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annotate scripts/pkg/private/shell.m @ 17535:c12c688a35ed default tip lyh

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Fix warnings
author LYH <lyh.kernel@gmail.com>
date Fri, 27 Sep 2013 17:43:27 +0800
parents 1c89599167a6
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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a46b8b0bd325 doc: Fix the encoding in Søren's name
Jordi Gutiérrez Hermoso <jordigh@octave.org>
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1 ## Copyright (C) 2005-2012 Søren Hauberg
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2 ## Copyright (C) 2010 VZLU Prague, a.s.
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3 ##
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4 ## This file is part of Octave.
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5 ##
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6 ## Octave is free software; you can redistribute it and/or modify it
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7 ## under the terms of the GNU General Public License as published by
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8 ## the Free Software Foundation; either version 3 of the License, or (at
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9 ## your option) any later version.
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10 ##
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11 ## Octave is distributed in the hope that it will be useful, but
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12 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 ## General Public License for more details.
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15 ##
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16 ## You should have received a copy of the GNU General Public License
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17 ## along with Octave; see the file COPYING. If not, see
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18 ## <http://www.gnu.org/licenses/>.
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19
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20 ## Executes a shell command. In the end it calls system() but in case of
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21 ## windows will first check if sh.exe works.
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22 ##
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23 ## If VERBOSE is true, it will prints the output to STDOUT in real time and
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24 ## the second output argument will be an empty string. Otherwise, it will
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25 ## contain the output of the execeuted command.
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26
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27 function [status, output] = shell (cmd, verbose)
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28 persistent have_sh;
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29
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30 cmd = strrep (cmd, "\\", "/");
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31 if (ispc () && ! isunix ())
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32 if (isempty (have_sh))
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33 if (system ('sh.exe -c "exit"'))
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34 have_sh = false;
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35 else
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36 have_sh = true;
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37 endif
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38 endif
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39 if (have_sh)
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40 cmd = ['sh.exe -c "' cmd '"'];
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41 else
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42 error ("pkg: unable to find the command shell.");
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43 endif
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44 endif
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45 ## if verbose, we want to display the output in real time. To do this, we
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46 ## must call system with 1 output argument. But then the variable `output'
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47 ## won't exist. So we initialize it empty. If an error does occur, and we
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48 ## are verbose we will return an empty string but it's all fine since
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49 ## the error message has already been displayed.
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50 output = "";
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51 if (verbose)
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52 [status] = system (cmd);
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53 else
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54 [status, output] = system (cmd);
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55 endif
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56 endfunction
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57