petsc-3.13.6 2020-09-29

PetscOptionsInsert

Inserts into the options database from the command line, the environmental variable and a file.

Synopsis

#include "petscsys.h"   
PetscErrorCode PetscOptionsInsert(PetscOptions options,int *argc,char ***args,const char file[])

Collective on PETSC_COMM_WORLD

Input Parameters

	options	- options database or NULL for the default global database
	argc	- count of number of command line arguments
	args	- the command line arguments
	file	- optional filename, defaults to ~username/.petscrc

Note

Since PetscOptionsInsert() is automatically called by PetscInitialize(), the user does not typically need to call this routine. PetscOptionsInsert() can be called several times, adding additional entries into the database.

Options Database Keys

	-options_monitor <optional filename>	- print options names and values as they are set
	-options_file <filename>	- read options from a file

Level

advanced

Location

src/sys/objects/options.c

Examples

src/sys/tutorials/ex19.c.html
src/snes/tutorials/ex22.c.html
src/snes/tutorials/ex30.c.html

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