Public bug reported:

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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** Affects: gvfs (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: regression-release sts

** Tags added: sts

** Tags added: regression-release

** Description changed:

- Platform:
- Ubuntu from 14.10+
+ 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.
  Collapse All Comments
  Expand All Comments
  Add Comment

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https://bugs.launchpad.net/bugs/1598183

Title:
  Operation not permitted while writing to symlinked fuse locations

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