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 uv_once(&process_title_mutex_once, init_process_title_mutex_once); 42 uv_mutex_destroy(&process_title_mutex); 43 } 44 45 46 char** uv_setup_args(int argc, char** argv) { 47 process_title = argc > 0 ? uv__strdup(argv[0]) : NULL; 48 return argv; 49 } 50 51 52 int uv_set_process_title(const char* title) { 53 char* new_title; 54 55 new_title = uv__strdup(title); 56 if (new_title == NULL) 57 return UV_ENOMEM; 58 59 uv_once(&process_title_mutex_once, init_process_title_mutex_once); 60 uv_mutex_lock(&process_title_mutex); 61 62 uv__free(process_title); 63 process_title = new_title; 64 setproctitle("%s", title); 65 66 uv_mutex_unlock(&process_title_mutex); 67 68 return 0; 69 } 70 71 72 int uv_get_process_title(char* buffer, size_t size) { 73 size_t len; 74 75 if (buffer == NULL || size == 0) 76 return UV_EINVAL; 77 78 uv_once(&process_title_mutex_once, init_process_title_mutex_once); 79 uv_mutex_lock(&process_title_mutex); 80 81 if (process_title != NULL) { 82 len = strlen(process_title) + 1; 83 84 if (size < len) { 85 uv_mutex_unlock(&process_title_mutex); 86 return UV_ENOBUFS; 87 } 88 89 memcpy(buffer, process_title, len); 90 } else { 91 len = 0; 92 } 93 94 uv_mutex_unlock(&process_title_mutex); 95 96 buffer[len] = '\0'; 97 98 return 0; 99 } 100