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Adds support for maintaining file permissions when compressing and decompressing

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This commit is contained in:
Joshua Garnham
2013-06-25 17:11:08 +01:00
parent 548b3acbba
commit c91865d01b
1 changed files with 44 additions and 6 deletions
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SSZipArchive.m
+44 -6
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@@ -199,10 +199,31 @@
if (attr) {
if ([fileManager setAttributes:attr ofItemAtPath:fullPath error:nil] == NO) {
// Can't set attributes
NSLog(@"[SSZipArchive] Failed to set attributes");
NSLog(@"[SSZipArchive] Failed to set attributes - whilst setting modification date");
}
}
}
// Set the original permissions on the file
if (fileInfo.external_fa != 0) {
// Get the permissions
uLong permissions = fileInfo.external_fa >> 16;
// Store it into a NSNumber
NSNumber *permissionsValue = @(permissions);
// Retrieve any existing attributes
NSMutableDictionary *attrs = [[NSMutableDictionary alloc] initWithDictionary:[fileManager attributesOfItemAtPath:fullPath error:nil]];
// Set the value in the attributes dict
attrs[NSFilePosixPermissions] = permissionsValue;
// Update attributes
if ([fileManager setAttributes:attrs ofItemAtPath:fullPath error:nil] == NO) {
// Unable to set the permissions attribute
NSLog(@"[SSZipArchive] Failed to set attributes - whilst setting permissions");
}
}
}
}
else
@@ -392,11 +413,28 @@
NSDictionary *attr = [[NSFileManager defaultManager] attributesOfItemAtPath:path error: nil];
if( attr )
{
NSDate *fileDate = (NSDate *)[attr objectForKey:NSFileModificationDate];
if( fileDate )
{
[self zipInfo:&zipInfo setDate: fileDate ];
}
NSDate *fileDate = (NSDate *)[attr objectForKey:NSFileModificationDate];
if( fileDate )
{
[self zipInfo:&zipInfo setDate: fileDate ];
}
// Write permissions into the external attributes, for details on this see here: http://unix.stackexchange.com/a/14727
// Get the permissions value from the files attributes
NSNumber *permissionsValue = (NSNumber *)[attr objectForKey:NSFilePosixPermissions];
if (permissionsValue) {
// Get the short value for the permissions
short permissionsShort = permissionsValue.shortValue;
// Convert this into an octal by adding 010000, 010000 being the flag for a regular file
NSInteger permissionsOctal = 0100000 + permissionsShort;
// Convert this into a long value
uLong permissionsLong = @(permissionsOctal).unsignedLongValue;
// Store this into the external file attributes once it has been shifted 16 places left to form part of the second from last byte
zipInfo.external_fa = permissionsLong << 16L;
}
}
zipOpenNewFileInZip(_zip, afileName, &zipInfo, NULL, 0, NULL, 0, NULL, Z_DEFLATED, Z_DEFAULT_COMPRESSION);