1 #include <u.h> 2 #include <libc.h> 3 4 char* 5 get9root(void) 6 { 7 static char *s; 8 9 if(s) 10 return s; 11 12 if((s = getenv("PLAN9")) != 0) 13 return s; 14 s = PLAN9_TARGET; 15 return s; 16 }