| Logical links cause EXPAND_PATH() to hang [message #93095] |
Tue, 26 April 2016 11:08  |
wlandsman
Messages: 743
Registered: June 2000
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Senior Member |
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I was trying to add a directory and all subdirectories to my !PATH under IDL 8.5 in Linux, by the usual method of adding a '+' in front of the directory name, e.g. expand_path('+/users/wlandsma/pro')
But expand_path() would just hang, forcing me to kill the IDL session. I eventually tracked the problem to the presence of symbolic links. For example there was a 'pr3' link created with
ln -s /data2/wlandsma/pr3 pr3
Evidently this causes an infinite loop, as IDL keeps trying to expand the logical link. I think this is a bug. My current workaround is to manually add all 10 subdirectories.
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| Re: Logical links cause EXPAND_PATH() to hang [message #93101 is a reply to message #93095] |
Wed, 27 April 2016 20:59  |
zacharyanorman
Messages: 17
Registered: July 2015
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Junior Member |
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I would contact technical support at support@harris.com to see if they can reproduce this problem. Otherwise, you can always recursively search each directory for files and only expand your path with folders.
Here is a function that will recursively find your subdirectories for you (I was curious how this would be done). It might take a few seconds depending on how many subfolders you have and I'm not sure if symbolic links will cause problems or not. Worked for me to recursively search my entire Dropbox folder which contains 998 folders total:
function expand_path_better, dir
compile_opt idl2
;change directories to the first directory
cd, dir, CURRENT = first_dir
dirs = list()
;find the directories
directories = file_search(/TEST_DIRECTORY, COUNT=ndirectories)
;check if we have no directories
if (ndirectories eq 0) then begin
print, 'No directories found, returning!'
return, ''
endif
;remember all of the subdirectories
not_searched = list()
found = list()
for i=0, ndirectories-1 do begin
not_searched.add, dir + path_sep() + directories[i]
found.add, dir + path_sep() + directories[i]
endfor
;recursivey check for new directories by searching the directories that
;we haven't searched
;after we search the directory, forget it and only remember
;the directories that we ahve found
while (n_elements(not_searched) gt 0) do begin
cd, not_searched[0]
;search for subdirectories
subdirs = file_search(/TEST_DIRECTORY, COUNT=ndirectories)
if (ndirectories gt 0) then begin
for i=0, ndirectories-1 do begin
not_searched.add, not_searched[0] + path_sep() + subdirs[i]
found.add, not_searched[0] + path_sep() + subdirs[i]
endfor
endif
;remove not_searched directory from the list
not_searched.remove, 0
endwhile
;convert list to array
found = found.toarray()
;join strings with the path separator for your OS (i.e. ':' or ';')
found = strjoin(found, path_sep(/search_path))
;return to first directory
cd, first_dir
;return the list
return, found
end
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