43fa6fe319
identifier namespace by renaming non standard functions and variables such that they have a leading underscore. The library will use those names internally. Weak aliases are used to provide the original names to the API. This is only the first part of this change. It is most of the functions which are implemented in C for all NetBSD ports. Subsequent changes are to add the same support to the remaining C files, to assembly files, and to the automagically generated assembly source used for system calls. When all of the above is done, ports with weak alias support should add a definition for __weak_alias to <sys/cdefs.h>.
306 lines
7.6 KiB
C
306 lines
7.6 KiB
C
/* $NetBSD: syslog.c,v 1.12 1997/07/21 14:07:37 jtc Exp $ */
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/*
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* Copyright (c) 1983, 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)syslog.c 8.4 (Berkeley) 3/18/94";
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#else
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__RCSID("$NetBSD: syslog.c,v 1.12 1997/07/21 14:07:37 jtc Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/syslog.h>
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#include <sys/uio.h>
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#include <netdb.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#if __STDC__
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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#ifdef __weak_alias
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__weak_alias(closelog,_closelog);
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__weak_alias(openlog,_openlog);
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__weak_alias(setlogmask,_setlogmask);
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__weak_alias(syslog,_syslog);
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__weak_alias(vsyslog,_vsyslog);
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#endif
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static int LogFile = -1; /* fd for log */
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static int connected; /* have done connect */
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static int LogStat = 0; /* status bits, set by openlog() */
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static const char *LogTag = NULL; /* string to tag the entry with */
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static int LogFacility = LOG_USER; /* default facility code */
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static int LogMask = 0xff; /* mask of priorities to be logged */
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extern char *__progname; /* Program name, from crt0. */
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/*
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* syslog, vsyslog --
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* print message on log file; output is intended for syslogd(8).
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*/
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void
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#if __STDC__
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syslog(int pri, const char *fmt, ...)
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#else
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syslog(pri, fmt, va_alist)
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int pri;
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char *fmt;
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va_dcl
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#endif
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{
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va_list ap;
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#if __STDC__
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va_start(ap, fmt);
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#else
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va_start(ap);
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#endif
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vsyslog(pri, fmt, ap);
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va_end(ap);
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}
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void
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vsyslog(pri, fmt, ap)
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int pri;
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register const char *fmt;
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va_list ap;
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{
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register int cnt;
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register char ch, *p, *t;
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time_t now;
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int fd, saved_errno;
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#define TBUF_LEN 2048
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#define FMT_LEN 1024
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char *stdp = NULL; /* pacify gcc */
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char tbuf[TBUF_LEN], fmt_cpy[FMT_LEN];
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int tbuf_left, fmt_left, prlen;
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#define INTERNALLOG LOG_ERR|LOG_CONS|LOG_PERROR|LOG_PID
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/* Check for invalid bits. */
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if (pri & ~(LOG_PRIMASK|LOG_FACMASK)) {
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syslog(INTERNALLOG,
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"syslog: unknown facility/priority: %x", pri);
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pri &= LOG_PRIMASK|LOG_FACMASK;
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}
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/* Check priority against setlogmask values. */
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if (!(LOG_MASK(LOG_PRI(pri)) & LogMask))
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return;
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saved_errno = errno;
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/* Set default facility if none specified. */
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if ((pri & LOG_FACMASK) == 0)
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pri |= LogFacility;
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/* Build the message. */
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/*
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* Although it's tempting, we can't ignore the possibility of
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* overflowing the buffer when assembling the "fixed" portion
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* of the message. Strftime's "%h" directive expands to the
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* locale's abbreviated month name, but if the user has the
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* ability to construct to his own locale files, it may be
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* arbitrarily long.
