Return to getopt.c CVS log

Up to [CSRG BSD Unix] / 43BSD / lib / libc / compat-sys5

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

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1985 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  */
        !             6: 
        !             7: #if defined(LIBC_SCCS) && !defined(lint)
        !             8: static char sccsid[] = "@(#)getopt.c   4.3 (Berkeley) 3/9/86";
        !             9: #endif LIBC_SCCS and not lint
        !            10: 
        !            11: #include <stdio.h>
        !            12: 
        !            13: /*
        !            14:  * get option letter from argument vector
        !            15:  */
        !            16: int    opterr = 1,             /* if error message should be printed */
        !            17:        optind = 1,             /* index into parent argv vector */
        !            18:        optopt;                 /* character checked for validity */
        !            19: char   *optarg;                /* argument associated with option */
        !            20: 
        !            21: #define BADCH  (int)'?'
        !            22: #define EMSG   ""
        !            23: #define tell(s)        if (opterr) {fputs(*nargv,stderr);fputs(s,stderr); \
        !            24:                fputc(optopt,stderr);fputc('\n',stderr);return(BADCH);}
        !            25: 
        !            26: getopt(nargc,nargv,ostr)
        !            27: int    nargc;
        !            28: char   **nargv,
        !            29:        *ostr;
        !            30: {
        !            31:        static char     *place = EMSG;  /* option letter processing */
        !            32:        register char   *oli;           /* option letter list index */
        !            33:        char    *index();
        !            34: 
        !            35:        if(!*place) {                   /* update scanning pointer */
        !            36:                if(optind >= nargc || *(place = nargv[optind]) != '-' || !*++place) return(EOF);
        !            37:                if (*place == '-') {    /* found "--" */
        !            38:                        ++optind;
        !            39:                        return(EOF);
        !            40:                }
        !            41:        }                               /* option letter okay? */
        !            42:        if ((optopt = (int)*place++) == (int)':' || !(oli = index(ostr,optopt))) {
        !            43:                if(!*place) ++optind;
        !            44:                tell(": illegal option -- ");
        !            45:        }
        !            46:        if (*++oli != ':') {            /* don't need argument */
        !            47:                optarg = NULL;
        !            48:                if (!*place) ++optind;
        !            49:        }
        !            50:        else {                          /* need an argument */
        !            51:                if (*place) optarg = place;     /* no white space */
        !            52:                else if (nargc <= ++optind) {   /* no arg */
        !            53:                        place = EMSG;
        !            54:                        tell(": option requires an argument -- ");
        !            55:                }
        !            56:                else optarg = nargv[optind];    /* white space */
        !            57:                place = EMSG;
        !            58:                ++optind;
        !            59:        }
        !            60:        return(optopt);                 /* dump back option letter */
        !            61: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.