lib - C library functions used by the kernel #include "../port/lib.h" 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 lib.h , which must be included instead of the usual <libc.h> . Here is a list of the manual pages, and the functions from them declared by lib.h for kernel use:

abs (2)

abs

atof (2)

atoi , strtol , strtoul , strtoll , and strtoull

cleanname (2)

cleanname

encode (2) dec64 and encodefmt

fmtinstall (2)

Fmt , fmtinstall , fmtprint and fmtstrcpy

getbe (2) getbe , putbe , getle , and putle

getcallerpc (2)

getcallerpc

getfields (2)

getfields and tokenize (see also parsecmd (9))

quote (2)

for quotefmtinstall

print (2)

print , seprint , snprint , sprint , vseprint and vsnprint ,

memory (2)

memccpy , memchr , memcmp , memmove and memset

rune (2)

chartorune , runetochar , runelen , utflen and utfrune

open (2)

values OCEXEC , OEXCL , OEXEC , ORCLOSE , ORDWR , OREAD , OTRUNC and OWRITE ,

stat (2)

data structures Dir and Qid , and values DMDIR etc. and QTDIR etc.

strcat (2)

strcat , strchr , strcmp , strcpy , strecpy , strlen , strncat , strncmp , strncpy , strrchr and strstr

wait (2)

data structure Waitmsg

lib.h also defines ERRMAX (the limit in bytes for error strings) and KNAMELEN (fixed-length limit in bytes for device driver file names)

A few other libraries such as memdraw (2) and mp (2) are called by specialised kernel components and drivers but they use the normal include file for each library.