On 09/14/2012 04:41 AM, Matthew Dillon wrote:
I can't think of a good reason why f_listdot is set for root
automatically,
It goes all the way back to the original import in 2003 when we forked
from FreeBSD.
FreeBSD still turns it on automatically but added a -I option that
turns it off.
/* Root is -A automatically unless -I. */
if (!f_listdot && getuid() == (uid_t)0 && !f_noautodot)
f_listdot = 1;
"-I" option has a different explication in the GNU ls:
-I, --ignore=PATTERN
do not list implied entries matching shell PATTERN
So this is one more incompatibility.
At the very least I will bring in this change. But it may well be
that we should also change the default to NOT be -A for root.
Yes, it is one true solution.
There is one more solution which I have seen in Solaris. Many commands
are environment-sensitive.
For example, we can have the CMD_BEHAVIOR environment variable, which
can have values "POSIX" (or "POSIX:1812.321"), "BSD", "LINUX",
"SOLARIS", ...
So we can use these conditions:
if $CMD_BEHAVIOR is unset or $CMD_BEHAVIOR == "" then CMD_BEHAVIOR=POSIX
if $CMD_BEHAVIOR == POSIX then f_listdot = 0
if $CMD_BEHAVIOR == BSD and UID == 0 then f_listdot = 1
In this case I can change a command behavior in my shell scripts, and my
scripts can be OS-independent.
