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/*
* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
* Copyright (c) 2019 Thomas Adam <thomas@fvwm.org>
*
* 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 "config.h"
#include <sys/types.h>
#include <sys/time.h>
#include <errno.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "fvwmlib.h"
#include "getpwuid.h"
#include "log.h"
static char *log_file_name;
static FILE *log_file;
int lib_log_level = 0;
void
set_log_file(char *name)
{
if (log_file_name != NULL)
{
free(log_file_name);
log_file_name = NULL;
}
if (name != NULL)
{
log_file_name = fxstrdup(name);
}
}
/* Open logging to file. */
void
log_open(const char *fvwm_userdir)
{
char *path, *file_name;
char *expanded_path;
if (lib_log_level == 0)
return;
/* determine file name or file path to use */
file_name = log_file_name;
if (file_name == NULL)
{
file_name = getenv("FVWM3_LOGFILE");
}
if (file_name == NULL)
{
file_name = FVWM3_LOGFILE_DEFAULT;
}
/* handle stderr logging */
if (file_name[0] == '-' && file_name[1] == 0)
{
log_file = stderr;
return;
}
/* handle file logging */
expanded_path = expand_path(file_name);
if (expanded_path[0] == '/')
{
path = expanded_path;
}
else
{
xasprintf(&path, "%s/%s", fvwm_userdir, expanded_path);
free((char *)expanded_path);
}
log_close();
if ((log_file = fopen(path, "a")) == NULL) {
free(path);
return;
}
setvbuf(log_file, NULL, _IOLBF, 0);
free(path);
}
/* Toggle logging. */
void
log_toggle(const char *fvwm_userdir)
{
if (lib_log_level == 0) {
lib_log_level = 1;
log_open(fvwm_userdir);
fvwm_debug(NULL, "log opened (because of SIGUSR2)");
} else {
fvwm_debug(NULL, "log closed (because of SIGUSR2)");
lib_log_level = 0;
log_close();
}
}
/* Close logging. */
void
log_close(void)
{
if (log_file != NULL && log_file != stderr)
fclose(log_file);
log_file = NULL;
}
/* Write a log message. */
static void
log_vwrite(const char *func, const char *msg, va_list ap)
{
char *fmt, *sep = ":";
struct timeval tv;
if (log_file == NULL)
return;
if (func == NULL) {
func = "";
sep = "";
}
if (vasprintf(&fmt, msg, ap) == -1)
exit(1);
gettimeofday(&tv, NULL);
if (fprintf(log_file, "[%lld.%06d] %s%s %s", (long long)tv.tv_sec,
(int)tv.tv_usec, func, sep, fmt) == -1)
exit(1);
/* Compat: some callers from conversion of printf(stderr, ...) most
* likely add a newline. But we don't want to double-up on newlines
* in output. Add one if not present.
*/
if (fmt[strlen(fmt) - 1] != '\n') {
if (fprintf(log_file, "\n") == -1)
exit(1);
}
fflush(log_file);
free(fmt);
}
/* Log a debug message. */
void
fvwm_debug(const char *func, const char *msg, ...)
{
va_list ap;
va_start(ap, msg);
log_vwrite(func, msg, ap);
va_end(ap);
}
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