Annotation of sys/compat/ibcs2/ibcs2_fcntl.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ibcs2_fcntl.c,v 1.9 2002/03/14 01:26:50 millert Exp $ */
! 2: /* $NetBSD: ibcs2_fcntl.c,v 1.6 1996/05/03 17:05:20 christos Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1997 Theo de Raadt
! 6: * Copyright (c) 1995 Scott Bartram
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: * 2. Redistributions in binary form must reproduce the above copyright
! 15: * notice, this list of conditions and the following disclaimer in the
! 16: * documentation and/or other materials provided with the distribution.
! 17: * 3. The name of the author may not be used to endorse or promote products
! 18: * derived from this software without specific prior written permission
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 21: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 22: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 23: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 24: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 25: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 26: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 27: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 28: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 29: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 30: */
! 31:
! 32: #include <sys/param.h>
! 33: #include <sys/systm.h>
! 34: #include <sys/namei.h>
! 35: #include <sys/proc.h>
! 36: #include <sys/file.h>
! 37: #include <sys/stat.h>
! 38: #include <sys/filedesc.h>
! 39: #include <sys/ioctl.h>
! 40: #include <sys/kernel.h>
! 41: #include <sys/mount.h>
! 42: #include <sys/malloc.h>
! 43: #include <sys/syscallargs.h>
! 44: #include <sys/vnode.h>
! 45:
! 46: #include <compat/ibcs2/ibcs2_types.h>
! 47: #include <compat/ibcs2/ibcs2_fcntl.h>
! 48: #include <compat/ibcs2/ibcs2_unistd.h>
! 49: #include <compat/ibcs2/ibcs2_signal.h>
! 50: #include <compat/ibcs2/ibcs2_syscallargs.h>
! 51: #include <compat/ibcs2/ibcs2_util.h>
! 52:
! 53: static int cvt_o_flags(int);
! 54: static void cvt_flock2iflock(struct flock *, struct ibcs2_flock *);
! 55: static void cvt_iflock2flock(struct ibcs2_flock *, struct flock *);
! 56: static int ioflags2oflags(int);
! 57: static int oflags2ioflags(int);
! 58:
! 59: static int
! 60: cvt_o_flags(flags)
! 61: int flags;
! 62: {
! 63: int r = 0;
! 64:
! 65: /* convert mode into NetBSD mode */
! 66: if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
! 67: if (flags & IBCS2_O_RDWR) r |= O_RDWR;
! 68: if (flags & (IBCS2_O_NDELAY | IBCS2_O_NONBLOCK)) r |= O_NONBLOCK;
! 69: if (flags & IBCS2_O_APPEND) r |= O_APPEND;
! 70: if (flags & IBCS2_O_SYNC) r |= O_SYNC;
! 71: if (flags & IBCS2_O_CREAT) r |= O_CREAT;
! 72: if (flags & IBCS2_O_TRUNC) r |= O_TRUNC;
! 73: if (flags & IBCS2_O_EXCL) r |= O_EXCL;
! 74: return r;
! 75: }
! 76:
! 77: static void
! 78: cvt_flock2iflock(flp, iflp)
! 79: struct flock *flp;
! 80: struct ibcs2_flock *iflp;
! 81: {
! 82: switch (flp->l_type) {
! 83: case F_RDLCK:
! 84: iflp->l_type = IBCS2_F_RDLCK;
! 85: break;
! 86: case F_WRLCK:
! 87: iflp->l_type = IBCS2_F_WRLCK;
! 88: break;
! 89: case F_UNLCK:
! 90: iflp->l_type = IBCS2_F_UNLCK;
! 91: break;
! 92: }
! 93: iflp->l_whence = (short)flp->l_whence;
! 94: iflp->l_start = (ibcs2_off_t)flp->l_start;
! 95: iflp->l_len = (ibcs2_off_t)flp->l_len;
! 96: iflp->l_sysid = 0;
