ftp.nice.ch/Attic/openStep/implementation/gnustep/sources/alpha-snapshots/pthreads.0.9.2.tgz#/pthreads-0.9.2/stdlib/errorlog.c

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/* 
 * Error routines for programs that can run as a daemon. 
 */
#include <syslog.h>
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "errorlog.h"

/* 
 * Print a message and return to caller. Caller specifies "errnoflag" and
 * "priority".
 */
static void
log_doit(int errnoflag, int priority, const char *fmt, va_list ap)
{
	int		errno_save;
	char	buf[ERRLOG_C_STRLEN + 1];

        pthread_lock_global_np();
	errno_save = errno;		/* value caller might want printed */
	vsprintf(buf, fmt, ap);
	if (errnoflag)
		sprintf(buf+strlen(buf), ": %s", strerror(errno_save));
	strcat(buf, "\n");
	syslog(priority, buf);
        pthread_unlock_global_np();
}


/* 
 * Initialize syslog(), if running as daemon.
 */
void
log_open( const char *ident, int option, int facility )
{
   pthread_lock_global_np();
   openlog(ident, option, facility);
   pthread_unlock_global_np();
}

/* 
 * Nonfatal error related to a system call.
 * Print a message with the system's errno value and return.
 **/
void
log_ret(const char *fmt, ...)
{
	va_list		ap;

	pthread_lock_global_np();
	va_start(ap, fmt);
	log_doit(1, LOG_ERR, fmt, ap);
	va_end(ap);
	pthread_unlock_global_np();
}

/* 
 * Fatal error related to a system call.  Print a message and terminate. 
 */
void
log_sys(const char *fmt, ...)
{
	va_list		ap;

	pthread_lock_global_np();
	va_start(ap, fmt);
	log_doit(1, LOG_ERR, fmt, ap);
	va_end(ap);
	exit(2);
	pthread_unlock_global_np();  /* NEVER GETS HERE */
}

/* 
 * Nonfatal error unrelated to a system call. Print a message and return.
 */
void
log_msg(const char *fmt, ...)
{
	va_list		ap;

	pthread_lock_global_np();
	va_start(ap, fmt);
	log_doit(0, LOG_ERR, fmt, ap);
	va_end(ap);
	pthread_unlock_global_np();
}

/* Fatal error unrelated to a system call.
 * Print a message and terminate. */

void
log_quit(const char *fmt, ...)
{
	va_list		ap;

	pthread_lock_global_np();
	va_start(ap, fmt);
	log_doit(0, LOG_ERR, fmt, ap);
	va_end(ap);
	exit(2);
	pthread_unlock_global_np();  /* NEVER GETS HERE */
}

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