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Annotation of 43BSDTahoe/lib/libc/compat-sys5/getopt.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1987 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  */
        !            17: 
        !            18: #if defined(LIBC_SCCS) && !defined(lint)
        !            19: static char sccsid[] = "@(#)getopt.c   4.7 (Berkeley) 6/27/88";
        !            20: #endif /* LIBC_SCCS and not lint */
        !            21: 
        !            22: #include <stdio.h>
        !            23: 
        !            24: /*
        !            25:  * get option letter from argument vector
        !            26:  */
        !            27: int    opterr = 1,             /* if error message should be printed */
        !            28:        optind = 1,             /* index into parent argv vector */
        !            29:        optopt;                 /* character checked for validity */
        !            30: char   *optarg;                /* argument associated with option */
        !            31: 
        !            32: #define        BADCH   (int)'?'
        !            33: #define        EMSG    ""
        !            34: #define        tell(s) { \
        !            35:        if (opterr) { \
        !            36:                fputs(*nargv, stderr); \
        !            37:                fputs(s, stderr); \
        !            38:                fputc(optopt, stderr); \
        !            39:                fputc((int)'\n', stderr); \
        !            40:        } \
        !            41:        return(BADCH); \
        !            42: }
        !            43: 
        !            44: getopt(nargc, nargv, ostr)
        !            45:        int nargc;
        !            46:        char **nargv, *ostr;
        !            47: {
        !            48:        static char *place = EMSG;              /* option letter processing */
        !            49:        register char *oli;                     /* option letter list index */
        !            50:        char *index();
        !            51: 
        !            52:        if (!*place) {                          /* update scanning pointer */
        !            53:                if (optind >= nargc || *(place = nargv[optind]) != '-')
        !            54:                        return(EOF);
        !            55:                if (place[1] && *++place == '-') {      /* found "--" */
        !            56:                        ++optind;
        !            57:                        return(EOF);
        !            58:                }
        !            59:        }                                       /* option letter okay? */
        !            60:        if ((optopt = (int)*place++) == (int)':' ||
        !            61:            !(oli = index(ostr, optopt))) {
        !            62:                if (!*place)
        !            63:                        ++optind;
        !            64:                tell(": illegal option -- ");
        !            65:        }
        !            66:        if (*++oli != ':') {                    /* don't need argument */
        !            67:                optarg = NULL;
        !            68:                if (!*place)
        !            69:                        ++optind;
        !            70:        }
        !            71:        else {                                  /* need an argument */
        !            72:                if (*place)                     /* no white space */
        !            73:                        optarg = place;
        !            74:                else if (nargc <= ++optind) {   /* no arg */
        !            75:                        place = EMSG;
        !            76:                        tell(": option requires an argument -- ");
        !            77:                }
        !            78:                else                            /* white space */
        !            79:                        optarg = nargv[optind];
        !            80:                place = EMSG;
        !            81:                ++optind;
        !            82:        }
        !            83:        return(optopt);                         /* dump back option letter */
        !            84: }

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