! 97: iflp->l_pid = (ibcs2_pid_t)flp->l_pid;
! 98: }
! 99:
! 100: static void
! 101: cvt_iflock2flock(iflp, flp)
! 102: struct ibcs2_flock *iflp;
! 103: struct flock *flp;
! 104: {
! 105: flp->l_start = (off_t)iflp->l_start;
! 106: flp->l_len = (off_t)iflp->l_len;
! 107: flp->l_pid = (pid_t)iflp->l_pid;
! 108: switch (iflp->l_type) {
! 109: case IBCS2_F_RDLCK:
! 110: flp->l_type = F_RDLCK;
! 111: break;
! 112: case IBCS2_F_WRLCK:
! 113: flp->l_type = F_WRLCK;
! 114: break;
! 115: case IBCS2_F_UNLCK:
! 116: flp->l_type = F_UNLCK;
! 117: break;
! 118: }
! 119: flp->l_whence = iflp->l_whence;
! 120: }
! 121:
! 122: /* convert iBCS2 mode into NetBSD mode */
! 123: static int
! 124: ioflags2oflags(flags)
! 125: int flags;
! 126: {
! 127: int r = 0;
! 128:
! 129: if (flags & IBCS2_O_RDONLY) r |= O_RDONLY;
! 130: if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
! 131: if (flags & IBCS2_O_RDWR) r |= O_RDWR;
! 132: if (flags & IBCS2_O_NDELAY) r |= O_NONBLOCK;
! 133: if (flags & IBCS2_O_APPEND) r |= O_APPEND;
! 134: if (flags & IBCS2_O_SYNC) r |= O_SYNC;
! 135: if (flags & IBCS2_O_NONBLOCK) r |= O_NONBLOCK;
! 136: if (flags & IBCS2_O_CREAT) r |= O_CREAT;
! 137: if (flags & IBCS2_O_TRUNC) r |= O_TRUNC;
! 138: if (flags & IBCS2_O_EXCL) r |= O_EXCL;
! 139: if (flags & IBCS2_O_NOCTTY) r |= O_NOCTTY;
! 140: return r;
! 141: }
! 142:
! 143: /* convert NetBSD mode into iBCS2 mode */
! 144: static int
! 145: oflags2ioflags(flags)
! 146: int flags;
! 147: {
! 148: int r = 0;
! 149:
! 150: if (flags & O_RDONLY) r |= IBCS2_O_RDONLY;
! 151: if (flags & O_WRONLY) r |= IBCS2_O_WRONLY;
! 152: if (flags & O_RDWR) r |= IBCS2_O_RDWR;
! 153: if (flags & O_NDELAY) r |= IBCS2_O_NONBLOCK;
! 154: if (flags & O_APPEND) r |= IBCS2_O_APPEND;
! 155: if (flags & O_SYNC) r |= IBCS2_O_SYNC;
! 156: if (flags & O_NONBLOCK) r |= IBCS2_O_NONBLOCK;
! 157: if (flags & O_CREAT) r |= IBCS2_O_CREAT;
! 158: if (flags & O_TRUNC) r |= IBCS2_O_TRUNC;
! 159: if (flags & O_EXCL) r |= IBCS2_O_EXCL;
! 160: if (flags & O_NOCTTY) r |= IBCS2_O_NOCTTY;
! 161: return r;
! 162: }
! 163:
! 164: int
! 165: ibcs2_sys_open(p, v, retval)
! 166: struct proc *p;
! 167: void *v;
! 168: register_t *retval;
! 169: {
! 170: struct ibcs2_sys_open_args /* {
! 171: syscallarg(char *) path;
! 172: syscallarg(int) flags;
! 173: syscallarg(int) mode;
! 174: } */ *uap = v;
! 175: int noctty = SCARG(uap, flags) & IBCS2_O_NOCTTY;
! 176: int ret;
! 177: caddr_t sg = stackgap_init(p->p_emul);
! 178:
! 179: SCARG(uap, flags) = cvt_o_flags(SCARG(uap, flags));
! 180: if (SCARG(uap, flags) & O_CREAT)
! 181: IBCS2_CHECK_ALT_CREAT(p, &sg, SCARG(uap, path));
! 182: else
! 183: IBCS2_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
! 184: ret = sys_open(p, uap, retval);
! 185:
! 186: if (!ret && !noctty && SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
! 187: struct filedesc *fdp = p->p_fd;
! 188: struct file *fp;
! 189:
! 190: if ((fp = fd_getfile(fdp, *retval)) == NULL)
! 191: return EBADF;
! 192: FREF(fp);
! 193: if (fp->f_type == DTYPE_VNODE)
! 194: (fp->f_ops->fo_ioctl)(fp, TIOCSCTTY, (caddr_t) 0, p);
! 195: FRELE(fp);
! 196: }
! 197: return ret;
! 198: }
! 199:
! 200: int
! 201: ibcs2_sys_creat(p, v, retval)
! 202: struct proc *p;
! 203: void *v;
! 204: register_t *retval;
! 205: {
! 206: struct ibcs2_sys_creat_args /* {
! 207: syscallarg(char *) path;
! 208: syscallarg(int) mode;
! 209: } */ *uap = v;
