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d29aa12117
additional payload (to reduce problems with lifetime of objects) and are delivered to one or more event sinks. This is more powerful and reduces the complex dependencies between control mode and hooks. Events are now used for hooks, control mode notifications and for monitors (set-hook -B). wait-for can now wait for an event to fire (-E flag, with -F to for filter), with -v to print the payload, as well as listing (-l) waiting clients on an event and forcing one to wake (-w). A few additional hooks are also now available (pane-created, pane-resized, etc) and some of the existing ones have additional format variables available.
168 lines
3.1 KiB
C
168 lines
3.1 KiB
C
/* $OpenBSD: log.c,v 1.33 2026/05/17 16:02:33 nicm Exp $ */
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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 <vis.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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