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minix3/tests/ipc/semctl/semctl06.c

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/*
*
* Copyright (c) International Business Machines Corp., 2002
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* 06/30/2001 Port to Linux nsharoff@us.ibm.com */
/* 10/30/2002 Port to LTP dbarrera@us.ibm.com */
/*
* NAME
* semctl06
*
* CALLS
* semctl(2) semget(2) semop(2)
*
* ALGORITHM
* Get and manipulate a set of semaphores.
*
* RESTRICTIONS
*
* WARNING
* If this test fail, it may be necessary to use the ipcs and ipcrm
* commands to remove any semaphores left in the system due to a
* premature exit of this test.
*/
#define DEBUG 0
#ifdef UCLINUX
#define _GNU_SOURCE /* for asprintf */
#include <stdio.h>
#endif
#include <sys/types.h> /* needed for test */
#include <sys/ipc.h> /* needed for test */
#include <sys/sem.h> /* needed for test */
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <signal.h>
#include "test.h"
#include "usctest.h"
#include <sys/wait.h>
#include "ipcsem.h"
int local_flag=1;
#define NREPS 10
#define NPROCS 3
#define NKIDS 5
#define NSEMS 5
#define HVAL 1000
#define LVAL 100
#define FAILED 0
void setup (void);
void cleanup(void);
static key_t keyarray[NPROCS];
static struct sembuf semops[NSEMS];
static short maxsemvals[NSEMS];
static int pidarray[NPROCS];
static int kidarray[NKIDS];
static int tid;
static int procstat;
static char *prog;
static unsigned short semvals[NSEMS];
/*
* * These globals must be defined in the test.
* * */
char *TCID="semctl06"; /* Test program identifier. */
int TST_TOTAL=1; /* Total number of test cases. */
extern int Tst_count; /* Test Case counter for tst_* routines */
int exp_enos[]={0}; /* List must end with 0 */
static void term(int sig);
static void dosemas(int id);
static void dotest(key_t key);
#ifdef UCLINUX
static char *argv0;
void do_child();
static int id_uclinux;
static char *maxsemstring;
#endif
/*--------------------------------------------------------------*/
/*ARGSUSED*/
int
main(int argc, char **argv)
{
register int i, j, ok, pid;
int count, child, status, nwait;
#ifdef UCLINUX
char *msg;
if ((msg = parse_opts(argc, argv, (option_t *)NULL, NULL)) != (char *)NULL){
tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
}
argv0 = argv[0];
maybe_run_child(&do_child, "dS", &id_uclinux, &maxsemstring);
#endif
prog = argv[0];
nwait = 0;
setup();
/*--------------------------------------------------------------*/
srand(getpid());
tid = -1;
for (i = 0; i < NPROCS; i++) {
do {
keyarray[i] = (key_t)rand();
if (keyarray[i] == IPC_PRIVATE) {
ok = 0;
continue;
}
ok = 1;
for (j = 0; j < i; j++) {
if (keyarray[j] == keyarray[i]) {
ok = 0;
break;
}
}
} while (ok == 0);
}
if ((signal(SIGTERM, term)) == SIG_ERR) {
tst_resm(TFAIL, "\tsignal failed. errno = %d", errno);
tst_exit();
}
for (i = 0; i < NPROCS; i++) {
if ((pid = FORK_OR_VFORK()) < 0) {
tst_resm(TFAIL, "\tFork failed (may be OK if under stress)");
tst_exit();
}
if (pid == 0) {
procstat = 1;
dotest(keyarray[i]);
exit(0);
}
pidarray[i] = pid;
nwait++;
}
/*
* Wait for children to finish.
*/
count = 0;
while((child = wait(&status)) > 0) {
if (status) {
tst_resm(TFAIL, "%s[%d] Test failed. exit=0x%x", prog, child, status);
local_flag = FAILED;
}
++count;
}
/*
* Should have collected all children.
*/
if (count != nwait) {
tst_resm(TFAIL, "\tWrong # children waited on, count = %d", count);
local_flag = FAILED;
}
if (local_flag != FAILED)
tst_resm(TPASS, "semctl06 ran successfully!");
else tst_resm(TFAIL, "semctl06 failed");
/*--------------------------------------------------------------*/
/* Clean up any files created by test before call to anyfail. */
cleanup ();
return (0); /* shut lint up */
}
/*--------------------------------------------------------------*/
static void
dotest(key_t key)
{
int id, pid, status;
int count, child, nwait;
short i;
union semun get_arr;
nwait = 0;
srand(getpid());
if ((id = semget(key, NSEMS, IPC_CREAT)) < 0) {
tst_resm(TFAIL, "\tsemget() failed errno %d", errno);
exit(1);
}
tid = id;
for (i = 0; i < NSEMS; i++) {
do {
maxsemvals[i] = /*CASTOK*/(short)(rand() % HVAL);
} while (maxsemvals[i] < LVAL);
semops[i].sem_num = i;
semops[i].sem_op = maxsemvals[i];
semops[i].sem_flg = SEM_UNDO;
}
if (semop(id, semops, NSEMS) < 0) {
tst_resm(TFAIL, "\tfirst semop() failed errno %d", errno);
exit(1);
}
for (i = 0; i < NKIDS; i++) {
if ((pid = FORK_OR_VFORK()) < 0) {
tst_resm(TFAIL, "\tfork failed");
}
if (pid == 0) {
#ifdef UCLINUX
int j;
maxsemstring = "";
for (j = 0; j < NSEMS; j++) {
if (asprintf(&maxsemstring, "%s%s%d",
maxsemstring, (j ? ":" : ""),
maxsemvals[j]) < 0) {
tst_resm(TBROK, "Could not serialize "
"maxsemvals");
tst_exit();
}
}
if (self_exec(argv0, "dS", id, maxsemstring) < 0) {
tst_resm(TFAIL, "\tself_exec failed");
}
#else
dosemas(id);
#endif
}
if (pid > 0) {
kidarray[i] = pid;
nwait++;
}
}
procstat = 2;
/*
* Wait for children to finish.
*/
count = 0;
while((child = wait(&status)) > 0) {
if (status) {
tst_resm(TFAIL, "\t%s:dotest[%d] exited status = 0x%x", prog, child, status);
local_flag = FAILED;
}
++count;
}
/*
* Should have collected all children.
*/
if (count != nwait) {
tst_resm(TFAIL, "\tWrong # children waited on, count = %d", count);
local_flag = FAILED;
}
get_arr.array = semvals;
if (semctl(id, 0, GETALL, get_arr) < 0) {
tst_resm(TFAIL, "\terror on GETALL");
tst_resm(TFAIL, "\tsemctl() failed errno %d", errno);
}
if (DEBUG)
tst_resm(TINFO, "\tchecking maxvals");
for (i = 0; i < NSEMS; i++) {
if (semvals[i] != maxsemvals[i]) {
tst_resm(TFAIL, "\terror on i %d orig %d final %d", i, semvals[i],
maxsemvals[i]);
local_flag = FAILED;
}
}
if (DEBUG)
tst_resm(TINFO, "\tmaxvals checked");
/* 4th arg must either be missing, or must be of type 'union semun'.
* CANNOT just be an int, else it crashes on ppc.
*/
get_arr.val = 0;
if (semctl(id, 0, IPC_RMID, get_arr) < 0) {
tst_resm(TFAIL, "\tsemctl(IPC_RMID) failed errno %d", errno);
local_flag = FAILED;
}
if (local_flag == FAILED)
exit(1);
}
#ifdef UCLINUX
void
do_child()
{
int i;
char *tok;
char *endptr;
tok = strtok(maxsemstring, ":");
for (i = 0; i < NSEMS; i++) {
if (strlen(tok) == 0) {
tst_resm(TBROK, "Invalid argument to -C option");
tst_exit();
}
maxsemvals[i] = strtol(tok, &endptr, 10);
if (*endptr != '\0') {
tst_resm(TBROK, "Invalid argument to -C option");
tst_exit();
}
tok = strtok(NULL, ":");
}
dosemas(id_uclinux);
}
#endif
static void
dosemas(int id)
{
int i, j;
srand(getpid());
for (i = 0; i < NREPS; i++) {
for (j = 0; j < NSEMS; j++) {
semops[j].sem_num = j;
semops[j].sem_flg = SEM_UNDO;
do {
semops[j].sem_op =
( - /*CASTOK*/(short)(rand() % (maxsemvals[j]/2)));
} while (semops[j].sem_op == 0);
}
if (semop(id, semops, NSEMS) < 0) {
tst_resm(TFAIL, "\tsemop1 failed errno %d", errno);
exit(1);
}
for (j = 0; j < NSEMS; j++) {
semops[j].sem_op = ( - semops[j].sem_op);
}
if (semop(id, semops, NSEMS) < 0) {
tst_resm(TFAIL, "\tsemop2 failed errno %d", errno);
exit(1);
}
}
exit(0);
}
/*ARGSUSED*/
static void
term(int sig)
{
int i;
if ((signal(SIGTERM, term)) == SIG_ERR) {
tst_resm(TFAIL, "\tsignal failed. errno %d", errno);
exit(1);
}
if (procstat == 0) {
if (DEBUG)
tst_resm(TINFO, "\ttest killing kids");
for (i = 0; i < NPROCS; i++) {
if (kill(pidarray[i], SIGTERM) != 0) {
tst_resm(TFAIL, "Kill error pid = %d :",pidarray[1]);
}
}
if (DEBUG)
tst_resm(TINFO, "\ttest kids killed");
return;
}
if (procstat == 1) {
/* 4th arg must either be missing, or must be of type 'union semun'.
* CANNOT just be an int, else it crashes on ppc.
*/
union semun arg;
arg.val = 0;
(void)semctl(tid, 0, IPC_RMID, arg);
exit(1);
}
if (tid == -1) {
exit(1);
}
for (i = 0; i < NKIDS; i++) {
if (kill(kidarray[i], SIGTERM) != 0) {
tst_resm(TFAIL, "Kill error kid id = %d :",kidarray[1]);
}
}
}
/***************************************************************
* setup() - performs all ONE TIME setup for this test.
*****************************************************************/
void
setup()
{
/* You will want to enable some signal handling so you can capture
* unexpected signals like SIGSEGV.
* */
tst_sig(FORK, DEF_HANDLER, cleanup);
/* Pause if that option was specified */
/* One cavet that hasn't been fixed yet. TEST_PAUSE contains the code to
* fork the test with the -c option. You want to make sure you do this
* before you create your temporary directory.
*/
TEST_PAUSE;
}
/***************************************************************
* 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_exit();
}
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