| /* |
| * 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; |
| } |