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Add -m option to specify a creation mode whcih is not affected by

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the umask of the calling process.

PR:	13365
Reported by:	James Howard <howardjp@wam.umd.edu>
Reviewed by:	bde
This commit is contained in:
Sheldon Hearn 1999-08-27 10:40:27 +00:00
parent 1428ce0f83
commit 513c0475ca
2 changed files with 59 additions and 9 deletions
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33
usr.bin/mkfifo/mkfifo.1
View File

@ -33,7 +33,7 @@
.\" SUCH DAMAGE.
.\"
.\" @(#)mkfifo.1 8.2 (Berkeley) 1/5/94
.\" $Id$
.\" $Id: mkfifo.1,v 1.4 1997/04/27 08:45:45 jmg Exp $
.\"
.Dd January 5, 1994
.Dt MKFIFO 1
@ -43,14 +43,39 @@
.Nd make fifos
.Sh SYNOPSIS
.Nm
.Op Fl m Ar mode
.Ar fifo_name ...
.Sh DESCRIPTION
The
.Nm
command creates the fifos requested, in the order specified,
using mode
.Li \&0777 .
command creates the fifos requested, in the order specified.
.Pp
The options are as follows:
.Bl -tag -width indent
.It Fl m
Set the file permission bits of the created fifos to the
specified mode, ignoring the
.Xr umask 2
of the calling process.
The mode argument takes any format that can be specified to the
.Xr chmod 1
command.
If a symbolic mode is specified, the op symbols
.Dq +
(plus) and
.Dq -
(hyphen) are interpreted relative to an assumed initial mode of
.Dq a=rw
(read and write permissions for all).
.El
.Pp
If the
.Fl m
option is not specified, fifos are created with mode
.Li \&0666
modified by the
.Xr umask 2
of the calling process.
The
.Nm
command requires write permission in the parent directory.

35
usr.bin/mkfifo/mkfifo.c
View File

@ -42,29 +42,41 @@ static const char copyright[] =
static char sccsid[] = "@(#)mkfifo.c 8.2 (Berkeley) 1/5/94";
#endif
static const char rcsid[] =
"$Id$";
"$Id: mkfifo.c,v 1.3 1997/07/24 07:02:55 charnier Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#define BASEMODE S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | \
S_IROTH | S_IWOTH
static void usage __P((void));
static int f_mode;
int
main(argc, argv)
int argc;
char *argv[];
{
extern int optind;
char *modestr;
void *modep;
mode_t fifomode;
int ch, exitval;
while ((ch = getopt(argc, argv, "")) != -1)
while ((ch = getopt(argc, argv, "m:")) != -1)
switch(ch) {
case 'm':
f_mode = 1;
modestr = optarg;
break;
case '?':
default:
usage();
@ -74,8 +86,21 @@ main(argc, argv)
if (argv[0] == NULL)
usage();
if (f_mode) {
umask(0);
errno = 0;
if ((modep = setmode(modestr)) == NULL) {
if (errno)
err(1, "setmode");
errx(1, "invalid file mode: %s", modestr);
}
fifomode = getmode(modep, BASEMODE);
} else {
fifomode = BASEMODE;
}
for (exitval = 0; *argv != NULL; ++argv)
if (mkfifo(*argv, S_IRWXU | S_IRWXG | S_IRWXO) < 0) {
if (mkfifo(*argv, fifomode) < 0) {
warn("%s", *argv);
exitval = 1;
}
@ -85,6 +110,6 @@ main(argc, argv)
static void
usage()
{
(void)fprintf(stderr, "usage: mkfifo fifoname ...\n");
(void)fprintf(stderr, "usage: mkfifo [-m mode] fifo_name ...\n");
exit(1);
}