hush: output bash-compat killing signal names

This significantly syncronises ash-signals and hush-signals tests.

function                                             old     new   delta
process_wait_result                                  449     450      +1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

shell/ash_test/ash-signals/usage.right

@@ -0,0 +1,14 @@
+___
+___
+___
+trap -- 'a' EXIT
+trap -- 'a' INT
+trap -- 'a' USR1
+trap -- 'a' USR2
+___
+___
+trap -- 'a' USR1
+trap -- 'a' USR2
+___
+___
+trap -- 'a' USR2

shell/ash_test/ash-signals/usage.tests

@@ -0,0 +1,23 @@
+# no output -- default state
+echo ___
+trap
+
+# assign some traps
+echo ___
+trap "a" EXIT INT USR1 USR2
+
+# show them all
+echo ___
+trap
+
+# clear one
+echo ___
+trap 0 INT
+echo ___
+trap
+
+# clear another
+echo ___
+trap "-" USR1
+echo ___
+trap

shell/hush.c

@@ -8704,8 +8704,8 @@ static int process_wait_result(struct pipe *fg_pipe, pid_t childpid, int status)
 					 */
 					 && i == fg_pipe->num_cmds-1
 					) {
-						/* TODO: use strsignal() instead for bash compat? but that's bloat... */
+						/* strsignal() is for bash compat. ~600 bloat versus bbox's get_signame() */
-						puts(sig == SIGINT || sig == SIGPIPE ? "" : get_signame(sig));
+						puts(sig == SIGINT || sig == SIGPIPE ? "" : strsignal(sig));
 					}
 					/* TODO: if (WCOREDUMP(status)) + " (core dumped)"; */
 					/* TODO: MIPS has 128 sigs (1..128), what if sig==128 here?

shell/hush_test/hush-misc/sig_exitcode.right

@@ -1,5 +1,5 @@
-KILL
+Killed
 137:137
-KILL
+Killed
 0:0
 Done

shell/hush_test/hush-signals/catch.right

@@ -2,4 +2,4 @@ sending USR2
 caught
 sending USR2
 sending USR2
-USR2
+User defined signal 2

shell/hush_test/hush-signals/signal1.right

@@ -0,0 +1,20 @@
+got signal
+trap -- 'echo got signal' USR1
+sent 1 signal
+got signal
+wait interrupted
+trap -- 'echo got signal' USR1
+sent 2 signal
+got signal
+wait interrupted
+trap -- 'echo got signal' USR1
+sent 3 signal
+got signal
+wait interrupted
+trap -- 'echo got signal' USR1
+sent 4 signal
+got signal
+wait interrupted
+trap -- 'echo got signal' USR1
+sent 5 signal
+sleep completed

shell/hush_test/hush-signals/signal1.tests

@@ -0,0 +1,28 @@
+trap "echo got signal" USR1
+
+for try in 1 2 3 4 5; do
+    kill -USR1 $$
+    sleep 0.2
+    echo "sent $try signal"
+done &
+
+# Ensure "wait" has something to wait for
+sleep 2 &
+
+# Ensure we do not execute "trap" below before "kill -USR1" above
+# (was getting failure on loaded machine without this)
+sleep 0.1
+
+sleeping=true
+while $sleeping; do
+    trap
+    if wait %%; then
+        echo "sleep completed"
+        sleeping=false
+    elif [ $? = 127 ]; then
+        echo "BUG: no processes to wait for?!"
+        sleeping=false
+    else
+        echo "wait interrupted"
+    fi
+done

shell/hush_test/hush-signals/signal_read2.right

@@ -1,2 +1,2 @@
-HUP
+Hangup
 Done:129

shell/hush_test/hush-signals/subshell.right

@@ -17,5 +17,5 @@ Ok
 trap -- '' HUP
 trap -- '' QUIT
 trap -- '' SYS
-TERM
+Terminated
 Done