nohup: create nohup.out with mode 0600#12339
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POSIX nohup creates the output file with permissions that block other users from reading it. We were leaving the mode at the process umask default, so on a typical system with umask 022 the file would land at 0644 and any other local user could read whatever the detached job logged. That's not great on multi-user hosts. Pass `.mode(0o600)` on the OpenOptions so newly-created `nohup.out` files start out as owner-only. Existing files keep their current permissions, which matches GNU. Closes uutils#10021. Signed-off-by: Charlie Tonneslan <cst0520@gmail.com>
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Closes #10021.
POSIX nohup creates the output file as owner-only so other local users can't read what the detached job logs. We were leaving the mode at the process umask, so on a host with the typical umask of 022 the file would land at 0644 and anyone could read it.
Pass
.mode(0o600)on theOpenOptions. The mode only applies to newly-created files; ifnohup.outalready exists its permissions are left alone, which matches GNU.Verified locally: