| /* |
| Copyright (c) 2002-2003, Intel Corporation. All rights reserved. |
| Created by: majid.awad REMOVE-THIS AT intel DOT com |
| This file is licensed under the GPL license. For the full content |
| of this license, see the COPYING file at the top level of this |
| source tree. |
| */ |
| /* |
| open_sem test case that attempts to open a new semaphore with read |
| permissions, close it, then create the same semaphore with write |
| permissions which should come up with denial access. |
| */ |
| |
| #define _XOPEN_SOURCE 600 |
| |
| #include <sys/types.h> |
| #include <pwd.h> |
| #include <string.h> |
| #include <stdio.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <semaphore.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include "posixtest.h" |
| |
| #define TEST "3-1" |
| #define FUNCTION "sem_open" |
| #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": " |
| |
| /** Set the euid of this process to a non-root uid */ |
| int set_nonroot() |
| { |
| struct passwd *pw; |
| setpwent(); |
| /* search for the first user which is non root */ |
| while ((pw = getpwent()) != NULL) |
| if (strcmp(pw->pw_name, "root")) |
| break; |
| endpwent(); |
| if (pw == NULL) { |
| printf("There is no other user than current and root.\n"); |
| return 1; |
| } |
| |
| if (seteuid(pw->pw_uid) != 0) { |
| if (errno == EPERM) { |
| printf("You don't have permission to change your UID.\n"); |
| return 1; |
| } |
| perror("An error occurs when calling seteuid()"); |
| return 1; |
| } |
| |
| printf("Testing with user '%s' (uid: %d)\n", |
| pw->pw_name, (int)geteuid()); |
| return 0; |
| } |
| int main() |
| { |
| sem_t *mysemp; |
| char semname[50]; |
| |
| if (getuid() == 0) { |
| if (set_nonroot() != 0) { |
| printf("Cannot run this test as non-root user\n"); |
| return PTS_UNTESTED; |
| } |
| } |
| |
| sprintf(semname, "/" FUNCTION "_" TEST "_%d", getpid()); |
| |
| /*Trying to open the first Sem with read mode */ |
| mysemp = sem_open(semname, O_CREAT, 0444, 1); |
| |
| /* Opening the same existance SEM with write mode */ |
| mysemp = sem_open(semname, O_CREAT, 0222 , 1); |
| |
| if (mysemp != SEM_FAILED) |
| { |
| perror(ERROR_PREFIX "sem_open"); |
| return PTS_UNRESOLVED; |
| } |
| |
| if (errno == EACCES) { |
| puts("TEST PASSED"); |
| sem_unlink(semname); |
| return PTS_PASS; |
| } else { |
| puts("TEST FAILED"); |
| return PTS_FAIL; |
| } |
| } |