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contrib-munin/tools/munin-plugins-busybox/swap.c

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#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include "common.h"
int swap(int argc, char **argv) {
FILE *f;
char buff[256];
int in, out;
if(argc > 1) {
if(!strcmp(argv[1], "config")) {
puts("graph_title Swap in/out\n"
"graph_args -l 0 --base 1000\n"
"graph_vlabel pages per ${graph_period} in (-) / out (+)\n"
"graph_category system\n"
"swap_in.label swap\n"
"swap_in.type DERIVE\n"
"swap_in.max 100000\n"
"swap_in.min 0\n"
"swap_in.graph no\n"
"swap_out.label swap\n"
"swap_out.type DERIVE\n"
"swap_out.max 100000\n"
"swap_out.min 0\n"
"swap_out.negative swap_in");
print_warncrit("swap_in");
print_warncrit("swap_out");
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return 0;
}
if(!strcmp(argv[1], "autoconf"))
return autoconf_check_readable(PROC_STAT);
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}
if(!access("/proc/vmstat", F_OK)) {
in=out=0;
if(!(f=fopen("/proc/vmstat", "r")))
return fail("cannot open /proc/vmstat");
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while(fgets(buff, 256, f)) {
if(!in && !strncmp(buff, "pswpin ", 7)) {
++in;
printf("swap_in.value %s", buff+7);
}
else if(!out && !strncmp(buff, "pswpout ", 8)) {
++out;
printf("swap_out.value %s", buff+8);
}
}
fclose(f);
if(!(in*out))
return fail("no usable data on /proc/vmstat");
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return 0;
} else {
if(!(f=fopen(PROC_STAT, "r")))
return fail("cannot open " PROC_STAT);
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while(fgets(buff, 256, f)) {
if(!strncmp(buff, "swap ", 5)) {
fclose(f);
if(2 != sscanf(buff+5, "%d %d", &in, &out))
return fail("bad data on " PROC_STAT);
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printf("swap_in.value %d\nswap_out.value %d\n", in, out);
return 0;
}
}
fclose(f);
return fail("no swap line found in " PROC_STAT);
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}
}