Update FAQ.
[openssl.git] / test / bctest
index 6fa0663..bdb3218 100755 (executable)
 # running) bc.
 
 
-# Test for SunOS 5.[78] bc bug (or missing bc)
-if [ 0 != "`bc <<\EOF
+IFS=:
+try_without_dir=true
+# First we try "bc", then "$dir/bc" for each item in $PATH.
+for dir in dummy:$PATH; do
+    if [ "$try_without_dir" = true ]; then
+      # first iteration
+      bc=bc
+      try_without_dir=false
+    else
+      # second and later iterations
+      bc="$dir/bc"
+      if [ ! -f "$bc" ]; then  # '-x' is not available on Ultrix
+        bc=''
+      fi
+    fi
+
+    if [ ! "$bc" = '' ]; then
+        failure=none
+
+
+        # Test for SunOS 5.[78] bc bug
+        "$bc" >tmp.bctest <<\EOF
 obase=16
 ibase=16
 a=AD88C418F31B3FC712D0425001D522B3AE9134FF3A98C13C1FCC1682211195406C1A6C66C6A\
@@ -26,17 +46,15 @@ b=DCE91E7D120B983EA9A104B5A96D634DD644C37657B1C7860B45E6838999B3DCE5A555583C6\
 8B3CD64126E1A82E190228020C05B91C8B141F1110086FC2A4C6ED631EBA129D04BB9A19FC53D\
 3ED0E2017D60A68775B75481449
 (a/b)*b + (a%b) - a
-EOF`" ]
-then
-  echo "bc does not work.  Consider installing GNU bc." >&2
-  echo "cat >/dev/null"
-  exit 1
-fi
+EOF
+        if [ 0 != "`cat tmp.bctest`" ]; then
+            failure=SunOStest
+        fi
 
 
-# Test for SCO bc bug.
-if [ "0
-0" != "`bc <<\EOF
+        if [ "$failure" = none ]; then
+            # Test for SCO bc bug.
+            "$bc" >tmp.bctest <<\EOF
 obase=16
 ibase=16
 -FFDD63BA1A4648F0D804F8A1C66C53F0D2110590E8A3907EC73B4AEC6F15AC177F176F2274D2\
@@ -62,23 +80,32 @@ F617E3145BBFBE9AFD0D6E437EA4FF6F04BC67C4F1458B4F0F47B64 - 1C2BBBB19B74E86FD32\
 9E8DB6A8C3B1B9986D57ED5419C2E855F7D5469E35E76334BB42F4C43E3F3A31B9697C171DAC4\
 D97935A7E1A14AD209D6CF811F55C6DB83AA9E6DFECFCD6669DED7171EE22A40C6181615CAF3F\
 5296964
-EOF`" ]
-then
-  echo "bc does not work.  Consider installing GNU bc." >&2
-  echo "cat >/dev/null"
-  exit 1
-fi
+EOF
+            if [ "0
+0" != "`cat tmp.bctest`" ]; then
+                failure=SCOtest
+            fi
+        fi
 
 
-# bc works, good.
-# Now check if it knows the 'print' command.
-if [ "OK" = "`bc 2>/dev/null <<\EOF
-print \"OK\"
-EOF`" ]
-then
-    echo "bc"
-else
-    echo "sed 's/print.*//' | bc"
-fi
+        if [ "$failure" = none ]; then
+            # bc works; now check if it knows the 'print' command.
+            if [ "OK" = "`echo 'print \"OK\"' | $bc 2>/dev/null`" ]
+            then
+                echo "$bc"
+            else
+                echo "sed 's/print.*//' | $bc"
+            fi
+            exit 0
+        fi
+
+        echo "$bc does not work properly ('$failure' failed).  Looking for another bc ..." >&2
+    fi
+done
 
-exit 0
+echo "No working bc found.  Consider installing GNU bc." >&2
+if [ "$1" = ignore ]; then
+  echo "cat >/dev/null"
+  exit 0
+fi
+exit 1