123 lines
2.9 KiB
C
123 lines
2.9 KiB
C
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/*++
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/* NAME
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/* msg_syslog 3
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/* SUMMARY
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/* direct diagnostics to syslog daemon
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/* SYNOPSIS
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/* #include <msg_syslog.h>
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/*
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/* void msg_syslog_init(progname, log_opt, facility)
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/* const char *progname;
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/* int log_opt;
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/* int facility;
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/* DESCRIPTION
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/* This module implements support to report msg(3) diagnostics
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/* via the syslog daemon.
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/*
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/* msg_syslog_init() is a wrapper around the openlog(3) routine
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/* that directs subsequent msg(3) output to the syslog daemon.
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/* SEE ALSO
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/* syslog(3) syslog library
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/* msg(3) diagnostics module
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/* BUGS
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/* Output records are truncated to 2000 characters. This is done in
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/* order to defend against a buffer overflow problem in some
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/* implementations of the syslog() library routine.
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/* LICENSE
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/* .ad
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/* .fi
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/* The Secure Mailer license must be distributed with this software.
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/* AUTHOR(S)
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/* Wietse Venema
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/* IBM T.J. Watson Research
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/* P.O. Box 704
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/* Yorktown Heights, NY 10598, USA
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/*--*/
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/* System libraries. */
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#include <sys_defs.h>
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#include <stdlib.h> /* 44BSD stdarg.h uses abort() */
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#include <stdarg.h>
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#include <errno.h>
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#include <syslog.h>
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/* Application-specific. */
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#include "vstring.h"
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#include "stringops.h"
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#include "msg.h"
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#include "msg_output.h"
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#include "msg_syslog.h"
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/*
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* Stay a little below the 2048-byte limit of older syslog() implementations.
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*/
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#define MSG_SYSLOG_RECLEN 2000
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/* msg_syslog_print - log info to syslog daemon */
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static void msg_syslog_print(int level, const char *text)
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{
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static int log_level[] = {
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LOG_INFO, LOG_WARNING, LOG_ERR, LOG_CRIT, LOG_CRIT,
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};
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static char *severity_name[] = {
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"info", "warning", "error", "fatal", "panic",
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};
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if (level < 0 || level >= (int) (sizeof(log_level) / sizeof(log_level[0])))
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msg_panic("msg_syslog_print: invalid severity level: %d", level);
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if (level == MSG_INFO) {
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syslog(log_level[level], "%.*s", MSG_SYSLOG_RECLEN, text);
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} else {
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syslog(log_level[level], "%s: %.*s",
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severity_name[level], MSG_SYSLOG_RECLEN, text);
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}
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}
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/* msg_syslog_init - initialize */
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void msg_syslog_init(const char *name, int logopt, int facility)
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{
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static int first_call = 1;
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openlog(name, LOG_NDELAY | logopt, facility);
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if (first_call) {
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first_call = 0;
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msg_output(msg_syslog_print);
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}
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}
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#ifdef TEST
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/*
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* Proof-of-concept program to test the syslogging diagnostics interface
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*
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* Usage: msg_syslog_test text...
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*/
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main(int argc, char **argv)
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{
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VSTRING *vp = vstring_alloc(256);
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msg_syslog_init(argv[0], LOG_PID, LOG_MAIL);
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if (argc < 2)
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msg_error("usage: %s text to be logged", argv[0]);
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while (--argc && *++argv) {
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vstring_strcat(vp, *argv);
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if (argv[1])
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vstring_strcat(vp, " ");
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}
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msg_warn("static text");
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msg_warn("dynamic text: >%s<", vstring_str(vp));
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msg_warn("dynamic numeric: >%d<", 42);
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msg_warn("error text: >%m<");
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msg_warn("dynamic: >%s<: error: >%m<", vstring_str(vp));
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vstring_free(vp);
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return (0);
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}
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#endif
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