mirror of
https://sourceware.org/git/glibc.git
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Moved to sysdeps/generic.
This commit is contained in:
Ulrich Drepper
parent
57c6c64a3b
commit
d990ebaaf1
414
misc/syslog.c
414
misc/syslog.c
@ -1,414 +0,0 @@
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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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* 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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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)syslog.c 8.4 (Berkeley) 3/18/94";
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#endif /* LIBC_SCCS and not lint */
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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 <stdio_ext.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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#include <stdlib.h>
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#include <bits/libc-lock.h>
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#include <signal.h>
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#include <locale.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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#include <libio/iolibio.h>
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#define ftell(s) INTUSE(_IO_ftell) (s)
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static int LogType = SOCK_DGRAM; /* type of socket connection */
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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; /* status bits, set by openlog() */
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static const char *LogTag; /* 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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/* Define the lock. */
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__libc_lock_define_initialized (static, syslog_lock)
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static void openlog_internal(const char *, int, int) internal_function;
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static void closelog_internal(void);
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static void sigpipe_handler (int);
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struct cleanup_arg
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{
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void *buf;
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struct sigaction *oldaction;
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};
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static void
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cancel_handler (void *ptr)
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{
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/* Restore the old signal handler. */
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struct cleanup_arg *clarg = (struct cleanup_arg *) ptr;
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if (clarg != NULL && clarg->oldaction != NULL)
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__sigaction (SIGPIPE, clarg->oldaction, NULL);
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/* Free the lock. */
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__libc_lock_unlock (syslog_lock);
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}
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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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libc_hidden_def (syslog)
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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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struct tm now_tm;
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time_t now;
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int fd;
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FILE *f;
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char *buf = 0;
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size_t bufsize = 0;
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size_t prioff, msgoff;
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struct sigaction action, oldaction;
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int sigpipe;
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int saved_errno = errno;
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char failbuf[3 * sizeof (pid_t) + sizeof "out of memory []"];
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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) == 0)
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return;
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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 in a memory-buffer stream. */
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f = open_memstream (&buf, &bufsize);
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if (f == NULL)
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{
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/* We cannot get a stream. There is not much we can do but
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emitting an error messages. */
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char numbuf[3 * sizeof (pid_t)];
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char *nump;
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char *endp = __stpcpy (failbuf, "out of memory [");
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pid_t pid = __getpid ();
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nump = numbuf + sizeof (numbuf);
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/* The PID can never be zero. */
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do
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*--nump = '0' + pid % 10;
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while ((pid /= 10) != 0);
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endp = __mempcpy (endp, nump, (numbuf + sizeof (numbuf)) - nump);
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*endp++ = ']';
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*endp = '\0';
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buf = failbuf;
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bufsize = endp - failbuf;
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msgoff = 0;
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}
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else
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{
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__fsetlocking (f, FSETLOCKING_BYCALLER);
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prioff = fprintf (f, "<%d>", pri);
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(void) time (&now);
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f->_IO_write_ptr += __strftime_l (f->_IO_write_ptr,
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f->_IO_write_end
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- f->_IO_write_ptr,
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"%h %e %T ",
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__localtime_r (&now, &now_tm),
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&_nl_C_locobj);
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msgoff = ftell (f);
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if (LogTag == NULL)
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LogTag = __progname;
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if (LogTag != NULL)
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fputs_unlocked (LogTag, f);
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if (LogStat & LOG_PID)
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fprintf (f, "[%d]", (int) __getpid ());
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if (LogTag != NULL)
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{
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putc_unlocked (':', f);
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putc_unlocked (' ', f);
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}
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/* Restore errno for %m format. */
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__set_errno (saved_errno);
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/* We have the header. Print the user's format into the
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buffer. */
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vfprintf (f, fmt, ap);
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/* Close the memory stream; this will finalize the data
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into a malloc'd buffer in BUF. */
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fclose (f);
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}
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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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register struct iovec *v = iov;
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v->iov_base = buf + msgoff;
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v->iov_len = bufsize - msgoff;
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/* Append a newline if necessary. */
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if (buf[bufsize - 1] != '\n')
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{
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++v;
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v->iov_base = (char *) "\n";
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v->iov_len = 1;
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}
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__libc_cleanup_push (free, buf == failbuf ? NULL : buf);
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/* writev is a cancellation point. */
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(void)__writev(STDERR_FILENO, iov, v - iov + 1);
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__libc_cleanup_pop (0);
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}
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/* Prepare for multiple users. We have to take care: open and
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write are cancellation points. */
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struct cleanup_arg clarg;
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clarg.buf = buf;
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clarg.oldaction = NULL;
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__libc_cleanup_push (cancel_handler, &clarg);
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__libc_lock_lock (syslog_lock);
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/* Prepare for a broken connection. */
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memset (&action, 0, sizeof (action));
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action.sa_handler = sigpipe_handler;
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sigemptyset (&action.sa_mask);
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sigpipe = __sigaction (SIGPIPE, &action, &oldaction);
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if (sigpipe == 0)
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clarg.oldaction = &oldaction;
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/* Get connected, output the message to the local logger. */
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if (!connected)
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openlog_internal(LogTag, LogStat | LOG_NDELAY, 0);
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/* If we have a SOCK_STREAM connection, also send ASCII NUL as
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a record terminator. */
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if (LogType == SOCK_STREAM)
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++bufsize;
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if (!connected || __send(LogFile, buf, bufsize, 0) < 0)
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{
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if (connected)
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{
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/* Try to reopen the syslog connection. Maybe it went
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down. */
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closelog_internal ();
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openlog_internal(LogTag, LogStat | LOG_NDELAY, 0);
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}
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if (!connected || __send(LogFile, buf, bufsize, 0) < 0)
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{
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closelog_internal (); /* attempt re-open next time */
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/*
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* Output the message to the console; don't worry
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* about blocking, if console blocks everything will.
