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  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21
  22 #include <stdio.h>
  23 #include <time.h>
  24 #include <utime.h>
  25 #include <dirent.h>
  26 #include <errno.h>
  27 #include <unistd.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <getopt.h>
  31 #include "libbb.h"
  32
  33 extern int remove_file(const char *path, int flags)
  34 {
  35         struct stat path_stat;
  36         int path_exists = 1;
  37
  38         if (lstat(path, &path_stat) < 0) {
  39                 if (errno != ENOENT) {
  40                         perror_msg("unable to stat `%s'", path);
  41                         return -1;
  42                 }
  43
  44                 path_exists = 0;
  45         }
  46
  47         if (!path_exists) {
  48                 if (!(flags & FILEUTILS_FORCE)) {
  49                         perror_msg("cannot remove `%s'", path);
  50                         return -1;
  51                 }
  52                 return 0;
  53         }
  54
  55         if (S_ISDIR(path_stat.st_mode)) {
  56                 DIR *dp;
  57                 struct dirent *d;
  58                 int status = 0;
  59
  60                 if (!(flags & FILEUTILS_RECUR)) {
  61                         error_msg("%s: is a directory", path);
  62                         return -1;
  63                 }
  64
  65                 if ((!(flags & FILEUTILS_FORCE) && access(path, W_OK) < 0 &&
  66                                         isatty(0)) ||
  67                                 (flags & FILEUTILS_INTERACTIVE)) {
  68                         fprintf(stderr, "%s: descend into directory `%s'? ", applet_name,
  69                                         path);
  70                         if (!ask_confirmation())
  71                                 return 0;
  72                 }
  73
  74                 if ((dp = opendir(path)) == NULL) {
  75                         perror_msg("unable to open `%s'", path);
  76                         return -1;
  77                 }
  78
  79                 while ((d = readdir(dp)) != NULL) {
  80                         char *new_path;
  81
  82                         if (strcmp(d->d_name, ".") == 0 ||
  83                                         strcmp(d->d_name, "..") == 0)
  84                                 continue;
  85
  86                         new_path = concat_path_file(path, d->d_name);
  87                         if (remove_file(new_path, flags) < 0)
  88                                 status = -1;
  89                         free(new_path);
  90                 }
  91
  92                 if (closedir(dp) < 0) {
  93                         perror_msg("unable to close `%s'", path);
  94                         return -1;
  95                 }
  96
  97                 if (flags & FILEUTILS_INTERACTIVE) {
  98                         fprintf(stderr, "%s: remove directory `%s'? ", applet_name, path);
  99                         if (!ask_confirmation())
 100                                 return status;
 101                 }
 102
 103                 if (rmdir(path) < 0) {
 104                         perror_msg("unable to remove `%s'", path);
 105                         return -1;
 106                 }
 107
 108                 return status;
 109         } else {
 110                 if ((!(flags & FILEUTILS_FORCE) && access(path, W_OK) < 0 &&
 111                                         !S_ISLNK(path_stat.st_mode) &&
 112                                         isatty(0)) ||
 113                                 (flags & FILEUTILS_INTERACTIVE)) {
 114                         fprintf(stderr, "%s: remove `%s'? ", applet_name, path);
 115                         if (!ask_confirmation())
 116                                 return 0;
 117                 }
 118
 119                 if (unlink(path) < 0) {
 120                         perror_msg("unable to remove `%s'", path);
 121                         return -1;
 122                 }
 123
 124                 return 0;
 125         }
 126 }