1 /* ----------------------------------------------------------------------- * 2 * 3 * Copyright 2005-2008 H. Peter Anvin - All Rights Reserved 4 * 5 * Permission is hereby granted, free of charge, to any person 6 * obtaining a copy of this software and associated documentation 7 * files (the "Software"), to deal in the Software without 8 * restriction, including without limitation the rights to use, 9 * copy, modify, merge, publish, distribute, sublicense, and/or 10 * sell copies of the Software, and to permit persons to whom 11 * the Software is furnished to do so, subject to the following 12 * conditions: 13 * 14 * The above copyright notice and this permission notice shall 15 * be included in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 19 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 21 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 22 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 24 * OTHER DEALINGS IN THE SOFTWARE. 25 * 26 * ----------------------------------------------------------------------- */ 27 28 /* 29 * fstat.c 30 * 31 * Very trivial fstat emulation 32 */ 33 34 #include <sys/stat.h> 35 #include <errno.h> 36 #include "file.h" 37 38 int fstat(int fd, struct stat *buf) 39 { 40 struct file_info *fp = &__file_info[fd]; 41 42 if (fd >= NFILES || !fp->iop) { 43 errno = EBADF; 44 return -1; 45 } 46 47 if (fp->iop->flags & __DEV_FILE) { 48 if (fp->i.fd.size == (uint32_t) - 1) { 49 /* File of unknown length, report it as a socket 50 (it probably really is, anyway!) */ 51 buf->st_mode = S_IFSOCK | 0444; 52 buf->st_size = 0; 53 } else { 54 buf->st_mode = S_IFREG | 0444; 55 buf->st_size = fp->i.fd.size; 56 } 57 } else { 58 buf->st_mode = S_IFCHR | 0666; 59 buf->st_size = 0; 60 } 61 62 return 0; 63 } 64
