138451Smsmith/* 238451Smsmith * Copyright (c) 1987, 1993, 1994 338451Smsmith * The Regents of the University of California. All rights reserved. 438451Smsmith * 538451Smsmith * Redistribution and use in source and binary forms, with or without 638451Smsmith * modification, are permitted provided that the following conditions 738451Smsmith * are met: 838451Smsmith * 1. Redistributions of source code must retain the above copyright 938451Smsmith * notice, this list of conditions and the following disclaimer. 1038451Smsmith * 2. Redistributions in binary form must reproduce the above copyright 1138451Smsmith * notice, this list of conditions and the following disclaimer in the 1238451Smsmith * documentation and/or other materials provided with the distribution. 1338451Smsmith * 4. Neither the name of the University nor the names of its contributors 1438451Smsmith * may be used to endorse or promote products derived from this software 1538451Smsmith * without specific prior written permission. 1638451Smsmith * 1738451Smsmith * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1838451Smsmith * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1938451Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2038451Smsmith * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2138451Smsmith * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2238451Smsmith * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2338451Smsmith * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2438451Smsmith * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2538451Smsmith * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2638451Smsmith * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2738451Smsmith * SUCH DAMAGE. 2838451Smsmith */ 2938451Smsmith 3084221Sdillon#include <sys/cdefs.h> 3184221Sdillon__FBSDID("$FreeBSD$"); 3284221Sdillon 3338451Smsmith#if defined(LIBC_SCCS) && !defined(lint) 3438451Smsmithstatic char sccsid[] = "@(#)getopt.c 8.3 (Berkeley) 4/27/95"; 3538451Smsmith#endif /* LIBC_SCCS and not lint */ 3638451Smsmith 3738451Smsmith#include "stand.h" 3838451Smsmith#include <string.h> 3938451Smsmith 4038451Smsmithint opterr = 1, /* if error message should be printed */ 4138451Smsmith optind = 1, /* index into parent argv vector */ 4238451Smsmith optopt, /* character checked for validity */ 4338451Smsmith optreset; /* reset getopt */ 4438451Smsmithchar *optarg; /* argument associated with option */ 4538451Smsmith 4638451Smsmith#define BADCH (int)'?' 4738451Smsmith#define BADARG (int)':' 4838451Smsmith#define EMSG "" 4938451Smsmith 5038451Smsmith/* 5138451Smsmith * getopt -- 5238451Smsmith * Parse argc/argv argument vector. 5338451Smsmith */ 5438451Smsmithint 55221358Srodrigcgetopt(int nargc, char * const *nargv, const char *ostr) 5638451Smsmith{ 5738451Smsmith static char *place = EMSG; /* option letter processing */ 5838451Smsmith char *oli; /* option letter list index */ 5938451Smsmith 6038451Smsmith if (optreset || !*place) { /* update scanning pointer */ 6138451Smsmith optreset = 0; 6238451Smsmith if (optind >= nargc || *(place = nargv[optind]) != '-') { 6338451Smsmith place = EMSG; 6438451Smsmith return (-1); 6538451Smsmith } 6638451Smsmith if (place[1] && *++place == '-') { /* found "--" */ 6738451Smsmith ++optind; 6838451Smsmith place = EMSG; 6938451Smsmith return (-1); 7038451Smsmith } 7138451Smsmith } /* option letter okay? */ 7238451Smsmith if ((optopt = (int)*place++) == (int)':' || 7338451Smsmith !(oli = strchr(ostr, optopt))) { 7438451Smsmith /* 7538451Smsmith * if the user didn't specify '-' as an option, 7638451Smsmith * assume it means -1. 7738451Smsmith */ 7838451Smsmith if (optopt == (int)'-') 7938451Smsmith return (-1); 8038451Smsmith if (!*place) 8138451Smsmith ++optind; 8238451Smsmith if (opterr && *ostr != ':') 8338451Smsmith (void)printf("illegal option -- %c\n", optopt); 8438451Smsmith return (BADCH); 8538451Smsmith } 8638451Smsmith if (*++oli != ':') { /* don't need argument */ 8738451Smsmith optarg = NULL; 8838451Smsmith if (!*place) 8938451Smsmith ++optind; 9038451Smsmith } 9138451Smsmith else { /* need an argument */ 9238451Smsmith if (*place) /* no white space */ 9338451Smsmith optarg = place; 9438451Smsmith else if (nargc <= ++optind) { /* no arg */ 9538451Smsmith place = EMSG; 9638451Smsmith if (*ostr == ':') 9738451Smsmith return (BADARG); 9838451Smsmith if (opterr) 9938451Smsmith (void)printf("option requires an argument -- %c\n", optopt); 10038451Smsmith return (BADCH); 10138451Smsmith } 10238451Smsmith else /* white space */ 10338451Smsmith optarg = nargv[optind]; 10438451Smsmith place = EMSG; 10538451Smsmith ++optind; 10638451Smsmith } 10738451Smsmith return (optopt); /* dump back option letter */ 10838451Smsmith} 109