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newlib/winsup/testsuite/winsup.api/ltp/signal03.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. Eagan, Minnesota
*
* TEST IDENTIFIER : signal03 Boundary value and other invalid value checking
* of signal setup and signal sending.
*
* PARENT DOCUMENT : sgntds01 Signal System Call
*
* AUTHOR : Dave Baumgartner
* : Rewrote 12/92 by Richard Logan
*
* CO-PILOT : Barrie Kletscher
*
* DATE STARTED : 10/17/85
*
* TEST ITEMS
*
* 1. SIGKILL can not be set to be caught, errno:EINVAL (POSIX).
* 2. SIGKILL can not be caught.
* 3. SIGKILL can not be set to be ignored, errno:EINVAL (POSIX).
* 4. SIGKILL can not be ignored.
* 5. SIGKILL can not be reset to default, errno:EINVAL (POSIX.
*
* ENVIRONMENTAL NEEDS
*
* NONE
*
* SPECIAL PROCEDURAL REQUIREMENTS
*
* None
*
* INTERCASE DEPENDENCIES
*
* 2 depends on 1 and 4 on 3.
*
* DETAILED DESCRIPTION
*
* main()
* Call catch_test to test setup and catching of SIGKILL.
*
*
* Call ignore_test to test setup and ignoring of SIGKILL.
*
*
* Call sigdfl_test to test setting SIGKILL to default.
*
* * END OF MAIN *
*
*
* catch_test()
*
* fork a child
* if this is the parent
* sleep to let child start.
* send sig to child.
* wait for the child to terminate.
*
* if the termination status of the child equals the signal sent to it
* Test item 1 PASSED the child was killed.
* else if status equals the exit value of SIG_CAUGHT
* Test item 2 FAILED sig was caught.
* else
* Test item 2 FAILED because the child was not killed
* but sig was not caught either.
*
* else this the child
* set exit_val to SIG_NOT_CAUGHT.
* set to catch sig, where the interrupt routine just sets
* exit_val to SIG_CAUGHT.
*
* If the return value and errno, after trying to set to catch sig,
* do not indicate that an error has occurred.
* Test item 1 FAILED bad return, return value:X, errno:X.
* else
* Test item 1 PASSED sig was not set to be caught.
*
* pause until the parent sends a signal.
* The child should be killed by the signal but if not exit
* with exit_val.
*
* * End of catch_test. *
*
*
* ignore_test()
*
* fork a child
* if this is the parent
* sleep to let child start.
* send SIGKILL to child.
* wait for the child to terminate.
*
* if the termination status of the child equals SIGKILL
* Test item 4 PASSED the child was killed.
* else if the status equals the exit value of SIG_IGNORED
* Test item 4 FAILED SIGKILL was ignored.
*
* else this the child
*
* If the return value and errno, after trying to set to ignore SIGKILL,
* do not indicate that an error has occurred.
* Test item 3 FAILED bad return, return value:X, errno:X.
* else
* Test item 3 PASSED SIGKILL was not set to be ignored.
*
* pause until the parent sends SIGKILL.
* The child should be killed by the signal but if not exit
* with SIG_IGNORED.
*
* * End of ignore_test. *
*
*
* sigdfl_test()
*
* If the return value and errno, after trying to set to SIGKILL to default,
* do not indicate that an error has occurred.
* Test item 5 FAILED bad return, return value:X, errno:X.
* else
* Test item 5 PASSED SIGKILL was not set to default.
*
* * End of sigdfl_test. *
*
* BUGS/NOTES
* Since the system call under test is executed in the child, no
* timings on this system call will be reported.
