home *** CD-ROM | disk | FTP | other *** search
- /* 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);
- }
-