| /* |
| * Copyright (c) 2002-2003, Intel Corporation. All rights reserved. |
| * Created by: salwan.searty 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. |
| |
| This program tests the assertion that if the user id of the sending process |
| doesn't match the user id of the receiving process (pid), then the sigqueue |
| function will fail with errno set to EPERM, unless the sending process |
| has appropriate privileges. |
| |
| Since process pid 1 (init) is not killable by even root, it is used as a the receiving |
| process. Even if process id 1 is killable, this test is still safe because the |
| value of the sig parameter is 0. |
| |
| */ |
| |
| |
| #include <signal.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <pwd.h> |
| #include <string.h> |
| #include "posixtest.h" |
| |
| /** 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 (setuid(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)(euid: %d)\n", |
| pw->pw_name, (int)getuid(), (int)geteuid()); |
| return 0; |
| } |
| |
| int main(void) |
| { |
| |
| union sigval value; |
| value.sival_int = 0; /* 0 is just an arbitrary value */ |
| |
| /* We assume process Number 1 is created by root */ |
| /* and can only be accessed by root */ |
| /* This test should be run under standard user permissions */ |
| if (getuid() == 0) { |
| if (set_nonroot() != 0) { |
| printf("Cannot run this test as non-root user\n"); |
| return PTS_UNTESTED; |
| } |
| } |
| |
| if (sigqueue(1, 0, value) != -1) { |
| printf |
| ("Test FAILED: sigqueue() succeeded even though this program's user id did not match the recieving process's user id\n"); |
| return PTS_FAIL; |
| } |
| |
| if (EPERM != errno) { |
| printf("Test FAILED: EPERM error not received\n"); |
| return PTS_FAIL; |
| } |
| |
| return PTS_PASS; |
| } |