mirror of
https://github.com/tmux/tmux.git
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167 lines
3.0 KiB
C
167 lines
3.0 KiB
C
/* $OpenBSD$ */
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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 <unistd.h>
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#include "tmux.h"
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static FILE *log_file;
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static int log_level;
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/* Log callback for libevent. */
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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_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_level);
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}
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/* Open logging to file. */
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void
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log_open(const char *name)
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{
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char *path;
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if (log_level == 0)
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return;
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log_close();
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xasprintf(&path, "tmux-%s-%ld.log", name, (long)getpid());
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log_file = fopen(path, "a");
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free(path);
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if (log_file == NULL)
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return;
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setvbuf(log_file, NULL, _IOLBF, 0);
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event_set_log_callback(log_event_cb);
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}
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/* Toggle logging. */
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void
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log_toggle(const char *name)
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{
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if (log_level == 0) {
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log_level = 1;
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log_open(name);
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log_debug("log opened");
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} else {
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log_debug("log closed");
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log_level = 0;
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log_close();
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}
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}
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/* Close logging. */
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void
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log_close(void)
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{
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if (log_file != NULL)
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fclose(log_file);
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log_file = NULL;
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event_set_log_callback(NULL);
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}
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/* Write a log message. */
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static void printflike(1, 0)
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log_vwrite(const char *msg, va_list ap, const char *prefix)
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{
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char *s, *out;
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struct timeval tv;
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if (log_file == NULL)
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return;
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if (vasprintf(&s, msg, ap) == -1)
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return;
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if (stravis(&out, s, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL) == -1) {
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free(s);
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return;
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}
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free(s);
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gettimeofday(&tv, NULL);
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if (fprintf(log_file, "%lld.%06d %s%s\n", (long long)tv.tv_sec,
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(int)tv.tv_usec, prefix, out) != -1)
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fflush(log_file);
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free(out);
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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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if (log_file == NULL)
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return;
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va_start(ap, msg);
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log_vwrite(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 tmp[256];
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va_list ap;
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if (snprintf(tmp, sizeof tmp, "fatal: %s: ", strerror(errno)) < 0)
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exit(1);
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va_start(ap, msg);
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log_vwrite(msg, ap, tmp);
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va_end(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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va_list ap;
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va_start(ap, msg);
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log_vwrite(msg, ap, "fatal: ");
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va_end(ap);
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exit(1);
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}
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