utils/pf.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3
   4 /*
   5  * This program take a text separated by new line
   6  * and extract specific paragraphs from that
   7  */
   8 int main(int argc,char **argv)
   9 {
  10         int from, to, i;
  11         char buf[1025];
  12
  13         if (argc >= 2) {
  14                 if (sscanf(argv[1],"%d",&from) != 1) {
  15                         fprintf(stderr,"Invalid parameter (from): %s\n",argv[1]);
  16                         exit(1);
  17                 }
  18                 if (argc == 3) {
  19                         if (sscanf(argv[2],"%d",&to) != 1) {
  20                                 fprintf(stderr,"Invalid parameter (to): %s\n",argv[2]);
  21                                 exit(1);
  22                         }
  23                 }
  24                 else
  25                         to = from;
  26         }
  27         else {
  28                 fprintf(stderr,"Syntax: pf <from> [<to>]\n");
  29                 exit(1);
  30         }
  31
  32         i = 0;
  33         while (fgets(buf,1025, stdin) && i <= to) {
  34                 if (i >= from)
  35                         fputs(buf, stdout);
  36                 if (buf[0] == '\n')
  37                         i ++;
  38         }
  39         return 0;
  40 }