sys_util: cleanup shared mem file after test

Running "build_test" fails if it's been previously run using sudo.
The failure is:
thread 'main' panicked at 'error creating shared memory;'
and errno is 17, so apparently the shared memory name is left
behind.

BUG=None
TEST=Verified that "sudo build_teat" followed by "build_test" results in
a failure, while with this change it reports success.

Change-Id: I09748b9c0b89ac953e054de852277d819ad85287
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1876662
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Matt Delco <delco@chromium.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/sys_util/src/syslog.rs b/sys_util/src/syslog.rs
index 82b7137..232f046 100644
--- a/sys_util/src/syslog.rs
+++ b/sys_util/src/syslog.rs
@@ -610,6 +610,7 @@ mod tests {
             shm_unlink(shm_name.as_ptr());
             let fd = shm_open(shm_name.as_ptr(), O_RDWR | O_CREAT | O_EXCL, 0666);
             assert!(fd >= 0, "error creating shared memory;");
+            shm_unlink(shm_name.as_ptr());
             File::from_raw_fd(fd)
         };