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 <stddef.h> 26 #include <unistd.h> 27 28 int uv_exepath(char* buffer, size_t* size) { 29 ssize_t n; 30 31 if (buffer == NULL || size == NULL || *size == 0) 32 return UV_EINVAL; 33 34 n = *size - 1; 35 if (n > 0) 36 n = readlink("/proc/self/exe", buffer, n); 37 38 if (n == -1) 39 return UV__ERR(errno); 40 41 buffer[n] = '\0'; 42 *size = n; 43 44 return 0; 45 } 46