ref: a351bcdccdf5a4273bc8dc3360a48fbb8b8aa9ea
dir: /src/after.c/
#include <u.h> #include <libc.h> void main(int, char*[]) { int fd; if (fork() == 0){ fd = open("afile", OWRITE); write(fd, "child\n", 6); } else { fd = open("afile", OWRITE); write(fd, "dad\n", 4); } close(fd); exits(nil); }