File Manager

003 File Manager

Current Path: /usr/src/contrib/sendmail/libsm

usr / src / contrib / sendmail / libsm /

📁 ..
📄 Makefile(346 B)
📄 Makefile.m4(1.92 KB)
📄 README(4.42 KB)
📄 assert.c(4.13 KB)
📄 assert.html(13.86 KB)
📄 b-strcmp.c(3.4 KB)
📄 b-strl.c(5 KB)
📄 cdefs.html(2.39 KB)
📄 cf.c(1.97 KB)
📄 clock.c(13.89 KB)
📄 clrerr.c(872 B)
📄 config.c(4.47 KB)
📄 debug.c(8.91 KB)
📄 debug.html(7.68 KB)
📄 errstring.c(6.03 KB)
📄 exc.c(13.05 KB)
📄 exc.html(23.27 KB)
📄 fclose.c(3.13 KB)
📄 feof.c(961 B)
📄 ferror.c(932 B)
📄 fflush.c(3.1 KB)
📄 fget.c(2.37 KB)
📄 findfp.c(10.65 KB)
📄 flags.c(1.27 KB)
📄 fopen.c(8.3 KB)
📄 fpos.c(3.12 KB)
📄 fprintf.c(1.35 KB)
📄 fpurge.c(1.15 KB)
📄 fput.c(1.25 KB)
📄 fread.c(2.28 KB)
📄 fscanf.c(1.34 KB)
📄 fseek.c(7.25 KB)
📄 fvwrite.c(6.24 KB)
📄 fvwrite.h(740 B)
📄 fwalk.c(1.41 KB)
📄 fwrite.c(1.54 KB)
📄 gen.html(910 B)
📄 get.c(1.12 KB)
📄 glue.h(731 B)
📄 heap.c(17.29 KB)
📄 heap.html(13.07 KB)
📄 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)
📄 memstat.c(5.13 KB)
📄 mpeix.c(13.84 KB)
📄 niprop.c(4.64 KB)
📄 notify.c(3.32 KB)
📄 put.c(1.61 KB)
📄 refill.c(7.09 KB)
📄 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)
📄 signal.c(6.75 KB)
📄 smstdio.c(6.14 KB)
📄 snprintf.c(2.29 KB)
📄 sscanf.c(2.26 KB)
📄 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)
📄 strto.c(5.45 KB)
📄 syslogio.c(4.11 KB)
📄 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)
📄 t-inet6_ntop.c(1.4 KB)
📄 t-match.c(1.1 KB)
📄 t-memstat.c(2.17 KB)
📄 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)
📄 t-strrevcmp.c(994 B)
📄 t-types.c(2.7 KB)
📄 test.c(2.73 KB)
📄 ungetc.c(3.93 KB)
📄 util.c(4.46 KB)
📄 vasprintf.c(2.91 KB)
📄 vfprintf.c(24.09 KB)
📄 vfscanf.c(18.76 KB)
📄 vprintf.c(999 B)
📄 vsnprintf.c(1.87 KB)
📄 wbuf.c(2.51 KB)
📄 wsetup.c(1.88 KB)
📄 xtrap.c(653 B)

Editing: signal.c

/*
 * Copyright (c) 2000-2001 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: signal.c,v 1.18 2013-11-22 20:51:43 ca Exp $")

#if SM_CONF_SETITIMER
# include <sm/time.h>
#endif
#include <errno.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <sm/clock.h>
#include <sm/signal.h>
#include <signal.h>
#include <sm/string.h>

unsigned int	volatile InCriticalSection; /* >0 if inside critical section */
int		volatile PendingSignal;	/* pending signal to resend */

/*
**  SM_SIGNAL -- set a signal handler
**
**	This is essentially old BSD "signal(3)".
**
**	NOTE:	THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
**		ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
**		DOING.
*/

sigfunc_t
sm_signal(sig, handler)
	int sig;
	sigfunc_t handler;
{
# if defined(SA_RESTART) || (!defined(SYS5SIGNALS) && !defined(BSD4_3))
	struct sigaction n, o;
# endif

