sys/compat/linux32/common/linux32_uid16.c

   1 /* $NetBSD: linux32_uid16.c,v 1.1 2008/01/15 22:38:35 njoly Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
   5  * Copyright (c) 2008 Nicolas Joly, all rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Emmanuel Dreyfus
  18  * 4. The name of the author may not be used to endorse or promote
  19  *    products derived from this software without specific prior written
  20  *    permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS''
  23  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  24  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  25  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
  26  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  32  * POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 __KERNEL_RCSID(0, "$NetBSD: linux32_uid16.c,v 1.1 2008/01/15 22:38:35 njoly Exp $");
  37
  38 #include <sys/param.h>
  39 #include <sys/proc.h>
  40 #include <sys/kauth.h>
  41
  42 #include <compat/netbsd32/netbsd32.h>
  43
  44 #include <compat/linux/common/linux_types.h>
  45 #include <compat/linux/common/linux_signal.h>
  46 #include <compat/linux/common/linux_ipc.h>
  47 #include <compat/linux/common/linux_sem.h>
  48 #include <compat/linux/linux_syscallargs.h>
  49
  50 #include <compat/linux32/common/linux32_types.h>
  51 #include <compat/linux32/common/linux32_signal.h>
  52 #include <compat/linux32/common/linux32_machdep.h>
  53 #include <compat/linux32/linux32_syscallargs.h>
  54
  55 #define LINUX32TOBSD_UID(u) \
  56         (((u) == (linux32_uid16_t)-1) ? -1 : (u))
  57 #define LINUX32TOBSD_GID(g) \
  58         (((g) == (linux32_gid16_t)-1) ? -1 : (g))
  59
  60 #define BSDTOLINUX32_UID(u) \
  61         (((u) & ~0xffff) ? (linux32_uid16_t)65534 : (linux32_uid16_t)(u))
  62 #define BSDTOLINUX32_GID(g) \
  63         (((g) & ~0xffff) ? (linux32_gid16_t)65534 : (linux32_gid16_t)(g))
  64
  65 int
  66 linux32_sys_chown16(struct lwp *l, const struct linux32_sys_chown16_args *uap, register_t *retval)
  67 {
  68         /* {
  69                 syscallarg(const netbsd32_charp) path;
  70                 syscallarg(linux32_uid16_t) uid;
  71                 syscallarg(linux32_gid16_t) gid;
  72         } */
  73         struct sys___posix_chown_args ua;
  74
  75         NETBSD32TOP_UAP(path, const char);
  76         SCARG(&ua, uid) = LINUX32TOBSD_UID(SCARG(uap, uid));
  77         SCARG(&ua, gid) = LINUX32TOBSD_GID(SCARG(uap, gid));
  78
  79         return sys___posix_chown(l, &ua, retval);
  80 }
  81
  82 int
  83 linux32_sys_lchown16(struct lwp *l, const struct linux32_sys_lchown16_args *uap, register_t *retval)
  84 {
  85         /* {
  86                 syscallarg(const netbsd32_charp) path;
  87                 syscallarg(linux32_uid16_t) uid;
  88                 syscallarg(linux32_gid16_t) gid;
  89         } */
  90         struct sys___posix_lchown_args ua;
  91
  92         NETBSD32TOP_UAP(path, const char);
  93         SCARG(&ua, uid) = LINUX32TOBSD_UID(SCARG(uap, uid));
  94         SCARG(&ua, gid) = LINUX32TOBSD_GID(SCARG(uap, gid));
  95
  96         return sys___posix_lchown(l, &ua, retval);
  97 }
  98
  99 int
 100 linux32_sys_fchown16(struct lwp *l, const struct linux32_sys_fchown16_args *uap, register_t *retval)
 101 {
 102         /* {
 103                 syscallarg(int) fd;
 104                 syscallarg(linux32_uid16_t) uid;
 105                 syscallarg(linux32_gid16_t) gid;
 106         } */
 107         struct sys___posix_fchown_args ua;
 108
 109         SCARG(&ua, fd) = SCARG(uap, fd);
 110         SCARG(&ua, uid) = LINUX32TOBSD_UID(SCARG(uap, uid));
 111         SCARG(&ua, gid) = LINUX32TOBSD_GID(SCARG(uap, gid));
 112
 113         return sys___posix_fchown(l, &ua, retval);
 114 }
 115
 116 int
 117 linux32_sys_getgroups16(struct lwp *l, const struct linux32_sys_getgroups16_args *uap, register_t *retval)
 118 {
 119         /* {
 120                 syscallarg(int) gidsetsize;
 121                 syscallarg(linux32_gid16p_t) gidset;
 122         } */
 123         struct linux_sys_getgroups16_args ua;
 124
 125         NETBSD32TO64_UAP(gidsetsize);
 126         NETBSD32TOP_UAP(gidset, linux_gid16_t);
 127
 128         return linux_sys_getgroups16(l, &ua, retval);
 129 }
 130
 131 int
 132 linux32_sys_setgroups16(struct lwp *l, const struct linux32_sys_setgroups16_args *uap, register_t *retval)
 133 {
 134         /* {
 135                 syscallarg(int) gidsetsize;
 136                 syscallarg(linux32_gid16p_t) gidset;
 137         } */
 138         struct linux_sys_setgroups16_args ua;
 139
 140         NETBSD32TO64_UAP(gidsetsize);
