Mirrors/Munin-Contrib
1
0
Fork 0
mirror of https://github.com/munin-monitoring/contrib.git synced 2025-07-22 02:51:03 +00:00
Code Issues Releases Wiki Activity

p/multicpu1sec-c: use posix IO instead of stdlib

Browse source
This commit is contained in:
Steve Schnepp 2015-05-26 20:50:26 +00:00
parent 7d88587fb6
commit 2db160e268
1 changed files with 16 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

23
plugins/system/multicpu1sec/multicpu1sec-c.c
View file

@ -21,23 +21,30 @@ int fail(char* msg) {
int config() {
/* Get the number of CPU */
FILE* f;
if ( !(f=fopen(PROC_STAT, "r")) ) {
int f;
if ( !(f=open(PROC_STAT, O_RDONLY)) ) {
return fail("cannot open " PROC_STAT);
}
// Starting with -1, since the first line is the "global cpu line"
int ncpu = -1;
while (! feof(f)) {
char buffer[1024];
if (fgets(buffer, 1024, f) == 0) {
break;
const int buffer_size = 64 * 1024;
char buffer[buffer_size];
// whole /proc/stat can be read in 1 syscall
if (read(f, buffer, buffer_size) <= 0) {
return fail("cannot read " PROC_STAT);
}
if (! strncmp(buffer, "cpu", 3)) ncpu ++;
// tokenization per-line
char* line;
char* newl = "\n";
for (line = strtok(buffer, newl); line; line = strtok(NULL, newl)) {
if (! strncmp(line, "cpu", 3)) ncpu ++;
}
fclose(f);
close(f);
printf(
"graph_title multicpu1sec\n"