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26
27
28#include "busybox.h"
29
30#if !(defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) \
31 || defined(__APPLE__) \
32 )
33# include <malloc.h>
34#endif
35
36
37#define PROTOTYPES
38#include "applets.h"
39#undef PROTOTYPES
40
41
42#include "applet_tables.h"
43
44#ifdef SINGLE_APPLET_MAIN
45# undef ENABLE_FEATURE_INDIVIDUAL
46# define ENABLE_FEATURE_INDIVIDUAL 1
47# undef IF_FEATURE_INDIVIDUAL
48# define IF_FEATURE_INDIVIDUAL(...) __VA_ARGS__
49#endif
50
51#include "usage_compressed.h"
52
53#if ENABLE_FEATURE_SH_EMBEDDED_SCRIPTS
54# define DEFINE_SCRIPT_DATA 1
55# include "embedded_scripts.h"
56#else
57# define NUM_SCRIPTS 0
58#endif
59#if NUM_SCRIPTS > 0
60# include "bb_archive.h"
61static const char packed_scripts[] ALIGN1 = { PACKED_SCRIPTS };
62#endif
63
64
65
66
67
68
69
70
71
72
73
74
75
76#if UNPACKED_USAGE_LENGTH < 4*1024 \
77 && !(ENABLE_FEATURE_SEAMLESS_BZ2 && ENABLE_TAR) \
78 && !(ENABLE_FEATURE_SEAMLESS_BZ2 && ENABLE_MODPROBE) \
79 && !(ENABLE_FEATURE_SEAMLESS_BZ2 && ENABLE_INSMOD) \
80 && !(ENABLE_FEATURE_SEAMLESS_BZ2 && ENABLE_DEPMOD) \
81 && !(ENABLE_FEATURE_SEAMLESS_BZ2 && ENABLE_MAN) \
82 && !ENABLE_BUNZIP2 \
83 && !ENABLE_BZCAT
84# undef ENABLE_FEATURE_COMPRESS_USAGE
85# define ENABLE_FEATURE_COMPRESS_USAGE 0
86#endif
87
88
89unsigned FAST_FUNC string_array_len(char **argv)
90{
91 char **start = argv;
92
93 while (*argv)
94 argv++;
95
96 return argv - start;
97}
98
99
100#if ENABLE_SHOW_USAGE && !ENABLE_FEATURE_COMPRESS_USAGE
101static const char usage_messages[] ALIGN1 = UNPACKED_USAGE;
102#else
103# define usage_messages 0
104#endif
105
106#if ENABLE_FEATURE_COMPRESS_USAGE
107
108static const char packed_usage[] ALIGN1 = { PACKED_USAGE };
109# include "bb_archive.h"
110# define unpack_usage_messages() \
111 unpack_bz2_data(packed_usage, sizeof(packed_usage), sizeof(UNPACKED_USAGE))
112# define dealloc_usage_messages(s) free(s)
113
114#else
115
116# define unpack_usage_messages() usage_messages
117# define dealloc_usage_messages(s) ((void)(s))
118
119#endif
120
121
122void FAST_FUNC bb_show_usage(void)
123{
124 if (ENABLE_SHOW_USAGE) {
125#ifdef SINGLE_APPLET_STR
126
127 const char *usage_string = unpack_usage_messages();
128
129 if (usage_string) {
130 if (*usage_string == '\b') {
131 full_write2_str("No help available\n");
132 } else {
133 full_write2_str("Usage: "SINGLE_APPLET_STR" ");
134 full_write2_str(usage_string);
135 full_write2_str("\n");
136 }
137 if (ENABLE_FEATURE_CLEAN_UP)
138 dealloc_usage_messages((char*)usage_string);
139 }
140#else
141 const char *p;
142 const char *usage_string = p = unpack_usage_messages();
143 int ap = find_applet_by_name(applet_name);
144
145 if (ap < 0 || usage_string == NULL)
146 xfunc_die();
147 while (ap) {
148 while (*p++) continue;
149 ap--;
150 }
151 full_write2_str(bb_banner);
152 full_write2_str(" multi-call binary.\n");
153 if (*p == '\b')
154 full_write2_str("\nNo help available\n");
155 else {
156 full_write2_str("\nUsage: ");
