'\" t
.\"     Title: kstrtoll
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Basic C Library Functions
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "KSTRTOLL" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Basic C Library Functions"
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.SH "NAME"
kstrtoll \- convert a string to a long long
.SH "SYNOPSIS"
.HP \w'int\ kstrtoll('u
.BI "int kstrtoll(const\ char\ *\ " "s" ", unsigned\ int\ " "base" ", long\ long\ *\ " "res" ");"
.SH "ARGUMENTS"
.PP
\fIs\fR
.RS 4
The start of the string\&. The string must be null\-terminated, and may also include a single newline before its terminating null\&. The first character may also be a plus sign or a minus sign\&.
.RE
.PP
\fIbase\fR
.RS 4
The number base to use\&. The maximum supported base is 16\&. If base is given as 0, then the base of the string is automatically detected with the conventional semantics \- If it begins with 0x the number will be parsed as a hexadecimal (case insensitive), if it otherwise begins with 0, it will be parsed as an octal number\&. Otherwise it will be parsed as a decimal\&.
.RE
.PP
\fIres\fR
.RS 4
Where to write the result of the conversion on success\&.
.RE
.SH "DESCRIPTION"
.PP
Returns 0 on success, \-ERANGE on overflow and \-EINVAL on parsing error\&. Used as a replacement for the obsolete simple_strtoull\&. Return code must be checked\&.
.SH "COPYRIGHT"
.br