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-rw-r--r--bin/1sh/redir.c365
1 files changed, 0 insertions, 365 deletions
diff --git a/bin/1sh/redir.c b/bin/1sh/redir.c
deleted file mode 100644
index f8fd9324..00000000
--- a/bin/1sh/redir.c
+++ /dev/null
@@ -1,365 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-3-Clause
- *
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)redir.c	8.2 (Berkeley) 5/4/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-/* $FreeBSD: releng/12.1/bin/sh/redir.c 326025 2017-11-20 19:49:47Z pfg $ */
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <signal.h>
-#include <string.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <unistd.h>
-#include <stdlib.h>
-
-/*
- * Code for dealing with input/output redirection.
- */
-
-#include "shell.h"
-#include "nodes.h"
-#include "jobs.h"
-#include "expand.h"
-#include "redir.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "options.h"
-
-
-#define EMPTY -2		/* marks an unused slot in redirtab */
-#define CLOSED -1		/* fd was not open before redir */
-
-
-struct redirtab {
-	struct redirtab *next;
-	int renamed[10];
-	int fd0_redirected;
-	unsigned int empty_redirs;
-};
-
-
-static struct redirtab *redirlist;
-
-/*
- * We keep track of whether or not fd0 has been redirected.  This is for
- * background commands, where we want to redirect fd0 to /dev/null only
- * if it hasn't already been redirected.
-*/
-static int fd0_redirected = 0;
-
-/* Number of redirtabs that have not been allocated. */
-static unsigned int empty_redirs = 0;
-
-static void openredirect(union node *, char[10 ]);
-static int openhere(union node *);
-
-
-/*
- * Process a list of redirection commands.  If the REDIR_PUSH flag is set,
- * old file descriptors are stashed away so that the redirection can be
- * undone by calling popredir.  If the REDIR_BACKQ flag is set, then the
- * standard output, and the standard error if it becomes a duplicate of
- * stdout, is saved in memory.
-*
- * We suppress interrupts so that we won't leave open file
- * descriptors around.  Because the signal handler remains
- * installed and we do not use system call restart, interrupts
- * will still abort blocking opens such as fifos (they will fail
- * with EINTR). There is, however, a race condition if an interrupt
- * arrives after INTOFF and before open blocks.
- */
-
-void
-redirect(union node *redir, int flags)
-{
-	union node *n;
-	struct redirtab *sv = NULL;
-	int i;
-	int fd;
-	char memory[10];	/* file descriptors to write to memory */
-
-	INTOFF;
-	for (i = 10 ; --i >= 0 ; )
-		memory[i] = 0;
-	memory[1] = flags & REDIR_BACKQ;
-	if (flags & REDIR_PUSH) {
-		empty_redirs++;
-		if (redir != NULL) {
-			sv = ckmalloc(sizeof (struct redirtab));
-			for (i = 0 ; i < 10 ; i++)
-				sv->renamed[i] = EMPTY;
-			sv->fd0_redirected = fd0_redirected;
-			sv->empty_redirs = empty_redirs - 1;
-			sv->next = redirlist;
-			redirlist = sv;
-			empty_redirs = 0;
-		}
-	}
-	for (n = redir ; n ; n = n->nfile.next) {
-		fd = n->nfile.fd;
-		if (fd == 0)
-			fd0_redirected = 1;
-		if ((n->nfile.type == NTOFD || n->nfile.type == NFROMFD) &&
-		    n->ndup.dupfd == fd)
-			continue; /* redirect from/to same file descriptor */
-
-		if ((flags & REDIR_PUSH) && sv->renamed[fd] == EMPTY) {
-			INTOFF;
-			if ((i = fcntl(fd, F_DUPFD_CLOEXEC, 10)) == -1) {
-				switch (errno) {
-				case EBADF:
-					i = CLOSED;
-					break;
-				default:
-					INTON;
-					error("%d: %s", fd, strerror(errno));
-					break;
-				}
-			}
-			sv->renamed[fd] = i;
-			INTON;
-		}
-		openredirect(n, memory);
-		INTON;
-		INTOFF;
-	}
-	if (memory[1])
-		out1 = &memout;
-	if (memory[2])
-		out2 = &memout;
-	INTON;
-}
-
-
-static void
-openredirect(union node *redir, char memory[10])
-{
-	struct stat sb;
-	int fd = redir->nfile.fd;
-	const char *fname;
-	int f;
-	int e;
-
-	memory[fd] = 0;
-	switch (redir->nfile.type) {
-	case NFROM:
-		fname = redir->nfile.expfname;
-		if ((f = open(fname, O_RDONLY)) < 0)
