main.m

#import <Foundation/Foundation.h>
#import <dirent.h>

int main(){
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	DIR *dp = opendir("/usr/share/man/man3");
	struct dirent *dpr;
	NSFileManager *manager = [NSFileManager defaultManager];
	NSArray *output = [NSArray arrayWithObjects:
				[NSMutableArray array],
				[NSMutableArray array],
				nil];
	int i;
	while((dpr = readdir(dp)))
		[[output objectAtIndex:(dpr->d_type != 4)] addObject:[manager stringWithFileSystemRepresentation:dpr->d_name length:dpr->d_namlen]];
	for(i=0; i<2;i++){
		[[output objectAtIndex:i] sortUsingSelector:@selector(caseInsensitiveCompare:)];
		for(NSString *name in [output objectAtIndex:i])
			NSLog(@"%@", name);
	}
	[pool release]; return 0;
}