petsc-3.3-p7 2013-05-11


Runs a program on processor zero and sends either its input or output to a file.


PetscErrorCode  PetscPOpen(MPI_Comm comm,const char machine[],const char program[],const char mode[],FILE **fp)
Logically Collective on MPI_Comm, but only process 0 runs the command

Input Parameters

comm - MPI communicator, only processor zero runs the program
machine - machine to run command on or PETSC_NULL, or string with 0 in first location
program - name of program to run
mode - either r or w

Output Parameter

fp -the file pointer where program input or output may be read or PETSC_NULL if don't care


Use PetscPClose() to close the file pointer when you are finished with it Does not work under Windows

The program string may contain ${DISPLAY}, ${HOMEDIRECTORY} or ${WORKINGDIRECTORY}; these will be replaced with relevent values.

See Also

PetscFOpen(), PetscFClose(), PetscPClose()

Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages