Commit Graph

9 Commits

Author SHA1 Message Date
Serge Hallyn
2b22a6909d libsubid: don't print error messages on stderr by default
Closes #325

Add a new subid_init() function which can be used to specify the
stream on which error messages should be printed.  (If you want to
get fancy you can redirect that to memory :)  If subid_init() is
not called, use stderr.  If NULL is passed, then /dev/null will
be used.

This patch also fixes up the 'Prog', which previously had to be
defined by any program linking against libsubid.  Now, by default
in libsubid it will show (subid).  Once subid_init() is called,
it will use the first variable passed to subid_init().

Signed-off-by: Serge Hallyn <serge@hallyn.com>
2021-05-15 12:38:55 -05:00
Tomas Mraz
fd4405b763 Do not mistake a regular user process for a namespaced one
In case there is a regular user with a process running on a system
with uid falling into a namespaced uid range of another user.
The user with the colliding namespaced uid range will not be
allowed to be deleted without forcing the action with -f.

The user_busy() is adjusted to check whether the suspected process
is really a namespaced process in a different namespace.
2020-01-21 09:16:10 +01:00
Serge Hallyn
6eae751e70 user_busy: fix missing close of subuid file on error
Closes #69

Reported-by: plenkow
Signed-off-by: Serge Hallyn <serge@hallyn.com>
2017-03-23 17:07:46 -05:00
Bastian Blank
d2fa8c5d4b Fix user busy errors at userdel
From: Bastian Blank <bastian.blank@credativ.de>
Acked-by: Serge Hallyn <serge.hallyn@ubuntu.com>
2015-11-17 10:53:55 -06:00
Nicolas François
d611d54ed4 Allow disabling of subordinate IDs.
* configure.in: Add configure options --enable-subordinate-ids /
	--disable-subordinate-ids. Enabled by default.
	* lib/prototypes.h: Include <config.h> before using its macros.
	* lib/commonio.h, lib/commonio.c: Define commonio_append only when
	ENABLE_SUBIDS is defined.
	* lib/prototypes.h, libmisc/find_new_sub_gids.c,
	libmisc/find_new_sub_uids.c: Likewise.
	* lib/subordinateio.h, lib/subordinateio.c: Likewise.
	* libmisc/user_busy.c: Only check if subordinate IDs are in use if
	ENABLE_SUBIDS is defined.
	* src/Makefile.am: Create newgidmap and newuidmap only if
	ENABLE_SUBIDS is defined.
	* src/newusers.c: Check for ENABLE_SUBIDS to enable support for
	subordinate IDs.
	* src/useradd.c: Likewise.
	* src/userdel.c: Likewise.
	* src/usermod.c: Likewise.
	* man/Makefile.am: Install man1/newgidmap.1, man1/newuidmap.1,
	man5/subgid.5, and man5/subuid.5 only if ENABLE_SUBIDS is defined.
	* man/fr/Makefile.am: Install man1/newgidmap.1, man1/newuidmap.1,
	man5/subgid.5, and man5/subuid.5 (not translated yet).
	* man/generate_mans.mak: Add xsltproc conditionals
	subids/no_subids.
	* man/login.defs.d/SUB_GID_COUNT.xml: Add dependency on subids
	condition.
	* man/login.defs.d/SUB_UID_COUNT.xml: Likewise.
	* man/usermod.8.xml: Document options for subordinate IDs and
	reference subgid(5) / subuid(5) depending on the subids condition.
2013-08-11 15:46:59 +02:00
Eric W. Biederman
89f7b0868c Add support for detecting busy subordinate user ids
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2013-08-05 10:08:45 -05:00
nekral-guest
d7fa77f03b * lib/groupio.c, lib/sgroupio.c, lib/shadowio.c, lib/pwio.c: Check
entry validity before commits to databases.
	* libmisc/fields.c, libmisc/Makefile.am, lib/fields.c,
	lib/Makefile.am, po/POTFILES.in: fields.c moved from libmisc to
	lib.
2011-02-16 20:32:16 +00:00
nekral-guest
c859ad91c4 Added missing return value. 2009-05-18 22:46:13 +00:00
nekral-guest
4a4549c49b * src/userdel.c, libmisc/user_busy.c, libmisc/Makefile.am,
lib/prototypes.h: Move user_busy() to libmisc/user_busy.c.
	* NEWS, libmisc/user_busy.c: On Linux, do not check if an user is
	logged in with utmp, but check if the user is running some
	processes. If not on Linux, continue to search for an utmp record,
	but make sure the process recorded in the utmp entry is still
	running.
2009-05-18 18:32:17 +00:00