-			error("cannot open %s: %s", fname, strerror(errno));
-		break;
-	case NFROMTO:
-		fname = redir->nfile.expfname;
-		if ((f = open(fname, O_RDWR|O_CREAT, 0666)) < 0)
-			error("cannot create %s: %s", fname, strerror(errno));
-		break;
-	case NTO:
-		if (Cflag) {
-			fname = redir->nfile.expfname;
-			if (stat(fname, &sb) == -1) {
-				if ((f = open(fname, O_WRONLY|O_CREAT|O_EXCL, 0666)) < 0)
-					error("cannot create %s: %s", fname, strerror(errno));
-			} else if (!S_ISREG(sb.st_mode)) {
-				if ((f = open(fname, O_WRONLY, 0666)) < 0)
-					error("cannot create %s: %s", fname, strerror(errno));
-				if (fstat(f, &sb) != -1 && S_ISREG(sb.st_mode)) {
-					close(f);
-					error("cannot create %s: %s", fname,
-					    strerror(EEXIST));
-				}
-			} else
-				error("cannot create %s: %s", fname,
-				    strerror(EEXIST));
-			break;
-		}
-		/* FALLTHROUGH */
-	case NCLOBBER:
-		fname = redir->nfile.expfname;
-		if ((f = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) < 0)
-			error("cannot create %s: %s", fname, strerror(errno));
-		break;
-	case NAPPEND:
-		fname = redir->nfile.expfname;
-		if ((f = open(fname, O_WRONLY|O_CREAT|O_APPEND, 0666)) < 0)
-			error("cannot create %s: %s", fname, strerror(errno));
-		break;
-	case NTOFD:
-	case NFROMFD:
-		if (redir->ndup.dupfd >= 0) {	/* if not ">&-" */
-			if (memory[redir->ndup.dupfd])
-				memory[fd] = 1;
-			else {
-				if (dup2(redir->ndup.dupfd, fd) < 0)
-					error("%d: %s", redir->ndup.dupfd,
-							strerror(errno));
-			}
-		} else {
-			close(fd);
-		}
-		return;
-	case NHERE:
-	case NXHERE:
-		f = openhere(redir);
-		break;
-	default:
-		abort();
-	}
-	if (f != fd) {
-		if (dup2(f, fd) == -1) {
-			e = errno;
-			close(f);
-			error("%d: %s", fd, strerror(e));
-		}
-		close(f);
-	}
-}
-
-
-/*
- * Handle here documents.  Normally we fork off a process to write the
- * data to a pipe.  If the document is short, we can stuff the data in
- * the pipe without forking.
- */
-
-static int
-openhere(union node *redir)
-{
-	const char *p;
-	int pip[2];
-	size_t len = 0;
-	int flags;
-	ssize_t written = 0;
-
-	if (pipe(pip) < 0)
-		error("Pipe call failed: %s", strerror(errno));
-
-	if (redir->type == NXHERE)
-		p = redir->nhere.expdoc;
-	else
-		p = redir->nhere.doc->narg.text;
-	len = strlen(p);
-	if (len == 0)
-		goto out;
-	flags = fcntl(pip[1], F_GETFL, 0);
-	if (flags != -1 && fcntl(pip[1], F_SETFL, flags | O_NONBLOCK) != -1) {
-		written = write(pip[1], p, len);
-		if (written < 0)
-			written = 0;
-		if ((size_t)written == len)
-			goto out;
-		fcntl(pip[1], F_SETFL, flags);
-	}
-
-	if (forkshell((struct job *)NULL, (union node *)NULL, FORK_NOJOB) == 0) {
-		close(pip[0]);
-		signal(SIGINT, SIG_IGN);
-		signal(SIGQUIT, SIG_IGN);
-		signal(SIGHUP, SIG_IGN);
-		signal(SIGTSTP, SIG_IGN);
-		signal(SIGPIPE, SIG_DFL);
-		xwrite(pip[1], p + written, len - written);
-		_exit(0);
-	}
-out:
-	close(pip[1]);
-	return pip[0];
-}
-
-
-
-/*
- * Undo the effects of the last redirection.
- */
-
-void
-popredir(void)
-{
-	struct redirtab *rp = redirlist;
-	int i;
-
-	INTOFF;
-	if (empty_redirs > 0) {
-		empty_redirs--;
-		INTON;
-		return;
-	}
-	for (i = 0 ; i < 10 ; i++) {
-		if (rp->renamed[i] != EMPTY) {
-			if (rp->renamed[i] >= 0) {
-				dup2(rp->renamed[i], i);
-				close(rp->renamed[i]);
-			} else {
-				close(i);
-			}
-		}
-	}
-	fd0_redirected = rp->fd0_redirected;
-	empty_redirs = rp->empty_redirs;
-	redirlist = rp->next;
-	ckfree(rp);
-	INTON;
-}
-
-/* Return true if fd 0 has already been redirected at least once.  */
-int
-fd0_redirected_p(void)
-{
-        return fd0_redirected != 0;
-}
-
-/*
- * Discard all saved file descriptors.
- */
-
-void
-clearredir(void)
-{
-	struct redirtab *rp;
-	int i;
-
-	for (rp = redirlist ; rp ; rp = rp->next) {
-		for (i = 0 ; i < 10 ; i++) {
-			if (rp->renamed[i] >= 0) {
-				close(rp->renamed[i]);
-			}
-			rp->renamed[i] = EMPTY;
-		}
-	}
-}
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-01 00:02:24 +0000