lib/ack/libp/popen.c

   1 /* $Header$ */
   2 /*
   3  * (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
   4  *
   5  *          This product is part of the Amsterdam Compiler Kit.
   6  *
   7  * Permission to use, sell, duplicate or disclose this software must be
   8  * obtained in writing. Requests for such permissions may be sent to
   9  *
  10  *      Dr. Andrew S. Tanenbaum
  11  *      Wiskundig Seminarium
  12  *      Vrije Universiteit
  13  *      Postbox 7161
  14  *      1007 MC Amsterdam
  15  *      The Netherlands
  16  *
  17  */
  18
  19 /* Author: J.W. Stevenson */
  20
  21 #include        <pc_file.h>
  22 #include        <pc_err.h>
  23
  24 extern          _cls();
  25 extern          _trp();
  26 extern int      _open();
  27
  28 /* procedure popen(var f:text; s:string); */
  29
  30 popen(f,s) struct file *f; char *s; {
  31
  32         _cls(f);        /* initializes _curfil */
  33         f->ptr = f->bufadr;
  34         f->flags = TXTBIT|MAGIC;
  35         f->fname = s;
  36         f->size = 1;
  37         f->count = 0;
  38         f->buflen = PC_BUFLEN;
  39         if ((f->ufd = _open(s,0)) < 0)
  40                 _trp(ERESET);
  41 }