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linux-container: Correct test for unprivileged user namespace support.

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Fixes <https://bugs.gnu.org/31977>.
Reported by Paul Garlick <pgarlick@tourbillion-technology.com>.

* gnu/build/linux-container.scm (unprivileged-user-namespace-supported?):
Return #f when the 'userns-file' does not exist.
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Paul Garlick 2020-12-03 16:00:18 +00:00
parent 0d5d1bdf91
commit 8bc5ca5160
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gnu/build/linux-container.scm
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@ -44,7 +44,7 @@ (define (unprivileged-user-namespace-supported?)
(let ((userns-file "/proc/sys/kernel/unprivileged_userns_clone"))
(if (file-exists? userns-file)
(eqv? #\1 (call-with-input-file userns-file read-char))
#t)))
#f)))
(define (setgroups-supported?)
"Return #t if the setgroups proc file, introduced in Linux-libre 3.19,