[RFAv4 4/5] Test the | (pipe) command.

[Philippe Waroquiers <philippe.waroquiers@skynet.be>]

gdb/testsuite/ChangeLog
2019-05-30  Philippe Waroquiers  <philippe.waroquiers@skynet.be>

	* gdb.base/shell.exp: Test pipe command, $_shell_exitcode,
	$_shell_exitsignal.
	* gdb.base/default.exp: Update for new convenience variables.
---
 gdb/testsuite/gdb.base/default.exp |  2 +
 gdb/testsuite/gdb.base/shell.exp   | 90 +++++++++++++++++++++++++++++-
 2 files changed, 91 insertions(+), 1 deletion(-)

diff --git a/gdb/testsuite/gdb.base/default.exp b/gdb/testsuite/gdb.base/default.exp
index 56ec917aa3..0325b8045d 100644
--- a/gdb/testsuite/gdb.base/default.exp
+++ b/gdb/testsuite/gdb.base/default.exp
@@ -606,6 +606,8 @@ set show_conv_list \
 	{$_isvoid = <internal function _isvoid>} \
 	{$_gdb_major = 8} \
 	{$_gdb_minor = 4} \
+	{$_shell_exitsignal = void} \
+	{$_shell_exitcode = 0} \
     }
 if ![skip_python_tests] {
     append show_conv_list \
diff --git a/gdb/testsuite/gdb.base/shell.exp b/gdb/testsuite/gdb.base/shell.exp
index 60d6e31e4f..375575b729 100644
--- a/gdb/testsuite/gdb.base/shell.exp
+++ b/gdb/testsuite/gdb.base/shell.exp
@@ -13,7 +13,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-# Test that the shell and ! commands work.
+# Test that the "shell", "!", "|" and "pipe" commands work.
 
 gdb_exit
 gdb_start
@@ -22,3 +22,91 @@ gdb_test "shell echo foo" "foo"
 
 gdb_test "! echo foo" "foo"
 gdb_test "!echo foo" "foo"
+
+# Convenience variables with shell command.
+gdb_test_no_output "! exit 0"
+gdb_test "p \$_shell_exitcode" " = 0" "shell success exitcode"
+gdb_test "p \$_shell_exitsignal" " = void" "shell success exitsignal"
+
+gdb_test_no_output "! exit 1"
+gdb_test "p \$_shell_exitcode" " = 1" "shell fail exitcode"
+gdb_test "p \$_shell_exitsignal" " = void" "shell fail exitsignal"
+
+gdb_test_no_output "! kill -2 $$"
+gdb_test "p \$_shell_exitcode" " = void" "shell interrupt exitcode"
+gdb_test "p \$_shell_exitsignal" " = 2" "shell interrupt exitsignal"
+
+# Define the user command "foo", used to test "pipe" command.
+gdb_test_multiple "define foo" "define foo" {
+    -re "End with"  {
+	pass "define foo"
+    }
+}
+gdb_test \
+    [multi_line_input \
+	 { echo coucou\n }\
+	 { echo truc\n }\
+	 { echo machin\n }\
+	 { if $argc > 0 }\
+	 { echo $arg0\n}\
+	 {end}\
+	 {end}] \
+    "" \
+    "enter commands"
+
+
+gdb_test "pipe foo | wc -l" "3" "simple pipe"
+gdb_test "pipe foo brol| wc -l" "4" "simple pipe with arg"
+gdb_test "pipe foo truc2 | grep truc | wc -l" "2" "double pipe"
+
+gdb_test "| foo truc2 | grep truc | wc -l" "2" "double pipe, pipe char"
+gdb_test "|foo|grep truc|wc -l" "1" "no space around pipe char"
+
+gdb_test "echo coucou\\n" "coucou" "echo coucou"
+gdb_test "||wc -l" "1" "repeat previous command"
+
+gdb_test "| -d ! echo this contains a | character\\n ! sed -e 's/|/PIPE/'" \
+    "this contains a PIPE character" "alternate 1char delim"
+
+gdb_test "|-d ! echo this contains a | character\\n!sed -e 's/|/PIPE/'" \
+    "this contains a PIPE character" "alternate 1char delim, no space"
+
+gdb_test "| -d !!! echo this contains a | character\\n !!! sed -e 's/|/PIPE/'" \
+    "this contains a PIPE character" "alternate 3char delim"
+
+gdb_test "|-d !!! echo this contains a | character\\n!!!sed -e 's/|/PIPE/'" \
+    "this contains a PIPE character" "alternate 3char delim, no space"
+
+# Convenience variables with pipe command.
+gdb_test "|p 123| exit 0" ""
+gdb_test "p \$_shell_exitcode" " = 0" "pipe success exitcode"
+gdb_test "p \$_shell_exitsignal" " = void" "pipe success exitsignal"
+
+gdb_test "|p 123| exit 1" ""
+gdb_test "p \$_shell_exitcode" " = 1" "pipe fail exitcode"
+gdb_test "p \$_shell_exitsignal" " = void" "pipe fail exitsignal"
+
+gdb_test "|p 123| kill -2 $$" ""
+gdb_test "p \$_shell_exitcode" " = void" "pipe interrupt exitcode"
+gdb_test "p \$_shell_exitsignal" " = 2" "pipe interrupt exitsignal"
+
+# Error handling verifications.
+gdb_test "|" "Missing COMMAND" "all missing"
+gdb_test "|-d" "Missing delimiter DELIM after -d" "-d value missing"
+gdb_test "|-d    " "Missing delimiter DELIM after -d" "-d spaces value missing"
+gdb_test "| echo coucou" \
+    "Missing delimiter before SHELL_COMMAND" \
+    "| delimiter missing"
+gdb_test "|-d DELIM echo coucou" \
+    "Missing delimiter before SHELL_COMMAND" \
+    "DELIM delimiter missing"
+gdb_test "|echo coucou|" \
+    "Missing SHELL_COMMAND" \
+    "SHELL_COMMAND missing"
+gdb_test "|-d ! echo coucou !" \
+    "Missing SHELL_COMMAND" \
+    "SHELL_COMMAND missing with delimiter"
+gdb_test "|-d! echo coucou ! wc" \
+    "Missing delimiter before SHELL_COMMAND" \
+    "Delimiter missing due to missing space"
+
-- 
2.20.1