1 /*- 2 * Copyright (c) 2001 The FreeBSD Project 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 * $FreeBSD$ 27 */ 28 29 #include "opt_compat.h" 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/proc.h> 34 #include <sys/sysproto.h> 35 36 #include <machine/../linux/linux.h> 37 #include <machine/../linux/linux_proto.h> 38 #include <compat/linux/linux_util.h> 39 40 DUMMY(setfsuid16); 41 DUMMY(setfsgid16); 42 DUMMY(getresuid16); 43 DUMMY(getresgid16); 44 45 int 46 linux_chown16(struct thread *td, struct linux_chown16_args *args) 47 { 48 struct chown_args bsd; 49 caddr_t sg; 50 51 sg = stackgap_init(); 52 CHECKALTEXIST(td, &sg, args->path); 53 54 #ifdef DEBUG 55 if (ldebug(chown16)) 56 printf(ARGS(chown16, "%s, %d, %d"), args->path, args->uid, 57 args->gid); 58 #endif 59 60 bsd.path = args->path; 61 bsd.uid = args->uid; 62 bsd.gid = args->gid; 63 return (chown(td, &bsd)); 64 } 65 66 int 67 linux_lchown16(struct thread *td, struct linux_lchown16_args *args) 68 { 69 struct lchown_args bsd; 70 caddr_t sg; 71 72 sg = stackgap_init(); 73 CHECKALTEXIST(td, &sg, args->path); 74 75 #ifdef DEBUG 76 if (ldebug(lchown16)) 77 printf(ARGS(lchown16, "%s, %d, %d"), args->path, args->uid, 78 args->gid); 79 #endif 80 81 bsd.path = args->path; 82 bsd.uid = args->uid; 83 bsd.gid = args->gid; 84 return (lchown(td, &bsd)); 85 } 86 87 int 88 linux_setgroups16(struct thread *td, struct linux_setgroups16_args *args) 89 { 90 struct ucred *newcred, *oldcred; 91 l_gid16_t linux_gidset[NGROUPS]; 92 gid_t *bsd_gidset; 93 int ngrp, error; 94 95 #ifdef DEBUG 96 if (ldebug(setgroups16)) 97 printf(ARGS(setgroups16, "%d, *"), args->gidsetsize); 98 #endif 99 100 ngrp = args->gidsetsize; 101 oldcred = td->td_proc->p_ucred; 102 103 /* 104 * cr_groups[0] holds egid. Setting the whole set from 105 * the supplied set will cause egid to be changed too. 106 * Keep cr_groups[0] unchanged to prevent that. 107 */ 108 109 if ((error = suser_xxx(oldcred, NULL, PRISON_ROOT)) != 0) 110 return (error); 111 112 if (ngrp >= NGROUPS) 113 return (EINVAL); 114 115 newcred = crdup(oldcred); 116 if (ngrp > 0) { 117 error = copyin((caddr_t)args->gidset, linux_gidset, 118 ngrp * sizeof(l_gid16_t)); 119 if (error) 120 return (error); 121 122 newcred->cr_ngroups = ngrp + 1; 123 124 bsd_gidset = newcred->cr_groups; 125 ngrp--; 126 while (ngrp >= 0) { 127 bsd_gidset[ngrp + 1] = linux_gidset[ngrp]; 128 ngrp--; 129 } 130 } 131 else 132 newcred->cr_ngroups = 1; 133 134 setsugid(td->td_proc); 135 td->td_proc->p_ucred = newcred; 136 crfree(oldcred); 137 return (0); 138 } 139 140 int 141 linux_getgroups16(struct thread *td, struct linux_getgroups16_args *args) 142 { 143 struct ucred *cred; 144 l_gid16_t linux_gidset[NGROUPS]; 145 gid_t *bsd_gidset; 146 int bsd_gidsetsz, ngrp, error; 147 148 #ifdef DEBUG 149 if (ldebug(getgroups16)) 150 printf(ARGS(getgroups16, "%d, *"), args->gidsetsize); 151 #endif 152 153 cred = td->td_proc->p_ucred; 154 bsd_gidset = cred->cr_groups; 155 bsd_gidsetsz = cred->cr_ngroups - 1; 156 