1 /* $OpenBSD$ */ 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) __printflike(1, 0); 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 if (log_file != NULL) 45 fclose(log_file); 46 47 log_file = fopen(path, "w"); 48 if (log_file == NULL) 49 return; 50 51 setvbuf(log_file, NULL, _IOLBF, 0); 52 event_set_log_callback(log_event_cb); 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 #ifdef notyet 79 if (stravis(&out, fmt, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL) == -1) 80 exit(1); 81 #else 82 size_t len = strlen(fmt) * 4 + 1; 83 out = xmalloc(len); 84 if (strnvis(out, len, fmt, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL) == -1) 85 exit(1); 86 #endif 87 88 gettimeofday(&tv, NULL); 89 if (fprintf(log_file, "%lld.%06d %s\n", (long long)tv.tv_sec, 90 (int)tv.tv_usec, out) == -1) 91 exit(1); 92 fflush(log_file); 93 free(out); 94 free(fmt); 95 } 96 #if __GNUC_PREREQ__(4, 6) || defined(__clang__) 97 #pragma GCC diagnostic push 98 #endif 99 100 /* Log a debug message. */ 101 void 102 log_debug(const char *msg, ...) 103 { 104 va_list ap; 105 106 va_start(ap, msg); 107 log_vwrite(msg, ap); 108 va_end(ap); 109 } 110 111 /* Log a critical error with error string and die. */ 112 __dead void 113 log_fatal(const char *msg, ...) 114 { 115 char *fmt; 116 va_list ap; 117 118 va_start(ap, msg); 119 if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1) 120 exit(1); 121 log_vwrite(fmt, ap); 122 exit(1); 123 } 124 125 /* Log a critical error and die. */ 126 __dead void 127 log_fatalx(const char *msg, ...) 128 { 129 char *fmt; 130 va_list ap; 131 132 va_start(ap, msg); 133 if (asprintf(&fmt, "fatal: %s", msg) == -1) 134 exit(1); 135 log_vwrite(fmt, ap); 136 exit(1); 137 } 138