1 files changed, 136 insertions, 0 deletions
diff --git a/builtins/bashgetopt.c b/builtins/bashgetopt.c
new file mode 100644
index 0000000..95dcaac
--- /dev/null
+++ b/builtins/bashgetopt.c
@@ -0,0 +1,136 @@
+/* bashgetopt.c -- `getopt' for use by the builtins. */
+
+/* Copyright (C) 1992 Free Software Foundation, Inc.
+
+This file is part of GNU Bash, the Bourne Again SHell.
+
+Bash 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 1, or (at your option) any later
+version.
+
+Bash 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 Bash; see the file COPYING.  If not, write to the Free Software
+Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <errno.h>
+#include "shell.h"
+
+#include "bashansi.h"
+
+#define ERR(S, C)	builtin_error("%s%c", (S), (C))
+
+static int	sp;
+
+char    *list_optarg;
+int	list_optopt;
+
+static WORD_LIST *lhead = (WORD_LIST *)NULL;
+WORD_LIST	*lcurrent = (WORD_LIST *)NULL;
+WORD_LIST	*loptend;	/* Points to the first non-option argument in the list */
+
+int
+internal_getopt(list, opts)
+WORD_LIST	*list;
+char		*opts;
+{
+	register int c;
+	register char *cp;
+
+	if (!list) {
+		list_optarg = (char *)NULL;
+		loptend = (WORD_LIST *)NULL;	/* No non-option arguments */
+		return -1;
+	}
+
+	if (list != lhead || !lhead) {
+		/* Hmmm.... called with a different word list.  Reset. */
+		sp = 1;
+		lcurrent = lhead = list;
+		loptend = (WORD_LIST *)NULL;
+	}
+
+	if (sp == 1) {
+		if (!lcurrent ||
+		    (lcurrent->word->word[0] != '-' || lcurrent->word->word[1] == '\0')) {
+		    	lhead = (WORD_LIST *)NULL;
+		    	loptend = lcurrent;
+			return(-1);
+		} else if (lcurrent->word->word[0] == '-' &&
+			   lcurrent->word->word[1] == '-' &&
+			   lcurrent->word->word[2] == 0) {
+			lhead = (WORD_LIST *)NULL;
+			loptend = lcurrent->next;
+			return(-1);
+		}
+	}
+
+	list_optopt = c = lcurrent->word->word[sp];
+
+	if (c == ':' || (cp = strchr(opts, c)) == NULL) {
+		ERR("illegal option: -", c);
+		if (lcurrent->word->word[++sp] == '\0') {
+			lcurrent = lcurrent->next;
+			sp = 1;
+		}
+		list_optarg = NULL;
+		if (lcurrent)
+			loptend = lcurrent->next;
+		return('?');
+	}
+
+	if (*++cp == ':') {
+		/* Option requires an argument. */
+		/* We allow -l2 as equivalent to -l 2 */
+		if (lcurrent->word->word[sp+1] != '\0') {
+			list_optarg = &(lcurrent->word->word[sp+1]);
+			lcurrent = lcurrent->next;
+		} else if (lcurrent->next == NULL) {
+			ERR("option requires an argument: -", c);
+			sp = 1;
+			list_optarg = (char *)NULL;
+			return('?');
+		} else {
+			lcurrent = lcurrent->next;
+			list_optarg = lcurrent->word->word;
+			lcurrent = lcurrent->next;
+		}
+		sp = 1;
+	} else {
+		/* No argument, just return the option. */
+		if (lcurrent->word->word[++sp] == '\0') {
+			sp = 1;
+			lcurrent = lcurrent->next;
+		}
+		list_optarg = (char *)NULL;
+	}
+
+	return(c);
+}
+
+/*
+ * reset_internal_getopt -- force the in[ft]ernal getopt to reset
+ */
+
+void
+reset_internal_getopt ()
+{
+	lhead = lcurrent = loptend = (WORD_LIST *)NULL;
+	sp = 1;
+}
+
+void
+report_bad_option ()
+{
+	char s[3];
+
+	s[0] = '-';
+	s[1] = list_optopt;
+	s[2] = '\0';
+	bad_option (s);
+}