hush: add a test which fails due to uclibc bug in getopt()

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

shell/ash_test/ash-getopts/getopt_test_libc_bug.right

@@ -0,0 +1,26 @@
+*** optstring:'ac' args:-a -b -c -d e
+1 rc:0 var:'a' OPTIND:2 OPTARG:''
+Illegal option -b
+2 rc:0 var:'?' OPTIND:3 OPTARG:''
+3 rc:0 var:'c' OPTIND:4 OPTARG:''
+Illegal option -d
+4 rc:0 var:'?' OPTIND:5 OPTARG:''
+5 rc:1 var:'?' OPTIND:5 OPTARG:''
+
+*** optstring:'ac' args:-a -b -c -d e
+1 rc:0 var:'a' OPTIND:2 OPTARG:''
+Illegal option -b
+2 rc:0 var:'?' OPTIND:3 OPTARG:''
+3 rc:0 var:'c' OPTIND:4 OPTARG:''
+Illegal option -d
+4 rc:0 var:'?' OPTIND:5 OPTARG:''
+5 rc:1 var:'?' OPTIND:5 OPTARG:''
+
+*** optstring:'ac' args:-a -b -c -d e
+1 rc:0 var:'a' OPTIND:2 OPTARG:''
+Illegal option -b
+2 rc:0 var:'?' OPTIND:3 OPTARG:''
+3 rc:0 var:'c' OPTIND:4 OPTARG:''
+Illegal option -d
+4 rc:0 var:'?' OPTIND:5 OPTARG:''
+5 rc:1 var:'?' OPTIND:5 OPTARG:''

shell/ash_test/ash-getopts/getopt_test_libc_bug.tests

@@ -0,0 +1,38 @@
+# This test can fail with libc with buggy getopt() implementation.
+# If getopt() wants to parse multi-option args (-abc),
+# it needs to remember a position withit current arg.
+#
+# If this position is kept as a POINTER, not an offset,
+# and if argv[] ADDRESSES (not contents!) change, it blows up.
+
+echo "*** optstring:'ac' args:-a -b -c -d e"
+getopts "ac" var -a -b -c -d e; echo "1 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+getopts "ac" var -a -b -c -d e; echo "2 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+getopts "ac" var -a -b -c -d e; echo "3 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+getopts "ac" var -a -b -c -d e; echo "4 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+getopts "ac" var -a -b -c -d e; echo "5 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+
+# Above: args are (usually) in the same locations in memory.
+# Below: variable allocations change the location.
+
+echo
+echo "*** optstring:'ac' args:-a -b -c -d e"
+unset OPTIND
+OPTARG=QWERTY; getopts "ac" var -a -b -c -d e; echo "1 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+NEWVAR=NEWVAL; getopts "ac" var -a -b -c -d e; echo "2 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+VAR111=NEWVAL; getopts "ac" var -a -b -c -d e; echo "3 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+VAR222=NEWVAL; getopts "ac" var -a -b -c -d e; echo "4 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+VAR333=NEWVAL; getopts "ac" var -a -b -c -d e; echo "5 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+
+# Sligntly different attempts to force reallocations
+
+echo
+echo "*** optstring:'ac' args:-a -b -c -d e"
+unset OPTIND
+export OPTARG; getopts "ac" var -a -b -c -d e; echo "1 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+export NEWVAR; getopts "ac" var -a -b -c -d e; echo "2 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+export VAR111; getopts "ac" var -a -b -c -d e; echo "3 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+export VAR222; getopts "ac" var -a -b -c -d e; echo "4 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+export VAR333; getopts "ac" var -a -b -c -d e; echo "5 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+
+# All copies of code above should generate identical output

shell/hush_test/hush-getopts/getopt_test_libc_bug.right

@@ -0,0 +1,26 @@
+*** optstring:'ac' args:-a -b -c -d e
+1 rc:0 var:'a' OPTIND:2 OPTARG:''
+./getopt_test_libc_bug.tests: invalid option -- b
+2 rc:0 var:'?' OPTIND:3 OPTARG:''
+3 rc:0 var:'c' OPTIND:4 OPTARG:''
+./getopt_test_libc_bug.tests: invalid option -- d
+4 rc:0 var:'?' OPTIND:5 OPTARG:''
+5 rc:1 var:'?' OPTIND:5 OPTARG:''
+
+*** optstring:'ac' args:-a -b -c -d e
+1 rc:0 var:'a' OPTIND:2 OPTARG:''
+./getopt_test_libc_bug.tests: invalid option -- b
+2 rc:0 var:'?' OPTIND:3 OPTARG:''
+3 rc:0 var:'c' OPTIND:4 OPTARG:''
+./getopt_test_libc_bug.tests: invalid option -- d
+4 rc:0 var:'?' OPTIND:5 OPTARG:''
+5 rc:1 var:'?' OPTIND:5 OPTARG:''
+
+*** optstring:'ac' args:-a -b -c -d e
+1 rc:0 var:'a' OPTIND:2 OPTARG:''
+./getopt_test_libc_bug.tests: invalid option -- b
+2 rc:0 var:'?' OPTIND:3 OPTARG:''
+3 rc:0 var:'c' OPTIND:4 OPTARG:''
+./getopt_test_libc_bug.tests: invalid option -- d
+4 rc:0 var:'?' OPTIND:5 OPTARG:''
+5 rc:1 var:'?' OPTIND:5 OPTARG:''

shell/hush_test/hush-getopts/getopt_test_libc_bug.tests

@@ -0,0 +1,38 @@
+# This test can fail with libc with buggy getopt() implementation.
+# If getopt() wants to parse multi-option args (-abc),
+# it needs to remember a position withit current arg.
+#
+# If this position is kept as a POINTER, not an offset,
+# and if argv[] ADDRESSES (not contents!) change, it blows up.
+
+echo "*** optstring:'ac' args:-a -b -c -d e"
+getopts "ac" var -a -b -c -d e; echo "1 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+getopts "ac" var -a -b -c -d e; echo "2 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+getopts "ac" var -a -b -c -d e; echo "3 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+getopts "ac" var -a -b -c -d e; echo "4 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+getopts "ac" var -a -b -c -d e; echo "5 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+
+# Above: args are (usually) in the same locations in memory.
+# Below: variable allocations change the location.
+
+echo
+echo "*** optstring:'ac' args:-a -b -c -d e"
+unset OPTIND
+OPTARG=QWERTY; getopts "ac" var -a -b -c -d e; echo "1 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+NEWVAR=NEWVAL; getopts "ac" var -a -b -c -d e; echo "2 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+VAR111=NEWVAL; getopts "ac" var -a -b -c -d e; echo "3 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+VAR222=NEWVAL; getopts "ac" var -a -b -c -d e; echo "4 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+VAR333=NEWVAL; getopts "ac" var -a -b -c -d e; echo "5 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+
+# Sligntly different attempts to force reallocations
+
+echo
+echo "*** optstring:'ac' args:-a -b -c -d e"
+unset OPTIND
+export OPTARG; getopts "ac" var -a -b -c -d e; echo "1 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+export NEWVAR; getopts "ac" var -a -b -c -d e; echo "2 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+export VAR111; getopts "ac" var -a -b -c -d e; echo "3 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+export VAR222; getopts "ac" var -a -b -c -d e; echo "4 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+export VAR333; getopts "ac" var -a -b -c -d e; echo "5 rc:$? var:'$var' OPTIND:$OPTIND OPTARG:'$OPTARG'"
+
+# All copies of code above should generate identical output