mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Nathan Scott
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
/*
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* Copyright (c) 2004 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* tests out if access checking is done on write path
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* 1. opens with write perms
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* 2. fchmod to turn off write perms
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* 3. writes to file
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*/
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <string.h>
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#include <fcntl.h>
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#include <stdio.h>
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int
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main(int argc, char* argv[])
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{
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char *path;
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int fd;
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char *buf = "hi there";
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ssize_t x;
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int sts;
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if (argc != 2) {
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fprintf(stderr, "%s: requires path argument\n", argv[0]);
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return 1;
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}
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path = argv[1];
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printf("open for write \"%s\" with 777\n", path);
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fd = open(path, O_RDWR, 0777);
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if (fd == -1) {
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perror("open");
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return 1;
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}
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printf("remove perms on file\n");
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sts = fchmod(fd, 0);
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if (sts == -1) {
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perror("fchmod");
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return 1;
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}
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printf("write to the file\n");
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x = write(fd, buf, strlen(buf)+1);
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if (x == -1) {
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perror("write");
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return 1;
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}
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return 0;
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}
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