---
name: "firestring_vfprintfe"
section: "3"
platform: "linux"
package: "libfirestring-dev"
version: "0.9.12-8"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/firestring_vfprintfe"
---

# firestring\_vfprintfe(3)

firestring\_vfprintf(3) with an estring format

## NAME

firestring\_vfprintfe - [**firestring\_vfprintf**(3)](/firestring_vfprintf/3.md) with an estring format

## SYNOPSIS

**#include \<firestring.h\>**\
 **-lfirestring**

**long firestring\_vfprintfe(FILE \*** *stream***, struct firestring\_estr\_t \****format***, va\_list** *ap***)**

## DESCRIPTION

firestring\_vfprintfe() behaves exactly like [**firestring\_vfprintf**(3)](/firestring_vfprintf/3.md) except that it takes an estring format argument, so the format can contain arbitrary binary data.  However, please note that user user-input data as the format string is **INSECURE**.

## RETURN VALUE

Returns the number of bytes written.

## AUTHOR

Ian Gulliver \<ian@penguinhosting.net\>

## SEE ALSO

[**libfirestring**(3)](/libfirestring/3.md)