diff options
Diffstat (limited to 'log.c')
| -rw-r--r-- | log.c | 218 |
1 files changed, 218 insertions, 0 deletions
@@ -0,0 +1,218 @@ +/* $Id: log.c,v 1.1.1.1 2007-07-09 19:03:33 nicm Exp $ */ + +/* + * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER + * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <sys/types.h> + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <syslog.h> + +#include "tmux.h" + +/* Logging enabled. */ +int log_enabled; + +/* Log stream or NULL to use syslog. */ +FILE *log_stream; + +/* Debug level. */ +int log_level; + +/* Open log. */ +void +log_open(FILE *f, int facility, int level) +{ + log_stream = f; + log_level = level; + + if (f == NULL) + openlog(__progname, LOG_PID|LOG_NDELAY, facility); + tzset(); + + log_enabled = 1; +} + +/* Close logging. */ +void +log_close(void) +{ + if (log_stream != NULL) + fclose(log_stream); + + log_enabled = 0; +} + +/* Write a log message. */ +void +log_write(FILE *f, int priority, const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + log_vwrite(f, priority, fmt, ap); + va_end(ap); +} + +/* Write a log message. */ +void +log_vwrite(FILE *f, int priority, const char *fmt, va_list ap) +{ + if (!log_enabled) + return; + + if (f == NULL) { + vsyslog(priority, fmt, ap); + return; + } + + if (vfprintf(f, fmt, ap) == -1) + exit(1); + if (fputc('\n', f) == EOF) + exit(1); + fflush(log_stream); +} + +/* Log a warning with error string. */ +void printflike1 +log_warn(const char *msg, ...) +{ + va_list ap; + char *fmt; + + if (!log_enabled) + return; + + va_start(ap, msg); + if (asprintf(&fmt, "%s: %s", msg, strerror(errno)) == -1) + exit(1); + log_vwrite(log_stream, LOG_CRIT, fmt, ap); + xfree(fmt); + va_end(ap); +} + +/* Log a warning. */ +void printflike1 +log_warnx(const char *msg, ...) +{ + va_list ap; + + va_start(ap, msg); + log_vwrite(log_stream, LOG_CRIT, msg, ap); + va_end(ap); +} + +/* Log an informational message. */ +void printflike1 +log_info(const char *msg, ...) +{ + va_list ap; + + if (log_level > -1) { + va_start(ap, msg); + if (log_stream == stderr) + log_vwrite(stdout, LOG_INFO, msg, ap); + else + log_vwrite(log_stream, LOG_INFO, msg, ap); + va_end(ap); + } +} + +/* Log a debug message. */ +void printflike1 +log_debug(const char *msg, ...) +{ + va_list ap; + + if (log_level > 0) { + va_start(ap, msg); + log_vwrite(log_stream, LOG_DEBUG, msg, ap); + va_end(ap); + } +} + +/* Log a debug message at level 2. */ +void printflike1 +log_debug2(const char *msg, ...) +{ + va_list ap; + + if (log_level > 1) { + va_start(ap, msg); + log_vwrite(log_stream, LOG_DEBUG, msg, ap); + va_end(ap); + } +} + +/* Log a debug message at level 3. */ +void printflike1 +log_debug3(const char *msg, ...) +{ + va_list ap; + + if (log_level > 2) { + va_start(ap, msg); + log_vwrite(log_stream, LOG_DEBUG, msg, ap); + va_end(ap); + } +} + +/* Log a critical error, with error string if necessary, and die. */ +__dead void +log_vfatal(const char *msg, va_list ap) +{ + char *fmt; + + if (!log_enabled) + exit(1); + + if (errno != 0) { + if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1) + exit(1); + log_vwrite(log_stream, LOG_CRIT, fmt, ap); + } else { + if (asprintf(&fmt, "fatal: %s", msg) == -1) + exit(1); + log_vwrite(log_stream, LOG_CRIT, fmt, ap); + } + xfree(fmt); + + exit(1); +} + +/* Log a critical error, with error string, and die. */ +__dead void +log_fatal(const char *msg, ...) +{ + va_list ap; + + va_start(ap, msg); + log_vfatal(msg, ap); +} + +/* Log a critical error and die. */ +__dead void +log_fatalx(const char *msg, ...) +{ + va_list ap; + + errno = 0; + va_start(ap, msg); + log_vfatal(msg, ap); +} |