BadVPN – Blame information for rev 1
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1 | office | 1 | /** |
2 | * @file stdbuf_cmdline.h |
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3 | * @author Ambroz Bizjak <ambrop7@gmail.com> |
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4 | * |
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5 | * @section LICENSE |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions are met: |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * 2. Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * 3. Neither the name of the author nor the |
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15 | * names of its contributors may be used to endorse or promote products |
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16 | * derived from this software without specific prior written permission. |
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17 | * |
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18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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20 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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21 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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22 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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23 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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24 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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27 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | * |
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29 | * @section DESCRIPTION |
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30 | * |
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31 | * Builds command line for running a program via stdbuf. |
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32 | */ |
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33 | |||
34 | #ifndef BADVPN_STDBUF_CMDLINE_H |
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35 | #define BADVPN_STDBUF_CMDLINE_H |
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36 | |||
37 | #include <string.h> |
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38 | |||
39 | #include <misc/debug.h> |
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40 | #include <misc/cmdline.h> |
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41 | #include <misc/balloc.h> |
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42 | |||
43 | /** |
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44 | * Builds the initial part of command line for calling a program via stdbuf |
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45 | * with standard output buffering set to line-buffered. |
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46 | * |
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47 | * @param out {@link CmdLine} to append the result to. Note than on failure, only |
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48 | * some part of the cmdline may have been appended. |
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49 | * @param stdbuf_exec full path to stdbuf executable |
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50 | * @param exec path to the executable. Must not contain nulls. |
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51 | * @param exec_len number of characters in exec |
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52 | * @return 1 on success, 0 on failure |
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53 | */ |
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54 | static int build_stdbuf_cmdline (CmdLine *out, const char *stdbuf_exec, const char *exec, size_t exec_len) WARN_UNUSED; |
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55 | |||
56 | int build_stdbuf_cmdline (CmdLine *out, const char *stdbuf_exec, const char *exec, size_t exec_len) |
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57 | { |
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58 | ASSERT(!memchr(exec, '\0', exec_len)) |
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59 | |||
60 | if (!CmdLine_AppendMulti(out, 3, stdbuf_exec, "-o", "L")) { |
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61 | goto fail1; |
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62 | } |
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63 | |||
64 | if (exec[0] == '/') { |
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65 | if (!CmdLine_AppendNoNull(out, exec, exec_len)) { |
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66 | goto fail1; |
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67 | } |
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68 | } else { |
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69 | bsize_t size = bsize_add(bsize_fromsize(exec_len), bsize_fromsize(3)); |
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70 | char *real_exec = BAllocSize(size); |
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71 | if (!real_exec) { |
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72 | goto fail1; |
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73 | } |
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74 | |||
75 | memcpy(real_exec, "./", 2); |
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76 | memcpy(real_exec + 2, exec, exec_len); |
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77 | real_exec[2 + exec_len] = '\0'; |
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78 | |||
79 | int res = CmdLine_Append(out, real_exec); |
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80 | free(real_exec); |
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81 | if (!res) { |
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82 | goto fail1; |
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83 | } |
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84 | } |
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85 | |||
86 | return 1; |
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87 | |||
88 | fail1: |
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89 | return 0; |
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90 | } |
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91 | |||
92 | #endif |