Importing Egor's testsuite.
This commit is contained in:
Christopher Faylor
405
winsup/testsuite/winsup.api/ltp/fork04.c
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405
winsup/testsuite/winsup.api/ltp/fork04.c
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/*
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* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/NoticeExplan/
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*
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*/
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/* $Id$ */
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/**********************************************************
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*
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* OS Test - Silicon Graphics, Inc.
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*
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* TEST IDENTIFIER : fork04
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*
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* TEST TITLE : Child inheritance of Environment Variables after fork()
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*
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* PARENT DOCUMENT : frktds01
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*
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* TEST CASE TOTAL : 3
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*
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* WALL CLOCK TIME : 1
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*
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* CPU TYPES : ALL
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*
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* AUTHOR : Kathy Olmsted
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*
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* CO-PILOT : Steve Shaw
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*
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* DATE STARTED : 06/17/92
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*
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* INITIAL RELEASE : UNICOS 7.0
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*
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* TEST CASES
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* Test these environment variables correctly inherited by child:
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* 1. TERM
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* 2. NoTSetzWq
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* 3. TESTPROG
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*
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* INPUT SPECIFICATIONS
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* The standard options for system call tests are accepted.
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* (See the parse_opts(3) man page).
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*
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* DURATION
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* Terminates - with frequency and infinite modes.
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*
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* SIGNALS
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* Uses SIGUSR1 to pause before test if option set.
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* (See the parse_opts(3) man page).
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*
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* ENVIRONMENTAL NEEDS
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* No run-time environmental needs.
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*
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* DETAILED DESCRIPTION
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*
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* Setup:
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* Setup signal handling.
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* Make and change to a temporary directory.
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* Pause for SIGUSR1 if option specified.
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* Add TESTPROG variable to the environment
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*
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* Test:
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* Loop if the proper options are given.
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* fork()
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* Check return code, if system call failed (return=-1)
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* Log the errno
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* CHILD:
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* open a temp file
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* Determine environment values and write to file
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* close file containing test values.
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* exit.
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* PARENT:
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* Wait for child to exit.
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* Verify exit status
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* Open file containing test values.
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* For each test case:
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* Read the value from the file.
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* Determine and report PASS/FAIL result.
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*
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* Cleanup:
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* Print errno log and/or timing stats if options given
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* Remove the temporary directory and exit.
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*
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*
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*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#**/
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/wait.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 <sys/param.h>
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#include <signal.h> /*Includes signal information. */
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#include <errno.h>
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#include "test.h"
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#include "usctest.h"
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char *TCID="fork04"; /* Test program identifier. */
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extern int Tst_count; /* Test Case counter for tst_* routines */
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#define KIDEXIT 42 /* Known value for child exit status */
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#define MAX_LINE_LENGTH 256
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#define OUTPUT_FILE "env.out"
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#define ENV_NOT_SET "getenv() does not find variable set"
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/* list of environment variables to test */
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char *environ_list[] = {"TERM","NoTSetzWq","TESTPROG"};
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#define NUMBER_OF_ENVIRON sizeof(environ_list)/sizeof(char *)
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int TST_TOTAL=NUMBER_OF_ENVIRON; /* Total number of test cases. */
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/***************************************************************
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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
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cleanup()
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{
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/*
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* print timing stats if that option was specified.
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* print errno log if that option was specified.
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*/
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TEST_CLEANUP;
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/* remove the temporary directory and exit with
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return code appropriate for results */
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tst_rmdir();
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tst_exit();
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} /* End cleanup() */
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/***************************************************************
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* setup() - performs all ONE TIME setup for this test.
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***************************************************************/
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void
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setup()
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{
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/* capture signals */
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tst_sig(FORK, DEF_HANDLER, cleanup);
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/* make and change to a temporary directory */
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tst_tmpdir();
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/* add a variable to the environment */
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putenv("TESTPROG=FRKTCS04");
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/* Pause if that option was specified */
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TEST_PAUSE;
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} /* End setup() */
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/***************************************************************
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* child_environment - the child side of the environment tests
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* determine values for the variables and write to a file
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***************************************************************/
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void child_environment()
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{
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int fildes;
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int index;
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char msg[MAX_LINE_LENGTH];
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char *var;
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fildes = creat(OUTPUT_FILE,0700);
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for (index=0;index<NUMBER_OF_ENVIRON;index++) {
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memset(msg, 0, MAX_LINE_LENGTH);
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if ( (var=getenv(environ_list[index])) == NULL )
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(void)sprintf(msg,"%s:%s",environ_list[index], ENV_NOT_SET);
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else
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(void)sprintf(msg,"%s:%s",environ_list[index], var);
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write(fildes,msg,sizeof(msg)); /* includes extra null chars */
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}
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close(fildes);
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}
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/***********************************************************************
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*
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* Compare parent env string to child's string.
