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Annotation of embedaddon/tmux/log.c, revision 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: }