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/*
* Copyright 1989 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright (c) 1987 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/* LINTLIBRARY */
#include <stdio.h>
#include <string.h>
/*
* get option letter from argument vector
*/
/* See lib/libc/gen/common/optind.c for next 3 definitions. */
extern char *optarg; /* argument associated with option */
extern int opterr; /* if error message should be printed */
extern int optind; /* index into parent argv vector */
int optopt; /* character checked for validity */
#define BADCH (int)'?'
#define EMSG ""
int
getopt(int nargc, char **nargv, char *ostr)
{
static char *place = EMSG; /* option letter processing */
char *oli; /* option letter list index */
char *p;
if (!*place) { /* update scanning pointer */
if (optind >= nargc || *(place = nargv[optind]) != '-') {
place = EMSG;
return (EOF);
}
if (place[1] && *++place == '-') { /* found "--" */
++optind;
place = EMSG;
return (EOF);
}
} /* option letter okay? */
if ((optopt = (int)*place++) == (int)':' ||
!(oli = strchr(ostr, optopt))) {
/*
* For backwards compatibility: don't treat '-' as an
* option letter unless caller explicitly asked for it.
*/
if (optopt == (int)'-')
return (EOF);
if (!*place)
++optind;
if (opterr) {
if (!(p = strrchr(*nargv, '/')))
p = *nargv;
else
++p;
(void)fprintf(stderr, "%s: illegal option -- %c\n",
p, optopt);
}
return (BADCH);
}
if (*++oli != ':') { /* don't need argument */
optarg = NULL;
if (!*place)
++optind;
} else { /* need an argument */
if (*place) /* no white space */
optarg = place;
else if (nargc <= ++optind) { /* no arg */
place = EMSG;
if (!(p = strrchr(*nargv, '/')))
p = *nargv;
else
++p;
if (opterr)
(void)fprintf(stderr,
"%s: option requires an argument -- %c\n",
p, optopt);
return (BADCH);
} else /* white space */
optarg = nargv[optind];
place = EMSG;
++optind;
}
return (optopt); /* dump back option letter */
}
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