*
***********************************************************************************/
#include <signal.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <sys/wait.h>
#include "test.h"
#include "usctest.h"
void setup();
void cleanup(void) __attribute__((noreturn));
void do_test();
void sigdfl_test();
void update_timings();
#if defined(linux)
# define SIG_PF sig_t /* This might need to be sighandler_t on some systems */
#elif defined(__CYGWIN__)
typedef void (*sighandler_t) (int);
#define SIG_PF sighandler_t
#endif
#define SIG_CAUGHT 1
#define SIG_NOT_CAUGHT 0
#define SIG_IGNORED 5
#define TIMED_OUT 99
#define TIMEOUT 20
#define GO_FLAG 1
#define ERROR_FLAG 2
#define PASS_FLAG 3
#define FAIL_FLAG 4
#define IGNORE_TEST 1
#define CATCH_TEST 2
#define MAXMESG 150 /* The Maximum message that can be created. */
int exit_val; /* Global variable, used to tell whether the */
/* child exited instead of being killed. */
extern int errno; /* errno holds the error value returned by */
/* a system call. */
char mesg[MAXMESG]; /* Holds messages to pass to tst_res. */
struct ipc_t {
int status;
char mesg[MAXMESG];
struct tblock timings;
} Ipc_info;
const char *TCID = "signal03";
int TST_TOTAL = 5;
extern int Tst_count; /* count of test items completed */
int Pid; /* Return value from fork. */
long Tret;
/***********************************************************************
* M A I N
***********************************************************************/
int
main(argc, argv)
int argc;
char **argv;
{
int lc;
const char *msg;
/***************************************************************
* parse standard options
***************************************************************/
if ( (msg=parse_opts(argc, argv, (option_t *) NULL, NULL)) != (char *) NULL ) {
tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
tst_exit();
}
/***************************************************************
* perform global setup for test
***************************************************************/
setup();
/***************************************************************
* 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;
errno=-4;
/*
* Call catch_test to test setup and catching of SIGKILL.
*/
(void) do_test(CATCH_TEST, Tst_count);
/*
* Call ignore_test to test setup and ignoring of SIGKILL.
*/
(void) do_test(IGNORE_TEST, Tst_count);
/*
* Call sigdfl_test to test setting SIGKILL to default.
*/
(void) sigdfl_test();
}
cleanup();
return 0;
} /*End of main*/
/***********************************************************************
*
***********************************************************************/
void
do_test(test_case, tst_count)
int test_case;
int tst_count;
{
int term_stat; /* Termination status of the child returned to */
/* the parent. */
char string[30];
int fd1[2]; /* ipc */
int rd_sz; /* size of read */
void p_timeout_handler();
void c_timeout_handler();
void catchsig();
Tst_count = tst_count;
/*
* Create a pipe of ipc
*/
if ( pipe(fd1) == -1 ) {
sprintf(mesg,
"pipe system call failed, Errno: %d, Error message: %s",
errno,strerror(errno));
tst_resm(TBROK,mesg);
tst_resm(TBROK,mesg);
return;
}
/*
* Cause the read to return 0 once EOF is encountered and the
* read to return -1 if pipe is empty.
*/
if ( fcntl(fd1[0], F_SETFL, O_NONBLOCK) == -1 ) {
sprintf(mesg, "fcntl(fd1[0], F_SETFL, O_NONBLOCK) failed: errno=%d",
errno);
tst_resm(TBROK,mesg);
tst_resm(TBROK,mesg);
close(fd1[0]);
close(fd1[1]);
return;
}
if ((Pid = fork()) > 0) { /* parent */
signal(SIGALRM, p_timeout_handler);
alarm(TIMEOUT);
close(fd1[1]); /* close write side */
/*
* Deal with child's messages.
* Only the GO_FLAG status will allow parent to
* go on. All pipe io will be in the ipc_t structure sizes
* to avoid reading part of next message.
*/
while ( 1 ) {
while ( (rd_sz=read(fd1[0], (char *)&Ipc_info, sizeof(Ipc_info))) != 0 ) {
if ( rd_sz > 0 )
break; /* read something */
}
if ( rd_sz == 0 ) { /* if EOF encountered */
sprintf(mesg, "child's pipe is closed before 'go' message received");
tst_resm(TBROK, Ipc_info.mesg);
tst_resm(TBROK, Ipc_info.mesg);
close(fd1[0]);
return;
}
else if ( Ipc_info.status == GO_FLAG ) {
break; /* go on */
}
else if ( Ipc_info.status == ERROR_FLAG ) {
tst_resm(TBROK, "From child: %s", Ipc_info.mesg);
tst_resm(TBROK, "From child: %s", Ipc_info.mesg);
close(fd1[0]);
return;
}
else if ( Ipc_info.status == PASS_FLAG ) {
if ( STD_FUNCTIONAL_TEST )
tst_resm(TPASS, "From child: %s", Ipc_info.mesg);
else
Tst_count++;
update_timings(Ipc_info.timings);
}
else if ( Ipc_info.status == FAIL_FLAG ) {
tst_resm(TFAIL, "From child: %s", Ipc_info.mesg);
update_timings(Ipc_info.timings);
}
else {
tst_resm(TINFO, "Unknown message from child: %s", mesg);
}
}
/*
* Send the signal SIGKILL to the child.
*/
if (kill(Pid,SIGKILL) == -1)
{
/*
* The kill system call failed.
*/
sprintf(mesg,
"kill(Pid,SIGKILL) failed, Errno: %d, Error message: %s",
errno,strerror(errno));
tst_resm(TBROK,mesg);
tst_resm(TBROK,mesg);
close(fd1[0]);
return;
}
/*
* Wait for the child to terminate and check the termination status.
*/
if (wait(&term_stat) == -1) {
/*
* The wait system call failed.
*/
sprintf(mesg,
"Wait system call failed. Errno: %d, Error message: %s",
errno,strerror(errno));
tst_resm(TBROK,mesg);
tst_resm(TBROK,mesg);
close(fd1[0]);
return;
}
else if ( STD_FUNCTIONAL_TEST ) {
if ((term_stat & 0377) == SIGKILL) {
/*
* The child was killed by the signal sent,
* which is correct.
*/
tst_resm(TPASS,"The child was killed by SIGKILL.");
}
else if ( (term_stat >> 8) == TIMED_OUT ) {
sprintf(mesg, "child exited with a timed out exit status");
tst_resm(TBROK,mesg);
}
else {
if ((term_stat >> 8) == SIG_IGNORED && test_case == IGNORE_TEST ) {
sprintf(mesg,
"SIGKILL was ignored by child after sent by parent.");
}
else if ((term_stat >> 8) == SIG_CAUGHT && test_case == CATCH_TEST ) {
sprintf(mesg,
"SIGKILL was caught by child after sent by parent.");
}
else {
sprintf(mesg,
"Child's termination status is unexpected. Status: %d (%#o).",
term_stat, term_stat);
}
tst_resm(TFAIL, mesg);
}
}
else {
Tst_count++; /* increment test counter */
}
close(fd1[0]);
} /* End of parent. */
else if (Pid == 0) {
/*
* This is the child.
* Set up to ignore/catch SIGKILL and check the return values.
*/
errno=0;
if ( test_case == IGNORE_TEST ) {
exit_val = SIG_IGNORED;
strcpy(string, "signal(SIGKILL, SIG_IGN)");
Tret=(long)signal(SIGKILL, SIG_IGN);
TEST_ERRNO=errno;
}
else {
exit_val = SIG_NOT_CAUGHT;
strcpy(string, "signal(SIGKILL, catchsig)");
Tret=(long)signal(SIGKILL, catchsig);
TEST_ERRNO=errno;
}
Ipc_info.timings=tblock;
if ( (SIG_PF)Tret == SIG_ERR ) {
if ( TEST_ERRNO == EINVAL ) {
sprintf(Ipc_info.mesg, "%s ret:%ld SIG_ERR (%ld) as expected",
string, Tret, (long)SIG_ERR);
Ipc_info.status = PASS_FLAG;
}
else {
sprintf(Ipc_info.mesg,
"%s ret:%ld, errno:%d expected ret:%ld, errno:%d",
string, Tret, TEST_ERRNO, (long)SIG_ERR, EINVAL);
Ipc_info.status = FAIL_FLAG;
}
write(fd1[1], (char *)&Ipc_info, sizeof(Ipc_info));
}
else {
/*
* The child was not allowed to set the signal to
* be ignored and errno was correct.
