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
   9 //usage:#define matchpathcon_trivial_usage
  10 //usage:       "[-n] [-N] [-f file_contexts_file] [-p prefix] [-V]"
  11 //usage:#define matchpathcon_full_usage "\n\n"
  12 //usage:       "        -n      Don't display path"
  13 //usage:     "\n        -N      Don't use translations"
  14 //usage:     "\n        -f      Use alternate file_context file"
  15 //usage:     "\n        -p      Use prefix to speed translations"
  16 //usage:     "\n        -V      Verify file context on disk matches defaults"
  17
  18 #include "libbb.h"
  19
  20 static int print_matchpathcon(char *path, int noprint)
  21 {
  22         char *buf;
  23         int rc = matchpathcon(path, 0, &buf);
  24         if (rc < 0) {
  25                 bb_perror_msg("matchpathcon(%s) failed", path);
  26                 return 1;
  27         }
  28         if (!noprint)
  29                 printf("%s\t%s\n", path, buf);
  30         else
  31                 puts(buf);
  32
  33         freecon(buf);
  34         return 0;
  35 }
  36
  37 #define OPT_NOT_PRINT   (1<<0)  /* -n */
  38 #define OPT_NOT_TRANS   (1<<1)  /* -N */
  39 #define OPT_FCONTEXT    (1<<2)  /* -f */
  40 #define OPT_PREFIX      (1<<3)  /* -p */
  41 #define OPT_VERIFY      (1<<4)  /* -V */
  42
  43 int matchpathcon_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  44 int matchpathcon_main(int argc UNUSED_PARAM, char **argv)
  45 {
  46         int error = 0;
  47         unsigned opts;
  48         char *fcontext, *prefix, *path;
  49
  50         opt_complementary = "-1" /* at least one param reqd */
  51                 ":?:f--p:p--f"; /* mutually exclusive */
  52         opts = getopt32(argv, "nNf:p:V", &fcontext, &prefix);
  53         argv += optind;
  54
  55         if (opts & OPT_NOT_TRANS) {
  56                 set_matchpathcon_flags(MATCHPATHCON_NOTRANS);
  57         }
  58         if (opts & OPT_FCONTEXT) {
  59                 if (matchpathcon_init(fcontext))
  60                         bb_perror_msg_and_die("error while processing %s", fcontext);
  61         }
  62         if (opts & OPT_PREFIX) {
  63                 if (matchpathcon_init_prefix(NULL, prefix))
  64                         bb_perror_msg_and_die("error while processing %s", prefix);
  65         }
  66
  67         while ((path = *argv++) != NULL) {
  68                 security_context_t con;
  69                 int rc;
  70
  71                 if (!(opts & OPT_VERIFY)) {
  72                         error += print_matchpathcon(path, opts & OPT_NOT_PRINT);
  73                         continue;
  74                 }
  75
  76                 if (selinux_file_context_verify(path, 0)) {
  77                         printf("%s verified\n", path);
  78                         continue;
  79                 }
  80
  81                 if (opts & OPT_NOT_TRANS)
  82                         rc = lgetfilecon_raw(path, &con);
  83                 else
  84                         rc = lgetfilecon(path, &con);
  85
  86                 if (rc >= 0) {
  87                         printf("%s has context %s, should be ", path, con);
  88                         error += print_matchpathcon(path, 1);
  89                         freecon(con);
  90                         continue;
  91                 }
  92                 printf("actual context unknown: %s, should be ", strerror(errno));
  93                 error += print_matchpathcon(path, 1);
  94         }
  95         matchpathcon_fini();
  96         return error;
  97 }