---
name: "vscnprintf"
section: "9"
platform: "linux"
package: "linux-manual-4.9"
version: "4.9.228-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/vscnprintf"
---

# vscnprintf(9)

Format a string and place it in a buffer

## NAME

vscnprintf - Format a string and place it in a buffer

## SYNOPSIS

**int vscnprintf(char \*** *buf***, size\_t** *size***, const char \*** *fmt***, va\_list** *args***);**

## ARGUMENTS

*buf*

The buffer to place the result into

*size*

The size of the buffer, including the trailing null space

*fmt*

The format string to use

*args*

Arguments for the format string

## DESCRIPTION

The return value is the number of characters which have been written into the *buf* not including the trailing '\\0'. If *size* is == 0 the function returns 0.

If you're not already dealing with a va\_list consider using **scnprintf**.

See the **vsnprintf** documentation for format string extensions over C99.

## COPYRIGHT