acl_support_nfs4.c revision 297790
1194955Strasz/*- 2194955Strasz * Copyright (c) 2008, 2009 Edward Tomasz Napiera��a <trasz@FreeBSD.org> 3194955Strasz * All rights reserved. 4194955Strasz * 5194955Strasz * Redistribution and use in source and binary forms, with or without 6194955Strasz * modification, are permitted provided that the following conditions 7194955Strasz * are met: 8194955Strasz * 1. Redistributions of source code must retain the above copyright 9194955Strasz * notice, this list of conditions and the following disclaimer. 10194955Strasz * 2. Redistributions in binary form must reproduce the above copyright 11194955Strasz * notice, this list of conditions and the following disclaimer in the 12194955Strasz * documentation and/or other materials provided with the distribution. 13194955Strasz * 14194955Strasz * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15194955Strasz * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16194955Strasz * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17194955Strasz * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18194955Strasz * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19194955Strasz * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20194955Strasz * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21194955Strasz * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22194955Strasz * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23194955Strasz * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24194955Strasz * SUCH DAMAGE. 25194955Strasz */ 26194955Strasz 27194955Strasz#include <sys/cdefs.h> 28194955Strasz__FBSDID("$FreeBSD: head/lib/libc/posix1e/acl_support_nfs4.c 297790 2016-04-10 19:33:58Z pfg $"); 29194955Strasz 30194955Strasz#include <stdio.h> 31194955Strasz#include <stdlib.h> 32194955Strasz#include <string.h> 33194955Strasz#include <assert.h> 34194955Strasz#include <err.h> 35194955Strasz#include <sys/acl.h> 36194955Strasz#include "acl_support.h" 37194955Strasz 38194955Straszstruct flagnames_struct { 39194955Strasz uint32_t flag; 40194955Strasz const char *name; 41194955Strasz char letter; 42194955Strasz}; 43194955Strasz 44194955Straszstruct flagnames_struct a_flags[] = 45194955Strasz {{ ACL_ENTRY_FILE_INHERIT, "file_inherit", 'f'}, 46194955Strasz { ACL_ENTRY_DIRECTORY_INHERIT, "dir_inherit", 'd'}, 47194955Strasz { ACL_ENTRY_INHERIT_ONLY, "inherit_only", 'i'}, 48194955Strasz { ACL_ENTRY_NO_PROPAGATE_INHERIT, "no_propagate", 'n'}, 49194955Strasz { ACL_ENTRY_SUCCESSFUL_ACCESS, "successfull_access", 'S'}, 50194955Strasz { ACL_ENTRY_FAILED_ACCESS, "failed_access", 'F'}, 51287445Sdelphij { ACL_ENTRY_INHERITED, "inherited", 'I' }, 52194955Strasz /* 53194955Strasz * There is no ACE_IDENTIFIER_GROUP here - SunOS does not show it 54194955Strasz * in the "flags" field. There is no ACE_OWNER, ACE_GROUP or 55194955Strasz * ACE_EVERYONE either, for obvious reasons. 