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📄 glue.h(731 B)
📄 heap.c(17.29 KB)
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📄 index.html(5.95 KB)
📄 inet6_ntop.c(1.1 KB)
📄 io.html(26.6 KB)
📄 ldap.c(35.72 KB)
📄 local.h(9.42 KB)
📄 makebuf.c(3.36 KB)
📄 match.c(2.77 KB)
📄 mbdb.c(16.61 KB)
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📄 rewind.c(1.08 KB)
📄 rpool.c(11.54 KB)
📄 rpool.html(6.08 KB)
📄 sem.c(4.41 KB)
📄 setvbuf.c(4.2 KB)
📄 shm.c(2.62 KB)
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📄 smstdio.c(6.14 KB)
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📄 stdio.c(9.7 KB)
📄 strcasecmp.c(3.14 KB)
📄 strdup.c(2.79 KB)
📄 strerror.c(1.27 KB)
📄 strexit.c(2.76 KB)
📄 string.c(1.29 KB)
📄 stringf.c(1.77 KB)
📄 strio.c(9.18 KB)
📄 strl.c(7.52 KB)
📄 strrevcmp.c(1.61 KB)
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📄 t-cf.c(934 B)
📄 t-event.c(1.79 KB)
📄 t-exc.c(2.75 KB)
📄 t-fget.c(1.71 KB)
📄 t-float.c(1.78 KB)
📄 t-fopen.c(875 B)
📄 t-heap.c(1.3 KB)
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📄 t-match.c(1.1 KB)
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📄 t-notify.c(1.81 KB)
📄 t-path.c(742 B)
📄 t-qic.c(5.43 KB)
📄 t-rpool.c(1.5 KB)
📄 t-scanf.c(1.38 KB)
📄 t-sem.c(5.85 KB)
📄 t-shm.c(4.42 KB)
📄 t-smstdio.c(1.55 KB)
📄 t-string.c(968 B)
📄 t-strio.c(775 B)
📄 t-strl.c(3.53 KB)
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📄 wbuf.c(2.51 KB)
📄 wsetup.c(1.88 KB)
📄 xtrap.c(653 B)

Editing: t-sem.c

/*
 * Copyright (c) 2000-2001, 2005-2008 Proofpoint, Inc. and its suppliers.
 *      All rights reserved.
 *
 * By using this file, you agree to the terms and conditions set
 * forth in the LICENSE file which can be found at the top level of
 * the sendmail distribution.
 */

#include <sm/gen.h>
SM_RCSID("@(#)$Id: t-sem.c,v 1.18 2013-11-22 20:51:43 ca Exp $")

#include <stdio.h>

#if SM_CONF_SEM
# include <stdlib.h>
# include <unistd.h>
# include <sysexits.h>
# include <sm/heap.h>
# include <sm/string.h>
# include <sm/signal.h>
# include <sm/test.h>
# include <sm/sem.h>

# define T_SM_SEM_KEY (4321L)

static void
delay(t, s)
	int t;
	char *s;
{
	if (t > 0)
	{
#if DEBUG
		fprintf(stderr, "sleep(%d) before %s\n", t, s);
#endif
		sleep(t);
	}
#if DEBUG
	fprintf(stderr, "%s\n", s);
#endif
}

/*
**  SEMINTER -- interactive testing of semaphores.
**
**	Parameters:
**		owner -- create semaphores.
**
**	Returns:
**		0 on success
**		< 0 on failure.
*/

static int
seminter(owner)
	bool owner;
{
	int semid;
	int t;

semid = sm_sem_start(T_SM_SEM_KEY, SM_NSEM, 0, owner);
	if (semid < 0)
	{
		perror("sm_sem_start failed");
		return 1;
	}

while ((t = getchar()) != EOF)
	{
		switch (t)
		{
		  case 'a':
			delay(0, "try to acq");
			if (sm_sem_acq(semid, 0, 2) < 0)
			{
				perror("sm_sem_acq failed");
				return 1;
			}
			delay(0, "acquired");
			break;

case 'r':
			delay(0, "try to rel");
			if (sm_sem_rel(semid, 0, 2) < 0)
			{
				perror("sm_sem_rel failed");
				return 1;
			}
			delay(0, "released");
			break;

case 'v':
			if ((t = sm_sem_get(semid, 0)) < 0)
			{
				perror("get_sem failed");
				return 1;
			}
			printf("semval: %d\n", t);
			break;

}
	}
	if (owner)
		return sm_sem_stop(semid);
	return 0;
}

/*
**  SEM_CLEANUP -- cleanup if something breaks
**
**	Parameters:
**		sig -- signal.
**
**	Returns:
**		none.
*/

static int semid_c = -1;
void
sem_cleanup(sig)
	int sig;
{
	if (semid_c >= 0)
		(void) sm_sem_stop(semid_c);
	exit(EX_UNAVAILABLE);
}

static int
drop_priv(uid, gid)
	uid_t uid;
	gid_t gid;
{
	int r;

r = setgid(gid);
	if (r != 0)
		return r;
	r = setuid(uid);
	return r;
}

/*
**  SEMTEST -- test of semaphores
**
**	Parameters:
**		owner -- create semaphores.
**
**	Returns:
**		0 on success
**		< 0 on failure.
*/

# define MAX_CNT	10

static int
semtest(owner, uid, gid)
	int owner;
	uid_t uid;
	gid_t gid;
{
	int semid, r;
	int cnt = 0;

if (!owner && uid != 0)
	{
		r = drop_priv(uid, gid);
		if (r < 0)
		{
			perror("drop_priv child failed");
			return -1;
		}
	}
	semid = sm_sem_start(T_SM_SEM_KEY, 1, 0, owner);
	if (semid < 0)
	{
		perror("sm_sem_start failed");
		return -1;
	}

if (owner)
	{
		if (uid != 0)
		{
			r = sm_semsetowner(semid, uid, gid, 0660);
			if (r < 0)
			{
				perror("sm_semsetowner failed");
				return -1;
			}
			r = drop_priv(uid, gid);
			if (r < 0)
			{
				perror("drop_priv owner failed");
				return -1;
			}
		}

/* just in case someone kills the program... */
		semid_c = semid;
		(void) sm_signal(SIGHUP, sem_cleanup);
		(void) sm_signal(SIGINT, sem_cleanup);
		(void) sm_signal(SIGTERM, sem_cleanup);

delay(1, "parent: acquire 1");
		cnt = 0;
		do
		{
			r = sm_sem_acq(semid, 0, 0);
			if (r < 0)
			{
				sleep(1);
				++cnt;
			}
		} while (r < 0 && cnt <= MAX_CNT);
		SM_TEST(r >= 0);
		if (r < 0)
			return r;

delay(3, "parent: release 1");
		cnt = 0;
		do
		{
			r = sm_sem_rel(semid, 0, 0);
			if (r < 0)
			{
				sleep(1);
				++cnt;
			}
		} while (r < 0 && cnt <= MAX_CNT);
		SM_TEST(r >= 0);
		if (r < 0)
			return r;

delay(1, "parent: getval");
		cnt = 0;
		do
		{
			r = sm_sem_get(semid, 0);
			if (r <= 0)
			{
				sleep(1);
				++cnt;
			}
		} while (r <= 0 && cnt <= MAX_CNT);
		SM_TEST(r > 0);
		if (r <= 0)
			return r;

delay(1, "parent: acquire 2");
		cnt = 0;
		do
		{
			r = sm_sem_acq(semid, 0, 0);
			if (r < 0)
			{
				sleep(1);
				++cnt;
			}
		} while (r < 0 && cnt <= MAX_CNT);
		SM_TEST(r >= 0);
		if (r < 0)
			return r;

cnt = 0;
		do
		{
			r = sm_sem_rel(semid, 0, 0);
			if (r < 0)
			{
				sleep(1);
				++cnt;
			}
		} while (r < 0 && cnt <= MAX_CNT);
		SM_TEST(r >= 0);
		if (r < 0)
			return r;
	}
	else
	{
		delay(1, "child: acquire 1");
		cnt = 0;
		do
		{
			r = sm_sem_acq(semid, 0, 0);
			if (r < 0)
			{
				sleep(1);
				++cnt;
			}
		} while (r < 0 && cnt <= MAX_CNT);
		SM_TEST(r >= 0);
		if (r < 0)
			return r;

delay(1, "child: release 1");
		cnt = 0;
		do
		{
			r = sm_sem_rel(semid, 0, 0);
			if (r < 0)
			{
				sleep(1);
				++cnt;
			}
		} while (r < 0 && cnt <= MAX_CNT);
		SM_TEST(r >= 0);
		if (r < 0)
			return r;

}
	if (owner)
		return sm_sem_stop(semid);
	return 0;
}

int
main(argc, argv)
	int argc;
	char *argv[];
{
	bool interactive = false;
	bool owner = false;
	int ch, r;
	uid_t uid;
	gid_t gid;

uid = 0;
	gid = 0;
	r = 0;

# define OPTIONS	"iog:u:"
	while ((ch = getopt(argc, argv, OPTIONS)) != -1)
	{
		switch ((char) ch)
		{
		  case 'g':
			gid = (gid_t)strtoul(optarg, 0, 0);
			break;

case 'i':
			interactive = true;
			break;

case 'u':
			uid = (uid_t)strtoul(optarg, 0, 0);
			break;

case 'o':
			owner = true;
			break;

default:
			break;
		}
	}

if (interactive)
		r = seminter(owner);
	else
	{
		pid_t pid;

printf("This test takes about 8 seconds.\n");
		printf("If it takes longer than 30 seconds, please interrupt it\n");
		printf("and compile again without semaphore support, i.e.,");
		printf("-DSM_CONF_SEM=0\n");
		if ((pid = fork()) < 0)
		{
			perror("fork failed\n");
			return -1;
		}

sm_test_begin(argc, argv, "test semaphores");
		if (pid == 0)
		{
			/* give the parent the chance to setup data */
			sleep(1);
			r = semtest(false, uid, gid);
		}
		else
		{
			r = semtest(true, uid, gid);
		}
		SM_TEST(r == 0);
		return sm_test_end();
	}
	return r;
}
#else /* SM_CONF_SEM */
int
main(argc, argv)
	int argc;
	char *argv[];
{
	printf("No support for semaphores configured on this machine\n");
	return 0;
}
#endif /* SM_CONF_SEM */

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