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