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/*$Id: errno.c,v 1.3 2008/02/01 00:14:56 - - $CahernColin Ahern*/#include <stdio.h>#include <stdlib.h>#include <string.h>static void exit1(int a){   printf("errno(%d) = \"%s\"\n",a,strerror(a));}int main(int argc, char **argv){   int count1,count2;   int test,exit;   int error;   if(argc==1) {      printf("useage: errno [-a] [-e exitvar] [desired errno]\n");      return EXIT_SUCCESS;   }   while((test = getopt(argc, argv, "ae:")) != EOF){      switch(test){         case 'a':            for(count1=0;count1<151;count1++){               printf("Code %d = %s\n",count1,strerror(count1));            }            break;         case 'e':            error=strtol(optarg,NULL,10);            printf("Code %d returns %s\n",error,strerror(error));            break;      }   }   for(count2=1;count2<argc;count2++){      exit=strtol(argv[count2],NULL,10);      printf("Code %d is exit status %s\n",exit,strerror(exit));   }   exit1(exit);   return exit;}