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[Octave-bug-tracker] [bug #41836] plot command: temporaray file names no
From: |
anonymous |
Subject: |
[Octave-bug-tracker] [bug #41836] plot command: temporaray file names not unique |
Date: |
Tue, 11 Mar 2014 17:16:13 +0000 |
User-agent: |
Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0) |
URL:
<http://savannah.gnu.org/bugs/?41836>
Summary: plot command: temporaray file names not unique
Project: GNU Octave
Submitted by: None
Submitted on: Di 11 Mär 2014 17:16:11 UTC
Category: None
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Feature Request
Status: None
Assigned to: None
Originator Name: Martin Hepperle
Originator Email: address@hidden
Open/Closed: Open
Discussion Lock: Any
Release: 3.6.4
Operating System: Microsoft Windows
_______________________________________________________
Details:
Currently I am running several shell scripts at the same time in parallel on a
multi-core system. These also call octave to create some plots.
When it comes to plotting to a bitmap file the results get mixed up.
The reason is that the plot command creates temporary files whose names are
just numbered per session (1, 2, ...)
If two octave sessions are running at the same time, chances are that they
want to use the same file which fails or that a later run overwrites the
temporary plot file.
To repair this, the temporary file names would have to be unique. At least to
a high degree of probability, e.g. using the rand() function.
A better approach would be to create a file name, test for its existence and
if so, increment a counter, otherwise create the file to "reserve" it.
The current code uses tmpnam() which should be replaced (probably tmpnam ()
should be modified to create at least a pseudo unique file name.
The following example shows the temporary file name (oct-7.eps):
octave:1> x = linspace(0,3,50);
octave:2> y = sin(x);
octave:2> plot(x,y);
octave:3> print('test.png','-dpng','-debug');
Ghostscript command:
'"D:\Program_Files_(x86)\Octave3.6.1_gcc4.6.2\gs\gs9.04\bin/gswin32c.exe"
-dQUIET -dNOPAUSE -dBATCH -dSAFER -sDEVICE=png16m -dTextAlphaBits
=4 -dGraphicsAlphaBits=4 -r150x150 -dEPSCrop -sOutputFile=wbd.png
C:\Users\ea55\AppData\Local\Temp\oct-3.eps'
gnuplot-pipeline:
'"D:\Program_Files_(x86)\Octave3.6.1_gcc4.6.2\gs\gs9.04\bin/gswin32c.exe"
-dQUIET -dNOPAUSE -dBATCH -dSAFER -sDEVICE=png16m -dTextAlphaBits=4
-dGraphicsAlphaBits=4 -r150x150 -dEPSCrop -sOutputFile=wbd.png
C:\Users\ea55\AppData\Local\Temp\oct-7.eps & del
C:\Users\ea55\AppData\Local\Temp\oct-3.eps'
_______________________________________________________
Reply to this item at:
<http://savannah.gnu.org/bugs/?41836>
_______________________________________________
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