initial population

1 files changed, 631 insertions, 0 deletions

diff --git a/bin/sh/options.c b/bin/sh/options.c
new file mode 100644
index 0000000..d2c3e68
--- /dev/null
+++ b/bin/sh/options.c
@@ -0,0 +1,631 @@
+/*	$NetBSD: options.c,v 1.53 2018/07/13 22:43:44 kre Exp $	*/
+
+/*-
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)options.c	8.2 (Berkeley) 5/4/95";
+#else
+__RCSID("$NetBSD: options.c,v 1.53 2018/07/13 22:43:44 kre Exp $");
+#endif
+#endif /* not lint */
+
+#include <signal.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include "shell.h"
+#define DEFINE_OPTIONS
+#include "options.h"
+#undef DEFINE_OPTIONS
+#include "builtins.h"
+#include "nodes.h"	/* for other header files */
+#include "eval.h"
+#include "jobs.h"
+#include "input.h"
+#include "output.h"
+#include "trap.h"
+#include "var.h"
+#include "memalloc.h"
+#include "error.h"
+#include "mystring.h"
+#include "syntax.h"
+#ifndef SMALL
+#include "myhistedit.h"
+#endif
+#include "show.h"
+
+char *arg0;			/* value of $0 */
+struct shparam shellparam;	/* current positional parameters */
+char **argptr;			/* argument list for builtin commands */
+char *optionarg;		/* set by nextopt (like getopt) */
+char *optptr;			/* used by nextopt */
+
+char *minusc;			/* argument to -c option */
+
+
+STATIC void options(int);
+STATIC void minus_o(char *, int);
+STATIC void setoption(int, int);
+STATIC int getopts(char *, char *, char **, char ***, char **);
+
+
+/*
+ * Process the shell command line arguments.
+ */
+
+void
+procargs(int argc, char **argv)
+{
+	size_t i;
+	int psx;
+
+	argptr = argv;
+	if (argc > 0)
+		argptr++;
+
+	psx = posix;		/* save what we set it to earlier */
+	/*
+	 * option values are mostly boolean 0:off 1:on
+	 * we use 2 (just in this routine) to mean "unknown yet"
+	 */
+	for (i = 0; i < NOPTS; i++)
+		optlist[i].val = 2;
+	posix = psx;		/* restore before processing -o ... */
+
+	options(1);
+
+	if (*argptr == NULL && minusc == NULL)
+		sflag = 1;
+	if (iflag == 2 && sflag == 1 && isatty(0) && isatty(2))
+		iflag = 1;
+	if (iflag == 1 && sflag == 2)
+		iflag = 2;
+	if (mflag == 2)
+		mflag = iflag;
+#ifndef DO_SHAREDVFORK
+	if (usefork == 2)
+		usefork = 1;
+#endif
+#if DEBUG >= 2
+	if (debug == 2)
+		debug = 1;
+#endif
+	/*
+	 * Any options not dealt with as special cases just above,
+	 * and which were not set on the command line, are set to
+	 * their expected default values (mostly "off")
+	 *
+	 * then as each option is initialised, save its setting now
+	 * as its "default" value for future use ("set -o default").
+	 */
+	for (i = 0; i < NOPTS; i++) {
+		if (optlist[i].val == 2)
+			optlist[i].val = optlist[i].dflt;
+		optlist[i].dflt = optlist[i].val;
+	}
+
+	arg0 = argv[0];
+	if (sflag == 0 && minusc == NULL) {
+		commandname = argv[0];
+		arg0 = *argptr++;
+		setinputfile(arg0, 0);
+		commandname = arg0;
+	}
+	/* POSIX 1003.2: first arg after -c cmd is $0, remainder $1... */
+	if (minusc != NULL) {
+		if (argptr == NULL || *argptr == NULL)
+			error("Bad -c option");
+		minusc = *argptr++;
+		if (*argptr != 0)
+			arg0 = *argptr++;
+	}
+
+	shellparam.p = argptr;
+	shellparam.reset = 1;
+	/* assert(shellparam.malloc == 0 && shellparam.nparam == 0); */
+	while (*argptr) {
+		shellparam.nparam++;
+		argptr++;
+	}
+	optschanged();
+}
+
+
+void
+optschanged(void)
+{
+	setinteractive(iflag);
+#ifndef SMALL
+	histedit();
+#endif
+	setjobctl(mflag);
+}
+
+/*
+ * Process shell options.  The global variable argptr contains a pointer
+ * to the argument list; we advance it past the options.
