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

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini remove_file implementation for busybox
   4  *
   5  * Copyright (C) 2001 Matt Kraai <kraai@alumni.carnegiemellon.edu>
   6  *
   7  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   8  */
   9
  10 #include "libbb.h"
  11
  12 /* Used from NOFORK applets. Must not allocate anything */
  13
  14 int FAST_FUNC remove_file(const char *path, int flags)
  15 {
  16         struct stat path_stat;
  17
  18         if (lstat(path, &path_stat) < 0) {
  19                 if (errno != ENOENT) {
  20                         bb_perror_msg("can't stat '%s'", path);
  21                         return -1;
  22                 }
  23                 if (!(flags & FILEUTILS_FORCE)) {
  24                         bb_perror_msg("can't remove '%s'", path);
  25                         return -1;
  26                 }
  27                 return 0;
  28         }
  29
  30         if (S_ISDIR(path_stat.st_mode)) {
  31                 DIR *dp;
  32                 struct dirent *d;
  33                 int status = 0;
  34
  35                 if (!(flags & FILEUTILS_RECUR)) {
  36                         bb_error_msg("'%s' is a directory", path);
  37                         return -1;
  38                 }
  39
  40                 if ((!(flags & FILEUTILS_FORCE) && access(path, W_OK) < 0 && isatty(0))
  41                  || (flags & FILEUTILS_INTERACTIVE)
  42                 ) {
  43                         fprintf(stderr, "%s: descend into directory '%s'? ", applet_name,
  44                                         path);
  45                         if (!bb_ask_confirmation())
  46                                 return 0;
  47                 }
  48
  49                 dp = opendir(path);
  50                 if (dp == NULL) {
  51                         return -1;
  52                 }
  53
  54                 while ((d = readdir(dp)) != NULL) {
  55                         char *new_path;
  56
  57                         new_path = concat_subpath_file(path, d->d_name);
  58                         if (new_path == NULL)
  59                                 continue;
  60                         if (remove_file(new_path, flags) < 0)
  61                                 status = -1;
  62                         free(new_path);
  63                 }
  64
  65                 if (closedir(dp) < 0) {
  66                         bb_perror_msg("can't close '%s'", path);
  67                         return -1;
  68                 }
  69
  70                 if (flags & FILEUTILS_INTERACTIVE) {
  71                         fprintf(stderr, "%s: remove directory '%s'? ", applet_name, path);
  72                         if (!bb_ask_confirmation())
  73                                 return status;
  74                 }
  75
  76                 if (rmdir(path) < 0) {
  77                         bb_perror_msg("can't remove '%s'", path);
  78                         return -1;
  79                 }
  80
  81                 return status;
  82         }
  83
  84         /* !ISDIR */
  85         if ((!(flags & FILEUTILS_FORCE)
  86              && access(path, W_OK) < 0
  87              && !S_ISLNK(path_stat.st_mode)
  88              && isatty(0))
  89          || (flags & FILEUTILS_INTERACTIVE)
  90         ) {
  91                 fprintf(stderr, "%s: remove '%s'? ", applet_name, path);
  92                 if (!bb_ask_confirmation())
  93                         return 0;
  94         }
  95
  96         if (unlink(path) < 0) {
  97                 bb_perror_msg("can't remove '%s'", path);
  98                 return -1;
  99         }
 100
 101         return 0;
 102 }