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Merge branch 'log-level'

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Closes #84
This commit is contained in:
Daniel Eklöf 2021-08-15 16:45:02 +02:00
commit b00954045b
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9 changed files with 229 additions and 128 deletions
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2
CHANGELOG.md
View file

@ -18,6 +18,8 @@
four borders to the same value
(https://codeberg.org/dnkl/yambar/issues/77).
* river: `per-output: false|true`.
* `-d,--log-level=info|warning|error|none` command line option
(https://codeberg.org/dnkl/yambar/issues/84).
### Changed

1
completions/zsh/_yambar
View file

@ -8,5 +8,6 @@ _arguments \
'(-c --config)'{-c,--config}'[alternative configuration file]:filename:_files' \
'(-C --validate)'{-C,--validate}'[verify configuration then quit]' \
'(-p --print-pid)'{-p,--print-pid}'[print PID to this file or FD when up and running]:pidfile:_files' \
'(-d --log-level)'{-d,--log-level}'[log level (info)]:loglevel:(info warning error none)' \
'(-l --log-colorize)'{-l,--log-colorize}'[enable or disable colorization of log output on stderr]:logcolor:(never always auto)' \
'(-s --log-no-syslog)'{-s,--log-no-syslog}'[disable syslog logging]'

4
doc/yambar.1.scd
View file

@ -27,6 +27,10 @@ yambar - modular status panel for X11 and Wayland
(or FD) is closed immediately after writing the PID. When a _FILE_
as been specified, the file is unlinked exit.
*-d*,*--log-level*={*info*,*warning*,*error*,*none*}
Log level, used both for log output on stderr as well as
syslog. Default: _info_.
*-l*,*--log-colorize*=[{*never*,*always*,*auto*}]
Enables or disables colorization of log output on stderr.

