---
name: "TIFFWarning"
section: "3t"
platform: "linux"
package: "libtiff3g-dev"
version: "3.5.5-6.woody5"
release: "Debian 3.0 (Woody)"
platforms: ["linux"]
url: "https://new.carta.tech/TIFFWarning"
---

# TIFFWarning(3t)

library warning interface

## NAME

TIFFWarning, TIFFSetWarningHandler - library warning interface

## SYNOPSIS

**#include \<tiffio.h\>**\
 **void TIFFWarning(const char\* module, const char\* fmt, ...)**

**#include \<stdargh.h\>**\
 **typedef void (\*TIFFWarningHandler)(const char\* module, const char\* fmt, va\_list ap);**\
 **TIFFWarningHandler TIFFSetWarningHandler(TIFFWarningHandler handler);**

## DESCRIPTION

*TIFFWarning* invokes the library-wide warning handler function to (normally) write a warning message to the **stderr**. The *fmt* parameter is a *printf*(3S) format string, and any number arguments can be supplied. The *module* parameter is interpreted as a string that, if non-zero, should be printed before the message; it typically is used to identify the software module in which a warning is detected.

Applications that desire to capture control in the event of a warning should use *TIFFSetWarningHandler* to override the default warning handler. A NULL (0) warning handler function may be installed to suppress error messages.

## RETURN VALUES

*TIFFSetWarningHandler* returns a reference to the previous error handling function.

## SEE ALSO

*libtiff*(3T), *TIFFError*(3T), *printf*(3S)