This fixes several issues with the tests:
Solaris ifconfig needs to be called with '-a'.
Some of the scripts use bash syntax, so bash should be used for them, not /bin/sh.
Solaris netcat is sensitive to order of parameters.
There are some unnecessary errors/warnings that make it difficult to investigate
failed tests.
The test results embed current date which complicates comparison with golden data.

diff -r e42ab76af798 tests/make_test
--- tests/make_test	Thu May 13 13:45:35 2021 +0200
+++ tests/make_test	Thu May 13 13:56:55 2021 +0200
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 result=0
 count=0
@@ -78,11 +78,9 @@
       fi
     printf "\n%s\n" "Testing..." >> "results.log"
     head -n5 "results.log"
-    if ! grep -q "solaris" "results.log"
-      then
         for plik in ${script_path}/recipes/*
           do
-            /bin/sh $plik "$mynetcat" "$mynetstat" "$mybuffer" "$mypython"
+            /bin/bash $plik "$mynetcat" "$mynetstat" "$mybuffer" "$mypython"
             state=$?
             if [ "$state" -eq 0 ]
               then # $state=0
@@ -103,11 +101,6 @@
         printf "%s\n" "summary: success $count, skip $skip, fail $fail" >> "results.log"
         printf "%s\n" "./make_test finished"
         cd ..
-      else # skip make test for solaris
-        printf "%s\n" "./make_test skipped"
-        printf "%s\n" "./make_test skipped" >> "results.log"
-        #result=125
-      fi
   else # netcat not found
     printf "%s\n" "./make_test skipped"
     #result=125
diff -r e42ab76af798 tests/test_library
--- tests/test_library	Thu May 13 13:45:35 2021 +0200
+++ tests/test_library	Thu May 13 13:56:55 2021 +0200
@@ -300,14 +301,14 @@
     then # nc
       if man "$mynetcat" | grep -q  "error to use this option in conjunction"
         then # BSD nc
-              cat "nodata" | $mybuffer $opt_buf $mynetcat -l "$http_nc" -vvv > "temp.log" 2>> "stderr_nc.log" &
+              cat "nodata" | $mybuffer $opt_buf $mynetcat -vvv -l "$http_nc" > "temp.log" 2>> "stderr_nc.log" &
         else # traditional nc
               cat "nodata" | $mybuffer $opt_buf $mynetcat -l -p "$http_nc" -s 127.0.0.1 -vvv > "temp.log" 2>> "stderr_nc.log" &
         fi
       pid_nc=$!
       if check_listening "$http_nc"
         then
-          printf "%-35s\t%s\n" "test $1" "$2" | $mynetcat 127.0.0.1 "$http1" -vv 1>&2 2>> "stderr_nc.log" &
+          printf "%-35s\t%s\n" "test $1" "$2" | $mynetcat -vv 127.0.0.1 "$http1" 1>&2 2>> "stderr_nc.log" &
           pid_nce=$!
           if [ "$2" = "shouldn't work" ]
             then
@@ -353,7 +354,7 @@
   # $1 = test name
 
   mkfifo "nodata" 2>> "stderr_nc.log"
-  cat "nodata" | $mybuffer $opt_buf $mynetcat 127.0.0.1 "$http1" -vv >"temp.log" 2>> "stderr_nc.log" &
+  cat "nodata" | $mybuffer $opt_buf $mynetcat -vv 127.0.0.1 "$http1" >"temp.log" 2>> "stderr_nc.log" &
   pid_nce=$(pgrep -P $!)
   waiting_for "temp" "test $1"
   kill -TERM ${pid_nce} 2>> "stderr_nc.log"
diff -r 6ec9667b5480 tests/test_library
--- tests/test_library	Thu May 13 14:26:39 2021 +0200
+++ tests/test_library	Thu May 13 16:12:39 2021 +0200
@@ -71,7 +71,12 @@
   # $4 = file 2
 
   local result=0
-  if grep -q "$2" "$3" "$4"
+  if [ -z "$4" ]; then
+    grep -q "$2" "$3"
+  else
+    grep -q "$2" "$3" "$4"
+  fi 
+  if [ $? = "0" ]
     then
       if [ $1 = "yes" ]
         then # to find
@@ -230,7 +235,7 @@
   # $1 = file name
   # $2 = process pid
 
