pyrox.dev
Merge pull request #16755 from bjornfor/swapfile-resize
nixos/swap: support for resizing swapfile
authored by
Eelco Dolstra
and committed by
GitHub
0d5be595
851cd1e6
+6
-3
nixos/modules/config/swap.nix
+6
-3
nixos/modules/config/swap.nix
···
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description = ''
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If this option is set, ‘device’ is interpreted as the
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path of a swapfile that will be created automatically
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-
with the indicated size (in megabytes) if it doesn't
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-
exist.
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'';
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};
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···
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script =
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''
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${optionalString (sw.size != null) ''
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-
if [ ! -e "${sw.device}" ]; then
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fallocate -l ${toString sw.size}M "${sw.device}" ||
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dd if=/dev/zero of="${sw.device}" bs=1M count=${toString sw.size}
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chmod 0600 ${sw.device}
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${optionalString (!sw.randomEncryption) "mkswap ${sw.realDevice}"}
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fi
···
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description = ''
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If this option is set, ‘device’ is interpreted as the
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path of a swapfile that will be created automatically
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+
with the indicated size (in megabytes).
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'';
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};
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···
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script =
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''
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${optionalString (sw.size != null) ''
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+
currentSize=$(( $(stat -c "%s" "${sw.device}" 2>/dev/null || echo 0) / 1024 / 1024 ))
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if [ "${toString sw.size}" != "$currentSize" ]; then
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fallocate -l ${toString sw.size}M "${sw.device}" ||
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dd if=/dev/zero of="${sw.device}" bs=1M count=${toString sw.size}
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if [ "${toString sw.size}" -lt "$currentSize" ]; then
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truncate --size "${toString sw.size}M" "${sw.device}"
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fi
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chmod 0600 ${sw.device}
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${optionalString (!sw.randomEncryption) "mkswap ${sw.realDevice}"}
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fi