linux-boot: Don't fail if /root/etc/mtab is a dangling symlink.
Reported Joshua Grant. Patch suggested by Mark H Weaver. * gnu/build/linux-boot.scm (mount-root-file-system): Use 'false-if-exception' instead of 'when (file-exists? ...)' to account for dangling symlinks.
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@ -1,5 +1,5 @@
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;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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@ -276,7 +276,7 @@ UNIONFS."
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(mount root "/root" type)))
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;; Make sure /root/etc/mtab is a symlink to /proc/self/mounts.
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(when (file-exists? "/root/etc/mtab")
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(false-if-exception
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(delete-file "/root/etc/mtab"))
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(symlink "/proc/self/mounts" "/root/etc/mtab"))
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