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* Each string is in the format: <env var>:<value>
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*
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***********************************************************************/
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int
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cmp_env_strings(char *pstring, char *cstring)
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{
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char *penv, *cenv, *pvalue, *cvalue;
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/*
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* Break pstring into env and value
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*/
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penv=pstring;
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if ( (pvalue=strchr(pstring, ':')) == NULL ) {
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tst_resm(TBROK,
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"internal error - parent's env string not in correct format:'%s'",
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pstring);
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return -1;
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} else {
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*pvalue='\0';
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pvalue++;
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if ( *pvalue == '\0' ) {
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tst_resm(TBROK, "internal error - missing parent's env value");
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return -1;
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}
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}
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/*
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* Break cstring into env and value
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*/
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cenv=cstring;
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if ( (cvalue=strchr(cstring, ':')) == NULL ) {
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tst_resm(TBROK,
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"internal error - parent's env string not in correct format:'%s'",
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cstring);
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return -1;
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} else {
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*cvalue='\0';
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cvalue++;
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if ( *cvalue == '\0' ) {
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tst_resm(TBROK, "internal error - missing child's env value");
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return -1;
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}
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}
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if ( strcmp(penv, cenv) != 0 ) {
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tst_resm(TBROK, "internal error - parent(%s) != child (%s) env",
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penv, cenv);
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return -1;
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}
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if ( strcmp(pvalue, cvalue) != 0 ) {
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tst_resm(TFAIL, "Env var %s changed after fork(), parent's %s, child's %s",
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penv, pvalue, cvalue);
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} else {
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tst_resm(TPASS, "Env var %s unchanged after fork(): %s",
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penv, cvalue);
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}
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return 0;
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}
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/***************************************************************
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* parent_environment - the parent side of the environment tests
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* determine values for the variables
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* read the values determined by the child
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* compare values
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***************************************************************/
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void parent_environment()
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{
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int fildes;
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char tmp_line[MAX_LINE_LENGTH];
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char parent_value[MAX_LINE_LENGTH];
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int index;
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int ret;
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char *var;
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if ((fildes = open(OUTPUT_FILE,O_RDWR)) == -1) {
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tst_brkm(TBROK, cleanup,
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"fork() test. Parent open of temporary file failed. errno %d (%s)\n",
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errno, strerror(errno));
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}
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for (index=0;index<NUMBER_OF_ENVIRON;index++)
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{
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if ((ret=read(fildes,tmp_line,MAX_LINE_LENGTH)) == 0) {
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tst_resm(TBROK,"fork() test. parent_environment: failed to read from file with %d (%s)",
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errno,strerror(errno));
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}
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else {
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if ( (var=getenv(environ_list[index])) == NULL )
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sprintf(parent_value,"%s:%s", environ_list[index], ENV_NOT_SET);
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else
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sprintf(parent_value,"%s:%s", environ_list[index], var);
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cmp_env_strings(parent_value, tmp_line);
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}
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}
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close(fildes);
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}
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/***************************************************************
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* main() - performs tests
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*
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***************************************************************/
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int
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main(int ac, char **av)
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{
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int lc; /* loop counter */
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char *msg; /* message returned from parse_opts */
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int kid_status; /* status returned from child */
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int wait_status; /* status of wait system call in parent */
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int fails; /* indicates whether to continue with tests */
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/***************************************************************
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* parse standard options
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***************************************************************/
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if ( (msg=parse_opts(ac, av, (option_t *) NULL, NULL)) != (char *) NULL ) {
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tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
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tst_exit();
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}
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/***************************************************************
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* perform global setup for test
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***************************************************************/
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setup();
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/***************************************************************
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* check looping state if -c option given
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***************************************************************/
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for (lc=0; TEST_LOOPING(lc); lc++) {
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/* reset Tst_count and fail indicator in case we are looping. */
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Tst_count=0;
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fails = 0;
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/* make the call to fork */
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TEST(fork());
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/* check return code */
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if ( TEST_RETURN == -1 ) {
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/* fork failed */
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if ( STD_FUNCTIONAL_TEST ) {
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tst_brkm(TFAIL, cleanup, "fork() failed with %d (%s)",
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TEST_ERRNO, strerror(TEST_ERRNO));
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}
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}
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else if (TEST_RETURN == 0) {
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/* child */
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if ( STD_FUNCTIONAL_TEST ) {
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/* determine environment variables */
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child_environment();
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}
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/* exit with known value */
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exit(KIDEXIT);
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} else {
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/* parent of successful fork */
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/* wait for the child to complete */
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wait_status = wait(&kid_status);
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if ( STD_FUNCTIONAL_TEST ) {
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/* validate the child exit status */
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if (wait_status == TEST_RETURN) {
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if (kid_status != KIDEXIT << 8) {
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tst_brkm(TBROK, cleanup,
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"fork(): Incorrect child status returned on wait(): %d",
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kid_status);
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fails++;
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}
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}
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else {
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tst_brkm(TBROK, cleanup,
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"fork(): wait() for child status failed with %d errno: %d : %s",
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wait_status,errno,strerror(errno));
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fails++;
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}
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if (fails == 0 ) {
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/* verification tests */
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parent_environment();
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}
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}
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}
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} /* End for TEST_LOOPING */
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/***************************************************************
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* cleanup and exit
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***************************************************************/
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cleanup();
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return 0;
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} /* End main */
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