Possible problem with ctags

[Robert Mecklenburg]

I'm getting a strange error when I run ctags:

  5 osaka:cimsoft$ /bin/ctags -e --recurse
  ctags: cannot open temporary file : No such file or directory
  [Exit 1]

If I run this under strace I get:

   36 2364446 [main] ctags 7320 path_conv::check: root_dir(C:\), this->path(C:\usr\cygwin\mnt\c\DOCUME~1\liddins\LOCALS~1\Temp), set_has_acls(8)
   47 2364493 [main] ctags 7320 dtable::build_fhandler: fd -1, fh 0x615F0F50
   32 2364525 [main] ctags 7320 stat_worker: (/mnt/c/DOCUME~1/liddins/LOCALS~1/Temp, 0x22FA20, 0, 0x22F680), file_attributes -1
   42 2364567 [main] ctags 7320 fhandler_base::open: (C:\usr\cygwin\mnt\c\DOCUME~1\liddins\LOCALS~1\Temp, 0x110000) query_open 0
   71 2364638 [main] ctags 7320 seterrno_from_win_error: /netrel/src/cygwin-1.3.22-1/winsup/cygwin/fhandler.cc:472 windows error 3
   37 2364675 [main] ctags 7320 geterrno_from_win_error: windows error 3 == errno 2
   42 2364717 [main] ctags 7320 fhandler_base::open: 0 = fhandler_base::open (C:\usr\cygwin\mnt\c\DOCUME~1\liddins\LOCALS~1\Temp, 0x110000)
   35 2364752 [main] ctags 7320 fhandler_disk_file::open: 0 = fhandler_disk_file::open (C:\usr\cygwin\mnt\c\DOCUME~1\liddins\LOCALS~1\Temp, 0x110000)
   33 2364785 [main] ctags 7320 fhandler_base::open: (C:\usr\cygwin\mnt\c\DOCUME~1\liddins\LOCALS~1\Temp, 0x110000) query_open 1
   65 2364850 [main] ctags 7320 seterrno_from_win_error: /netrel/src/cygwin-1.3.22-1/winsup/cygwin/fhandler.cc:472 windows error 3
   35 2364885 [main] ctags 7320 geterrno_from_win_error: windows error 3 == errno 2
   32 2364917 [main] ctags 7320 fhandler_base::open: 0 = fhandler_base::open (C:\usr\cygwin\mnt\c\DOCUME~1\liddins\LOCALS~1\Temp, 0x110000)
   33 2364950 [main] ctags 7320 fhandler_disk_file::open: 0 = fhandler_disk_file::open (C:\usr\cygwin\mnt\c\DOCUME~1\liddins\LOCALS~1\Temp, 0x110000)
   33 2364983 [main] ctags 7320 fhandler_disk_file::fstat_by_name: already determined that pc does not exist
   34 2365017 [main] ctags 7320 stat_worker: -1 = (/mnt/c/DOCUME~1/liddins/LOCALS~1/Temp, 0x22FA20)
   52 2365069 [main] ctags 7320 writev: writev (2, 0x22E120, 1)
   34 2365103 [main] ctags 7320 fhandler_base::write: binary write
ctags:    43 2365146 [main] ctags 7320 fhandler_base::write: 7 = write (0x22E1B0, 7)
   32 2365178 [main] ctags 7320 writev: 7 = write (2, 0x22E120, 1), errno 2
   37 2365215 [main] ctags 7320 writev: writev (2, 0x22E140, 1)
   32 2365247 [main] ctags 7320 fhandler_base::write: binary write
cannot open temporary file   40 2365287 [main] ctags 7320 fhandler_base::write: 26 = write (0x22E1D0, 26)
   31 2365318 [main] ctags 7320 writev: 26 = write (2, 0x22E140, 1), errno 2
   51 2365369 [main] ctags 7320 writev: writev (2, 0x22E120, 1)
   33 2365402 [main] ctags 7320 fhandler_base::write: binary write
 : No such file or directory   39 2365441 [main] ctags 7320 fhandler_base::write: 28 = write (0x22E1B0, 28)
   32 2365473 [main] ctags 7320 writev: 28 = write (2, 0x22E120, 1), errno 2
   45 2365518 [main] ctags 7320 writev: writev (2, 0x22FA50, 1)
   33 2365551 [main] ctags 7320 fhandler_base::write: binary write

   39 2365590 [main] ctags 7320 fhandler_base::write: 1 = write (0x610CB3CF, 1)
   32 2365622 [main] ctags 7320 writev: 1 = write (2, 0x22FA50, 1), errno 2
   47 2365669 [main] ctags 7320 do_exit: do_exit (1)

I have no idea where the \mnt\c\DOCUME~1\liddins\LOCALS~1\Temp came
from.  "liddins" is not a name which occurs anywhere on my machine,
our local subnet or the ctags source.  In fact, a google on liddins
returns nothing (kind of cool, that).

After poking around some more I've found that setting the TMPDIR
environment variable to $TMP solves the problem.  Scanning the source
I see that TMPDIR is used as a configuration option to specify a
default temporary directory.  A strings on the ctags binary yeilds:

  12 osaka:cimsoft$ strings /bin/ctags.exe | grep liddins
  /mnt/c/DOCUME~1/liddins/LOCALS~1/Temp

My conclusion: Maybe the most recent release of ctags has a
compiled-in default directory of .../liddins/... and that this
directory is used if the TMPDIR environment variable is otherwise
undefined.

Comments?

Thanks,
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Robert

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