release/src/router/busybox/libbb/match_fstype.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Match fstypes for use in mount unmount
   4  * We accept notmpfs,nfs but not notmpfs,nonfs
   5  * This allows us to match fstypes that start with no like so
   6  *   mount -at ,noddy
   7  *
   8  * Returns 1 for a match, otherwise 0
   9  *
  10  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  11  */
  12
  13 #include "libbb.h"
  14
  15 #ifdef HAVE_MNTENT_H
  16
  17 int FAST_FUNC match_fstype(const struct mntent *mt, const char *t_fstype)
  18 {
  19         int match = 1;
  20         int len;
  21
  22         if (!t_fstype)
  23                 return match;
  24
  25         if (t_fstype[0] == 'n' && t_fstype[1] == 'o') {
  26                 match--;
  27                 t_fstype += 2;
  28         }
  29
  30         len = strlen(mt->mnt_type);
  31         while (1) {
  32                 if (strncmp(mt->mnt_type, t_fstype, len) == 0
  33                  && (t_fstype[len] == '\0' || t_fstype[len] == ',')
  34                 ) {
  35                         return match;
  36                 }
  37                 t_fstype = strchr(t_fstype, ',');
  38                 if (!t_fstype)
  39                         break;
  40                 t_fstype++;
  41         }
  42
  43         return !match;
  44 }
  45
  46 #endif /* HAVE_MNTENT_H */