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debug: factor out logfile size check

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The new function will also be used for upcoming per-debug-class logfiles.

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This commit is contained in:
Ralph Boehme 2018-12-12 12:45:11 +01:00 committed by Jeremy Allison
parent 4341f24069
commit 7369674787
1 changed files with 54 additions and 19 deletions
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73
lib/util/debug.c
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@ -1174,10 +1174,61 @@ bool need_to_check_log_size(void)
Check to see if the log has grown to be too big.
**************************************************************************/
static void do_one_check_log_size(off_t maxlog, int *_fd, const char *logfile)
{
char name[strlen(logfile) + 5];
struct stat st;
int fd = *_fd;
int ret;
bool ok;
if (maxlog == 0) {
return;
}
ret = fstat(fd, &st);
if (ret != 0) {
return;
}
if (st.st_size < maxlog ) {
return;
}
/* reopen_logs_internal() modifies *_fd */
(void)reopen_logs_internal();
fd = *_fd;
if (fd <= 2) {
return;
}
ret = fstat(fd, &st);
if (ret != 0) {
return;
}
if (st.st_size < maxlog) {
return;
}
snprintf(name, sizeof(name), "%s.old", logfile);
(void)rename(logfile, name);
ok = reopen_logs_internal();
if (ok) {
return;
}
/* We failed to reopen a log - continue using the old name. */
(void)rename(name, logfile);
}
static void do_check_log_size(off_t maxlog)
{
do_one_check_log_size(maxlog, &state.fd, state.debugf);
}
void check_log_size( void )
{
int maxlog;
struct stat st;
off_t maxlog;
/*
* We need to be root to check/change log-file, skip this and let the main
@ -1207,23 +1258,7 @@ void check_log_size( void )
(void)reopen_logs_internal();
}
if (maxlog && (fstat(state.fd, &st) == 0
&& st.st_size > maxlog )) {
(void)reopen_logs_internal();
if (state.fd > 2 && (fstat(state.fd, &st) == 0
&& st.st_size > maxlog)) {
char name[strlen(state.debugf) + 5];
snprintf(name, sizeof(name), "%s.old", state.debugf);
(void)rename(state.debugf, name);
if (!reopen_logs_internal()) {
/* We failed to reopen a log - continue using the old name. */
(void)rename(name, state.debugf);
}
}
}
do_check_log_size(maxlog);
/*
* Here's where we need to panic if state.fd == 0 or -1 (invalid values)