LXR linux/scripts/selinux/genheaders/genheaders.c

   1#include <stdio.h>
   2#include <stdlib.h>
   3#include <unistd.h>
   4#include <string.h>
   5#include <errno.h>
   6#include <ctype.h>
   7
   8struct security_class_mapping {
   9        const char *name;
  10        const char *perms[sizeof(unsigned) * 8 + 1];
  11};
  12
  13#include "classmap.h"
  14#include "initial_sid_to_string.h"
  15
  16#define max(x, y) (((int)(x) > (int)(y)) ? x : y)
  17
  18const char *progname;
  19
  20static void usage(void)
  21{
  22        printf("usage: %s flask.h av_permissions.h\n", progname);
  23        exit(1);
  24}
  25
  26static char *stoupperx(const char *s)
  27{
  28        char *s2 = strdup(s);
  29        char *p;
  30
  31        if (!s2) {
  32                fprintf(stderr, "%s:  out of memory\n", progname);
  33                exit(3);
  34        }
  35
  36        for (p = s2; *p; p++)
  37                *p = toupper(*p);
  38        return s2;
  39}
  40
  41int main(int argc, char *argv[])
  42{
  43        int i, j, k;
  44        int isids_len;
  45        FILE *fout;
  46        const char *needle = "SOCKET";
  47        char *substr;
  48
  49        progname = argv[0];
  50
  51        if (argc < 3)
  52                usage();
  53
  54        fout = fopen(argv[1], "w");
  55        if (!fout) {
  56                fprintf(stderr, "Could not open %s for writing:  %s\n",
  57                        argv[1], strerror(errno));
  58                exit(2);
  59        }
  60
  61        for (i = 0; secclass_map[i].name; i++) {
  62                struct security_class_mapping *map = &secclass_map[i];
  63                map->name = stoupperx(map->name);
  64                for (j = 0; map->perms[j]; j++)
  65                        map->perms[j] = stoupperx(map->perms[j]);
  66        }
  67
  68        isids_len = sizeof(initial_sid_to_string) / sizeof (char *);
  69        for (i = 1; i < isids_len; i++)
  70                initial_sid_to_string[i] = stoupperx(initial_sid_to_string[i]);
  71
  72        fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
  73        fprintf(fout, "#ifndef _SELINUX_FLASK_H_\n#define _SELINUX_FLASK_H_\n\n");
  74
  75        for (i = 0; secclass_map[i].name; i++) {
  76                struct security_class_mapping *map = &secclass_map[i];
  77                fprintf(fout, "#define SECCLASS_%s", map->name);
  78                for (j = 0; j < max(1, 40 - strlen(map->name)); j++)
  79                        fprintf(fout, " ");
  80                fprintf(fout, "%2d\n", i+1);
  81        }
  82
  83        fprintf(fout, "\n");
  84
  85        for (i = 1; i < isids_len; i++) {
  86                const char *s = initial_sid_to_string[i];
  87                fprintf(fout, "#define SECINITSID_%s", s);
  88                for (j = 0; j < max(1, 40 - strlen(s)); j++)
  89                        fprintf(fout, " ");
  90                fprintf(fout, "%2d\n", i);
  91        }
  92        fprintf(fout, "\n#define SECINITSID_NUM %d\n", i-1);
  93        fprintf(fout, "\nstatic inline bool security_is_socket_class(u16 kern_tclass)\n");
  94        fprintf(fout, "{\n");
  95        fprintf(fout, "\tbool sock = false;\n\n");
  96        fprintf(fout, "\tswitch (kern_tclass) {\n");
  97        for (i = 0; secclass_map[i].name; i++) {
  98                struct security_class_mapping *map = &secclass_map[i];
  99                substr = strstr(map->name, needle);
 100                if (substr && strcmp(substr, needle) == 0)
 101                        fprintf(fout, "\tcase SECCLASS_%s:\n", map->name);
 102        }
 103        fprintf(fout, "\t\tsock = true;\n");
 104        fprintf(fout, "\t\tbreak;\n");
 105        fprintf(fout, "\tdefault:\n");
 106        fprintf(fout, "\t\tbreak;\n");
 107        fprintf(fout, "\t}\n\n");
 108        fprintf(fout, "\treturn sock;\n");
 109        fprintf(fout, "}\n");
 110
 111        fprintf(fout, "\n#endif\n");
 112        fclose(fout);
 113
 114        fout = fopen(argv[2], "w");
 115        if (!fout) {
 116                fprintf(stderr, "Could not open %s for writing:  %s\n",
 117                        argv[2], strerror(errno));
 118                exit(4);
 119        }
 120
 121        fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
 122        fprintf(fout, "#ifndef _SELINUX_AV_PERMISSIONS_H_\n#define _SELINUX_AV_PERMISSIONS_H_\n\n");
 123
 124        for (i = 0; secclass_map[i].name; i++) {
 125                struct security_class_mapping *map = &secclass_map[i];
 126                for (j = 0; map->perms[j]; j++) {
 127                        fprintf(fout, "#define %s__%s", map->name,
 128                                map->perms[j]);
 129                        for (k = 0; k < max(1, 40 - strlen(map->name) - strlen(map->perms[j])); k++)
 130                                fprintf(fout, " ");
 131                        fprintf(fout, "0x%08xUL\n", (1<<j));
 132                }
 133        }
 134
 135        fprintf(fout, "\n#endif\n");
 136        fclose(fout);
 137        exit(0);
 138}
 139