minix/lib/libp/arg.c

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2005-04-21 16:53:53 +02:00
/* $Header$ */
/*
* (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
*
* This product is part of the Amsterdam Compiler Kit.
*
* Permission to use, sell, duplicate or disclose this software must be
* obtained in writing. Requests for such permissions may be sent to
*
* Dr. Andrew S. Tanenbaum
* Wiskundig Seminarium
* Vrije Universiteit
* Postbox 7161
* 1007 MC Amsterdam
* The Netherlands
*
*/
/* Author: J.W. Stevenson */
/* function argc:integer; extern; */
/* function argv(i:integer):string; extern; */
/* procedure argshift; extern; */
/* function environ(i:integer):string; extern; */
extern int _pargc;
extern char **_pargv;
extern char ***_penviron;
int argc() {
return(_pargc);
}
char *argv(i) {
if (i >= _pargc)
return(0);
return(_pargv[i]);
}
argshift() {
if (_pargc > 1) {
--_pargc;
_pargv++;
}
}
char *environ(i) {
char **p; char *q;
if (p = *_penviron)
while (q = *p++)
if (i-- < 0)
return(q);
return(0);
}