tests: avoid the :> construct which can hide errors

On most shells `:>file || framework_failure_` will not evaluate
the framework_failure_ even if there was an error writing the file.
shells which do evaluate the failure are ksh 93u+ and bash 4.2,
while shells wich don't include bash 4.3, solaris, freebsd, dash.

Furthermore this construct is problematic on Solaris 10 sh,
which will try to optimize away a `:' command in a loop
after the first iteration, even if it is redirected.

* tests/cp/link-deref.sh: Remove the leading colon on redirections.
* tests/cp/reflink-perm.sh: Likewise.
* tests/id/zero.sh: Likewise.
* tests/install/install-C.sh: Likewise.
* tests/misc/env.sh: Likewise.
* tests/misc/md5sum-bsd.sh: Likewise.
* tests/misc/runcon-no-reorder.sh: Likewise.
* tests/mv/partition-perm.sh: Likewise.
* tests/rm/r-root.sh: Likewise.
* tests/split/l-chunk.sh: Likewise.
* tests/split/line-bytes.sh: Likewise.
* tests/tail-2/inotify-rotate.sh: Likewise.
* tests/tail-2/retry.sh: Likewise.
* tests/tail-2/symlink.sh: Likewise.
* tests/tail-2/wait.sh: Likewise.
* tests/touch/read-only.sh: Likewise.
+ cfg.mk (sc_prohibit_colon_redirection): A new syntax check
to avoid further instances of this creeping in.

4 files changed, 5 insertions, 5 deletions

diff --git a/tests/tail-2/inotify-rotate.sh b/tests/tail-2/inotify-rotate.sh
index a95f4eccb..1c942cc3d 100755
--- a/tests/tail-2/inotify-rotate.sh
+++ b/tests/tail-2/inotify-rotate.sh
@@ -47,7 +47,7 @@ for i in $(seq 50); do
     # Normally less than a second is required here, but with heavy load
     # and a lot of disk activity, even 20 seconds is insufficient, which
     # leads to this timeout killing tail before the "ok" is written below.
-    :>k && :>x || framework_failure_ failed to initialize files
+    >k && >x || framework_failure_ failed to initialize files
     timeout 40 tail -F k > out 2>&1 &
     pid=$!
     sleep .1
diff --git a/tests/tail-2/retry.sh b/tests/tail-2/retry.sh
index 5b74b7402..dbe66a4e1 100755
--- a/tests/tail-2/retry.sh
+++ b/tests/tail-2/retry.sh
@@ -45,7 +45,7 @@ grep -F 'tail: warning: --retry ignored' out || fail=1
 # === Test:
 # Ensure that "tail --retry --follow=name" waits for the file to appear.
 # Clear 'out' so that we can check its contents without races
-:>out                           || framework_failure_
+>out                            || framework_failure_
 timeout 10 tail -s.1 --follow=name --retry missing >out 2>&1 & pid=$!
 retry_delay_ wait4lines_ .1 6 1 || fail=1  # Wait for "cannot open" error.
 echo "X" > missing              || fail=1
diff --git a/tests/tail-2/symlink.sh b/tests/tail-2/symlink.sh
index 362cb6353..b21f9e15c 100755
--- a/tests/tail-2/symlink.sh
+++ b/tests/tail-2/symlink.sh
@@ -32,7 +32,7 @@ wait4lines_ ()
 # Ensure changing targets of cli specified symlinks are handled.
 # Prior to v8.22, inotify would fail to recognize changes in the targets.
 # Clear 'out' so that we can check its contents without races.
-:>out                           || framework_failure_
+>out                            || framework_failure_
 ln -nsf target symlink          || framework_failure_
 timeout 10 tail -s.1 -F symlink >out 2>&1 & pid=$!
 retry_delay_ wait4lines_ .1 6 1 || fail=1  # Wait for "cannot open..."
@@ -50,7 +50,7 @@ rm -f target out           || framework_failure_
 # Ensure we correctly handle the source symlink itself changing.
 # I.E. that we don't operate solely on the targets.
 # Clear 'out' so that we can check its contents without races.
-:>out                           || framework_failure_
+>out                            || framework_failure_
 echo "X1" > target1             || framework_failure_
 ln -nsf target1 symlink         || framework_failure_
 timeout 10 tail -s.1 -F symlink >out 2>&1 & pid=$!
diff --git a/tests/tail-2/wait.sh b/tests/tail-2/wait.sh
index 42a93bfe6..13898acf1 100755
--- a/tests/tail-2/wait.sh
+++ b/tests/tail-2/wait.sh
@@ -52,7 +52,7 @@ for inotify in ---disable-inotify ''; do
   grep -Ev 'inotify (resources exhausted|cannot be used)' tail.err > x
   mv x tail.err
   test -s tail.err && fail=1
-  :>tail.err
+  >tail.err
 
   tail_F()
   {