[davve@pythagoras ~/misc/clipboard]$ cat clip3.c | clip

/*
* compile: gcc clip.c -o clip `pkg-config gtk+-2.0 --cflags --libs`
*/

#include <gtk/gtk.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>

#define BUFSIZE 1024

int main(int argc, char **argv){
    GtkClipboard *clip;
    int size,len;
    char *str,*ptr;
    
    gtk_init(&argc, &argv);
    clip = gtk_clipboard_get(gdk_atom_intern("CLIPBOARD",FALSE));
    
    ptr = str = (char*)malloc(BUFSIZE);
    size=BUFSIZE;
    len=0;
    while((len=read(0,ptr,BUFSIZE-len))>0){
        if(len==BUFSIZE){
            size+=BUFSIZE;
            str = (char*)realloc(str,size);
            ptr = str + size - BUFSIZE;
            len=0;
        }else{
            ptr+=len;
        }
    }
    
    gtk_clipboard_set_text(clip, str, -1);
    gtk_clipboard_store(clip);
    return 0;
}