Remove 1sh

1 files changed, 0 insertions, 520 deletions

diff --git a/bin/1sh/input.c b/bin/1sh/input.c
deleted file mode 100644
index 37f689a5..00000000
--- a/bin/1sh/input.c
+++ /dev/null
@@ -1,520 +0,0 @@
-/*-
- * 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[] = "@(#)input.c	8.3 (Berkeley) 6/9/95";
-#endif
-#endif /* not lint */
-#include <sys/cdefs.h>
-/* $FreeBSD: releng/12.1/bin/sh/input.c 314436 2017-02-28 23:42:47Z imp $ */
-
-#include <stdio.h>	/* defines BUFSIZ */
-#include <fcntl.h>
-#include <errno.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <string.h>
-
-/*
- * This file implements the input routines used by the parser.
- */
-
-#include "shell.h"
-#include "redir.h"
-#include "syntax.h"
-#include "input.h"
-#include "output.h"
-#include "options.h"
-#include "memalloc.h"
-#include "error.h"
-#include "alias.h"
-#include "parser.h"
-#include "myhistedit.h"
-#include "trap.h"
-
-#define EOF_NLEFT -99		/* value of parsenleft when EOF pushed back */
-
-struct strpush {
-	struct strpush *prev;	/* preceding string on stack */
-	const char *prevstring;
-	int prevnleft;
-	int prevlleft;
-	struct alias *ap;	/* if push was associated with an alias */
-};
-
-/*
- * The parsefile structure pointed to by the global variable parsefile
- * contains information about the current file being read.
- */
-
-struct parsefile {
-	struct parsefile *prev;	/* preceding file on stack */
-	int linno;		/* current line */
-	int fd;			/* file descriptor (or -1 if string) */
-	int nleft;		/* number of chars left in this line */
-	int lleft;		/* number of lines left in this buffer */
-	const char *nextc;	/* next char in buffer */
-	char *buf;		/* input buffer */
-	struct strpush *strpush; /* for pushing strings at this level */
-	struct strpush basestrpush; /* so pushing one is fast */
-};
-
-
-int plinno = 1;			/* input line number */
-int parsenleft;			/* copy of parsefile->nleft */
-static int parselleft;		/* copy of parsefile->lleft */
-const char *parsenextc;		/* copy of parsefile->nextc */
-static char basebuf[BUFSIZ + 1];/* buffer for top level input file */
-static struct parsefile basepf = {	/* top level input file */
-	.nextc = basebuf,
-	.buf = basebuf
-};
-static struct parsefile *parsefile = &basepf;	/* current input file */
-int whichprompt;		/* 1 == PS1, 2 == PS2 */
-
-EditLine *el;			/* cookie for editline package */
-
-static void pushfile(void);
-static int preadfd(void);
-static void popstring(void);
-
-void
-resetinput(void)
-{
-	popallfiles();
-	parselleft = parsenleft = 0;	/* clear input buffer */
-}
-
-
-
-/*
- * Read a character from the script, returning PEOF on end of file.
- * Nul characters in the input are silently discarded.
- */
-
-int
-pgetc(void)
-{
-	return pgetc_macro();
-}
-
-
-static int
-preadfd(void)
-{
-	int nr;
-	parsenextc = parsefile->buf;
-
-retry:
-#ifndef NO_HISTORY
-	if (parsefile->fd == 0 && el) {
-		static const char *rl_cp;
-		static int el_len;
-
-		if (rl_cp == NULL) {
-			el_resize(el);
-			rl_cp = el_gets(el, &el_len);
-		}
-		if (rl_cp == NULL)
-			nr = el_len == 0 ? 0 : -1;
-		else {
-			nr = el_len;
-			if (nr > BUFSIZ)
-				nr = BUFSIZ;
-			memcpy(parsefile->buf, rl_cp, nr);
-			if (nr != el_len) {
-				el_len -= nr;
-				rl_cp += nr;
-			} else
-				rl_cp = NULL;
-		}
-	} else
-#endif
-		nr = read(parsefile->fd, parsefile->buf, BUFSIZ);
-
-	if (nr <= 0) {
-                if (nr < 0) {
-                        if (errno == EINTR)
-                                goto retry;
-                        if (parsefile->fd == 0 && errno == EWOULDBLOCK) {
-                                int flags = fcntl(0, F_GETFL, 0);
-                                if (flags >= 0 && flags & O_NONBLOCK) {
-                                        flags &=~ O_NONBLOCK;
-                                        if (fcntl(0, F_SETFL, flags) >= 0) {
-						out2fmt_flush("sh: turning off NDELAY mode\n");
-                                                goto retry;
-                                        }
-                                }
-                        }
-                }
-                nr = -1;
-	}
-	return nr;
-}
-
-/*
- * Refill the input buffer and return the next input character:
- *
- * 1) If a string was pushed back on the input, pop it;
- * 2) If an EOF was pushed back (parsenleft == EOF_NLEFT) or we are reading
- *    from a string so we can't refill the buffer, return EOF.
