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

# firestring\_estr\_vsprintf(3)

snprintf(3) into an estring

## NAME

firestring\_estr\_vsprintf - [**snprintf**(3)](/snprintf/3.md) into an estring

## SYNOPSIS

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

**long firestring\_estr\_vsprintf(struct firestring\_estr\_t \****out***, const char \* const** *format***, va\_list** *ap***)**

## DESCRIPTION

firestring\_estr\_vsprintf() behaves exactly like [**firestring\_snprintf**(3)](/firestring_snprintf/3.md) except that it writes to an estring (which contains the size internally, so size is not needed as a parameter), and it takes an stdarg object instead of a list of arguments.

## RETURN VALUE

Returns the number of bytes written to *out*.

## AUTHOR

Ian Gulliver \<ian@penguinhosting.net\>

## SEE ALSO

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