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Annotation of embedaddon/tmux/log.c, revision 1.1.1.1

1.1       misho       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: 
                     29: static FILE    *log_file;
                     30: static int      log_level;
                     31: 
                     32: static void     log_event_cb(int, const char *);
                     33: static void     log_vwrite(const char *, va_list);
                     34: 
                     35: /* Log callback for libevent. */
                     36: static void
                     37: log_event_cb(__unused int severity, const char *msg)
                     38: {
                     39:        log_debug("%s", msg);
                     40: }
                     41: 
                     42: /* Increment log level. */
                     43: void
                     44: log_add_level(void)
                     45: {
                     46:        log_level++;
                     47: }
                     48: 
                     49: /* Get log level. */
                     50: int
                     51: log_get_level(void)
                     52: {
                     53:        return (log_level);
                     54: }
                     55: 
                     56: /* Open logging to file. */
                     57: void
                     58: log_open(const char *name)
                     59: {
                     60:        char    *path;
                     61: 
                     62:        if (log_level == 0)
                     63:                return;
                     64: 
                     65:        if (log_file != NULL)
                     66:                fclose(log_file);
                     67: 
                     68:        xasprintf(&path, "tmux-%s-%ld.log", name, (long)getpid());
                     69:        log_file = fopen(path, "w");
                     70:        free(path);
                     71:        if (log_file == NULL)
                     72:                return;
                     73: 
                     74:        setvbuf(log_file, NULL, _IOLBF, 0);
                     75:        event_set_log_callback(log_event_cb);
                     76: }
                     77: 
                     78: /* Close logging. */
                     79: void
                     80: log_close(void)
                     81: {
                     82:        if (log_file != NULL)
                     83:                fclose(log_file);
                     84:        log_file = NULL;
                     85: 
                     86:        event_set_log_callback(NULL);
                     87: }
                     88: 
                     89: /* Write a log message. */
                     90: static void
                     91: log_vwrite(const char *msg, va_list ap)
                     92: {
                     93:        char            *fmt, *out;
                     94:        struct timeval   tv;
                     95: 
                     96:        if (log_file == NULL)
                     97:                return;
                     98: 
                     99:        if (vasprintf(&fmt, msg, ap) == -1)
                    100:                exit(1);
                    101:        if (stravis(&out, fmt, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL) == -1)
                    102:                exit(1);
                    103: 
                    104:        gettimeofday(&tv, NULL);
                    105:        if (fprintf(log_file, "%lld.%06d %s\n", (long long)tv.tv_sec,
                    106:            (int)tv.tv_usec, out) == -1)
                    107:                exit(1);
                    108:        fflush(log_file);
                    109: 
                    110:        free(out);
                    111:        free(fmt);
                    112: }
                    113: 
                    114: /* Log a debug message. */
                    115: void
                    116: log_debug(const char *msg, ...)
                    117: {
                    118:        va_list ap;
                    119: 
                    120:        va_start(ap, msg);
                    121:        log_vwrite(msg, ap);
                    122:        va_end(ap);
                    123: }
                    124: 
                    125: /* Log a critical error with error string and die. */
                    126: __dead void
                    127: fatal(const char *msg, ...)
                    128: {
                    129:        char    *fmt;
                    130:        va_list  ap;
                    131: 
                    132:        va_start(ap, msg);
                    133:        if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1)
                    134:                exit(1);
                    135:        log_vwrite(fmt, ap);
                    136:        va_end(ap);
                    137:        exit(1);
                    138: }
                    139: 
                    140: /* Log a critical error and die. */
                    141: __dead void
                    142: fatalx(const char *msg, ...)
                    143: {
                    144:        char    *fmt;
                    145:        va_list  ap;
                    146: 
                    147:        va_start(ap, msg);
                    148:        if (asprintf(&fmt, "fatal: %s", msg) == -1)
                    149:                exit(1);
                    150:        log_vwrite(fmt, ap);
                    151:        va_end(ap);
                    152:        exit(1);
                    153: }