swayfx/common/log.c
Simon Ser 1dbb699036
common/log: write log importance
When colors aren't used, write the log importance to stderr. This makes
it easier to grep for errors and avoids mistaking error messages for
debug messages.

This is [1] ported to Sway.

[1]: https://github.com/swaywm/wlroots/pull/2149
2020-12-10 09:26:02 +01:00

127 lines
2.8 KiB
C

#define _POSIX_C_SOURCE 200112L
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include "log.h"
static terminate_callback_t log_terminate = exit;
void _sway_abort(const char *format, ...) {
va_list args;
va_start(args, format);
_sway_vlog(SWAY_ERROR, format, args);
va_end(args);
log_terminate(EXIT_FAILURE);
}
bool _sway_assert(bool condition, const char *format, ...) {
if (condition) {
return true;
}
va_list args;
va_start(args, format);
_sway_vlog(SWAY_ERROR, format, args);
va_end(args);
#ifndef NDEBUG
raise(SIGABRT);
#endif
return false;
}
static bool colored = true;
static sway_log_importance_t log_importance = SWAY_ERROR;
static struct timespec start_time = {-1, -1};
static const char *verbosity_colors[] = {
[SWAY_SILENT] = "",
[SWAY_ERROR ] = "\x1B[1;31m",
[SWAY_INFO ] = "\x1B[1;34m",
[SWAY_DEBUG ] = "\x1B[1;90m",
};
static const char *verbosity_headers[] = {
[SWAY_SILENT] = "",
[SWAY_ERROR] = "[ERROR]",
[SWAY_INFO] = "[INFO]",
[SWAY_DEBUG] = "[DEBUG]",
};
static void timespec_sub(struct timespec *r, const struct timespec *a,
const struct timespec *b) {
const long NSEC_PER_SEC = 1000000000;
r->tv_sec = a->tv_sec - b->tv_sec;
r->tv_nsec = a->tv_nsec - b->tv_nsec;
if (r->tv_nsec < 0) {
r->tv_sec--;
r->tv_nsec += NSEC_PER_SEC;
}
}
static void init_start_time(void) {
if (start_time.tv_sec >= 0) {
return;
}
clock_gettime(CLOCK_MONOTONIC, &start_time);
}
static void sway_log_stderr(sway_log_importance_t verbosity, const char *fmt,
va_list args) {
init_start_time();
if (verbosity > log_importance) {
return;
}
struct timespec ts = {0};
clock_gettime(CLOCK_MONOTONIC, &ts);
timespec_sub(&ts, &ts, &start_time);
fprintf(stderr, "%02d:%02d:%02d.%03ld ", (int)(ts.tv_sec / 60 / 60),
(int)(ts.tv_sec / 60 % 60), (int)(ts.tv_sec % 60),
ts.tv_nsec / 1000000);
unsigned c = (verbosity < SWAY_LOG_IMPORTANCE_LAST) ? verbosity :
SWAY_LOG_IMPORTANCE_LAST - 1;
if (colored && isatty(STDERR_FILENO)) {
fprintf(stderr, "%s", verbosity_colors[c]);
} else {
fprintf(stderr, "%s ", verbosity_headers[c]);
}
vfprintf(stderr, fmt, args);
if (colored && isatty(STDERR_FILENO)) {
fprintf(stderr, "\x1B[0m");
}
fprintf(stderr, "\n");
}
void sway_log_init(sway_log_importance_t verbosity, terminate_callback_t callback) {
init_start_time();
if (verbosity < SWAY_LOG_IMPORTANCE_LAST) {
log_importance = verbosity;
}
if (callback) {
log_terminate = callback;
}
}
void _sway_vlog(sway_log_importance_t verbosity, const char *fmt, va_list args) {
sway_log_stderr(verbosity, fmt, args);
}
void _sway_log(sway_log_importance_t verbosity, const char *fmt, ...) {
va_list args;
va_start(args, fmt);
sway_log_stderr(verbosity, fmt, args);
va_end(args);
}