'\" t
.\"     Title: proc_dostring
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: June 2017
.\"    Manual: The proc filesystem
.\"    Source: Kernel Hackers Manual 4.11.3
.\"  Language: English
.\"
.TH "PROC_DOSTRING" "9" "June 2017" "Kernel Hackers Manual 4\&.11\&" "The proc filesystem"
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.SH "NAME"
proc_dostring \- read a string sysctl
.SH "SYNOPSIS"
.HP \w'int\ proc_dostring('u
.BI "int proc_dostring(struct\ ctl_table\ *\ " "table" ", int\ " "write" ", void\ __user\ *\ " "buffer" ", size_t\ *\ " "lenp" ", loff_t\ *\ " "ppos" ");"
.SH "ARGUMENTS"
.PP
\fIstruct ctl_table * table\fR
.RS 4
the sysctl table
.RE
.PP
\fIint write\fR
.RS 4
\fBTRUE\fR
if this is a write to the sysctl file
.RE
.PP
\fIvoid __user * buffer\fR
.RS 4
the user buffer
.RE
.PP
\fIsize_t * lenp\fR
.RS 4
the size of the user buffer
.RE
.PP
\fIloff_t * ppos\fR
.RS 4
file position
.RE
.SH "DESCRIPTION"
.PP
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
\fBNULL\-terminated\fR\&. If the string is being read by the user process, it is copied and a newline \*(Aq\en\*(Aq is added\&. It is truncated if the buffer is not large enough\&.
.PP
Returns 0 on success\&.
.SH "COPYRIGHT"
.br