NAME
check_utility_compat —
determine whether a utility should be
compatible
LIBRARY
library “libc”
SYNOPSIS
#include
<unistd.h>
int
check_utility_compat(const
char *utility);
DESCRIPTION
Thecheck_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 symbolic 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 implement strict
IEEE Std 1003.1-2001 (“POSIX.1”)
behavior, and nonzero otherwise.
FILES
- /etc/compat-FreeBSD-4-util
- If present, a symbolic link whose expansion gives system-wide default
settings for the
check_utility_compat() function.
ERRORS
No errors are detected.
HISTORY
The check_utility_compat() function first
appeared in FreeBSD 5.0.
AUTHORS
This manual page was written by Garrett Wollman <wollman@FreeBSD.org>.