# SNESLineSearchGetPreCheck
Gets the pre-check function for the line search routine. 
## Synopsis
```
#include "petscsnes.h" 
PetscErrorCode SNESLineSearchGetPreCheck(SNESLineSearch linesearch, PetscErrorCode (**func)(SNESLineSearch, Vec, Vec, PetscBool *, void *), void **ctx)
```

## Input Parameter

- ***linesearch -*** the `SNESLineSearch` context



## Output Parameters

- ***func       -*** [optional] function evaluation routine, see `SNESLineSearchPreCheck` for calling sequence
- ***ctx        -*** [optional] user-defined context for private data for the function evaluation routine (may be NULL)





## See Also
 `SNESLineSearch`, `SNESGetLineSearch()`, `SNESGetLineSearch()`, `SNESLineSearchPreCheck()`, `SNESLineSearchGetPostCheck()`, `SNESLineSearchSetPreCheck()`, `SNESLineSearchSetPostCheck()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/linesearch/interface/linesearch.c.html#SNESLineSearchGetPreCheck">src/snes/linesearch/interface/linesearch.c</A>


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[Index of all SNES routines](index.md)  
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