I am using povray 3.50c for linux. When I try to start povray remotely on
an other linux box with rsh,

rsh computer povray options

povray segfaults. The problem seems to be theese lines in unix.cpp:

  1840    /* if this isn't actually a TTY, no need for SVGA */
  1841    if (!strstr(ttyname(0), "tty"))
  1842      {
  1843        return (false);
  1844      }

It seems that ttyname returns NULL when run with rsh (maybe there is no real tty?),
and then strstr segfaults. Something similar occurs when I run a script
that does some calculations and then start povray. If I log out before povray is
started
povray crashes, for the same reason, I think.

Inserting the lines:

 if (ttyname(0) == NULL)
    return (false);

before the lines above seems to solve the problem, at least in the first case.
The manpage for ttyname says it returns NULL if an error occurs.
Comments?

Fredrik

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