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Annotation of 43BSDReno/usr.bin/find/option.c, revision 1.1

1.1     ! root        1: /*-
        !             2:  * Copyright (c) 1990 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * This code is derived from software contributed to Berkeley by
        !             6:  * Cimarron D. Taylor of the University of California, Berkeley.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms are permitted provided
        !             9:  * that: (1) source distributions retain this entire copyright notice and
        !            10:  * comment, and (2) distributions including binaries display the following
        !            11:  * acknowledgement:  ``This product includes software developed by the
        !            12:  * University of California, Berkeley and its contributors'' in the
        !            13:  * documentation or other materials provided with the distribution and in
        !            14:  * all advertising materials mentioning features or use of this software.
        !            15:  * Neither the name of the University nor the names of its contributors may
        !            16:  * be used to endorse or promote products derived from this software without
        !            17:  * specific prior written permission.
        !            18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            19:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            20:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            21:  */
        !            22: 
        !            23: #ifndef lint
        !            24: static char sccsid[] = "@(#)option.c   5.3 (Berkeley) 7/1/90";
        !            25: #endif /* not lint */
        !            26: 
        !            27: #include <sys/types.h>
        !            28: #include <sys/stat.h>
        !            29: #include <fts.h>
        !            30: #include <stdio.h>
        !            31: #include "find.h"
        !            32: 
        !            33: typedef struct _option {
        !            34:        char *name;             /* option name */
        !            35:        int token;              /* token value */
        !            36:        PLAN *(*create)();      /* create function */
        !            37: #define        O_NONE          0x01    /* no call required */
        !            38: #define        O_ZERO          0x02    /* pass: nothing */
        !            39: #define        O_ARGV          0x04    /* pass: argv, increment argv */
        !            40: #define        O_ARGVP         0x08    /* pass: *argv, T_OK || T_EXEC */
        !            41: #define        O_MASK          0x0f    /* mask of op bits */
        !            42: #define        O_OLD           0x10    /* deprecated syntax */
        !            43: #define        O_NEW           0x20    /* new syntax */
        !            44:        int flags;
        !            45: } OPTION;
        !            46: 
        !            47: PLAN   *c_atime(), *c_ctime(), *c_depth(), *c_exec(), *c_follow(),
        !            48:        *c_fstype(), *c_group(), *c_inum(), *c_links(), *c_ls(),
        !            49:        *c_mtime(), *c_name(), *c_newer(), *c_nogroup(), *c_nouser(),
        !            50:        *c_perm(), *c_print(), *c_prune(), *c_size(), *c_type(),
        !            51:        *c_user(), *c_xdev(), *c_openparen(), *c_closeparen(), *c_not(),
        !            52:        *c_or();
        !            53: 
        !            54: OPTION options[] = {
        !            55:        "!",            T_NOT,          c_not,          O_ZERO,
        !            56:        "(",            T_OPENPAREN,    c_openparen,    O_ZERO,
        !            57:        ")",            T_CLOSEPAREN,   c_closeparen,   O_ZERO,
        !            58:        "a",            T_AND,          NULL,           O_NONE|O_OLD,
        !            59:        "and",          T_AND,          NULL,           O_NONE|O_NEW,
        !            60:        "atime",        T_ATIME,        c_atime,        O_ARGV,
        !            61:        "ctime",        T_CTIME,        c_ctime,        O_ARGV,
        !            62:        "depth",        T_DEPTH,        c_depth,        O_ZERO|O_OLD,
        !            63:        "exec",         T_EXEC,         c_exec,         O_ARGVP,
        !            64:        "follow",       T_FOLLOW,       c_follow,       O_ZERO|O_OLD,
        !            65:        "fstype",       T_FSTYPE,       c_fstype,       O_ARGV,
        !            66:        "group",        T_GROUP,        c_group,        O_ARGV,
        !            67:        "inum",         T_INUM,         c_inum,         O_ARGV,
        !            68:        "links",        T_LINKS,        c_links,        O_ARGV,
        !            69:        "ls",           T_LS,           c_ls,           O_ZERO,
        !            70:        "mtime",        T_MTIME,        c_mtime,        O_ARGV,
        !            71:        "name",         T_NAME,         c_name,         O_ARGV,
        !            72:        "newer",        T_NEWER,        c_newer,        O_ARGV,
        !            73:        "nogroup",      T_NOGROUP,      c_nogroup,      O_ZERO,
        !            74:        "nouser",       T_NOUSER,       c_nouser,       O_ZERO,
        !            75:        "o",            T_OR,           c_or,           O_ZERO|O_OLD,
        !            76:        "ok",           T_OK,           c_exec,         O_ARGVP,
        !            77:        "or",           T_OR,           c_or,           O_ZERO|O_NEW,
        !            78:        "perm",         T_PERM,         c_perm,         O_ARGV,
        !            79:        "print",        T_PRINT,        c_print,        O_ZERO,
        !            80:        "prune",        T_PRUNE,        c_prune,        O_ZERO,
        !            81:        "size",         T_SIZE,         c_size,         O_ARGV,
        !            82:        "type",         T_TYPE,         c_type,         O_ARGV,
        !            83:        "user",         T_USER,         c_user,         O_ARGV,
        !            84:        "xdev",         T_XDEV,         c_xdev,         O_ZERO|O_OLD,
        !            85:        { NULL },
        !            86: };
        !            87: 
        !            88: /*
        !            89:  * find_create --
        !            90:  *     create a node corresponding to a command line argument.
        !            91:  *
        !            92:  * TODO:
        !            93:  *     add create/process function pointers to node, so we can skip
        !            94:  *     this switch stuff.
        !            95:  */
        !            96: PLAN *
        !            97: find_create(argvp)
        !            98:        char ***argvp;
        !            99: {
        !           100:        extern int deprecated;
        !           101:        register OPTION *p;
        !           102:        OPTION tmp;
        !           103:        PLAN *new;
        !           104:        char **argv;
        !           105:        int typecompare();
        !           106: 
        !           107:        argv = *argvp;
        !           108:        tmp.name = *argv++;
        !           109: 
        !           110:        /* strip off any leading dash */
        !           111:        if (*tmp.name == '-')
        !           112:                ++tmp.name;
        !           113: 
        !           114:        p = (OPTION *)bsearch(&tmp, options, sizeof(options)/sizeof(OPTION),
        !           115:            sizeof(OPTION), typecompare);
        !           116:        if (!p || deprecated && p->flags&O_NEW ||
        !           117:            !deprecated && p->flags&O_OLD) {
        !           118:                (void)fprintf(stderr, "find: unknown option %s.\n", *--argv);
        !           119:                exit(1);
        !           120:        }
        !           121:        if (p->flags & (O_ARGV|O_ARGVP) && !*argv) {
        !           122:                (void)fprintf(stderr,
        !           123:                    "find: %s requires additional arguments.\n", *--argv);
        !           124:                exit(1);
        !           125:        }
        !           126: 
        !           127:        switch(p->flags&O_MASK) {
        !           128:        case O_NONE:
        !           129:                new = NULL;
        !           130:                break;
        !           131:        case O_ZERO:
        !           132:                new = (p->create)();
        !           133:                break;
        !           134:        case O_ARGV:
        !           135:                new = (p->create)(*argv++);
        !           136:                break;
        !           137:        case O_ARGVP:
        !           138:                new = (p->create)(&argv, p->token == T_OK);
        !           139:                break;
        !           140:        }
        !           141:        *argvp = argv;
        !           142:        return(new);
        !           143: }
        !           144: 
        !           145: typecompare(a, b)
        !           146:        OPTION *a, *b;
        !           147: {
        !           148:        return(strcmp(a->name, b->name));
        !           149: }

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