
3364 signal(SIGCHLD, SIG_IGN);
3365
3366
3367 setsid();
3368 shell_pgrp = getpid ();
3369 setpgid (shell_pgrp, shell_pgrp);
3370
3371
3372 tcsetpgrp(shell_terminal, shell_pgrp);
3373}
3374
3375int hush_main(int argc, char * const *argv)
3376{
3377 int opt;
3378 FILE *input;
3379 char **e = environ;
3380
3381
3382 global_argc = argc;
3383 global_argv = argv;
3384
3385
3386
3387
3388 ifs = NULL;
3389
3390 fake_mode = 0;
3391 interactive = 0;
3392 close_me_head = NULL;
3393 last_bg_pid = 0;
3394 job_list = NULL;
3395 last_jobid = 0;
3396
3397
3398 set_cwd();
3399#ifdef CONFIG_FEATURE_COMMAND_EDITING
3400 cmdedit_set_initial_prompt();
3401#else
3402 PS1 = NULL;
3403#endif
3404 PS2 = "> ";
3405
3406
3407
3408 if (e) {
3409 for (; *e; e++)
3410 set_local_var(*e, 2);
3411 }
3412
3413 last_return_code=EXIT_SUCCESS;
3414
3415
3416 if (argv[0] && argv[0][0] == '-') {
3417 debug_printf("\nsourcing /etc/profile\n");
3418 if ((input = fopen("/etc/profile", "r")) != NULL) {
3419 mark_open(fileno(input));
3420 parse_file_outer(input);
3421 mark_closed(fileno(input));
3422 fclose(input);
3423 }
3424 }
3425 input=stdin;
3426
3427 while ((opt = getopt(argc, argv, "c:xif")) > 0) {
3428 switch (opt) {
3429 case 'c':
3430 {
3431 global_argv = argv+optind;
3432 global_argc = argc-optind;
3433 opt = parse_string_outer(optarg, FLAG_PARSE_SEMICOLON);
3434 goto final_return;
3435 }
3436 break;
3437 case 'i':
3438 interactive++;
3439 break;
3440 case 'f':
3441 fake_mode++;
3442 break;
3443 default:
3444#ifndef BB_VER
3445 fprintf(stderr, "Usage: sh [FILE]...\n"
3446 " or: sh -c command [args]...\n\n");
3447 exit(EXIT_FAILURE);
3448#else
3449 show_usage();
3450#endif
3451 }
3452 }
3453
3454
3455
3456
3457
3458
3459
3460 if (argv[optind]==NULL && input==stdin &&
3461 isatty(fileno(stdin)) && isatty(fileno(stdout))) {
3462 interactive++;
3463 }
3464
3465 debug_printf("\ninteractive=%d\n", interactive);
3466 if (interactive) {
3467
3468#ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
3469 printf( "\n\n" BB_BANNER " hush - the humble shell v0.01 (testing)\n");
3470 printf( "Enter 'help' for a list of built-in commands.\n\n");
3471#endif
3472 setup_job_control();
3473 }
3474
3475 if (argv[optind]==NULL) {
3476 opt=parse_file_outer(stdin);
3477 goto final_return;
3478 }
3479
3480 debug_printf("\nrunning script '%s'\n", argv[optind]);
3481 global_argv = argv+optind;
3482 global_argc = argc-optind;
3483 input = xfopen(argv[optind], "r");
3484 opt = parse_file_outer(input);
3485
3486#ifdef CONFIG_FEATURE_CLEAN_UP
3487 fclose(input);
3488 if (cwd && cwd != unknown)
3489 free((char*)cwd);
3490 {
3491 struct variables *cur, *tmp;
3492 for(cur = top_vars; cur; cur = tmp) {
3493 tmp = cur->next;
3494 if (!cur->flg_read_only) {
3495 free(cur->name);
3496 free(cur->value);
3497 free(cur);
3498 }
3499 }
3500 }
3501#endif
3502
3503final_return:
3504 return(opt?opt:last_return_code);
3505}
3506#endif
3507
3508static char *insert_var_value(char *inp)
3509{
3510 return insert_var_value_sub(inp, 0);
3511}
3512
3513static char *insert_var_value_sub(char *inp, int tag_subst)
3514{
3515 int res_str_len = 0;
3516 int len;
3517 int done = 0;
3518 char *p, *p1, *res_str = NULL;
3519
3520 while ((p = strchr(inp, SPECIAL_VAR_SYMBOL))) {
3521
3522 if (p != inp) {
3523
3524 len = p - inp;
3525 res_str = xrealloc(res_str, (res_str_len + len));
3526 strncpy((res_str + res_str_len), inp, len);
3527 res_str_len += len;
3528 }
3529 inp = ++p;
3530
3531 p = strchr(inp, SPECIAL_VAR_SYMBOL);
3532 *p = '\0';
3533
3534 if ((p1 = lookup_param(inp))) {
3535 if (tag_subst)
