Signed-off-by: Kathryn Baldauf <[email protected]>

Instead of copy/pasting the code to check individual mountedBy*
implementations, add a list and a loop to check them.

The only special thing is, we have to check if the name of the function
being tested is "mountedByStat", to skip erroring out on bind mounts.
Otherwise the code is the same.

Signed-off-by: Kir Kolyshkin <[email protected]>

Since commit 7a52162 Mount is not implemented on Darwin, so
mount() is left unused.

Also, mount errors are only used from mount(), and thus are not used on
Darwin.

This fixes a bunch of warnings from "unused" and "deadcode" lints.

Signed-off-by: Kir Kolyshkin <[email protected]>

mount: fix unused/deadcode warnings on Mac

Add lcow supported signals to windows signal map

Fixes: dbd468b
Signed-off-by: Kir Kolyshkin <[email protected]>

MountedFast is a method of detecting a mount point without reading
mountinfo from procfs. A caller can only trust the result if no error
and sure == true are returned. Otherwise, other methods (e.g. parsing
/proc/mounts) have to be used. If unsure, use Mounted instead (which
uses MountedFast, but falls back to parsing mountinfo if needed).

If a non-existent path is specified, an appropriate error (rather than
"not mounted") is returned. In case the caller is not interested in this
particular error, it should be handled separately using e.g.
errors.Is(err, os.ErrNotExist).

This function is only available on Linux. The implementation mostly
relies on openat2(2) syscall, available since Linux kernel v5.6.
On older kernels, this uses stat(2) syscall which can reliably
detect normal (but not bind) mounts.

Signed-off-by: Kir Kolyshkin <[email protected]>

1. Do not compare booleans to false and true.

2. Since there are only two values, no sense in printing the actual value.

Signed-off-by: Kir Kolyshkin <[email protected]>

For clarity.

Signed-off-by: Kir Kolyshkin <[email protected]>

Signed-off-by: Kir Kolyshkin <[email protected]>

Test both MountedFast and Mounted.

Signed-off-by: Kir Kolyshkin <[email protected]>

mountinfo: add MountedFast

Signed-off-by: Kir Kolyshkin <[email protected]>

mount: bump mountinfo to v0.6.0

Apparently GHA CI Mac OS X environment uses old GNU Make (v3.81) which
does not yes support .SHELLFLAGS (added by commit 8589e2e).

Since we call a few commands (under "for") from the make target,
intermediate failures are ignored unless "-e" shell option is set
(or explicit "&&" is used, which is not possible to do in "for").

Example:

	for cmd in false true; do $cmd; done

This code succeeds (has exit code of 0), unless "set -e" is set, because
the last command executed is "true" with the exit code of 0.

Use explicit "set -e" where needed. While at it, also add "-u" to catch
possible uses of uninitialized variables.

Also, replace && with ; for multiple commands. Technically this is not
required for the fix, but since having set -e results in implicit &&,
there is no need to have && explicitly. In other words, this change is
more like a reminder that we do not have to use && here.

Fixes: 8589e2e
Signed-off-by: Kir Kolyshkin <[email protected]>

Makefile: rm .SHELLFLAGS, add set -e