release/src/router/busybox/selinux/matchpathcon.c

   1 /* matchpathcon  -  get the default security context for the specified
   2  *                  path from the file contexts configuration.
   3  *                  based on libselinux-1.32
   4  * Port to busybox: KaiGai Kohei <kaigai@kaigai.gr.jp>
   5  *
   6  * Licensed under GPLv2, see file LICENSE in this source tree.
   7  */
   8 #include "libbb.h"
   9
  10 static int print_matchpathcon(char *path, int noprint)
  11 {
  12         char *buf;
  13         int rc = matchpathcon(path, 0, &buf);
  14         if (rc < 0) {
  15                 bb_perror_msg("matchpathcon(%s) failed", path);
  16                 return 1;
  17         }
  18         if (!noprint)
  19                 printf("%s\t%s\n", path, buf);
  20         else
  21                 puts(buf);
  22
  23         freecon(buf);
  24         return 0;
  25 }
  26
  27 #define OPT_NOT_PRINT   (1<<0)  /* -n */
  28 #define OPT_NOT_TRANS   (1<<1)  /* -N */
  29 #define OPT_FCONTEXT    (1<<2)  /* -f */
  30 #define OPT_PREFIX      (1<<3)  /* -p */
  31 #define OPT_VERIFY      (1<<4)  /* -V */
  32
  33 int matchpathcon_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  34 int matchpathcon_main(int argc UNUSED_PARAM, char **argv)
  35 {
  36         int error = 0;
  37         unsigned opts;
  38         char *fcontext, *prefix, *path;
  39
  40         opt_complementary = "-1" /* at least one param reqd */
  41                 ":?:f--p:p--f"; /* mutually exclusive */
  42         opts = getopt32(argv, "nNf:p:V", &fcontext, &prefix);
  43         argv += optind;
  44
  45         if (opts & OPT_NOT_TRANS) {
  46                 set_matchpathcon_flags(MATCHPATHCON_NOTRANS);
  47         }
  48         if (opts & OPT_FCONTEXT) {
  49                 if (matchpathcon_init(fcontext))
  50                         bb_perror_msg_and_die("error while processing %s", fcontext);
  51         }
  52         if (opts & OPT_PREFIX) {
  53                 if (matchpathcon_init_prefix(NULL, prefix))
  54                         bb_perror_msg_and_die("error while processing %s", prefix);
  55         }
  56
  57         while ((path = *argv++) != NULL) {
  58                 security_context_t con;
  59                 int rc;
  60
  61                 if (!(opts & OPT_VERIFY)) {
  62                         error += print_matchpathcon(path, opts & OPT_NOT_PRINT);
  63                         continue;
  64                 }
  65
  66                 if (selinux_file_context_verify(path, 0)) {
  67                         printf("%s verified\n", path);
  68                         continue;
  69                 }
  70
  71                 if (opts & OPT_NOT_TRANS)
  72                         rc = lgetfilecon_raw(path, &con);
  73                 else
  74                         rc = lgetfilecon(path, &con);
  75
  76                 if (rc >= 0) {
  77                         printf("%s has context %s, should be ", path, con);
  78                         error += print_matchpathcon(path, 1);
  79                         freecon(con);
  80                         continue;
  81                 }
  82                 printf("actual context unknown: %s, should be ", strerror(errno));
  83                 error += print_matchpathcon(path, 1);
  84         }
  85         matchpathcon_fini();
  86         return error;
  87 }