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- /* $Id$ */
- /*
- * (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 <stdlib.h>
- #include <unistd.h>
- #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 **_penvp;
- extern _cls();
- extern _xcls();
- extern _trp();
- static int tmpfil() {
- static char namebuf[] = "/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 (remove(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;
- }
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