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*/
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(void)time(&now);
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p = tbuf;
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tbuf_left = TBUF_LEN;
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#define DEC() \
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do { \
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if (prlen >= tbuf_left) \
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prlen = tbuf_left - 1; \
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p += prlen; \
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tbuf_left -= prlen; \
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} while (0)
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prlen = snprintf(p, tbuf_left, "<%d>", pri);
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DEC();
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prlen = strftime(p, tbuf_left, "%h %e %T ", localtime(&now));
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DEC();
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if (LogStat & LOG_PERROR)
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stdp = p;
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if (LogTag == NULL)
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LogTag = __progname;
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if (LogTag != NULL) {
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prlen = snprintf(p, tbuf_left, "%s", LogTag);
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DEC();
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}
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if (LogStat & LOG_PID) {
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prlen = snprintf(p, tbuf_left, "[%d]", getpid());
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DEC();
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}
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if (LogTag != NULL) {
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if (tbuf_left > 1) {
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*p++ = ':';
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tbuf_left--;
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}
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if (tbuf_left > 1) {
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*p++ = ' ';
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tbuf_left--;
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}
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}
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/*
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* We wouldn't need this mess if printf handled %m, or if
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* strerror() had been invented before syslog().
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*/
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for (t = fmt_cpy, fmt_left = FMT_LEN; (ch = *fmt) != '\0'; ++fmt) {
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if (ch == '%' && fmt[1] == 'm') {
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++fmt;
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prlen = snprintf(t, fmt_left, "%s",
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strerror(saved_errno));
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if (prlen >= fmt_left)
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prlen = fmt_left - 1;
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t += prlen;
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fmt_left -= prlen;
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} else {
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if (fmt_left > 1) {
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*t++ = ch;
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fmt_left--;
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}
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}
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}
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*t = '\0';
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prlen = vsnprintf(p, tbuf_left, fmt_cpy, ap);
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DEC();
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cnt = p - tbuf;
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/* Output to stderr if requested. */
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if (LogStat & LOG_PERROR) {
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struct iovec iov[2];
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iov[0].iov_base = stdp;
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iov[0].iov_len = cnt - (stdp - tbuf);
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iov[1].iov_base = "\n";
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iov[1].iov_len = 1;
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(void)writev(STDERR_FILENO, iov, 2);
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}
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/* Get connected, output the message to the local logger. */
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if (!connected)
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openlog(LogTag, LogStat | LOG_NDELAY, 0);
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if (send(LogFile, tbuf, cnt, 0) >= 0)
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return;
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/*
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* Output the message to the console; don't worry about blocking,
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* if console blocks everything will. Make sure the error reported
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* is the one from the syslogd failure.
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*/
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if (LogStat & LOG_CONS &&
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(fd = open(_PATH_CONSOLE, O_WRONLY, 0)) >= 0) {
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struct iovec iov[2];
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p = strchr(tbuf, '>') + 1;
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iov[0].iov_base = p;
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iov[0].iov_len = cnt - (p - tbuf);
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iov[1].iov_base = "\r\n";
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iov[1].iov_len = 2;
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(void)writev(fd, iov, 2);
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(void)close(fd);
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}
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}
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static struct sockaddr SyslogAddr; /* AF_UNIX address of local logger */
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void
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openlog(ident, logstat, logfac)
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const char *ident;
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int logstat, logfac;
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{
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if (ident != NULL)
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LogTag = ident;
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LogStat = logstat;
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if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0)
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LogFacility = logfac;
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if (LogFile == -1) {
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SyslogAddr.sa_family = AF_UNIX;
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(void)strncpy(SyslogAddr.sa_data, _PATH_LOG,
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sizeof(SyslogAddr.sa_data));
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if (LogStat & LOG_NDELAY) {
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if ((LogFile = socket(AF_UNIX, SOCK_DGRAM, 0)) == -1)
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return;
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(void)fcntl(LogFile, F_SETFD, 1);
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}
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}
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if (LogFile != -1 && !connected)
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if (connect(LogFile, &SyslogAddr, sizeof(SyslogAddr)) == -1) {
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(void)close(LogFile);
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LogFile = -1;
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} else
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connected = 1;
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}
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void
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closelog()
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{
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(void)close(LogFile);
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LogFile = -1;
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connected = 0;
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}
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/* setlogmask -- set the log mask level */
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int
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setlogmask(pmask)
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int pmask;
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{
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int omask;
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omask = LogMask;
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if (pmask != 0)
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LogMask = pmask;
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return (omask);
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}
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