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-rw-r--r--bin/sh/options.c594
1 files changed, 594 insertions, 0 deletions
diff --git a/bin/sh/options.c b/bin/sh/options.c
new file mode 100644
index 000000000000..73d79ca9a74f
--- /dev/null
+++ b/bin/sh/options.c
@@ -0,0 +1,594 @@
+/*-
+ * 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[] = "@(#)options.c 8.2 (Berkeley) 5/4/95";
+#endif
+#endif /* not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <signal.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include "shell.h"
+#define DEFINE_OPTIONS
+#include "options.h"
+#undef DEFINE_OPTIONS
+#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 "builtins.h"
+#ifndef NO_HISTORY
+#include "myhistedit.h"
+#endif
+
+char *arg0; /* value of $0 */
+struct shparam shellparam; /* current positional parameters */
+char **argptr; /* argument list for builtin commands */
+char *shoptarg; /* set by nextopt (like getopt) */
+char *nextopt_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 void setoptionbyindex(int, int);
+static void setparam(int, char **);
+static int getopts(char *, char *, char **, char ***, char **);
+
+
+/*
+ * Process the shell command line arguments.
+ */
+
+void
+procargs(int argc, char **argv)
+{
+ int i;
+ char *scriptname;
+
+ argptr = argv;
+ if (argc > 0)
+ argptr++;
+ for (i = 0; i < NOPTS; i++)
+ optval[i] = 2;
+ privileged = (getuid() != geteuid() || getgid() != getegid());
+ options(1);
+ if (*argptr == NULL && minusc == NULL)
+ sflag = 1;
+ if (iflag != 0 && sflag == 1 && isatty(0) && isatty(1)) {
+ iflag = 1;
+ if (Eflag == 2)
+ Eflag = 1;
+ }
+ if (mflag == 2)
+ mflag = iflag;
+ for (i = 0; i < NOPTS; i++)
+ if (optval[i] == 2)
+ optval[i] = 0;
+ arg0 = argv[0];
+ if (sflag == 0 && minusc == NULL) {
+ scriptname = *argptr++;
+ setinputfile(scriptname, 0);
+ commandname = arg0 = scriptname;
+ }
+ /* POSIX 1003.2: first arg after -c cmd is $0, remainder $1... */
+ if (argptr && minusc && *argptr)
+ 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();
+#ifndef NO_HISTORY
+ histedit();
+#endif
+ setjobctl(mflag);
+}
+
+/*
+ * Process shell options. The global variable argptr contains a pointer
+ * to the argument list; we advance it past the options.
+ * If cmdline is true, process the shell's argv; otherwise, process arguments
+ * to the set special builtin.
+ */
+
+static void
+options(int cmdline)
+{
+ char *kp, *p;
+ int val;
+ int c;
+
+ if (cmdline)
+ minusc = NULL;
+ while ((p = *argptr) != NULL) {
+ argptr++;
+ if ((c = *p++) == '-') {
+ val = 1;
+ /* A "-" or "--" terminates options */
+ if (p[0] == '\0')
+ goto end_options1;
+ if (p[0] == '-' && p[1] == '\0')
+ goto end_options2;
+ /**
+ * For the benefit of `#!' lines in shell scripts,
+ * treat a string of '-- *#.*' the same as '--'.
+ * This is needed so that a script starting with:
+ * #!/bin/sh -- # -*- perl -*-
+ * will continue to work after a change is made to
+ * kern/imgact_shell.c to NOT token-ize the options
+ * specified on a '#!' line. A bit of a kludge,
+ * but that trick is recommended in documentation
+ * for some scripting languages, and we might as
+ * well continue to support it.
+ */
+ if (p[0] == '-') {
+ kp = p + 1;
+ while (*kp == ' ' || *kp == '\t')
+ kp++;
+ if (*kp == '#' || *kp == '\0')
+ goto end_options2;
+ }
+ } else if (c == '+') {
+ val = 0;
+ } else {
+ argptr--;
+ break;
+ }
+ while ((c = *p++) != '\0') {
+ if (c == 'c' && cmdline) {
+ char *q;
+
+ q = *argptr++;
+ if (q == NULL || minusc != NULL)
+ error("Bad -c option");
+ minusc = q;
+ } else if (c == 'o') {
+ minus_o(*argptr, val);
+ if (*argptr)
+ argptr++;
+ } else
+ setoption(c, val);
+ }
+ }
+ return;
+
+ /* When processing `set', a single "-" means turn off -x and -v */
+end_options1:
+ if (!cmdline) {
+ xflag = vflag = 0;
+ return;
+ }
+
+ /*
+ * When processing `set', a "--" means the remaining arguments
+ * replace the positional parameters in the active shell. If
+ * there are no remaining options, then all the positional
+ * parameters are cleared (equivalent to doing ``shift $#'').
