Annotation of prex/usr/lib/libc/stdlib/getopt.c, Revision 1.1
1.1 ! nbrk 1: /*
! 2: * Copyright (c) 1987, 1993, 1994
! 3: * The Regents of the University of California. All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. Neither the name of the University nor the names of its contributors
! 14: * may be used to endorse or promote products derived from this software
! 15: * without specific prior written permission.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 20: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: */
! 29:
! 30: #include <unistd.h>
! 31: #include <stdio.h>
! 32: #include <stdlib.h>
! 33: #include <string.h>
! 34:
! 35: int opterr = 1, /* if error message should be printed */
! 36: optind = 1, /* index into parent argv vector */
! 37: optopt, /* character checked for validity */
! 38: optreset; /* reset getopt */
! 39: char *optarg; /* argument associated with option */
! 40:
! 41: #define BADCH (int)'?'
! 42: #define BADARG (int)':'
! 43: #define EMSG ""
! 44:
! 45: /*
! 46: * getopt --
! 47: * Parse argc/argv argument vector.
! 48: */
! 49: int
! 50: getopt(int nargc, char * const nargv[], const char *ostr)
! 51: {
! 52: #if 0
! 53: extern char *__progname;
! 54: #endif
! 55: static char *place = EMSG; /* option letter processing */
! 56: char *oli; /* option letter list index */
! 57:
! 58: if (optreset || !*place) { /* update scanning pointer */
! 59: optreset = 0;
! 60: if (optind >= nargc || *(place = nargv[optind]) != '-') {
! 61: place = EMSG;
! 62: return (-1);
! 63: }
! 64: if (place[1] && *++place == '-') { /* found "--" */
! 65: ++optind;
! 66: place = EMSG;
! 67: return (-1);
! 68: }
! 69: } /* option letter okay? */
! 70: if ((optopt = (int)*place++) == (int)':' ||
! 71: !(oli = strchr(ostr, optopt))) {
! 72: /*
! 73: * if the user didn't specify '-' as an option,
! 74: * assume it means -1.
! 75: */
! 76: if (optopt == (int)'-')
! 77: return (-1);
! 78: if (!*place)
! 79: ++optind;
! 80: #if 0
! 81: if (opterr && *ostr != ':')
! 82: (void)fprintf(stderr,
! 83: "%s: illegal option -- %c\n", __progname, optopt);
! 84: #endif
! 85: return (BADCH);
! 86: }
! 87: if (*++oli != ':') { /* don't need argument */
! 88: optarg = NULL;
! 89: if (!*place)
! 90: ++optind;
! 91: }
! 92: else { /* need an argument */
! 93: if (*place) /* no white space */
! 94: optarg = place;
! 95: else if (nargc <= ++optind) { /* no arg */
! 96: place = EMSG;
! 97: if (*ostr == ':')
! 98: return (BADARG);
! 99: #if 0
! 100: if (opterr)
! 101: (void)fprintf(stderr,
! 102: "%s: option requires an argument -- %c\n",
! 103: __progname, optopt);
! 104: #endif
! 105: return (BADCH);
! 106: }
! 107: else /* white space */
! 108: optarg = nargv[optind];
! 109: place = EMSG;
! 110: ++optind;
! 111: }
! 112: return (optopt); /* dump back option letter */
! 113: }
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