from small one page howto to huge articles all in one place

search text in:

Which filesystem do you use?

poll results

Last additions:
using iotop to find disk usage hogs

using iotop to find disk usage hogs






average rating: 1.8 (88 votes) (1=very good 6=terrible)

May 25th. 2007:




why adblockers are bad

Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

Workaround and fixes for the current Core Dump Handling vulnerability affected kernels






average rating: 1.3 (28 votes) (1=very good 6=terrible)

April, 26th. 2006:

You are here: manpages


Section: Environments, Tables, and Troff Macros (7)
Index Return to Main Contents

BSD mandoc


libbsd - utility functions from BSD systems  


The libbsd library provides a set if compatibility macros and functions commonly found on BSD-based systems. Its purpose is to make those available on non-BSD based systems to ease portability.

The library can be used in an overlay mode, which is the preferred way, so that the code is portable and requires no modification to the original BSD code. This can be done easily with the pkg-config3 library named libbsd-overlay Or by adding the system-specific include directory with the bsd/ suffix to the list of system include paths. With gcc this could be -isystem ${includedir}/bsd In addition the LIBBSD_OVERLAY pre-processor variable needs to be defined. The includes in this case should be the usual system ones, such as In unistd.h .

The other way to use the library is to use the namespaced headers, this is less portable as it makes using libbsd mandatory and it will not work on BSD-based systems, and requires modifying original BSD code. This can be done with the pkg-config3 library named libbsd The includes in this case should be namespaced with bsd/ such as In bsd/unistd.h .

The package also provides a bsd-ctor static library that can be used to inject automatic constructors into a program so that the Fn setproctitle function gets invoked automatically at startup time. This can be done with the pkg-config3 library named libbsd-ctor  


The following are the headers provided by libbsd that extend the standard system headers. They can work in normal or overlay modes, for the former they need to be prefixed with bsd/

In bitstring.h
In err.h
In getopt.h
In libutil.h
In md5.h
In netinet/ip_icmp.h
In nlist.h
In readpassphrase.h
In stdio.h
In stdlib.h
In string.h
In stringlist.h
In sys/bitstring.h
In sys/cdefs.h
In sys/endian.h
In sys/poll.h
In sys/queue.h
In sys/time.h
In sys/tree.h
In timeconv.h
In unistd.h
In vis.h
In wchar.h

The following is a libbsd specific convenience header, that includes some of the extended headers. It only works in non-overlay mode.

In bsd/bsd.h



Some functions have been deprecated, they will emit warnings at compile time and possibly while being linked at run-time. This might be due to the functions not being portable at all to other systems, making the package not buildable there; not portable in a correct or non-buggy way; or because there are better more portable replacements now.

This is the list of currently deprecated macros and functions:

Fn fgetln
Unportable, requires assistance from the stdio layer. An implementation has to choose between leaking buffers or being reentrant for a limited amount of streams (this implementation chose the latter with a limit of 32). Use Fn getline 3 instead, which is available in many systems and required by St -p1003.1-2008 .
Fn funopen
Unportable, requires assistance from the stdio layer or some hook framework. On GNU systems the Fn fopencookie function can be used. Otherwise the code needs to be prepared for neither of these functions being available.

In addition, the MD5 set of digest funtions are now provided by the libmd companion library, so it is advised to use that instead, as the ones provided in libbsd might disappear on the next SONAME bump.  


arc4random(3bsd), bitstring(3bsd), byteorder(3bsd), closefrom(3bsd), errc(3bsd), expand_number3bsd, explicit_bzero3bsd, fgetln(3bsd), fgetwln(3bsd), flopen(3bsd), fmtcheck(3bsd), fparseln(3bsd), fpurge(3bsd), funopen(3bsd), getbsize(3bsd), getpeereid(3bsd), getprogname(3bsd), heapsort(3bsd), humanize_number3bsd, md5(3bsd), nlist(3bsd), pidfile(3bsd), queue(3bsd), radixsort(3bsd), readpassphrase(3bsd), reallocarray(3bsd), reallocf(3bsd), setmode(3bsd), setproctitle(3bsd), stringlist(3bsd), strlcpy(3bsd), strmode(3bsd), strnstr(3bsd), strtonum(3bsd), timeradd(3bsd), timeval(3bsd), tree(3bsd), unvis(3bsd), vis(3bsd), wcslcpy(3bsd).  


The libbsd project started in the Debian GNU/kFreeBSD port as a way to ease porting code from FreeBSD to the GNU-based system. Pretty early on it was generalized and a project created on for other distributions and projects to use.

It is now distributed as part of most non-BSD distributions.




Support us on Content Nation
rdf newsfeed | rss newsfeed | Atom newsfeed
- Powered by LeopardCMS - Running on Gentoo -
Copyright 2004-2020 Sascha Nitsch Unternehmensberatung GmbH
Valid XHTML1.1 : Valid CSS : buttonmaker
- Level Triple-A Conformance to Web Content Accessibility Guidelines 1.0 -
- Copyright and legal notices -
Time to create this page: 7.8 ms