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- /* (C) Copyright 1993 by John G. Myers
- * All Rights Reserved.
- *
- * Permission to use, copy, modify, distribute, and sell this software
- * and its documentation for any purpose is hereby granted without
- * fee, provided that the above copyright notice appear in all copies
- * and that both that copyright notice and this permission notice
- * appear in supporting documentation, and that the name of John G.
- * Myers not be used in advertising or publicity pertaining to
- * distribution of the software without specific, written prior
- * permission. John G. Myers makes no representations about the
- * suitability of this software for any purpose. It is provided "as
- * is" without express or implied warranty.
- *
- * JOHN G. MYERS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
- * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS, IN NO EVENT SHALL JOHN G. MYERS BE LIABLE FOR ANY SPECIAL,
- * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
- * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
- * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
- #include <stdio.h>
-
- #define ERR(s, c) \
- if (opterr) { \
- char buff[2]; \
- buff[0] = c; buff[1] = '\n'; \
- (void)write(2, av[0], strlen(av[0])); \
- (void)write(2, s, strlen(s)); \
- (void)write(2, buff, 2); \
- }
-
-
- int opterr = 1;
- int optind = 1;
- int optopt;
- char *optarg;
-
-
- /*
- ** Return options and their values from the command line.
- ** This comes from the AT&T public-domain getopt published in mod.sources
- ** (i.e., comp.sources.unix before the great Usenet renaming).
- */
- int
- getopt(ac, av, opts)
- int ac;
- char *av[];
- char *opts;
- {
- extern char *strchr();
- static int i = 1;
- char *p;
-
- /* Move to next value from argv? */
- if (i == 1) {
- if (optind >= ac ||
- #ifdef __MSDOS__
- (av[optind][0] != '-' && av[optind][0] != '/')
- #else
- av[optind][0] != '-'
- #endif
- || av[optind][1] == '\0')
- return EOF;
- if (strcmp(av[optind], "--") == 0) {
- optind++;
- return EOF;
- }
- }
-
- /* Get next option character. */
- if ((optopt = av[optind][i]) == ':'
- || (p = strchr(opts, optopt)) == NULL) {
- ERR(": illegal option -- ", optopt);
- if (av[optind][++i] == '\0') {
- optind++;
- i = 1;
- }
- return '?';
- }
-
- /* Snarf argument? */
- if (*++p == ':') {
- if (av[optind][i + 1] != '\0')
- optarg = &av[optind++][i + 1];
- else {
- if (++optind >= ac) {
- ERR(": option requires an argument -- ", optopt);
- i = 1;
- return '?';
- }
- optarg = av[optind++];
- }
- i = 1;
- }
- else {
- if (av[optind][++i] == '\0') {
- i = 1;
- optind++;
- }
- optarg = NULL;
- }
-
- return optopt;
- }
-