- * 3) If there is more in this buffer, use it else call read to fill it.
- * 4) Process input up to the next newline, deleting nul characters.
- */
-
-int
-preadbuffer(void)
-{
-	char *p, *q, *r, *end;
-	char savec;
-
-	while (parsefile->strpush) {
-		/*
-		 * Add a space to the end of an alias to ensure that the
-		 * alias remains in use while parsing its last word.
-		 * This avoids alias recursions.
-		 */
-		if (parsenleft == -1 && parsefile->strpush->ap != NULL)
-			return ' ';
-		popstring();
-		if (--parsenleft >= 0)
-			return (*parsenextc++);
-	}
-	if (parsenleft == EOF_NLEFT || parsefile->buf == NULL)
-		return PEOF;
-
-again:
-	if (parselleft <= 0) {
-		if ((parselleft = preadfd()) == -1) {
-			parselleft = parsenleft = EOF_NLEFT;
-			return PEOF;
-		}
-	}
-
-	p = parsefile->buf + (parsenextc - parsefile->buf);
-	end = p + parselleft;
-	*end = '\0';
-	q = strchr(p, '\n');
-	if (!q) q = strchr(p, '\0');
-	if (q != end && *q == '\0') {
-		/* delete nul characters */
-		for (r = q; q != end; q++) {
-			if (*q != '\0')
-				*r++ = *q;
-		}
-		parselleft -= end - r;
-		if (parselleft == 0)
-			goto again;
-		end = p + parselleft;
-		*end = '\0';
-		q = strchr(p, '\n');
-		if (!q) q = strchr(p, '\0');
-	}
-	if (q == end) {
-		parsenleft = parselleft;
-		parselleft = 0;
-	} else /* *q == '\n' */ {
-		q++;
-		parsenleft = q - parsenextc;
-		parselleft -= parsenleft;
-	}
-	parsenleft--;
-
-	savec = *q;
-	*q = '\0';
-
-#ifndef NO_HISTORY
-	if (parsefile->fd == 0 && hist &&
-	    parsenextc[strspn(parsenextc, " \t\n")] != '\0') {
-		HistEvent he;
-		INTOFF;
-		history(hist, &he, whichprompt == 1 ? H_ENTER : H_ADD,
-		    parsenextc);
-		INTON;
-	}
-#endif
-
-	if (vflag) {
-		out2str(parsenextc);
-		flushout(out2);
-	}
-
-	*q = savec;
-
-	return *parsenextc++;
-}
-
-/*
- * Returns if we are certain we are at EOF. Does not cause any more input
- * to be read from the outside world.
- */
-
-int
-preadateof(void)
-{
-	if (parsenleft > 0)
-		return 0;
-	if (parsefile->strpush)
-		return 0;
-	if (parsenleft == EOF_NLEFT || parsefile->buf == NULL)
-		return 1;
-	return 0;
-}
-
-/*
- * Undo the last call to pgetc.  Only one character may be pushed back.
- * PEOF may be pushed back.
- */
-
-void
-pungetc(void)
-{
-	parsenleft++;
-	parsenextc--;
-}
-
-/*
- * Push a string back onto the input at this current parsefile level.
- * We handle aliases this way.
- */
-void
-pushstring(const char *s, int len, struct alias *ap)
-{
-	struct strpush *sp;
-
-	INTOFF;
-/*out2fmt_flush("*** calling pushstring: %s, %d\n", s, len);*/
-	if (parsefile->strpush) {
-		sp = ckmalloc(sizeof (struct strpush));
-		sp->prev = parsefile->strpush;
-		parsefile->strpush = sp;
-	} else
-		sp = parsefile->strpush = &(parsefile->basestrpush);
-	sp->prevstring = parsenextc;
-	sp->prevnleft = parsenleft;
-	sp->prevlleft = parselleft;
-	sp->ap = ap;
-	if (ap)
-		ap->flag |= ALIASINUSE;
-	parsenextc = s;
-	parsenleft = len;
-	INTON;
-}
-
-static void
-popstring(void)
-{
-	struct strpush *sp = parsefile->strpush;
-
-	INTOFF;
-	if (sp->ap) {
-		if (parsenextc != sp->ap->val &&
-		    (parsenextc[-1] == ' ' || parsenextc[-1] == '\t'))
-			forcealias();
-		sp->ap->flag &= ~ALIASINUSE;
-	}
-	parsenextc = sp->prevstring;
-	parsenleft = sp->prevnleft;
-	parselleft = sp->prevlleft;
-/*out2fmt_flush("*** calling popstring: restoring to '%s'\n", parsenextc);*/
-	parsefile->strpush = sp->prev;
-	if (sp != &(parsefile->basestrpush))
-		ckfree(sp);
-	INTON;
-}
-
-/*
- * Set the input to take input from a file.  If push is set, push the
- * old input onto the stack first.
