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services: cleanup-service: Catch 'system-error' instead of everything.

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This makes sure that critical errors such as unbound-variable do not go
undetected.

* gnu/services.scm (cleanup-gexp): Introduce local 'fail-safe' macro and
use it.  Remove uses of 'false-if-exception'.
This commit is contained in:
Ludovic Courtès 2016-01-06 14:49:48 +01:00
parent 341ae58213
commit 3c4c8c3e06
1 changed files with 17 additions and 6 deletions
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23
gnu/services.scm
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@ -255,12 +255,23 @@ (define %modules
;; XXX This needs to happen before service activations, so it
;; has to be here, but this also implicitly assumes that /tmp
;; and /var/run are on the root partition.
(false-if-exception (delete-file-recursively "/tmp"))
(false-if-exception (delete-file-recursively "/var/run"))
(false-if-exception (mkdir "/tmp"))
(false-if-exception (chmod "/tmp" #o1777))
(false-if-exception (mkdir "/var/run"))
(false-if-exception (chmod "/var/run" #o755))))))
(letrec-syntax ((fail-safe (syntax-rules ()
((_ exp rest ...)
(begin
(catch 'system-error
(lambda () exp)
(const #f))
(fail-safe rest ...)))
((_)
#t))))
;; Ignore I/O errors so the system can boot.
(fail-safe
(delete-file-recursively "/tmp")
(delete-file-recursively "/var/run")
(mkdir "/tmp")
(chmod "/tmp" #o1777)
(mkdir "/var/run")
(chmod "/var/run" #o755)))))))
(define cleanup-service-type
;; Service that cleans things up in /tmp and similar.