tests: add TestDiskFull

Also fix incomplete uid restoration in TestSupplementaryGroups
and replace syscall.Setregid and friends with unix.Setregid and
friends.

This test is added to check if have problems handling a full disk.
The ticket https://github.com/rfjakob/gocryptfs/issues/550 states
that the full disk was not where the backing gocryptfs filesystem
was, but this has no effect on gocryptfs, so we test the harder
case.

1 files changed, 1 insertions, 2 deletions

diff --git a/test.bash b/test.bash
index 266a875..091f0ac 100755
--- a/test.bash
+++ b/test.bash
@@ -85,8 +85,7 @@ if grep -R "panic(" ./*.go internal ; then
 fi
 
 # All functions from the commit msg in https://go-review.googlesource.com/c/go/+/210639
-if grep -R -E 'syscall.(Setegid|Seteuid|Setgroups|Setgid|Setregid|Setreuid|Setresgid|Setresuid|Setuid)\(' \
-	./*.go internal ; then
+if find . -type f -name \*.go -print0 | xargs -0 grep -E 'syscall.(Setegid|Seteuid|Setgroups|Setgid|Setregid|Setreuid|Setresgid|Setresuid|Setuid)\(' ; then
 	echo "$MYNAME: You probably want to use unix.Setgroups and friends. See the comments in OpenatUser() for why."
 	exit 1
 fi