mirror of
https://github.com/samsonjs/arq_restore.git
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103 lines
4.1 KiB
Objective-C
103 lines
4.1 KiB
Objective-C
/*
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Copyright (c) 2009-2017, Haystack Software LLC https://www.arqbackup.com
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the names of PhotoMinds LLC or Haystack Software, nor the names of
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their contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/stat.h>
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#include <stdio.h>
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#import "FileACL.h"
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#import "NSError_extra.h"
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@implementation FileACL
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+ (BOOL)aclText:(NSString **)aclText forFile:(NSString *)path error:(NSError **)error {
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*aclText = nil;
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const char *pathChars = [path fileSystemRepresentation];
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acl_t acl = acl_get_link_np(pathChars, ACL_TYPE_EXTENDED);
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if (!acl) {
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if (errno != ENOENT) {
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int errnum = errno;
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HSLogError(@"acl_get_link_np(%@) error %d: %s", path, errnum, strerror(errnum));
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SETNSERROR(@"UnixErrorDomain", errnum, @"failed to get ACL of %@: %s", path, strerror(errnum));
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return NO;
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}
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} else {
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char *aclTextChars = acl_to_text(acl, NULL);
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if (!aclTextChars) {
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acl_free(acl);
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int errnum = errno;
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HSLogError(@"acl_to_text from %@ error %d: %s", path, errnum, strerror(errnum));
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SETNSERROR(@"UnixErrorDomain", errnum, @"failed to convert ACL of %@ to text: %s", path, strerror(errnum));
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return NO;
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}
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*aclText = [NSString stringWithUTF8String:aclTextChars];
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acl_free(aclTextChars);
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acl_free(acl);
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}
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return YES;
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}
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+ (BOOL)writeACLText:(NSString *)aclText toFile:(NSString *)path error:(NSError **)error {
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HSLogDebug(@"applying ACL %@ to %@", aclText, path);
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const char *pathChars = [path fileSystemRepresentation];
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acl_t acl = acl_from_text([aclText UTF8String]);
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if (!acl) {
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int errnum = errno;
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HSLogError(@"acl_from_text(%@) error %d: %s", aclText, errnum, strerror(errnum));
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SETNSERROR(@"UnixErrorDomain", errnum, @"failed to convert ACL text '%@' to ACL: %s", aclText, strerror(errnum));
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return NO;
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}
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BOOL ret = NO;
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struct stat st;
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if (lstat(pathChars, &st) == -1) {
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int errnum = errno;
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HSLogError(@"lstat(%@) error %d: %s", path, errnum, strerror(errnum));
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SETNSERROR(@"UnixErrorDomain", errnum, @"%@: %s", path, strerror(errnum));
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goto writeACLText_error;
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}
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if (S_ISLNK(st.st_mode)) {
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ret = acl_set_link_np(pathChars, ACL_TYPE_EXTENDED, acl) != -1;
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} else {
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ret = acl_set_file(pathChars, ACL_TYPE_EXTENDED, acl) != -1;
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}
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if (!ret) {
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int errnum = errno;
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HSLogError(@"acl_set(%@) error %d: %s", path, errnum, strerror(errnum));
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SETNSERROR(@"UnixErrorDomain", errnum, @"failed to set ACL '%@' on %@: %s", aclText, path, strerror(errnum));
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goto writeACLText_error;
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}
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ret = YES;
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writeACLText_error:
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acl_free(acl);
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return ret;
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}
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@end
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