systemctl: make list-unit-files output more economical
The first column is given the width of the widest entry,
if possible, otherwise all entries are ellipsized to fit
in ($COLUMNS - (width of second column)).
[ Added a few fixes, calculate state_cols too, respect '--no-legend',
better handling of '--full' -- michich ]
Dave Reisner [Wed, 12 Oct 2011 00:56:53 +0000 (20:56 -0400)]
systemctl-completion: always invoke with --no-legend
In the case of completion for the 'restart' verb, passing the invalid
unit name (the colums header) causes completion to cease functioning
entirely, with the error:
Failed to issue method call: Unit name UNIT is not valid.
This adds a small wrapper function for systemctl which can have common
options added to it.
Jonathan Nieder [Mon, 17 Oct 2011 19:01:40 +0000 (21:01 +0200)]
audit: do not complain if kernel lacks audit
When running on a kernel without audit support, systemd currently
writes a mysterious-sounding error to its log:
systemd[1]: Failed to connect to audit log: Protocol not supported
Better to suppress the audit_open() failure message when (and only
when) it is due to running on a kernel without audit support, since in
this case the admin probably does not mind systemd not writing to the
audit log. This way, more serious errors like ENOMEM and EACCES will
stand out more.
Tollef Fog Heen [Mon, 17 Oct 2011 19:00:42 +0000 (21:00 +0200)]
service: Drop rcN.d runlevels from SysV services that also exist in rcS.d
Services which claim to start in both rcN.d and rcS.d generate
loops which for some reason seems to usually end up with dbus not
starting and the whole machine being quite unhappy. We now rather
assume that if a service can be started in rcS, it should not also
start in rcN.d.
Michal Schmidt [Mon, 17 Oct 2011 09:12:12 +0000 (11:12 +0200)]
manager: fix a crash in isolating
HASHMAP_FOREACH is safe against the removal of the current entry, but
not against the removal of other entries. job_finish_and_invalidate()
can recursively remove other entries.
It triggered an assertion failure:
Assertion 'j->installed' failed at src/manager.c:1218, function
transaction_apply(). Aborting.
Fix the crash by iterating from the beginning when there is a
possibility that the iterator could be invalid.
It is O(n^2) in the worst case, but that's better than a crash.
service: don't try to guess PID for SysV services anymore
As it turns out there are quite a number of SysV services too broken to
make the guessing work: instead of returning in the parent only after
the child is fully initialized they return immediately. The effect is
that the guessing in systemd might happen too early, at a time where the
final main process doesn't exist yet.
By turning this off we won't try to detect the main pid anymore, with
the effect that all processes of the service in question are considered
equally likely to be the main process.
src/pager.c: In function ‘pager_fallback’:
src/pager.c:35:13: warning: function might be possible candidate for attribute ‘noreturn’ [-Wmissing-noreturn]
units: remount root and API FS before all mount units are applied
In order to ensure that bind mounts copy the final mount settings to the
new bind mount make the root and API FS mount options are applied before
the other file systems are mounted.
Michal Schmidt [Thu, 29 Sep 2011 19:18:17 +0000 (21:18 +0200)]
systemctl: fix corrupted output of units
On some systems the list of units in systemctl output came out wrong,
all on one line and with missing descriptions.
It turns out printf() really attempts to mmap 2G memory when INT_MAX is
passed as the field width. On machines with small virtual memory
without overcommit the mmap inside printf() failed.
KEYMAP are use to pass keymap configuration to initrd, but not to the
system itself. Since the initrd might get out of date we need to make
sure that changes made in userspace override the settings from the
cmdline, hence drpo any use of it all for these variables.
Michal Schmidt [Tue, 27 Sep 2011 09:20:20 +0000 (11:20 +0200)]
systemctl: better width and alignment of fields
Provide nicer output by taking advantage of the available columns.
Expand UNIT and DESCRIPTION if possible. Economize the space:
- never give UNIT more width than it can use.
- if there's a shortage of space, give 25 columns to UNIT, even
if it would result in overflowing the total columns. The field would not
be useful below width 25.
- then if possible, assign up to 25 columns to DESCRIPTION.
- then split any remaining space evenly between UNIT and DESCRIPTION.
Michal Schmidt [Mon, 26 Sep 2011 22:48:40 +0000 (00:48 +0200)]
systemctl: print the legend regardless of stdout type, add --no-legend
Print the legend (the column headers and the footer with hints) by
default even to non-tty output. People seem to get confused by the
difference when they redirect the output.
Add a parameter to suppress the printing of the legend.
Michal Schmidt [Fri, 23 Sep 2011 11:58:00 +0000 (13:58 +0200)]
unit: fix complementing of requirement deps with After deps for targets
'man systemd.target' says:
Unless DefaultDependencies= is set to false, target units will
implicitly complement all configured dependencies of type
Wants=, Requires=, RequiresOverridable= with dependencies of type
After= if the units in question also have DefaultDependencies=true.
Michal Schmidt [Fri, 23 Sep 2011 00:10:00 +0000 (02:10 +0200)]
condition: fix reversed tests if path does not exist at all
CONDITION_PATH_IS_DIRECTORY, CONDITION_PATH_IS_SYMBOLIC_LINK and
CONDITION_FILE_IS_EXECUTABLE gave reversed results when the path
did not exist at all.
Michal Schmidt [Thu, 22 Sep 2011 21:52:38 +0000 (23:52 +0200)]
units: fix rescue.service race with plymouth
It was possible for the "ExecStartPre=-/bin/plymouth quit" to race
with plymouth-start.service which is pulled in indirectly by
basic.target -> sysinit.target.
The race left plymouth running on the terminal, making it unusable for
rescue purposes.
Michal Schmidt [Thu, 22 Sep 2011 11:10:32 +0000 (13:10 +0200)]
service: warn if a service fails to write its PID file
Warn if a service promises to write a PID file (using 'PIDFile=' in the
unit file or '# pidfile:' in SysV header), but fails to keep the
promise.
This warning will likely trigger also for the forking services with a
racy daemonization, which exit the original process before the PID file
is written.
service: if StandardInput=socket and StandardOutput=inherit imply socket for output, don't imply default output
This is useful for inetd-style per-connection services, so that they
again can simply specify StandardOutput=socket to connect all three fds
to the socket.
The mount point directory /sys/kernel/config is only created after the
module is loaded, hence there's little value in having this an automount
unit: the runtime penalty for mounting an autofs here should be the same
as for a real mount.
Michal Schmidt [Tue, 20 Sep 2011 19:43:30 +0000 (21:43 +0200)]
service: handle forking services that move to a new PID
When some forking daemons receive a SIGHUP, they re-execute themselves
and consequently change to a new main PID. As long as they update the
PID file in the right order (before exiting the old PID), we can detect
that and avoid killing them.