Mercurial > octave
annotate libinterp/corefcn/oct-process.cc @ 29359:7854d5752dd2
maint: merge stable to default.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 10 Feb 2021 10:10:40 -0500 |
parents | 665c9ed14c97 0a5b15007766 |
children | 796f54d4ddbf |
rev | line source |
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1 //////////////////////////////////////////////////////////////////////// |
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2 // |
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3 // Copyright (C) 2019-2021 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 |
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6 // distribution or <https://octave.org/copyright/>. |
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7 // |
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8 // This file is part of Octave. |
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9 // |
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10 // Octave is free software: you can redistribute it and/or modify it |
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11 // under the terms of the GNU General Public License as published by |
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12 // the Free Software Foundation, either version 3 of the License, or |
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13 // (at your option) any later version. |
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14 // |
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15 // Octave is distributed in the hope that it will be useful, but |
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 // GNU General Public License for more details. |
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19 // |
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20 // You should have received a copy of the GNU General Public License |
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21 // along with Octave; see the file COPYING. If not, see |
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22 // <https://www.gnu.org/licenses/>. |
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23 // |
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24 //////////////////////////////////////////////////////////////////////// |
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25 |
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26 #include <iostream> |
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27 #include <sstream> |
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28 |
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29 #include "oct-process.h" |
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30 #include "procstream.h" |
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31 #include "sysdep.h" |
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32 #include "oct-syscalls.h" |
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33 |
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34 namespace octave |
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35 { |
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36 process_execution_result |
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37 process_execution_result::of_success (int exit_status, |
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38 const std::string& stdout_output) |
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39 { |
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40 return process_execution_result (0, exit_status, stdout_output, ""); |
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41 } |
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42 |
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43 process_execution_result |
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44 process_execution_result::of_error (int status, const std::string& err_msg) |
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45 { |
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46 return process_execution_result (status, -1, "", err_msg); |
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47 } |
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48 |
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49 // Execute a shell command, returning results as a C++ object |
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50 process_execution_result |
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51 run_command_and_return_output (const std::string& cmd_str) |
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52 { |
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53 iprocstream cmd (cmd_str.c_str ()); |
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54 |
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55 if (! cmd) |
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56 { |
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57 std::string msg = "unable to start subprocess for '" + cmd_str + "'"; |
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58 |
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59 return process_execution_result::of_error (-1, msg); |
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60 } |
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61 |
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62 std::ostringstream output_buf; |
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63 |
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64 char ch; |
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65 |
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66 for (;;) |
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67 { |
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68 if (cmd.get (ch)) |
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69 output_buf.put (ch); |
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70 else |
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71 { |
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72 if (! cmd.eof () && errno == EAGAIN) |
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73 cmd.clear (); |
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74 else |
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75 break; |
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76 } |
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77 } |
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78 |
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79 int cmd_status = cmd.close (); |
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80 |
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81 if (sys::wifexited (cmd_status)) |
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82 cmd_status = sys::wexitstatus (cmd_status); |
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83 else |
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84 cmd_status = 127; |
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85 |
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86 return process_execution_result::of_success (cmd_status, output_buf.str ()); |
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87 } |
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88 } |