---
name: "proc_dostring"
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/proc_dostring"
---

# proc\_dostring(9)

read a string sysctl

## NAME

proc\_dostring - read a string sysctl

## SYNOPSIS

**int proc\_dostring(struct ctl\_table \*** *table***, int** *write***, void \_\_user \*** *buffer***, size\_t \*** *lenp***, loff\_t \*** *ppos***);**

## ARGUMENTS

*table*

the sysctl table

*write*

**TRUE** if this is a write to the sysctl file

*buffer*

the user buffer

*lenp*

the size of the user buffer

*ppos*

file position

## DESCRIPTION

Reads/writes a string from/to the user buffer. If the kernel buffer provided is not large enough to hold the string, the string is truncated. The copied string is **NULL-terminated**. If the string is being read by the user process, it is copied and a newline '\\n' is added. It is truncated if the buffer is not large enough.

Returns 0 on success.

## COPYRIGHT