1 files changed, 235 insertions, 0 deletions
diff --git a/misc/syslog.c b/misc/syslog.c
new file mode 100644
index 0000000000..ba82e23019
--- /dev/null
+++ b/misc/syslog.c
@@ -0,0 +1,235 @@
+/*
+ * Copyright (c) 1983, 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)syslog.c	8.4 (Berkeley) 3/18/94";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/syslog.h>
+#include <sys/uio.h>
+#include <netdb.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <paths.h>
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#if __STDC__
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+static int	LogFile = -1;		/* fd for log */
+static int	connected;		/* have done connect */
+static int	LogStat = 0;		/* status bits, set by openlog() */
+static const char *LogTag = NULL;	/* string to tag the entry with */
+static int	LogFacility = LOG_USER;	/* default facility code */
+static int	LogMask = 0xff;		/* mask of priorities to be logged */
+extern char	*__progname;		/* Program name, from crt0. */
+
+/*
+ * syslog, vsyslog --
+ *	print message on log file; output is intended for syslogd(8).
+ */
+void
+#if __STDC__
+syslog(int pri, const char *fmt, ...)
+#else
+syslog(pri, fmt, va_alist)
+	int pri;
+	char *fmt;
+	va_dcl
+#endif
+{
+	va_list ap;
+
+#if __STDC__
+	va_start(ap, fmt);
+#else
+	va_start(ap);
+#endif
+	vsyslog(pri, fmt, ap);
+	va_end(ap);
+}
+
+void
+vsyslog(pri, fmt, ap)
+	int pri;
+	register const char *fmt;
+	va_list ap;
+{
+	register int cnt;
+	register char ch, *p, *t;
+	time_t now;
+	int fd, saved_errno;
+	char *stdp, tbuf[2048], fmt_cpy[1024];
+
+#define	INTERNALLOG	LOG_ERR|LOG_CONS|LOG_PERROR|LOG_PID
+	/* Check for invalid bits. */
+	if (pri & ~(LOG_PRIMASK|LOG_FACMASK)) {
+		syslog(INTERNALLOG,
+		    "syslog: unknown facility/priority: %x", pri);
+		pri &= LOG_PRIMASK|LOG_FACMASK;
+	}
+
+	/* Check priority against setlogmask values. */
+	if (!LOG_MASK(LOG_PRI(pri)) & LogMask)
+		return;
+
+	saved_errno = errno;
+
+	/* Set default facility if none specified. */
+	if ((pri & LOG_FACMASK) == 0)
+		pri |= LogFacility;
+
+	/* Build the message. */
+	(void)time(&now);
+	p = tbuf + sprintf(tbuf, "<%d>", pri);
+	p += strftime(p, sizeof (tbuf) - (p - tbuf), "%h %e %T ",
+	    localtime(&now));
+	if (LogStat & LOG_PERROR)
+		stdp = p;
+	if (LogTag == NULL)
+		LogTag = __progname;
+	if (LogTag != NULL)
+		p += sprintf(p, "%s", LogTag);
+	if (LogStat & LOG_PID)
+		p += sprintf(p, "[%d]", getpid());
+	if (LogTag != NULL) {
+		*p++ = ':';
+		*p++ = ' ';
+	}
+
+	/* Substitute error message for %m. */
+	for (t = fmt_cpy; ch = *fmt; ++fmt)
+		if (ch == '%' && fmt[1] == 'm') {
+			++fmt;
+			t += sprintf(t, "%s", strerror(saved_errno));
+		} else
+			*t++ = ch;
+	*t = '\0';
+
+	p += vsprintf(p, fmt_cpy, ap);
+	cnt = p - tbuf;
+
+	/* Output to stderr if requested. */
+	if (LogStat & LOG_PERROR) {
+		struct iovec iov[2];
+		register struct iovec *v = iov;
+
+		v->iov_base = stdp;
+		v->iov_len = cnt - (stdp - tbuf);
+		++v;
+		v->iov_base = "\n";
+		v->iov_len = 1;
+		(void)writev(STDERR_FILENO, iov, 2);
+	}
+
+	/* Get connected, output the message to the local logger. */
+	if (!connected)
+		openlog(LogTag, LogStat | LOG_NDELAY, 0);
+	if (send(LogFile, tbuf, cnt, 0) >= 0)
+		return;
+
+	/*
+	 * Output the message to the console; don't worry about blocking,
+	 * if console blocks everything will.  Make sure the error reported
+	 * is the one from the syslogd failure.
+	 */
+	if (LogStat & LOG_CONS &&
+	    (fd = open(_PATH_CONSOLE, O_WRONLY, 0)) >= 0) {
+		(void)strcat(tbuf, "\r\n");
+		cnt += 2;
+		p = index(tbuf, '>') + 1;
+		(void)write(fd, p, cnt - (p - tbuf));
+		(void)close(fd);
+	}
+}
+
+static struct sockaddr SyslogAddr;	/* AF_UNIX address of local logger */
+
+void
+openlog(ident, logstat, logfac)
+	const char *ident;
+	int logstat, logfac;
+{
+	if (ident != NULL)
+		LogTag = ident;
+	LogStat = logstat;
+	if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0)
+		LogFacility = logfac;
+
+	if (LogFile == -1) {
+		SyslogAddr.sa_family = AF_UNIX;
+		(void)strncpy(SyslogAddr.sa_data, _PATH_LOG,
+		    sizeof(SyslogAddr.sa_data));
+		if (LogStat & LOG_NDELAY) {
+			if ((LogFile = socket(AF_UNIX, SOCK_DGRAM, 0)) == -1)
+				return;
+			(void)fcntl(LogFile, F_SETFD, 1);
+		}
+	}
+	if (LogFile != -1 && !connected)
+		if (connect(LogFile, &SyslogAddr, sizeof(SyslogAddr)) == -1) {
+			(void)close(LogFile);
+			LogFile = -1;
+		} else
+			connected = 1;
+}
+
+void
+closelog()
+{
+	(void)close(LogFile);
+	LogFile = -1;
+	connected = 0;
+}
+
+/* setlogmask -- set the log mask level */
+int
+setlogmask(pmask)
+	int pmask;
+{
+	int omask;
+
+	omask = LogMask;
+	if (pmask != 0)
+		LogMask = pmask;
+	return (omask);
+}