PetscOptionsGetenv#
Gets an environmental variable, broadcasts to all processors in communicator from MPI rank zero
Synopsis#
PetscErrorCode PetscOptionsGetenv(MPI_Comm comm, const char name[], char env[], size_t len, PetscBool *flag)
Collective
Input Parameters#
comm - communicator to share variable
name - name of environmental variable
len - amount of space allocated to hold variable
Output Parameters#
flag - if not NULL tells if variable found or not
env - value of variable
Notes#
You can also “set” the environmental variable by setting the options database value
-name “stringvalue” (with name in lower case). If name begins with PETSC_ this is
discarded before checking the database. For example, PETSC_VIEWER_SOCKET_PORT
would
be given as -viewer_socket_port 9000
If comm does not contain the 0th process in the MPIEXEC it is likely on many systems that the environmental variable will not be set unless you put it in a universal location like a .chsrc file
Level#
advanced
Location#
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages