353 lines
8.9 KiB
C
353 lines
8.9 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2001
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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: vfork01
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*
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* Test Description:
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* Fork a process using vfork() and verify that, the attribute values like
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* euid, ruid, suid, egid, rgid, sgid, umask, inode and device number of
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* root and current working directories are same as that of the parent
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* process.
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* $
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* Expected Result:
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* The attribute values like euid, ruid, suid, egid, rgid, sgid, umask, inode
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* and device number of root and current working directory of the parent and
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* child processes should be equal.
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*
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* Algorithm:
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* Setup:
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* Setup signal handling.
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* Pause for SIGUSR1 if option specified.
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*
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* Test:
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* Loop if the proper options are given.
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* Execute system call
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* Check return code, if system call failed (return=-1)
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* Log the errno and Issue a FAIL message.
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* Otherwise,
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* Verify the Functionality of system call
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* if successful,
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* Issue Functionality-Pass message.
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* Otherwise,
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* Issue Functionality-Fail message.
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* Cleanup:
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* Print errno log and/or timing stats if options given
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*
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* Usage: <for command-line>
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* vfork01 [-c n] [-e] [-f] [-i n] [-I x] [-p x] [-t]
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* where, -c n : Run n copies concurrently.
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* -e : Turn on errno logging.
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* -f : Turn off functionality Testing.
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* -i n : Execute test n times.
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* -I x : Execute test for x seconds.
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* -P x : Pause for x seconds between iterations.
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* -t : Turn on syscall timing.
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*
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* History
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* 07/2001 John George
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* -Ported
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*
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* Restrictions:
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* None.
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*
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*/
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#define _GNU_SOURCE 1
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#include <stdio.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <signal.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include "test.h"
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char *TCID = "vfork01";
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int TST_TOTAL = 1;
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/* Variables to hold parent/child eff/real/saved uid/gid values */
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uid_t Peuid, Ceuid, Csuid, Psuid, Pruid, Cruid;
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gid_t Pegid, Cegid, Psgid, Csgid, Prgid, Crgid;
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mode_t Pumask, Cumask;
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char *Pcwd, *Ccwd; /*
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* pathname of working directory of
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* child/parent process.
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*/
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/* stat structure to hold directory/inode information for parent/child */
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struct stat StatPbuf;
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struct stat StatCbuf;
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struct stat Stat_cwd_Pbuf;
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struct stat Stat_cwd_Cbuf;
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void setup(); /* Main setup function of test */
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void cleanup(); /* cleanup function for the test */
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int main(int ac, char **av)
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{
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int lc;
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pid_t cpid; /* process id of the child process */
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int exit_status; /* exit status of child process */
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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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tst_count = 0;
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/*
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* Call vfork(2) to create a child process without
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* fully copying the address space of parent.
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*/
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TEST(vfork());
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if ((cpid = TEST_RETURN) == -1) {
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tst_resm(TFAIL, "vfork() Failed, errno=%d : %s",
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TEST_ERRNO, strerror(TEST_ERRNO));
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} else if (cpid == 0) { /* Child process */
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/*
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* Get the euid, ruid, egid, rgid, umask value
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* and the current working directory of the
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* child process
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*/
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if (getresuid(&Cruid, &Ceuid, &Csuid) < 0) {
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tst_resm(TFAIL, "getresuid() fails to "
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"get real/eff./saved uid of "
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"child process");
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_exit(1);
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}
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if (getresgid(&Crgid, &Cegid, &Csgid) < 0) {
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tst_resm(TFAIL, "getresgid() fails to "
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"get real/eff./saved gid of "
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"child process");
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_exit(1);
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}
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/*
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* Get the file mode creation mask value of
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* child process by setting value zero and
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* restore the previous mask value.
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*/
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Cumask = umask(0);
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/*
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* Restore the process mask of child to
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* previous value.
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*/
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umask(Cumask);
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/*
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* Get the pathname of current working
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* directory for the child process.
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*/
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if ((Ccwd = (char *)getcwd(NULL,
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BUFSIZ)) == NULL) {
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tst_resm(TFAIL, "getcwd failed for the "
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"child process");
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_exit(1);
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}
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/*
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* Get the device number and the inode
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* number of "/" directory for the child
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* process.
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*/
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if (stat("/", &StatCbuf) < 0) {
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tst_resm(TFAIL, "stat(2) failed to get "
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"info. of'/' in the child "
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"process");
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_exit(1);
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}
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/*
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* Get the device/inode number of "."
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* (working directory) for the child process.
