[GRASS-dev] [GRASS GIS] #2418: t.unregister: "maps"-parameter limited to ca. 5000 maps

[GRASS GIS]

#2418: t.unregister: "maps"-parameter limited to ca. 5000 maps
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 Reporter:  sbl          |       Owner:  grass-dev@…              
     Type:  defect       |      Status:  new                      
 Priority:  normal       |   Milestone:  7.1.0                    
Component:  Temporal     |     Version:  unspecified              
 Keywords:               |    Platform:  Linux                    
      Cpu:  Unspecified  |  
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Comment(by huhabla):

 Replying to [ticket:2418 sbl]:
 > In t.unregister the "maps" parameter seems to be limited to ca. 5000
 maps.
 >
 > I have a strds with ca. 20k raster maps and tried to remove all by
 piping the output from t.rast.list to the "maps" parameter in
 t.unregister. After some testing I found out that the "maps" parameter
 works fine with 5000 maps, but with 6000 maps and more I got an "Argument
 list to long" error.

 This is not a defect, its the os specific limitation of argument lists[1].

 > However, unregistering of all 20k maps worked fine when output from
 t.rast.list was stored in a file and then t.unregister`s "file" parameter
 used.

 The reason for the input file option is the os limit of command line
 arguments. So you did exactly the right thing by using it in case of 20k
 maps.

 > BTW, maybe a flag for unregistering all maps in a stds would be useful?

 Sounds useful indeed, feel free to add it to t.unregister. :)


 [1] https://wiki.debian.org/CommonErrorMessages/ArgumentListTooLong

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Ticket URL: <https://trac.osgeo.org/grass/ticket/2418#comment:1>
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