1 files changed, 145 insertions, 0 deletions
diff --git a/tests/misc/tee.sh b/tests/misc/tee.sh
new file mode 100755
index 0000000..3daf610
--- /dev/null
+++ b/tests/misc/tee.sh
@@ -0,0 +1,145 @@
+#!/bin/sh
+# test for basic tee functionality.
+
+# Copyright (C) 2005-2023 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ tee
+
+echo line >sample || framework_failure_
+
+# POSIX says: "Processing of at least 13 file operands shall be supported."
+for n in 0 1 2 12 13; do
+  files=$(seq $n)
+  rm -f $files
+  tee $files <sample >out || fail=1
+  for f in out $files; do
+    compare sample $f || fail=1
+  done
+done
+
+# Ensure tee treats '-' as the name of a file, as mandated by POSIX.
+# Between v5.3.0 and v8.23, a '-' argument caused tee to send another
+# copy of input to standard output.
+tee - <sample >out 2>err || fail=1
+compare sample ./- || fail=1
+compare sample out || fail=1
+compare /dev/null err || fail=1
+
+# Ensure tee exits early if no more writable outputs
+if test -w /dev/full && test -c /dev/full; then
+  yes | returns_ 1 timeout 10 tee /dev/full 2>err >/dev/full || fail=1
+  # Ensure an error for each of the 2 outputs
+  # (and no redundant errors for stdout).
+  test $(wc -l < err) = 2 || { cat err; fail=1; }
+
+
+  # Ensure we continue with outputs that are OK
+  seq 10000 > multi_read || framework_failure_
+
+  returns_ 1 tee /dev/full out2 2>err >out1 <multi_read || fail=1
+  cmp multi_read out1 || fail=1
+  cmp multi_read out2 || fail=1
+  # Ensure an error for failing output
+  test $(wc -l < err) = 1 || { cat err; fail=1; }
+
+  returns_ 1 tee out1 out2 2>err >/dev/full <multi_read || fail=1
+  cmp multi_read out1 || fail=1
+  cmp multi_read out2 || fail=1
+  # Ensure an error for failing output
+  test $(wc -l < err) = 1 || { cat err; fail=1; }
+fi
+
+case $host_triplet in
+  *aix*) echo  'avoiding due to no way to detect closed outputs on AIX' ;;
+  *)
+# Test iopoll-powered early exit for closed pipes
+tee_exited() { sleep $1; test -f tee.exited; }
+# Currently this functionality is most useful with
+# intermittent input from a terminal, but here we
+# use an input pipe that doesn't write anything
+# but will exit as soon as tee does, or it times out
+retry_delay_ tee_exited .1 7 | # 12.7s (Must be > following timeout)
+{ timeout 10 tee -p 2>err && touch tee.exited; } | :
+test $(wc -l < err) = 0 || { cat err; fail=1; }
+test -f tee.exited || fail=1 ;;
+esac
+
+# Test with unwritable files
+if ! uid_is_privileged_; then  # root does not get EPERM.
+  touch file.ro || framework_failure_
+  chmod a-w file.ro || framework_failure_
+  returns_ 1 tee -p </dev/null file.ro || fail=1
+fi
+
+mkfifo_or_skip_ fifo
+
+# Ensure tee handles nonblocking output correctly
+# Terminate any background processes
+cleanup_() { kill $pid 2>/dev/null && wait $pid; }
+read_fifo_delayed() {
+  { sleep .1; timeout 10 dd of=/dev/null status=none; } <fifo
+}
+read_fifo_delayed & pid=$!
+dd count=20 bs=100K if=/dev/zero status=none |
+{
+  dd count=0 oflag=nonblock status=none
+  tee || { cleanup_; touch tee.fail; }
+} >fifo
+test -f tee.fail && fail=1 || cleanup_
+
+# Ensure tee honors --output-error modes
+read_fifo() { timeout 10 dd count=1 if=fifo of=/dev/null status=none & }
+
+# Determine platform sigpipe exit status
+read_fifo
+yes >fifo
+pipe_status=$?
+
+# Default operation is to continue on output errors but exit silently on SIGPIPE
+read_fifo
+yes | returns_ $pipe_status timeout 10 tee ./e/noent 2>err >fifo || fail=1
+test $(wc -l < err) = 1 || { cat err; fail=1; }
+
+# With -p, SIGPIPE is suppressed, exit 0 for EPIPE when all outputs finished
+read_fifo
+yes | timeout 10 tee -p 2>err >fifo || fail=1
+test $(wc -l < err) = 0 || { cat err; fail=1; }
+
+# With --output-error=warn, exit 1 for EPIPE when all outputs finished
+read_fifo
+yes | returns_ 1 timeout 10 tee --output-error=warn 2>err >fifo || fail=1
+test $(wc -l < err) = 1 || { cat err; fail=1; }
+
+# With --output-error=exit, exit 1 immediately for EPIPE
+read_fifo
+yes | returns_ 1 timeout 10 tee --output-error=exit /dev/null 2>err >fifo \
+  || fail=1
+test $(wc -l < err) = 1 || { cat err; fail=1; }
+
+# With --output-error=exit, exit 1 immediately on output error
+read_fifo
+yes | returns_ 1 timeout 10 tee --output-error=exit ./e/noent 2>err >fifo \
+  || fail=1
+test $(wc -l < err) = 1 || { cat err; fail=1; }
+
+# With --output-error=exit-nopipe, exit 0 for EPIPE
+read_fifo
+yes | timeout 10 tee --output-error=exit-nopipe 2>err >fifo || fail=1
+test $(wc -l < err) = 0 || { cat err; fail=1; }
+
+wait
+Exit $fail