1 /* 2 * Copyright 2007-2008, Ingo Weinhold, bonefish@cs.tu-berlin.de. 3 * Distributed under the terms of the MIT License. 4 */ 5 6 #include "compatibility.h" 7 8 #include "fssh_uio.h" 9 10 #if defined(HAIKU_HOST_PLATFORM_FREEBSD) 11 #include <unistd.h> 12 #endif 13 14 #include <new> 15 16 #include <errno.h> 17 #include <sys/uio.h> 18 19 #include "partition_support.h" 20 21 22 static const fssh_size_t kMaxIOVecs = 1024; 23 24 25 bool 26 prepare_iovecs(const struct fssh_iovec *vecs, fssh_size_t count, 27 struct iovec* systemVecs) 28 { 29 if (count > kMaxIOVecs) { 30 errno = B_BAD_VALUE; 31 return false; 32 } 33 34 for (fssh_size_t i = 0; i < count; i++) { 35 systemVecs[i].iov_base = vecs[i].iov_base; 36 systemVecs[i].iov_len = vecs[i].iov_len; 37 } 38 39 return true; 40 } 41 42 43 fssh_ssize_t 44 fssh_readv(int fd, const struct fssh_iovec *vector, fssh_size_t count) 45 { 46 struct iovec systemVecs[kMaxIOVecs]; 47 if (!prepare_iovecs(vector, count, systemVecs)) 48 return -1; 49 50 fssh_off_t pos = -1; 51 fssh_size_t length = 0; 52 if (FSShell::restricted_file_restrict_io(fd, pos, length) < 0) 53 return -1; 54 55 #if !defined(HAIKU_HOST_PLATFORM_FREEBSD) 56 return readv(fd, systemVecs, count); 57 #else 58 return readv_pos(fd, lseek(fd, 0, SEEK_CUR), systemVecs, count); 59 #endif 60 } 61 62 63 fssh_ssize_t 64 fssh_readv_pos(int fd, fssh_off_t pos, const struct fssh_iovec *vec, 65 fssh_size_t count) 66 { 67 struct iovec systemVecs[kMaxIOVecs]; 68 if (!prepare_iovecs(vec, count, systemVecs)) 69 return -1; 70 71 fssh_size_t length = 0; 72 if (FSShell::restricted_file_restrict_io(fd, pos, length) < 0) 73 return -1; 74 75 return readv_pos(fd, pos, systemVecs, count); 76 } 77 78 79 fssh_ssize_t 80 fssh_writev(int fd, const struct fssh_iovec *vector, fssh_size_t count) 81 { 82 struct iovec systemVecs[kMaxIOVecs]; 83 if (!prepare_iovecs(vector, count, systemVecs)) 84 return -1; 85 86 fssh_off_t pos = -1; 87 fssh_size_t length = 0; 88 if (FSShell::restricted_file_restrict_io(fd, pos, length) < 0) 89 return -1; 90 91 #if !defined(HAIKU_HOST_PLATFORM_FREEBSD) 92 return writev(fd, systemVecs, count); 93 #else 94 return writev_pos(fd, lseek(fd, 0, SEEK_CUR), systemVecs, count); 95 #endif 96 } 97 98 99 fssh_ssize_t 100 fssh_writev_pos(int fd, fssh_off_t pos, const struct fssh_iovec *vec, 101 fssh_size_t count) 102 { 103 struct iovec systemVecs[kMaxIOVecs]; 104 if (!prepare_iovecs(vec, count, systemVecs)) 105 return -1; 106 107 fssh_size_t length = 0; 108 if (FSShell::restricted_file_restrict_io(fd, pos, length) < 0) 109 return -1; 110 111 return writev_pos(fd, pos, systemVecs, count); 112 } 113