157 full_write2_str(applet_name);
158 if (p[0]) {
159 if (p[0] != '\n')
160 full_write2_str(" ");
161 full_write2_str(p);
162 }
163 full_write2_str("\n");
164 }
165 if (ENABLE_FEATURE_CLEAN_UP)
166 dealloc_usage_messages((char*)usage_string);
167#endif
168 }
169 xfunc_die();
170}
171
172int FAST_FUNC find_applet_by_name(const char *name)
173{
174 unsigned i, max;
175 int j;
176 const char *p;
177
178
179
180
181#if 0
182 uint32_t n32;
183
184
185 if (name[0] == '\0')
186 return -1;
187 if (name[1] == '\0') {
188 if (!ENABLE_TEST)
189 return -1;
190 if (name[0] != ']')
191 return -1;
192
193 return 0;
194 }
195#endif
196
197 p = applet_names;
198 i = 0;
199#if KNOWN_APPNAME_OFFSETS <= 0
200 max = NUM_APPLETS;
201#else
202 max = NUM_APPLETS * KNOWN_APPNAME_OFFSETS;
203 for (j = ARRAY_SIZE(applet_nameofs)-1; j >= 0; j--) {
204 const char *pp = applet_names + applet_nameofs[j];
205 if (strcmp(name, pp) >= 0) {
206
207 p = pp;
208 i = max - NUM_APPLETS;
209 break;
210 }
211 max -= NUM_APPLETS;
212 }
213 max /= (unsigned)KNOWN_APPNAME_OFFSETS;
214 i /= (unsigned)KNOWN_APPNAME_OFFSETS;
215
216#endif
217
218
219
220#if 0
221
222 if (ENABLE_TEST && LONE_CHAR(p, '['))
223 i++, p += 2;
224
225
226
227 n32 = (name[0] << 0) | (name[1] << 8) | (name[2] << 16);
228 while (i < max) {
229 uint32_t p32;
230 char ch;
231
232
233 move_from_unaligned32(p32, p);
234 p += 3;
235 if ((p32 & 0x00ffffff) != n32) {
236
237 i++;
238 if ((p32 & 0x00ff0000) == '\0')
239 continue;
240 p++;
241 if ((p32 & 0xff000000) == '\0')
242 continue;
243
244 while (*p++ != '\0')
245 continue;
246 continue;
247 }
248
249
250 if ((p32 & 0x00ff0000) == '\0') {
251
252
253 return i;
254 }
255
256 ch = (p32 >> 24);
257 j = 3;
258 while (ch == name[j]) {
259 if (ch == '\0') {
260
261 return i;
262 }
263 ch = *++p;
264 j++;
265 }
266
267 while (ch != '\0')
268 ch = *++p;
269 p++;
270 i++;
271 }
272 return -1;
273#else
274 while (i < max) {
275 char ch;
276 j = 0;
277
278 while ((ch = *p) == name[j]) {
279 if (ch == '\0') {
280
281 return i;
282 }
283 p++;
284 j++;
285 }
286
287
288
289
290 while (ch != '\0')
291 ch = *++p;
292 p++;
293 i++;
294 }
295 return -1;
296#endif
297}
298
299
300void lbb_prepare(const char *applet
301 IF_FEATURE_INDIVIDUAL(, char **argv))
302 MAIN_EXTERNALLY_VISIBLE;
303void lbb_prepare(const char *applet
304 IF_FEATURE_INDIVIDUAL(, char **argv))
305{
306#ifdef __GLIBC__
307 (*(int **)&bb_errno) = __errno_location();
308 barrier();
309#endif
310 applet_name = applet;
311
312 if (ENABLE_LOCALE_SUPPORT)
313 setlocale(LC_ALL, "");
314
315#if ENABLE_FEATURE_INDIVIDUAL
316
317
318 if (argv[1]
319 && !argv[2]
320 && strcmp(argv[1], "--help") == 0
321 && !is_prefixed_with(applet, "busybox")
322 ) {
323
324
325 if (!ENABLE_TEST || strcmp(applet_name, "test") != 0)
326 bb_show_usage();
327 }
328#endif
329}
330
331
332
333
334
335
336
337
338
339
340const char *applet_name;
341#if !BB_MMU
342bool re_execed;
343#endif
344
345
346
347#if !defined(SINGLE_APPLET_MAIN)
348
349IF_FEATURE_SUID(static uid_t ruid;)