 141         NETBSD32TOP_UAP(gidset, linux_gid16_t);
 142
 143         return linux_sys_setgroups16(l, &ua, retval);
 144 }
 145
 146 int
 147 linux32_sys_setreuid16(struct lwp *l, const struct linux32_sys_setreuid16_args *uap, register_t *retval)
 148 {
 149         /* {
 150                 syscallarg(linux32_uid16_t) ruid;
 151                 syscallarg(linux32_uid16_t) euid;
 152         } */
 153         struct sys_setreuid_args bsa;
 154
 155         SCARG(&bsa, ruid) = LINUX32TOBSD_UID(SCARG(uap, ruid));
 156         SCARG(&bsa, euid) = LINUX32TOBSD_UID(SCARG(uap, euid));
 157
 158         return sys_setreuid(l, &bsa, retval);
 159 }
 160
 161 int
 162 linux32_sys_setregid16(struct lwp *l, const struct linux32_sys_setregid16_args *uap, register_t *retval)
 163 {
 164         /* {
 165                 syscallarg(linux32_gid16_t) rgid;
 166                 syscallarg(linux32_gid16_t) egid;
 167         } */
 168         struct sys_setregid_args bsa;
 169
 170         SCARG(&bsa, rgid) = LINUX32TOBSD_GID(SCARG(uap, rgid));
 171         SCARG(&bsa, egid) = LINUX32TOBSD_GID(SCARG(uap, egid));
 172
 173         return sys_setregid(l, &bsa, retval);
 174 }
 175
 176 int
 177 linux32_sys_setresuid16(struct lwp *l, const struct linux32_sys_setresuid16_args *uap, register_t *retval)
 178 {
 179         /* {
 180                 syscallarg(linux32_uid16_t) ruid;
 181                 syscallarg(linux32_uid16_t) euid;
 182                 syscallarg(linux32_uid16_t) suid;
 183         } */
 184         struct linux32_sys_setresuid_args lsa;
 185
 186         SCARG(&lsa, ruid) = LINUX32TOBSD_UID(SCARG(uap, ruid));
 187         SCARG(&lsa, euid) = LINUX32TOBSD_UID(SCARG(uap, euid));
 188         SCARG(&lsa, suid) = LINUX32TOBSD_UID(SCARG(uap, suid));
 189
 190         return linux32_sys_setresuid(l, &lsa, retval);
 191 }
 192
 193 int
 194 linux32_sys_setresgid16(struct lwp *l, const struct linux32_sys_setresgid16_args *uap, register_t *retval)
 195 {
 196         /* {
 197                 syscallarg(linux32_gid16_t) rgid;
 198                 syscallarg(linux32_gid16_t) egid;
 199                 syscallarg(linux32_gid16_t) sgid;
 200         } */
 201         struct linux32_sys_setresgid_args lsa;
 202
 203         SCARG(&lsa, rgid) = LINUX32TOBSD_GID(SCARG(uap, rgid));
 204         SCARG(&lsa, egid) = LINUX32TOBSD_GID(SCARG(uap, egid));
 205         SCARG(&lsa, sgid) = LINUX32TOBSD_GID(SCARG(uap, sgid));
 206
 207         return linux32_sys_setresgid(l, &lsa, retval);
 208 }
 209
 210 int
 211 linux32_sys_getresuid16(struct lwp *l, const struct linux32_sys_getresuid16_args *uap, register_t *retval)
 212 {
 213         /* {
 214                 syscallarg(linux32_uid16p_t) ruid;
 215                 syscallarg(linux32_uid16p_t) euid;
 216                 syscallarg(linux32_uid16p_t) suid;
 217         } */
 218         kauth_cred_t pc = l->l_cred;
 219         int error;
 220         uid_t buid;
 221         linux32_uid16_t luid;
 222
 223         buid = kauth_cred_getuid(pc);
 224         luid = BSDTOLINUX32_UID(buid);
 225         if ((error = copyout(&luid, SCARG_P32(uap, ruid), sizeof(luid))) != 0)
 226                 return error;
 227
 228         buid = kauth_cred_geteuid(pc);
 229         luid = BSDTOLINUX32_UID(buid);
 230         if ((error = copyout(&luid, SCARG_P32(uap, euid), sizeof(luid))) != 0)
 231                 return error;
 232
 233         buid = kauth_cred_getsvuid(pc);
 234         luid = BSDTOLINUX32_UID(buid);
 235         return (copyout(&luid, SCARG_P32(uap, suid), sizeof(luid)));
 236 }
 237
 238 int
 239 linux32_sys_getresgid16(struct lwp *l, const struct linux32_sys_getresgid16_args *uap, register_t *retval)
 240 {
 241         /* {
 242                 syscallarg(linux32_gid16p_t) rgid;
 243                 syscallarg(linux32_gid16p_t) egid;
 244                 syscallarg(linux32_gid16p_t) sgid;
 245         } */
 246         kauth_cred_t pc = l->l_cred;
 247         int error;
 248         gid_t bgid;
 249         linux32_gid16_t lgid;
 250
 251         bgid = kauth_cred_getgid(pc);
 252         lgid = BSDTOLINUX32_GID(bgid);
 253         if ((error = copyout(&lgid, SCARG_P32(uap, rgid), sizeof(lgid))) != 0)
 254                 return error;
 255
 256         bgid = kauth_cred_getegid(pc);
 257         lgid = BSDTOLINUX32_GID(bgid);
 258         if ((error = copyout(&lgid, SCARG_P32(uap, egid), sizeof(lgid))) != 0)
 259                 return error;
 260
 261         bgid = kauth_cred_getsvgid(pc);
 262         lgid = BSDTOLINUX32_GID(bgid);
 263         return (copyout(&lgid, SCARG_P32(uap, sgid), sizeof(lgid)));
 264 }