mirror of
https://gitlab.isc.org/isc-projects/bind9
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c3cfdb9670
Turn the static check_bad_bits() function used by both Unix and Windows
systems into a "private" function and extract the "private" parts of
lib/isc/fsaccess.c to lib/isc/fsaccess_common_p.h. Instead of including
lib/isc/fsaccess.c from lib/isc/{unix,win32}/fsaccess.c, make the former
an independent C source file.
Rename lib/isc/fsaccess.c to lib/isc/fsaccess_common.c to prevent build
issues on Windows caused by multiple source files (lib/isc/fsaccess.c,
lib/isc/win32/fsaccess.c) being compiled into the same object file.
These changes improve consistency with the way "private" functions and
macros are treated elsewhere in the source tree.
85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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#include <errno.h>
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#include <stdbool.h>
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#include <sys/stat.h>
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#include <isc/fsaccess.h>
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#include <isc/result.h>
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#include <isc/types.h>
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#include <isc/util.h>
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#include "../fsaccess_common_p.h"
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#include "errno2result.h"
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isc_result_t
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isc_fsaccess_set(const char *path, isc_fsaccess_t access) {
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struct stat statb;
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mode_t mode;
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bool is_dir = false;
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isc_fsaccess_t bits;
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isc_result_t result;
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if (stat(path, &statb) != 0) {
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return (isc__errno2result(errno));
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}
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if ((statb.st_mode & S_IFDIR) != 0) {
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is_dir = true;
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} else if ((statb.st_mode & S_IFREG) == 0) {
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return (ISC_R_INVALIDFILE);
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}
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result = isc__fsaccess_check_bad_bits(access, is_dir);
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if (result != ISC_R_SUCCESS) {
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return (result);
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}
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/*
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* Done with checking bad bits. Set mode_t.
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*/
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mode = 0;
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#define SET_AND_CLEAR1(modebit) \
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if ((access & bits) != 0) { \
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mode |= modebit; \
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access &= ~bits; \
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}
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#define SET_AND_CLEAR(user, group, other) \
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SET_AND_CLEAR1(user); \
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bits <<= STEP; \
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SET_AND_CLEAR1(group); \
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bits <<= STEP; \
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SET_AND_CLEAR1(other);
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bits = ISC_FSACCESS_READ | ISC_FSACCESS_LISTDIRECTORY;
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SET_AND_CLEAR(S_IRUSR, S_IRGRP, S_IROTH);
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bits = ISC_FSACCESS_WRITE | ISC_FSACCESS_CREATECHILD |
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ISC_FSACCESS_DELETECHILD;
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SET_AND_CLEAR(S_IWUSR, S_IWGRP, S_IWOTH);
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bits = ISC_FSACCESS_EXECUTE | ISC_FSACCESS_ACCESSCHILD;
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SET_AND_CLEAR(S_IXUSR, S_IXGRP, S_IXOTH);
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INSIST(access == 0);
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if (chmod(path, mode) < 0) {
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return (isc__errno2result(errno));
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}
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return (ISC_R_SUCCESS);
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}
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