gistfile1.c

#include <unistd.h>
#include <stdio.h>

int main(int argc, const char **argv)
{
    char c[10240] = {0};
    int fd;

    sscanf(argv[1] + 8, "%i", &fd);    // skip "/dev/fd/"
    read(fd, c, 10239);
    puts(c);
}