Am Dienstag, den 02.09.2008, 17:59 +0300 schrieb Vesa Jääskeläinen:
> Felix Zielcke wrote:
>
> sizeof returns type of size_t so it would be good that char k uses that.
> I am a bit surprised that this didn't generate compiler warning?
Well somewhere hidden in a mail from me, I think I already wrote that I
already got the idea to make these warnings more visible :)
I didn't look yet further into it, maybe even a [RFC] topic should be
made for this.
I'm thinking about how linux kernel compiling works.
Actually I haven't checked that code ;)
> And there is no reason to define integers as constants unless you really
> want to make sure they don't change :)
This is just a thing left from my previous coding experience.
As I started to code I personally just prefer that, but yeah gcc is so
nice and optimizes (almost) everything for us and this code is so little
anyway :)
> > + p = strchr (os_dev, 'p');
> > + if (p)
> > + *p = ',';
>
> It is usually a bad idea to modify source string.
Urm right this is util/ no need to save a few bytes :)
Thanks for your suggestions Vesa.
It really looks now better compared to the first code I sent about this
problem and it only uses now 3 variables :)
--
Felix Zielcke
2008-09-02 Felix Zielcke <[EMAIL PROTECTED]>
* util/getroot.c: Include <config.h>.
(grub_util_get_grub_dev): Rewritten to use asprintf for mdraid devices,
add support for /dev/md/N devices and handle LVM double dash escaping.
Index: util/getroot.c
===================================================================
--- util/getroot.c (Revision 1845)
+++ util/getroot.c (Arbeitskopie)
@@ -17,6 +17,7 @@
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <config.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
@@ -417,62 +418,52 @@ grub_util_get_grub_dev (const char *os_d
switch (grub_util_get_dev_abstraction (os_dev))
{
case GRUB_DEV_ABSTRACTION_LVM:
- grub_dev = xmalloc (strlen (os_dev) - 12 + 1);
-
- strcpy (grub_dev, os_dev + 12);
+ {
+ unsigned short i, len;
+ grub_size_t offset = sizeof ("/dev/mapper/") - 1;
+
+ len = strlen (os_dev) - offset;
+ grub_dev = xmalloc (len);
+
+ for (i = 0; i <= len; i++, offset++)
+ {
+ grub_dev[i] = os_dev[offset];
+ if (os_dev[offset] == '-' && os_dev[offset + 1] == '-')
+ offset++;
+ }
+ }
+
break;
case GRUB_DEV_ABSTRACTION_RAID:
- grub_dev = xmalloc (20);
if (os_dev[7] == '_' && os_dev[8] == 'd')
{
- const char *p;
-
/* This a partitionable RAID device of the form /dev/md_dNNpMM. */
- int i;
-
- grub_dev[0] = 'm';
- grub_dev[1] = 'd';
- i = 2;
- p = os_dev + 9;
- while (*p >= '0' && *p <= '9')
- {
- grub_dev[i] = *p;
- i++;
- p++;
- }
+ char *p , *q;
- if (*p == '\0')
- grub_dev[i] = '\0';
- else if (*p == 'p')
- {
- p++;
- grub_dev[i] = ',';
- i++;
-
- while (*p >= '0' && *p <= '9')
- {
- grub_dev[i] = *p;
- i++;
- p++;
- }
+ p = strdup (os_dev + sizeof ("/dev/md_d") - 1);
- grub_dev[i] = '\0';
- }
- else
- grub_util_error ("Unknown kind of RAID device `%s'", os_dev);
+ q = strchr (p, 'p');
+ if (q)
+ *q = ',';
+
+ asprintf (&grub_dev, "md%s", p);
+ free (p);
}
else if (os_dev[7] >= '0' && os_dev[7] <= '9')
{
- memcpy (grub_dev, os_dev + 5, 7);
- grub_dev[7] = '\0';
+ asprintf (&grub_dev, "md%s", os_dev + sizeof ("/dev/md") - 1);
+ }
+ else if (os_dev[7] == '/' && os_dev[8] >= '0' && os_dev[8] <= '9')
+ {
+ asprintf (&grub_dev, "md%s", os_dev + sizeof ("/dev/md/") - 1);
}
else
grub_util_error ("Unknown kind of RAID device `%s'", os_dev);
-
+
break;
default: /* GRUB_DEV_ABSTRACTION_NONE */
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