Nagios plug-in system open file count monitoring

VI check_open_file.c (used by Linux systems only)

#include <stdio.h> #include <stdlib.h> #include <string.h> #define OK 0#define WARNING 1#define crit ICAL 2#define UNKNOWN 3#define LEN 1000#define file_nr "/proc/sys/fs/file-nr" int Exitstatus=ok;char *exit_status[4]={" Ok "," WARNING "," CRITICAL "," UNKNOWN "};char Status_information[len];char performance_data[len];int parse_cmd () {int R        et=0;        FILE *FP;        Char Readbuf[len];        int i;        Char *p,*str;        float used_percent=0;        Char used_handle[len]={0},free_handle[len]={0},max_handle[len]={0};        Fp=fopen (FILE_NR, "R");                if (fp==null) {//fprintf (stderr, "fopen () error.\n"); sprintf (status_information, "File not exist, used_handle=%s max_handle=%s used_percent=%.0f%%", "0", "0", used_percent*                100); sprintf (Performance_data, "used_handle=%s;;;; max_handle=%s;;;; used_percent=%.0f%%;30;50;;", "0", "0", used_percent                *100);                exitstatus=critical; printf ("%s:%s | %s\n ", exIt_status[exitstatus],status_information,performance_data);        Exit (Exitstatus);        } str=fgets (READBUF,LEN,FP);                if (str==null) {fprintf (stderr, "fgets () error.\n");        return-1;        }//printf ("readbuf=%s", readbuf); RET=SSCANF (Readbuf, "%s\t%s\t%s", used_handle,free_handle,max_handle);//printf ("sscanf ret=%d\n", ret);//printf ("        Used_handle=%s,free_handle=%s,max_handle=%s\n ", Used_handle,free_handle,max_handle); Used_percent= (float) (Atoi (Used_handle)/(float) atoi (max_handle));//printf ("used_percent=%f\n", used_percent);//P        rintf ("used_percent=%.0f\n", used_percent*100);          if (used_percent>=0 && used_percent<30) {Exitstatus=ok;             } else if (used_percent>=30 && used_percent<50) {exitstatus=warning;    } else if (used_percent>=50 && used_percent<=100) {exitstatus=critical;    } else {exitstatus=critical; } sprintf (Status_information, "used_handle=%s max_handle=%s used_percent=%.0f%%", Used_handle,max_handle,used_        PERCENT*100); sprintf (Performance_data, "used_handle=%s;;;; max_handle=%s;;;; used_percent=%.0f%%;30;50;;", Used_handle,max_        HANDLE,USED_PERCENT*100);        Ret=fclose (FP);                if (ret==eof) {fprintf (stderr, "fclose () error.\n");        return-1; }//while (Fgets (READBUF,1024,FP)!=null) {/* for (P=strtok (Readbuf, "");p; P=strtok (NUL                        L, "")) {//str=p;                        sprintf (status_information, "active call=%s", p);                        sprintf (Performance_data, "call=%s;;;;", p);                Break                } break; */return 0;}        int main () {int ret;        Ret=parse_cmd ();       if (ret!=0) {fprintf (stderr, "Parse_cmd () error.\n");        exitstatus=critical; printf ("%s:-%s |        %s\n ", exit_status[exitstatus],status_information,performance_data);        Exit (-1); } printf ("%s:%s |        %s\n ", exit_status[exitstatus],status_information,performance_data); return exitstatus;}

Nagios plug-in system open file count monitoring