md5_sha1_sum: fix mishandling when run as /bin/md5sum (with path)

chown/chgrp: completely match coreutils 6.8 wrt symlink handling

function                                             old     new   delta
recursive_action                                     411     422     +11
arith                                               2033    2042      +9
collect_blk                                          467     474      +7
dhcprelay_main                                      1122    1125      +3
fsck_main                                           1909    1911      +2
singlemount                                         4555    4547      -8
xmalloc_realpath                                      14       -     -14
get_lcm                                              123     105     -18
ed_main                                             3111    3084     -27
chown_main                                           217     183     -34
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 5/4 up/down: 32/-101)           Total: -69 bytes
   text    data     bss     dec     hex filename
 684132    2744   14000  700876   ab1cc busybox_old
 684060    2744   14000  700804   ab184 busybox_unstripped

2 files changed, 32 insertions, 30 deletions

diff --git a/coreutils/chown.c b/coreutils/chown.c
index 7579e1735..eb8d8c450 100644
--- a/coreutils/chown.c
+++ b/coreutils/chown.c
@@ -65,6 +65,7 @@ int chown_main(int argc, char **argv);
 int chown_main(int argc, char **argv)
 {
         int retval = EXIT_SUCCESS;
+        int flags;
         chown_fptr chown_func;
 
         opt_complementary = "-2";
@@ -80,23 +81,21 @@ int chown_main(int argc, char **argv)
                 chown_func = lchown;
         }
 
+        flags = ACTION_DEPTHFIRST; /* match coreutils order */
+        if (OPT_RECURSE)
+                flags |= ACTION_RECURSE;
+        if (OPT_TRAVERSE_TOP)
+                flags |= ACTION_FOLLOWLINKS_L0; /* -H/-L: follow links on depth 0 */
+        if (OPT_TRAVERSE)
+                flags |= ACTION_FOLLOWLINKS; /* follow links if -L */
+
         parse_chown_usergroup_or_die(&ugid, argv[0]);
 
         /* Ok, ready to do the deed now */
         argv++;
         do {
-                char *arg = *argv;
-
-                if (OPT_TRAVERSE_TOP) {
-                        /* resolves symlink (even recursive) */
-                        arg = xmalloc_realpath(arg);
-                        if (!arg)
-                                continue;
-                }
-
-                if (!recursive_action(arg,
-                                (OPT_RECURSE ? ACTION_RECURSE : 0) | /* recurse */
-                                (OPT_TRAVERSE ? ACTION_FOLLOWLINKS : 0),/* follow links if -L */
+                if (!recursive_action(*argv,
+                                flags,          /* flags */
                                 fileAction,     /* file action */
                                 fileAction,     /* dir action */
                                 chown_func,     /* user data */
@@ -104,9 +103,6 @@ int chown_main(int argc, char **argv)
                 ) {
                         retval = EXIT_FAILURE;
                 }
-
-                if (OPT_TRAVERSE_TOP)
-                        free(arg);
         } while (*++argv);
 
         return retval;
@@ -137,8 +133,10 @@ create() {
 tst() {
     create test1
     create test2
-    (cd test1; $t1 $1)
-    (cd test2; $t2 $1)
+    echo "[$1]" >>test1.out
+    echo "[$1]" >>test2.out
+    (cd test1; $t1 $1) >>test1.out 2>&1
+    (cd test2; $t2 $1) >>test2.out 2>&1
     (cd test1; ls -lnR) >out1
     (cd test2; ls -lnR) >out2
     echo "chown $1" >out.diff
@@ -152,18 +150,22 @@ tst_for_each() {
     tst "$1 1:1 linkfile"
 }
 echo "If script produced 'out.diff' file, then at least one testcase failed"
+>test1.out
+>test2.out
 # These match coreutils 6.8:
-tst_for_each ""
-tst_for_each "-R"
-tst_for_each "-RP"
-tst_for_each "-RL"
-tst_for_each "-RH"
-tst_for_each "-h"
-tst_for_each "-hR"
-tst_for_each "-hRP"
-# Below: with "chown linkdir" coreutils 6.8 will chown linkdir _target_,
-# we lchown _the link_. I believe we are "more correct".
-#tst_for_each "-hRL"
-#tst_for_each "-hRH"
+tst_for_each "-v"
+tst_for_each "-vR"
+tst_for_each "-vRP"
+tst_for_each "-vRL"
+tst_for_each "-vRH"
+tst_for_each "-vh"
+tst_for_each "-vhR"
+tst_for_each "-vhRP"
+tst_for_each "-vhRL"
+tst_for_each "-vhRH"
+# Fix `name' in coreutils output
+sed 's/`/'"'"'/g' -i test2.out
+# Compare us with coreutils output
+diff -u test1.out test2.out
 
 */
diff --git a/coreutils/md5_sha1_sum.c b/coreutils/md5_sha1_sum.c
index 4523fa4ec..8bc203486 100644
--- a/coreutils/md5_sha1_sum.c
+++ b/coreutils/md5_sha1_sum.c
@@ -84,7 +84,7 @@ int md5_sha1_sum_main(int argc, char **argv)
         uint8_t *hash_value;
         unsigned flags;
         hash_algo_t hash_algo = ENABLE_MD5SUM
-                ? (ENABLE_SHA1SUM ? (**argv=='m' ? HASH_MD5 : HASH_SHA1) : HASH_MD5)
+                ? (ENABLE_SHA1SUM ? (applet_name[0] == 'm' ? HASH_MD5 : HASH_SHA1) : HASH_MD5)
                 : HASH_SHA1;
 
         if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK)