/* Set a process to a constant and permanent priority Name: setlinuxpri.c Compile using: gcc -o setlinuxpri setlinuxpri.c chown root setlinuxpri chmod 0500 setlinuxpri Usage: setlinuxpri -p ProcessID -P Priority */ #include #include int setpriority(int which, id_t who, int value); int getopt (ArgumentC, ArgumentV, OptionString); int ArgumentC; char *const ArgumentV [ ]; const char *OptionString; extern int optind; extern int optopt; extern int opterr; extern char * optarg; /* ############################################################# */ int main(int argc, char** argv) { int arg; int ProcessID; int Priority; int out; ProcessID = -1; Priority = 60; while (arg!=EOF) { arg=getopt(argc, argv, "p:P:"); switch(arg) { /* Set the process id number */ case 'p': ProcessID=atoi(optarg); break; /* Set the priority number */ case 'P': Priority=atoi(optarg); /* Set the priority */ break; case '?': exit(usage()); } } if ( ProcessID >= 0 ) { out = setpriority ( PRIO_PROCESS, ProcessID, Priority); } else { printf("setlinuxpri: -p option is required\n"); exit(usage()); } } /* ################################################################ */ /* usage */ int usage() { printf("\nSyntax: setlinuxpri -p ProcessID [-P Priority]\n"); printf(" Maximum Priority = 1\n"); printf(" Default Priority = 60\n"); printf(" Minimum Priority = 254\n"); return(1); }