+ */
+end_options2:
+ if (!cmdline) {
+ if (*argptr == NULL)
+ setparam(0, argptr);
+ return;
+ }
+
+ /*
+ * At this point we are processing options given to 'sh' on a command
+ * line. If an end-of-options marker ("-" or "--") is followed by an
+ * arg of "#", then skip over all remaining arguments. Some scripting
+ * languages (e.g.: perl) document that /bin/sh will implement this
+ * behavior, and they recommend that users take advantage of it to
+ * solve certain issues that can come up when writing a perl script.
+ * Yes, this feature is in /bin/sh to help users write perl scripts.
+ */
+ p = *argptr;
+ if (p != NULL && p[0] == '#' && p[1] == '\0') {
+ while (*argptr != NULL)
+ argptr++;
+ /* We need to keep the final argument */
+ argptr--;
+ }
+}
+
+static void
+minus_o(char *name, int val)
+{
+ int i;
+ const unsigned char *on;
+ size_t len;
+
+ if (name == NULL) {
+ if (val) {
+ /* "Pretty" output. */
+ out1str("Current option settings\n");
+ for (i = 0, on = optname; i < NOPTS; i++, on += *on + 1)
+ out1fmt("%-16.*s%s\n", *on, on + 1,
+ optval[i] ? "on" : "off");
+ } else {
+ /* Output suitable for re-input to shell. */
+ for (i = 0, on = optname; i < NOPTS; i++, on += *on + 1)
+ out1fmt("%s %co %.*s%s",
+ i % 6 == 0 ? "set" : "",
+ optval[i] ? '-' : '+',
+ *on, on + 1,
+ i % 6 == 5 || i == NOPTS - 1 ? "\n" : "");
+ }
+ } else {
+ len = strlen(name);
+ for (i = 0, on = optname; i < NOPTS; i++, on += *on + 1)
+ if (*on == len && memcmp(on + 1, name, len) == 0) {
+ setoptionbyindex(i, val);
+ return;
+ }
+ error("Illegal option -o %s", name);
+ }
+}
+
+
+static void
+setoptionbyindex(int idx, int val)
+{
+ if (&optval[idx] == &privileged && !val && privileged) {
+ if (setgid(getgid()) == -1)
+ error("setgid");
+ if (setuid(getuid()) == -1)
+ error("setuid");
+ }
+ optval[idx] = val;
+ if (val) {
+ /* #%$ hack for ksh semantics */
+ if (&optval[idx] == &Vflag)
+ Eflag = 0;
+ else if (&optval[idx] == &Eflag)
+ Vflag = 0;
+ }
+}
+
+static void
+setoption(int flag, int val)
+{
+ int i;
+
+ for (i = 0; i < NSHORTOPTS; i++)
+ if (optletter[i] == flag) {
+ setoptionbyindex(i, val);
+ return;
+ }
+ error("Illegal option -%c", flag);
+}
+
+
+/*
+ * Set the shell parameters.
+ */
+
+static void
+setparam(int argc, char **argv)
+{
+ char **newparam;
+ char **ap;
+
+ ap = newparam = ckmalloc((argc + 1) * sizeof *ap);
+ while (*argv) {
+ *ap++ = savestr(*argv++);
+ }
+ *ap = NULL;
+ freeparam(&shellparam);
+ shellparam.malloc = 1;
+ shellparam.nparam = argc;
+ shellparam.p = newparam;
+ shellparam.optp = NULL;
+ shellparam.reset = 1;
+ shellparam.optnext = NULL;
+}
+
+
+/*
+ * Free the list of positional parameters.
+ */
+
+void
+freeparam(struct shparam *param)
+{
+ char **ap;
+
+ if (param->malloc) {
+ for (ap = param->p ; *ap ; ap++)
+ ckfree(*ap);
+ ckfree(param->p);
+ }
+ if (param->optp) {
+ for (ap = param->optp ; *ap ; ap++)
+ ckfree(*ap);
+ ckfree(param->optp);
+ }
+}
+
+
+
+/*
+ * The shift builtin command.
