1 /* $OpenBSD: log.c,v 1.11 2014/10/20 23:57:13 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net> 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 26 #include "tmux.h" 27 28 FILE *log_file; 29 30 void log_event_cb(int, const char *); 31 void log_vwrite(const char *, va_list); 32 33 /* Log callback for libevent. */ 34 void 35 log_event_cb(unused int severity, const char *msg) 36 { 37 log_debug("%s", msg); 38 } 39 40 /* Open logging to file. */ 41 void 42 log_open(const char *path) 43 { 44 log_file = fopen(path, "w"); 45 if (log_file == NULL) 46 return; 47 48 setlinebuf(log_file); 49 event_set_log_callback(log_event_cb); 50 51 tzset(); 52 } 53 54 /* Close logging. */ 55 void 56 log_close(void) 57 { 58 if (log_file != NULL) 59 fclose(log_file); 60 log_file = NULL; 61 62 event_set_log_callback(NULL); 63 } 64 65 /* Write a log message. */ 66 void 67 log_vwrite(const char *msg, va_list ap) 68 { 69 char *fmt; 70 71 if (log_file == NULL) 72 return; 73 74 if (asprintf(&fmt, "%s\n", msg) == -1) 75 exit(1); 76 if (vfprintf(log_file, fmt, ap) == -1) 77 exit(1); 78 fflush(log_file); 79 free(fmt); 80 } 81 82 /* Log a debug message. */ 83 void 84 log_debug(const char *msg, ...) 85 { 86 va_list ap; 87 88 va_start(ap, msg); 89 log_vwrite(msg, ap); 90 va_end(ap); 91 } 92 93 /* Log a critical error with error string and die. */ 94 __dead void 95 log_fatal(const char *msg, ...) 96 { 97 char *fmt; 98 va_list ap; 99 100 va_start(ap, msg); 101 if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1) 102 exit(1); 103 log_vwrite(fmt, ap); 104 exit(1); 105 } 106 107 /* Log a critical error and die. */ 108 __dead void 109 log_fatalx(const char *msg, ...) 110 { 111 char *fmt; 112 va_list ap; 113 114 va_start(ap, msg); 115 if (asprintf(&fmt, "fatal: %s", msg) == -1) 116 exit(1); 117 log_vwrite(fmt, ap); 118 exit(1); 119 } 120