mirror of
https://github.com/tmate-io/tmate-ssh-server.git
synced 2020-11-18 19:53:51 -08:00
168 lines
3.3 KiB
C
168 lines
3.3 KiB
C
/* $Id$ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <time.h>
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#include <unistd.h>
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#include "tmux.h"
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#include "tmate.h"
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FILE *log_file;
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struct logging_settings {
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const char *program_name;
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bool use_syslog;
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int log_level;
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};
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static struct logging_settings log_settings;
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static void log_event_cb(int, const char *);
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static void log_vwrite(int, const char *, va_list);
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static void
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log_event_cb(__unused int severity, const char *msg)
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{
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log_debug("%s", msg);
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}
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/* Increment log level. */
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void
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log_add_level(void)
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{
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log_settings.log_level++;
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}
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/* Get log level. */
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int
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log_get_level(void)
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{
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return (log_settings.log_level);
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}
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void init_logging(const char *program_name, bool use_syslog, int log_level)
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{
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log_settings.log_level = log_level;
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log_settings.use_syslog = use_syslog;
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log_settings.program_name = xstrdup(program_name);
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if (use_syslog) {
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openlog(program_name, LOG_CONS | LOG_PID, LOG_USER);
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setlogmask(LOG_UPTO(log_level));
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} else {
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log_file = fdopen(dup(STDERR_FILENO), "a");
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if (!log_file)
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exit(1);
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}
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event_set_log_callback(log_event_cb);
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}
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/* Write a log message. */
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static void
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log_vwrite(int level, const char *msg, va_list ap)
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{
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char *fmt = NULL;
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const char *token = tmate_session->session_token;
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if (log_settings.log_level < level)
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return;
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if (token) {
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if (asprintf(&fmt, "[%s] %s", token, msg) < 0)
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exit(1);
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msg = fmt;
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}
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if (log_settings.use_syslog) {
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vsyslog(level, msg, ap);
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} else {
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fprintf(log_file, "<%d> ", level);
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vfprintf(log_file, msg, ap);
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fprintf(log_file, "\n");
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fflush(log_file);
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}
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free(fmt);
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}
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/* Log a debug message. */
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void
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log_debug(const char *msg, ...)
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{
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va_list ap;
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va_start(ap, msg);
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log_vwrite(LOG_DEBUG, msg, ap);
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va_end(ap);
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}
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/* Log a critical error with error string and die. */
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__dead void
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fatal(const char *msg, ...)
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{
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char *fmt;
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va_list ap;
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va_start(ap, msg);
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if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1)
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exit(1);
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log_vwrite(LOG_CRIT, fmt, ap);
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exit(1);
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}
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/* Log a critical error and die. */
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__dead void
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fatalx(const char *msg, ...)
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{
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char *fmt;
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va_list ap;
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va_start(ap, msg);
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if (asprintf(&fmt, "fatal: %s", msg) == -1)
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exit(1);
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log_vwrite(LOG_CRIT, fmt, ap);
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exit(1);
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}
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void tmate_log(int level, const char *msg, ...)
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{
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char *fmt;
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va_list ap;
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if (log_settings.log_level < level)
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return;
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va_start(ap, msg);
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if (asprintf(&fmt, "(tmate) %s", msg) < 0)
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exit(1);
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log_vwrite(level, fmt, ap);
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va_end(ap);
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free(fmt);
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}
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