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/* src/port/getopt.c */
/*
* Copyright (c) 1987, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
*/
#include "c.h"
#include "pg_getopt.h"
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95";
#endif /* LIBC_SCCS and not lint */
/*
* On OpenBSD and some versions of Solaris, opterr and friends are defined in
* core libc rather than in a separate getopt module. Define these variables
* only if configure found they aren't there by default; otherwise, this
* module and its callers will just use libc's variables. (We assume that
* testing opterr is sufficient for all of these.)
*/
#ifndef HAVE_INT_OPTERR
int opterr = 1, /* if error message should be printed */
optind = 1, /* index into parent argv vector */
optopt; /* character checked for validity */
char *optarg; /* argument associated with option */
#endif
#define BADCH (int)'?'
#define BADARG (int)':'
#define EMSG ""
/*
* getopt
* Parse argc/argv argument vector.
*
* This implementation does not use optreset. Instead, we guarantee that
* it can be restarted on a new argv array after a previous call returned -1,
* if the caller resets optind to 1 before the first call of the new series.
* (Internally, this means we must be sure to reset "place" to EMSG before
* returning -1.)
*/
int
getopt(int nargc, char *const *nargv, const char *ostr)
{
static char *place = EMSG; /* option letter processing */
char *oli; /* option letter list index */
if (!*place)
{ /* update scanning pointer */
if (optind >= nargc || *(place = nargv[optind]) != '-')
{
place = EMSG;
return -1;
}
if (place[1] && *++place == '-' && place[1] == '\0')
{ /* found "--" */
++optind;
place = EMSG;
return -1;
}
} /* option letter okay? */
if ((optopt = (int) *place++) == (int) ':' ||
!(oli = strchr(ostr, optopt)))
{
/*
* if the user didn't specify '-' as an option, assume it means -1.
*/
if (optopt == (int) '-')
{
place = EMSG;
return -1;
}
if (!*place)
++optind;
if (opterr && *ostr != ':')
(void) fprintf(stderr,
"illegal option -- %c\n", 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 (*ostr == ':')
return BADARG;
if (opterr)
(void) fprintf(stderr,
"option requires an argument -- %c\n",
optopt);
return BADCH;
}
else
/* white space */
optarg = nargv[optind];
place = EMSG;
++optind;
}
return optopt; /* dump back option letter */
}
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