FreeBSD Man Pages

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 oth-
     erwise.

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>.

FreeBSD 5.4		       October 27, 2002 		   FreeBSD 5.4

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