+ */
+
+STATIC void
+options(int cmdline)
+{
+	static char empty[] = "";
+	char *p;
+	int val;
+	int c;
+
+	if (cmdline)
+		minusc = NULL;
+	while ((p = *argptr) != NULL) {
+		argptr++;
+		if ((c = *p++) == '-') {
+			val = 1;
+                        if (p[0] == '\0' || (p[0] == '-' && p[1] == '\0')) {
+                                if (!cmdline) {
+                                        /* "-" means turn off -x and -v */
+                                        if (p[0] == '\0')
+                                                xflag = vflag = 0;
+                                        /* "--" means reset params */
+                                        else if (*argptr == NULL)
+						setparam(argptr);
+                                }
+				break;	  /* "-" or  "--" terminates options */
+			}
+		} else if (c == '+') {
+			val = 0;
+		} else {
+			argptr--;
+			break;
+		}
+		while ((c = *p++) != '\0') {
+			if (val == 1 && c == 'c' && cmdline) {
+				/* command is after shell args*/
+				minusc = empty;
+			} else if (c == 'o') {
+				if (*p != '\0')
+					minus_o(p, val + (cmdline ? val : 0));
+				else if (*argptr)
+					minus_o(*argptr++,
+					    val + (cmdline ? val : 0));
+				else if (!cmdline)
+					minus_o(NULL, val);
+				else
+					error("arg for %co missing", "+-"[val]);
+				break;
+#ifdef DEBUG
+			} else if (c == 'D') {
+				if (*p) {
+					set_debug(p, val);
+					break;
+				} else if (*argptr)
+					set_debug(*argptr++, val);
+				else
+					set_debug("*$", val);
+#endif
+			} else {
+				setoption(c, val);
+			}
+		}
+	}
+}
+
+static void
+set_opt_val(size_t i, int val)
+{
+	size_t j;
+	int flag;
+
+	if (val && (flag = optlist[i].opt_set)) {
+		/* some options (eg vi/emacs) are mutually exclusive */
+		for (j = 0; j < NOPTS; j++)
+		    if (optlist[j].opt_set == flag)
+			optlist[j].val = 0;
+	}
+#ifndef SMALL
+	if (i == _SH_OPT_Xflag)
+		xtracefdsetup(val);
+#endif
+	optlist[i].val = val;
+#ifdef DEBUG
+	if (&optlist[i].val == &debug)
+		opentrace();	/* different "trace" than the -x one... */
+#endif
+}
+
+STATIC void
+minus_o(char *name, int val)
+{
+	size_t i;
+	const char *sep = ": ";
+
+	if (name == NULL) {
+		if (val) {
+			out1str("Current option settings");
+			for (i = 0; i < NOPTS; i++) {
+				if (optlist[i].name == NULL)  {
+					out1fmt("%s%c%c", sep,
+					    "+-"[optlist[i].val],
+					    optlist[i].letter);
+					sep = ", ";
+				}
+			}
+			out1c('\n');
+			for (i = 0; i < NOPTS; i++) {
+				if (optlist[i].name)
+				    out1fmt("%-19s %s\n", optlist[i].name,
+					optlist[i].val ? "on" : "off");
+			}
+		} else {
+			out1str("set -o default");
+			for (i = 0; i < NOPTS; i++) {
+				if (optlist[i].val == optlist[i].dflt)
+					continue;
+				if (optlist[i].name)
+				    out1fmt(" %co %s",
+					"+-"[optlist[i].val], optlist[i].name);
+				else
+				    out1fmt(" %c%c", "+-"[optlist[i].val],
+					optlist[i].letter);
+			}
+			out1c('\n');
+		}
+	} else {
+		if (val == 1 && equal(name, "default")) { /* special case */
+			for (i = 0; i < NOPTS; i++)
+				set_opt_val(i, optlist[i].dflt);
+			return;
+		}
+		if (val)
+			val = 1;
+		for (i = 0; i < NOPTS; i++)
+			if (optlist[i].name && equal(name, optlist[i].name)) {
+				set_opt_val(i, val);
+#ifndef SMALL
+				if (i == _SH_OPT_Xflag)
+					set_opt_val(_SH_OPT_xflag, val);
+#endif
+				return;
+			}
+		error("Illegal option %co %s", "+-"[val], name);
+	}
+}
+
+
+STATIC void
+setoption(int flag, int val)
+{
+	size_t i;
+
+	for (i = 0; i < NOPTS; i++)
+		if (optlist[i].letter == flag) {
+			set_opt_val(i, val);
+#ifndef SMALL
+			if (i == _SH_OPT_Xflag)
+				set_opt_val(_SH_OPT_xflag, val);
+#endif
+			return;
+		}
+	error("Illegal option %c%c", "+-"[val], flag);
+	/* NOTREACHED */
+}
+
+
+
+#ifdef mkinit
+INCLUDE "options.h"
+
+SHELLPROC {
+	int i;
+
+	for (i = 0; optlist[i].name; i++)
+		optlist[i].val = 0;
+	optschanged();
+
+}
+#endif
+
+
+/*
+ * Set the shell parameters.
