touch: implement -d --date (our own testsuite needs that)

function                                             old     new   delta
static.uname_longopts                                  -     137    +137
touch_main                                           231     360    +129
static.touch_longopts                                  -      32     +32
validate_tm_time                                       -      28     +28
packed_usage                                       26616   26624      +8
date_main                                            687     686      -1
static.longopts                                      162       -    -162
------------------------------------------------------------------------------
(add/remove: 3/1 grow/shrink: 2/1 up/down: 334/-163)          Total: 171 bytes

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

testsuite/bunzip2.tests

@@ -517,8 +517,8 @@ if test "${0##*/}" = "bunzip2.tests"; then
     if test1_bz2 | ${bb}bunzip2 >/dev/null \
 	&& test "`test1_bz2 | ${bb}bunzip2 | md5sum`" = "61bbeee4be9c6f110a71447f584fda7b  -"
     then
-	echo "$unpack: test bz2 file: PASS"
+	echo "PASS: $unpack: test bz2 file"
     else
-	echo "$unpack: test bz2 file: FAIL"
+	echo "FAIL: $unpack: test bz2 file"
     fi
 fi

testsuite/bzcat.tests

@@ -32,9 +32,9 @@ prep() {
 check() {
     eval $2 >t_actual 2>&1
     if $ECHO -ne "$expected" | cmp - t_actual; then
-	echo "$1: PASS"
+	echo "PASS: $1"
     else
-	echo "$1: FAIL"
+	echo "FAIL: $1"
     fi
 }
 

testsuite/cp/cp-a-files-to-dir

@@ -3,7 +3,7 @@ echo file number two > file2
 ln -s file2 link1
 mkdir dir1
 # why???
-#touch --date='Sat Jan 29 21:24:08 PST 2000' dir1/file3
+#TZ=UTC0 touch -d '2000-01-30 05:24:08' dir1/file3
 mkdir there
 busybox cp -a file1 file2 link1 dir1 there
 test -f there/file1

testsuite/mv/mv-files-to-dir

@@ -2,7 +2,7 @@ echo file number one > file1
 echo file number two > file2
 ln -s file2 link1
 mkdir dir1
-touch --date='Sat Jan 29 21:24:08 PST 2000' dir1/file3
+TZ=UTC0 touch -d '2000-01-30 05:24:08' dir1/file3
 mkdir there
 busybox mv file1 file2 link1 dir1 there
 test -f there/file1

testsuite/mv/mv-refuses-mv-dir-to-subdir

@@ -2,7 +2,7 @@ echo file number one > file1
 echo file number two > file2
 ln -s file2 link1
 mkdir dir1
-touch --date='Sat Jan 29 21:24:08 PST 2000' dir1/file3
+TZ=UTC0 touch -d '2000-01-30 05:24:08' dir1/file3
 mkdir there
 busybox mv file1 file2 link1 dir1 there
 test -f there/file1

testsuite/runtest

@@ -120,12 +120,17 @@ fi
 
 # Populate a directory with links to all busybox applets
 
-# Note: if $LINKSDIR/applet exists, we do not overwrite it.
-# Useful if one wants to run tests against a standard utility, not an applet.
 LINKSDIR="$bindir/runtest-tempdir-links"
-#rm -rf "$LINKSDIR" 2>/dev/null
+
+# Comment this line out if you have put a different binary in $LINKSDIR
+# (say, a "standard" tool's binary) in order to run tests against it:
+rm -rf "$LINKSDIR" 2>/dev/null
+
 mkdir "$LINKSDIR" 2>/dev/null
 for i in $implemented; do
+	# Note: if $LINKSDIR/applet exists, we do not overwrite it.
+	# Useful if one wants to run tests against a standard utility,
+	# not an applet.
 	ln -s "$bindir/busybox" "$LINKSDIR/$i" 2>/dev/null
 done