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Full Discussion: Doubt regarding "init q"
Top Forums UNIX for Dummies Questions & Answers Doubt regarding "init q" Post 37399 by RTM on Wednesday 18th of June 2003 09:30:09 AM
Old 06-18-2003
First off, you don't need to do step 1, 2, or 4. All you have to do is replace the old executable with the new, possibly add a sleep to allow any write cache to clear, and do the init q command.

When making changes like this, the init process isn't re-reading/reloading anything until you do the init q. So you could replace any executable that is run by init and it will not update until the init q (or a reboot).

I don't believe the file timestamp is checked since you are running the init q command.

From the man page for init:

New entries can be added to /etc/inittab at any time; how-
ever, init still waits for one of the above three conditions
to occur before re-examining /etc/inittab. To get around
this, init Q or init q command wakes init to re-examine
/etc/inittab immediately.
 

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runit-init(8)						      System Manager's Manual						     runit-init(8)

NAME
init - a UNIX process no 1 SYNOPSIS
init [ 0 | 6 ] DESCRIPTION
runit-init is the first process the kernel starts. If runit-init is started as process no 1, it runs and replaces itself with runit(8). If runit-init is started while the system is up, it must be either called as init 0 or init 6: init 0 tells the Unix process no 1 to shutdown and halt the system. To signal runit(8) the system halt request, runit-init removes all permissions of the file /etc/runit/reboot (chmod 0), and sets the execute by owner permission of the file /etc/runit/stopit (chmod 100). Then a CONT signal is sent to runit(8). init 6 tells the Unix process no 1 to shutdown and reboot the system. To signal runit(8) the system reboot request, runit-init sets the execute by owner permission of the files /etc/runit/reboot and /etc/runit/stopit (chmod 100). Then a CONT signal is sent to runit(8). EXIT CODES
runit-init returns 111 on error, 0 in all other cases. SEE ALSO
runit(8), runsvdir(8), runsvchdir(8), sv(8), runsv(8), chpst(8), utmpset(8), svlogd(8) http://smarden.org/runit/ AUTHOR
Gerrit Pape <pape@smarden.org> runit-init(8)
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