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 #include "libbb.h"
  10
  11 /* Used from NOFORK applets. Must not allocate anything */
  12
  13 int FAST_FUNC remove_file(const char *path, int flags)
  14 {
  15         struct stat path_stat;
  16
  17         if (lstat(path, &path_stat) < 0) {
  18                 if (errno != ENOENT) {
  19                         bb_perror_msg("can't stat '%s'", path);
  20                         return -1;
  21                 }
  22                 if (!(flags & FILEUTILS_FORCE)) {
  23                         bb_perror_msg("can't remove '%s'", path);
  24                         return -1;
  25                 }
  26                 return 0;
  27         }
  28
  29         if (S_ISDIR(path_stat.st_mode)) {
  30                 DIR *dp;
  31                 struct dirent *d;
  32                 int status = 0;
  33
  34                 if (!(flags & FILEUTILS_RECUR)) {
  35                         bb_error_msg("'%s' is a directory", path);
  36                         return -1;
  37                 }
  38
  39                 if ((!(flags & FILEUTILS_FORCE) && access(path, W_OK) < 0 && isatty(0))
  40                  || (flags & FILEUTILS_INTERACTIVE)
  41                 ) {
  42                         fprintf(stderr, "%s: descend into directory '%s'? ",
  43                                         applet_name, path);
  44                         if (!bb_ask_y_confirmation())
  45                                 return 0;
  46                 }
  47
  48                 dp = opendir(path);
  49                 if (dp == NULL) {
  50                         return -1;
  51                 }
  52
  53                 while ((d = readdir(dp)) != NULL) {
  54                         char *new_path;
  55
  56                         new_path = concat_subpath_file(path, d->d_name);
  57                         if (new_path == NULL)
  58                                 continue;
  59                         if (remove_file(new_path, flags) < 0)
  60                                 status = -1;
  61                         free(new_path);
  62                 }
  63
  64                 if (closedir(dp) < 0) {
  65                         bb_perror_msg("can't close '%s'", path);
  66                         return -1;
  67                 }
  68
  69                 if (flags & FILEUTILS_INTERACTIVE) {
  70                         fprintf(stderr, "%s: remove directory '%s'? ",
  71                                         applet_name, path);
  72                         if (!bb_ask_y_confirmation())
  73                                 return status;
  74                 }
  75
  76                 if (status == 0 && rmdir(path) < 0) {
  77                         bb_perror_msg("can't remove '%s'", path);
  78                         return -1;
  79                 }
  80
  81                 if (flags & FILEUTILS_VERBOSE) {
  82                         printf("removed directory: '%s'\n", path);
  83                 }
  84
  85                 return status;
  86         }
  87
  88         /* !ISDIR */
  89         if ((!(flags & FILEUTILS_FORCE)
  90              && access(path, W_OK) < 0
  91              && !S_ISLNK(path_stat.st_mode)
  92              && isatty(0))
  93          || (flags & FILEUTILS_INTERACTIVE)
  94         ) {
  95                 fprintf(stderr, "%s: remove '%s'? ", applet_name, path);
  96                 if (!bb_ask_y_confirmation())
  97                         return 0;
  98         }
  99
 100         if (unlink(path) < 0) {
 101                 bb_perror_msg("can't remove '%s'", path);
 102                 return -1;
 103         }
 104
 105         if (flags & FILEUTILS_VERBOSE) {
 106                 printf("removed '%s'\n", path);
 107         }
 108
 109         return 0;
 110 }