Re: [Plplot-devel] plbop() crash caused by moronic tmpfile() implementation in M$ W2000

[<jc...@fe...>]

On Tuesday 14 January 2003 17:55, Alan W. Irwin wrote:
| On Tue, 14 Jan 2003, Joachim Wuttke wrote:
| > Observation:
| >    Load file foo.dat from D:\path, plbop(), plot, everything works.
| >    Load same file from V:\path, plbop(), application crashes:
| > "access violation". The only difference: drive V is read-only.
| > Explication:
| >    plbop() calls tmpfile(), which comes with libc. This is a posix
| > routine that creates a temporary file. It looks as if the W2k
| > implementation attempts to create the temporary file in just the
| > last directory the application was in contact with.
| > Proposal:
| >    If I see correctly, in the whole of plplot there is only one
| > call to tmpfile(). Therefore we could easily either replace
| > tmpfile() by an explicit fopen, or introduce a preprocessor switch
| > and replaced tmpfile for Windows only.
|
| Joachim, I can find no reference to tmpfile in CVS (to be released

drivers/plbuf.c

at plbuf_bop()  pls->plbufFile =3D tmpfile(); the file is created,
at plbuf_tidy() fclose(pls->plbufFile); the file is removed.

| Saturday as plplot-5.2.0) under src/*.c and certainly not in plbop.=20
| Could you please have a look at the CVS version (a) to make sure this
| specific problem is not occurring, and (b) for general testing before
| the release? Directions for anonymous CVS access are given at
| http://sourceforge.net/cvs/?group_id=3D2915.
|
| Alan
|
| __________________________
| Alan W. Irwin
| email: ir...@be...
| phone: 250-727-2902
|
| Astronomical research affiliation with Department of Physics and
| Astronomy, University of Victoria (astrowww.phys.uvic.ca).
|
| Programming affiliations with the Canadian Centre for Climate
| Modelling and Analysis (www.cccma.bc.ec.gc.ca) and the PLplot
| scientific plotting software package (plplot.org).
|
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