- */
-
-void
-setinputfile(const char *fname, int push)
-{
-	int fd;
-	int fd2;
-
-	INTOFF;
-	if ((fd = open(fname, O_RDONLY | O_CLOEXEC)) < 0)
-		error("cannot open %s: %s", fname, strerror(errno));
-	if (fd < 10) {
-		fd2 = fcntl(fd, F_DUPFD_CLOEXEC, 10);
-		close(fd);
-		if (fd2 < 0)
-			error("Out of file descriptors");
-		fd = fd2;
-	}
-	setinputfd(fd, push);
-	INTON;
-}
-
-
-/*
- * Like setinputfile, but takes an open file descriptor (which should have
- * its FD_CLOEXEC flag already set).  Call this with interrupts off.
- */
-
-void
-setinputfd(int fd, int push)
-{
-	if (push) {
-		pushfile();
-		parsefile->buf = ckmalloc(BUFSIZ + 1);
-	}
-	if (parsefile->fd > 0)
-		close(parsefile->fd);
-	parsefile->fd = fd;
-	if (parsefile->buf == NULL)
-		parsefile->buf = ckmalloc(BUFSIZ + 1);
-	parselleft = parsenleft = 0;
-	plinno = 1;
-}
-
-
-/*
- * Like setinputfile, but takes input from a string.
- */
-
-void
-setinputstring(const char *string, int push)
-{
-	INTOFF;
-	if (push)
-		pushfile();
-	parsenextc = string;
-	parselleft = parsenleft = strlen(string);
-	parsefile->buf = NULL;
-	plinno = 1;
-	INTON;
-}
-
-
-
-/*
- * To handle the "." command, a stack of input files is used.  Pushfile
- * adds a new entry to the stack and popfile restores the previous level.
- */
-
-static void
-pushfile(void)
-{
-	struct parsefile *pf;
-
-	parsefile->nleft = parsenleft;
-	parsefile->lleft = parselleft;
-	parsefile->nextc = parsenextc;
-	parsefile->linno = plinno;
-	pf = (struct parsefile *)ckmalloc(sizeof (struct parsefile));
-	pf->prev = parsefile;
-	pf->fd = -1;
-	pf->strpush = NULL;
-	pf->basestrpush.prev = NULL;
-	parsefile = pf;
-}
-
-
-void
-popfile(void)
-{
-	struct parsefile *pf = parsefile;
-
-	INTOFF;
-	if (pf->fd >= 0)
-		close(pf->fd);
-	if (pf->buf)
-		ckfree(pf->buf);
-	while (pf->strpush)
-		popstring();
-	parsefile = pf->prev;
-	ckfree(pf);
-	parsenleft = parsefile->nleft;
-	parselleft = parsefile->lleft;
-	parsenextc = parsefile->nextc;
-	plinno = parsefile->linno;
-	INTON;
-}
-
-
-/*
- * Return current file (to go back to it later using popfilesupto()).
- */
-
-struct parsefile *
-getcurrentfile(void)
-{
-	return parsefile;
-}
-
-
-/*
- * Pop files until the given file is on top again. Useful for regular
- * builtins that read shell commands from files or strings.
- * If the given file is not an active file, an error is raised.
- */
-
-void
-popfilesupto(struct parsefile *file)
-{
-	while (parsefile != file && parsefile != &basepf)
-		popfile();
-	if (parsefile != file)
-		error("popfilesupto() misused");
-}
-
-/*
- * Return to top level.
- */
-
-void
-popallfiles(void)
-{
-	while (parsefile != &basepf)
-		popfile();
-}
-
-
-
-/*
- * Close the file(s) that the shell is reading commands from.  Called
- * after a fork is done.
- */
-
-void
-closescript(void)
-{
-	popallfiles();
-	if (parsefile->fd > 0) {
-		close(parsefile->fd);
-		parsefile->fd = 0;
-	}
-}