Robot/contrib-munin
2
0
Fork 0
mirror of https://github.com/munin-monitoring/contrib.git synced 2018-11-08 00:59:34 +01:00
Code Issues Releases Wiki Activity

p/if1sec-c: handle absence of state file

Browse Source
This commit is contained in:
Steve Schnepp 2018-04-10 22:25:49 +02:00
parent c81c20ab3b
commit cc0b094938
1 changed files with 12 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
plugins/network/if1sec-c.c
View File

@ -38,8 +38,8 @@ char* get_ifname_from_procstatline(char* line) {
int config() {
/* Get the number of if */
int f;
if ( !(f=open(PROC_STAT, O_RDONLY)) ) {
int f = open(PROC_STAT, O_RDONLY);
if ( f == -1 ) {
return fail("cannot open " PROC_STAT);
}
@ -120,7 +120,7 @@ int acquire() {
/* fork ourselves if not asked otherwise */
char* no_fork = getenv("no_fork");
if (! no_fork || strcmp("1", no_fork)) {
if (fork()) return;
if (fork()) return 0;
// we are the child, complete the daemonization
/* Close standard IO */
@ -139,9 +139,15 @@ int acquire() {
/* Reading /proc/stat */
int f = open(PROC_STAT, O_RDONLY);
if ( f == -1 ) {
return fail("cannot open " PROC_STAT);
}
/* open the spoolfile */
int cache_file = open(cache_filename, O_CREAT | O_APPEND | O_WRONLY, S_IRUSR | S_IWUSR);
if ( cache_file == -1 ) {
return fail("cannot open the spoolfile");
}
/* loop each second */
while (1) {
@ -213,6 +219,9 @@ int acquire() {
int fetch() {
FILE* cache_file = fopen(cache_filename, "r+");
if ( !cache_file ) {
return fail("cannot open cache file");
}
/* lock */
flock(fileno(cache_file), LOCK_EX);