350
351# if ENABLE_FEATURE_SUID_CONFIG
352
353static struct suid_config_t {
354
355 struct suid_config_t *m_next;
356 struct bb_uidgid_t m_ugid;
357 int m_applet;
358 mode_t m_mode;
359} *suid_config;
360
361static bool suid_cfg_readable;
362
363
364static char *get_trimmed_slice(char *s, char *e)
365{
366
367
368
369 while (e-- > s) {
370 if (!isspace(*e)) {
371 break;
372 }
373 }
374 e[1] = '\0';
375
376
377
378 return skip_whitespace(s);
379}
380
381static void parse_config_file(void)
382{
383
384 static const char config_file[] ALIGN1 = "/etc/busybox.conf";
385
386 struct suid_config_t *sct_head;
387 int applet_no;
388 FILE *f;
389 const char *errmsg;
390 unsigned lc;
391 smallint section;
392 struct stat st;
393
394 ruid = getuid();
395 if (ruid == 0)
396 return;
397
398 if ((stat(config_file, &st) != 0)
399 || !S_ISREG(st.st_mode)
400 || (st.st_uid != 0)
401 || (st.st_mode & (S_IWGRP | S_IWOTH))
402 || !(f = fopen_for_read(config_file))
403 ) {
404 return;
405 }
406
407 suid_cfg_readable = 1;
408 sct_head = NULL;
409 section = lc = 0;
410
411 while (1) {
412 char buffer[256];
413 char *s;
414
415 if (!fgets(buffer, sizeof(buffer), f)) {
416
417
418
419
420
421 fclose(f);
422 suid_config = sct_head;
423 return;
424 }
425
426 s = buffer;
427 lc++;
428
429
430
431
432
433
434
435
436
437 if (!strchr(s, '\n') && !feof(f)) {
438 errmsg = "line too long";
439 goto pe_label;
440 }
441
442
443
444 s = get_trimmed_slice(s, strchrnul(s, '#'));
445 if (!*s) {
446 continue;
447 }
448
449
450
451 if (*s == '[') {
452
453
454
455 char *e = strchr(s, ']');
456 if (!e
457 || e[1]
458 || !*(s = get_trimmed_slice(s+1, e))
459 ) {
460 errmsg = "section header";
461 goto pe_label;
462 }
463
464
465
466
467
468
469 if (strcasecmp(s, "SUID") == 0) {
470 section = 1;
471 continue;
472 }
473 section = -1;
474 continue;
475 }
476
477
478
479 if (section == 1) {
480
481
482
483
484
485
486 char *e = strchr(s, '=');
487 if (e) {
488 s = get_trimmed_slice(s, e);
489 }
490 if (!e || !*s) {
491 errmsg = "keyword";
492 goto pe_label;
493 }
494
495
496
497
498
499 applet_no = find_applet_by_name(s);
500 if (applet_no >= 0) {
501 unsigned i;
502 struct suid_config_t *sct;
503
504
505
506
507
508 sct = xzalloc(sizeof(*sct));
509 sct->m_applet = applet_no;
510
511 sct->m_next = sct_head;
512 sct_head = sct;
513
514
515
516 e = skip_whitespace(e+1);
517
518 for (i = 0; i < 3; i++) {
519
520
521
522
523 static const char mode_chars[] ALIGN1 = "Ssx-" "Ssx-" "x-xx";
524 static const unsigned short mode_mask[] ALIGN2 = {
525 S_ISUID, S_ISUID|S_IXUSR, S_IXUSR, 0,
526 S_ISGID, S_ISGID|S_IXGRP, S_IXGRP, 0,
527 S_IXOTH, 0
528 };
529 const char *q = strchrnul(mode_chars + 4*i, *e);
530 unsigned idx = q - (mode_chars + 4*i);
531 if (idx > 3) {
532 errmsg = "mode";
533 goto pe_label;
534 }
535 sct->m_mode |= mode_mask[q - mode_chars];
536 e++;
537 }
538
539
540
541 s = skip_whitespace(e);
542
543 if (*s) {
544
545 if ((s == e) || !(e = strchr(s, '.'))) {
546 errmsg = "uid.gid";