235
log.c
View file

@ -1,41 +1,53 @@
#include "log.h"
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <stdbool.h>
#include <errno.h>
#include <assert.h>
#include <unistd.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <assert.h>
#define ALEN(v) (sizeof(v) / sizeof((v)[0]))
#define UNUSED __attribute__((unused))
static bool colorize = false;
static bool do_syslog = true;
static enum log_class log_level = LOG_CLASS_NONE;
static const struct {
const char name[8];
const char log_prefix[7];
uint8_t color;
int syslog_equivalent;
} log_level_map[] = {
[LOG_CLASS_NONE] = {"none", "none", 5, -1},
[LOG_CLASS_ERROR] = {"error", " err", 31, LOG_ERR},
[LOG_CLASS_WARNING] = {"warning", "warn", 33, LOG_WARNING},
[LOG_CLASS_INFO] = {"info", "info", 97, LOG_INFO},
[LOG_CLASS_DEBUG] = {"debug", " dbg", 36, LOG_DEBUG},
};
void
log_init(enum log_colorize _colorize, bool _do_syslog,
enum log_facility syslog_facility, enum log_class syslog_level)
enum log_facility syslog_facility, enum log_class _log_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);
do_syslog = _do_syslog;
log_level = _log_level;
if (do_syslog) {
int slvl = log_level_map[_log_level].syslog_equivalent;
if (do_syslog && slvl != -1) {
openlog(NULL, /*LOG_PID*/0, facility_map[syslog_facility]);
setlogmask(LOG_UPTO(level_map[syslog_level]));
setlogmask(LOG_UPTO(slvl));
}
}
@ -50,117 +62,156 @@ static void
_log(enum log_class log_class, const char *module, const char *file, int lineno,
const char *fmt, int sys_errno, va_list va)
{
const char *class = "abcd";
int class_clr = 0;
switch (log_class) {
case LOG_CLASS_ERROR: class = " err"; class_clr = 31; break;
case LOG_CLASS_WARNING: class = "warn"; class_clr = 33; break;
case LOG_CLASS_INFO: class = "info"; class_clr = 97; break;
case LOG_CLASS_DEBUG: class = " dbg"; class_clr = 36; break;
}
assert(log_class > LOG_CLASS_NONE);
assert(log_class < ALEN(log_level_map));
if (log_class > log_level)
return;
const char *prefix = log_level_map[log_class].log_prefix;
unsigned int class_clr = log_level_map[log_class].color;
char clr[16];
snprintf(clr, sizeof(clr), "\e[%dm", class_clr);
fprintf(stderr, "%s%s%s: ", colorize ? clr : "", class, colorize ? "\e[0m" : "");
snprintf(clr, sizeof(clr), "\033[%um", class_clr);
fprintf(stderr, "%s%s%s: ", colorize ? clr : "", prefix, colorize ? "\033[0m" : "");
if (colorize)
fprintf(stderr, "\e[2m");
fputs("\033[2m", stderr);
fprintf(stderr, "%s:%d: ", file, lineno);
if (colorize)
fprintf(stderr, "\e[0m");
fputs("\033[0m", stderr);
vfprintf(stderr, fmt, va);
if (sys_errno != 0)
fprintf(stderr, ": %s", strerror(sys_errno));
fprintf(stderr, "\n");
fputc('\n', stderr);
}
static void
_sys_log(enum log_class log_class, const char *module,
const char *file __attribute__((unused)),
int lineno __attribute__((unused)),
const char UNUSED *file, int UNUSED lineno,
const char *fmt, int sys_errno, va_list va)
{
assert(log_class > LOG_CLASS_NONE);
assert(log_class < ALEN(log_level_map));
if (!do_syslog)
return;
/* Map our log level to syslog's level */
int level = -1;
switch (log_class) {
case LOG_CLASS_ERROR: level = LOG_ERR; break;
case LOG_CLASS_WARNING: level = LOG_WARNING; break;
case LOG_CLASS_INFO: level = LOG_INFO; break;
case LOG_CLASS_DEBUG: level = LOG_DEBUG; break;
}
int level = log_level_map[log_class].syslog_equivalent;
assert(level != -1);
char msg[4096];
int n = vsnprintf(msg, sizeof(msg), fmt, va);
assert(n >= 0);
const char *sys_err = sys_errno != 0 ? strerror(sys_errno) : NULL;
if (sys_errno != 0 && (size_t)n < sizeof(msg))
snprintf(msg + n, sizeof(msg) - n, ": %s", strerror(sys_errno));
syslog(level, "%s: %s", module, msg);
