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Annotation of pgp/src/getopt.c, revision 1.1.1.7

1.1.1.7 ! root        1: /*
        !             2:    **   @(#)getopt.c    2.5 (smail) 9/15/87
        !             3:  */
        !             4: 
        !             5: /*
        !             6:    *  This is the AT&T public domain source for getopt(3).  It is the code
        !             7:    *  which was given out at the 1985 UNIFORUM conference in Dallas.
        !             8:    *   
        !             9:    *  There is no manual page.  That is because the one they gave out at
        !            10:    *  UNIFORUM was slightly different from the current System V Release 2
        !            11:    *  manual page.  The difference apparently involved a note about the
        !            12:    *  famous rules 5 and 6, recommending using white space between an
        !            13:    *  option and its first argument, and not grouping options that have
        !            14:    *  arguments.  Getopt itself is currently lenient about both of these
        !            15:    *  things.  White space is allowed, but not mandatory, and the last option
        !            16:    *  in a group can have an argument.  That particular version of the man
        !            17:    *  page evidently has no official existence.  The current SVR2 man page
        !            18:    *  reflects the actual behavor of this getopt.
        !            19:  */
        !            20: 
        !            21: #include <string.h>
        !            22: #include <stdio.h>
        !            23: #include "getopt.h"
        !            24: 
        !            25: /*LINTLIBRARY */
        !            26: #ifndef NULL
        !            27: #define NULL   0
        !            28: #endif
        !            29: #define EOF    (-1)
        !            30: #define ERR(str, chr) (opterr ? \
        !            31: fprintf(stderr, "%s%s%c\n", argv[0], str, chr) : 0)
        !            32: 
        !            33: int opterr = 1;
        !            34: int optind = 1;
        !            35: int optopt = 0;
        !            36: char *optarg = 0;
        !            37: 
        !            38: int pgp_getopt(int argc, char * const argv[], const char *opts)
        !            39: {
        !            40:     static int sp = 1;
        !            41:     register int c;
        !            42:     register char *cp;
        !            43: 
        !            44:     if (sp == 1) {
        !            45:        if (optind >= argc || (argv[optind][0] != '+' &&
        !            46:                      argv[optind][0] != '-') || argv[optind][1] == '\0')
        !            47:            return EOF;
        !            48:        else if (strcmp(argv[optind], "--") == 0) {
        !            49:            optind++;
        !            50:            return EOF;
        !            51:        }
        !            52:        /* '+' for config options, '+' should not be in the opts list */
        !            53:        if (argv[optind][0] == '+') {
        !            54:            optarg = argv[optind++] + 1;
        !            55:            return '+';
        !            56:        }
        !            57:     }
        !            58:     optopt = c = argv[optind][sp];
        !            59:     if (c == ':' || (cp = strchr(opts, c)) == NULL) {
        !            60:        ERR(": illegal option -- ", c);
        !            61:        if (argv[optind][++sp] == '\0') {
        !            62:            optind++;
        !            63:            sp = 1;
        !            64:        }
        !            65:        return '\0';
        !            66:     }
        !            67:     if (*++cp == ':') {
        !            68:        if (argv[optind][sp + 1] != '\0')
        !            69:            optarg = &argv[optind++][sp + 1];
        !            70:        else if (++optind >= argc) {
        !            71:            ERR(": option requires an argument -- ", c);
        !            72:            sp = 1;
        !            73:            return '\0';
        !            74:        } else
        !            75:            optarg = argv[optind++];
        !            76:        sp = 1;
        !            77:     } else {
        !            78:        if (argv[optind][++sp] == '\0') {
        !            79:            sp = 1;
        !            80:            optind++;
        !            81:        }
        !            82:        optarg = NULL;
        !            83:     }
        !            84:     return c;
        !            85: }

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