Several of the /etc/issue escape codes such as \4 and \6 depend on
the current addresses of the system that can change after the agetty
prompt is displayed. This can cause stale data to be displayed
when a user looks at a VT, especially in cases of DHCP racing with
system start up.
Similar to the --reload mechanism, if we're displaying an address
in the issue output, and the user hasn't typed anything yet: then
redisplay the prompt with the new address.
We use netlink to watch for address changes. We only open the netlink
socket if we display an address in the issue file.
[kzak@redhat.com: - be careful with errno and DBG
- add EINTR check
(both suggested by Rudi]
Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>
Signed-off-by: Karel Zak <kzak@redhat.com>
Most distributions probably ship reset from ncurses, which means
util-linux reset(1) is unlikely to be in use anywhere. Assuming the
previous being true it is almost unimaginable anyone one would be using
the alternative script, so remove it and mark the script deprecated.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
* remove STDIN from poll() if:
* STDIN already closed -- poll returns POLLHUP, for example:
echo "date" | script
* detect EOF as returned by read(), for example:
script -c "echo Hello" < /dev/null
* don't write to master when there is still something to read from
slave (it means shell is not initialized yet or busy)
Signed-off-by: Karel Zak <kzak@redhat.com>
* don't call anything from assert()
* fork() block cleanup to make it more readable
* restore original signal mask in child (do_shell())
* close signal FD in child (do_shell())
Signed-off-by: Karel Zak <kzak@redhat.com>
Sorry, but it's really ugly manner to use "xflg" where "x" is a command
line option as program variable and use it in code.
Signed-off-by: Karel Zak <kzak@redhat.com>
This allows removing almost immediate closure of file handle in the
doshell() function that does not use the file.
Proposed-by: Karel Zak <kzak@redhat.com>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
This moves the previous time to script control structure, and does
timeval calculation with timersub() that is more appropriate than
making a timeval to a double.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Nowadays, gcc(1) provides the -Wno-format-y2k option to prevent the
warning, so that the above workaround is no longer required.
Reference: http://man7.org/linux/man-pages/man3/strftime.3.html
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
The scriptreplay(1) will expect capture file always to have header.
Before this change the --quiet option together with timing caused
following replay error.
$ script --quiet --timing=timing
[...]
$ scriptreplay timing typescript
[...]
scriptreplay: unexpected end of file on typescript
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
One item to poll() more is a lot less work for system than separete input
and output processes.
Addresses: https://github.com/karelzak/util-linux/pull/62
CC: Wolfgang Richter <wolf@cs.cmu.edu>
CC: Ruediger Meier <ruediger.meier@ga-group.nl>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Finalize the signalfd() change by adding file descriptors to poll() loop.
Addresses: https://github.com/karelzak/util-linux/pull/62
CC: Wolfgang Richter <wolf@cs.cmu.edu>
CC: Ruediger Meier <ruediger.meier@ga-group.nl>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
This is incomplete change. Working command requires the subsequent
select() to poll() change as well.
Addresses: https://github.com/karelzak/util-linux/pull/62
CC: Wolfgang Richter <wolf@cs.cmu.edu>
CC: Ruediger Meier <ruediger.meier@ga-group.nl>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
On s390 and other big endian machines, doinput() sends NUL instead of
EOF to the tty master. NUL does not even reach the slave, and it is
waiting for more data forever.
If STDIN is not a tty, the bug caused "^@" being into the log, and since
commit 032228c it also causes hang.
Signed-off-by: Stanislav Brabec <sbrabec@suse.cz>
The issue with using a temporary file in wall is that wall runs as setgid.
This means that an unprivileged user who runs wall can modify wall's
temporary files, even if those are mode 0600, so the unprivileged user can
edit and effectively suppress the banner. The fix is to simply not use
temporary files.
[kzak@redhat.com: - rewrite growing string functions
- use struct buffer
- add buf_print() function]
Signed-off-by: Karel Zak <kzak@redhat.com>
Co-Author: Jann Horn <jann@thejh.net>
The current "agetty --reload" implementation does not refresh issue
file output on autologin. Let's support this use-case too.
Reported-by: Sitsofe Wheeler <sitsofe@gmail.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
agetty monitors /run/agetty.reload file, unfortunately if the file
does not exist when agetty starts up then "agetty" --reload does not
work. This patch forces agetty to create the file before inotify
is enabled.
Reported-by: Sitsofe Wheeler <sitsofe@gmail.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
http://www.freedesktop.org/software/systemd/man/os-release.html
The file /etc/os-release takes precedence over /usr/lib/os-release.
Applications should check for the former, and exclusively use its data
if it exists, and only fall back to /usr/lib/os-release if it is
missing.
Reported-by: Dimitri John Ledkov <dimitri.j.ledkov@intel.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
- use exit in .profile to avoid non-logged session after typing "exit"
- document that script can read more from stdin than the command inside:
echo -e 'script -c "read a b ; echo a=\$a b=\$b >defs.sh"\n1 2\necho Done' | sh
Script started, file is typescript
1 2
echo Done
Script done, file is typescript
Karel Zak wrote:
> Would be better to learn people to fix their shell initialization
> files to not call script(1) for non-interactive sessions?
It makes sense.
From 8fff32e65399ae07f70e12568d4d5278725673a7 Mon Sep 17 00:00:00 2001
From: Stanislav Brabec <sbrabec@suse.cz>
Date: Wed, 11 Feb 2015 15:02:10 +0100
Subject: [PATCH] script.1: Document behavior in non-interactive shells
And discourage users from such use.
The message "stat failed %s" seems to say that stat() failed to
do something, or failed to pass a test, but of course it means
that the statting of something failed. So say so. Also make
two very similar messages equal to this one.
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
Transform some of them into copyright lines.
Also fix three header lines and snip some trailing whitespace.
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>
Karel Zak
Stef Walter
Ruediger Meier
Sami Kerola
Stanislav Brabec
Bill Pemberton
Benno Schulenberg
J William Piggott