-  wait $2
+  /usr/bin/wait $2
   local result=$?
   case $result in
     "0") ;; # expected exit status of the stunnel process
@@ -299,7 +304,7 @@
   printf "\n%s\n" "test $1 - netcat connection" >> "stderr_nc.log"
   if [ "$mynetcat" = "nc" ]
     then # nc
-      if man "$mynetcat" | grep -q  "error to use this option in conjunction"
+      if man "$mynetcat" 2>/dev/null | grep -q  "error to use this option in conjunction"
         then # BSD nc
               cat "nodata" | $mybuffer $opt_buf $mynetcat -vvv -l "$http_nc" > "temp.log" 2>> "stderr_nc.log" &
         else # traditional nc
@@ -357,7 +362,7 @@
   cat "nodata" | $mybuffer $opt_buf $mynetcat -vv 127.0.0.1 "$http1" >"temp.log" 2>> "stderr_nc.log" &
   pid_nce=$(pgrep -P $!)
   waiting_for "temp" "test $1"
-  kill -TERM ${pid_nce} 2>> "stderr_nc.log"
+  [ -z "${pid_nce}" ] || kill -TERM ${pid_nce} 2>> "stderr_nc.log"
   echo "somedata" > "nodata" 2>> "stderr_nc.log"
   rm -f "nodata"
   return 0
@@ -377,7 +382,7 @@
     then
       if connecting_ncat "$1" "success"
         then
-          finding_text "yes" "test $1.*success" "temp.log" "UNUSED PATTERN"
+          finding_text "yes" "test $1.*success" "temp.log" ""
           result=$?
         else # ncat (nc) failed
           result=1
@@ -407,7 +412,7 @@
     then
       if connecting_ncat "$1" "shouldn't work"
         then
-          if ! finding_text "no" "test $1.*shouldn't work" "temp.log" "UNUSED PATTERN"
+          if ! finding_text "no" "test $1.*shouldn't work" "temp.log" ""
             then # ops...stunnel works
               exit_code="shouldn't work"
               result=1
@@ -447,9 +452,9 @@
         fi
       if [ $result -eq 0 ]
         then
-          if finding_text "yes" "test $1.*success" "temp.log" "UNUSED PATTERN"
+          if finding_text "yes" "test $1.*success" "temp.log" ""
             then
-              finding_text "no" "$1_error" "temp.log" "UNUSED PATTERN"
+              finding_text "no" "$1_error" "temp.log" ""
               result=$?
             else
               result=1
@@ -516,9 +521,9 @@
         do
           if connecting_ncat "$1" "success"
             then
-              finding_text "yes" "test $1.*success" "temp.log" "UNUSED PATTERN"
+              finding_text "yes" "test $1.*success" "temp.log" ""
               result=$?
-              if [ $result -eq 0 ] && ! finding_text "no" "$serv" "stunnel.log" "UNUSED PATTERN"
+              if [ $result -eq 0 ] && ! finding_text "no" "$serv" "stunnel.log" ""
                 then # error - second server accepts a client
                   result=1
                 fi
@@ -577,7 +582,7 @@
         do
           if connecting_ncat "$1" "success"
             then
-              finding_text "yes" "test $1.*success" "temp.log" "UNUSED PATTERN"
+              finding_text "yes" "test $1.*success" "temp.log" ""
               result=$?
             else # ncat (nc) failed
               result=1
@@ -652,7 +657,7 @@
         fi
       if [ $result -eq 0 ]
         then
-          finding_text "yes" "test $1.*success" "temp.log" "UNUSED PATTERN"
+          finding_text "yes" "test $1.*success" "temp.log" ""
           result=$?
         fi
       j=$(grep -c "accepted: new session negotiated" "stunnel.log")
@@ -711,7 +716,7 @@
           rm -f "stunnel_all.log"
           if [ $result -eq 0 ]
             then
-              finding_text "yes" "test $1.*success" "temp.log" "UNUSED PATTERN"
+              finding_text "yes" "test $1.*success" "temp.log" ""
               result=$?
             fi
           j=$(grep -c "accepted: new session negotiated" "stunnel.log")
@@ -761,7 +766,7 @@
         fi
       if [ $result -eq 0 ]
         then
-          finding_text "yes" "test $1.*success" "temp.log" "UNUSED PATTERN"
+          finding_text "yes" "test $1.*success" "temp.log" ""
           result=$?
         fi
       j=$(grep -c "accepted: new session negotiated" "stunnel.log")
diff -r 24e78f84fe68 tests/recipes/020_IPv6
--- tests/recipes/020_IPv6	Thu May 13 16:21:18 2021 +0200
+++ tests/recipes/020_IPv6	Thu May 13 16:21:53 2021 +0200
@@ -26,7 +26,7 @@
 # nc does not support IPv6
 if grep -q "IPv6" "results.log" && \
    (([ -n "$(command -v ip)" ] && PATH="${PATH}:/sbin:/usr/sbin" ip address | grep -q "inet6") || \
-   ([ -n "$(command -v ifconfig)" ] && PATH="${PATH}:/sbin:/usr/sbin" ifconfig | grep -q "inet6"))
+   ([ -n "$(command -v ifconfig)" ] && PATH="${PATH}:/sbin:/usr/sbin" ifconfig -a | grep -q "inet6"))
   then
     test_log_for "020_IPv6" "success" "0" "$1" "$2" "$3" 2>> "stderr.log"
     exit $?
diff -r 253a54bda515 tests/make_test
--- tests/make_test	Thu May 13 16:44:22 2021 +0200
+++ tests/make_test	Thu May 13 16:49:24 2021 +0200
@@ -78,7 +78,8 @@
       fi
     printf "\n%s\n" "Testing..." >> "results.log"
     head -n5 "results.log"
-        for plik in ${script_path}/recipes/*
+	# ignore patch backup suffixes
+        for plik in $(find ${script_path}/recipes/ -type f | sort | grep -v '\.~.~$')
           do
             /bin/bash $plik "$mynetcat" "$mynetstat" "$mybuffer" "$mypython"
             state=$?
diff -r 6e177249e34c tests/make_test
--- tests/make_test	Thu May 13 18:04:39 2021 +0200
+++ tests/make_test	Thu May 13 18:05:18 2021 +0200
@@ -69,7 +69,6 @@
     rm -rf "${result_path}"
     mkdir "${result_path}"
     cd "${result_path}"
-    date > "results.log"
     ../../src/stunnel -version 2>> "results.log"
     if [ -n "$(command -v fips-mode-setup)" ]
       then