libsmartcols ASCII art problem

[martinpitt]

Forwarding from https://launchpad.net/bugs/1406133:

The libsmartcols component used by findmnt to draw the filesystem tree is smart enough to wrap lines in case the output doesn’t fit into the screen. However, it fails to draw the lines correctly in this case. Attached patch fixes the problem. Someone more knowledgeable in libsmartcols internals might want to change the buffer size from an arbitrary 1024 to something taken from actual data, the best way to do that eludes me.

Sample of incorrect output:

├─/boot /dev/sda1 ext3 rw,relatime,data=ordered
├─/usr /dev/mapper/vgshadow-ubuntu_usr
                                                ext4 rw,noatime,data=ordered
├─/var /dev/mapper/vgshadow-ubuntu_var
                                                ext4 rw,noatime,data=ordered
├─/home /dev/mapper/vgshadow-home
                                                ext4 rw,noatime,data=ordered
└─/srv /dev/mapper/vgshadow-srv
                                                reiserfs rw,noatime,notail

Patch adds missing vertical lines at any level necessary.

The patch is here: https://launchpadlibrarian.net/193614209/libsmartcols-art-fix.diff

[martinpitt]

The bug report/patch is by Roman Odaisky (https://launchpad.net/~rdaysky), but he did not provide an email address.

[karelzak]

Should be fixed now.