Adding upstream version 1:9.18.19.upstream/1%9.18.19

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 265 insertions, 0 deletions

diff --git a/lib/isc/commandline.c b/lib/isc/commandline.c
new file mode 100644
index 0000000..1b4a33a
--- /dev/null
+++ b/lib/isc/commandline.c
@@ -0,0 +1,265 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0 AND BSD-3-Clause
+
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+/*
+ * Copyright (C) 1987, 1993, 1994 The Regents of the University of California.
+ *
+ * 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.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*! \file
+ * This file was adapted from the NetBSD project's source tree, RCS ID:
+ *    NetBSD: getopt.c,v 1.15 1999/09/20 04:39:37 lukem Exp
+ *
+ * The primary change has been to rename items to the ISC namespace
+ * and format in the ISC coding style.
+ */
+
+#include <stdbool.h>
+#include <stdio.h>
+
+#include <isc/commandline.h>
+#include <isc/mem.h>
+#include <isc/print.h>
+#include <isc/string.h>
+#include <isc/util.h>
+
+/*% Index into parent argv vector. */
+int isc_commandline_index = 1;
+/*% Character checked for validity. */
+int isc_commandline_option;
+/*% Argument associated with option. */
+char *isc_commandline_argument;
+/*% For printing error messages. */
+char *isc_commandline_progname;
+/*% Print error messages. */
+bool isc_commandline_errprint = true;
+/*% Reset processing. */
+bool isc_commandline_reset = true;
+
+static char endopt = '\0';
+
+#define BADOPT '?'
+#define BADARG ':'
+#define ENDOPT &endopt
+
+/*!
+ * getopt --
+ *	Parse argc/argv argument vector.
+ */
+int
+isc_commandline_parse(int argc, char *const *argv, const char *options) {
+	static char *place = ENDOPT;
+	const char *option; /* Index into *options of option. */
+
+	REQUIRE(argc >= 0 && argv != NULL && options != NULL);
+
+	/*
+	 * Update scanning pointer, either because a reset was requested or
+	 * the previous argv was finished.
+	 */
+	if (isc_commandline_reset || *place == '\0') {
+		if (isc_commandline_reset) {
+			isc_commandline_index = 1;
+			isc_commandline_reset = false;
+		}
+
+		if (isc_commandline_progname == NULL) {
+			isc_commandline_progname = argv[0];
+		}
+
+		if (isc_commandline_index >= argc ||
+		    *(place = argv[isc_commandline_index]) != '-')
+		{
+			/*
+			 * Index out of range or points to non-option.
+			 */
+			place = ENDOPT;
+			return (-1);
+		}
+
+		if (place[1] != '\0' && *++place == '-' && place[1] == '\0') {
+			/*
+			 * Found '--' to signal end of options.  Advance
+			 * index to next argv, the first non-option.
+			 */
+			isc_commandline_index++;
+			place = ENDOPT;
+			return (-1);
+		}
+	}
+
+	isc_commandline_option = *place++;
+	option = strchr(options, isc_commandline_option);
+
+	/*
+	 * Ensure valid option has been passed as specified by options string.
+	 * '-:' is never a valid command line option because it could not
+	 * distinguish ':' from the argument specifier in the options string.
+	 */
+	if (isc_commandline_option == ':' || option == NULL) {
+		if (*place == '\0') {
+			isc_commandline_index++;
+		}
+
+		if (isc_commandline_errprint && *options != ':') {
+			fprintf(stderr, "%s: illegal option -- %c\n",
+				isc_commandline_progname,
+				isc_commandline_option);
+		}
+
+		return (BADOPT);
+	}
+
+	if (*++option != ':') {
+		/*
+		 * Option does not take an argument.
+		 */
+		isc_commandline_argument = NULL;
+
+		/*
+		 * Skip to next argv if at the end of the current argv.
+		 */
+		if (*place == '\0') {
+			++isc_commandline_index;
+		}
+	} else {
+		/*
+		 * Option needs an argument.
+		 */
+		if (*place != '\0') {
+			/*
+			 * Option is in this argv, -D1 style.
+			 */
+			isc_commandline_argument = place;
+		} else if (argc > ++isc_commandline_index) {
+			/*
+			 * Option is next argv, -D 1 style.
+			 */
+			isc_commandline_argument = argv[isc_commandline_index];
+		} else {
+			/*
+			 * Argument needed, but no more argv.
+			 */
+			place = ENDOPT;
+
+			/*
+			 * Silent failure with "missing argument" return
+			 * when ':' starts options string, per historical spec.
+			 */
+			if (*options == ':') {
+				return (BADARG);
+			}
+
+			if (isc_commandline_errprint) {
+				fprintf(stderr,
+					"%s: option requires an argument -- "
+					"%c\n",
+					isc_commandline_progname,
+					isc_commandline_option);
+			}
+
+			return (BADOPT);
+		}
+
+		place = ENDOPT;
+
+		/*
+		 * Point to argv that follows argument.
+		 */
+		isc_commandline_index++;
+	}
+
+	return (isc_commandline_option);
+}
+
+isc_result_t
+isc_commandline_strtoargv(isc_mem_t *mctx, char *s, unsigned int *argcp,
+			  char ***argvp, unsigned int n) {
+	isc_result_t result;
+
+restart:
+	/* Discard leading whitespace. */
+	while (*s == ' ' || *s == '\t') {
+		s++;
+	}
+
+	if (*s == '\0') {
+		/* We have reached the end of the string. */
+		*argcp = n;
+		*argvp = isc_mem_get(mctx, n * sizeof(char *));
+	} else {
+		char *p = s;
+		while (*p != ' ' && *p != '\t' && *p != '\0' && *p != '{') {
+			if (*p == '\n') {
+				*p = ' ';
+				goto restart;
+			}
+			p++;
+		}
+
+		/* do "grouping", items between { and } are one arg */
+		if (*p == '{') {
+			char *t = p;
+			/*
+			 * shift all characters to left by 1 to get rid of '{'
+			 */
+			while (*t != '\0') {
+				t++;
+				*(t - 1) = *t;
+			}
+			while (*p != '\0' && *p != '}') {
+				p++;
+			}
+			/* get rid of '}' character */
+			if (*p == '}') {
+				*p = '\0';
+				p++;
+			}
+			/* normal case, no "grouping" */
+		} else if (*p != '\0') {
+			*p++ = '\0';
+		}
+
+		result = isc_commandline_strtoargv(mctx, p, argcp, argvp,
+						   n + 1);
+		if (result != ISC_R_SUCCESS) {
+			return (result);
+		}
+		(*argvp)[n] = s;
+	}
+
+	return (ISC_R_SUCCESS);
+}