| /* Copyright Joyent, Inc. and other Node contributors. All rights reserved. |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to |
| * deal in the Software without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| */ |
| |
| #include "uv.h" |
| #include "internal.h" |
| |
| #include <stdlib.h> |
| #include <string.h> |
| |
| struct uv__process_title { |
| char* str; |
| size_t len; /* Length of the current process title. */ |
| size_t cap; /* Maximum capacity. Computed once in uv_setup_args(). */ |
| }; |
| |
| extern void uv__set_process_title(const char* title); |
| |
| static uv_mutex_t process_title_mutex; |
| static uv_once_t process_title_mutex_once = UV_ONCE_INIT; |
| static struct uv__process_title process_title; |
| static void* args_mem; |
| |
| |
| static void init_process_title_mutex_once(void) { |
| uv_mutex_init(&process_title_mutex); |
| } |
| |
| |
| char** uv_setup_args(int argc, char** argv) { |
| struct uv__process_title pt; |
| char** new_argv; |
| size_t size; |
| char* s; |
| int i; |
| |
| if (argc <= 0) |
| return argv; |
| |
| pt.str = argv[0]; |
| pt.len = strlen(argv[0]); |
| pt.cap = pt.len + 1; |
| |
| /* Calculate how much memory we need for the argv strings. */ |
| size = pt.cap; |
| for (i = 1; i < argc; i++) |
| size += strlen(argv[i]) + 1; |
| |
| /* Add space for the argv pointers. */ |
| size += (argc + 1) * sizeof(char*); |
| |
| new_argv = uv__malloc(size); |
| if (new_argv == NULL) |
| return argv; |
| |
| /* Copy over the strings and set up the pointer table. */ |
| i = 0; |
| s = (char*) &new_argv[argc + 1]; |
| size = pt.cap; |
| goto loop; |
| |
| for (/* empty */; i < argc; i++) { |
| size = strlen(argv[i]) + 1; |
| loop: |
| memcpy(s, argv[i], size); |
| new_argv[i] = s; |
| s += size; |
| } |
| new_argv[i] = NULL; |
| |
| /* argv is not adjacent on z/os, we use just argv[0] on that platform. */ |
| #ifndef __MVS__ |
| pt.cap = argv[i - 1] + size - argv[0]; |
| #endif |
| |
| args_mem = new_argv; |
| process_title = pt; |
| |
| return new_argv; |
| } |
| |
| |
| int uv_set_process_title(const char* title) { |
| struct uv__process_title* pt; |
| size_t len; |
| |
| pt = &process_title; |
| len = strlen(title); |
| |
| uv_once(&process_title_mutex_once, init_process_title_mutex_once); |
| uv_mutex_lock(&process_title_mutex); |
| |
| if (len >= pt->cap) { |
| len = 0; |
| if (pt->cap > 0) |
| len = pt->cap - 1; |
| } |
| |
| memcpy(pt->str, title, len); |
| memset(pt->str + len, '\0', pt->cap - len); |
| pt->len = len; |
| |
| uv_mutex_unlock(&process_title_mutex); |
| |
| return 0; |
| } |
| |
| |
| int uv_get_process_title(char* buffer, size_t size) { |
| if (buffer == NULL || size == 0) |
| return UV_EINVAL; |
| |
| uv_once(&process_title_mutex_once, init_process_title_mutex_once); |
| uv_mutex_lock(&process_title_mutex); |
| |
| if (size <= process_title.len) { |
| uv_mutex_unlock(&process_title_mutex); |
| return UV_ENOBUFS; |
| } |
| |
| if (process_title.len != 0) |
| memcpy(buffer, process_title.str, process_title.len + 1); |
| |
| buffer[process_title.len] = '\0'; |
| |
| uv_mutex_unlock(&process_title_mutex); |
| |
| return 0; |
| } |
| |
| |
| void uv__process_title_cleanup(void) { |
| uv__free(args_mem); /* Keep valgrind happy. */ |
| args_mem = NULL; |
| } |