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/* $Id: getopt.c,v 1.1 2005/01/20 19:57:38 erg Exp $ $Revision: 1.1 $ */
/* vim:set shiftwidth=4 ts=8: */
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)getopt.c 1.1 90/03/23 SMI";
/* from 4.3BSD-tahoe 4.9 6/23/89 */
#endif
/*
* Copyright (c) 1989 Sun Microsystems, Inc.
*/
/*
* 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.
* /
/* LINTLIBRARY */
#include <stdio.h>
#include <string.h>
#include "getopt.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 ""
getopt(int nargc, char *const nargv[], const char *ostr)
{
static char *place = EMSG; /* option letter processing */
register 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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