56194955Strasz */ 57194955Strasz { 0, 0, 0}}; 58194955Strasz 59194955Straszstruct flagnames_struct a_access_masks[] = 60194955Strasz {{ ACL_READ_DATA, "read_data", 'r'}, 61194955Strasz { ACL_WRITE_DATA, "write_data", 'w'}, 62194955Strasz { ACL_EXECUTE, "execute", 'x'}, 63194955Strasz { ACL_APPEND_DATA, "append_data", 'p'}, 64194955Strasz { ACL_DELETE_CHILD, "delete_child", 'D'}, 65194955Strasz { ACL_DELETE, "delete", 'd'}, 66194955Strasz { ACL_READ_ATTRIBUTES, "read_attributes", 'a'}, 67194955Strasz { ACL_WRITE_ATTRIBUTES, "write_attributes", 'A'}, 68194955Strasz { ACL_READ_NAMED_ATTRS, "read_xattr", 'R'}, 69194955Strasz { ACL_WRITE_NAMED_ATTRS, "write_xattr", 'W'}, 70194955Strasz { ACL_READ_ACL, "read_acl", 'c'}, 71194955Strasz { ACL_WRITE_ACL, "write_acl", 'C'}, 72194955Strasz { ACL_WRITE_OWNER, "write_owner", 'o'}, 73194955Strasz { ACL_SYNCHRONIZE, "synchronize", 's'}, 74220465Strasz { ACL_FULL_SET, "full_set", '\0'}, 75220465Strasz { ACL_MODIFY_SET, "modify_set", '\0'}, 76220465Strasz { ACL_READ_SET, "read_set", '\0'}, 77220465Strasz { ACL_WRITE_SET, "write_set", '\0'}, 78194955Strasz { 0, 0, 0}}; 79194955Strasz 80194955Straszstatic const char * 81194955Straszformat_flag(uint32_t *var, const struct flagnames_struct *flags) 82194955Strasz{ 83194955Strasz 84297790Spfg for (; flags->name != NULL; flags++) { 85194955Strasz if ((flags->flag & *var) == 0) 86194955Strasz continue; 87194955Strasz 88194955Strasz *var &= ~flags->flag; 89194955Strasz return (flags->name); 90194955Strasz } 91194955Strasz 92194955Strasz return (NULL); 93194955Strasz} 94194955Strasz 95194955Straszstatic int 96194955Straszformat_flags_verbose(char *str, size_t size, uint32_t var, 97194955Strasz const struct flagnames_struct *flags) 98194955Strasz{ 99194955Strasz size_t off = 0; 100194955Strasz const char *tmp; 101194955Strasz 102194955Strasz while ((tmp = format_flag(&var, flags)) != NULL) { 103194955Strasz off += snprintf(str + off, size - off, "%s/", tmp); 104194955Strasz assert (off < size); 105194955Strasz } 106194955Strasz 107194955Strasz /* If there were any flags added... */ 108194955Strasz if (off > 0) { 109194955Strasz off--; 110194955Strasz /* ... then remove the last slash. */ 111194955Strasz assert(str[off] == '/'); 112194955Strasz } 113194955Strasz 114194955Strasz str[off] = '\0'; 115194955Strasz 116194955Strasz return (0); 117194955Strasz} 118194955Strasz 119194955Straszstatic int 120194955Straszformat_flags_compact(char *str, size_t size, uint32_t var, 121194955Strasz const struct flagnames_struct *flags) 122194955Strasz{ 123194955Strasz size_t i; 124194955Strasz 125220465Strasz for (i = 0; flags[i].letter != '\0'; i++) { 126194955Strasz assert(i < size); 127194955Strasz if ((flags[i].flag & var) == 0) 128194955Strasz str[i] = '-'; 129194955Strasz else 130194955Strasz str[i] = flags[i].letter; 131194955Strasz } 132194955Strasz 133194955Strasz str[i] = '\0'; 134194955Strasz 135194955Strasz return (0); 136194955Strasz} 137194955Strasz 138194955Straszstatic int 139194955Straszparse_flags_verbose(const char *strp, uint32_t *var, 140194955Strasz const struct flagnames_struct *flags, const char *flags_name, 141194955Strasz int *try_compact) 142194955Strasz{ 143194955Strasz int i, found, ever_found = 0; 144194955Strasz char *str, *flag; 145194955Strasz 146194955Strasz str = strdup(strp); 147194955Strasz *try_compact = 0; 148194955Strasz *var = 0; 149194955Strasz 150194955Strasz while (str != NULL) { 151194955Strasz flag = strsep(&str, "/:"); 152194955Strasz 153194955Strasz found = 0; 154194955Strasz for (i = 0; flags[i].name != NULL; i++) { 155194955Strasz if (strcmp(flags[i].name, flag) == 0) { 156194955Strasz *var |= flags[i].flag; 157194955Strasz found = 1; 158194955Strasz ever_found = 1; 159194955Strasz } 160194955Strasz } 161194955Strasz 162194955Strasz