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mirror of https://github.com/munin-monitoring/contrib.git synced 2018-11-08 00:59:34 +01:00

mpb: add threads.c plugin

This commit is contained in:
Helmut Grohne 2013-02-05 13:12:43 +01:00
parent 05a642549d
commit 4337b550a0
3 changed files with 78 additions and 2 deletions

View File

@ -1,9 +1,10 @@
CC=gcc CC=gcc
CFLAGS=-W -Wall -pedantic -Wextra -g -O2 CFLAGS=-W -Wall -pedantic -Wextra -g -O2
OBJS=main.o common.o cpu.o entropy.o forks.o fw_packets.o interrupts.o \ OBJS=main.o common.o cpu.o entropy.o forks.o fw_packets.o interrupts.o \
if_err_.o load.o open_files.o open_inodes.o processes.o swap.o uptime.o if_err_.o load.o open_files.o open_inodes.o processes.o swap.o threads.o \
uptime.o
LINKS=cpu entropy forks fw_packets interrupts if_err_eth0 load open_files \ LINKS=cpu entropy forks fw_packets interrupts if_err_eth0 load open_files \
open_inodes processes swap uptime open_inodes processes swap threads uptime
%.o:%.c %.o:%.c
${CC} ${CFLAGS} -c $< -o $@ ${CC} ${CFLAGS} -c $< -o $@

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@ -14,6 +14,7 @@ int open_files(int argc, char **argv);
int open_inodes(int argc, char **argv); int open_inodes(int argc, char **argv);
int processes(int argc, char **argv); int processes(int argc, char **argv);
int swap(int argc, char **argv); int swap(int argc, char **argv);
int threads(int argc, char **argv);
int uptime(int argc, char **argv); int uptime(int argc, char **argv);
int busybox(int argc, char **argv) { int busybox(int argc, char **argv) {
@ -72,6 +73,10 @@ int main(int argc, char **argv) {
if(!strcmp(progname+1, "wap")) if(!strcmp(progname+1, "wap"))
return swap(argc, argv); return swap(argc, argv);
break; break;
case 't':
if(!strcmp(progname+1, "hreads"))
return threads(argc, argv);
break;
case 'u': case 'u':
if(!strcmp(progname+1, "ptime")) if(!strcmp(progname+1, "ptime"))
return uptime(argc, argv); return uptime(argc, argv);

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@ -0,0 +1,70 @@
#include <ctype.h>
#include <dirent.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include "common.h"
int threads(int argc, char **argv) {
FILE *f;
char buff[256];
const char *s;
int i, sum;
DIR *d;
struct dirent *e;
if(argc > 1) {
if(!strcmp(argv[1], "autoconf")) {
i = getpid();
sprintf(buff, "/proc/%d/status", i);
if(NULL == (f = fopen(buff, "r")))
return fail("failed to open /proc/$$/status");
while(fgets(buff, 256, f))
if(!strncmp(buff, "Threads:", 8)) {
fclose(f);
return writeyes();
}
fclose(f);
puts("no");
return 0;
}
if(!strcmp(argv[1], "config")) {
puts("graph_title Number of threads\n"
"graph_vlabel number of threads\n"
"graph_category processes\n"
"graph_info This graph shows the number of threads.\n"
"threads.label threads\n"
"threads.info The current number of threads.");
return 0;
}
}
if(NULL == (d = opendir("/proc")))
return fail("cannot open /proc");
sum = 0;
while((e = readdir(d))) {
for(s=e->d_name;*s;++s)
if(!isdigit(*s))
break;
if(*s) /* non-digit found */
continue;
snprintf(buff, 256, "/proc/%s/status", e->d_name);
if(!(f = fopen(buff, "r")))
continue; /* process has vanished */
while(fgets(buff, 256, f)) {
if(strncmp(buff, "Threads:", 8))
continue;
if(1 != sscanf(buff+8, "%d", &i)) {
fclose(f);
closedir(d);
return fail("failed to parse "
"/proc/somepid/status");
}
sum += i;
}
fclose(f);
}
closedir(d);
printf("threads.value %d\n", sum);
return 0;
}