457 lines
12 KiB
C
457 lines
12 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2002
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will 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
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* the 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 to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* NAME
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* creat08.c - Verifies that the group ID and setgid bit are
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* set correctly when a new file is created.
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* (ported from SPIE, section2/iosuite/creat5.c,
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* by Airong Zhang <zhanga@us.ibm.com>)
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* CALLS
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* creat
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*
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* ALGORITHM
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* Create two directories, one with the group ID of this process
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* and the setgid bit not set, and the other with a group ID
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* other than that of this process and with the setgid bit set.
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* In each directory, create a file with and without the setgid
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* bit set in the creation modes. Verify that the modes and group
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* ID are correct on each of the 4 files.
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* As root, create a file with the setgid bit on in the
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* directory with the setgid bit.
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* This tests the SVID3 create group semantics.
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*
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* USAGE
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* creat08
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*
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* RESTRICTIONS
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*
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*/
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#include <stdio.h> /* needed by testhead.h */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <grp.h>
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#include <pwd.h>
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#include "test.h"
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#include "safe_macros.h"
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char *TCID = "creat08";
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int TST_TOTAL = 1;
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int local_flag;
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#define PASSED 1
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#define FAILED 0
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#define MODE_RWX (S_IRWXU|S_IRWXG|S_IRWXO)
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#define MODE_SGID (S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
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#define DIR_A_TEMP "testdir.A.%d"
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#define DIR_B_TEMP "testdir.B.%d"
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#define SETGID "setgid"
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#define NOSETGID "nosetgid"
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#define ROOT_SETGID "root_setgid"
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#define MSGSIZE 150
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static void tst_cleanup(void);
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static void cleanup(void);
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static void setup(void);
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static char DIR_A[MSGSIZE], DIR_B[MSGSIZE];
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static char setgid_A[MSGSIZE], nosetgid_A[MSGSIZE];
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static char setgid_B[MSGSIZE], nosetgid_B[MSGSIZE], root_setgid_B[MSGSIZE];
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int main(int ac, char **av)
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{
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struct stat buf;
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struct group *group;
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struct passwd *user1;
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gid_t group1_gid, group2_gid, mygid;
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uid_t save_myuid, user1_uid;
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pid_t mypid;
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int fd;
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int lc;
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tst_parse_opts(ac, av, NULL, NULL);
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setup();
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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local_flag = PASSED;
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save_myuid = getuid();
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mypid = getpid();
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sprintf(DIR_A, DIR_A_TEMP, mypid);
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sprintf(DIR_B, DIR_B_TEMP, mypid);
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sprintf(setgid_A, "%s/%s", DIR_A, SETGID);
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sprintf(nosetgid_A, "%s/%s", DIR_A, NOSETGID);
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sprintf(setgid_B, "%s/%s", DIR_B, SETGID);
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sprintf(nosetgid_B, "%s/%s", DIR_B, NOSETGID);
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sprintf(root_setgid_B, "%s/%s", DIR_B, ROOT_SETGID);
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/* Get the uid of user1 */
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if ((user1 = getpwnam("nobody")) == NULL) {
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tst_brkm(TBROK | TERRNO, NULL,
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"getpwnam(\"nobody\") failed");
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}
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user1_uid = user1->pw_uid;
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/*
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* Get the group IDs of group1 and group2.
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*/
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if ((group = getgrnam("nobody")) == NULL) {
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if ((group = getgrnam("nogroup")) == NULL) {
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tst_brkm(TBROK | TERRNO, cleanup,
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"getgrnam(\"nobody\") and "
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"getgrnam(\"nogroup\") failed");
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}
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}
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group1_gid = group->gr_gid;
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if ((group = getgrnam("bin")) == NULL) {
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tst_brkm(TBROK | TERRNO, cleanup,
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"getgrnam(\"bin\") failed");
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}
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group2_gid = group->gr_gid;
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/*--------------------------------------------------------------*/
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/* Block0: Set up the parent directories */
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/*--------------------------------------------------------------*/
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/*
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* Create a directory with group id the same as this process
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* and with no setgid bit.
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*/
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if (mkdir(DIR_A, MODE_RWX) == -1) {
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tst_resm(TFAIL, "Creation of %s failed", DIR_A);
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local_flag = FAILED;
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}
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if (chown(DIR_A, user1_uid, group2_gid) == -1) {
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tst_resm(TFAIL, "Chown of %s failed", DIR_A);
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local_flag = FAILED;
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}
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if (stat(DIR_A, &buf) == -1) {
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tst_resm(TFAIL, "Stat of %s failed", DIR_A);
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local_flag = FAILED;
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}
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/* Verify modes */
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if (buf.st_mode & S_ISGID) {
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tst_resm(TFAIL, "%s: Incorrect modes, setgid bit set",
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DIR_A);
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local_flag = FAILED;
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}
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/* Verify group ID */
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if (buf.st_gid != group2_gid) {
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tst_resm(TFAIL, "%s: Incorrect group", DIR_A);
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tst_resm(TINFO, "got %u and %u", buf.st_gid,
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group2_gid);
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local_flag = FAILED;
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}
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/*
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* Create a directory with group id different from that of
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* this process and with the setgid bit set.
