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newlib/winsup/testsuite/winsup.api/ltp/fork01.c

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/*
* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/NoticeExplan/
*
*/
/* $Id$ */
/**********************************************************
*
* OS Test - Silicon Graphics, Inc.
*
* TEST IDENTIFIER : fork01
*
* EXECUTED BY : anyone
*
* TEST TITLE : Basic test for fork(2)
*
* PARENT DOCUMENT : frktds02
*
* TEST CASE TOTAL : 2
*
* WALL CLOCK TIME : 1
*
* CPU TYPES : ALL
*
* AUTHOR : Kathy Olmsted
*
* CO-PILOT : Steve Shaw
*
* DATE STARTED : 06/17/92
*
* INITIAL RELEASE : UNICOS 7.0
*
* TEST CASES
*
* 1.) fork returns without error
* 2.) fork returns the pid of the child
*
* INPUT SPECIFICATIONS
* The standard options for system call tests are accepted.
* (See the parse_opts(3) man page).
*
* OUTPUT SPECIFICATIONS
*
* DURATION
* Terminates - with frequency and infinite modes.
*
* SIGNALS
* Uses SIGUSR1 to pause before test if option set.
* (See the parse_opts(3) man page).
*
* RESOURCES
* None
*
* ENVIRONMENTAL NEEDS
* No run-time environmental needs.
*
* SPECIAL PROCEDURAL REQUIREMENTS
* None
*
* INTERCASE DEPENDENCIES
* None
*
* DETAILED DESCRIPTION
*
* Setup:
* Setup signal handling.
* Pause for SIGUSR1 if option specified.
*
* Test:
* Loop if the proper options are given.
* fork()
* Check return code, if system call failed (return=-1)
* Log the errno and Issue a FAIL message.
* Otherwise, Issue a PASS message.
* CHILD:
* determine PID
* write to PID to a file and close the file
* exit
* PARENT:
* wait for child to exit
* read child PID from file
* compare child PID to fork() return code and report
* results
*
* Cleanup:
* Print errno log and/or timing stats if options given
*
*
*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#**/
#include <errno.h>
#include <string.h>
#include <signal.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "test.h"
#include "usctest.h"
#define KIDEXIT 42
extern void setup();
extern void cleanup();
#define LINE_SZ 20 /* size of the line written/read to the file */
#define FILENAME "childpid"
const char *TCID="fork01"; /* Test program identifier. */
int TST_TOTAL=2; /* Total number of test cases. */
extern int Tst_count; /* Test Case counter for tst_* routines */
/***************************************************************
* child_pid - the child side of the test
* determine the PID and write to a file
***************************************************************/
void child_pid()
{
int fildes;
char tmp_line[LINE_SZ];
fildes = creat(FILENAME,0700);
sprintf(tmp_line,"%d\n",getpid());
write(fildes,tmp_line,LINE_SZ);
close(fildes);
}
/***************************************************************
* parent_pid - the parent side of the test
* read the value determined by the child
* compare and report results
***************************************************************/
void parent_pid()
{
int fildes;
char tmp_line[LINE_SZ];
pid_t child_id;
if ((fildes = open(FILENAME,O_RDWR)) == -1) {
tst_brkm(TBROK, cleanup,
"parent open failed. errno: %d (%s)\n",
errno, strerror(errno));
}
else {
if (read(fildes,tmp_line,LINE_SZ) == 0) {
tst_brkm(TBROK,cleanup, "fork(): parent failed to read PID from file errno: %d (%s)",
errno, strerror(errno));
}
else {
child_id = atoi(tmp_line);
if (TEST_RETURN != child_id) {
tst_resm(TFAIL,"child reported a pid of %d. parent received %d from fork()",
child_id,TEST_RETURN);
} else {
tst_resm(TPASS,"child pid and fork() return agree: %d",child_id);
}
}
close(fildes);
}
}
/***************************************************************
* main() - performs tests
*
***************************************************************/
int
main(int ac, char **av)
{
int lc; /* loop counter */
const char *msg; /* message returned from parse_opts */
int fails;
int kid_status, wait_status;
/***************************************************************
* parse standard options
***************************************************************/
if ( (msg=parse_opts(ac, av, (option_t *) NULL, NULL)) != (char *) NULL )
tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
/***************************************************************
* perform global setup for test
***************************************************************/
setup();
/* set the expected errnos... */
/***************************************************************
* check looping state if -c option given
***************************************************************/
for (lc=0; TEST_LOOPING(lc); lc++) {
/* reset Tst_count in case we are looping. */
Tst_count=0;
fails = 0;
/*
* Call fork(2)
*/
TEST(fork());
/* check return code */
if ( TEST_RETURN == -1 ) {
TEST_ERROR_LOG(TEST_ERRNO);
if ( STD_FUNCTIONAL_TEST ) {
tst_resm(TFAIL, "fork() Failed, errno=%d : %s",
TEST_ERRNO, strerror(TEST_ERRNO));
tst_resm(TBROK,"unable to continue");
}
}
if (TEST_RETURN == 0) {
/* child */
if ( STD_FUNCTIONAL_TEST ) {
child_pid();
}
exit(KIDEXIT);
} else {
/* parent */
if ( STD_FUNCTIONAL_TEST ) {
tst_resm(TPASS, "fork() returned %d", TEST_RETURN);
}
/* wait for the child to complete */
wait_status = wait(&kid_status);
if ( STD_FUNCTIONAL_TEST ) {
if (wait_status == TEST_RETURN) {
if (kid_status != KIDEXIT << 8) {
tst_resm(TBROK,
"incorrect child status returned on wait(): %d",
kid_status);
fails++;
}
}
else {
tst_resm(TBROK,
"wait() for child status failed with %d errno: %d : %s",
wait_status,errno,strerror(errno));
fails++;
}
if (fails == 0 ) {
/* verification tests */
parent_pid();
}
} /* STD_FUNCTIONAL_TEST */
} /* TEST_RETURN */
} /* End for TEST_LOOPING */
/***************************************************************
* cleanup and exit
***************************************************************/
cleanup();
return 0;
} /* End main */
/***************************************************************
* setup() - performs all ONE TIME setup for this test.
***************************************************************/
void
setup()
{
/* capture signals */
tst_sig(FORK, DEF_HANDLER, cleanup);
tst_tmpdir();
/* Pause if that option was specified */
TEST_PAUSE;
} /* End setup() */
/***************************************************************
* cleanup() - performs all ONE TIME cleanup for this test at
* completion or premature exit.
***************************************************************/
void
cleanup()
{
/*
* print timing stats if that option was specified.
* print errno log if that option was specified.
*/
TEST_CLEANUP;
/* exit with return code appropriate for results */
tst_rmdir();
tst_exit();
} /* End cleanup() */
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