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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");
return 0;
}
if(!strcmp(argv[1], "autoconf")) {
if(0 == access("/proc/stat", R_OK))
return writeyes();
else
return writeno("/proc/stat not readable");
}
}
if(!access("/proc/vmstat", F_OK)) {
in=out=0;
if(!(f=fopen("/proc/vmstat", "r"))) {
fputs("cannot open /proc/vmstat\n", stderr);
return 1;
}
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) {
fputs("no usable data on /proc/vmstat\n", stderr);
return 1;
}
return 0;
} else {
if(!(f=fopen("/proc/stat", "r"))) {
fputs("cannot open /proc/stat\n", stderr);
return 1;
}
while(fgets(buff, 256, f)) {
if(!strncmp(buff, "swap ", 5)) {
fclose(f);
if(2 != sscanf(buff+5, "%d %d", &in, &out)) {
fputs("bad data on /proc/stat\n", stderr);
return 1;
}
printf("swap_in.value %d\nswap_out.value %d\n", in, out);
return 0;
}
}
fclose(f);
fputs("no swap line found in /proc/stat\n", stderr);
return 1;
}
}
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