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1 /* Copyright libuv project contributors. All rights reserved.
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2 *
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3 * Permission is hereby granted, free of charge, to any person obtaining a copy
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4 * of this software and associated documentation files (the "Software"), to
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5 * deal in the Software without restriction, including without limitation the
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6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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7 * sell copies of the Software, and to permit persons to whom the Software is
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8 * furnished to do so, subject to the following conditions:
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9 *
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10 * The above copyright notice and this permission notice shall be included in
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11 * all copies or substantial portions of the Software.
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12 *
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13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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19 * IN THE SOFTWARE.
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20 */
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21
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22 #include "uv.h"
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23 #include "internal.h"
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24
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25 #include <sys/types.h>
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26 #include <unistd.h>
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27
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28
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29 static uv_mutex_t process_title_mutex;
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30 static uv_once_t process_title_mutex_once = UV_ONCE_INIT;
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31 static char* process_title;
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32
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33
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34 static void init_process_title_mutex_once(void) {
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35 if (uv_mutex_init(&process_title_mutex))
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36 abort();
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37 }
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38
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39
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40 void uv__process_title_cleanup(void) {
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41 uv_once(&process_title_mutex_once, init_process_title_mutex_once);
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42 uv_mutex_destroy(&process_title_mutex);
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43 }
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44
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45
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46 char** uv_setup_args(int argc, char** argv) {
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47 process_title = argc > 0 ? uv__strdup(argv[0]) : NULL;
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48 return argv;
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49 }
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50
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51
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52 int uv_set_process_title(const char* title) {
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53 char* new_title;
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54
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55 new_title = uv__strdup(title);
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56 if (new_title == NULL)
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57 return UV_ENOMEM;
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58
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59 uv_once(&process_title_mutex_once, init_process_title_mutex_once);
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60 uv_mutex_lock(&process_title_mutex);
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61
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62 uv__free(process_title);
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63 process_title = new_title;
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64 setproctitle("%s", title);
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65
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66 uv_mutex_unlock(&process_title_mutex);
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67
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68 return 0;
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69 }
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70
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71
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72 int uv_get_process_title(char* buffer, size_t size) {
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73 size_t len;
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74
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75 if (buffer == NULL || size == 0)
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76 return UV_EINVAL;
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77
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78 uv_once(&process_title_mutex_once, init_process_title_mutex_once);
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79 uv_mutex_lock(&process_title_mutex);
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80
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81 if (process_title != NULL) {
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82 len = strlen(process_title) + 1;
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83
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84 if (size < len) {
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85 uv_mutex_unlock(&process_title_mutex);
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86 return UV_ENOBUFS;
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87 }
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88
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89 memcpy(buffer, process_title, len);
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90 } else {
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91 len = 0;
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92 }
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93
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94 uv_mutex_unlock(&process_title_mutex);
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95
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96 buffer[len] = '\0';
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97
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98 return 0;
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99 }
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