! 210: struct sys_open_args cup;
! 211: caddr_t sg = stackgap_init(p->p_emul);
! 212:
! 213: IBCS2_CHECK_ALT_CREAT(p, &sg, SCARG(uap, path));
! 214: SCARG(&cup, path) = SCARG(uap, path);
! 215: SCARG(&cup, mode) = SCARG(uap, mode);
! 216: SCARG(&cup, flags) = O_WRONLY | O_CREAT | O_TRUNC;
! 217: return sys_open(p, &cup, retval);
! 218: }
! 219:
! 220: int
! 221: ibcs2_sys_access(p, v, retval)
! 222: struct proc *p;
! 223: void *v;
! 224: register_t *retval;
! 225: {
! 226: struct ibcs2_sys_access_args /* {
! 227: syscallarg(char *) path;
! 228: syscallarg(int) flags;
! 229: } */ *uap = v;
! 230: struct sys_access_args cup;
! 231: caddr_t sg = stackgap_init(p->p_emul);
! 232:
! 233: IBCS2_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
! 234: SCARG(&cup, path) = SCARG(uap, path);
! 235: SCARG(&cup, flags) = SCARG(uap, flags);
! 236: return sys_access(p, &cup, retval);
! 237: }
! 238:
! 239: int
! 240: ibcs2_sys_eaccess(p, v, retval)
! 241: struct proc *p;
! 242: void *v;
! 243: register_t *retval;
! 244: {
! 245: register struct ibcs2_sys_eaccess_args /* {
! 246: syscallarg(char *) path;
! 247: syscallarg(int) flags;
! 248: } */ *uap = v;
! 249: register struct ucred *cred = p->p_ucred;
! 250: register struct vnode *vp;
! 251: int error, flags;
! 252: struct nameidata nd;
! 253: caddr_t sg = stackgap_init(p->p_emul);
! 254:
! 255: IBCS2_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
! 256:
! 257: NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
! 258: SCARG(uap, path), p);
! 259: if ((error = namei(&nd)) != 0)
! 260: return error;
! 261: vp = nd.ni_vp;
! 262:
! 263: /* Flags == 0 means only check for existence. */
! 264: if (SCARG(uap, flags)) {
! 265: flags = 0;
! 266: if (SCARG(uap, flags) & IBCS2_R_OK)
! 267: flags |= VREAD;
! 268: if (SCARG(uap, flags) & IBCS2_W_OK)
! 269: flags |= VWRITE;
! 270: if (SCARG(uap, flags) & IBCS2_X_OK)
! 271: flags |= VEXEC;
! 272: if ((flags & VWRITE) == 0 || (error = vn_writechk(vp)) == 0)
! 273: error = VOP_ACCESS(vp, flags, cred, p);
! 274: }
! 275: vput(vp);
! 276: return error;
! 277: }
! 278:
! 279: int
! 280: ibcs2_sys_fcntl(p, v, retval)
! 281: struct proc *p;
! 282: void *v;
! 283: register_t *retval;
! 284: {
! 285: struct ibcs2_sys_fcntl_args /* {
! 286: syscallarg(int) fd;
! 287: syscallarg(int) cmd;
! 288: syscallarg(char *) arg;
! 289: } */ *uap = v;
! 290: int error;
! 291: struct sys_fcntl_args fa;
! 292: struct flock *flp;
! 293: struct ibcs2_flock ifl;
! 294:
! 295: switch(SCARG(uap, cmd)) {
! 296: case IBCS2_F_DUPFD:
! 297: SCARG(&fa, fd) = SCARG(uap, fd);
! 298: SCARG(&fa, cmd) = F_DUPFD;
! 299: SCARG(&fa, arg) = SCARG(uap, arg);
! 300: return sys_fcntl(p, &fa, retval);
! 301: case IBCS2_F_GETFD:
! 302: SCARG(&fa, fd) = SCARG(uap, fd);
! 303: SCARG(&fa, cmd) = F_GETFD;
! 304: SCARG(&fa, arg) = SCARG(uap, arg);
! 305: return sys_fcntl(p, &fa, retval);
! 306: case IBCS2_F_SETFD:
! 307: SCARG(&fa, fd) = SCARG(uap, fd);
! 308: SCARG(&fa, cmd) = F_SETFD;
! 309: SCARG(&fa, arg) = SCARG(uap, arg);
! 310: return sys_fcntl(p, &fa, retval);
! 311: case IBCS2_F_GETFL:
! 312: SCARG(&fa, fd) = SCARG(uap, fd);
! 313: SCARG(&fa, cmd) = F_GETFL;
! 314: SCARG(&fa, arg) = SCARG(uap, arg);
! 315: error = sys_fcntl(p, &fa, retval);
! 316: if (error)
! 317: return error;
! 318: *retval = oflags2ioflags(*retval);
! 319: return error;
! 320: case IBCS2_F_SETFL:
