open datasource in read-only mode

[qgib]

Author Name: Martin Landa (Martin Landa)
Original Redmine Issue: 14458
Affected QGIS version: 2.8.7
Redmine category:data_provider/ogr

---

Hi,

QGIS has some problems when opening datasources in read-only mode (eg. Shapefiles located in directory where the user has only read permission). When you open single file it works, but in log window appears

OGR[3] chyba 4: Unable to open /mnt/home/pc07/Repository/gismentors/shp/osm/pozarni_stanice.shp or /mnt/home/pc07/Repository/gismentors/shp/osm/pozarni_stanice.SHP.

The real problem starts when you try read all layers from directory. Then you get error:

Invalid Data Source: /mnt/home/pc07/Repository/gismentors/shp/ochrana_uzemi is not a valid or recognized data source

and nothing is open.

[qgib]

Author Name: Maximilian Krambach (Maximilian Krambach)

---

When opening a directory with read-only shapes in it, I get I get a

This message is created by the OGR provider, not QGIS.

https://github.com/qgis/QGIS/blob/5bb25d8917dc0d494ae46c035f8e019f448c60fb/src/providers/ogr/qgsogrprovider.cpp#l2727
QgsOgrProvider::open() handles the opening of a shapefile by checking if the OGROpen (... ,true) results in a valid layer (here the "unable to open" message is generated by OGR), and if not, proceeds with OGROpen (....,false). --> Layer is opened in read-only mode

I think, if opened as a directory, somewhere in the code it is tried with just OGROpen(....,true), and that fails, resulting in the layers affected to not open at all.

[qgib]

Author Name: Giovanni Manghi (@gioman)

---

• fixed_version_id was changed from 2.16 to Version 2.16

[qgib]

Author Name: Nyall Dawson (@nyalldawson)

---

I can't reproduce - What method are you using to add all files from a directory?

---

• status_id was changed from Open to Feedback

[qgib]

Author Name: Giovanni Manghi (@gioman)

---

closing for lack of feedback, please reopen if necessary.

---

• resolution was changed from to not reproducable
• status_id was changed from Feedback to Closed