1/*- 2 * Copyright (c) 2010 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30#include <sys/ioctl.h> 31#include <sys/types.h> 32#include <fcntl.h> 33#include <stddef.h> 34#include <stdlib.h> 35#include <string.h> 36#include <unistd.h> 37 38#include "libefi_int.h" 39 40static int __iofd = -1; 41 42static void 43iodev_fd_close(void) 44{ 45 46 close(__iofd); 47} 48 49static int 50iodev_fd(int *fd) 51{ 52 53 *fd = __iofd; 54 if (__iofd != -1) 55 return (0); 56 57 __iofd = open("/dev/io", O_RDWR); 58 if (__iofd == -1) 59 return (errno); 60 61 atexit(iodev_fd_close); 62 *fd = __iofd; 63 return (0); 64} 65 66int 67libefi_ucs2_to_utf8(u_short *nm, size_t *szp, char *name) 68{ 69 size_t len, sz; 70 u_short c; 71 72 len = 0; 73 sz = *szp; 74 while (*nm) { 75 c = *nm++; 76 if (c > 0x7ff) { 77 if (len++ < sz) 78 *name++ = 0xE0 | (c >> 12); 79 if (len++ < sz) 80 *name++ = 0x80 | ((c >> 6) & 0x3f); 81 if (len++ < sz) 82 *name++ = 0x80 | (c & 0x3f); 83 } else if (c > 0x7f) { 84 if (len++ < sz) 85 *name++ = 0xC0 | ((c >> 6) & 0x1f); 86 if (len++ < sz) 87 *name++ = 0x80 | (c & 0x3f); 88 } else { 89 if (len++ < sz) 90 *name++ = (c & 0x7f); 91 } 92 } 93 if (len++ < sz) 94 *name++ = 0; 95 96 *szp = len; 97 return ((len <= sz) ? 0 : EOVERFLOW); 98} 99 100int 101libefi_utf8_to_ucs2(char *name, size_t *szp, u_short **nmp) 102{ 103 u_short *nm; 104 size_t sz; 105 uint32_t ucs4; 106 int c, bytes; 107 108 *szp = sz = (*szp == 0) ? strlen(name) * 2 + 2 : *szp; 109 *nmp = nm = malloc(sz); 110 111 ucs4 = 0; 112 bytes = 0; 113 while (sz > 1 && *name != '\0') { 114 c = *name++; 115 /* 116 * Conditionalize on the two major character types: 117 * initial and followup characters. 118 */ 119 if ((c & 0xc0) != 0x80) { 120 /* Initial characters. */ 121 if (bytes != 0) { 122 free(nm); 123 return (EILSEQ); 124 } 125 if ((c & 0xf8) == 0xf0) { 126 ucs4 = c & 0x07; 127 bytes = 3; 128 } else if ((c & 0xf0) == 0xe0) { 129 ucs4 = c & 0x0f; 130 bytes = 2; 131 } else if ((c & 0xe0) == 0xc0) { 132 ucs4 = c & 0x1f; 133 bytes = 1; 134 } else { 135 ucs4 = c & 0x7f; 136 bytes = 0; 137 } 138 } else { 139 /* Followup characters. */ 140 if (bytes > 0) { 141 ucs4 = (ucs4 << 6) + (c & 0x3f); 142 bytes--; 143 } else if (bytes == 0) { 144 free(nm); 145 return (EILSEQ); 146 } 147 } 148 if (bytes == 0) { 149 if (ucs4 > 0xffff) { 150 free(nm); 151 return (EILSEQ); 152 } 153 *nm++ = (u_short)ucs4; 154 sz -= 2; 155 } 156 } 157 if (sz < 2) { 158 free(nm); 159 return (EDOOFUS); 160 } 161 *nm = 0; 162 return (0); 163} 164 165int 166libefi_efivar(struct iodev_efivar_req *req) 167{ 168 int error, fd; 169 170 error = iodev_fd(&fd); 171 if (!error) 172 error = (ioctl(fd, IODEV_EFIVAR, req) == -1) ? errno : 0; 173 if (!error) 174 error = req->result; 175 return (error); 176} 177