[GRASS-dev] [GRASS GIS] #2447: G_legal_filename: Special characters allowed in filenames

GRASS GIS trac at osgeo.org
Sat Oct 11 04:23:43 PDT 2014

#2447: G_legal_filename: Special characters allowed in filenames
 Reporter:  hcho              |       Owner:  grass-dev@…              
     Type:  defect            |      Status:  new                      
 Priority:  normal            |   Milestone:  7.1.0                    
Component:  LibGIS            |     Version:  svn-trunk                
 Keywords:  G_legal_filename  |    Platform:  All                      
      Cpu:  All               |  

Comment(by glynn):

 Replying to [ticket:2447 hcho]:
 > Currently, G_legal_filename is not filtering out some special characters
 including tab, newline, {, |, }, etc.

 All control characters, including tab and newline are rejected by
 ... *s <= ' '

 Braces and vertical bar aren't considered invalid.

 Which characters are invalid is somewhat arbitrary, although it has to
 include those which have a specific meaning to the parser (equals, comma),
 to the OS (slash) or within map names (at). Apart from those, space,
 single quote, double quote, asterisk, control characters and 8-bit
 characters are considered invalid, although there's no fundamental reason
 for these (some of these may have been added to avoid issues with code
 which used system() and/or popen(), but those functions should have been
 been eliminated in GRASS 7).

 The set of invalid characters hasn't been updated to include all of those
 which are invalid on Windows, specifically backslash, colon, question
 mark, less than, greater than, vertical bar (asterisk, double quote and
 slash are also invalid but are already rejected). It's unlikely that any
 of these are likely to be used in existing data sets, with the possible
 exception of colon.

Ticket URL: <http://trac.osgeo.org/grass/ticket/2447#comment:1>
GRASS GIS <http://grass.osgeo.org>

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