emo/busybox
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

cttyhack: document the need to setsid

Browse Source 
function                                             old     new   delta
packed_usage                                       26988   27057     +69

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2010-05-15 20:43:07 +02:00
parent c84c85ae34
commit b367bb2a62
2 changed files with 23 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
shell/Config.in
View File

@ -354,9 +354,20 @@ config CTTYHACK
It analyzes stdin with various ioctls, trying to determine whether
it is a /dev/ttyN or /dev/ttySN (virtual terminal or serial line).
If it detects one, it closes stdin/out/err and reopens that device.
Then it executes given program. Usage example for /etc/inittab
(for busybox init):
Then it executes given program. Opening the device will make
that device a controlling tty. This may require cttyhack
to be a session leader.
Example for /etc/inittab (for busybox init):
::respawn:/bin/cttyhack /bin/sh
Giving controlling tty to shell running with PID 1:
$ exec cttyhack sh
Starting an interative shell from boot shell script:
setsid cttyhack sh
endmenu