From 3089fe69ad43e06cad8776b4aa3efb85a40e8df4 Mon Sep 17 00:00:00 2001 From: June McEnroe Date: Wed, 23 Dec 2020 18:06:21 -0500 Subject: Remove 1sh --- bin/1sh/redir.c | 365 -------------------------------------------------------- 1 file changed, 365 deletions(-) delete mode 100644 bin/1sh/redir.c (limited to 'bin/1sh/redir.c') 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 -/* $FreeBSD: releng/12.1/bin/sh/redir.c 326025 2017-11-20 19:49:47Z pfg $ */ - -#include -#include -#include -#include -#include -#include -#include -#include - -/* - * 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; - } - } -} -- cgit 1.4.1