.\"     $NetBSD: util.3,v 1.27 2019/03/08 08:12:39 msaitoh Exp $
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.\" by Gregory McGarry.
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.Dd March 31, 2017
.Dt UTIL 3
.Os
.Sh NAME
.Nm util ,
.Nm libutil
.Nd system utilities library
.Sh LIBRARY
.Lb libutil
.Sh DESCRIPTION
The
.Nm
library is the system utilities library and contains various
system-dependent utility routines used in a wide variety of system daemons.
The abstracted functions are mostly related to pseudo-terminals
and login accounting.
These routines are
.Nx Ns -specific
and are not portable.
Their use should be restricted.
.Pp
Declarations for these functions may be obtained from the include file
.In util.h .
The
.Nm
library and the associated functions are implemented within the
.Pa /usr/src/lib/libutil
directory.
.Sh LIST OF FUNCTIONS
.Bl -column ".Xr sockaddr_snprintf 3" -compact
.It Sy Name Ta Sy Description
.It Xr disklabel_dkcksum 3 Ta compute the checksum for a disklabel
.It Xr disklabel_scan 3 Ta scan a buffer for a valid disklabel
.It Xr efun 3 Ta error checked utility functions
.It Xr forkpty 3 Ta tty utility function
.It Xr getbootfile 3 Ta get the name of the booted kernel file
.It Xr getbyteorder 3 Ta get the current byte order
.It Xr getdiskrawname 3 Ta get the block/character device name for a disk
.It Xr getfsspecname 3 Ta get the underlying wedge name from a label
.It Xr getfstypename 3 Ta convert a partition file system type integer to a wedge
partition type name
.It Xr getlabeloffset 3 Ta get the sector number and offset of the disklabel
.It Xr getlabelsector 3 Ta get the sector number and offset of the disklabel
.It Xr getmaxpartitions 3 Ta get the maximum number of partitions allowed per disk
.It Xr getmntopts 3 Ta scan mount options
.It Xr getrawpartition 3 Ta get the system ``raw'' partition
.It Xr kinfo_getvmmap 3 Ta get per-process memory map information
.It Xr login 3 Ta login utility function
.It Xr login_cap 3 Ta query login.conf database about a user class
.It Xr login_close 3 Ta query login.conf database about a user class
.It Xr login_getcapbool 3 Ta query login.conf database about a user class
.It Xr login_getcapnum 3 Ta query login.conf database about a user class
.It Xr login_getcapsize 3 Ta query login.conf database about a user class
.It Xr login_getcapstr 3 Ta query login.conf database about a user class
.It Xr login_getcaptime 3 Ta query login.conf database about a user class
.It Xr login_getclass 3 Ta query login.conf database about a user class
.It Xr login_tty 3 Ta tty utility function
.It Xr loginx 3 Ta login utility function
.It Xr logout 3 Ta login utility function
.It Xr logoutx 3 Ta login utility function
.It Xr logwtmp 3 Ta login utility function
.It Xr logwtmpx 3 Ta login utility function
.It Xr opendisk 3 Ta open a disk partition
.It Xr openpty 3 Ta tty utility function
.It Xr pidfile 3 Ta write a daemon pid file
.It Xr pidlock 3 Ta locks based on files containing PIDs
.It Xr proc_compare 3 Ta compare two processes' interactivity
.It Xr pw_abort 3 Ta passwd file update function
.It Xr pw_copy 3 Ta utility function for interactive passwd file updates
.It Xr pw_edit 3 Ta utility function for interactive passwd file updates
.It Xr pw_error 3 Ta utility function for interactive passwd file updates
.It Xr pw_getconf 3 Ta password encryption configuration access function
.It Xr pw_getprefix 3 Ta passwd file update function
.It Xr pw_init 3 Ta utility function for interactive passwd file updates
.It Xr pw_lock 3 Ta passwd file update function
.It Xr pw_mkdb 3 Ta passwd file update function
.It Xr pw_prompt 3 Ta utility function for interactive passwd file updates
.It Xr pw_scan 3 Ta utility function for interactive passwd file updates
.It Xr pw_setprefix 3 Ta passwd file update function
.It Xr raise_default_signal 3 Ta raise the default signal handler
.It Xr secure_path 3 Ta determine if a file appears to be ``secure''
.It Xr setclasscontext 3 Ta query login.conf database about a user class
.It Xr setusercontext 3 Ta query login.conf database about a user class
.It Xr snprintb 3 Ta bitmask output conversion
.It Xr sockaddr_snprintf 3 Ta socket address formatting function
.It Xr strpct 3 Ta decimal percent formatter
.It Xr ttyaction 3 Ta ttyaction utility function
.It Xr ttylock 3 Ta locks based on files containing PIDs
.It Xr ttymsg 3 Ta ttymsg utility function
.It Xr ttyunlock 3 Ta locks based on files containing PIDs
.El
.Sh FILES
.Bl -tag -width /usr/lib/libutil_p.a -compact
.It Pa /usr/lib/libutil.a
static util library
.It Pa /usr/lib/libutil.so
dynamic util library
.It Pa /usr/lib/libutil_p.a
static util library compiled for profiling
.El
.Sh SEE ALSO
.Xr efun 3 ,
.Xr intro 3