547 goto pe_label;
548 }
549 *e = ':';
550 if (get_uidgid(&sct->m_ugid, s) == 0) {
551 errmsg = "unknown user/group";
552 goto pe_label;
553 }
554 }
555 }
556 continue;
557 }
558
559
560
561
562
563
564
565
566 if (!section) {
567 errmsg = "keyword outside section";
568 goto pe_label;
569 }
570 }
571
572 pe_label:
573 fclose(f);
574 bb_error_msg("parse error in %s, line %u: %s", config_file, lc, errmsg);
575
576
577 llist_free((llist_t*)sct_head, NULL);
578}
579# else
580static inline void parse_config_file(void)
581{
582 IF_FEATURE_SUID(ruid = getuid();)
583}
584# endif
585
586
587# if ENABLE_FEATURE_SUID && NUM_APPLETS > 0
588# if ENABLE_FEATURE_SUID_CONFIG
589
590static int ingroup(uid_t u, gid_t g)
591{
592 struct group *grp = getgrgid(g);
593 if (grp) {
594 char **mem;
595 for (mem = grp->gr_mem; *mem; mem++) {
596 struct passwd *pwd = getpwnam(*mem);
597 if (pwd && (pwd->pw_uid == u))
598 return 1;
599 }
600 }
601 return 0;
602}
603# endif
604
605static void check_suid(int applet_no)
606{
607 gid_t rgid;
608
609 if (ruid == 0)
610 return;
611 rgid = getgid();
612
613# if ENABLE_FEATURE_SUID_CONFIG
614 if (suid_cfg_readable) {
615 uid_t uid;
616 struct suid_config_t *sct;
617 mode_t m;
618
619 for (sct = suid_config; sct; sct = sct->m_next) {
620 if (sct->m_applet == applet_no)
621 goto found;
622 }
623 goto check_need_suid;
624 found:
625
626 m = sct->m_mode;
627 if (sct->m_ugid.uid == ruid)
628
629 m >>= 6;
630 else if ((sct->m_ugid.gid == rgid) || ingroup(ruid, sct->m_ugid.gid))
631
632 m >>= 3;
633 if (!(m & S_IXOTH))
634 bb_error_msg_and_die("you have no permission to run this applet");
635
636
637
638
639
640
641
642 if (sct->m_mode & S_ISGID)
643 rgid = sct->m_ugid.gid;
644
645 if (setresgid(-1, rgid, rgid))
646 bb_perror_msg_and_die("setresgid");
647
648
649
650
651 uid = ruid;
652 if (sct->m_mode & S_ISUID)
653 uid = sct->m_ugid.uid;
654
655 if (setresuid(-1, uid, uid))
656 bb_perror_msg_and_die("setresuid");
657
658 goto ret;
659 }
660# if !ENABLE_FEATURE_SUID_CONFIG_QUIET
661 {
662 static bool onetime = 0;
663
664 if (!onetime) {
665 onetime = 1;
666 bb_error_msg("using fallback suid method");
667 }
668 }
669# endif
670 check_need_suid:
671# endif
672 if (APPLET_SUID(applet_no) == BB_SUID_REQUIRE) {
673
674
675 if (geteuid())
676 bb_error_msg_and_die("must be suid to work properly");
677 } else if (APPLET_SUID(applet_no) == BB_SUID_DROP) {
678
679
680
681
682
683
684
685
686
687
688
689
690
691 setgid(rgid);
692 setuid(ruid);
693 }
694# if ENABLE_FEATURE_SUID_CONFIG
695 ret: ;
696 llist_free((llist_t*)suid_config, NULL);
697# endif
698}
699# else
700# define check_suid(x) ((void)0)
701# endif
702
703
704# if ENABLE_FEATURE_INSTALLER
705static const char usr_bin [] ALIGN1 = "/usr/bin/";
706static const char usr_sbin[] ALIGN1 = "/usr/sbin/";
707static const char *const install_dir[] = {
708 &usr_bin [8],
709 &usr_bin [4],
710 &usr_sbin[4]
711# if !ENABLE_INSTALL_NO_USR
712 ,usr_bin
713 ,usr_sbin
714# endif
715};
716
717