}
void
log_msg_va(enum log_class log_class, const char *module,
const char *file, int lineno, const char *fmt, va_list va)
{
va_list va2;
va_copy(va2, va);
/* Calculate required size of buffer holding the entire log message */
int required_len = 0;
required_len += strlen(module) + 2; /* "%s: " */
required_len += vsnprintf(NULL, 0, fmt, va2); va_end(va2);
if (sys_errno != 0)
required_len += strlen(sys_err) + 2; /* ": %s" */
/* Format the msg */
char *msg = malloc(required_len + 1);
int idx = 0;
idx += snprintf(&msg[idx], required_len + 1 - idx, "%s: ", module);
idx += vsnprintf(&msg[idx], required_len + 1 - idx, fmt, va);
if (sys_errno != 0) {
snprintf(
&msg[idx], required_len + 1 - idx, ": %s", strerror(sys_errno));
}
syslog(level, "%s", msg);
free(msg);
_log(log_class, module, file, lineno, fmt, 0, va);
_sys_log(log_class, module, file, lineno, fmt, 0, va2);
va_end(va2);
}
void
log_msg(enum log_class log_class, const char *module,
const char *file, int lineno, const char *fmt, ...)
{
va_list ap1, ap2;
va_start(ap1, fmt);
va_copy(ap2, ap1);
_log(log_class, module, file, lineno, fmt, 0, ap1);
_sys_log(log_class, module, file, lineno, fmt, 0, ap2);
va_end(ap1);
va_end(ap2);
va_list va;
va_start(va, fmt);
log_msg_va(log_class, module, file, lineno, fmt, va);
va_end(va);
}
void log_errno(enum log_class log_class, const char *module,
const char *file, int lineno,
const char *fmt, ...)
void
log_errno_va(enum log_class log_class, const char *module,
const char *file, int lineno,
const char *fmt, va_list va)
{
va_list ap1, ap2;
va_start(ap1, fmt);
va_copy(ap2, ap1);
_log(log_class, module, file, lineno, fmt, errno, ap1);
_sys_log(log_class, module, file, lineno, fmt, errno, ap2);
va_end(ap1);
va_end(ap2);
log_errno_provided_va(log_class, module, file, lineno, errno, fmt, va);
}
void log_errno_provided(enum log_class log_class, const char *module,
const char *file, int lineno, int _errno,
const char *fmt, ...)
void
log_errno(enum log_class log_class, const char *module,
const char *file, int lineno,
const char *fmt, ...)
{
va_list ap1, ap2;
va_start(ap1, fmt);
va_copy(ap2, ap1);
_log(log_class, module, file, lineno, fmt, _errno, ap1);
_sys_log(log_class, module, file, lineno, fmt, _errno, ap2);
va_end(ap1);
va_end(ap2);
va_list va;
va_start(va, fmt);
log_errno_va(log_class, module, file, lineno, fmt, va);
va_end(va);
}
void
log_errno_provided_va(enum log_class log_class, const char *module,
const char *file, int lineno, int errno_copy,
const char *fmt, va_list va)
{
va_list va2;
va_copy(va2, va);
_log(log_class, module, file, lineno, fmt, errno_copy, va);
_sys_log(log_class, module, file, lineno, fmt, errno_copy, va2);
va_end(va2);
}
void
log_errno_provided(enum log_class log_class, const char *module,
const char *file, int lineno, int errno_copy,
const char *fmt, ...)
{
va_list va;
va_start(va, fmt);
log_errno_provided_va(log_class, module, file, lineno, errno_copy, fmt, va);
va_end(va);
}
static size_t
map_len(void)
{
size_t len = ALEN(log_level_map);
#ifndef _DEBUG
/* Exclude "debug" entry for non-debug builds */
len--;
#endif
return len;
}
int
log_level_from_string(const char *str)
{
if (str[0] == '\0')
return -1;
for (int i = 0, n = map_len(); i < n; i++)
if (strcmp(str, log_level_map[i].name) == 0)
return i;
return -1;
}
const char *
log_level_string_hint(void)
{
static char buf[64];
if (buf[0] != '\0')
return buf;
for (size_t i = 0, pos = 0, n = map_len(); i < n; i++) {
const char *entry = log_level_map[i].name;
const char *delim = (i + 1 < n) ? ", " : "";
pos += snprintf(buf + pos, sizeof(buf) - pos, "'%s'%s", entry, delim);
}
return buf;
}

