:orphan:
# TaoLineSearchGetOptionsPrefix
Gets the prefix used for searching for all `TaoLineSearch` options in the database 
## Synopsis
```
#include "petsctaolinesearch.h" 
PetscErrorCode TaoLineSearchGetOptionsPrefix(TaoLineSearch ls, const char *p[])
```
Not Collective


## Input Parameter

- ***ls -*** the `TaoLineSearch` context



## Output Parameter

- ***prefix -*** pointer to the prefix string used is returned





## Fortran Note
The user should pass in a string 'prefix' of
sufficient length to hold the prefix.


## See Also
 [](ch_tao), `Tao`, `TaoLineSearch`, `TaoLineSearchSetOptionsPrefix()`, `TaoLineSearchAppendOptionsPrefix()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/linesearch/interface/taolinesearch.c.html#TaoLineSearchGetOptionsPrefix">src/tao/linesearch/interface/taolinesearch.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/tao/linesearch/interface/taolinesearch.c)


[Index of all TaoLineSearch routines](index.md)  
[Table of Contents for all manual pages](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)