/*
	**  First, try for modern signal calls
	**  and restartable syscalls
	*/

# ifdef SA_RESTART
	(void) memset(&n, '\0', sizeof n);
#  if USE_SA_SIGACTION
	n.sa_sigaction = (void(*)(int, siginfo_t *, void *)) handler;
	n.sa_flags = SA_RESTART|SA_SIGINFO;
#  else
	n.sa_handler = handler;
	n.sa_flags = SA_RESTART;
#  endif
	if (sigaction(sig, &n, &o) < 0)
		return SIG_ERR;
	return o.sa_handler;
# else /* SA_RESTART */

/*
	**  Else check for SYS5SIGNALS or
	**  BSD4_3 signals
	*/

#  if defined(SYS5SIGNALS) || defined(BSD4_3)
#   ifdef BSD4_3
	return signal(sig, handler);
#   else
	return sigset(sig, handler);
#   endif
#  else /* defined(SYS5SIGNALS) || defined(BSD4_3) */

/*
	**  Finally, if nothing else is available,
	**  go for a default
	*/

(void) memset(&n, '\0', sizeof n);
	n.sa_handler = handler;
	if (sigaction(sig, &n, &o) < 0)
		return SIG_ERR;
	return o.sa_handler;
#  endif /* defined(SYS5SIGNALS) || defined(BSD4_3) */
# endif /* SA_RESTART */
}
/*
**  SM_BLOCKSIGNAL -- hold a signal to prevent delivery
**
**	Parameters:
**		sig -- the signal to block.
**
**	Returns:
**		1 signal was previously blocked
**		0 signal was not previously blocked
**		-1 on failure.
*/

int
sm_blocksignal(sig)
	int sig;
{
# ifdef BSD4_3
#  ifndef sigmask
#   define sigmask(s)	(1 << ((s) - 1))
#  endif
	return (sigblock(sigmask(sig)) & sigmask(sig)) != 0;
# else /* BSD4_3 */
#  ifdef ALTOS_SYSTEM_V
	sigfunc_t handler;

handler = sigset(sig, SIG_HOLD);
	if (handler == SIG_ERR)
		return -1;
	else
		return handler == SIG_HOLD;
#  else /* ALTOS_SYSTEM_V */
	sigset_t sset, oset;

(void) sigemptyset(&sset);
	(void) sigaddset(&sset, sig);
	if (sigprocmask(SIG_BLOCK, &sset, &oset) < 0)
		return -1;
	else
		return sigismember(&oset, sig);
#  endif /* ALTOS_SYSTEM_V */
# endif /* BSD4_3 */
}
/*
**  SM_RELEASESIGNAL -- release a held signal
**
**	Parameters:
**		sig -- the signal to release.
**
**	Returns:
**		1 signal was previously blocked
**		0 signal was not previously blocked
**		-1 on failure.
*/

int
sm_releasesignal(sig)
	int sig;
{
# ifdef BSD4_3
	return (sigsetmask(sigblock(0) & ~sigmask(sig)) & sigmask(sig)) != 0;
# else /* BSD4_3 */
#  ifdef ALTOS_SYSTEM_V
	sigfunc_t handler;

handler = sigset(sig, SIG_HOLD);
	if (sigrelse(sig) < 0)
		return -1;
	else
		return handler == SIG_HOLD;
#  else /* ALTOS_SYSTEM_V */
	sigset_t sset, oset;

(void) sigemptyset(&sset);
	(void) sigaddset(&sset, sig);
	if (sigprocmask(SIG_UNBLOCK, &sset, &oset) < 0)
		return -1;
	else
		return sigismember(&oset, sig);
#  endif /* ALTOS_SYSTEM_V */
# endif /* BSD4_3 */
}
/*
**  PEND_SIGNAL -- Add a signal to the pending signal list
**
**	Parameters:
**		sig -- signal to add
**
**	Returns:
**		none.
**
**	NOTE:	THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
**		ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
**		DOING.
*/

void
pend_signal(sig)
	int sig;
{
	int sigbit;
	int save_errno = errno;
#if SM_CONF_SETITIMER
	struct itimerval clr;
#endif

/*
	**  Don't want to interrupt something critical, hence delay
	**  the alarm for one second.  Hopefully, by then we
	**  will be out of the critical section.  If not, then
	**  we will just delay again.  The events to be run will
	**  still all be run, maybe just a little bit late.
	*/

switch (sig)
	{
	  case SIGHUP:
		sigbit = PEND_SIGHUP;
		break;

case SIGINT:
		sigbit = PEND_SIGINT;
		break;

case SIGTERM:
		sigbit = PEND_SIGTERM;
		break;

case SIGUSR1:
		sigbit = PEND_SIGUSR1;
		break;

case SIGALRM:
		/* don't have to pend these */
		sigbit = 0;
		break;

default:
		/* If we get here, we are in trouble */
		abort();

/* NOTREACHED */
		/* shut up stupid compiler warning on HP-UX 11 */
		sigbit = 0;
		break;
	}

if (sigbit != 0)
		PendingSignal |= sigbit;
	(void) sm_signal(SIGALRM, sm_tick);
#if SM_CONF_SETITIMER
	clr.it_interval.tv_sec = 0;
	clr.it_interval.tv_usec = 0;
	clr.it_value.tv_sec = 1;
	clr.it_value.tv_usec = 0;
	(void) setitimer(ITIMER_REAL, &clr, NULL);
#else /* SM_CONF_SETITIMER */
	(void) alarm(1);
#endif /* SM_CONF_SETITIMER */
	errno = save_errno;
}
/*
**  SM_ALLSIGNALS -- act on all signals
**
**	Parameters:
**		block -- whether to block or release all signals.
**
**	Returns:
**		none.
*/

void
sm_allsignals(block)
	bool block;
{
# ifdef BSD4_3
#  ifndef sigmask
#   define sigmask(s)	(1 << ((s) - 1))
#  endif
	if (block)
	{
		int mask = 0;

(void) sigblock(mask);
	}
	else
		sigsetmask(0);
# else /* BSD4_3 */
#  ifdef ALTOS_SYSTEM_V
	if (block)
	{
		(void) sigset(SIGALRM, SIG_HOLD);
		(void) sigset(SIGCHLD, SIG_HOLD);
		(void) sigset(SIGHUP, SIG_HOLD);
		(void) sigset(SIGINT, SIG_HOLD);
		(void) sigset(SIGTERM, SIG_HOLD);
		(void) sigset(SIGUSR1, SIG_HOLD);
	}
	else
	{
		(void) sigset(SIGALRM, SIG_DFL);
		(void) sigset(SIGCHLD, SIG_DFL);
		(void) sigset(SIGHUP, SIG_DFL);
		(void) sigset(SIGINT, SIG_DFL);
		(void) sigset(SIGTERM, SIG_DFL);
		(void) sigset(SIGUSR1, SIG_DFL);
	}
#  else /* ALTOS_SYSTEM_V */
	sigset_t sset;

(void) sigemptyset(&sset);
	(void) sigaddset(&sset, SIGALRM);
	(void) sigaddset(&sset, SIGCHLD);
	(void) sigaddset(&sset, SIGHUP);
	(void) sigaddset(&sset, SIGINT);
	(void) sigaddset(&sset, SIGTERM);
	(void) sigaddset(&sset, SIGUSR1);
	(void) sigprocmask(block ? SIG_BLOCK : SIG_UNBLOCK, &sset, NULL);
#  endif /* ALTOS_SYSTEM_V */
# endif /* BSD4_3 */
}
/*
**  SM_SIGNAL_NOOP -- A signal no-op function
**
**	Parameters:
**		sig -- signal received
**
**	Returns:
**		SIGFUNC_RETURN
*/

/* ARGSUSED */
SIGFUNC_DECL
sm_signal_noop(sig)
	int sig;
{
	int save_errno = errno;

FIX_SYSV_SIGNAL(sig, sm_signal_noop);
	errno = save_errno;
	return SIGFUNC_RETURN;
}

003 File Manager

Editing: signal.c

Upload File

Create Folder