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authored <ed@FreeBSD.org>2012-03-14 16:22:09 +0000
committered <ed@FreeBSD.org>2012-03-14 16:22:09 +0000
commit1204585265bed911e1a2b478cfc9393e528cc941 (patch)
treedea6cb77cabd12edd47299949ca72888b2ddeae7 /sbin/init/init.8
parenta6abf8bf85afb844a1c9fe80fb6579823cbf9259 (diff)
downloadFreeBSD-src-1204585265bed911e1a2b478cfc9393e528cc941.zip
FreeBSD-src-1204585265bed911e1a2b478cfc9393e528cc941.tar.gz
Make init(8) slightly more robust when /dev/console is missing.
If the environment doesn't offer a working /dev/console, the existing version of init(8) will simply refuse running rc(8) scripts. This means you'll only have a system running init(8) and nothing else. Change the code to do the following: - Open /dev/console like we used to do, but make it more robust to use O_NONBLOCK to prevent blocking on a carrier. - If this fails, use /dev/null as stdin and /var/log/init.log as stdout and stderr. - If even this fails, use /dev/null as stdin, stdout and stderr. So why us this useful? Well, if you remove the `getpid() == 1' check in main(), you can now use init(8) inside jails to properly execute rc(8). It still requires some polishing, as existing tools assume init(8) has PID 1. Also it is now possible to use use init(8) on `headless' devices that don't even have a serial boot console.
Diffstat (limited to 'sbin/init/init.8')
-rw-r--r--sbin/init/init.812
1 files changed, 6 insertions, 6 deletions
diff --git a/sbin/init/init.8 b/sbin/init/init.8
index 1d7bc2e..fa9f7f0 100644
--- a/sbin/init/init.8
+++ b/sbin/init/init.8
@@ -31,7 +31,7 @@
.\" @(#)init.8 8.3 (Berkeley) 4/18/94
.\" $FreeBSD$
.\"
-.Dd February 11, 2012
+.Dd March 14, 2012
.Dt INIT 8
.Os
.Sh NAME
@@ -293,22 +293,22 @@ as follows:
file
.El
.Sh FILES
-.Bl -tag -width /etc/rc.shutdown -compact
+.Bl -tag -width /var/log/init.log -compact
.It Pa /dev/console
system console device
.It Pa /dev/tty*
terminal ports found in
.Xr ttys 5
-.It Pa /var/run/utx.active
-record of current users on the system
-.It Pa /var/log/utx.log
-record of all logins and logouts
.It Pa /etc/ttys
the terminal initialization information file
.It Pa /etc/rc
system startup commands
.It Pa /etc/rc.shutdown
system shutdown commands
+.It Pa /var/log/init.log
+log of
+.Xr rc 8
+output if the system console device is not available
.El
.Sh DIAGNOSTICS
.Bl -diag
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