/*
*
* Copyright (c) International Business Machines Corp., 2002
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will 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 to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* Description:
* Verifies that the group ID and setgid bit are
* set correctly when a new file is created using open.
*
* ALGORITHM
* Create two directories, one with the group ID of this process
* and the setgid bit not set, and the other with a group ID
* other than that of this process and with the setgid bit set.
* In each directory, create a file with and without the setgid
* bit set in the creation modes. Verify that the modes and group
* ID are correct on each of the 4 files.
* As root, create a file with the setgid bit on in the
* directory with the setgid bit.
* This tests the SVID3 create group semantics.
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <grp.h>
#include <pwd.h>
#include "test.h"
char *TCID = "open10";
int TST_TOTAL = 1;
static int local_flag;
#define PASSED 1
#define FAILED 0
#define MODE_RWX (S_IRWXU | S_IRWXG | S_IRWXO)
#define MODE_SGID (S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO)
#define DIR_A_TEMP "open10.testdir.A.%d"
#define DIR_B_TEMP "open10.testdir.B.%d"
#define SETGID "setgid"
#define NOSETGID "nosetgid"
#define ROOT_SETGID "root_setgid"
#define MSGSIZE 150
static void setup(void);
static void cleanup(void);
int main(int ac, char *av[])
{
int ret;
struct stat buf;
struct group *group;
struct passwd *user1;
char DIR_A[MSGSIZE], DIR_B[MSGSIZE];
char setgid_A[MSGSIZE], nosetgid_A[MSGSIZE];
char setgid_B[MSGSIZE], nosetgid_B[MSGSIZE], root_setgid_B[MSGSIZE];
gid_t group1_gid, group2_gid, mygid;
uid_t save_myuid, user1_uid;
pid_t mypid;
int lc;
int fail_count = 0;
tst_parse_opts(ac, av, NULL, NULL);
setup();
for (lc = 0; TEST_LOOPING(lc); lc++) {
local_flag = PASSED;
save_myuid = getuid();
mypid = getpid();
sprintf(DIR_A, DIR_A_TEMP, mypid);
sprintf(DIR_B, DIR_B_TEMP, mypid);
sprintf(setgid_A, "%s/%s", DIR_A, SETGID);
sprintf(nosetgid_A, "%s/%s", DIR_A, NOSETGID);
sprintf(setgid_B, "%s/%s", DIR_B, SETGID);
sprintf(nosetgid_B, "%s/%s", DIR_B, NOSETGID);
sprintf(root_setgid_B, "%s/%s", DIR_B, ROOT_SETGID);
/* Get the uid of user1 */
user1 = getpwnam("nobody");
if (user1 == NULL)
tst_brkm(TBROK, cleanup, "nobody not in /etc/passwd");
user1_uid = user1->pw_uid;
/*
* Get the group IDs of group1 and group2.
*/
group = getgrnam("nobody");
if (group == NULL) {
group = getgrnam("nogroup");
if (group == NULL) {
tst_brkm(TBROK, cleanup,
"nobody/nogroup not in /etc/group");
}
}
group1_gid = group->gr_gid;
#ifdef ANDROID
group = getgrnam("everybody");
if (group == NULL)
tst_brkm(TBROK, cleanup, "everybody not in /etc/group");
#else
group = getgrnam("bin");
if (group == NULL)
tst_brkm(TBROK, cleanup, "bin not in /etc/group");
#endif
group2_gid = group->gr_gid;
/*
* Create a directory with group id the same as this process
* and with no setgid bit.
*/
if (mkdir(DIR_A, MODE_RWX) < 0) {
tst_resm(TFAIL | TERRNO, "mkdir(%s) failed", DIR_A);
local_flag = FAILED;
}
if (chown(DIR_A, user1_uid, group2_gid) < 0) {
tst_resm(TFAIL | TERRNO, "chown(%s) failed", DIR_A);
local_flag = FAILED;
}
if (stat(DIR_A, &buf) < 0) {
tst_resm(TFAIL | TERRNO, "stat(%s) failed", DIR_A);
local_flag = FAILED;
}
/* Verify modes */
if (buf.st_mode & S_ISGID) {
tst_resm(TFAIL, "%s: Incorrect modes, setgid bit set",
DIR_A);
local_flag = FAILED;
}
/* Verify group ID */
if (buf.st_gid != group2_gid) {
tst_resm(TFAIL, "%s: Incorrect group (got %d and %d)",
DIR_A, buf.st_gid, group2_gid);
local_flag = FAILED;
}
/*
* Create a directory with group id different from that of
* this process and with the setgid bit set.
