mirror of
https://github.com/darlinghq/darling-removefile.git
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122 lines
3.2 KiB
C
122 lines
3.2 KiB
C
/* srm */
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/* Copyright (c) 2000 Matthew D. Gauthier
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* Portions copyright (c) 2007 Apple Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of the contributors shall
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* not be used in advertising or otherwise to promote the sale, use or
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* other dealings in this Software without prior written authorization.
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*/
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#include <ctype.h>
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#include <dirent.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <TargetConditionals.h>
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#include "removefile.h"
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#include "removefile_priv.h"
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static int empty_directory(const char *path) {
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DIR *dp;
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struct dirent *de;
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dp = opendir(path);
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if (dp == NULL) {
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return -1;
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}
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while ((de = readdir(dp)) != NULL) {
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if (de->d_namlen < 3 && (!strcmp(de->d_name, ".") || !strcmp(de->d_name, ".."))) {
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continue;
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}
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(void)closedir(dp);
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return -1;
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}
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(void)closedir(dp);
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return 0;
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}
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int
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__removefile_rename_unlink(const char *path, removefile_state_t state) {
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char *p, c;
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struct stat statbuf;
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size_t new_name_size = strlen(path) + 15;
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char new_name[new_name_size];
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int i = 0;
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strlcpy(new_name, path, new_name_size);
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if ( (p = strrchr(new_name, '/')) != NULL ) {
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p++;
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*p = '\0';
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} else {
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p = new_name;
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}
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do {
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i = 0;
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while (i < 14) {
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c = __removefile_random_char(state);
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if (isalnum((int) c)) {
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p[i] = c;
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i++;
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}
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}
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p[i] = '\0';
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} while (lstat(new_name, &statbuf) == 0);
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if (lstat(path, &statbuf) == -1)
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return -1;
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#if __APPLE__
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if (S_ISDIR(statbuf.st_mode) && (statbuf.st_flags & SF_DATALESS) != 0) {
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return unlinkat(AT_FDCWD, path, AT_REMOVEDIR_DATALESS);
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}
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#endif
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if (S_ISDIR(statbuf.st_mode) && (empty_directory(path) == -1)) {
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/* Directory isn't empty (e.g. because it contains an immutable file).
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Attempting to remove it will fail, so avoid renaming it. */
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errno = ENOTEMPTY;
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return -1;
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}
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if (rename(path, new_name) == -1)
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return -1;
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if (lstat(new_name, &statbuf) == -1) {
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errno = ENOENT;
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return -1;
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}
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if (S_ISDIR(statbuf.st_mode))
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return rmdir(new_name);
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return unlink(new_name);
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}
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