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Helmut Grohne 2008-06-21 11:33:06 +00:00 • committed by Steve Schnepp
parent 0cde2ae787
commit 209937078b
15 changed files with 737 additions and 0 deletions
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52
tools/munin-plugins-busybox/open_files.c Normal file
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#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include "common.h"
int open_files(int argc, char **argv) {
FILE *f;
int alloc, freeh, avail;
if(argc > 1) {
if(!strcmp(argv[1], "config")) {
if(!(f=fopen("/proc/sys/fs/file-nr", "r"))) {
fprintf(stderr, "cannot open /proc/sys/fs/file-nr\n");
return 1;
}
if(1 != fscanf(f, "%*d %*d %d", &avail)) {
fclose(f);
fprintf(stderr, "cannot read from /proc/sys/fs/file-nr\n");
return 1;
}
fclose(f);
puts("graph_title File table usage\n"
"graph_args --base 1000 -l 0\n"
"graph_vlabel number of open files\n"
"graph_category system\n"
"graph_info This graph monitors the Linux open files table.\n"
"used.label open files\n"
"used.info The number of currently open files.\n"
"max.label max open files\n"
"max.info The maximum supported number of open files. Tune by modifying /proc/sys/fs/file-max.");
printf("used.warning %d\nused.critical %d\n", (int)(avail*0.92), (int)(avail*0.98));
return 0;
}
if(!strcmp(argv[1], "autoconf")) {
if(0 == access("/proc/sys/fs/file-nr", R_OK))
return writeyes();
else
return writeno("/proc/sys/fs/file-nr not readable");
}
}
if(!(f=fopen("/proc/sys/fs/file-nr", "r"))) {
fputs("cannot open /proc/sys/fs/file-nr\n", stderr);
return 1;
}
if(3 != fscanf(f, "%d %d %d", &alloc, &freeh, &avail)) {
fclose(f);
fputs("cannot read from /proc/sys/fs/file-nr\n", stderr);
return 1;
}
fclose(f);
printf("used.value %d\nmax.value %d\n", alloc-freeh, avail);
return 0;
}