+ */
+
+void
+setparam(char **argv)
+{
+	char **newparam;
+	char **ap;
+	int nparam;
+
+	for (nparam = 0 ; argv[nparam] ; nparam++)
+		continue;
+	ap = newparam = ckmalloc((nparam + 1) * sizeof *ap);
+	while (*argv) {
+		*ap++ = savestr(*argv++);
+	}
+	*ap = NULL;
+	freeparam(&shellparam);
+	shellparam.malloc = 1;
+	shellparam.nparam = nparam;
+	shellparam.p = newparam;
+	shellparam.optnext = NULL;
+}
+
+
+/*
+ * Free the list of positional parameters.
+ */
+
+void
+freeparam(volatile struct shparam *param)
+{
+	char **ap;
+
+	if (param->malloc) {
+		for (ap = param->p ; *ap ; ap++)
+			ckfree(*ap);
+		ckfree(param->p);
+	}
+}
+
+
+
+/*
+ * The shift builtin command.
+ */
+
+int
+shiftcmd(int argc, char **argv)
+{
+	int n;
+	char **ap1, **ap2;
+
+	if (argc > 2)
+		error("Usage: shift [n]");
+	n = 1;
+	if (argc > 1)
+		n = number(argv[1]);
+	if (n > shellparam.nparam)
+		error("can't shift that many");
+	INTOFF;
+	shellparam.nparam -= n;
+	for (ap1 = shellparam.p ; --n >= 0 ; ap1++) {
+		if (shellparam.malloc)
+			ckfree(*ap1);
+	}
+	ap2 = shellparam.p;
+	while ((*ap2++ = *ap1++) != NULL)
+		continue;
+	shellparam.optnext = NULL;
+	INTON;
+	return 0;
+}
+
+
+
+/*
+ * The set command builtin.
+ */
+
+int
+setcmd(int argc, char **argv)
+{
+	if (argc == 1)
+		return showvars(0, 0, 1, 0);
+	INTOFF;
+	options(0);
+	optschanged();
+	if (*argptr != NULL) {
+		setparam(argptr);
+	}
+	INTON;
+	return 0;
+}
+
+
+void
+getoptsreset(const char *value)
+{
+	/*
+	 * This is just to detect the case where OPTIND=1
+	 * is executed.   Any other string assigned to OPTIND
+	 * is OK, but is not a reset.   No errors, so cannot use number()
+	 */
+	if (is_digit(*value) && strtol(value, NULL, 10) == 1) {
+		shellparam.optnext = NULL;
+		shellparam.reset = 1;
+	}
+}
+
+/*
+ * The getopts builtin.  Shellparam.optnext points to the next argument
+ * to be processed.  Shellparam.optptr points to the next character to
+ * be processed in the current argument.  If shellparam.optnext is NULL,
+ * then it's the first time getopts has been called.
