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 tarball for details.
   8  */
   9
  10 #include "libbb.h"
  11
  12 int remove_file(const char *path, int flags)
  13 {
  14         struct stat path_stat;
  15
  16         if (lstat(path, &path_stat) < 0) {
  17                 if (errno != ENOENT) {
  18                         bb_perror_msg("cannot stat '%s'", path);
  19                         return -1;
  20                 }
  21                 if (!(flags & FILEUTILS_FORCE)) {
  22                         bb_perror_msg("cannot remove '%s'", path);
  23                         return -1;
  24                 }
  25                 return 0;
  26         }
  27
  28         if (S_ISDIR(path_stat.st_mode)) {
  29                 DIR *dp;
  30                 struct dirent *d;
  31                 int status = 0;
  32
  33                 if (!(flags & FILEUTILS_RECUR)) {
  34                         bb_error_msg("%s: is a directory", path);
  35                         return -1;
  36                 }
  37
  38                 if ((!(flags & FILEUTILS_FORCE) && access(path, W_OK) < 0 && isatty(0))
  39                  || (flags & FILEUTILS_INTERACTIVE)
  40                 ) {
  41                         fprintf(stderr, "%s: descend into directory '%s'? ", applet_name,
  42                                         path);
  43                         if (!bb_ask_confirmation())
  44                                 return 0;
  45                 }
  46
  47                 dp = opendir(path);
  48                 if (dp == NULL) {
  49                         return -1;
  50                 }
  51
  52                 while ((d = readdir(dp)) != NULL) {
  53                         char *new_path;
  54
  55                         new_path = concat_subpath_file(path, d->d_name);
  56                         if (new_path == NULL)
  57                                 continue;
  58                         if (remove_file(new_path, flags) < 0)
  59                                 status = -1;
  60                         free(new_path);
  61                 }
  62
  63                 if (closedir(dp) < 0) {
  64                         bb_perror_msg("cannot close '%s'", path);
  65                         return -1;
  66                 }
  67
  68                 if (flags & FILEUTILS_INTERACTIVE) {
  69                         fprintf(stderr, "%s: remove directory '%s'? ", applet_name, path);
  70                         if (!bb_ask_confirmation())
  71                                 return status;
  72                 }
  73
  74                 if (rmdir(path) < 0) {
  75                         bb_perror_msg("cannot remove '%s'", path);
  76                         return -1;
  77                 }
  78
  79                 return status;
  80         }
  81
  82         /* !ISDIR */
  83         if ((!(flags & FILEUTILS_FORCE) && access(path, W_OK) < 0
  84                         && !S_ISLNK(path_stat.st_mode) && isatty(0))
  85          || (flags & FILEUTILS_INTERACTIVE)
  86         ) {
  87                 fprintf(stderr, "%s: remove '%s'? ", applet_name, path);
  88                 if (!bb_ask_confirmation())
  89                         return 0;
  90         }
  91
  92         if (unlink(path) < 0) {
  93                 bb_perror_msg("cannot remove '%s'", path);
  94                 return -1;
  95         }
  96
  97         return 0;
  98 }