freebsd-src/contrib/bmake/getopt.c
Simon J. Gerraty 9d3df31ec0 Merge bmake-20240520
Merge commit '29efb3dcaedd9cbabc6f96f35545baf2c8b28501'
2024-05-23 13:12:43 -07:00

189 lines
4.8 KiB
C

/* $NetBSD: getopt.c,v 1.30 2024/01/19 18:41:38 christos Exp $ */
/*
* 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
* SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#if !defined(HAVE_GETOPT) || defined(WANT_GETOPT_LONG) || defined(BROKEN_GETOPT)
#include <sys/cdefs.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define BADCH (int)'?'
#define BADARG (int)':'
#define EMSG ""
int opterr = 1, /* if error message should be printed */
optind = 1, /* index into parent argv vector */
optopt = BADCH, /* character checked for validity */
optreset; /* reset getopt */
char *optarg; /* argument associated with option */
/*
* getopt --
* Parse argc/argv argument vector.
*/
int
getopt(int nargc, char * const nargv[], const char *ostr)
{
extern char *__progname;
static const char *place = EMSG; /* option letter processing */
const char *oli; /* option letter list index */
#ifndef BSD4_4
if (!__progname) {
if (__progname = strrchr(nargv[0], '/'))
++__progname;
else
__progname = nargv[0];
}
#endif
if (optreset || *place == 0) { /* update scanning pointer */
optreset = 0;
place = nargv[optind];
if (optind >= nargc || *place++ != '-') {
/* Argument is absent or is not an option */
place = EMSG;
return (-1);
}
optopt = *place++;
if (optopt == '-' && *place == 0) {
/* "--" => end of options */
++optind;
place = EMSG;
return (-1);
}
if (optopt == 0) {
/* Solitary '-', treat as a '-' option
if the program (eg su) is looking for it. */
place = EMSG;
if (strchr(ostr, '-') == NULL)
return -1;
optopt = '-';
}
} else
optopt = *place++;
/* See if option letter is one the caller wanted... */
if (optopt == ':' || (oli = strchr(ostr, optopt)) == NULL) {
if (*place == 0)
++optind;
if (opterr && *ostr != ':')
(void)fprintf(stderr,
"%s: unknown option -- %c\n", __progname, optopt);
return (BADCH);
}
/* Does this option need an argument? */
if (oli[1] != ':') {
/* don't need argument */
optarg = NULL;
if (*place == 0)
++optind;
} else {
/* Option-argument is either the rest of this argument or the
entire next argument. */
if (*place)
optarg = __UNCONST(place);
else if (oli[2] == ':')
/*
* GNU Extension, for optional arguments if the rest of
* the argument is empty, we return NULL
*/
optarg = NULL;
else if (nargc > ++optind)
optarg = nargv[optind];
else {
/* option-argument absent */
place = EMSG;
if (*ostr == ':')
return (BADARG);
if (opterr)
(void)fprintf(stderr,
"%s: option requires an argument -- %c\n",
__progname, optopt);
return (BADCH);
}
place = EMSG;
++optind;
}
return (optopt); /* return option letter */
}
#endif
#ifdef MAIN
#ifndef BSD4_4
char *__progname;
#endif
int
main(argc, argv)
int argc;
char *argv[];
{
int c;
char *opts = argv[1];
--argc;
++argv;
while ((c = getopt(argc, argv, opts)) != EOF) {
switch (c) {
case '-':
if (optarg)
printf("--%s ", optarg);
break;
case '?':
exit(1);
break;
default:
if (optarg)
printf("-%c %s ", c, optarg);
else
printf("-%c ", c);
break;
}
}
if (optind < argc) {
printf("-- ");
for (; optind < argc; ++optind) {
printf("%s ", argv[optind]);
}
}
printf("\n");
exit(0);
}
#endif