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docker: Add support for setting umask (#9429)

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Add support for setting umask value in the Docker `entrypoint.sh`
script. This is useful when
not syncing permissions and working with groups, and needing umask
values like `002` instead of `022`.
This commit is contained in:
Beat Reichenbach 2024-02-22 00:47:43 -08:00 committed by GitHub
parent f4d160684b
commit c4dfb66d84
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2 changed files with 6 additions and 1 deletions
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3
README-Docker.md
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@ -15,6 +15,9 @@ To grant Syncthing additional capabilities without running as root, use the
`PCAP` environment variable with the same syntax as that for `setcap(8)`.
For example, `PCAP=cap_chown,cap_fowner+ep`.
To set a different umask value, use the `UMASK` environment variable. For
example `UMASK=002`.
## Example Usage
**Docker cli**

4
script/docker-entrypoint.sh
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@ -2,9 +2,11 @@
set -eu
[ -n "${UMASK:-}" ] && umask "$UMASK"
if [ "$(id -u)" = '0' ]; then
binary="$1"
if [ "${PCAP:-}" == "" ] ; then
if [ -z "${PCAP:-}" ]; then
# If Syncthing should have no extra capabilities, make sure to remove them
# from the binary. This will fail with an error if there are no
# capabilities to remove, hence the || true etc.