ibcs2_fcntl.c revision 280258
1/*- 2 * Copyright (c) 1995 Scott Bartram 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 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD: stable/10/sys/i386/ibcs2/ibcs2_fcntl.c 280258 2015-03-19 13:37:36Z rwatson $"); 30 31#include "opt_spx_hack.h" 32 33#include <sys/param.h> 34#include <sys/systm.h> 35#include <sys/capsicum.h> 36#include <sys/fcntl.h> 37#include <sys/file.h> 38#include <sys/filedesc.h> 39#include <sys/lock.h> 40#include <sys/malloc.h> 41#include <sys/mutex.h> 42#include <sys/syscallsubr.h> 43#include <sys/sysproto.h> 44#include <sys/ttycom.h> 45 46#include <i386/ibcs2/ibcs2_fcntl.h> 47#include <i386/ibcs2/ibcs2_signal.h> 48#include <i386/ibcs2/ibcs2_proto.h> 49#include <i386/ibcs2/ibcs2_util.h> 50 51static void cvt_iflock2flock(struct ibcs2_flock *, struct flock *); 52static void cvt_flock2iflock(struct flock *, struct ibcs2_flock *); 53static int cvt_o_flags(int); 54static int oflags2ioflags(int); 55static int ioflags2oflags(int); 56 57static int 58cvt_o_flags(flags) 59 int flags; 60{ 61 int r = 0; 62 63 /* convert mode into NetBSD mode */ 64 if (flags & IBCS2_O_WRONLY) r |= O_WRONLY; 65 if (flags & IBCS2_O_RDWR) r |= O_RDWR; 66 if (flags & (IBCS2_O_NDELAY | IBCS2_O_NONBLOCK)) r |= O_NONBLOCK; 67 if (flags & IBCS2_O_APPEND) r |= O_APPEND; 68 if (flags & IBCS2_O_SYNC) r |= O_FSYNC; 69 if (flags & IBCS2_O_CREAT) r |= O_CREAT; 70 if (flags & IBCS2_O_TRUNC) r |= O_TRUNC /* | O_CREAT ??? */; 71 if (flags & IBCS2_O_EXCL) r |= O_EXCL; 72 if (flags & IBCS2_O_RDONLY) r |= O_RDONLY; 73 if (flags & IBCS2_O_PRIV) r |= O_EXLOCK; 74 if (flags & IBCS2_O_NOCTTY) r |= O_NOCTTY; 75 return r; 76} 77 78static void 79cvt_flock2iflock(flp, iflp) 80 struct flock *flp; 81 struct ibcs2_flock *iflp; 82{ 83 switch (flp->l_type) { 84 case F_RDLCK: 85 iflp->l_type = IBCS2_F_RDLCK; 86 break; 87 case F_WRLCK: 88 iflp->l_type = IBCS2_F_WRLCK; 89 break; 90 case F_UNLCK: 91 iflp->l_type = IBCS2_F_UNLCK; 92 break; 93 } 94 iflp->l_whence = (short)flp->l_whence; 95 iflp->l_start = (ibcs2_off_t)flp->l_start; 96 iflp->l_len = (ibcs2_off_t)flp->l_len; 97 iflp->l_sysid = flp->l_sysid; 98 iflp->l_pid = (ibcs2_pid_t)flp->l_pid; 99} 100 101#ifdef DEBUG_IBCS2 102static void 103print_flock(struct flock *flp) 104{ 105 printf("flock: start=%x len=%x pid=%d type=%d whence=%d\n", 106 (int)flp->l_start, (int)flp->l_len, (int)flp->l_pid, 107 flp->l_type, flp->l_whence); 108} 109#endif 110 111static void 112cvt_iflock2flock(iflp, flp) 113 struct ibcs2_flock *iflp; 114 struct flock *flp; 115{ 116 flp->l_start = (off_t)iflp->l_start; 117 flp->l_len = (off_t)iflp->l_len; 118 flp->l_pid = (pid_t)iflp->l_pid; 119 switch (iflp->l_type) { 120 case IBCS2_F_RDLCK: 121 flp->l_type = F_RDLCK; 122 break; 123 case IBCS2_F_WRLCK: 124 flp->l_type = F_WRLCK; 125 break; 126 case IBCS2_F_UNLCK: 127 flp->l_type = F_UNLCK; 128 break; 129 } 130 flp->l_whence = iflp->l_whence; 131 flp->l_sysid = iflp->l_sysid; 132} 133 134/* convert iBCS2 mode into NetBSD mode */ 135static int 136ioflags2oflags(flags) 137 int flags; 138{ 139 int r = 0; 140 141 if (flags & IBCS2_O_RDONLY) r |= O_RDONLY; 142 if (flags & IBCS2_O_WRONLY) r |= O_WRONLY; 143 if (flags & IBCS2_O_RDWR) r |= O_RDWR; 144 if (flags & IBCS2_O_NDELAY) r |= O_NONBLOCK; 145 if (flags & IBCS2_O_APPEND) r |= O_APPEND; 146 if (flags & IBCS2_O_SYNC) r |= O_FSYNC; 147 if (flags & IBCS2_O_NONBLOCK) r |= O_NONBLOCK; 148 if (flags & IBCS2_O_CREAT) r |= O_CREAT; 149 if (flags & IBCS2_O_TRUNC) r |= O_TRUNC; 150 if (flags & IBCS2_O_EXCL) r |= O_EXCL; 151 if (flags & IBCS2_O_NOCTTY) r |= O_NOCTTY; 152 return r; 153} 154 155/* convert NetBSD mode into iBCS2 mode */ 156static int 157oflags2ioflags(flags) 158 int flags; 159{ 160 int r = 0; 161 162 if (flags & O_RDONLY) r |= IBCS2_O_RDONLY; 163 if (flags & O_WRONLY) r |= IBCS2_O_WRONLY; 164 if (flags & O_RDWR) r |= IBCS2_O_RDWR; 165 if (flags & O_NDELAY) r |= IBCS2_O_NONBLOCK; 166 if (flags & O_APPEND) r |= IBCS2_O_APPEND; 167 if (flags & O_FSYNC) r |= IBCS2_O_SYNC; 168 if (flags & O_NONBLOCK) r |= IBCS2_O_NONBLOCK; 169 if (flags & O_CREAT) r |= IBCS2_O_CREAT; 170 if (flags & O_TRUNC) r |= IBCS2_O_TRUNC; 171 if (flags & O_EXCL) r |= IBCS2_O_EXCL; 172 if (flags & O_NOCTTY) r |= IBCS2_O_NOCTTY; 173 return r; 174} 175 176int 177ibcs2_open(td, uap) 178 struct thread *td; 179 struct ibcs2_open_args *uap; 180{ 181 struct proc *p; 182 char *path; 183 int flags, noctty, ret; 184 185 p = td->td_proc; 186 noctty = uap->flags & IBCS2_O_NOCTTY; 187 flags = cvt_o_flags(uap->flags); 188 if (uap->flags & O_CREAT) 189 CHECKALTCREAT(td, uap->path, &path); 190 else 191 CHECKALTEXIST(td, uap->path, &path); 192 ret = kern_open(td, path, UIO_SYSSPACE, flags, uap->mode); 193 194#ifdef SPX_HACK 195 if (ret == ENXIO) { 196 if (!strcmp(path, "/compat/ibcs2/dev/spx")) 197 ret = spx_open(td); 198 free(path, M_TEMP); 199 } else 200#endif /* SPX_HACK */ 201 free(path, M_TEMP); 202 PROC_LOCK(p); 203 if (!ret && !noctty && SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) { 204 cap_rights_t rights; 205 struct file *fp; 206 int error; 207 208 error = fget(td, td->td_retval[0], 209 cap_rights_init(&rights, CAP_IOCTL), &fp); 210 PROC_UNLOCK(p); 211 if (error) 212 return (EBADF); 213 214 /* ignore any error, just give it a try */ 215 if (fp->f_type == DTYPE_VNODE) 216 fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0, td->td_ucred, 217 td); 218 fdrop(fp, td); 219 } else 220 PROC_UNLOCK(p); 221 return ret; 222} 223 224int 225ibcs2_creat(td, uap) 226 struct thread *td; 227 struct ibcs2_creat_args *uap; 228{ 229 char *path; 230 int error; 231 232 CHECKALTCREAT(td, uap->path, &path); 233 error = kern_open(td, path, UIO_SYSSPACE, O_WRONLY | O_CREAT | O_TRUNC, 234 uap->mode); 235 free(path, M_TEMP); 236 return (error); 237} 238 239int 240ibcs2_access(td, uap) 241 struct thread *td; 242 struct ibcs2_access_args *uap; 243{ 244 char *path; 245 int error; 246 247 CHECKALTEXIST(td, uap->path, &path); 248 error = kern_access(td, path, UIO_SYSSPACE, uap->amode); 249 free(path, M_TEMP); 250 return (error); 251} 252 253int 254ibcs2_fcntl(td, uap) 255 struct thread *td; 256 struct ibcs2_fcntl_args *uap; 257{ 258 intptr_t arg; 259 int error; 260 struct flock fl; 261 struct ibcs2_flock ifl; 262 263 arg = (intptr_t)uap->arg; 264 switch(uap->cmd) { 265 case IBCS2_F_DUPFD: 266 return (kern_fcntl(td, uap->fd, F_DUPFD, arg)); 267 case IBCS2_F_GETFD: 268 return (kern_fcntl(td, uap->fd, F_GETFD, arg)); 269 case IBCS2_F_SETFD: 270 return (kern_fcntl(td, uap->fd, F_SETFD, arg)); 271 case IBCS2_F_GETFL: 272 error = kern_fcntl(td, uap->fd, F_GETFL, arg); 273 if (error) 274 return error; 275 td->td_retval[0] = oflags2ioflags(td->td_retval[0]); 276 return error; 277 case IBCS2_F_SETFL: 278 return (kern_fcntl(td, uap->fd, F_SETFL, 279 ioflags2oflags(arg))); 280 281 case IBCS2_F_GETLK: 282 { 283 error = copyin((caddr_t)uap->arg, (caddr_t)&ifl, 284 ibcs2_flock_len); 285 if (error) 286 return error; 287 cvt_iflock2flock(&ifl, &fl); 288 error = kern_fcntl(td, uap->fd, F_GETLK, (intptr_t)&fl); 289 if (error) 290 return error; 291 cvt_flock2iflock(&fl, &ifl); 292 return copyout((caddr_t)&ifl, (caddr_t)uap->arg, 293 ibcs2_flock_len); 294 } 295 296 case IBCS2_F_SETLK: 297 { 298 error = copyin((caddr_t)uap->arg, (caddr_t)&ifl, 299 ibcs2_flock_len); 300 if (error) 301 return error; 302 cvt_iflock2flock(&ifl, &fl); 303 return (kern_fcntl(td, uap->fd, F_SETLK, (intptr_t)&fl)); 304 } 305 306 case IBCS2_F_SETLKW: 307 { 308 error = copyin((caddr_t)uap->arg, (caddr_t)&ifl, 309 ibcs2_flock_len); 310 if (error) 311 return error; 312 cvt_iflock2flock(&ifl, &fl); 313 return (kern_fcntl(td, uap->fd, F_SETLKW, (intptr_t)&fl)); 314 } 315 } 316 return ENOSYS; 317} 318