[O-MPI users] mpirun sets umask to 0

[Glenn Morris]

mpirun (v1.0.1) sets the umask to 0, and hence creates world-writable
output files. Interestingly, adding the -d option to mpirun makes this
problem go away. To reproduce:

mpirun -np 1 --hostfile ./hostfile --mca pls_rsh_agent ssh ./a.out

where a.out is compiled from:

#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
int main ()
{
    printf("%.4o\n", umask( 022 ) );
    return 0;
}