118 lines
2.3 KiB
C
Executable file
118 lines
2.3 KiB
C
Executable file
/* $Header$ */
|
|
/*
|
|
* (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 */
|
|
|
|
#include <pc_file.h>
|
|
#include <pc_err.h>
|
|
|
|
extern struct file **_extfl;
|
|
extern int _extflc;
|
|
extern struct file *_curfil;
|
|
extern int _pargc;
|
|
extern char **_pargv;
|
|
extern char ***_penviron;
|
|
|
|
extern _cls();
|
|
extern _xcls();
|
|
extern _trp();
|
|
extern int _getpid();
|
|
extern int _creat();
|
|
extern int _open();
|
|
extern int _close();
|
|
extern int _unlink();
|
|
extern long _lseek();
|
|
|
|
static int tmpfil() {
|
|
static char namebuf[] = "/usr/tmp/plf.xxxxx";
|
|
int i; char *p,*q;
|
|
|
|
i = _getpid();
|
|
p = namebuf;
|
|
q = p + 13;
|
|
do
|
|
*q++ = (i & 07) + '0';
|
|
while (i >>= 3);
|
|
*q = '\0';
|
|
if ((i = _creat(p,0644)) < 0)
|
|
if ((i = _creat(p += 4,0644)) < 0)
|
|
if ((i = _creat(p += 5,0644)) < 0)
|
|
goto error;
|
|
if (_close(i) != 0)
|
|
goto error;
|
|
if ((i = _open(p,2)) < 0)
|
|
goto error;
|
|
if (_unlink(p) != 0)
|
|
error: _trp(EREWR);
|
|
return(i);
|
|
}
|
|
|
|
static int initfl(descr,sz,f) int descr; int sz; struct file *f; {
|
|
int i;
|
|
|
|
_curfil = f;
|
|
if (sz == 0) {
|
|
sz++;
|
|
descr |= TXTBIT;
|
|
}
|
|
for (i=0; i<_extflc; i++)
|
|
if (f == _extfl[i])
|
|
break;
|
|
if (i >= _extflc) { /* local file */
|
|
f->fname = "LOCAL";
|
|
if ((descr & WRBIT) == 0 && (f->flags & 0377) == MAGIC) {
|
|
_xcls(f);
|
|
if (_lseek(f->ufd,(long)0,0) == -1)
|
|
_trp(ERESET);
|
|
} else {
|
|
_cls(f);
|
|
f->ufd = tmpfil();
|
|
}
|
|
} else { /* external file */
|
|
if (--i <= 0)
|
|
return(0);
|
|
if (i >= _pargc)
|
|
_trp(EARGC);
|
|
f->fname = _pargv[i];
|
|
_cls(f);
|
|
if ((descr & WRBIT) == 0) {
|
|
if ((f->ufd = _open(f->fname,0)) < 0)
|
|
_trp(ERESET);
|
|
} else {
|
|
if ((f->ufd = _creat(f->fname,0644)) < 0)
|
|
_trp(EREWR);
|
|
}
|
|
}
|
|
f->buflen = (sz>PC_BUFLEN ? sz : PC_BUFLEN-PC_BUFLEN%sz);
|
|
f->size = sz;
|
|
f->ptr = f->bufadr;
|
|
f->flags = descr;
|
|
return(1);
|
|
}
|
|
|
|
_opn(sz,f) int sz; struct file *f; {
|
|
|
|
if (initfl(MAGIC,sz,f))
|
|
f->count = 0;
|
|
}
|
|
|
|
_cre(sz,f) int sz; struct file *f; {
|
|
|
|
if (initfl(WRBIT|EOFBIT|ELNBIT|MAGIC,sz,f))
|
|
f->count = f->buflen;
|
|
}
|