718static void install_links(const char *busybox, int use_symbolic_links,
719 char *custom_install_dir)
720{
721
722
723
724 int (*lf)(const char *, const char *);
725 char *fpc;
726 const char *appname = applet_names;
727 unsigned i;
728 int rc;
729
730 lf = link;
731 if (use_symbolic_links)
732 lf = symlink;
733
734 for (i = 0; i < ARRAY_SIZE(applet_main); i++) {
735 fpc = concat_path_file(
736 custom_install_dir ? custom_install_dir : install_dir[APPLET_INSTALL_LOC(i)],
737 appname);
738
739
740 rc = lf(busybox, fpc);
741 if (rc != 0 && errno != EEXIST) {
742 bb_simple_perror_msg(fpc);
743 }
744 free(fpc);
745 while (*appname++ != '\0')
746 continue;
747 }
748}
749# elif ENABLE_BUSYBOX
750static void install_links(const char *busybox UNUSED_PARAM,
751 int use_symbolic_links UNUSED_PARAM,
752 char *custom_install_dir UNUSED_PARAM)
753{
754}
755# endif
756
757static void run_applet_and_exit(const char *name, char **argv) NORETURN;
758
759# if NUM_SCRIPTS > 0
760static int find_script_by_name(const char *name)
761{
762 int i;
763 int applet = find_applet_by_name(name);
764
765 if (applet >= 0) {
766 for (i = 0; i < NUM_SCRIPTS; ++i)
767 if (applet_numbers[i] == applet)
768 return i;
769 }
770 return -1;
771}
772
773int scripted_main(int argc UNUSED_PARAM, char **argv) MAIN_EXTERNALLY_VISIBLE;
774int scripted_main(int argc UNUSED_PARAM, char **argv)
775{
776 int script = find_script_by_name(applet_name);
777 if (script >= 0)
778#if ENABLE_ASH || ENABLE_SH_IS_ASH || ENABLE_BASH_IS_ASH
779 exit(ash_main(-script - 1, argv));
780#elif ENABLE_HUSH || ENABLE_SH_IS_HUSH || ENABLE_BASH_IS_HUSH
781 exit(hush_main(-script - 1, argv));
782#else
783 return 1;
784#endif
785 return 0;
786}
787
788char* FAST_FUNC
789get_script_content(unsigned n)
790{
791 char *t = unpack_bz2_data(packed_scripts, sizeof(packed_scripts),
792 UNPACKED_SCRIPTS_LENGTH);
793 if (t) {
794 while (n != 0) {
795 while (*t++ != '\0')
796 continue;
797 n--;
798 }
799 }
800 return t;
801}
802# endif
803
804# if ENABLE_BUSYBOX
805# if ENABLE_FEATURE_SH_STANDALONE && ENABLE_FEATURE_TAB_COMPLETION
806
807
808
809
810
811
812
813
814
815
816int busybox_main(int argc, char *argv[]) MAIN_EXTERNALLY_VISIBLE;
817# else
818# define busybox_main(argc,argv) busybox_main(argv)
819static
820# endif
821int busybox_main(int argc UNUSED_PARAM, char **argv)
822{
823 if (!argv[1]) {
824
825 const char *a;
826 int col;
827 unsigned output_width;
828 help:
829 output_width = get_terminal_width(2);
830
831 dup2(1, 2);
832 full_write2_str(bb_banner);
833 full_write2_str(" multi-call binary.\n");
834 full_write2_str(
835 "BusyBox is copyrighted by many authors between 1998-2015.\n"
836 "Licensed under GPLv2. See source distribution for detailed\n"
837 "copyright notices.\n"
838 "\n"
839 "Usage: busybox [function [arguments]...]\n"
840 " or: busybox --list"IF_FEATURE_INSTALLER("[-full]")"\n"
841# if ENABLE_FEATURE_SHOW_SCRIPT && NUM_SCRIPTS > 0
842 " or: busybox --show SCRIPT\n"
843# endif
844 IF_FEATURE_INSTALLER(
845 " or: busybox --install [-s] [DIR]\n"
