Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Add 'static' where able.

Put some static keywords in the source code.

For these simple utilities, it doesn't harm to make all global variables
static. In fact, this allows the compiler to perform better forms of
optimisation and analysis.

bin: Prefer strrchr() to rindex().

This removes the last index/rindex usage from /bin.

ln: Allow a trailing slash when creating a link to a directory.

In the 'ln source... directory' synopsis, the basename of each source
determines the name of the created link. Determine this using basename(3)
instead of strrchr(..., '/') which is incorrect if the pathname ends in a
slash.

The patch is somewhat changed to allow for basename(3) implementations that
change the passed pathname, and to fix the -w option's checking also.
The code to compare directory entries only applies to hard links, which
cannot be created to directories using ln.

Example:
ln -s /etc/defaults/ /tmp
This should create a symlink named defaults.

PR: 121568
Submitted by: Ighighi
MFC after: 1 week

ln: Refuse deleting a directory entry by hardlinking it to itself.

Two pathnames refer to the same directory entry iff the directories match
and the final components' names match.

Example: (assuming file1 is an existing file)
ln -f file1 file1
This now fails while leaving file1 intact. It used to delete file1 and then
complain it cannot be linked because it is gone.

With -i, this error is detected before the question is asked.

MFC after: 2 weeks

Allow creating hard links to symlinks using ln(1).

This implements the POSIX.1-2008 -L and -P flags.

The default remains to create hard links to the target of symlinks.

Approved by: re (kib), ed (mentor)

Unbreak last commit to ln for amd64.

Cast string precision to `int'. amd64 systems warn about the
field precision being `long int' if we don't, and pathnames are
normally short enough to fit in an `int'.

Noticed by: pav

Add a -w warning flag to ln(1). When the -w option is enabled,
ln(1) checks to see if the source of a symlink, i.e. the file it
should point to actually exists. The default is the old ln
behavior, that does not check, to avoid surprising people who may
be using ln(1) in scripts or other non-interactive places.

PR: bin/7265
Submitted by: Joel Ray Holveck, detlev!joelh at mail.camalott.com
MFC after: 2 weeks

Express in the usage() and SYNOPSIS that -F depends on -s, and
that -f and -i are exclusive.

Swap "source"/"target" where appropriate, to match documentation.

Add '-F' option which allows to delete existing empty directories, when
creating symbolic links.

PR: bin/92149
Submitted by: Eugene Grosbein <eugen grosbein.pp.ru>

Sync program's usage() with manpage's SYNOPSIS.

/*- or .\"- or #- to begin license clauses.

Remove clause 3 from the UCB licenses.

OK'ed by: imp, core

Quiet warnings about copyright[].

Fix an easy WARNS.

Consistently use __FBSDID

Check that snprintf() does not truncate the destination pathname when
linking into a directory.

Reject options, handle "--" end-of-options marker in link(1).

Add semicolon to empty default case to silence warning.

Fix warnings inspired by lint, a commercial lint and WARNS=4.

o __P has been reoved
o Old-style K&R declarations have been converted to new C89 style
o register has been removed
o prototype for main() has been removed (gcc3 makes it an error)
o int main(int argc, char *argv[]) is the preferred main definition.
o Attempt to not break style(9) conformance for declarations more than
they already are.

Use PATH_MAX in preference to MAXPATHLEN.

Also sort declarations per style(9) (big arrays come last) while I'm
in the area.

Silence WARNS=2 and BDECFLAGS on i386 and alpha

MFC After: 1 week

Previous commit should read:

style(9) Reviewed by: bde

Bring in `-h' compatability option and its alias `-n' to match NetBSD and GNU
semantics.

style(9) Reviewed by:
Obtained from: NetBSD

Fix style bugs and inconsistencies introduced in rev 1.16.

Submitted by: bde

Don't explicitly declare optarg and optind. These are declared in
unistd.h, which is already included.

Add the -i option, as found in rm(1), which provides an interactive
mode in which the user is prompted for confirmation before an
existing file is replaced.

Submitted by: alex

Add link(1) and unlink(1) as special cases of ln(1) and rm(1)
respectively, in accordance with SUSv2.

This differs from the approach taken in NetBSD, but provides
less obscure error messages in at least the EISDIR case and
does not take up additional disk space for new binaries.

PR: 13071
PR: 13074
Requested by: James Howard <howardjp@wam.umd.edu>

Add verbose processing flag.

$Id$ -> $FreeBSD$

Correct use of .Nm. Add rcsid.

Cosmetic change in usage string.

compare return value from getopt against -1 rather than EOF, per the final
posix standard on the topic.

Revert $FreeBSD$ to $Id$

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

-Wall cleaning.

Nuke the undocumented -F flag, since it doesn't do anything anymore.

It used to allow root to hard-link directories (and screw up programs that
expexted the ".." entry to point to the parent dir)

Use lstat() instead of stat() for checking if the final source file exists,
so that `ln -fs' works when the source is a symlink pointing to a non-
existent file.

Added $Id$

fix ln to accept -f again. Thanks Bruce. Seems that Joe Grosch isn't
quite as safe as I thought. I will have to look much closer on his
patches. Damn.

/home/phk/jg

This commit was generated by cvs2svn to compensate for changes in r1556,
which included commits to RCS files with non-trunk default branches.

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