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*/
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if (stat(Ccwd, &Stat_cwd_Cbuf) < 0) {
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tst_resm(TFAIL, "stat(2) failed to get "
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"info. of working irectory in "
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"the child");
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_exit(1);
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}
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/* Now, do the actual comparision */
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if (Peuid != Ceuid || Pegid != Cegid ||
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Psuid != Csuid || Psgid != Csgid ||
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Pruid != Cruid || Prgid != Crgid ||
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Pumask != Cumask) {
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tst_resm(TFAIL, "Attribute values of "
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"parent and child don't match");
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_exit(1);
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} else {
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tst_resm(TINFO, "Attribute values of "
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"parent and child match");
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}
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/* Check for the same working directories */
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if (strcmp(Pcwd, Ccwd) != 0) {
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tst_resm(TFAIL, "Working directories "
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"of parent and child don't "
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"match");
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_exit(1);
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} else {
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tst_resm(TINFO, "Working directories "
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"of parent and child match");
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}
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/*
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* Check for the same device/inode number of
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* '/' directory.
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*/
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if ((StatPbuf.st_ino != StatCbuf.st_ino) ||
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(StatPbuf.st_dev != StatCbuf.st_dev)) {
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tst_resm(TFAIL, "Device/inode number "
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"of parent and childs '/' "
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" don't match");
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_exit(1);
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} else {
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tst_resm(TINFO, "Device/inode number "
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"of parent and childs '/' "
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"match");
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}
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/*
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* Check for the same device and inode number
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* of "." (current working directory.
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*/
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if ((Stat_cwd_Pbuf.st_ino !=
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Stat_cwd_Cbuf.st_ino) ||
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(Stat_cwd_Pbuf.st_dev !=
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Stat_cwd_Cbuf.st_dev)) {
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tst_resm(TFAIL, "Device/inode number "
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"of parent and childs '.' "
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"don't match");
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_exit(1);
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} else {
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tst_resm(TINFO, "Device/inode number "
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"of parent and childs '.' "
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"don't match");
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}
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/*
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* Exit with normal exit code if everything
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* fine
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*/
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_exit(0);
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} else { /* parent process */
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/*
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* Let the parent process wait till child completes
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* its execution.
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*/
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wait(&exit_status);
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/* Check for the exit status of child process */
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if (WEXITSTATUS(exit_status) == 0) {
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tst_resm(TPASS, "Call of vfork() successful");
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} else if (WEXITSTATUS(exit_status) == 1) {
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tst_resm(TFAIL,
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"Child process exited abnormally");
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}
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}
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tst_count++; /* incr. TEST_LOOP counter */
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}
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cleanup();
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tst_exit();
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}
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/*
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* void
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* setup() - performs all ONE TIME setup for this test.
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* This function gets real/effective/saved uid/gid, umask, the device/inode
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* number of '/' and current working directory for the parent process.
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*/
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void setup(void)
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{
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tst_sig(FORK, DEF_HANDLER, cleanup);
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TEST_PAUSE;
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/*
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* Get the euid, ruid, egid, rgid, umask value
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* and the current working directory of the parent process.
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*/
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if (getresuid(&Pruid, &Peuid, &Psuid) < 0) {
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tst_brkm(TFAIL, cleanup, "getresuid() fails to get "
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"real/eff./saved uid of parent");
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}
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if (getresgid(&Prgid, &Pegid, &Psgid) < 0) {
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tst_brkm(TFAIL, cleanup, "getresgid() fails to get "
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"real/eff./saved gid of parent");
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}
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/* Get the process file mode creation mask by setting value 0 */
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Pumask = umask(0);
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umask(Pumask); /*
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* Restore the mask value of the
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* process.
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*/
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/*
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* Get the pathname of current working directory of the parent
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* process.
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*/
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if ((Pcwd = (char *)getcwd(NULL, BUFSIZ)) == NULL) {
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tst_brkm(TFAIL, cleanup,
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"getcwd failed for the parent process");
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}
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/*
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* Get the device and inode number of root directory for the
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* parent process.
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*/
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if (stat("/", &StatPbuf) == -1) {
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tst_brkm(TFAIL, cleanup, "stat(2) failed to get info. of '/' "
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"in parent process");
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}
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/*
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* Get the device number and the inode number of "." (current-
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* working directory) for the parent process.
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*/
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if (stat(Pcwd, &Stat_cwd_Pbuf) < 0) {
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tst_brkm(TFAIL, cleanup, "stat(2) failed to get info. of "
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"working directory in parent process");
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}
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}
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/*
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* void
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* cleanup() - performs all ONE TIME cleanup for this test at
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* completion or premature exit.
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*/
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void cleanup(void)
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{
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}
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