*/
if (mkdir(DIR_B, MODE_RWX) < 0) {
tst_resm(TFAIL | TERRNO, "mkdir(%s) failed", DIR_B);
local_flag = FAILED;
}
if (chown(DIR_B, user1_uid, group2_gid) < 0) {
tst_resm(TFAIL | TERRNO, "chown(%s) failed", DIR_B);
local_flag = FAILED;
}
if (chmod(DIR_B, MODE_SGID) < 0) {
tst_resm(TFAIL | TERRNO, "chmod(%s) failed", DIR_B);
local_flag = FAILED;
}
if (stat(DIR_B, &buf) < 0) {
tst_resm(TFAIL | TERRNO, "stat(%s) failed", DIR_B);
local_flag = FAILED;
}
/* Verify modes */
if (!(buf.st_mode & S_ISGID)) {
tst_resm(TFAIL,
"%s: Incorrect modes, setgid bit not set",
DIR_B);
local_flag = FAILED;
}
/* Verify group ID */
if (buf.st_gid != group2_gid) {
tst_resm(TFAIL, "%s: Incorrect group (got %d and %d)",
DIR_B, buf.st_gid, group2_gid);
local_flag = FAILED;
}
if (local_flag == PASSED) {
tst_resm(TPASS, "Test passed in block0.");
} else {
tst_resm(TFAIL, "Test failed in block0.");
fail_count++;
}
local_flag = PASSED;
/*
* Create two files in testdir.A, one with the setgid
* bit set in the creation modes and the other without.
* Both should inherit the group ID of the process and
* maintain the setgid bit as specified in the creation
* modes.
*/
if (setgid(group1_gid) < 0) {
tst_resm(TINFO,
"Unable to set process group ID to group1");
}
if (setreuid(-1, user1_uid) < 0)
tst_resm(TINFO, "Unable to set process uid to user1");
mygid = getgid();
/*
* Create the file with setgid not set
*/
ret = open(nosetgid_A, O_CREAT | O_EXCL | O_RDWR, MODE_RWX);
if (ret < 0) {
tst_resm(TFAIL | TERRNO, "open(%s) failed", nosetgid_A);
local_flag = FAILED;
}
close(ret);
if (stat(nosetgid_A, &buf) < 0) {
tst_resm(TFAIL | TERRNO, "stat(%s) failed", nosetgid_A);
local_flag = FAILED;
}
/* Verify modes */
if (buf.st_mode & S_ISGID) {
tst_resm(TFAIL, "%s: Incorrect modes, setgid bit set",
nosetgid_A);
local_flag = FAILED;
}
/* Verify group ID */
if (buf.st_gid != mygid) {
tst_resm(TFAIL, "%s: Incorrect group (got %d and %d)",
nosetgid_A, buf.st_gid, mygid);
local_flag = FAILED;
}
/*
* Create the file with setgid set
*/
ret = open(setgid_A, O_CREAT | O_EXCL | O_RDWR, MODE_SGID);
if (ret < 0) {
tst_resm(TFAIL | TERRNO, "open(%s) failed", setgid_A);
local_flag = FAILED;
}
close(ret);
if (stat(setgid_A, &buf) < 0) {
tst_resm(TFAIL | TERRNO, "stat(%s) failed", setgid_A);
local_flag = FAILED;
}
/* Verify modes */
if (!(buf.st_mode & S_ISGID)) {
tst_resm(TFAIL,
"%s: Incorrect modes, setgid bit not set",
setgid_A);
local_flag = FAILED;
}
/* Verify group ID */
if (buf.st_gid != mygid) {
tst_resm(TFAIL, "%s: Incorrect group (%d and %d)",
setgid_A, buf.st_gid, mygid);
local_flag = FAILED;
}
if (local_flag == PASSED) {
tst_resm(TPASS, "Test passed in block1.");
} else {
tst_resm(TFAIL, "Test failed in block1.");
fail_count++;
}
local_flag = PASSED;
/*
* Create two files in testdir.B, one with the setgid
* bit set in the creation modes and the other without.
* Both should inherit the group ID of the parent
* directory, group2. Either file should have the segid
* bit set in the modes.
