--- gzip-1.4/gzip.c.orig	2012-04-16 11:27:08.478456051 -0700

+++ gzip-1.4/gzip.c	2012-04-23 13:06:53.395234301 -0700

@@ -1699,36 +1699,25 @@

     int fd;

     char *dir;

 {

+    struct dirent **namelist;

     struct dirent *dp;

-    DIR      *dirp;

     char     nbuf[MAX_PATH_LEN];

-    int      len;

+    int      len, n;

-    dirp = fdopendir (fd);

-

-    if (dirp == NULL) {

+    /* Adjusted to use scandir to prevent compressing files multiple times

+     * on file systems that use a hash lookup for directory entries (such

+     * as btrfs and ZFS.

+     */

+    if ((n = scandir(dir, &namelist, 0, NULL)) < 0) {

 	progerror(dir);

 	close (fd);

 	return ;

     }

-    /*

-     ** WARNING: the following algorithm could occasionally cause

-     ** compress to produce error warnings of the form "<filename>.gz

-     ** already has .gz suffix - ignored". This occurs when the

-     ** .gz output file is inserted into the directory below

-     ** readdir's current pointer.

-     ** These warnings are harmless but annoying, so they are suppressed

-     ** with option -r (except when -v is on). An alternative

-     ** to allowing this would be to store the entire directory

-     ** list in memory, then compress the entries in the stored

-     ** list. Given the depth-first recursive algorithm used here,

-     ** this could use up a tremendous amount of memory. I don't

-     ** think it's worth it. -- Dave Mack

-     ** (An other alternative might be two passes to avoid depth-first.)

-     */

-

-    while ((errno = 0, dp = readdir(dirp)) != NULL) {

+    while (n--) {

+	if (errno != 0)

+	    break;

+	dp = namelist[n];

 	if (strequ(dp->d_name,".") || strequ(dp->d_name,"..")) {

 	    continue;

 	}

@@ -1747,6 +1736,7 @@

 	    }

 	    strcpy(nbuf+len, dp->d_name);

 	    treat_file(nbuf);

+	    free(dp);

 	} else {

 	    fprintf(stderr,"%s: %s/%s: pathname too long\n",

 		    program_name, dir, dp->d_name);

@@ -1755,8 +1745,8 @@

     }

     if (errno != 0)

 	progerror(dir);

-    if (CLOSEDIR(dirp) != 0)

-	progerror(dir);

+

+    free(namelist);

 }

 #endif /* ! NO_DIR */