! 321: SCARG(&fa, fd) = SCARG(uap, fd);
! 322: SCARG(&fa, cmd) = F_SETFL;
! 323: SCARG(&fa, arg) = (void *)ioflags2oflags((int) SCARG(uap, arg));
! 324: return sys_fcntl(p, &fa, retval);
! 325:
! 326: case IBCS2_F_GETLK:
! 327: {
! 328: caddr_t sg = stackgap_init(p->p_emul);
! 329: flp = stackgap_alloc(&sg, sizeof(*flp));
! 330: error = copyin((caddr_t)SCARG(uap, arg), (caddr_t)&ifl,
! 331: ibcs2_flock_len);
! 332: if (error)
! 333: return error;
! 334: cvt_iflock2flock(&ifl, flp);
! 335: SCARG(&fa, fd) = SCARG(uap, fd);
! 336: SCARG(&fa, cmd) = F_GETLK;
! 337: SCARG(&fa, arg) = (void *)flp;
! 338: error = sys_fcntl(p, &fa, retval);
! 339: if (error)
! 340: return error;
! 341: cvt_flock2iflock(flp, &ifl);
! 342: return copyout((caddr_t)&ifl, (caddr_t)SCARG(uap, arg),
! 343: ibcs2_flock_len);
! 344: }
! 345:
! 346: case IBCS2_F_SETLK:
! 347: {
! 348: caddr_t sg = stackgap_init(p->p_emul);
! 349: flp = stackgap_alloc(&sg, sizeof(*flp));
! 350: error = copyin((caddr_t)SCARG(uap, arg), (caddr_t)&ifl,
! 351: ibcs2_flock_len);
! 352: if (error)
! 353: return error;
! 354: cvt_iflock2flock(&ifl, flp);
! 355: SCARG(&fa, fd) = SCARG(uap, fd);
! 356: SCARG(&fa, cmd) = F_SETLK;
! 357: SCARG(&fa, arg) = (void *)flp;
! 358: return sys_fcntl(p, &fa, retval);
! 359: }
! 360:
! 361: case IBCS2_F_SETLKW:
! 362: {
! 363: caddr_t sg = stackgap_init(p->p_emul);
! 364: flp = stackgap_alloc(&sg, sizeof(*flp));
! 365: error = copyin((caddr_t)SCARG(uap, arg), (caddr_t)&ifl,
! 366: ibcs2_flock_len);
! 367: if (error)
! 368: return error;
! 369: cvt_iflock2flock(&ifl, flp);
! 370: SCARG(&fa, fd) = SCARG(uap, fd);
! 371: SCARG(&fa, cmd) = F_SETLKW;
! 372: SCARG(&fa, arg) = (void *)flp;
! 373: return sys_fcntl(p, &fa, retval);
! 374: }
! 375: case IBCS2_F_FREESP:
! 376: {
! 377: struct ibcs2_flock ifl;
! 378: off_t off, cur;
! 379: caddr_t sg = stackgap_init(p->p_emul);
! 380: struct sys_fstat_args ofst;
! 381: struct stat ost;
! 382: struct sys_lseek_args ols;
! 383: struct sys_ftruncate_args /* {
! 384: syscallarg(int) fd;
! 385: syscallarg(int) pad;
! 386: syscallarg(off_t) length;
! 387: } */ nuap;
! 388:
! 389: error = copyin(SCARG(uap, arg), &ifl, sizeof ifl);
! 390: if (error)
! 391: return error;
! 392:
! 393: SCARG(&ofst, fd) = SCARG(uap, fd);
! 394: SCARG(&ofst, sb) = stackgap_alloc(&sg,
! 395: sizeof(struct stat));
! 396: if ((error = sys_fstat(p, &ofst, retval)) != 0)
! 397: return error;
! 398: if ((error = copyin(SCARG(&ofst, sb), &ost,
! 399: sizeof ost)) != 0)
! 400: return error;
! 401:
! 402: SCARG(&ols, fd) = SCARG(uap, fd);
! 403: SCARG(&ols, whence) = SEEK_CUR;
! 404: SCARG(&ols, offset) = 0;
! 405: if ((error = sys_lseek(p, &ols, (register_t *)&cur)) != 0)
! 406: return error;
! 407:
! 408: off = (off_t)ifl.l_start;
! 409: switch (ifl.l_whence) {
! 410: case 0:
! 411: off = (off_t)ifl.l_start;
! 412: break;
! 413: case 1:
! 414: off = ost.st_size + (off_t)ifl.l_start;
! 415: break;
! 416: case 2:
! 417: off = cur - (off_t)ifl.l_start;
! 418: break;
! 419: default:
! 420: return EINVAL;
! 421: }
! 422:
! 423: if (ifl.l_len != 0 && off + ifl.l_len != ost.st_size)
! 424: return EINVAL; /* Sorry, cannot truncate in middle */
! 425:
! 426: SCARG(&nuap, fd) = SCARG(uap, fd);
! 427: SCARG(&nuap, length) = off;
! 428: return (sys_ftruncate(p, &nuap, retval));
! 429: }
! 430: }
! 431: return ENOSYS;
! 432: }
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