** Also affects: gvfs (Ubuntu Xenial)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1598183
Title:
Operation not permitted while writing to symlinked fuse locations
Status in gvfs:
Confirmed
Status in gvfs package in Ubuntu:
Confirmed
Status in gvfs source package in Xenial:
New
Bug description:
Affected releases:
Ubuntu from 14.10+ (14.04 was working fine)
Steps to reproduce:
1. Setup a gvfs mount (I used smb and sftp shares configured via nautilus).
2. Create a symlink to the fuse-mounted location e.g.
cd ~/Desktop; ln -sf
/run/user/1000/gvfs/smb-share:server=10.0.20.6,share=share1/symlinktest
3. Navigate with nautilus to the symlinked location, open a file available
there with e.g. gedit or libreofficeand try to save it.
Expected result:
File is saved.
Actual result:
An enigmatic error message is displayed
(Cannot handle "file:" locations in write mode - for gedit, or "General
input/output error while accessing <path>" for libreoffice).
The problems started with commit
548ba46c2ba51c4ec5b0dd8442b476f3a2a7000b fuse: Don't g_file_append_to
unless O_APPEND is given. Reverting it makes the issue disappear.
I have rebuild gvfs enabling debugging (#define DEBUG_ENABLED 1) and here is
what I got in ~/vfs.debug:
# accessing via symlink
vfs_open: /smb-share:server=10.0.20.6,share=share1/grouptest/symlinktest/test
open_common: flags=500002
vfs_open: -> Operation not supported
# accessing via /run/user/(...)
vfs_open: /smb-share:server=10.0.20.6,share=share1/grouptest/symlinktest/test
open_common: flags=1100000
setup_input_stream: have stream
setup_input_stream: doing read
vfs_open: -> Success
For reasons beyond my understanding the flags are different while
accessing the file via the default gvfs-mountpoint causing the
execusion to skip the modified section of client/gvfsdfusedaemon.c
(returning -ENOTSUP).
I am attaching the full vfs.debug created.
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