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log: make syslog facility and level configurable, always log filename+lineno

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Daniel Eklöf 2020-02-20 19:49:27 +01:00
parent df1a004f97
commit 0794b453dd
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GPG key ID: 5BBD4992C116573F
3 changed files with 26 additions and 15 deletions
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34
log.c
View file

@ -15,14 +15,27 @@ static bool colorize = false;
static bool do_syslog = true; static bool do_syslog = true;
void void
log_init(enum log_colorize _colorize, bool _do_syslog) log_init(enum log_colorize _colorize, bool _do_syslog,
enum log_facility syslog_facility, enum log_class syslog_level)
{ {
static const int facility_map[] = {
[LOG_FACILITY_USER] = LOG_USER,
[LOG_FACILITY_DAEMON] = LOG_DAEMON,
};
static const int level_map[] = {
[LOG_CLASS_ERROR] = LOG_ERR,
[LOG_CLASS_WARNING] = LOG_WARNING,
[LOG_CLASS_INFO] = LOG_INFO,
[LOG_CLASS_DEBUG] = LOG_DEBUG,
};
colorize = _colorize == LOG_COLORIZE_NEVER ? false : _colorize == LOG_COLORIZE_ALWAYS ? true : isatty(STDERR_FILENO); colorize = _colorize == LOG_COLORIZE_NEVER ? false : _colorize == LOG_COLORIZE_ALWAYS ? true : isatty(STDERR_FILENO);
do_syslog = _do_syslog; do_syslog = _do_syslog;
if (do_syslog) { if (do_syslog) {
openlog(NULL, /*LOG_PID*/0, LOG_USER); openlog(NULL, /*LOG_PID*/0, facility_map[syslog_facility]);
setlogmask(LOG_UPTO(LOG_WARNING)); setlogmask(LOG_UPTO(level_map[syslog_level]));
} }
} }
@ -52,11 +65,7 @@ _log(enum log_class log_class, const char *module, const char *file, int lineno,
if (colorize) if (colorize)
fprintf(stderr, "\e[2m"); fprintf(stderr, "\e[2m");
#if defined(_DEBUG)
fprintf(stderr, "%s:%d: ", file, lineno); fprintf(stderr, "%s:%d: ", file, lineno);
#else
fprintf(stderr, "%s: ", module);
#endif
if (colorize) if (colorize)
fprintf(stderr, "\e[0m"); fprintf(stderr, "\e[0m");
@ -69,8 +78,10 @@ _log(enum log_class log_class, const char *module, const char *file, int lineno,
} }
static void static void
_sys_log(enum log_class log_class, const char *module, const char *file, _sys_log(enum log_class log_class, const char *module,
int lineno, const char *fmt, int sys_errno, va_list va) const char *file __attribute__((unused)),
int lineno __attribute__((unused)),
const char *fmt, int sys_errno, va_list va)
{ {
if (!do_syslog) if (!do_syslog)
return; return;
@ -94,8 +105,7 @@ _sys_log(enum log_class log_class, const char *module, const char *file,
/* Calculate required size of buffer holding the entire log message */ /* Calculate required size of buffer holding the entire log message */
int required_len = 0; int required_len = 0;
required_len += strlen(module) + 2; /* "%s: " */ required_len += strlen(module) + 2; /* "%s: " */
required_len += vsnprintf(NULL, 0, fmt, va2); required_len += vsnprintf(NULL, 0, fmt, va2); va_end(va2);
va_end(va2);
if (sys_errno != 0) if (sys_errno != 0)
required_len += strlen(sys_err) + 2; /* ": %s" */ required_len += strlen(sys_err) + 2; /* ": %s" */
@ -108,7 +118,7 @@ _sys_log(enum log_class log_class, const char *module, const char *file,
idx += vsnprintf(&msg[idx], required_len + 1 - idx, fmt, va); idx += vsnprintf(&msg[idx], required_len + 1 - idx, fmt, va);
if (sys_errno != 0) { if (sys_errno != 0) {
idx += snprintf( snprintf(
&msg[idx], required_len + 1 - idx, ": %s", strerror(sys_errno)); &msg[idx], required_len + 1 - idx, ": %s", strerror(sys_errno));
} }

5
log.h
View file

@ -1,11 +1,12 @@
#pragma once #pragma once
#include <stdbool.h> #include <stdbool.h>
enum log_colorize { LOG_COLORIZE_NEVER, LOG_COLORIZE_ALWAYS, LOG_COLORIZE_AUTO }; enum log_colorize { LOG_COLORIZE_NEVER, LOG_COLORIZE_ALWAYS, LOG_COLORIZE_AUTO };
enum log_facility { LOG_FACILITY_USER, LOG_FACILITY_DAEMON };
enum log_class { LOG_CLASS_ERROR, LOG_CLASS_WARNING, LOG_CLASS_INFO, LOG_CLASS_DEBUG }; enum log_class { LOG_CLASS_ERROR, LOG_CLASS_WARNING, LOG_CLASS_INFO, LOG_CLASS_DEBUG };
void log_init(enum log_colorize colorize, bool do_syslog); void log_init(enum log_colorize colorize, bool do_syslog,
enum log_facility syslog_facility, enum log_class syslog_level);
void log_deinit(void); void log_deinit(void);
void log_msg(enum log_class log_class, const char *module, void log_msg(enum log_class log_class, const char *module,

2
main.c
View file

@ -275,7 +275,7 @@ main(int argc, char *const *argv)
} }
} }
log_init(log_colorize, log_syslog); log_init(log_colorize, log_syslog, LOG_FACILITY_USER, LOG_CLASS_WARNING);
const struct sigaction sa = {.sa_handler = &signal_handler}; const struct sigaction sa = {.sa_handler = &signal_handler};
sigaction(SIGINT, &sa, NULL); sigaction(SIGINT, &sa, NULL);