minmode.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1990-2002 Sun Microsystems, Inc. All Rights Reserved.
*
*/
#ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#define USAGE "Usage: minmode pathname mode\n"
/* minmode: takes a pathname and a mode representation in octal, sets
* the new mode to be stricter than both the current mode and the specified
* mode.
* If successful, prints the new mode (exit status = 0);
* if unsuccessful, prints the usage message (exit status = -1).
*/
main(int argc, char **argv)
{
char *bufp;
struct stat sbuf;
long mode, perm, sbits;
long currmode, currperm, currsbits;
long newmode, newperm, newsbits;
long strtol();
void perror();
if (argc != 3) {
printf("%s\n", USAGE);
exit(1);
}
mode = strtol(argv[2], &bufp, 8);
if (*bufp != '\0') {
printf("minmode: invalid mode - %s\n", argv[2]);
printf("%s\n", USAGE);
exit(1);
}
if (stat(argv[1], &sbuf)) {
printf("minmode: can't stat %s\n", argv[1]);
perror(0);
printf("%s\n", USAGE);
exit(1);
}
currmode = ((long) sbuf.st_mode) & 07777;
perm = mode & 0777;
sbits = mode & 007000;
currperm = currmode & 0777;
currsbits = currmode & 007000;
newperm = perm & currperm;
newsbits = sbits | currsbits;
newmode = newsbits | newperm;
if (newmode == currmode)
exit(1);
printf("%o\n", newmode);
exit(0);
}