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

1 files changed, 13 insertions, 13 deletions

diff --git a/libbb/recursive_action.c b/libbb/recursive_action.c
index be2a700f5..cb3b88d1d 100644
--- a/libbb/recursive_action.c
+++ b/libbb/recursive_action.c
@@ -46,7 +46,7 @@ int recursive_action(const char *fileName,
                 int (*fileAction)(const char *fileName, struct stat *statbuf, void* userData, int depth),
                 int (*dirAction)(const char *fileName, struct stat *statbuf, void* userData, int depth),
                 void* userData,
-                const unsigned depth)
+                unsigned depth)
 {
         struct stat statbuf;
         int status;
@@ -55,12 +55,13 @@ int recursive_action(const char *fileName,
 
         if (!fileAction) fileAction = true_action;
         if (!dirAction) dirAction = true_action;
-        status = (flags & ACTION_FOLLOWLINKS ? stat : lstat)(fileName, &statbuf);
 
+        status = ACTION_FOLLOWLINKS; /* hijack a variable for bitmask... */
+        if (!depth) status = ACTION_FOLLOWLINKS | ACTION_FOLLOWLINKS_L0;
+        status = ((flags & status) ? stat : lstat)(fileName, &statbuf);
         if (status < 0) {
 #ifdef DEBUG_RECURS_ACTION
-                bb_error_msg("status=%d followLinks=%d TRUE=%d",
-                                status, flags & ACTION_FOLLOWLINKS, TRUE);
+                bb_error_msg("status=%d flags=%x", status, flags);
 #endif
                 goto done_nak_warn;
         }
@@ -82,9 +83,8 @@ int recursive_action(const char *fileName,
 
         if (!(flags & ACTION_DEPTHFIRST)) {
                 status = dirAction(fileName, &statbuf, userData, depth);
-                if (!status) {
+                if (!status)
                         goto done_nak_warn;
-                }
                 if (status == SKIP)
                         return TRUE;
         }
@@ -103,23 +103,23 @@ int recursive_action(const char *fileName,
                 nextFile = concat_subpath_file(fileName, next->d_name);
                 if (nextFile == NULL)
                         continue;
-                /* now descend into it, forcing recursion. */
-                if (!recursive_action(nextFile, flags | ACTION_RECURSE,
-                                fileAction, dirAction, userData, depth+1)) {
+                /* now descend into it (NB: ACTION_RECURSE is set in flags) */
+                if (!recursive_action(nextFile, flags, fileAction, dirAction, userData, depth+1))
                         status = FALSE;
-                }
                 free(nextFile);
         }
         closedir(dir);
-        if ((flags & ACTION_DEPTHFIRST) &&
-                !dirAction(fileName, &statbuf, userData, depth)) {
+
+        if (flags & ACTION_DEPTHFIRST) {
+                if (!dirAction(fileName, &statbuf, userData, depth))
                         goto done_nak_warn;
         }
 
         if (!status)
                 return FALSE;
         return TRUE;
-done_nak_warn:
+
+ done_nak_warn:
         bb_perror_msg("%s", fileName);
         return FALSE;
 }