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#import "XADPlatform.h"
#import "NSDateXAD.h"
#import <fcntl.h>
#import <unistd.h>
#import <sys/stat.h>
#import <sys/time.h>
@implementation XADPlatform
//
// Archive entry extraction.
//
+(XADError)extractResourceForkEntryWithDictionary:(NSDictionary *)dict
unarchiver:(XADUnarchiver *)unarchiver toPath:(NSString *)destpath
{
return XADNotSupportedError;
}
+(XADError)updateFileAttributesAtPath:(NSString *)path
forEntryWithDictionary:(NSDictionary *)dict parser:(XADArchiveParser *)parser
preservePermissions:(BOOL)preservepermissions
{
const char *cpath=[path fileSystemRepresentation];
NSNumber *linknum=[dict objectForKey:XADIsLinkKey];
BOOL islink=linknum&&[linknum boolValue];
struct stat st;
if(lstat(cpath,&st)!=0) return XADOpenFileError; // TODO: better error
// If the file does not have write permissions, change this temporarily
// and remember to change back.
BOOL changedpermissions=NO;
if(!(st.st_mode&S_IWUSR))
{
if(!islink) chmod(cpath,0700);
changedpermissions=YES;
}
// Handle timestamps.
NSDate *modification=[dict objectForKey:XADLastModificationDateKey];
NSDate *access=[dict objectForKey:XADLastAccessDateKey];
if(modification||access)
{
struct timeval times[2]={
{st.st_atim.tv_sec,st.st_atim.tv_nsec/1000},
{st.st_mtim.tv_sec,st.st_mtim.tv_nsec/1000},
};
if(access) times[0]=[access timevalStruct];
if(modification) times[1]=[modification timevalStruct];
int res=lutimes(cpath,times);
if(res!=0&&res!=ENOSYS) return XADUnknownError; // TODO: better error
}
// Handle permissions (or change back to original permissions if they were changed).
NSNumber *permissions=[dict objectForKey:XADPosixPermissionsKey];
if(permissions||changedpermissions)
{
mode_t mode=st.st_mode;
if(permissions)
{
mode=[permissions unsignedShortValue];
if(!preservepermissions)
{
mode_t mask=umask(022);
umask(mask); // This is stupid. Is there no sane way to just READ the umask?
mode&=~(mask|S_ISUID|S_ISGID);
}
}
if(!islink)
if(chmod(cpath,mode&~S_IFMT)!=0) return XADUnknownError; // TODO: bette error
}
return XADNoError;
}
+(XADError)createLinkAtPath:(NSString *)path withDestinationPath:(NSString *)link
{
struct stat st;
const char *destcstr=[path fileSystemRepresentation];
if(lstat(destcstr,&st)==0) unlink(destcstr);
if(symlink([link fileSystemRepresentation],destcstr)!=0) return XADLinkError;
return XADNoError;
}
//
// Archive post-processing.
//
+(id)readCloneableMetadataFromPath:(NSString *)path { return nil; }
+(void)writeCloneableMetadata:(id)metadata toPath:(NSString *)path {}
+(BOOL)copyDateFromPath:(NSString *)src toPath:(NSString *)dest
{
struct stat st;
const char *csrc=[src fileSystemRepresentation];
if(stat(csrc,&st)!=0) return NO;
struct timeval times[2]={
{st.st_atim.tv_sec,st.st_atim.tv_nsec/1000},
{st.st_mtim.tv_sec,st.st_mtim.tv_nsec/1000},
};
const char *cdest=[dest fileSystemRepresentation];
if(utimes(cdest,times)!=0) return NO;
return YES;
}
+(BOOL)resetDateAtPath:(NSString *)path
{
const char *cpath=[path fileSystemRepresentation];
if(utimes(cpath,NULL)!=0) return NO;
return YES;
}
//
// Path functions.
//
+(NSString *)uniqueDirectoryPathWithParentDirectory:(NSString *)parent
{
// TODO: ensure this path is actually unique.
NSDate *now=[NSDate date];
int64_t t=[now timeIntervalSinceReferenceDate]*1000000000;
pid_t pid=getpid();
NSString *dirname=[NSString stringWithFormat:@"XADTemp%qd%d",t,pid];
if(parent) return [parent stringByAppendingPathComponent:dirname];
else return dirname;
}
+(NSString *)sanitizedPathComponent:(NSString *)component
{
if([component rangeOfString:@"/"].location==NSNotFound&&
[component rangeOfString:@"\000"].location==NSNotFound) return component;
NSMutableString *newstring=[NSMutableString stringWithString:component];
[newstring replaceOccurrencesOfString:@"/" withString:@"_" options:0 range:NSMakeRange(0,[newstring length])];
[newstring replaceOccurrencesOfString:@"\000" withString:@"_" options:0 range:NSMakeRange(0,[newstring length])];
return newstring;
}
//
// Time functions.
//
+(double)currentTimeInSeconds
{
struct timeval tv;
gettimeofday(&tv,NULL);
return (double)tv.tv_sec+(double)tv.tv_usec/1000000.0;
}
@end
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