*/
sprintf(Ipc_info.mesg,
"%s ret:%ld, errno:%d expected ret:%ld, errno:%d",
string, Tret, TEST_ERRNO, (long)SIG_ERR, EINVAL);
Ipc_info.status = FAIL_FLAG;
write(fd1[1], (char *)&Ipc_info, sizeof(Ipc_info));
}
/*
* tell parent we are ready - setup by child is done
*/
Ipc_info.status = GO_FLAG;
write(fd1[1], (char *)&Ipc_info, sizeof(Ipc_info));
/*
* Set the alarm to wake up from the pause below if
* the parents signal is ignored.
*/
signal(SIGALRM, p_timeout_handler);
alarm(TIMEOUT);
/*
* Pause until the parent sends a signal or until alarm is received.
*/
pause();
exit(exit_val);
} /* End of child. */
else {
/*
* The fork system call failed.
*/
sprintf(mesg,
"Fork system call failed. Errno: %d, Error message: %s",
errno,strerror(errno));
tst_resm(TBROK,mesg);
tst_resm(TBROK,mesg);
close(fd1[0]);
close(fd1[1]);
return;
}
} /* End of do_test. */
/***********************************************************************
* sigdfl_test - test for attempt to set SIGKILL to default
***********************************************************************/
void
sigdfl_test()
{
/*
* Try to set SIGKILL to default and check the return values.
*/
errno=-4;
Tret=(long)signal(SIGKILL,SIG_DFL);
TEST_RETURN=Tret;
TEST_ERRNO=errno;
if ( (SIG_PF)TEST_RETURN == SIG_ERR ) {
if ( STD_FUNCTIONAL_TEST ) {
if ( TEST_ERRNO != EINVAL ) {
sprintf(mesg,
"signal(SIGKILL,SIG_DFL) ret:%d, errno:%d expected ret:-1, errno:%d",
TEST_RETURN, TEST_ERRNO, EINVAL);
tst_resm(TFAIL, mesg);
}
else {
sprintf(mesg,
"signal(SIGKILL,SIG_DFL) ret:%d, errno:%d as expected.",
TEST_RETURN, TEST_ERRNO);
tst_resm(TPASS, mesg);
}
}
else
Tst_count++;
}
else {
sprintf(mesg,
"signal(SIGKILL,SIG_DFL) ret:%d, errno:%d expected ret:-1, errno:%d",
TEST_RETURN, TEST_ERRNO, EINVAL);
tst_resm(TFAIL, mesg);
}
} /* End of sigdfl_test. */
/***************************************************************
* setup() - performs all ONE TIME setup for this test.
***************************************************************/
void
setup()
{
/* capture signals */
tst_sig(FORK, DEF_HANDLER, cleanup);
/* make and change to a temporary directory */
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;
/*
* remove the temporary directory and exit with
* return code appropriate for results
*/
tst_rmdir();
tst_exit();
} /* End cleanup() */
/***********************************************************************
* Signal handler routine that used by the parent to handler
* a time out situation. It will attempt to kill the child and
* call cleanup.
***********************************************************************/
void
p_timeout_handler()
{
kill(Pid, SIGKILL);
cleanup();
}
/***********************************************************************
* Signal handler routine that used by the child to handle
* a time out situation. It will set a global varaible and return
* if called.
***********************************************************************/
void
c_timeout_handler()
{
exit_val = TIMED_OUT;
return;
}
/***********************************************************************
* This signal handling routine will set a global variable and return
* if called.
***********************************************************************/
void
catchsig()
{
exit_val = SIG_CAUGHT;
return;
}
/***********************************************************************
* Update timing information
***********************************************************************/
void
update_timings(atblock)
struct tblock atblock;
{
tblock.tb_max += atblock.tb_max;
tblock.tb_min += atblock.tb_min;
tblock.tb_total += atblock.tb_total;
tblock.tb_count += atblock.tb_count;
}
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