From e7d0a7724b70b13eaee2c732de8d3696220dd91e Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Tue, 24 Oct 2000 06:18:37 +0000
Subject: [PATCH] Initial revision

---
 lib/prepargs.c    | 91 +++++++++++++++++++++++++++++++++++++++++++++++
 lib/prepargs.h    |  3 ++
 tests/extrac04.sh | 28 +++++++++++++++
 3 files changed, 122 insertions(+)
 create mode 100644 lib/prepargs.c
 create mode 100644 lib/prepargs.h
 create mode 100755 tests/extrac04.sh

diff --git a/lib/prepargs.c b/lib/prepargs.c
new file mode 100644
index 0000000..25dd601
--- /dev/null
+++ b/lib/prepargs.c
@@ -0,0 +1,91 @@
+/* Parse arguments from a string and prepend them to an argv.
+   Copyright 1999, 2000 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
+
+/* Written by Paul Eggert <eggert@twinsun.com>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+#include "prepargs.h"
+#include <sys/types.h>
+#include <xalloc.h>
+
+#include <ctype.h>
+
+/* IN_CTYPE_DOMAIN (C) is nonzero if the unsigned char C can safely be given
+   as an argument to <ctype.h> macros like "isspace".  */
+#ifdef STDC_HEADERS
+# define IN_CTYPE_DOMAIN(c) 1
+#else
+# define IN_CTYPE_DOMAIN(c) ((c) <= 0177)
+#endif
+
+#define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
+
+/* Find the white-space-separated options specified by OPTIONS, and
+   using BUF to store copies of these options, set ARGV[0], ARGV[1],
+   etc. to the option copies.  Return the number N of options found.
+   Do not set ARGV[N] to NULL.  If ARGV is NULL, do not store ARGV[0]
+   etc.  Backslash can be used to escape whitespace (and backslashes).  */
+static int
+prepend_args (char const *options, char *buf, char **argv)
+{
+  char const *o = options;
+  char *b = buf;
+  int n = 0;
+
+  for (;;)
+    {
+      while (ISSPACE ((unsigned char) *o))
+	o++;
+      if (!*o)
+	return n;
+      if (argv)
+	argv[n] = b;
+      n++;
+
+      do
+	if ((*b++ = *o++) == '\\' && *o)
+	  b[-1] = *o++;
+      while (*o && ! ISSPACE ((unsigned char) *o));
+
+      *b++ = '\0';
+    }
+}
+
+/* Prepend the whitespace-separated options in OPTIONS to the argument
+   vector of a main program with argument count *PARGC and argument
+   vector *PARGV.  */
+void
+prepend_default_options (char const *options, int *pargc, char ***pargv)
+{
+  if (options)
+    {
+      char *buf = xmalloc (strlen (options) + 1);
+      int prepended = prepend_args (options, buf, (char **) NULL);
+      int argc = *pargc;
+      char * const *argv = *pargv;
+      char **pp = (char **) xmalloc ((prepended + argc + 1) * sizeof *pp);
+      *pargc = prepended + argc;
+      *pargv = pp;
+      *pp++ = *argv++;
+      pp += prepend_args (options, buf, pp);
+      while ((*pp++ = *argv++))
+	continue;
+    }
+}
diff --git a/lib/prepargs.h b/lib/prepargs.h
new file mode 100644
index 0000000..ce93ea8
--- /dev/null
+++ b/lib/prepargs.h
@@ -0,0 +1,3 @@
+/* Parse arguments from a string and prepend them to an argv.  */
+
+void prepend_default_options (char const *, int *, char ***);
diff --git a/tests/extrac04.sh b/tests/extrac04.sh
new file mode 100755
index 0000000..6cf6d6d
--- /dev/null
+++ b/tests/extrac04.sh
@@ -0,0 +1,28 @@
+#! /bin/sh
+# Check for fnmatch problems in glibc 2.1.95.
+
+. ./preset
+. $srcdir/before
+
+set -e
+touch file1
+mkdir directory
+mkdir directory/subdirectory
+touch directory/file1
+touch directory/file2
+touch directory/subdirectory/file1
+touch directory/subdirectory/file2
+tar -cf archive ./file1 directory
+tar -tf archive \
+  --exclude='./*1' \
+  --exclude='d*/*1' \
+  --exclude='d*/s*/*2' | sort
+
+out="\
+directory/
+directory/file2
+directory/subdirectory/
+directory/subdirectory/file1
+"
+
+. $srcdir/after
-- 
2.45.2