68
log.h
View file

@ -1,42 +1,68 @@
#pragma once
#include <stdbool.h>
#include <stdarg.h>
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_NONE,
LOG_CLASS_ERROR,
LOG_CLASS_WARNING,
LOG_CLASS_INFO,
LOG_CLASS_DEBUG
};
void log_init(enum log_colorize colorize, bool do_syslog,
enum log_facility syslog_facility, enum log_class syslog_level);
enum log_facility syslog_facility, enum log_class log_level);
void log_deinit(void);
void log_msg(enum log_class log_class, const char *module,
const char *file, int lineno,
const char *fmt, ...) __attribute__((format (printf, 5, 6)));
void log_msg(
enum log_class log_class, const char *module,
const char *file, int lineno,
const char *fmt, ...) __attribute__((format (printf, 5, 6)));
void log_errno(enum log_class log_class, const char *module,
const char *file, int lineno,
const char *fmt, ...) __attribute__((format (printf, 5, 6)));
void log_errno(
enum log_class log_class, const char *module,
const char *file, int lineno,
const char *fmt, ...) __attribute__((format (printf, 5, 6)));
void log_errno_provided(
enum log_class log_class, const char *module,
const char *file, int lineno, int _errno,
const char *fmt, ...) __attribute__((format (printf, 6, 7)));
#define LOG_ERR(fmt, ...) \
log_msg(LOG_CLASS_ERROR, LOG_MODULE, __FILE__, __LINE__, fmt, ## __VA_ARGS__)
#define LOG_ERRNO(fmt, ...) \
log_errno(LOG_CLASS_ERROR, LOG_MODULE, __FILE__, __LINE__, fmt, ## __VA_ARGS__)
#define LOG_ERRNO_P(fmt, _errno, ...) \
void log_msg_va(
enum log_class log_class, const char *module,
const char *file, int lineno, const char *fmt, va_list va) __attribute__((format (printf, 5, 0)));
void log_errno_va(
enum log_class log_class, const char *module,
const char *file, int lineno,
const char *fmt, va_list va) __attribute__((format (printf, 5, 0)));
void log_errno_provided_va(
enum log_class log_class, const char *module,
const char *file, int lineno, int _errno,
const char *fmt, va_list va) __attribute__((format (printf, 6, 0)));
int log_level_from_string(const char *str);
const char *log_level_string_hint(void);
#define LOG_ERR(...) \
log_msg(LOG_CLASS_ERROR, LOG_MODULE, __FILE__, __LINE__, __VA_ARGS__)
#define LOG_ERRNO(...) \
log_errno(LOG_CLASS_ERROR, LOG_MODULE, __FILE__, __LINE__, __VA_ARGS__)
#define LOG_ERRNO_P(_errno, ...) \
log_errno_provided(LOG_CLASS_ERROR, LOG_MODULE, __FILE__, __LINE__, \
_errno, fmt, ## __VA_ARGS__)
#define LOG_WARN(fmt, ...) \
log_msg(LOG_CLASS_WARNING, LOG_MODULE, __FILE__, __LINE__, fmt, ## __VA_ARGS__)
#define LOG_INFO(fmt, ...) \
log_msg(LOG_CLASS_INFO, LOG_MODULE, __FILE__, __LINE__, fmt, ## __VA_ARGS__)
_errno, __VA_ARGS__)
#define LOG_WARN(...) \
log_msg(LOG_CLASS_WARNING, LOG_MODULE, __FILE__, __LINE__, __VA_ARGS__)
#define LOG_INFO(...) \
log_msg(LOG_CLASS_INFO, LOG_MODULE, __FILE__, __LINE__, __VA_ARGS__)
#if defined(LOG_ENABLE_DBG) && LOG_ENABLE_DBG
#define LOG_DBG(fmt, ...) \
log_msg(LOG_CLASS_DEBUG, LOG_MODULE, __FILE__, __LINE__, fmt, ## __VA_ARGS__)
#define LOG_DBG(...) \
log_msg(LOG_CLASS_DEBUG, LOG_MODULE, __FILE__, __LINE__, __VA_ARGS__)
#else
#define LOG_DBG(fmt, ...)
#define LOG_DBG(...)
#endif

