Commit bd5dc17be87b3a3073d50b23802647db3ae3fa8e
Committed by
Linus Torvalds
1 parent
ca39599c63
Exists in
master
and in
20 other branches
uts: make default hostname configurable, rather than always using "(none)"
The "hostname" tool falls back to setting the hostname to "localhost" if /etc/hostname does not exist. Distribution init scripts have the same fallback. However, if userspace never calls sethostname, such as when booting with init=/bin/sh, or otherwise booting a minimal system without the usual init scripts, the default hostname of "(none)" remains, unhelpfully appearing in various places such as prompts ("root@(none):~#") and logs. Furthermore, "(none)" doesn't typically resolve to anything useful. Make the default hostname configurable. This removes the need for the standard fallback, provides a useful default for systems that never call sethostname, and makes minimal systems that much more useful with less configuration. Distributions could choose to use "localhost" here to avoid the fallback, while embedded systems may wish to use a specific target hostname. Signed-off-by: Josh Triplett <josh@joshtriplett.org> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: David Miller <davem@davemloft.net> Cc: Serge Hallyn <serue@us.ibm.com> Cc: Kel Modderman <kel@otaku42.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Showing 2 changed files with 10 additions and 1 deletions Side-by-side Diff
include/linux/uts.h
init/Kconfig
... | ... | @@ -204,6 +204,15 @@ |
204 | 204 | |
205 | 205 | endchoice |
206 | 206 | |
207 | +config DEFAULT_HOSTNAME | |
208 | + string "Default hostname" | |
209 | + default "(none)" | |
210 | + help | |
211 | + This option determines the default system hostname before userspace | |
212 | + calls sethostname(2). The kernel traditionally uses "(none)" here, | |
213 | + but you may wish to use a different default here to make a minimal | |
214 | + system more usable with less configuration. | |
215 | + | |
207 | 216 | config SWAP |
208 | 217 | bool "Support for paging of anonymous memory (swap)" |
209 | 218 | depends on MMU && BLOCK |