freebsd-skq/bin/mkdir/mkdir.c
1998-10-23 06:28:40 +00:00

199 lines
5.0 KiB
C

/*
* Copyright (c) 1983, 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char const copyright[] =
"@(#) Copyright (c) 1983, 1992, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)mkdir.c 8.2 (Berkeley) 1/25/94";
#endif
static const char rcsid[] =
"$Id: mkdir.c,v 1.13 1998/10/20 08:04:15 msmith Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int build __P((char *, mode_t));
void usage __P((void));
int
main(argc, argv)
int argc;
char *argv[];
{
int ch, exitval, success, omode, pflag;
mode_t *set = (mode_t *)NULL;
char *mode;
omode = pflag = 0;
mode = NULL;
while ((ch = getopt(argc, argv, "m:p")) != -1)
switch(ch) {
case 'p':
pflag = 1;
break;
case 'm':
mode = optarg;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argv[0] == NULL)
usage();
if (mode == NULL) {
omode = S_IRWXU | S_IRWXG | S_IRWXO;
} else {
if ((set = setmode(mode)) == NULL)
errx(1, "invalid file mode: %s", mode);
omode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
}
for (exitval = 0; *argv != NULL; ++argv) {
success = 1;
if (pflag) {
if (build(*argv, omode))
success = 0;
} else if (mkdir(*argv, omode) < 0) {
warn("%s", *argv);
success = 0;
}
if (!success)
exitval = 1;
/*
* The mkdir() and umask() calls both honor only the low
* nine bits, so if you try to set a mode including the
* sticky, setuid, setgid bits you lose them. Don't do
* this unless the user has specifically requested a mode,
* as chmod will (obviously) ignore the umask.
*/
if (success && mode != NULL && chmod(*argv, omode) == -1) {
warn("%s", *argv);
exitval = 1;
}
}
exit(exitval);
}
int
build(path, omode)
char *path;
mode_t omode;
{
struct stat sb;
mode_t numask, oumask;
int first, last, retval;
char *p;
p = path;
oumask = 0;
retval = 0;
if (p[0] == '/') /* Skip leading '/'. */
++p;
for (first = 1, last = 0; !last ; ++p) {
if (p[0] == '\0')
last = 1;
else if (p[0] != '/')
continue;
*p = '\0';
if (p[1] == '\0')
last = 1;
if (first) {
/*
* POSIX 1003.2:
* For each dir operand that does not name an existing
* directory, effects equivalent to those cased by the
* following command shall occcur:
*
* mkdir -p -m $(umask -S),u+wx $(dirname dir) &&
* mkdir [-m mode] dir
*
* We change the user's umask and then restore it,
* instead of doing chmod's.
*/
oumask = umask(0);
numask = oumask & ~(S_IWUSR | S_IXUSR);
(void)umask(numask);
first = 0;
}
if (last)
(void)umask(oumask);
if (stat(path, &sb)) {
if (errno != ENOENT ||
mkdir(path, last ? omode :
S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
warn("%s", path);
retval = 1;
break;
}
}
else if ((sb.st_mode & S_IFMT) != S_IFDIR) {
if (last)
errno = EEXIST;
else
errno = ENOTDIR;
warn("%s", path);
retval = 1;
break;
}
if (!last)
*p = '/';
}
if (!first && !last)
(void)umask(oumask);
return (retval);
}
void
usage()
{
(void)fprintf(stderr, "usage: mkdir [-p] [-m mode] directory ...\n");
exit (1);
}