Revert r330897:

This was intended to be a non-functional change. It wasn't. The commit
message was thus wrong. In addition it broke arm, and merged crypto
related code.

Revert with prejudice.

This revert skips files touched in r316370 since that commit was since
MFCed. This revert also skips files that require $FreeBSD$ property
changes.

Thank you to those who helped me get out of this mess including but not
limited to gonzo, kevans, rgrimes.

Requested by: gjb (re)

Partial merge of the SPDX changes

These changes are incomplete but are making it difficult
to determine what other changes can/should be merged.

No objections from: pfg

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

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

Fix a regression that was introduced in r191882.

I changed login_tty() to only work when the application is not a session
leader yet. This works fine for applications in the base system, but it
turns out various applications call this function after daemonizing,
which means they already use their own session.

If setsid() fails, just call tcsetsid() on the current session.
tcsetsid() will already perform proper security checks.

Reported by: Oliver Lehmann
MFC after: 1 week

Add tcsetsid(3).

The entire world seems to use the non-standard TIOCSCTTY ioctl to make a
TTY a controlling terminal of a session. Even though tcsetsid(3) is also
non-standard, I think it's a lot better to use in our own source code,
mainly because it's similar to tcsetpgrp(), tcgetpgrp() and tcgetsid().

I stole the idea from QNX. They do it the other way around; their
TIOCSCTTY is just a wrapper around tcsetsid(). tcsetsid() then calls
into an IPC framework.

Remove California Regent's clause 3, per letter

ANSIfy, WARNSify, CONSTify. Bit of style(9)-ify.

Tidy up. Sort headers.

Add __FBSDID()s to libutil

$Id$ -> $FreeBSD$

Now take stdio.h out of files that don't require it.

All these have to include stdio.h now.

Protect the copyright comments from reformatting by
indent and make this compile -Wall clean like the
Makefile suggests that it should. :)

Pointed out by: Bruce Evans <bde@zeta.org.au>

Bump libutil revision after recent addition of setproctitle().

Install (optional) libutil.h with prototypes for the functions and
document this in the man page.

minor cleanups to the various routines, include the prototype file, declare
return codes etc.

This commit was generated by cvs2svn to compensate for changes in r1573,
which included commits to RCS files with non-trunk default branches.

BSD 4.4 Lite Lib Sources