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* Make sure the error reported is the one from the
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* syslogd failure.
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*/
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if (LogStat & LOG_CONS &&
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(fd = __open(_PATH_CONSOLE, O_WRONLY|O_NOCTTY, 0)) >= 0)
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{
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dprintf (fd, "%s\r\n", buf + msgoff);
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(void)__close(fd);
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}
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}
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}
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if (sigpipe == 0)
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__sigaction (SIGPIPE, &oldaction, (struct sigaction *) NULL);
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/* End of critical section. */
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__libc_cleanup_pop (0);
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__libc_lock_unlock (syslog_lock);
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if (buf != failbuf)
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free (buf);
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}
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libc_hidden_def (vsyslog)
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static struct sockaddr SyslogAddr; /* AF_UNIX address of local logger */
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static void
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internal_function
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openlog_internal(const char *ident, int logstat, int 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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int retry = 0;
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while (retry < 2) {
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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, LogType, 0))
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== -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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{
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int old_errno = errno;
|
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if (__connect(LogFile, &SyslogAddr, sizeof(SyslogAddr))
|
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== -1)
|
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{
|
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int saved_errno = errno;
|
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int fd = LogFile;
|
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LogFile = -1;
|
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(void)__close(fd);
|
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__set_errno (old_errno);
|
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if (saved_errno == EPROTOTYPE)
|
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{
|
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/* retry with the other type: */
|
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LogType = (LogType == SOCK_DGRAM
|
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? SOCK_STREAM : SOCK_DGRAM);
|
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++retry;
|
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continue;
|
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||||||
}
|
|
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} else
|
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connected = 1;
|
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||||||
}
|
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break;
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||||||
}
|
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||||||
}
|
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||||||
|
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||||||
void
|
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openlog (const char *ident, int logstat, int logfac)
|
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||||||
{
|
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/* Protect against multiple users and cancellation. */
|
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__libc_cleanup_push (cancel_handler, NULL);
|
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__libc_lock_lock (syslog_lock);
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openlog_internal (ident, logstat, logfac);
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|
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||||||
__libc_cleanup_pop (1);
|
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||||||
}
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||||||
|
|
||||||
static void
|
|
||||||
sigpipe_handler (int signo)
|
|
||||||
{
|
|
||||||
closelog_internal ();
|
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||||||
}
|
|
||||||
|
|
||||||
static void
|
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||||||
closelog_internal()
|
|
||||||
{
|
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||||||
if (!connected)
|
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return;
|
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||||||
|
|
||||||
__close (LogFile);
|
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LogFile = -1;
|
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connected = 0;
|
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||||||
}
|
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||||||
|
|
||||||
void
|
|
||||||
closelog ()
|
|
||||||
{
|
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||||||
/* Protect against multiple users and cancellation. */
|
|
||||||
__libc_cleanup_push (cancel_handler, NULL);
|
|
||||||
__libc_lock_lock (syslog_lock);
|
|
||||||
|
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closelog_internal ();
|
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LogTag = NULL;
|
|
||||||
LogType = SOCK_DGRAM; /* this is the default */
|
|
||||||
|
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||||||
/* Free the lock. */
|
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||||||
__libc_cleanup_pop (1);
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||||||
}
|
|
||||||
|
|
||||||
/* setlogmask -- set the log mask level */
|
|
||||||
int
|
|
||||||
setlogmask(pmask)
|
|
||||||
int pmask;
|
|
||||||
{
|
|
||||||
int omask;
|
|
||||||
|
|
||||||
omask = LogMask;
|
|
||||||
if (pmask != 0)
|
|
||||||
LogMask = pmask;
|
|
||||||
return (omask);
|
|
||||||
}
|
|
||||||
Loading…
Reference in New Issue
Block a user