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      1  1.29       kre /*	$NetBSD: redir.h,v 1.29 2024/11/11 22:57:42 kre Exp $	*/
      2   1.8       cgd 
      3   1.1       cgd /*-
      4   1.6       jtc  * Copyright (c) 1991, 1993
      5   1.6       jtc  *	The Regents of the University of California.  All rights reserved.
      6   1.1       cgd  *
      7   1.1       cgd  * This code is derived from software contributed to Berkeley by
      8   1.1       cgd  * Kenneth Almquist.
      9   1.1       cgd  *
     10   1.1       cgd  * Redistribution and use in source and binary forms, with or without
     11   1.1       cgd  * modification, are permitted provided that the following conditions
     12   1.1       cgd  * are met:
     13   1.1       cgd  * 1. Redistributions of source code must retain the above copyright
     14   1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     15   1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     16   1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     17   1.1       cgd  *    documentation and/or other materials provided with the distribution.
     18  1.15       agc  * 3. Neither the name of the University nor the names of its contributors
     19   1.1       cgd  *    may be used to endorse or promote products derived from this software
     20   1.1       cgd  *    without specific prior written permission.
     21   1.1       cgd  *
     22   1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23   1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24   1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25   1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26   1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27   1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28   1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29   1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30   1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31   1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32   1.1       cgd  * SUCH DAMAGE.
     33   1.1       cgd  *
     34   1.9  christos  *	@(#)redir.h	8.2 (Berkeley) 5/4/95
     35   1.1       cgd  */
     36   1.1       cgd 
     37   1.1       cgd /* flags passed to redirect */
     38  1.18  christos #define REDIR_PUSH  0x01	/* save previous values of file descriptors */
     39  1.18  christos #define REDIR_BACKQ 0x02	/* save the command output in memory */
     40  1.18  christos #define REDIR_VFORK 0x04	/* running under vfork(2), be careful */
     41  1.18  christos #define REDIR_KEEP  0x08	/* don't close-on-exec */
     42   1.1       cgd 
     43  1.29       kre /* flags passed to popredir and free_rl */
     44  1.29       kre #define POPREDIR_DISCARD	0	/* just abandon everything */
     45  1.29       kre #define POPREDIR_UNDO		1	/* undo saved redirects */
     46  1.29       kre #define POPREDIR_PERMANENT	2	/* keep renamed fd, close saving fd */
     47  1.29       kre 
     48   1.1       cgd union node;
     49  1.14  christos void redirect(union node *, int);
     50  1.29       kre void popredir(int);
     51  1.14  christos int fd0_redirected_p(void);
     52  1.14  christos void clearredir(int);
     53  1.19  christos int movefd(int, int);
     54  1.19  christos int to_upper_fd(int);
     55  1.23       kre void register_sh_fd(int, void (*)(int, int));
     56  1.23       kre void sh_close(int);
     57  1.24       kre struct output;
     58  1.24       kre int outredir(struct output *, union node *, int);
     59  1.22       kre 
     60  1.25     joerg extern int max_user_fd;		/* highest fd used by user */
     61  1.26       kre extern long user_fd_limit;	/* highest possible user fd */
     62