forked from external/yambar
Eventually, this should probably be made configurable, and/or possible to control through command line options.
144 lines
3.7 KiB
C
144 lines
3.7 KiB
C
#include "log.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <assert.h>
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#include <syslog.h>
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static void __attribute__((constructor))
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init(void)
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{
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openlog(NULL, /*LOG_PID*/0, LOG_USER);
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setlogmask(LOG_UPTO(LOG_WARNING));
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}
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static void __attribute__((destructor))
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fini(void)
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{
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closelog();
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}
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static void
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_log(enum log_class log_class, const char *module, const char *file, int lineno,
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const char *fmt, int sys_errno, va_list va)
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{
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bool colorize = true;
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const char *class = "abcd";
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int class_clr = 0;
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switch (log_class) {
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case LOG_CLASS_ERROR: class = " err"; class_clr = 31; break;
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case LOG_CLASS_WARNING: class = "warn"; class_clr = 33; break;
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case LOG_CLASS_INFO: class = "info"; class_clr = 97; break;
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case LOG_CLASS_DEBUG: class = " dbg"; class_clr = 36; break;
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}
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char clr[16];
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snprintf(clr, sizeof(clr), "\e[%dm", class_clr);
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printf("%s%s%s: ", colorize ? clr : "", class, colorize ? "\e[0m" : "");
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if (colorize)
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printf("\e[2m");
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#if defined(_DEBUG)
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printf("%s:%d: ", file, lineno);
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#else
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printf("%s: ", module);
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#endif
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if (colorize)
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printf("\e[0m");
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vprintf(fmt, va);
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if (sys_errno != 0)
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printf(": %s", strerror(sys_errno));
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printf("\n");
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}
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static void
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_sys_log(enum log_class log_class, const char *module, const char *file,
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int lineno, const char *fmt, int sys_errno, va_list va)
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{
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/* Map our log level to syslog's level */
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int level = -1;
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switch (log_class) {
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case LOG_CLASS_ERROR: level = LOG_ERR; break;
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case LOG_CLASS_WARNING: level = LOG_WARNING; break;
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case LOG_CLASS_INFO: level = LOG_INFO; break;
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case LOG_CLASS_DEBUG: level = LOG_DEBUG; break;
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}
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assert(level != -1);
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const char *sys_err = sys_errno != 0 ? strerror(sys_errno) : NULL;
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va_list va2;
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va_copy(va2, va);
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/* Calculate required size of buffer holding the entire log message */
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int required_len = 0;
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required_len += strlen(module) + 2; /* "%s: " */
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required_len += vsnprintf(NULL, 0, fmt, va2); va_end(va2);
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if (sys_errno != 0)
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required_len += strlen(sys_err) + 2; /* ": %s" */
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/* Format the msg */
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char *msg = malloc(required_len + 1);
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int idx = 0;
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idx += snprintf(&msg[idx], required_len + 1 - idx, "%s: ", module);
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idx += vsnprintf(&msg[idx], required_len + 1 - idx, fmt, va);
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if (sys_errno != 0) {
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idx += snprintf(
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&msg[idx], required_len + 1 - idx, ": %s", strerror(sys_errno));
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}
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syslog(level, "%s", msg);
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free(msg);
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}
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void
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log_msg(enum log_class log_class, const char *module,
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const char *file, int lineno, const char *fmt, ...)
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{
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va_list ap1, ap2;
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va_start(ap1, fmt);
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va_copy(ap2, ap1);
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_log(log_class, module, file, lineno, fmt, 0, ap1);
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_sys_log(log_class, module, file, lineno, fmt, 0, ap2);
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va_end(ap1);
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va_end(ap2);
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}
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void log_errno(enum log_class log_class, const char *module,
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const char *file, int lineno,
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const char *fmt, ...)
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{
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va_list ap1, ap2;
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va_start(ap1, fmt);
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va_copy(ap2, ap1);
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_log(log_class, module, file, lineno, fmt, errno, ap1);
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_sys_log(log_class, module, file, lineno, fmt, errno, ap2);
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va_end(ap1);
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va_end(ap2);
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}
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void log_errno_provided(enum log_class log_class, const char *module,
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const char *file, int lineno, int _errno,
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const char *fmt, ...)
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{
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va_list ap1, ap2;
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va_start(ap1, fmt);
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va_copy(ap2, ap1);
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_log(log_class, module, file, lineno, fmt, _errno, ap1);
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_sys_log(log_class, module, file, lineno, fmt, _errno, ap2);
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va_end(ap1);
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va_end(ap2);
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}
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