Nikos Alexandris <[email protected]> writes: > Rainer MK wrote: >> >> I am a bit irritated, ut maybe I don't dee the reasoning behind this:' > >> >> ,---- >> >> | RASS 7.0.svn (grass):~ > g.copy rast=MASK,tmp >> >> | WARNING: <tmp> already exists >> >> | [Raster MASK present] >> >> | GRASS 7.0.svn (grass):~ > >> >> `---- > >> >> If the layer already exists, shouldn't the command give actually an >> >> error and not only a warning? > >> >> A warning implies for me that the command worked, but maybe something >> >> unexpected could have happened (or happened) - but this one clearly did >> >> not work, as the layer has not been copied? > > Glynn Clements: >> > In GRASS, errors are fatal; the program will be terminated as soon as >> > the error message has been printed. > > Rainer MK: >> Exactly - if e.g. in r.mapcalc an invalid expression is entered, >> r.mapcalc issues the error message and quits. > >> > Each of g.copy's options accept an arbitray number of >> > source+destination pairs, and the various options aren't mutually >> > exclusive (e.g. a single invocation can copy both raster and vector >> > maps). > >> True. > >> > If it can't perform a particular copy for any reason, it generates a >> > warning then moves on to the next item. > >> True - but this does not answer my question. But I looked at cp in bash, >> and it behaves in the same way. >> So I think I have to live with this. > > Just sharing my thoughts about: Imagine copying 1000 maps. And one is meant > to fail, say the 1st one of them. You wouldn't, probably, like the copy > process to be interrupted just for one map that failed. Right?
Depends: when using in a script, I would like it to fail, as the following commands might give wrong resuls as they would be based on the previous map and not the copied one. Also, in a script this could mean that previous commands did not clean their temporary files properly - other cause for an interruption of the script. When doing it from the command prompt, I would say: just tell me which ones failed - correct. SO the best would be a flag which says "error on map exists". Cheers, Rainer > > Greets, Nikos -- Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany) Centre of Excellence for Invasion Biology Stellenbosch University South Africa Tel : +33 - (0)9 53 10 27 44 Cell: +33 - (0)6 85 62 59 98 Fax : +33 - (0)9 58 10 27 44 Fax (D): +49 - (0)3 21 21 25 22 44 email: [email protected] Skype: RMkrug _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
