c - How can i perform my exe file from boot.local -

i've written code boosting priority of process on opensuse 12.2 system.

#include <stdio.h> #include <sched.h> #include <unistd.h>  int printusage(void) {     printf("\nusage:\nboostprio [pid] [priority: (0-99)] [policy: ff:rr:oth]\n");     exit (1); }  int main (int argc , char *argv[]) {     int pid = -1 ;     int pri;      struct sched_param param;      if(argc != 4 ){         printf("\nargument miss match !!");         printusage();         return -1;         }      if((strcmp(argv[1],"-h" ) == 0) || (strcmp(argv[1],"--help") == 0))         printusage();      pid = atoi(argv[1]);      if(pid <= 0){         printf("\npid not correct!!\n");         return -1;     }     pri = atoi(argv[2]);     if((pri > 99) || (pri < 0)){         printf("\npriority value not valid !!\n");         return -1;         }     param.sched_priority = pri;      if(strcmp(argv[3],"ff") == 0)          sched_setscheduler((pid_t)pid, sched_fifo, &param);     else if(strcmp(argv[3],"rr") == 0)          sched_setscheduler((pid_t)pid, sched_rr, &param);     else if(strcmp(argv[3],"oth") == 0)                  sched_setscheduler((pid_t)pid, sched_other, &param);     else{         printf("\ninvalid scheduling policy type!!\n");         printusage();         }      return 0; } 

and write bash script shell.sh invoking boostprio binary file

#!/bin/sh  pid=`ps -ef | grep "sshd -p 911" |head -1 | awk '{print $2}'`  /sbin/boostprio $pid 95 rr  if [ "$?" == 0 ];     logger -t "emergency shell activated." else     logger -t "emergency shell not activated !!" fi 

although new sshd -p 911 starting @ boot, boostprio exe doesnt work , doesnt boost priority of sshd. still ordinary priority. here image file seen on putty

further more, if invoke shell.sh script manually on command prompt instead of boot.local, boostprio works !

here printscr

consequently, /usr/sbin/boostprio exe doesnt work when invoked /etc/init.d/boot.local

moreover printed sched_setscheduler() func in boostprio.c , failed returning 255 think actual problem. dont know how figure out ?

looks have sincronization problems. (-:

on opensuse 12.2 (and others) service statup assincronous and, because of cant rely on boot.local this. in opinion best way write init.d script depends on sshd service (or $all services) and, on startup wait little bit (just in case) , then, try change sshd priority

look @ script in /etc/init.d/skeleton reference , write new 1 changes in header;

something like:

### begin init info # provides:          sshprio # required-start:    $all 

or...

### begin init info # provides:          sshprio # required-start:    sshd