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CHECK_UTILITY_COMPAT(3)	 BSD Library Functions Manual  CHECK_UTILITY_COMPAT(3)

NAME
     check_utility_compat -- determine whether a utility should	be compatible

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <unistd.h>

     int
     check_utility_compat(const	char *utility);

DESCRIPTION
     The check_utility_compat()	function checks	whether	utility	should behave
     in	a traditional (FreeBSD 4.7-compatible) manner, or in accordance	with
     IEEE Std 1003.1-2001 ("POSIX.1").	The configuration is given as a	comma-
     separated list of utility names; if the list is present but empty,	all
     supported utilities assume	their most compatible mode.  The
     check_utility_compat() function first checks for an environment variable
     named _COMPAT_FreeBSD_4.  If that environment variable does not exist,
     then check_utility_compat() will attempt to read the contents of a	sym-
     bolic link	named /etc/compat-FreeBSD-4-util.  If no configuration is
     found, compatibility mode is disabled.

RETURN VALUES
     The check_utility_compat()	function returns zero if utility should	imple-
     ment strict IEEE Std 1003.1-2001 ("POSIX.1") behavior, and	nonzero	other-
     wise.

ERRORS
     No	errors are detected.

FILES
     /etc/compat-FreeBSD-4-util	 If present, a symbolic	link whose expansion
				 gives system-wide default settings for	the
				 check_utility_compat()	function.

HISTORY
     The check_utility_compat()	function first appeared	in FreeBSD 5.0.

AUTHORS
     This manual page was written by Garrett Wollman <wollman@FreeBSD.org>.

BSD			       October 27, 2002				   BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | FILES | HISTORY | AUTHORS

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