1 /* $OpenBSD: log.c,v 1.17 2015/09/24 12:03:58 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 #include <vis.h> 26 27 #include "tmux.h" 28 29 FILE *log_file; 30 31 void log_event_cb(int, const char *); 32 void log_vwrite(const char *, va_list); 33 34 /* Log callback for libevent. */ 35 void 36 log_event_cb(unused int severity, const char *msg) 37 { 38 log_debug("%s", msg); 39 } 40 41 /* Open logging to file. */ 42 void 43 log_open(const char *path) 44 { 45 if (log_file != NULL) 46 fclose(log_file); 47 48 log_file = fopen(path, "w"); 49 if (log_file == NULL) 50 return; 51 52 setvbuf(log_file, NULL, _IOLBF, 0); 53 event_set_log_callback(log_event_cb); 54 } 55 56 /* Close logging. */ 57 void 58 log_close(void) 59 { 60 if (log_file != NULL) 61 fclose(log_file); 62 log_file = NULL; 63 64 event_set_log_callback(NULL); 65 } 66 67 /* Write a log message. */ 68 void 69 log_vwrite(const char *msg, va_list ap) 70 { 71 char *fmt, *out; 72 struct timeval tv; 73 74 if (log_file == NULL) 75 return; 76 77 if (vasprintf(&fmt, msg, ap) == -1) 78 exit(1); 79 if (stravis(&out, fmt, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL) == -1) 80 exit(1); 81 82 gettimeofday(&tv, NULL); 83 if (fprintf(log_file, "%lld.%06d %s\n", (long long)tv.tv_sec, 84 (int)tv.tv_usec, out) == -1) 85 exit(1); 86 fflush(log_file); 87 88 free(out); 89 free(fmt); 90 } 91 92 /* Log a debug message. */ 93 void 94 log_debug(const char *msg, ...) 95 { 96 va_list ap; 97 98 va_start(ap, msg); 99 log_vwrite(msg, ap); 100 va_end(ap); 101 } 102 103 /* Log a critical error with error string and die. */ 104 __dead void 105 log_fatal(const char *msg, ...) 106 { 107 char *fmt; 108 va_list ap; 109 110 va_start(ap, msg); 111 if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1) 112 exit(1); 113 log_vwrite(fmt, ap); 114 exit(1); 115 } 116 117 /* Log a critical error and die. */ 118 __dead void 119 log_fatalx(const char *msg, ...) 120 { 121 char *fmt; 122 va_list ap; 123 124 va_start(ap, msg); 125 if (asprintf(&fmt, "fatal: %s", msg) == -1) 126 exit(1); 127 log_vwrite(fmt, ap); 128 exit(1); 129 } 130