*/
/*
* Create the file with setgid not set
*/
ret = open(nosetgid_B, O_CREAT | O_EXCL | O_RDWR, MODE_RWX);
if (ret < 0) {
tst_resm(TFAIL | TERRNO, "open(%s) failed", nosetgid_B);
local_flag = FAILED;
}
close(ret);
if (stat(nosetgid_B, &buf) < 0) {
tst_resm(TFAIL | TERRNO, "stat(%s) failed", nosetgid_B);
local_flag = FAILED;
}
/* Verify modes */
if (buf.st_mode & S_ISGID) {
tst_resm(TFAIL,
"%s: Incorrect modes, setgid bit should be set",
nosetgid_B);
local_flag = FAILED;
}
/* Verify group ID */
if (buf.st_gid != group2_gid) {
tst_resm(TFAIL, "%s: Incorrect group (got %d and %d)",
nosetgid_B, buf.st_gid, group2_gid);
local_flag = FAILED;
}
/*
* Create the file with setgid set
*/
ret = open(setgid_B, O_CREAT | O_EXCL | O_RDWR, MODE_SGID);
if (ret < 0) {
tst_resm(TFAIL | TERRNO, "open(%s) failed", setgid_B);
local_flag = FAILED;
}
close(ret);
if (stat(setgid_B, &buf) < 0) {
tst_resm(TFAIL | TERRNO, "stat(%s) failed", setgid_B);
local_flag = FAILED;
}
/* Verify group ID */
if (buf.st_gid != group2_gid) {
tst_resm(TFAIL, "%s: Incorrect group (got %d and %d)",
setgid_B, buf.st_gid, group2_gid);
local_flag = FAILED;
}
/* Verify modes */
if (!(buf.st_mode & S_ISGID)) {
tst_resm(TFAIL,
"%s: Incorrect modes, setgid bit not set",
setgid_B);
local_flag = FAILED;
}
if (local_flag == PASSED) {
tst_resm(TPASS, "Test passed in block2.");
} else {
tst_resm(TFAIL, "Test failed in block2.");
fail_count++;
}
local_flag = PASSED;
/*
* Create a file in testdir.B, with the setgid bit set
* in the creation modes and do so as root. The file
* should inherit the group ID of the parent directory,
* group2 and should have the setgid bit set.
*/
/* Become root again */
if (setreuid(-1, save_myuid) < 0) {
tst_resm(TFAIL | TERRNO,
"Changing back to root failed");
local_flag = FAILED;
}
/* Create the file with setgid set */
ret = open(root_setgid_B, O_CREAT | O_EXCL | O_RDWR, MODE_SGID);
if (ret < 0) {
tst_resm(TFAIL | TERRNO, "open(%s) failed",
root_setgid_B);
local_flag = FAILED;
}
close(ret);
if (stat(root_setgid_B, &buf) < 0) {
tst_resm(TFAIL | TERRNO, "stat(%s) failed",
root_setgid_B);
local_flag = FAILED;
}
/* Verify modes */
if (!(buf.st_mode & S_ISGID)) {
tst_resm(TFAIL,
"%s: Incorrect modes, setgid bit not set",
root_setgid_B);
local_flag = FAILED;
}
/* Verify group ID */
if (buf.st_gid != group2_gid) {
tst_resm(TFAIL, "%s: Incorrect group (got %d and %d)",
root_setgid_B, buf.st_gid, group2_gid);
local_flag = FAILED;
}
if (local_flag == PASSED) {
tst_resm(TPASS, "Test passed in block3.");
} else {
tst_resm(TFAIL, "Test failed in block3.");
fail_count++;
}
/*
* Clean up any files created by test before call to anyfail.
* Remove the directories.
*/
if (unlink(setgid_A) < 0)
tst_resm(TWARN | TERRNO, "unlink(%s) failed", setgid_A);
if (unlink(nosetgid_A) < 0)
tst_resm(TWARN | TERRNO, "unlink(%s) failed",
nosetgid_A);
if (rmdir(DIR_A) < 0)
tst_resm(TWARN | TERRNO, "rmdir(%s) failed", DIR_A);
if (unlink(setgid_B) < 0)
tst_resm(TWARN | TERRNO, "unlink(%s) failed", setgid_B);
if (unlink(root_setgid_B) < 0)
tst_resm(TWARN | TERRNO, "unlink(%s) failed",
root_setgid_B);
if (unlink(nosetgid_B) < 0)
tst_resm(TWARN | TERRNO, "unlink(%s) failed",
nosetgid_B);
if (rmdir(DIR_B) < 0)
tst_resm(TWARN | TERRNO, "rmdir(%s) failed", DIR_B);
if (fail_count == 0) {
tst_resm(TPASS, "Test passed.");
} else {
tst_resm(TFAIL,
"Test failed because of above failures.");
}
}
cleanup();
tst_exit();
}
static void setup(void)
{
tst_require_root();
tst_sig(NOFORK, DEF_HANDLER, cleanup);
TEST_PAUSE;
tst_tmpdir();
}
static void cleanup(void)
{
tst_rmdir();
}