While it has always been assumed that everyone "just knew" that a simple
"su' meant "su root" perhaps the man page really should make that explicit.
Do that (using slightly different wording than suggested in the PR).
Since 2021-01-31, lint no longer requires a CONSTCOND comment in a
do-while-0 statement since this is a common code pattern, especially in
statement-like macros.
- Fix a memory leak in newgrp(). (Noted by ginsbach@.)
- If the new and old groups are the same, addgrp() does nothing so
exit early. (Noted by ginsbach@.)
- In newgrp(), if the new group isn't found in the in-core, check the
group membership list anyway as the in-core list may be full or
/etc/groups may have been edited since login. (Requested by
ginsbach@.)
- Deal with a full in-core group[] array in addgid() rather than
silently ignoring it and ending up with a group[] array that is
inconsistent with the current group.
- More explicit error handling in addgroup().
- general cleanup [e-funcs, lint fixes, exit values, more error checking]
- add the ability to change the primary group group as login:group, or :group
*disabled*, until it is discussed.
- remove krb4 code since there is no more krb4 code in the tree.
- also make the old su behave like the pam su: su to the same user, does
not ask for a password.
- split out shared code into a separate file.
FORTIFY_SOURCE feature of libssp, thus checking the size of arguments to
various string and memory copy and set functions (as well as a few system
calls and other miscellany) where known at function entry. RedHat has
evidently built all "core system packages" with this option for some time.
This option should be used at the top of Makefiles (or Makefile.inc where
this is used for subdirectories) but after any setting of LIB.
This is only useful for userland code, and cannot be used in libc or in
any code which includes the libc internals, because it overrides certain
libc functions with macros. Some effort has been made to make USE_FORT=yes
work correctly for a full-system build by having the bsd.sys.mk logic
disable the feature where it should not be used (libc, libssp iteself,
the kernel) but no attempt has been made to build the entire system with
USE_FORT and doing so will doubtless expose numerous bugs and misfeatures.
Adjust the system build so that all programs and libraries that are setuid,
directly handle network data (including serial comm data), perform
authentication, or appear likely to have (or have a history of having)
data-driven bugs (e.g. file(1)) are built with USE_FORT=yes by default,
with the exception of libc, which cannot use USE_FORT and thus uses
only USE_SSP by default. Tested on i386 with no ill results; USE_FORT=no
per-directory or in a system build will disable if desired.
XXX: needs more work.
1. code needs to be added in pam_group.so to handle indirect groups and
documented.
2. the indirect group description outside before the customization section
does not work with pam, but could be made to work once [1] is implemented.
with MKPIC=no, possibly because the target does not support shared
libraries, these include libraries required to resolve all symbols
which end up referenced from PAM-using applications. The libraries
presently required are -lcrypt, -lrpcsvc and -lutil.
Add use of these variables which are currently set up to use PAM,
so that they compile when MKPIC=no.
Also, in the telnetd case, reorder the order of the libraries, so
that libtelnet.a comes before -ltermcap and -lutil, again to fix
link error when MKPIC=no.
Discussed with thorpej and christos.
kre