Re: RPC protocol problem?
Jukka Ukkonen (Jukka.Ukkonen@csc.fi)
Thu, 25 Aug 1994 15:03:03 +0300 (EET DST)
Quoting Eric Conrad:
#
# > I don't have an exploit script, but replacing your portmap with
# > Wietse's would probably not hurt. Heres the blurb:
#
# I can Wietse's portmapper easily under SunOS, but other
# architectures (Solaris, Irix, etc.) will not cooperate.
#
# Does anyone have any diffs or porting info? I'll post a summary.
On Irix-5.2 boxes you have to define at least this...
#if !defined(SIGCHLD) && defined(SIGCLD)
# define SIGCHLD SIGCLD
#endif
Otherwise it will generate a huge amount of zombies (<defunct>
processes) that have a PTE reserved for their exit status info
though the child process has completed long ago.
My reap()-function is also somewhat different from Wietses
original on Irix-5.2 mostly because I had to re-assign the
signal handler to ensure I can always catch SIGCHLD.
void
reap()
{
int status;
/* while (wait3(&status, WNOHANG, (struct rusage *)NULL) > 0); */
while (waitpid (-1, &status, WNOHANG) > 0);
(void) signal (SIGCHLD, reap);
}
For some reason Irix-5.x seems to need re-initialization of
the signal handler. Well, this is an old SysV practice. Of
this I am aware but it still doesn't look like a handy thing
to my tastes.
Waitpid() is there just because I wanted to use a POSIX wait-
family routine when I noticed there was something rotting in
the SIGCHLD catching.
Cheers,
// jau
------
/ Jukka A. Ukkonen, M.Sc. (tech.) Centre for Scientific Computing
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