waitpid and strace -f

[Alexander V. Lukyanov]

The following program receives ECHILD for waitpid when it is run with
`strace -f'. WNOHANG and `-f' are required. I'm not sure if it is
kernel or strace problem. kernel 2.2.14, glibc-2.1.2-11,
strace-3.99.1-2, i686.

#include <sys/types.h>
#include <sys/wait.h>

int main()
{
   int st;
   int pid;
   pid=fork();
   if(pid==0)
      _exit(0);
   if(waitpid(pid,&st,WNOHANG)==-1)
      perror("waitpid");
   return 0;
}

   Alexander.

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