tail: only retry file open if --retry specifed

* src/tail.c (tail_file): On failure to open a file,
set ignore=true when --retry is not specified.
* tests/tail-2/assert-2.sh: Adjust to the new behavior.
* tests/tail-2/retry.sh: Add a test case.  Also change
from `tail ... && fail=1` to the more robust `returns_ 1 ...`
construct which detects segfaults etc.
* NEWS: Document the fix.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/tail.c b/src/tail.c
index 66aad5b78..193e4fd7d 100644
--- a/src/tail.c
+++ b/src/tail.c
@@ -1909,7 +1909,7 @@ tail_file (struct File_spec *f, uintmax_t n_units)
         {
           f->fd = -1;
           f->errnum = errno;
-          f->ignore = false;
+          f->ignore = ! reopen_inaccessible_files;
           f->ino = 0;
           f->dev = 0;
         }