--- /dev/null
+/*
+ * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License"). You may not use this file except in compliance with the
+ * License. Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
+ *
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+/*
+ * Copyright (c) 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.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/syslog.h>
+#include <sys/uio.h>
+#include <sys/un.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>
+
+#ifdef __STDC__
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+#include <crt_externs.h>
+
+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 */
+
+/*
+ * syslog, vsyslog --
+ * print message on log file; output is intended for syslogd(8).
+ */
+void
+#ifdef __STDC__
+syslog(int pri, const char *fmt, ...)
+#else
+syslog(pri, fmt, va_alist)
+ int pri;
+ char *fmt;
+ va_dcl
+#endif
+{
+ va_list ap;
+
+#ifdef __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;
+#define TBUF_LEN 2048
+#define FMT_LEN 1024
+ char *stdp, tbuf[TBUF_LEN], fmt_cpy[FMT_LEN];
+ int tbuf_left, fmt_left, prlen;
+
+#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. */
+
+ /*
+ * Although it's tempting, we can't ignore the possibility of
+ * overflowing the buffer when assembling the "fixed" portion
+ * of the message. Strftime's "%h" directive expands to the
+ * locale's abbreviated month name, but if the user has the
+ * ability to construct to his own locale files, it may be
+ * arbitrarily long.
+ */
+ (void)time(&now);
+
+ p = tbuf;
+ tbuf_left = TBUF_LEN;
+
+#define DEC() \
+ do { \
+ if (prlen >= tbuf_left) \
+ prlen = tbuf_left - 1; \
+ p += prlen; \
+ tbuf_left -= prlen; \
+ } while (0)
+
+ prlen = snprintf(p, tbuf_left, "<%d>", pri);
+ DEC();
+
+ prlen = strftime(p, tbuf_left, "%h %e %T ", localtime(&now));
+ DEC();
+
+ if (LogStat & LOG_PERROR)
+ stdp = p;
+ if (LogTag == NULL)
+ LogTag = *(*_NSGetArgv());
+ if (LogTag != NULL) {
+ prlen = snprintf(p, tbuf_left, "%s", LogTag);
+ DEC();
+ }
+ if (LogStat & LOG_PID) {
+ prlen = snprintf(p, tbuf_left, "[%d]", getpid());
+ DEC();
+ }
+ if (LogTag != NULL) {
+ if (tbuf_left > 1) {
+ *p++ = ':';
+ tbuf_left--;
+ }
+ if (tbuf_left > 1) {
+ *p++ = ' ';
+ tbuf_left--;
+ }
+ }
+
+ /*
+ * We wouldn't need this mess if printf handled %m, or if
+ * strerror() had been invented before syslog().
+ */
+ for (t = fmt_cpy, fmt_left = FMT_LEN; (ch = *fmt); ++fmt) {
+ if (ch == '%' && fmt[1] == 'm') {
+ ++fmt;
+ prlen = snprintf(t, fmt_left, "%s",
+ strerror(saved_errno));
+ if (prlen >= fmt_left)
+ prlen = fmt_left - 1;
+ t += prlen;
+ fmt_left -= prlen;
+ } else {
+ if (fmt_left > 1) {
+ *t++ = ch;
+ fmt_left--;
+ }
+ }
+ }
+ *t = '\0';
+
+ prlen = vsnprintf(p, tbuf_left, fmt_cpy, ap);
+ DEC();
+ cnt = p - tbuf;
+
+ /* Output to stderr if requested. */
+ if (LogStat & LOG_PERROR) {
+ struct iovec iov[2];
+
+ iov[0].iov_base = stdp;
+ iov[0].iov_len = cnt - (stdp - tbuf);
+ iov[1].iov_base = "\n";
+ iov[1].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) {
+ struct iovec iov[2];
+
+ p = strchr(tbuf, '>') + 1;
+ iov[0].iov_base = p;
+ iov[0].iov_len = cnt - (p - tbuf);
+ iov[1].iov_base = "\r\n";
+ iov[1].iov_len = 2;
+ (void)writev(fd, iov, 2);
+ (void)close(fd);
+ }
+}
+
+static struct sockaddr_un 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.sun_family = AF_UNIX;
+ (void)strncpy(SyslogAddr.sun_path, _PATH_LOG,
+ sizeof(SyslogAddr.sun_path));
+ 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);
+}
projects / apple / libc.git / blobdiff