35   char       *str, work[256];  in PetscOptionsGetenv()  local
58         str = getenv(name);  in PetscOptionsGetenv()
59         if (str) flg = PETSC_TRUE;  in PetscOptionsGetenv()
60         if (str && env) PetscCall(PetscStrncpy(env, str, len));  in PetscOptionsGetenv()
104   const char *str;  in PetscSetDisplay()  local
115   str = getenv("DISPLAY");  in PetscSetDisplay()
116   if (!str) str = ":0.0";  in PetscSetDisplay()
126     str = ":15";  in PetscSetDisplay()
129   if (str[0] != ':' || singlehost) {  in PetscSetDisplay()
130     PetscCall(PetscStrncpy(display, str, sizeof(display)));  in PetscSetDisplay()
133     PetscCall(PetscStrlcat(display, str, sizeof(display)));  in PetscSetDisplay()