File: [Development] / xfs-cmds / xfstests / src / writemod.c (download)
Revision 1.4, Wed Nov 9 02:50:19 2005 UTC (11 years, 11 months ago) by nathans.longdrop.melbourne.sgi.com
Branch: MAIN
CVS Tags: HEAD Changes since 1.3: +14 -28
lines
Update copyright annotations and license boilerplates to correspond with SGI Legals preferences.
Merge of master-melb:xfs-cmds:24329a by kenmcd.
|
/*
* Copyright (c) 2004 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* tests out if access checking is done on write path
* 1. opens with write perms
* 2. fchmod to turn off write perms
* 3. writes to file
*/
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <fcntl.h>
#include <stdio.h>
int
main(int argc, char* argv[])
{
char *path;
int fd;
char *buf = "hi there";
ssize_t x;
int sts;
if (argc != 2) {
fprintf(stderr, "%s: requires path argument\n", argv[0]);
return 1;
}
path = argv[1];
printf("open for write \"%s\" with 777\n", path);
fd = open(path, O_RDWR, 0777);
if (fd == -1) {
perror("open");
return 1;
}
printf("remove perms on file\n");
sts = fchmod(fd, 0);
if (sts == -1) {
perror("fchmod");
return 1;
}
printf("write to the file\n");
x = write(fd, buf, strlen(buf)+1);
if (x == -1) {
perror("write");
return 1;
}
return 0;
}