services: nscd: Provide an 'activate' script to make /var/run/nscd.

* gnu/services/base.scm (nscd-service): Add 'activate' field.
* guix/build/install.scm (directives): Remove /var/run/nscd; add
  /var/run.
* doc/guix.texi (Defining Services): Add 'activate' field in example.
  Document it.
This commit is contained in:
Ludovic Courtès 2014-05-24 18:09:11 +02:00
parent 55ccc388b7
commit 4b2615e1ca
3 changed files with 19 additions and 7 deletions

View file

@ -3299,6 +3299,9 @@ like:
(return (service
(documentation "Run libc's name service cache daemon.")
(provision '(nscd))
(activate #~(begin
(use-modules (guix build utils))
(mkdir-p "/var/run/nscd")))
(start #~(make-forkexec-constructor
(string-append #$glibc "/sbin/nscd")
"-f" "/dev/null" "--foreground"))
@ -3307,12 +3310,16 @@ like:
@end lisp
@noindent
The @code{start} and @code{stop} fields are G-expressions
(@pxref{G-Expressions}). They refer to dmd's facilities to start and
stop processes (@pxref{Service De- and Constructors,,, dmd, GNU dmd
Manual}). The @code{provision} field specifies the name under which
this service is known to dmd, and @code{documentation} specifies on-line
documentation. Thus, the commands @command{deco start ncsd},
The @code{activate}, @code{start}, and @code{stop} fields are G-expressions
(@pxref{G-Expressions}). The @code{activate} field contains a script to
run at ``activation'' time; it makes sure that the @file{/var/run/nscd}
directory exists before @command{nscd} is started.
The @code{start} and @code{stop} fields refer to dmd's facilities to
start and stop processes (@pxref{Service De- and Constructors,,, dmd,
GNU dmd Manual}). The @code{provision} field specifies the name under
which this service is known to dmd, and @code{documentation} specifies
on-line documentation. Thus, the commands @command{deco start ncsd},
@command{deco stop nscd}, and @command{deco doc nscd} will do what you
would expect (@pxref{Invoking deco,,, dmd, GNU dmd Manual}).

View file

@ -225,6 +225,11 @@ (define* (nscd-service #:key (glibc glibc-final))
(documentation "Run libc's name service cache daemon (nscd).")
(provision '(nscd))
(requirement '(user-processes))
(activate #~(begin
(use-modules (guix build utils))
(mkdir-p "/var/run/nscd")))
(start
#~(make-forkexec-constructor (string-append #$glibc "/sbin/nscd")
"-f" "/dev/null"

View file

@ -76,9 +76,9 @@ (define (directives store)
`((directory ,store 0 0)
(directory "/etc")
(directory "/var/log") ; for dmd
(directory "/var/run/nscd")
(directory "/var/guix/gcroots")
(directory "/var/empty") ; for no-login accounts
(directory "/var/run")
(directory "/run")
("/var/guix/gcroots/booted-system" -> "/run/booted-system")
("/var/guix/gcroots/current-system" -> "/run/current-system")