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https://github.com/topjohnwu/ndk-busybox.git
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104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* parse_mode implementation for busybox
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*
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* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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/* Mar 5, 2003 Manuel Novoa III
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*
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* This is the main work function for the 'mkdir' applet. As such, it
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* strives to be SUSv3 compliant in it's behaviour when recursively
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* making missing parent dirs, and in it's mode setting of the final
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* directory 'path'.
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*
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* To recursively build all missing intermediate directories, make
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* sure that (flags & FILEUTILS_RECUR) is non-zero. Newly created
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* intermediate directories will have at least u+wx perms.
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*
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* To set specific permissions on 'path', pass the appropriate 'mode'
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* val. Otherwise, pass -1 to get default permissions.
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*/
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#include "libbb.h"
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/* This function is used from NOFORK applets. It must not allocate anything */
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int bb_make_directory (char *path, long mode, int flags)
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{
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mode_t mask;
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const char *fail_msg;
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char *s = path;
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char c;
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struct stat st;
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mask = umask(0);
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if (mode == -1) {
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umask(mask);
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mode = (S_IXUSR | S_IXGRP | S_IXOTH |
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S_IWUSR | S_IWGRP | S_IWOTH |
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S_IRUSR | S_IRGRP | S_IROTH) & ~mask;
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} else {
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umask(mask & ~0300);
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}
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do {
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c = 0;
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if (flags & FILEUTILS_RECUR) { /* Get the parent. */
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/* Bypass leading non-'/'s and then subsequent '/'s. */
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while (*s) {
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if (*s == '/') {
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do {
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++s;
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} while (*s == '/');
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c = *s; /* Save the current char */
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*s = 0; /* and replace it with nul. */
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break;
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}
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++s;
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}
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}
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if (mkdir(path, 0777) < 0) {
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/* If we failed for any other reason than the directory
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* already exists, output a diagnostic and return -1.*/
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if (errno != EEXIST
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|| !(flags & FILEUTILS_RECUR)
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|| (stat(path, &st) < 0 || !S_ISDIR(st.st_mode))) {
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fail_msg = "create";
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umask(mask);
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break;
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}
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/* Since the directory exists, don't attempt to change
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* permissions if it was the full target. Note that
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* this is not an error conditon. */
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if (!c) {
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umask(mask);
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return 0;
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}
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}
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if (!c) {
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/* Done. If necessary, updated perms on the newly
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* created directory. Failure to update here _is_
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* an error.*/
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umask(mask);
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if ((mode != -1) && (chmod(path, mode) < 0)){
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fail_msg = "set permissions of";
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break;
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}
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return 0;
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}
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/* Remove any inserted nul from the path (recursive mode). */
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*s = c;
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} while (1);
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bb_perror_msg ("cannot %s directory '%s'", fail_msg, path);
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return -1;
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}
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