+ */
+
+int
+shiftcmd(int argc, char **argv)
+{
+ int i, n;
+
+ n = 1;
+ if (argc > 1)
+ n = number(argv[1]);
+ if (n > shellparam.nparam)
+ return 1;
+ INTOFF;
+ shellparam.nparam -= n;
+ if (shellparam.malloc)
+ for (i = 0; i < n; i++)
+ ckfree(shellparam.p[i]);
+ memmove(shellparam.p, shellparam.p + n,
+ (shellparam.nparam + 1) * sizeof(shellparam.p[0]));
+ shellparam.reset = 1;
+ INTON;
+ return 0;
+}
+
+
+
+/*
+ * The set builtin command.
+ */
+
+int
+setcmd(int argc, char **argv)
+{
+ if (argc == 1)
+ return showvarscmd(argc, argv);
+ INTOFF;
+ options(0);
+ optschanged();
+ if (*argptr != NULL) {
+ setparam(argc - (argptr - argv), argptr);
+ }
+ INTON;
+ return 0;
+}
+
+
+void
+getoptsreset(const char *value)
+{
+ while (*value == '0')
+ value++;
+ if (strcmp(value, "1") == 0)
+ 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 = NULL, **ap;
+ int i;
+
+ if (argc < 3)
+ error("usage: getopts optstring var [arg]");
+
+ if (shellparam.reset == 1) {
+ INTOFF;
+ if (shellparam.optp) {
+ for (ap = shellparam.optp ; *ap ; ap++)
+ ckfree(*ap);
+ ckfree(shellparam.optp);
+ shellparam.optp = NULL;
+ }
+ if (argc > 3) {
+ shellparam.optp = ckmalloc((argc - 2) * sizeof *ap);
+ memset(shellparam.optp, '\0', (argc - 2) * sizeof *ap);
+ for (i = 0; i < argc - 3; i++)
+ shellparam.optp[i] = savestr(argv[i + 3]);
+ }
+ INTON;
+ optbase = argc == 3 ? shellparam.p : shellparam.optp;
+ shellparam.optnext = optbase;
+ shellparam.optptr = NULL;
+ shellparam.reset = 0;
+ } else
+ optbase = shellparam.optp ? shellparam.optp : shellparam.p;
+
+ return getopts(argv[1], argv[2], optbase, &shellparam.optnext,
+ &shellparam.optptr);
+}
+
+static int
+getopts(char *optstr, char *optvar, char **optfirst, char ***optnext,
+ char **optptr)
+{
+ char *p, *q;
+ char c = '?';
+ int done = 0;
+ int ind = 0;
+ int err = 0;
+ char s[10];
+ const char *newoptarg = NULL;
+
+ if ((p = *optptr) == 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';
+ newoptarg = s;
+ }
+ else
+ out2fmt_flush("Illegal option -%c\n", c);
+ c = '?';
+ goto out;
+ }
+ if (*++q == ':')
+ q++;
+ }
+
+ if (*++q == ':') {
+ if (*p == '\0' && (p = **optnext) == NULL) {
+ if (optstr[0] == ':') {
+ s[0] = c;
+ s[1] = '\0';
+ newoptarg = s;
+ c = ':';
+ }
+ else {
+ out2fmt_flush("No arg for -%c option\n", c);
+ c = '?';
+ }
+ goto out;
+ }
+
+ if (p == **optnext)
+ (*optnext)++;
+ newoptarg = p;
+ p = NULL;
+ }
+
+out:
+ if (*optnext != NULL)
+ ind = *optnext - optfirst + 1;
+ *optptr = p;
+ if (newoptarg != NULL)
+ err |= setvarsafe("OPTARG", newoptarg, 0);
+ else {
+ INTOFF;
+ err |= unsetvar("OPTARG");
+ INTON;
+ }
+ 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;
+ *optptr = NULL;
+ flushall();
+ exraise(EXERROR);
+ }
+ return done;
+}
+
+/*
+ * 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 returns the option, or '\0' on
+ * end of input.
+ */
+
+int
+nextopt(const char *optstring)
+{
+ char *p;
+ const char *q;
+ char c;
+
+ if ((p = nextopt_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);
+ shoptarg = p;
+ p = NULL;
+ }
+ nextopt_optptr = p;
+ return c;
+}
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