3536 len = res_str_len + strlen(p1) + 2;
3537 else
3538 len = res_str_len + strlen(p1);
3539 res_str = xrealloc(res_str, (1 + len));
3540 if (tag_subst) {
3541
3542
3543
3544
3545 strcpy((res_str + res_str_len + 1), p1);
3546
3547
3548
3549
3550
3551 res_str[res_str_len] = SUBSTED_VAR_SYMBOL;
3552 res_str[res_str_len + 1 + strlen(p1)] =
3553 SUBSTED_VAR_SYMBOL;
3554 } else
3555
3556
3557
3558
3559 strcpy((res_str + res_str_len), p1);
3560
3561 res_str_len = len;
3562 }
3563 *p = SPECIAL_VAR_SYMBOL;
3564 inp = ++p;
3565 done = 1;
3566 }
3567 if (done) {
3568 res_str = xrealloc(res_str, (1 + res_str_len + strlen(inp)));
3569 strcpy((res_str + res_str_len), inp);
3570 while ((p = strchr(res_str, '\n'))) {
3571 *p = ' ';
3572 }
3573 }
3574 return (res_str == NULL) ? inp : res_str;
3575}
3576
3577static char **make_list_in(char **inp, char *name)
3578{
3579 int len, i;
3580 int name_len = strlen(name);
3581 int n = 0;
3582 char **list;
3583 char *p1, *p2, *p3;
3584
3585
3586 list = xmalloc(sizeof(*list));
3587 for (i = 0; inp[i]; i++) {
3588 p3 = insert_var_value(inp[i]);
3589 p1 = p3;
3590 while (*p1) {
3591 if (*p1 == ' ') {
3592 p1++;
3593 continue;
3594 }
3595 if ((p2 = strchr(p1, ' '))) {
3596 len = p2 - p1;
3597 } else {
3598 len = strlen(p1);
3599 p2 = p1 + len;
3600 }
3601
3602
3603 list = xrealloc(list, sizeof(*list) * (n + 2));
3604 list[n] = xmalloc(2 + name_len + len);
3605 strcpy(list[n], name);
3606 strcat(list[n], "=");
3607 strncat(list[n], p1, len);
3608 list[n++][name_len + len + 1] = '\0';
3609 p1 = p2;
3610 }
3611 if (p3 != inp[i]) free(p3);
3612 }
3613 list[n] = NULL;
3614 return list;
3615}
3616
3617
3618
3619
3620
3621
3622static char *make_string(char **inp, int *nonnull)
3623{
3624 char *p;
3625 char *str = NULL;
3626 int n;
3627 int len = 2;
3628 char *noeval_str;
3629 int noeval = 0;
3630
3631 noeval_str = get_local_var("HUSH_NO_EVAL");
3632 if (noeval_str != NULL && *noeval_str != '0' && *noeval_str != '\0')
3633 noeval = 1;
3634 for (n = 0; inp[n]; n++) {
3635 p = insert_var_value_sub(inp[n], noeval);
3636 str = xrealloc(str, (len + strlen(p) + (2 * nonnull[n])));
3637 if (n) {
3638 strcat(str, " ");
3639 } else {
3640 *str = '\0';
3641 }
3642 if (nonnull[n])
3643 strcat(str, "'");
3644 strcat(str, p);
3645 if (nonnull[n])
3646 strcat(str, "'");
3647 len = strlen(str) + 3;
3648 if (p != inp[n]) free(p);
3649 }
3650 len = strlen(str);
3651 *(str + len) = '\n';
3652 *(str + len + 1) = '\0';
3653 return str;
3654}
3655
3656#ifdef __U_BOOT__
3657static int do_showvar(struct cmd_tbl *cmdtp, int flag, int argc,
3658 char *const argv[])
3659{
3660 int i, k;
3661 int rcode = 0;
3662 struct variables *cur;
3663
3664 if (argc == 1) {
3665 for (cur = top_vars; cur; cur = cur->next) {
3666 printf ("%s=%s\n", cur->name, cur->value);
3667 if (ctrlc ()) {
3668 puts ("\n ** Abort\n");
3669 return 1;
3670 }
3671 }
3672 return 0;
3673 }
3674 for (i = 1; i < argc; ++i) {
3675 char *name = argv[i];
3676
3677 k = -1;
3678 for (cur = top_vars; cur; cur = cur->next) {
3679 if(strcmp (cur->name, name) == 0) {
3680 k = 0;
3681 printf ("%s=%s\n", cur->name, cur->value);
3682 }
3683 if (ctrlc ()) {
3684 puts ("\n ** Abort\n");
3685 return 1;
3686 }
3687 }
3688 if (k < 0) {
3689 printf ("## Error: \"%s\" not defined\n", name);
3690 rcode ++;
3691 }
3692 }
3693 return rcode;
3694}
3695
3696U_BOOT_CMD(
3697 showvar, CONFIG_SYS_MAXARGS, 1, do_showvar,
3698 "print local hushshell variables",
3699 "\n - print values of all hushshell variables\n"
3700 "showvar name ...\n"
3701 " - print value of hushshell variable 'name'"
3702);
3703
3704#endif
3705
3706