1 /* $OpenBSD: log.c,v 1.15 2015/09/01 19:14:43 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 log_file = fopen(path, "w"); 46 if (log_file == NULL) 47 return; 48 49 setvbuf(log_file, NULL, _IOLBF, 0); 50 event_set_log_callback(log_event_cb); 51 52 tzset(); 53 } 54 55 /* Close logging. */ 56 void 57 log_close(void) 58 { 59 if (log_file != NULL) 60 fclose(log_file); 61 log_file = NULL; 62 63 event_set_log_callback(NULL); 64 } 65 66 /* Write a log message. */ 67 void 68 log_vwrite(const char *msg, va_list ap) 69 { 70 char *fmt, *out; 71 struct timeval tv; 72 73 if (log_file == NULL) 74 return; 75 76 if (vasprintf(&fmt, msg, ap) == -1) 77 exit(1); 78 if (stravis(&out, fmt, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL) == -1) 79 exit(1); 80 81 gettimeofday(&tv, NULL); 82 if (fprintf(log_file, "%lld.%06d %s\n", (long long)tv.tv_sec, 83 (int)tv.tv_usec, out) == -1) 84 exit(1); 85 fflush(log_file); 86 87 free(out); 88 free(fmt); 89 } 90 91 /* Log a debug message. */ 92 void 93 log_debug(const char *msg, ...) 94 { 95 va_list ap; 96 97 va_start(ap, msg); 98 log_vwrite(msg, ap); 99 va_end(ap); 100 } 101 102 /* Log a critical error with error string and die. */ 103 __dead void 104 log_fatal(const char *msg, ...) 105 { 106 char *fmt; 107 va_list ap; 108 109 va_start(ap, msg); 110 if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1) 111 exit(1); 112 log_vwrite(fmt, ap); 113 exit(1); 114 } 115 116 /* Log a critical error and die. */ 117 __dead void 118 log_fatalx(const char *msg, ...) 119 { 120 char *fmt; 121 va_list ap; 122 123 va_start(ap, msg); 124 if (asprintf(&fmt, "fatal: %s", msg) == -1) 125 exit(1); 126 log_vwrite(fmt, ap); 127 exit(1); 128 } 129