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update Octave Project Developers copyright for the new year In files that have the "Octave Project Developers" copyright notice, update for 2020.
author John W. Eaton <jwe@octave.org>
date Mon, 06 Jan 2020 22:29:51 -0500
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1 /*
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2
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3 Copyright (C) 2019-2020 The Octave Project Developers
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4
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5 See the file COPYRIGHT.md in the top-level directory of this distribution
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6 or <https://octave.org/COPYRIGHT.html/>.
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7
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8
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9 This file is part of Octave.
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10
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11 Octave is free software: you can redistribute it and/or modify it
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12 under the terms of the GNU General Public License as published by
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13 the Free Software Foundation, either version 3 of the License, or
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14 (at your option) any later version.
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15
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16 Octave is distributed in the hope that it will be useful, but
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17 WITHOUT ANY WARRANTY; without even the implied warranty of
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18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 GNU General Public License for more details.
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20
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21 You should have received a copy of the GNU General Public License
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22 along with Octave; see the file COPYING. If not, see
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23 <https://www.gnu.org/licenses/>.
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24
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25 */
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26
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27 #include <iostream>
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28 #include <sstream>
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29
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30 #include "oct-process.h"
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31 #include "procstream.h"
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32 #include "sysdep.h"
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33 #include "oct-syscalls.h"
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34
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35 namespace octave
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36 {
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37 OCTINTERP_API
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38 process_execution_result
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39 process_execution_result::of_success (int exit_status,
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40 const std::string& stdout_output)
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41 {
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42 return process_execution_result (0, exit_status, stdout_output, "");
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43 }
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44
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45 OCTINTERP_API
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46 process_execution_result
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47 process_execution_result::of_error (int status, const std::string& err_msg)
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48 {
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49 return process_execution_result (status, -1, "", err_msg);
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50 }
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51
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52 // Execute a shell command, returning results as a C++ object
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53 OCTINTERP_API
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54 process_execution_result
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55 run_command_and_return_output (const std::string& cmd_str)
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56 {
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57 iprocstream cmd (cmd_str.c_str ());
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58
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59 if (! cmd)
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60 {
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61 std::string msg = "unable to start subprocess for '" + cmd_str + "'";
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62
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63 return process_execution_result::of_error (-1, msg);
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64 }
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65
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66 std::ostringstream output_buf;
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67
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68 char ch;
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69
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70 for (;;)
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71 {
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72 if (cmd.get (ch))
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73 output_buf.put (ch);
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74 else
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75 {
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76 if (! cmd.eof () && errno == EAGAIN)
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77 cmd.clear ();
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78 else
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79 break;
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80 }
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81 }
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82
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83 int cmd_status = cmd.close ();
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84
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85 if (sys::wifexited (cmd_status))
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86 cmd_status = sys::wexitstatus (cmd_status);
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87 else
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88 cmd_status = 127;
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89
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90 return process_execution_result::of_success (cmd_status, output_buf.str ());
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91 }
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92 }