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*/
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if (mkdir(DIR_B, MODE_RWX) == -1) {
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tst_resm(TFAIL, "Creation of %s failed", DIR_B);
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local_flag = FAILED;
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}
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if (chown(DIR_B, user1_uid, group2_gid) == -1) {
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tst_resm(TFAIL, "Chown of %s failed", DIR_B);
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local_flag = FAILED;
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}
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if (chmod(DIR_B, MODE_SGID) == -1) {
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tst_resm(TFAIL, "Chmod of %s failed", DIR_B);
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local_flag = FAILED;
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}
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if (stat(DIR_B, &buf) == -1) {
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tst_resm(TFAIL, "Stat of %s failed", DIR_B);
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local_flag = FAILED;
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}
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/* Verify modes */
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if (!(buf.st_mode & S_ISGID)) {
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tst_resm(TFAIL,
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"%s: Incorrect modes, setgid bit not set",
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DIR_B);
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local_flag = FAILED;
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}
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/* Verify group ID */
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if (buf.st_gid != group2_gid) {
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tst_resm(TFAIL, "%s: Incorrect group", DIR_B);
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tst_resm(TINFO, "got %u and %u", buf.st_gid,
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group2_gid);
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local_flag = FAILED;
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}
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if (local_flag == PASSED) {
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tst_resm(TPASS, "Test passed in block0.");
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} else {
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tst_resm(TFAIL, "Test failed in block0.");
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}
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local_flag = PASSED;
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/*--------------------------------------------------------------*/
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/* Block1: Create two files in testdir.A, one with the setgid */
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/* bit set in the creation modes and the other without. */
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/* Both should inherit the group ID of the process and */
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/* maintain the setgid bit as specified in the creation */
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/* modes. */
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/*--------------------------------------------------------------*/
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/*
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* Now become user1, group1
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*/
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if (setgid(group1_gid) == -1) {
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tst_resm(TINFO,
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"Unable to set process group ID to group1");
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}
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if (setreuid(-1, user1_uid) == -1) {
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tst_resm(TINFO, "Unable to set process uid to user1");
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}
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mygid = getgid();
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/*
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* Create the file with setgid not set
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*/
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fd = open(nosetgid_A, O_CREAT | O_EXCL | O_RDWR, MODE_RWX);
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if (fd == -1) {
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tst_resm(TFAIL, "Creation of %s failed", nosetgid_A);
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local_flag = FAILED;
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}
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if (stat(nosetgid_A, &buf) == -1) {
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tst_resm(TFAIL, "Stat of %s failed", nosetgid_A);
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local_flag = FAILED;
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}
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/* Verify modes */
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if (buf.st_mode & S_ISGID) {
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tst_resm(TFAIL, "%s: Incorrect modes, setgid bit set",
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nosetgid_A);
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local_flag = FAILED;
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}
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/* Verify group ID */
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if (buf.st_gid != mygid) {
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tst_resm(TFAIL, "%s: Incorrect group", nosetgid_A);
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local_flag = FAILED;
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}
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close(fd);
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/*
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* Create the file with setgid set
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*/
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fd = open(setgid_A, O_CREAT | O_EXCL | O_RDWR, MODE_SGID);
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if (fd == -1) {
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tst_resm(TFAIL, "Creation of %s failed", setgid_A);
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local_flag = FAILED;
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}
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if (stat(setgid_A, &buf) == -1) {
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tst_resm(TFAIL, "Stat of %s failed", setgid_A);
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local_flag = FAILED;
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}
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/* Verify modes */
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if (!(buf.st_mode & S_ISGID)) {
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tst_resm(TFAIL,
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"%s: Incorrect modes, setgid bit not set",
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setgid_A);
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local_flag = FAILED;
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}
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/* Verify group ID */
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if (buf.st_gid != mygid) {
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tst_resm(TFAIL, "%s: Incorrect group", setgid_A);
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tst_resm(TINFO, "got %u and %u", buf.st_gid, mygid);
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local_flag = FAILED;
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}
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close(fd);
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if (local_flag == PASSED) {
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tst_resm(TPASS, "Test passed in block1.");
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} else {
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tst_resm(TFAIL, "Test failed in block1.");
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}
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local_flag = PASSED;
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/*--------------------------------------------------------------*/
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/* Block2: Create two files in testdir.B, one with the setgid */
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/* bit set in the creation modes and the other without. */
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/* Both should inherit the group ID of the parent */
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/* directory, group2. */
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/*--------------------------------------------------------------*/
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/*
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* Create the file with setgid not set
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*/