846 )
847 " or: function [arguments]...\n"
848 "\n"
849 IF_NOT_FEATURE_SH_STANDALONE(
850 "\tBusyBox is a multi-call binary that combines many common Unix\n"
851 "\tutilities into a single executable. Most people will create a\n"
852 "\tlink to busybox for each function they wish to use and BusyBox\n"
853 "\twill act like whatever it was invoked as.\n"
854 )
855 IF_FEATURE_SH_STANDALONE(
856 "\tBusyBox is a multi-call binary that combines many common Unix\n"
857 "\tutilities into a single executable. The shell in this build\n"
858 "\tis configured to run built-in utilities without $PATH search.\n"
859 "\tYou don't need to install a link to busybox for each utility.\n"
860 "\tTo run external program, use full path (/sbin/ip instead of ip).\n"
861 )
862 "\n"
863 "Currently defined functions:\n"
864 );
865 col = 0;
866
867 output_width--;
868 a = applet_names;
869 while (*a) {
870 int len2 = strlen(a) + 2;
871 if (col >= (int)output_width - len2) {
872 full_write2_str(",\n");
873 col = 0;
874 }
875 if (col == 0) {
876 col = 6;
877 full_write2_str("\t");
878 } else {
879 full_write2_str(", ");
880 }
881 full_write2_str(a);
882 col += len2;
883 a += len2 - 1;
884 }
885 full_write2_str("\n");
886 return 0;
887 }
888
889# if ENABLE_FEATURE_SHOW_SCRIPT && NUM_SCRIPTS > 0
890 if (strcmp(argv[1], "--show") == 0) {
891 int n;
892 if (!argv[2])
893 bb_error_msg_and_die(bb_msg_requires_arg, "--show");
894 n = find_script_by_name(argv[2]);
895 if (n < 0)
896 bb_error_msg_and_die("script '%s' not found", argv[2]);
897 full_write1_str(get_script_content(n));
898 return 0;
899 }
900# endif
901
902 if (is_prefixed_with(argv[1], "--list")) {
903 unsigned i = 0;
904 const char *a = applet_names;
905 dup2(1, 2);
906 while (*a) {
907# if ENABLE_FEATURE_INSTALLER
908 if (argv[1][6])
909 full_write2_str(install_dir[APPLET_INSTALL_LOC(i)] + 1);
910# endif
911 full_write2_str(a);
912 full_write2_str("\n");
913 i++;
914 while (*a++ != '\0')
915 continue;
916 }
917 return 0;
918 }
919
920 if (ENABLE_FEATURE_INSTALLER && strcmp(argv[1], "--install") == 0) {
921 int use_symbolic_links;
922 const char *busybox;
923
924 busybox = xmalloc_readlink(bb_busybox_exec_path);
925 if (!busybox) {
926
927
928
929
930
931 if (argv[0][0] != '/')
932 bb_error_msg_and_die("'%s' is not an absolute path", argv[0]);
933 busybox = argv[0];
934 }
935
936
937
938
939 use_symbolic_links = (argv[2] && strcmp(argv[2], "-s") == 0 && ++argv);
940 install_links(busybox, use_symbolic_links, argv[2]);
941 return 0;
942 }
943
944 if (strcmp(argv[1], "--help") == 0) {
945
946 if (!argv[2])
947 goto help;
948
949 argv[0] = argv[2];
950 argv[2] = NULL;
951 } else {
952
953 argv++;
954 }
955
956
957 applet_name = bb_get_last_path_component_nostrip(argv[0]);
958 run_applet_and_exit(applet_name, argv);
959}
960# endif
961
962# if NUM_APPLETS > 0
963void FAST_FUNC run_applet_no_and_exit(int applet_no, const char *name, char **argv)
964{
965 int argc = string_array_len(argv);
966
967
968
969
970
971 applet_name = name;
