tar: ENFILE is like EMFILE

* src/create.c (open_failure_recover):
* src/misc.c (fdbase_opendir):
Treat ENFILE like EMFILE.

src/create.c

@@ -1230,7 +1230,7 @@ ensure_slash (char **pstr)
 /* If we just ran out of file descriptors, release a file descriptor
    in the directory chain somewhere leading from DIR->parent->parent
    up through the root.  Return true if successful, false (preserving
-   errno == EMFILE) otherwise.
+   errno) otherwise.
 
    Do not release DIR's file descriptor, or DIR's parent, as other
    code assumes that they work.  On some operating systems, another
@@ -1241,7 +1241,8 @@ ensure_slash (char **pstr)
 static bool
 open_failure_recover (struct tar_stat_info const *dir)
 {
-  if (errno == EMFILE && dir && dir->parent)
+  int err = errno;
+  if ((err == EMFILE || err == ENFILE) && dir && dir->parent)
     {
       struct tar_stat_info *p;
       for (p = dir->parent->parent; p; p = p->parent)
@@ -1250,7 +1251,7 @@ open_failure_recover (struct tar_stat_info const *dir)
 	    tar_stat_close (p);
 	    return true;
 	  }
-      errno = EMFILE;
+      errno = err;
     }
 
   return false;

src/misc.c

@@ -1238,13 +1238,13 @@ fdbase_opendir (char const *file_name, bool alternate)
 	  if (subfd < 0)
 	    {
 	      /* Keep the old directory cached and report open failure,
-		 unless EMFILE means it's possible that falling
+		 unless EMFILE/ENFILE means it's possible that falling
 		 through to close the old directory would mean we
 		 could successfully retry from the chdir_fd level.
 	         When reporting failure, there is no need to
 	         null-terminate the old directory, since the code does
 	         not assume null termination.  */
-	      if (errno != EMFILE)
+	      if (errno != EMFILE && errno != ENFILE)
 		return (struct fdbase) { .fd = BADFD, .base = base };
 	    }
 	  else