.TH LIB 10
.SH NAME
lib \- C library functions used by the kernel
.SH SYNOPSIS
.B
#include "../port/lib.h"
.SH DESCRIPTION
A small collection of functions from the normal Plan 9 C
library is used in the kernel.
Only a subset is made available by declarations in
.BR lib.h ,
which must be included instead of the usual
.BR <libc.h> .
Here is a list of the manual pages, and the functions from them declared
by
.B lib.h
for kernel use:
.IR
.TP
.IR abs (2)
.br
.I abs
.TP
.IR atoi (2)
.br
.IR atoi ,
.IR strtol ,
.IR strtoul ,
.IR strtoll ,
and
.I strtoull
.TP
.IR cleanname (2)
.br
.I cleanname
.TP
.IR encode (2)
.IR dec64
and
.I encodefmt
.TP
.IR fmtinstall (2)
.br
.BR Fmt ,
.IR fmtinstall ,
.IR fmtprint
and
.IR fmtstrcpy
.TP
.I getcallerpc (2)
.br
.I getcallerpc
.TP
.I getfields (2)
.br
.I getfields
and
.I tokenize
(see also
.IR parsecmd (10))
.TP
.IR quote (2)
.br
for
.IR quotefmtinstall
.TP
.IR print (2)
.br
.IR print ,
.IR seprint ,
.IR snprint ,
.IR sprint ,
.IR vseprint
and
.IR vsnprint ,
.TP
.IR memory (2)
.br
.IR memccpy ,
.IR memchr ,
.IR memcmp ,
.IR memmove
and
.IR memset
.TP
.IR rune (2)
.br
.IR chartorune ,
.IR runetochar ,
.IR runelen ,
.IR utflen
and
.IR utfrune
.TP
.IR open (2)
.br
values
.BR OCEXEC ,
.BR OEXCL ,
.BR OEXEC ,
.BR ORCLOSE ,
.BR ORDWR ,
.BR OREAD ,
.BR OTRUNC
and
.BR OWRITE ,
.TP
.IR stat (2)
.br
data structures
.BR Dir
and
.BR Qid ,
and values
.B DMDIR
etc.
and
.B QTDIR
etc.
.TP
.IR strcat (2)
.br
.IR strcat ,
.IR strchr ,
.IR strcmp ,
.IR strcpy ,
.IR strecpy ,
.IR strlen ,
.IR strncat ,
.IR strncmp ,
.IR strncpy ,
.IR strrchr
and
.IR strstr
.TP
.IR wait (2)
.br
data structure
.B Waitmsg
.PP
.B lib.h
also defines
.B ERRMAX
(the limit in bytes for error strings)
and
.B KNAMELEN
(fixed-length limit in bytes for device driver file names)
.PP
A few other libraries such as
.IR memdraw (2)
and
.IR mp (2)
are called by specialised kernel components and drivers but they use
the normal include file for each library.