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tools/munin-plugins-busybox/processes.c

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+#include <string.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <ctype.h>
+#include "common.h"
+
+int processes(int argc, char **argv) {
+	DIR *d;
+	struct dirent *e;
+	char *s;
+	int n=0;
+	if(argc > 1) {
+		if(!strcmp(argv[1], "config")) {
+			puts("graph_title Number of Processes\n"
+				"graph_args --base 1000 -l 0 \n"
+				"graph_vlabel number of processes\n"
+				"graph_category processes\n"
+				"graph_info This graph shows the number of processes in the system.\n"
+				"processes.label processes\n"
+				"processes.draw LINE2\n"
+				"processes.info The current number of processes.");
+			return 0;
+		}
+		if(!strcmp(argv[1], "autoconf"))
+			return writeyes();
+	}
+	if(!(d = opendir("/proc"))) {
+		fputs("cannot open /proc\n", stderr);
+		return 1;
+	}
+	while((e = readdir(d))) {
+		for(s=e->d_name;*s;++s)
+			if(!isdigit(*s))
+				break;
+		if(!*s)
+			++n;
+	}
+	closedir(d);
+	printf("processes.value %d\n", n);
+	return 0;
+}