mirror of
https://github.com/munin-monitoring/contrib.git
synced 2018-11-08 00:59:34 +01:00
71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
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#include <ctype.h>
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#include <dirent.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "common.h"
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int threads(int argc, char **argv) {
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FILE *f;
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char buff[256];
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const char *s;
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int i, sum;
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DIR *d;
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struct dirent *e;
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if(argc > 1) {
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if(!strcmp(argv[1], "autoconf")) {
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i = getpid();
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sprintf(buff, "/proc/%d/status", i);
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if(NULL == (f = fopen(buff, "r")))
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return fail("failed to open /proc/$$/status");
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while(fgets(buff, 256, f))
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if(!strncmp(buff, "Threads:", 8)) {
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fclose(f);
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return writeyes();
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}
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fclose(f);
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puts("no");
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return 0;
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}
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if(!strcmp(argv[1], "config")) {
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puts("graph_title Number of threads\n"
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"graph_vlabel number of threads\n"
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"graph_category processes\n"
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"graph_info This graph shows the number of threads.\n"
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"threads.label threads\n"
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"threads.info The current number of threads.");
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return 0;
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}
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}
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if(NULL == (d = opendir("/proc")))
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return fail("cannot open /proc");
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sum = 0;
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while((e = readdir(d))) {
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for(s=e->d_name;*s;++s)
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if(!isdigit(*s))
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break;
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if(*s) /* non-digit found */
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continue;
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snprintf(buff, 256, "/proc/%s/status", e->d_name);
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if(!(f = fopen(buff, "r")))
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continue; /* process has vanished */
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while(fgets(buff, 256, f)) {
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if(strncmp(buff, "Threads:", 8))
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continue;
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if(1 != sscanf(buff+8, "%d", &i)) {
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fclose(f);
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closedir(d);
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return fail("failed to parse "
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"/proc/somepid/status");
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}
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sum += i;
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}
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fclose(f);
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}
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closedir(d);
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printf("threads.value %d\n", sum);
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return 0;
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}
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