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124 lines
2.8 KiB
124 lines
2.8 KiB
2 months ago
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/*
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* UCW Library -- Logging to Syslog
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*
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* (c) 2009 Martin Mares <mj@ucw.cz>
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* (c) 2008 Tomas Gavenciak <gavento@ucw.cz>
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*
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* This software may be freely distributed and used according to the terms
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* of the GNU Lesser General Public License.
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*/
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#include <ucw/lib.h>
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#include <ucw/log.h>
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#include <string.h>
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#include <syslog.h>
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struct syslog_stream {
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struct log_stream ls;
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int facility;
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};
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static int syslog_open_count;
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static void
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syslog_close(struct log_stream *ls UNUSED)
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{
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if (!--syslog_open_count)
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closelog();
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}
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/* Convert syslog facility to its identifier. */
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static int
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syslog_facility(const char *name)
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{
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// Unfortunately, there is no standard way how to get at the list of facility names
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static const struct {
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const char *name;
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int id;
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} facilities[] = {
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{ "auth", LOG_AUTH },
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{ "authpriv", LOG_AUTHPRIV },
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{ "cron", LOG_CRON },
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{ "daemon", LOG_DAEMON },
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{ "ftp", LOG_FTP },
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{ "kern", LOG_KERN },
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{ "lpr", LOG_LPR },
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{ "mail", LOG_MAIL },
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{ "news", LOG_NEWS },
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{ "syslog", LOG_SYSLOG },
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{ "user", LOG_USER },
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{ "uucp", LOG_UUCP },
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{ "local0", LOG_LOCAL0 },
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{ "local1", LOG_LOCAL1 },
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{ "local2", LOG_LOCAL2 },
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{ "local3", LOG_LOCAL3 },
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{ "local4", LOG_LOCAL4 },
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{ "local5", LOG_LOCAL5 },
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{ "local6", LOG_LOCAL6 },
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{ "local7", LOG_LOCAL7 },
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};
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for (uint i=0; i < ARRAY_SIZE(facilities); i++)
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if (!strcmp(facilities[i].name, name))
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return facilities[i].id;
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return -1;
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}
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/* Convert severity level to syslog constants */
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static int
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syslog_level(int level)
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{
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static const int levels[] = {
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[L_DEBUG] = LOG_DEBUG,
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[L_INFO] = LOG_INFO,
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[L_INFO_R] = LOG_INFO,
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[L_WARN] = LOG_WARNING,
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[L_WARN_R] = LOG_WARNING,
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[L_ERROR] = LOG_ERR,
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[L_ERROR_R] = LOG_ERR,
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[L_FATAL] = LOG_CRIT,
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};
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return ((level < (int)ARRAY_SIZE(levels)) ? levels[level] : LOG_NOTICE);
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}
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/* simple syslog write handler */
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static int
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syslog_handler(struct log_stream *ls, struct log_msg *m)
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{
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struct syslog_stream *ss = (struct syslog_stream *) ls;
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int prio;
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ASSERT(ls);
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ASSERT(m);
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prio = syslog_level(LS_GET_LEVEL(m->flags)) | ss->facility;
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syslog(prio, "%s", m->m);
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return 0;
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}
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struct log_stream *
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log_new_syslog(const char *facility, int options)
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{
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int fac = syslog_facility(facility);
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if (fac < 0)
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die("No such syslog facility: %s", facility);
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struct log_stream *ls = log_new_stream(sizeof(struct syslog_stream));
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struct syslog_stream *ss = (struct syslog_stream *) ls;
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ls->name = "syslog";
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ls->msgfmt = 0;
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ls->handler = syslog_handler;
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ls->close = syslog_close;
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ss->facility = fac;
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if (!syslog_open_count++)
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openlog(log_title, options, LOG_INFO);
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return ls;
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}
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int
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log_syslog_facility_exists(const char *facility)
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{
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return (syslog_facility(facility) >= 0);
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}
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