pbcopy

gistfile1.txt

#import <UIKit/UIKit.h>
#include <stdio.h>

#define yeah() printf("%s\n", pb.string.UTF8String)

int main() {
    @autoreleasepool
    {
        UIPasteboard *pb = [UIPasteboard generalPasteboard];

        char buf[BUFSIZ];
        fgets(buf, sizeof buf, stdin);
        char lastchar = buf[strlen(buf)-1];
        if (lastchar == '\n') {
            // read full line
            buf[strlen(buf) - 1] = '\0';
            pb.string = [NSString stringWithUTF8String:buf];
            yeah();
        } else {
            // line was truncated
        }
        return 0;
    }
}