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authorDavidlohr Bueso2011-07-17 18:47:30 +0200
committerKarel Zak2011-07-21 17:49:02 +0200
commita88268b8cc124b6f721ba17ab01a3f6d5800c749 (patch)
tree372c23bac38c76e8ca3dacb5ee65e5f2322694ec /partx
parentdocs: update TODO file (diff)
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partx: get partition number with sysfs lib
Now that we have this feature, there's no need to manually parse sysfs in partx. Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Diffstat (limited to 'partx')
-rw-r--r--partx/Makefile.am1
-rw-r--r--partx/partx.c22
2 files changed, 6 insertions, 17 deletions
diff --git a/partx/Makefile.am b/partx/Makefile.am
index 46fc64172..6a72942fe 100644
--- a/partx/Makefile.am
+++ b/partx/Makefile.am
@@ -6,6 +6,7 @@ dist_man_MANS = addpart.8 delpart.8
usrsbin_exec_PROGRAMS += partx
partx_SOURCES = partx.c partx.h \
$(top_srcdir)/lib/blkdev.c \
+ $(top_srcdir)/lib/sysfs.c \
$(top_srcdir)/lib/tt.c \
$(top_srcdir)/lib/at.c \
$(top_srcdir)/lib/mbsalign.c \
diff --git a/partx/partx.c b/partx/partx.c
index d8a4119c2..e29e50dcc 100644
--- a/partx/partx.c
+++ b/partx/partx.c
@@ -30,6 +30,7 @@
#include "strutils.h"
#include "xalloc.h"
#include "partx.h"
+#include "sysfs.h"
#include "at.h"
/* this is the default upper limit, could be modified by --nr */
@@ -123,8 +124,6 @@ static int column_name_to_id(const char *name, size_t namesz)
*
* Note that this function tries to use sysfs, otherwise it assumes that the
* last characters are always numeric (sda1, sdc20, etc).
- *
- * Returns -1 on error.
*/
static int get_partno_from_device(char *partition, dev_t devno)
{
@@ -135,21 +134,10 @@ static int get_partno_from_device(char *partition, dev_t devno)
assert(partition);
if (devno) {
- /* the device exists, read the partition number from /sys
- * TODO: move this to stuff to lib/sysfs.c */
- char path[PATH_MAX];
- FILE *f;
-
- snprintf(path, sizeof(path),
- _PATH_SYS_DEVBLOCK "/%d:%d/partition",
- major(devno), minor(devno));
- f = fopen(path, "r");
- if (f) {
- if (fscanf(f, "%d", &partno) != 1)
- partno = 0;
- fclose(f);
- }
- if (partno)
+ struct sysfs_cxt cxt;
+
+ sysfs_init(&cxt, devno, NULL);
+ if (sysfs_read_int(&cxt, "partition", &partno) >= 0)
return partno;
}