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
   8 struct 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
  18 const char *progname;
  19
  20 static void usage(void)
  21 {
  22         printf("usage: %s flask.h av_permissions.h\n", progname);
  23         exit(1);
  24 }
  25
  26 static 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
  41 int main(int argc, char *argv[])
  42 {
  43         int i, j, k;
  44         int isids_len;
  45         FILE *fout;
  46
  47         progname = argv[0];
  48
  49         if (argc < 3)
  50                 usage();
  51
  52         fout = fopen(argv[1], "w");
  53         if (!fout) {
  54                 fprintf(stderr, "Could not open %s for writing:  %s\n",
  55                         argv[1], strerror(errno));
  56                 exit(2);
  57         }
  58
  59         for (i = 0; secclass_map[i].name; i++) {
  60                 struct security_class_mapping *map = &secclass_map[i];
  61                 map->name = stoupperx(map->name);
  62                 for (j = 0; map->perms[j]; j++)
  63                         map->perms[j] = stoupperx(map->perms[j]);
  64         }
  65
  66         isids_len = sizeof(initial_sid_to_string) / sizeof (char *);
  67         for (i = 1; i < isids_len; i++)
  68                 initial_sid_to_string[i] = stoupperx(initial_sid_to_string[i]);
  69
  70         fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
  71         fprintf(fout, "#ifndef _SELINUX_FLASK_H_\n#define _SELINUX_FLASK_H_\n\n");
  72
  73         for (i = 0; secclass_map[i].name; i++) {
  74                 struct security_class_mapping *map = &secclass_map[i];
  75                 fprintf(fout, "#define SECCLASS_%s", map->name);
  76                 for (j = 0; j < max(1, 40 - strlen(map->name)); j++)
  77                         fprintf(fout, " ");
  78                 fprintf(fout, "%2d\n", i+1);
  79         }
  80
  81         fprintf(fout, "\n");
  82
  83         for (i = 1; i < isids_len; i++) {
  84                 char *s = initial_sid_to_string[i];
  85                 fprintf(fout, "#define SECINITSID_%s", s);
  86                 for (j = 0; j < max(1, 40 - strlen(s)); j++)
  87                         fprintf(fout, " ");
  88                 fprintf(fout, "%2d\n", i);
  89         }
  90         fprintf(fout, "\n#define SECINITSID_NUM %d\n", i-1);
  91         fprintf(fout, "\n#endif\n");
  92         fclose(fout);
  93
  94         fout = fopen(argv[2], "w");
  95         if (!fout) {
  96                 fprintf(stderr, "Could not open %s for writing:  %s\n",
  97                         argv[2], strerror(errno));
  98                 exit(4);
  99         }
 100
 101         fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
 102         fprintf(fout, "#ifndef _SELINUX_AV_PERMISSIONS_H_\n#define _SELINUX_AV_PERMISSIONS_H_\n\n");
 103
 104         for (i = 0; secclass_map[i].name; i++) {
 105                 struct security_class_mapping *map = &secclass_map[i];
 106                 for (j = 0; map->perms[j]; j++) {
 107                         fprintf(fout, "#define %s__%s", map->name,
 108                                 map->perms[j]);
 109                         for (k = 0; k < max(1, 40 - strlen(map->name) - strlen(map->perms[j])); k++)
 110                                 fprintf(fout, " ");
 111                         fprintf(fout, "0x%08xUL\n", (1<<j));
 112                 }
 113         }
 114
 115         fprintf(fout, "\n#endif\n");
 116         fclose(fout);
 117         exit(0);
 118 }