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/* 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 tarball for details.
*/
/* 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;
/* Happens on bb_make_directory(dirname("no_slashes"),...) */
if (LONE_CHAR(path, '.'))
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;
} while (*s == '/');
c = *s; /* Save the current char */
*s = '\0'; /* and replace it with nul */
break;
}
++s;
}
}
if (c != '\0') {
/* Intermediate dirs: must have wx for user */
if (cur_mask == (mode_t)-1L) { /* wasn't done yet? */
mode_t new_mask;
org_mask = umask(0);
cur_mask = 0;
/* Clear u=wx in umask - this ensures
* they won't be cleared on mkdir */
new_mask = (org_mask & ~(mode_t)0300);
//bb_error_msg("org_mask:%o cur_mask:%o", org_mask, new_mask);
if (new_mask != cur_mask) {
cur_mask = new_mask;
umask(new_mask);
}
}
} else {
/* Last component: uses original umask */
//bb_error_msg("1 org_mask:%o", org_mask);
if (org_mask != cur_mask) {
cur_mask = org_mask;
umask(org_mask);
}
}
if (mkdir(path, 0777) < 0) {
/* If we failed for any other reason than the directory
* already exists, output a diagnostic and return -1 */
if (errno != EEXIST
|| !(flags & FILEUTILS_RECUR)
|| ((stat(path, &st) < 0) || !S_ISDIR(st.st_mode))
) {
fail_msg = "create";
break;
}
/* Since the directory exists, don't attempt to change
* permissions if it was the full target. Note that
* this is not an error condition. */
if (!c) {
goto ret0;
}
}
if (!c) {
/* Done. If necessary, update perms on the newly
* created directory. Failure to update here _is_
* an error. */
if ((mode != -1) && (chmod(path, mode) < 0)) {
fail_msg = "set permissions of";
break;
}
goto ret0;
}
/* Remove any inserted nul from the path (recursive mode) */
*s = c;
} /* while (1) */
bb_perror_msg("can't %s directory '%s'", fail_msg, path);
flags = -1;
goto ret;
ret0:
flags = 0;
ret:
//bb_error_msg("2 org_mask:%o", org_mask);
if (org_mask != cur_mask)
umask(org_mask);
return flags;
}
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