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fd = creat(nosetgid_B, MODE_RWX);
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if (fd == -1) {
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tst_resm(TFAIL, "Creation of %s failed", nosetgid_B);
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local_flag = FAILED;
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}
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if (stat(nosetgid_B, &buf) == -1) {
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tst_resm(TFAIL, "Stat of %s failed", nosetgid_B);
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local_flag = FAILED;
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}
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/* Verify modes */
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if (buf.st_mode & S_ISGID) {
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tst_resm(TFAIL,
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"%s: Incorrect modes, setgid bit should not be set",
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nosetgid_B);
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local_flag = FAILED;
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}
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/* Verify group ID */
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if (buf.st_gid != group2_gid) {
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tst_resm(TFAIL, "%s: Incorrect group", nosetgid_B);
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local_flag = FAILED;
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}
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close(fd);
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/*
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* Create the file with setgid set
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*/
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fd = creat(setgid_B, MODE_SGID);
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if (fd == -1) {
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tst_resm(TFAIL, "Creation of %s failed", setgid_B);
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local_flag = FAILED;
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}
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if (stat(setgid_B, &buf) == -1) {
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tst_resm(TFAIL, "Stat of %s failed", setgid_B);
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local_flag = FAILED;
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}
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/* Verify group ID */
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if (buf.st_gid != group2_gid) {
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tst_resm(TFAIL, "%s: Incorrect group", setgid_B);
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tst_resm(TFAIL, "got %u and %u", buf.st_gid,
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group2_gid);
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local_flag = FAILED;
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}
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/*
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* Skip S_ISGID check
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* 0fa3ecd87848 ("Fix up non-directory creation in SGID directories")
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* clears S_ISGID for files created by non-group members
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*/
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close(fd);
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if (local_flag == PASSED) {
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tst_resm(TPASS, "Test passed in block2.");
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} else {
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tst_resm(TFAIL, "Test failed in block2.");
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}
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local_flag = PASSED;
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/*--------------------------------------------------------------*/
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/* Block3: Create a file in testdir.B, with the setgid bit set */
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/* in the creation modes and do so as root. The file */
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/* should inherit the group ID of the parent directory, */
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/* group2 and should have the setgid bit set. */
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/*--------------------------------------------------------------*/
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/* Become root again */
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if (setreuid(-1, save_myuid) == -1) {
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tst_resm(TFAIL | TERRNO,
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"Changing back to root failed");
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local_flag = FAILED;
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}
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/* Create the file with setgid set */
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fd = creat(root_setgid_B, MODE_SGID);
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if (fd == -1) {
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tst_resm(TFAIL, "Creation of %s failed", root_setgid_B);
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local_flag = FAILED;
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}
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if (stat(root_setgid_B, &buf) == -1) {
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tst_resm(TFAIL, "Stat of %s failed", root_setgid_B);
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local_flag = FAILED;
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}
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/* Verify modes */
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if (!(buf.st_mode & S_ISGID)) {
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tst_resm(TFAIL,
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"%s: Incorrect modes, setgid bit not set",
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root_setgid_B);
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local_flag = FAILED;
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}
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/* Verify group ID */
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if (buf.st_gid != group2_gid) {
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tst_resm(TFAIL, "%s: Incorrect group", root_setgid_B);
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tst_resm(TINFO, "got %u and %u", buf.st_gid,
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group2_gid);
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local_flag = FAILED;
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}
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close(fd);
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if (local_flag == PASSED) {
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tst_resm(TPASS, "Test passed in block3");
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} else {
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tst_resm(TFAIL, "Test failed in block3");
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}
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tst_cleanup();
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}
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cleanup();
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tst_exit();
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}
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static void setup(void)
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{
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tst_require_root();
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tst_tmpdir();
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}
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static void tst_cleanup(void)
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{
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if (unlink(setgid_A) == -1) {
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tst_resm(TBROK, "%s failed", setgid_A);
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}
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if (unlink(nosetgid_A) == -1) {
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tst_resm(TBROK, "unlink %s failed", nosetgid_A);
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}
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SAFE_RMDIR(NULL, DIR_A);
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SAFE_UNLINK(NULL, setgid_B);
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SAFE_UNLINK(NULL, root_setgid_B);
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SAFE_UNLINK(NULL, nosetgid_B);
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SAFE_RMDIR(NULL, DIR_B);
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}
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static void cleanup(void)
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{
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tst_rmdir();
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}
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