1/* $OpenBSD$ */ 2 3/* 4 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19#include <sys/types.h> 20 21#include <errno.h> 22#include <stdio.h> 23#include <stdlib.h> 24#include <string.h> 25#include <unistd.h> 26 27#include "tmux.h" 28 29static FILE *log_file; 30static int log_level; 31 32/* Log callback for libevent. */ 33static void 34log_event_cb(__unused int severity, const char *msg) 35{ 36 log_debug("%s", msg); 37} 38 39/* Increment log level. */ 40void 41log_add_level(void) 42{ 43 log_level++; 44} 45 46/* Get log level. */ 47int 48log_get_level(void) 49{ 50 return (log_level); 51} 52 53/* Open logging to file. */ 54void 55log_open(const char *name) 56{ 57 char *path; 58 59 if (log_level == 0) 60 return; 61 log_close(); 62 63 xasprintf(&path, "tmux-%s-%ld.log", name, (long)getpid()); 64 log_file = fopen(path, "a"); 65 free(path); 66 if (log_file == NULL) 67 return; 68 69 setvbuf(log_file, NULL, _IOLBF, 0); 70 event_set_log_callback(log_event_cb); 71} 72 73/* Toggle logging. */ 74void 75log_toggle(const char *name) 76{ 77 if (log_level == 0) { 78 log_level = 1; 79 log_open(name); 80 log_debug("log opened"); 81 } else { 82 log_debug("log closed"); 83 log_level = 0; 84 log_close(); 85 } 86} 87 88/* Close logging. */ 89void 90log_close(void) 91{ 92 if (log_file != NULL) 93 fclose(log_file); 94 log_file = NULL; 95 96 event_set_log_callback(NULL); 97} 98 99/* Write a log message. */ 100static void printflike(1, 0) 101log_vwrite(const char *msg, va_list ap, const char *prefix) 102{ 103 char *s, *out; 104 struct timeval tv; 105 106 if (log_file == NULL) 107 return; 108 109 if (vasprintf(&s, msg, ap) == -1) 110 return; 111 if (stravis(&out, s, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL) == -1) { 112 free(s); 113 return; 114 } 115 free(s); 116 117 gettimeofday(&tv, NULL); 118 if (fprintf(log_file, "%lld.%06d %s%s\n", (long long)tv.tv_sec, 119 (int)tv.tv_usec, prefix, out) != -1) 120 fflush(log_file); 121 free(out); 122} 123 124/* Log a debug message. */ 125void 126log_debug(const char *msg, ...) 127{ 128 va_list ap; 129 130 if (log_file == NULL) 131 return; 132 133 va_start(ap, msg); 134 log_vwrite(msg, ap, ""); 135 va_end(ap); 136} 137 138#if __GNUC_PREREQ__(4, 6) || defined(__clang__) 139#pragma GCC diagnostic push 140#pragma GCC diagnostic ignored "-Wformat-nonliteral" 141#endif 142 143/* Log a critical error with error string and die. */ 144__dead void 145fatal(const char *msg, ...) 146{ 147 char tmp[256]; 148 va_list ap; 149 150 if (snprintf(tmp, sizeof tmp, "fatal: %s: ", strerror(errno)) < 0) 151 exit(1); 152 153 va_start(ap, msg); 154 log_vwrite(msg, ap, tmp); 155 va_end(ap); 156 157 exit(1); 158} 159 160/* Log a critical error and die. */ 161__dead void 162fatalx(const char *msg, ...) 163{ 164 va_list ap; 165 166 va_start(ap, msg); 167 log_vwrite(msg, ap, "fatal: "); 168 va_end(ap); 169 170 exit(1); 171} 172 173#if __GNUC_PREREQ__(4, 6) || defined(__clang__) 174#pragma GCC diagnostic pop 175#endif 176