+ */
+
+int
+getoptscmd(int argc, char **argv)
+{
+	char **optbase;
+
+	if (argc < 3)
+		error("usage: getopts optstring var [arg]");
+	else if (argc == 3)
+		optbase = shellparam.p;
+	else
+		optbase = &argv[3];
+
+	if (shellparam.reset == 1) {
+		shellparam.optnext = optbase;
+		shellparam.optptr = NULL;
+		shellparam.reset = 0;
+	}
+
+	return getopts(argv[1], argv[2], optbase, &shellparam.optnext,
+		       &shellparam.optptr);
+}
+
+STATIC int
+getopts(char *optstr, char *optvar, char **optfirst, char ***optnext, char **optpptr)
+{
+	char *p, *q;
+	char c = '?';
+	int done = 0;
+	int ind = 0;
+	int err = 0;
+	char s[12];
+
+	if ((p = *optpptr) == NULL || *p == '\0') {
+		/* Current word is done, advance */
+		if (*optnext == NULL)
+			return 1;
+		p = **optnext;
+		if (p == NULL || *p != '-' || *++p == '\0') {
+atend:
+			ind = *optnext - optfirst + 1;
+			*optnext = NULL;
+			p = NULL;
+			done = 1;
+			goto out;
+		}
+		(*optnext)++;
+		if (p[0] == '-' && p[1] == '\0')	/* check for "--" */
+			goto atend;
+	}
+
+	c = *p++;
+	for (q = optstr; *q != c; ) {
+		if (*q == '\0') {
+			if (optstr[0] == ':') {
+				s[0] = c;
+				s[1] = '\0';
+				err |= setvarsafe("OPTARG", s, 0);
+			} else {
+				outfmt(&errout, "Illegal option -%c\n", c);
+				(void) unsetvar("OPTARG", 0);
+			}
+			c = '?';
+			goto bad;
+		}
+		if (*++q == ':')
+			q++;
+	}
+
+	if (*++q == ':') {
+		if (*p == '\0' && (p = **optnext) == NULL) {
+			if (optstr[0] == ':') {
+				s[0] = c;
+				s[1] = '\0';
+				err |= setvarsafe("OPTARG", s, 0);
+				c = ':';
+			} else {
+				outfmt(&errout, "No arg for -%c option\n", c);
+				(void) unsetvar("OPTARG", 0);
+				c = '?';
+			}
+			goto bad;
+		}
+
+		if (p == **optnext)
+			(*optnext)++;
+		err |= setvarsafe("OPTARG", p, 0);
+		p = NULL;
+	} else
+		err |= setvarsafe("OPTARG", "", 0);
+	ind = *optnext - optfirst + 1;
+	goto out;
+
+bad:
+	ind = 1;
+	*optnext = NULL;
+	p = NULL;
+out:
+	*optpptr = p;
+	fmtstr(s, sizeof(s), "%d", ind);
+	err |= setvarsafe("OPTIND", s, VNOFUNC);
+	s[0] = c;
+	s[1] = '\0';
+	err |= setvarsafe(optvar, s, 0);
+	if (err) {
+		*optnext = NULL;
+		*optpptr = NULL;
+		flushall();
+		exraise(EXERROR);
+	}
+	return done;
+}
+
+/*
+ * XXX - should get rid of.  have all builtins use getopt(3).  the
+ * library getopt must have the BSD extension static variable "optreset"
+ * otherwise it can't be used within the shell safely.
+ *
+ * Standard option processing (a la getopt) for builtin routines.  The
+ * only argument that is passed to nextopt is the option string; the
+ * other arguments are unnecessary.  It return the character, or '\0' on
+ * end of input.
+ */
+
+int
+nextopt(const char *optstring)
+{
+	char *p;
+	const char *q;
+	char c;
+
+	if ((p = optptr) == NULL || *p == '\0') {
+		p = *argptr;
+		if (p == NULL || *p != '-' || *++p == '\0')
+			return '\0';
+		argptr++;
+		if (p[0] == '-' && p[1] == '\0')	/* check for "--" */
+			return '\0';
+	}
+	c = *p++;
+	for (q = optstring ; *q != c ; ) {
+		if (*q == '\0')
+			error("Illegal option -%c", c);
+		if (*++q == ':')
+			q++;
+	}
+	if (*++q == ':') {
+		if (*p == '\0' && (p = *argptr++) == NULL)
+			error("No arg for -%c option", c);
+		optionarg = p;
+		p = NULL;
+	}
+	optptr = p;
+	return c;
+}