In comp.unix.programmer Mark wrote:
> We have got a case where a system() function fails with errno=ECHILD.
> This problem only occurs on a productive system with Linux 2.6.9 and
> not on Linux 2.4, AIX or Solaris.

> I know one reason for this is that SICCHLD is set to SIG_IGN but this
> should not be the case here. SIGCHLD is explicity set to SIG_DFL
> using a sigaction before the call to system(). (Although it is
> normally set to SIG_IGN). There should not be any other threads
> messing about with SIGCHLD.

Do you explicitely clear out the sa_flags member of the sigaction
structure? If not you may accidentally have SA_NOCLDWAIT set in
there, which basically has the same effect as switching to SIG_IGN.

Regards, Jens
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\ Jens Thoms Toerring ___ jt@toerring.de
\__________________________ http://toerring.de