Thanks Josua Mayer.
Devname and partname both are different. Devname is holding the device node(ex.
mmcblkXpY) and given name(or partname) is the partition name(ex. rootfs or
rootfs_data).
For below uevent sysfs entries, it tries to populate the device
node(mmcblkXpY) in devname variable and tries to match the given name with the
PARTNAME(buf will have this value("PARTNAME=rootfs_data") at n'th iteration).
If it is found then the loop will break, and we will get the given name's
device node(/dev/mmcblkXpY) which will be mounted later.
Example:
root@OpenWrt:/# cat /sys/block/mmcblk0/mmcblk0p3/uevent
MAJOR=179
MINOR=3
DEVNAME=mmcblk0p3 <-- device node: /dev/mmcblk0p3
DEVTYPE=partition
PARTN=3
PARTNAME=rootfs_data
This is required, because the emmc card may have multiple partitions too. So
our aim is to get the device node from the given name's uevent file.
Thanks,
Ram
-----Original Message-----
From: openwrt-devel [mailto:[email protected]] On Behalf
Of [email protected]
Sent: Thursday, April 28, 2016 11:50 PM
To: [email protected]
Cc: Josua Mayer <[email protected]>
Subject: [OpenWrt-Devel] [PATCH v2 2/3] ext4_part_match: fix bug that prevented
matching names
From: Josua Mayer <[email protected]>
Actually use the populated devname variable to compare against given name,
instead of the buf variable, which incidentally contains either:
MAJOR=xyz, MINOR=x, or DEVTYPE=partition, none of which ever match a name.
Signed-off-by: Josua Mayer <[email protected]>
---
libfstools/ext4.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libfstools/ext4.c b/libfstools/ext4.c index f648aa8..b9401c3 100644
--- a/libfstools/ext4.c
+++ b/libfstools/ext4.c
@@ -78,7 +78,7 @@ ext4_part_match(char *dev, char *name, char *filename)
continue;
}
/* Match partition name */
- if (strstr(buf, name)) {
+ if (strstr(devname, name)) {
ret = 0;
break;
}
--
2.6.6
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