busybox

/* vi: set sw=4 ts=4: */

/*

 * parse_mode implementation for busybox

 *

 * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>

 *

 * Licensed under GPLv2 or later, see file LICENSE in this source tree.

 */

​

/* Mar 5, 2003    Manuel Novoa III

 *

 * This is the main work function for the 'mkdir' applet.  As such, it

 * strives to be SUSv3 compliant in it's behaviour when recursively

 * making missing parent dirs, and in it's mode setting of the final

 * directory 'path'.

 *

 * To recursively build all missing intermediate directories, make

 * sure that (flags & FILEUTILS_RECUR) is non-zero.  Newly created

 * intermediate directories will have at least u+wx perms.

 *

 * To set specific permissions on 'path', pass the appropriate 'mode'

 * val.  Otherwise, pass -1 to get default permissions.

 */

​

#include "libbb.h"

​

/* This function is used from NOFORK applets. It must not allocate anything */

​

int FAST_FUNC bb_make_directory(char *path, long mode, int flags)

{

    mode_t cur_mask;

    mode_t org_mask;

    const char *fail_msg;

    char *s;

    char c;

    struct stat st;

​

    /* "path" can be a result of dirname().

     * dirname("no_slashes") returns ".", possibly read-only.

     * musl dirname() can return read-only "/" too.

     * We need writable string. And for "/", "." (and ".."?)

     * nothing needs to be created anyway.

     */

    if (LONE_CHAR(path, '/'))

        return 0;

    if (path[0] == '.') {

        if (path[1] == '\0')

            return 0; /* "." */

//      if (path[1] == '.' && path[2] == '\0')

//          return 0; /* ".." */

    }

​

    org_mask = cur_mask = (mode_t)-1L;

    s = path;

    while (1) {

        c = '\0';

​

        if (flags & FILEUTILS_RECUR) {  /* Get the parent */

            /* Bypass leading non-'/'s and then subsequent '/'s */

            while (*s) {

                if (*s == '/') {

                    do {

                        ++s;