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log: don't keep log file open 

The log file is duped to STDOUT_FILENO and STDERR_FILENO.  No need to
keep another copy of it in out_fd all the time.  We only need it once
once in setup_log_output().
This commit is contained in:
Max Kellermann 2008-12-28 19:48:53 +01:00
parent 8fe03b8bce
commit 59cf77bbc8
1 changed files with 15 additions and 14 deletions
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29
src/log.c
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@ -49,15 +49,15 @@ static GLogLevelFlags log_threshold = G_LOG_LEVEL_MESSAGE;
static const char *log_charset;
static bool stdout_mode = true;
static int out_fd = -1;
static int out_fd;
static const char *out_filename;
static void redirect_logs(void)
static void redirect_logs(int fd)
{
assert(out_fd >= 0);
if (dup2(out_fd, STDOUT_FILENO) < 0)
assert(fd >= 0);
if (dup2(fd, STDOUT_FILENO) < 0)
FATAL("problems dup2 stdout : %s\n", strerror(errno));
if (dup2(out_fd, STDERR_FILENO) < 0)
if (dup2(fd, STDERR_FILENO) < 0)
FATAL("problems dup2 stderr : %s\n", strerror(errno));
}
@ -247,8 +247,11 @@ void setup_log_output(bool use_stdout)
{
fflush(NULL);
if (!use_stdout) {
if (out_filename != NULL)
redirect_logs();
if (out_filename != NULL) {
redirect_logs(out_fd);
close(out_fd);
}
stdout_mode = false;
log_charset = NULL;
}
@ -284,6 +287,8 @@ G_GNUC_PRINTF(1, 2) G_GNUC_NORETURN void FATAL(const char *fmt, ...)
int cycle_log_files(void)
{
int fd;
if (stdout_mode || out_filename == NULL)
return 0;
assert(out_filename);
@ -291,13 +296,13 @@ int cycle_log_files(void)
DEBUG("Cycling log files...\n");
close_log_files();
out_fd = open_log_file();
if (out_fd < 0) {
fd = open_log_file();
if (fd < 0) {
ERROR("error re-opening log file: %s\n", out_filename);
return -1;
}
redirect_logs();
redirect_logs(fd);
DEBUG("Done cycling log files\n");
return 0;
}
@ -309,9 +314,5 @@ void close_log_files(void)
if (out_filename == NULL)
closelog();
else {
assert(out_fd >= 0);
close(out_fd);
}
}