demos/split.c

   1 #include "cll1.h"
   2
   3 struct Passwd
   4 {
   5  char *username, *home, *shell;
   6  int uid, gid;
   7  list(Passwd);
   8 } *etcpasswd,*passwd;
   9
  10 program
  11 {
  12  char *ptr;
  13  FILE *f;
  14  int col;
  15
  16  parse("/etc/passwd")
  17  {
  18   col=1;
  19   suffix(ptr,_,'\n');
  20   split(ptr,_,':') switch(col++)
  21   {
  22    case 1: create(passwd,Passwd);passwd->username=ptr;break;
  23    case 3: passwd->uid=atoi(ptr);break;
  24    case 4: passwd->gid=atoi(ptr);break;
  25    case 6: passwd->home=ptr;break;
  26    case 7: passwd->shell=ptr;insert(passwd,etcpasswd,sort_by,username);break;
  27   }
  28  }
  29  done;
  30
  31  puts("--------- /etc/passwd sorted by username ---------------");
  32  every(passwd,etcpasswd) printf("#%03d: %s\n",passwd->uid,passwd->username);
  33
  34  puts("--------- /etc/passwd sorted by uid --------------------");
  35  sort(passwd,etcpasswd,order_by,uid);
  36  every(passwd,etcpasswd) printf("#%03d: %s\n",passwd->uid,passwd->username);
  37 }