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-rw-r--r--forks.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/forks.c b/forks.c
new file mode 100644
index 0000000..fa4dadb
--- /dev/null
+++ b/forks.c
@@ -0,0 +1,44 @@
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include "common.h"
+
+int forks(int argc, char **argv) {
+ FILE *f;
+ char buff[256];
+ if(argc > 1) {
+ if(!strcmp(argv[1], "config")) {
+ puts("graph_title Fork rate\n"
+ "graph_args --base 1000 -l 0 \n"
+ "graph_vlabel forks / ${graph_period}\n"
+ "graph_category processes\n"
+ "graph_info This graph shows the forking rate (new processes started).\n"
+ "forks.label forks\n"
+ "forks.type DERIVE\n"
+ "forks.min 0\n"
+ "forks.max 100000\n"
+ "forks.info The number of forks per second.");
+ return 0;
+ }
+ if(!strcmp(argv[1], "autoconf")) {
+ if(0 == access("/proc/stat", R_OK))
+ return writeyes();
+ else
+ return writeno("/proc/stat not readable");
+ }
+ }
+ if(!(f=fopen("/proc/stat", "r"))) {
+ fputs("cannot open /proc/stat\n", stderr);
+ return 1;
+ }
+ while(fgets(buff, 256, f)) {
+ if(!strncmp(buff, "processes ", 10)) {
+ fclose(f);
+ printf("forks.value %s", buff+10);
+ return 0;
+ }
+ }
+ fclose(f);
+ fputs("no processes line found in /proc/stat\n", stderr);
+ return 1;
+}