if (!found) { 163194955Strasz if (ever_found) 164194955Strasz warnx("malformed ACL: \"%s\" field contains " 165194955Strasz "invalid flag \"%s\"", flags_name, flag); 166194955Strasz else 167194955Strasz *try_compact = 1; 168194955Strasz free(str); 169194955Strasz return (-1); 170194955Strasz } 171194955Strasz } 172194955Strasz 173194955Strasz free(str); 174194955Strasz return (0); 175194955Strasz} 176194955Strasz 177194955Straszstatic int 178194955Straszparse_flags_compact(const char *str, uint32_t *var, 179194955Strasz const struct flagnames_struct *flags, const char *flags_name) 180194955Strasz{ 181194955Strasz int i, j, found; 182194955Strasz 183194955Strasz *var = 0; 184194955Strasz 185194955Strasz for (i = 0;; i++) { 186194955Strasz if (str[i] == '\0') 187194955Strasz return (0); 188194955Strasz 189194955Strasz /* Ignore minus signs. */ 190194955Strasz if (str[i] == '-') 191194955Strasz continue; 192194955Strasz 193194955Strasz found = 0; 194194955Strasz 195194955Strasz for (j = 0; flags[j].name != NULL; j++) { 196194955Strasz if (flags[j].letter == str[i]) { 197194955Strasz *var |= flags[j].flag; 198194955Strasz found = 1; 199194955Strasz break; 200194955Strasz } 201194955Strasz } 202194955Strasz 203194955Strasz if (!found) { 204194955Strasz warnx("malformed ACL: \"%s\" field contains " 205194955Strasz "invalid flag \"%c\"", flags_name, str[i]); 206194955Strasz return (-1); 207194955Strasz } 208194955Strasz } 209194955Strasz} 210194955Strasz 211194955Straszint 212194955Strasz_nfs4_format_flags(char *str, size_t size, acl_flag_t var, int verbose) 213194955Strasz{ 214194955Strasz 215194955Strasz if (verbose) 216194955Strasz return (format_flags_verbose(str, size, var, a_flags)); 217194955Strasz 218194955Strasz return (format_flags_compact(str, size, var, a_flags)); 219194955Strasz} 220194955Strasz 221194955Straszint 222194955Strasz_nfs4_format_access_mask(char *str, size_t size, acl_perm_t var, int verbose) 223194955Strasz{ 224194955Strasz 225194955Strasz if (verbose) 226194955Strasz return (format_flags_verbose(str, size, var, a_access_masks)); 227194955Strasz 228194955Strasz return (format_flags_compact(str, size, var, a_access_masks)); 229194955Strasz} 230194955Strasz 231194955Straszint 232194955Strasz_nfs4_parse_flags(const char *str, acl_flag_t *flags) 233194955Strasz{ 234194955Strasz int error, try_compact; 235194955Strasz int tmpflags; 236194955Strasz 237194955Strasz error = parse_flags_verbose(str, &tmpflags, a_flags, "flags", &try_compact); 238194955Strasz if (error && try_compact) 239194955Strasz error = parse_flags_compact(str, &tmpflags, a_flags, "flags"); 240194955Strasz 241194955Strasz *flags = tmpflags; 242194955Strasz 243194955Strasz return (error); 244194955Strasz} 245194955Strasz 246194955Straszint 247194955Strasz_nfs4_parse_access_mask(const char *str, acl_perm_t *perms) 248194955Strasz{ 249194955Strasz int error, try_compact; 250194955Strasz int tmpperms; 251194955Strasz 252194955Strasz error = parse_flags_verbose(str, &tmpperms, a_access_masks, 253194955Strasz "access permissions", &try_compact); 254194955Strasz if (error && try_compact) 255194955Strasz error = parse_flags_compact(str, &tmpperms, 256194955Strasz a_access_masks, "access permissions"); 257194955Strasz 258194955Strasz *perms = tmpperms; 259194955Strasz 260194955Strasz return (error); 261194955Strasz} 262