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https://github.com/gophernicus/gophernicus.git
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9c0b6a66a4
This commit fixes issue #42 [0]. Debug level messages are masked unless option `-d' (debug) is used. In this case, all messages are also printed to stderr. syslog.h is included in the base POSIX only since issue 6 (POSIX:2001) [1]. `LOG_UPTO' is an extension, not defined by POSIX; an implementation is provided here for platforms where it is missing. This code is inspired by OpenBSD's httpd(8) logging functions [2]. [0] https://github.com/gophernicus/gophernicus/issues/42 [1] https://pubs.opengroup.org/onlinepubs/9699919799/functions/setlogmask.html [2] https://cvsweb.openbsd.org/src/usr.sbin/httpd/log.c?rev=1.14&content-type=text/x-cvsweb-markup
89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
#include <stdarg.h>
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#include <syslog.h>
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#include "gophernicus.h"
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#if defined(LOG_UPTO)
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#define _LOG_UPTO LOG_UPTO
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#else
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#define _LOG_UPTO(pri) \
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( \
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((pri) == LOG_EMERG) ? (LOG_MASK(LOG_EMERG)) : \
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((pri) == LOG_ALERT) ? (LOG_MASK(LOG_EMERG) | LOG_MASK(LOG_ALERT)) : \
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((pri) == LOG_CRIT) ? (LOG_MASK(LOG_EMERG) | LOG_MASK(LOG_ALERT) | LOG_MASK(LOG_CRIT)) : \
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((pri) == LOG_ERR) ? (LOG_MASK(LOG_EMERG) | LOG_MASK(LOG_ALERT) | LOG_MASK(LOG_CRIT) | LOG_MASK(LOG_ERR)) : \
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((pri) == LOG_WARNING) ? (LOG_MASK(LOG_EMERG) | LOG_MASK(LOG_ALERT) | LOG_MASK(LOG_CRIT) | LOG_MASK(LOG_ERR) | LOG_MASK(LOG_WARNING)) : \
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((pri) == LOG_NOTICE) ? (LOG_MASK(LOG_EMERG) | LOG_MASK(LOG_ALERT) | LOG_MASK(LOG_CRIT) | LOG_MASK(LOG_ERR) | LOG_MASK(LOG_WARNING) | LOG_MASK(LOG_NOTICE)) : \
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((pri) == LOG_INFO) ? (LOG_MASK(LOG_EMERG) | LOG_MASK(LOG_ALERT) | LOG_MASK(LOG_CRIT) | LOG_MASK(LOG_ERR) | LOG_MASK(LOG_WARNING) | LOG_MASK(LOG_NOTICE) | LOG_MASK(LOG_INFO)) : \
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((pri) == LOG_DEBUG) ? (LOG_MASK(LOG_EMERG) | LOG_MASK(LOG_ALERT) | LOG_MASK(LOG_CRIT) | LOG_MASK(LOG_ERR) | LOG_MASK(LOG_WARNING) | LOG_MASK(LOG_NOTICE) | LOG_MASK(LOG_INFO) | LOG_MASK(LOG_DEBUG)) : \
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0)
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#endif
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static int _enable = 0;
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void log_init(int enable, int debug)
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{
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if (!enable) return;
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_enable = enable;
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openlog(PROGNAME,
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LOG_PID | (debug ? LOG_PERROR : 0),
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LOG_DAEMON);
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setlogmask(_LOG_UPTO(debug ? LOG_DEBUG : LOG_INFO));
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}
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static void _vlog(int priority, const char *fmt, va_list ap)
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{
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char buf[BUFSIZE];
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if (!_enable) return;
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vsnprintf(buf, sizeof(buf), fmt, ap);
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syslog(priority, "%s", buf);
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}
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static void _log(int priority, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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_vlog(priority, fmt, ap);
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va_end(ap);
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}
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void log_fatal(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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if (errno) {
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int en = errno;
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char buf[BUFSIZE];
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vsnprintf(buf, sizeof(buf), fmt, ap);
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_log(LOG_CRIT, "%s (%s)", buf, strerror(en));
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} else {
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_vlog(LOG_CRIT, fmt, ap);
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}
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va_end(ap);
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}
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#define _GOPHERNICUS_MK_LOG_FUNCTION(FCT_LVL, LOG_LVL) \
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void FCT_LVL(const char *fmt, ...) \
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{ \
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va_list ap; \
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\
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va_start(ap, fmt); \
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_vlog(LOG_LVL, fmt, ap); \
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va_end(ap); \
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}
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_GOPHERNICUS_MK_LOG_FUNCTION(log_warning, LOG_WARNING)
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_GOPHERNICUS_MK_LOG_FUNCTION(log_info, LOG_INFO)
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_GOPHERNICUS_MK_LOG_FUNCTION(log_debug, LOG_DEBUG)
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#undef _GOPHERNICUS_MK_LOG_FUNCTION
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