41
main.c
View file

@ -127,13 +127,14 @@ print_usage(const char *prog_name)
printf("Usage: %s [OPTION]...\n", prog_name);
printf("\n");
printf("Options:\n");
printf(" -b,--backend={xcb,wayland,auto} backend to use (default: auto)\n"
" -c,--config=FILE alternative configuration file\n"
" -C,--validate verify configuration then quit\n"
" -p,--print-pid=FILE|FD print PID to file or FD\n"
" -l,--log-colorize=[never|always|auto] enable/disable colorization of log output on stderr\n"
" -s,--log-no-syslog disable syslog logging\n"
" -v,--version show the version number and quit\n");
printf(" -b,--backend={xcb,wayland,auto} backend to use (default: auto)\n"
" -c,--config=FILE alternative configuration file\n"
" -C,--validate verify configuration then quit\n"
" -p,--print-pid=FILE|FD print PID to file or FD\n"
" -d,--log-level={info|warning|error|none} log level (info)\n"
" -l,--log-colorize=[never|always|auto] enable/disable colorization of log output on stderr\n"
" -s,--log-no-syslog disable syslog logging\n"
" -v,--version show the version number and quit\n");
}
static bool
@ -181,6 +182,7 @@ main(int argc, char *const *argv)
{"config", required_argument, 0, 'c'},
{"validate", no_argument, 0, 'C'},
{"print-pid", required_argument, 0, 'p'},
{"log-level", required_argument, 0, 'd'},
{"log-colorize", optional_argument, 0, 'l'},
{"log-no-syslog", no_argument, 0, 's'},
{"version", no_argument, 0, 'v'},
@ -195,11 +197,12 @@ main(int argc, char *const *argv)
char *config_path = NULL;
enum bar_backend backend = BAR_BACKEND_AUTO;
enum log_class log_level = LOG_CLASS_INFO;
enum log_colorize log_colorize = LOG_COLORIZE_AUTO;
bool log_syslog = true;
while (true) {
int c = getopt_long(argc, argv, ":b:c:Cp:l::svh", longopts, NULL);
int c = getopt_long(argc, argv, ":b:c:Cp:d:l::svh", longopts, NULL);
if (c == -1)
break;
@ -238,6 +241,20 @@ main(int argc, char *const *argv)
pid_file = optarg;
break;
case 'd': {
int lvl = log_level_from_string(optarg);
if (lvl < 0) {
fprintf(
stderr,
"-d,--log-level: %s: argument must be one of %s\n",
optarg,
log_level_string_hint());
return EXIT_FAILURE;
}
log_level = lvl;
break;
}
case 'l':
if (optarg == NULL || strcmp(optarg, "auto") == 0)
log_colorize = LOG_COLORIZE_AUTO;
@ -273,14 +290,14 @@ main(int argc, char *const *argv)
}
}
log_init(log_colorize, log_syslog, LOG_FACILITY_DAEMON, LOG_CLASS_INFO);
log_init(log_colorize, log_syslog, LOG_FACILITY_DAEMON, log_level);
_Static_assert(LOG_CLASS_ERROR + 1 == FCFT_LOG_CLASS_ERROR,
_Static_assert((int)LOG_CLASS_ERROR == (int)FCFT_LOG_CLASS_ERROR,
"fcft log level enum offset");
_Static_assert((int)LOG_COLORIZE_ALWAYS == (int)FCFT_LOG_COLORIZE_ALWAYS,
"fcft colorize enum mismatch");
fcft_log_init(
(enum fcft_log_colorize)log_colorize, log_syslog, FCFT_LOG_CLASS_INFO);
(enum fcft_log_colorize)log_colorize, log_syslog, (enum fcft_log_class)log_level);
const struct sigaction sa = {.sa_handler = &signal_handler};
sigaction(SIGINT, &sa, NULL);
@ -367,7 +384,7 @@ done:
int res;
int r = thrd_join(bar_thread, &res);
if (r != 0)
LOG_ERRNO_P("failed to join bar thread", r);
LOG_ERRNO_P(r, "failed to join bar thread");
bar->destroy(bar);
close(abort_fd);

2
modules/network.c
View file

@ -451,7 +451,7 @@ parse_reply(struct module *mod, const struct nlmsghdr *hdr, size_t len)
case NLMSG_ERROR:{
const struct nlmsgerr *err = NLMSG_DATA(hdr);
LOG_ERRNO_P("netlink", err->error);
LOG_ERRNO_P(err->error, "netlink");
return false;
}

2
modules/script.c
View file

@ -495,7 +495,7 @@ execute_script(struct module *mod)
}
if (r > 0) {
LOG_ERRNO_P("%s: failed to start", _errno, m->path);
LOG_ERRNO_P(_errno, "%s: failed to start", m->path);
close(comm_pipe[0]);
waitpid(pid, NULL, 0);
return -1;

2
particle.c
View file

@ -203,7 +203,7 @@ exposable_default_on_mouse(struct exposable *exposable, struct bar *bar,
if (WIFEXITED(wstatus)) {
if (WEXITSTATUS(wstatus) != 0)
LOG_ERRNO_P("%s: failed to execute", WEXITSTATUS(wstatus), exposable->on_click[btn]);
LOG_ERRNO_P(WEXITSTATUS(wstatus), "%s: failed to execute", exposable->on_click[btn]);
} else
LOG_ERR("%s: did not exit normally", exposable->on_click[btn]);