[GRASS-dev] [GRASS GIS] #2509: d.mon output overwrite

[GRASS GIS]

#2509: d.mon output overwrite
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 Reporter:  martinl      |       Owner:  martinl    
     Type:  defect       |      Status:  assigned   
 Priority:  normal       |   Milestone:  7.0.0      
Component:  Display      |     Version:  unspecified
 Keywords:  d.mon        |    Platform:  Unspecified
      Cpu:  Unspecified  |  
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Comment(by glynn):

 Replying to [comment:26 wenzeslaus]:

 > Passing commands as one string is probably necessary in some cases (e.g.
 when they are stored into a file or when a module would take more
 different commands as input) but if it can be avoided, it should be
 avoided I think.

 When a d.* command is redirected to another program, its argument list
 needs to be passed as-is.

 If you need to store a "command" in a file, then you need to separate the
 arguments. There are two options here:

  1. Use a NUL byte as the argument separator. On both Unix and Windows,
 any byte except NUL can occur within an argument. NUL cannot occur within
 an argument, but can occur within a file. However, if the command is only
 one item within the file, then you also need some mechanism to indicate
 the end of the command, which leaves the second option:

  2. Use some other byte as the separator and escape or quote argument
 values so that occurrences of the separator within an argument can be
 distinguished from argument separators.

 Ignoring the situation where the separator (or a character used for
 escaping or quoting) occurs within an argument is not a "solution". Which
 is why G_recreate_command() can't be used here.

-- 
Ticket URL: <http://trac.osgeo.org/grass/ticket/2509#comment:29>
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