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Annotation of embedaddon/ntp/lib/isc/unix/fsaccess.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (C) 2004-2007  Internet Systems Consortium, Inc. ("ISC")
        !             3:  * Copyright (C) 2000, 2001  Internet Software Consortium.
        !             4:  *
        !             5:  * Permission to use, copy, modify, and/or distribute this software for any
        !             6:  * purpose with or without fee is hereby granted, provided that the above
        !             7:  * copyright notice and this permission notice appear in all copies.
        !             8:  *
        !             9:  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
        !            10:  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
        !            11:  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
        !            12:  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
        !            13:  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
        !            14:  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
        !            15:  * PERFORMANCE OF THIS SOFTWARE.
        !            16:  */
        !            17: 
        !            18: /* $Id: fsaccess.c,v 1.13 2007/06/19 23:47:18 tbox Exp $ */
        !            19: 
        !            20: #include <config.h>
        !            21: 
        !            22: #include <sys/types.h>
        !            23: #include <sys/stat.h>
        !            24: 
        !            25: #include <errno.h>
        !            26: 
        !            27: #include "errno2result.h"
        !            28: 
        !            29: /*! \file
        !            30:  * \brief
        !            31:  * The OS-independent part of the API is in lib/isc.
        !            32:  */
        !            33: #include "../fsaccess.c"
        !            34: 
        !            35: isc_result_t
        !            36: isc_fsaccess_set(const char *path, isc_fsaccess_t access) {
        !            37:        struct stat statb;
        !            38:        mode_t mode;
        !            39:        isc_boolean_t is_dir = ISC_FALSE;
        !            40:        isc_fsaccess_t bits;
        !            41:        isc_result_t result;
        !            42: 
        !            43:        if (stat(path, &statb) != 0)
        !            44:                return (isc__errno2result(errno));
        !            45: 
        !            46:        if ((statb.st_mode & S_IFDIR) != 0)
        !            47:                is_dir = ISC_TRUE;
        !            48:        else if ((statb.st_mode & S_IFREG) == 0)
        !            49:                return (ISC_R_INVALIDFILE);
        !            50: 
        !            51:        result = check_bad_bits(access, is_dir);
        !            52:        if (result != ISC_R_SUCCESS)
        !            53:                return (result);
        !            54: 
        !            55:        /*
        !            56:         * Done with checking bad bits.  Set mode_t.
        !            57:         */
        !            58:        mode = 0;
        !            59: 
        !            60: #define SET_AND_CLEAR1(modebit) \
        !            61:        if ((access & bits) != 0) { \
        !            62:                mode |= modebit; \
        !            63:                access &= ~bits; \
        !            64:        }
        !            65: #define SET_AND_CLEAR(user, group, other) \
        !            66:        SET_AND_CLEAR1(user); \
        !            67:        bits <<= STEP; \
        !            68:        SET_AND_CLEAR1(group); \
        !            69:        bits <<= STEP; \
        !            70:        SET_AND_CLEAR1(other);
        !            71: 
        !            72:        bits = ISC_FSACCESS_READ | ISC_FSACCESS_LISTDIRECTORY;
        !            73: 
        !            74:        SET_AND_CLEAR(S_IRUSR, S_IRGRP, S_IROTH);
        !            75: 
        !            76:        bits = ISC_FSACCESS_WRITE |
        !            77:               ISC_FSACCESS_CREATECHILD |
        !            78:               ISC_FSACCESS_DELETECHILD;
        !            79: 
        !            80:        SET_AND_CLEAR(S_IWUSR, S_IWGRP, S_IWOTH);
        !            81: 
        !            82:        bits = ISC_FSACCESS_EXECUTE |
        !            83:               ISC_FSACCESS_ACCESSCHILD;
        !            84: 
        !            85:        SET_AND_CLEAR(S_IXUSR, S_IXGRP, S_IXOTH);
        !            86: 
        !            87:        INSIST(access == 0);
        !            88: 
        !            89:        if (chmod(path, mode) < 0)
        !            90:                return (isc__errno2result(errno));
        !            91: 
        !            92:        return (ISC_R_SUCCESS);
        !            93: }