972
973
974
975
976
977
978 if (1
979# if defined APPLET_NO_test
980 && applet_no != APPLET_NO_test
981# endif
982# if defined APPLET_NO_true
983 && applet_no != APPLET_NO_true
984# endif
985# if defined APPLET_NO_false
986 && applet_no != APPLET_NO_false
987# endif
988 ) {
989 if (argc == 2 && strcmp(argv[1], "--help") == 0) {
990
991 xfunc_error_retval = 0;
992 bb_show_usage();
993 }
994 }
995 if (ENABLE_FEATURE_SUID)
996 check_suid(applet_no);
997 xfunc_error_retval = applet_main[applet_no](argc, argv);
998
999 xfunc_die();
1000}
1001# endif
1002
1003# if ENABLE_BUSYBOX || NUM_APPLETS > 0
1004static NORETURN void run_applet_and_exit(const char *name, char **argv)
1005{
1006# if ENABLE_BUSYBOX
1007 if (is_prefixed_with(name, "busybox"))
1008 exit(busybox_main( 0, argv));
1009# endif
1010# if NUM_APPLETS > 0
1011
1012 {
1013 int applet = find_applet_by_name(name);
1014 if (applet >= 0)
1015 run_applet_no_and_exit(applet, name, argv);
1016 }
1017# endif
1018
1019
1020 full_write2_str(applet_name);
1021 full_write2_str(": applet not found\n");
1022
1023 exit(127);
1024}
1025# endif
1026
1027#endif
1028
1029
1030#if ENABLE_BUILD_LIBBUSYBOX
1031int lbb_main(char **argv)
1032#else
1033int main(int argc UNUSED_PARAM, char **argv)
1034#endif
1035{
1036#if 0
1037
1038
1039
1040
1041
1042
1043
1044 extern char _end[] __attribute__((weak));
1045 unsigned end_len = (-(int)_end) & 0xfff;
1046 printf("_end:%p %u bytes\n", &_end, end_len);
1047#endif
1048
1049
1050#ifdef M_TRIM_THRESHOLD
1051
1052
1053
1054
1055 mallopt(M_TRIM_THRESHOLD, 8 * 1024);
1056#endif
1057#ifdef M_MMAP_THRESHOLD
1058
1059
1060
1061 mallopt(M_MMAP_THRESHOLD, 32 * 1024 - 256);
1062#endif
1063#if 0
1064
1065
1066
1067
1068
1069 mallopt(M_TOP_PAD, 8 * 1024);
1070#endif
1071
1072#if !BB_MMU
1073
1074 if (argv[0][0] & 0x80) {
1075 re_execed = 1;
1076 argv[0][0] &= 0x7f;
1077 }
1078#endif
1079
1080#if defined(SINGLE_APPLET_MAIN)
1081
1082
1083 if (argv[1] && is_prefixed_with(argv[0], "busybox")) {
1084
1085 argv++;
1086 }
1087
1088 lbb_prepare(applet_names IF_FEATURE_INDIVIDUAL(, argv));
1089# if ENABLE_BUILD_LIBBUSYBOX
1090 return SINGLE_APPLET_MAIN(string_array_len(argv), argv);
1091# else
1092 return SINGLE_APPLET_MAIN(argc, argv);
1093# endif
1094
1095#elif !ENABLE_BUSYBOX && NUM_APPLETS == 0
1096
1097 full_write2_str(bb_basename(argv[0]));
1098 full_write2_str(": no applets enabled\n");
1099 exit(127);
1100
1101#else
1102
1103 lbb_prepare("busybox" IF_FEATURE_INDIVIDUAL(, argv));
1104# if !ENABLE_BUSYBOX
1105 if (argv[1] && is_prefixed_with(bb_basename(argv[0]), "busybox"))
1106 argv++;
1107# endif
1108 applet_name = argv[0];
1109 if (applet_name[0] == '-')
1110 applet_name++;
1111 applet_name = bb_basename(applet_name);
1112
1113
1114 if (ENABLE_FEATURE_SH_STANDALONE
1115 || ENABLE_FEATURE_PREFER_APPLETS
1116 || !BB_MMU
1117 ) {
1118 if (NUM_APPLETS > 1)
1119 set_task_comm(applet_name);
1120 }
1121
1122 parse_config_file();
1123 run_applet_and_exit(applet_name, argv);
1124
1125#endif
1126}
1127