From mboxrd@z Thu Jan 1 00:00:00 1970 From: Namjae Jeon Subject: [PATCH] f2fs-tools: mkfs: fix to avoid format of device when already mounted Date: Sun, 31 Mar 2013 11:51:29 +0900 Message-ID: <1364698289-22182-1-git-send-email-linkinjeon@gmail.com> Cc: linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Namjae Jeon , Namjae Jeon , Amit Sahrawat To: jaegeuk.kim@samsung.com Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org From: Namjae Jeon In case of embedded devices, where /etc/ is mounted as 'read-only'. We donot have the /etc/mtab file. So, checking if the device is already mounted from this file is not sufficient. Try to read /proc/mounts in case of failure from /etc/mtab. Issue logs: /dev/sdb4 /mnt vfat rw,relatime,fmask=0022,dmask=0022,codepage=cp437, iocharset=ascii,errors=remount-ro 0 0 Here device - sb4 is already mounted. But, when trying to format using mkfs.f2fs F2FS-tools: Ver: 1.1.0 (2013-01-14) Info: sector size = 512 Info: total sectors = 13108784 (in 512bytes) WARN: Align start sector number in a unit of pages i.e., start sector: 2542124, ofs:4 (sectors per page: 8) Info: zone aligned segment0 blkaddr: 186 Info: This device doesn't support TRIM Info: format successful After Change: F2FS-tools: Ver: 1.1.0 (2013-01-14) Error: /dev/sdb4 is already mounted Signed-off-by: Namjae Jeon Signed-off-by: Amit Sahrawat --- lib/libf2fs.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/lib/libf2fs.c b/lib/libf2fs.c index 37ed147..d228492 100644 --- a/lib/libf2fs.c +++ b/lib/libf2fs.c @@ -152,8 +152,13 @@ int f2fs_dev_is_mounted(struct f2fs_configuration *c) struct mntent *mnt = NULL; file = setmntent(MOUNTED, "r"); - if (file == NULL) - return 0; + if (file == NULL) { + /* if failed due to /etc/mtab file not present + try with /proc/mounts */ + file = setmntent("/proc/mounts", "r"); + if (file == NULL) + return 0; + } while (1) { mnt = getmntent(file); -- 1.7.9.5