RE: Porting git to HP NonStop

From: Brandon Casey [mailto:drafnel@gmail.com]
Sent: Wednesday, August 22, 2012 7:23 PM
To: Joachim Schmitz
Cc: Junio C Hamano; Shawn Pearce; git@vger.kernel.org;
rsbecker@nexbridge.com
Subject: Re: Porting git to HP NonStop

On Wed, Aug 22, 2012 at 10:18 AM, Joachim Schmitz [off-list ref]
wrote:

quoted

quoted

From: Brandon Casey [mailto:drafnel@gmail.com]
Sent: Wednesday, August 22, 2012 7:01 PM
To: Joachim Schmitz
Cc: Junio C Hamano; Shawn Pearce; git@vger.kernel.org;
rsbecker@nexbridge.com
Subject: Re: Porting git to HP NonStop

On Wed, Aug 22, 2012 at 9:30 AM, Joachim Schmitz
[off-list ref]
wrote:

quoted

OK, so how about this:
/usr/local/bin/diff -EBbu ./compat/mkdir.c.orig ./compat/mkdir.c

--- ./compat/mkdir.c.orig       2012-08-21 05:02:11 -0500
+++ ./compat/mkdir.c    2012-08-21 05:02:11 -0500

@@ -0,0 +1,24 @@
+#include "../git-compat-util.h"
+#undef mkdir
+
+/* for platforms that can't deal with a trailing '/' */ int
+compat_mkdir_wo_trailing_slash(const char *dir, mode_t mode) {
+       int retval;
+       char *tmp_dir = NULL;
+       size_t len = strlen(dir);
+
+       if (len && dir[len-1] == '/') {
+               if ((tmp_dir = strdup(dir)) == NULL)
+                       return -1;
+               tmp_dir[len-1] = '\0';
+       }
+       else
+               tmp_dir = (char *)dir;
+
+       retval = mkdir(tmp_dir, mode);
+       if (tmp_dir != dir)
+               free(tmp_dir);
+
+       return retval;
+}

Why not rearrange this so that you assign to dir the value of tmp_dir
and then just pass dir to mkdir.  Then you can avoid the recast of
dir to (char*) in the else branch.  Later, just call free(tmp_dir).
Also, we have xstrndup.  So I think the body of your function can become

something like:

quoted

quoted

   if (len && dir[len-1] == '/')
       dir = tmp_dir = xstrndup(dir, len-1);

xstndup() can't fail?

Correct.  It will either succeed or die.  It will also try to free up some memory
used by git if possible.

OK. So let's use that then.

Bye, Jojo