1 /* Copyright libuv project contributors. All rights reserved. 2 * 3 * Permission is hereby granted, free of charge, to any person obtaining a copy 4 * of this software and associated documentation files (the "Software"), to 5 * deal in the Software without restriction, including without limitation the 6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 7 * sell copies of the Software, and to permit persons to whom the Software is 8 * furnished to do so, subject to the following conditions: 9 * 10 * The above copyright notice and this permission notice shall be included in 11 * all copies or substantial portions of the Software. 12 * 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 19 * IN THE SOFTWARE. 20 */ 21 22 #include "uv.h" 23 #include "internal.h" 24 25 #include <sys/types.h> 26 #include <unistd.h> 27 28 29 static uv_mutex_t process_title_mutex; 30 static uv_once_t process_title_mutex_once = UV_ONCE_INIT; 31 static char* process_title; 32 33 34 static void init_process_title_mutex_once(void) { 35 if (uv_mutex_init(&process_title_mutex)) 36 abort(); 37 } 38 39 40 void uv__process_title_cleanup(void) { 41 /* TODO(bnoordhuis) uv_mutex_destroy(&process_title_mutex) 42 * and reset process_title_mutex_once? 43 */ 44 } 45 46 47 char** uv_setup_args(int argc, char** argv) { 48 process_title = argc > 0 ? uv__strdup(argv[0]) : NULL; 49 return argv; 50 } 51 52 53 int uv_set_process_title(const char* title) { 54 char* new_title; 55 56 new_title = uv__strdup(title); 57 if (new_title == NULL) 58 return UV_ENOMEM; 59 60 uv_once(&process_title_mutex_once, init_process_title_mutex_once); 61 uv_mutex_lock(&process_title_mutex); 62 63 uv__free(process_title); 64 process_title = new_title; 65 setproctitle("%s", title); 66 67 uv_mutex_unlock(&process_title_mutex); 68 69 return 0; 70 } 71 72 73 int uv_get_process_title(char* buffer, size_t size) { 74 size_t len; 75 76 if (buffer == NULL || size == 0) 77 return UV_EINVAL; 78 79 uv_once(&process_title_mutex_once, init_process_title_mutex_once); 80 uv_mutex_lock(&process_title_mutex); 81 82 if (process_title != NULL) { 83 len = strlen(process_title) + 1; 84 85 if (size < len) { 86 uv_mutex_unlock(&process_title_mutex); 87 return UV_ENOBUFS; 88 } 89 90 memcpy(buffer, process_title, len); 91 } else { 92 len = 0; 93 } 94 95 uv_mutex_unlock(&process_title_mutex); 96 97 buffer[len] = '\0'; 98 99 return 0; 100 } 101