157 /* 158 * cr_groups[0] holds egid. Returning the whole set 159 * here will cause a duplicate. Exclude cr_groups[0] 160 * to prevent that. 161 */ 162 163 if ((ngrp = args->gidsetsize) == 0) { 164 td->td_retval[0] = bsd_gidsetsz; 165 return (0); 166 } 167 168 if (ngrp < bsd_gidsetsz) 169 return (EINVAL); 170 171 ngrp = 0; 172 while (ngrp < bsd_gidsetsz) { 173 linux_gidset[ngrp] = bsd_gidset[ngrp + 1]; 174 ngrp++; 175 } 176 177 error = copyout(linux_gidset, (caddr_t)args->gidset, 178 ngrp * sizeof(l_gid16_t)); 179 if (error) 180 return (error); 181 182 td->td_retval[0] = ngrp; 183 return (0); 184 } 185 186 /* 187 * The FreeBSD native getgid(2) and getuid(2) also modify td->td_retval[1] 188 * when COMPAT_43 or COMPAT_SUNOS is defined. This globbers registers that 189 * are assumed to be preserved. The following lightweight syscalls fixes 190 * this. See also linux_getpid(2), linux_getgid(2) and linux_getuid(2) in 191 * linux_misc.c 192 * 193 * linux_getgid16() - MP SAFE 194 * linux_getuid16() - MP SAFE 195 */ 196 197 int 198 linux_getgid16(struct thread *td, struct linux_getgid16_args *args) 199 { 200 201 td->td_retval[0] = td->td_proc->p_ucred->cr_rgid; 202 return (0); 203 } 204 205 int 206 linux_getuid16(struct thread *td, struct linux_getuid16_args *args) 207 { 208 209 td->td_retval[0] = td->td_proc->p_ucred->cr_ruid; 210 return (0); 211 } 212 213 int 214 linux_getegid16(struct thread *td, struct linux_getegid16_args *args) 215 { 216 struct getegid_args bsd; 217 218 return (getegid(td, &bsd)); 219 } 220 221 int 222 linux_geteuid16(struct thread *td, struct linux_geteuid16_args *args) 223 { 224 struct geteuid_args bsd; 225 226 return (geteuid(td, &bsd)); 227 } 228 229 int 230 linux_setgid16(struct thread *td, struct linux_setgid16_args *args) 231 { 232 struct setgid_args bsd; 233 234 bsd.gid = args->gid; 235 return (setgid(td, &bsd)); 236 } 237 238 int 239 linux_setuid16(struct thread *td, struct linux_setuid16_args *args) 240 { 241 struct setuid_args bsd; 242 243 bsd.uid = args->uid; 244 return (setuid(td, &bsd)); 245 } 246 247 int 248 linux_setregid16(struct thread *td, struct linux_setregid16_args *args) 249 { 250 struct setregid_args bsd; 251 252 bsd.rgid = args->rgid; 253 bsd.egid = args->egid; 254 return (setregid(td, &bsd)); 255 } 256 257 int 258 linux_setreuid16(struct thread *td, struct linux_setreuid16_args *args) 259 { 260 struct setreuid_args bsd; 261 262 bsd.ruid = args->ruid; 263 bsd.euid = args->euid; 264 return (setreuid(td, &bsd)); 265 } 266 267 int 268 linux_setresgid16(struct thread *td, struct linux_setresgid16_args *args) 269 { 270 struct setresgid_args bsd; 271 272 bsd.rgid = args->rgid; 273 bsd.egid = args->egid; 274 bsd.sgid = args->sgid; 275 return (setresgid(td, &bsd)); 276 } 277 278 int 279 linux_setresuid16(struct thread *td, struct linux_setresuid16_args *args) 280 { 281 struct setresuid_args bsd; 282 283 bsd.ruid = args->ruid; 284 bsd.euid = args->euid; 285 bsd.suid = args->suid; 286 return (setresuid(td, &bsd)); 287 } 288