3.6   Error messages

• int info = pvm_perror (char *msg)
call pvmperror (msg, info)
  • Prints the error status of the last PVM call
  • It is similar to the Unix perror() routine
  • Example in C

    if (pvm_send (tid, msgtag) < 0)
        pvm_perror ("Step 6");                
    

  • Example in Fortran

    CALL PVMFSEND (TID, MSGTAG, IERR)
    IF (IERR .LT. 0) THEN 
       PVMFPERROR ("Step 6", INFO);                
    

• int oldval = pvm_setopt (int what, int val)
call pvmfsetopt (what, val, oldval)
  • Sets options of the PVM system
  • what = PvmAutoErr automatic error message printing on or off for subsequent PVM call by this process
  • val defines whether detection is to be turned on (1), or off (0)
  • When val value is 2, the process prints the error message and then dies
  • All stdout and stderr messages are placed in the file /tmp/pvml.<uid> on the master pvmd's host 
  • Example:

    CALL PVMFSETOPT (PVMAUTOERR, 1, INFO)
    

• int info = pvm_catchout (FILE *ff)
call pvmfcatchout (yesno, info)
  • Causes the characters printed to stdin and stdout by the sapwned task to be redirect to the file ff
    
    
  • In Fortran, allows (yesno=1) or not (yesno=0) output to be redirect to the parent's task stdout