linux_file.c revision 39978 
1/*-
2 * Copyright (c) 1994-1995 S�ren Schmidt
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 *    in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software withough specific prior written permission
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 *  $Id: linux_file.c,v 1.21 1998/07/29 16:43:00 bde Exp $
29 */
30
31#include "opt_compat.h"
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/sysproto.h>
36#include <sys/fcntl.h>
37#include <sys/file.h>
38#include <sys/filedesc.h>
39#include <sys/lock.h>
40#include <sys/proc.h>
41#include <sys/vnode.h>
42#include <sys/malloc.h>
43#include <sys/dirent.h>
44#include <sys/conf.h>
45#include <sys/tty.h>
46
47#include <i386/linux/linux.h>
48#include <i386/linux/linux_proto.h>
49#include <i386/linux/linux_util.h>
50
51int
52linux_creat(struct proc *p, struct linux_creat_args *args)
53{
54    struct open_args /* {
55	char *path;
56	int flags;
57	int mode;
58    } */ bsd_open_args;
59    caddr_t sg;
60
61    sg = stackgap_init();
62    CHECKALTCREAT(p, &sg, args->path);
63
64#ifdef DEBUG
65    printf("Linux-emul(%d): creat(%s, %d)\n",
66	   p->p_pid, args->path, args->mode);
67#endif
68    bsd_open_args.path = args->path;
69    bsd_open_args.mode = args->mode;
70    bsd_open_args.flags = O_WRONLY | O_CREAT | O_TRUNC;
71    return open(p, &bsd_open_args);
72}
73
74int
75linux_open(struct proc *p, struct linux_open_args *args)
76{
77    struct open_args /* {
78	char *path;
79	int flags;
80	int mode;
81    } */ bsd_open_args;
82    int error;
83    caddr_t sg;
84
85    sg = stackgap_init();
86
87    if (args->flags & LINUX_O_CREAT)
88	CHECKALTCREAT(p, &sg, args->path);
89    else
90	CHECKALTEXIST(p, &sg, args->path);
91
92#ifdef DEBUG
93    printf("Linux-emul(%d): open(%s, 0x%x, 0x%x)\n",
94	   p->p_pid, args->path, args->flags, args->mode);
95#endif
96    bsd_open_args.flags = 0;
97    if (args->flags & LINUX_O_RDONLY)
98	bsd_open_args.flags |= O_RDONLY;
99    if (args->flags & LINUX_O_WRONLY)
100	bsd_open_args.flags |= O_WRONLY;
101    if (args->flags & LINUX_O_RDWR)
102	bsd_open_args.flags |= O_RDWR;
103    if (args->flags & LINUX_O_NDELAY)
104	bsd_open_args.flags |= O_NONBLOCK;
105    if (args->flags & LINUX_O_APPEND)
106	bsd_open_args.flags |= O_APPEND;
107    if (args->flags & LINUX_O_SYNC)
108	bsd_open_args.flags |= O_FSYNC;
109    if (args->flags & LINUX_O_NONBLOCK)
110	bsd_open_args.flags |= O_NONBLOCK;
111    if (args->flags & LINUX_FASYNC)
112	bsd_open_args.flags |= O_ASYNC;
113    if (args->flags & LINUX_O_CREAT)
114	bsd_open_args.flags |= O_CREAT;
115    if (args->flags & LINUX_O_TRUNC)
116	bsd_open_args.flags |= O_TRUNC;
117    if (args->flags & LINUX_O_EXCL)
118	bsd_open_args.flags |= O_EXCL;
119    if (args->flags & LINUX_O_NOCTTY)
120	bsd_open_args.flags |= O_NOCTTY;
121    bsd_open_args.path = args->path;
122    bsd_open_args.mode = args->mode;
123
124    error = open(p, &bsd_open_args);
125    if (!error && !(bsd_open_args.flags & O_NOCTTY) &&
126	SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
127	struct filedesc *fdp = p->p_fd;
128	struct file *fp = fdp->fd_ofiles[p->p_retval[0]];
129
130	if (fp->f_type == DTYPE_VNODE)
131	    (fp->f_ops->fo_ioctl)(fp, TIOCSCTTY, (caddr_t) 0, p);
132    }
133#ifdef DEBUG
134    printf("Linux-emul(%d): open returns error %d\n",
135	   p->p_pid, error);
136#endif
137    return error;
138}
139
140struct linux_flock {
141    short l_type;
142    short l_whence;
143    linux_off_t l_start;
144    linux_off_t l_len;
145    linux_pid_t l_pid;
146};
147
148static void
149linux_to_bsd_flock(struct linux_flock *linux_flock, struct flock *bsd_flock)
150{
151    switch (linux_flock->l_type) {
152    case LINUX_F_RDLCK:
153	bsd_flock->l_type = F_RDLCK;
154	break;
155    case LINUX_F_WRLCK:
156	bsd_flock->l_type = F_WRLCK;
157	break;
158    case LINUX_F_UNLCK:
159	bsd_flock->l_type = F_UNLCK;
160	break;
161    }
162    bsd_flock->l_whence = linux_flock->l_whence;
163    bsd_flock->l_start = (off_t)linux_flock->l_start;
164    bsd_flock->l_len = (off_t)linux_flock->l_len;
165    bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
166}
167
168static void
169bsd_to_linux_flock(struct flock *bsd_flock, struct linux_flock *linux_flock)
170{
171    switch (bsd_flock->l_type) {
172    case F_RDLCK:
173	linux_flock->l_type = LINUX_F_RDLCK;
174	break;
175    case F_WRLCK:
176	linux_flock->l_type = LINUX_F_WRLCK;
177	break;
178    case F_UNLCK:
179	linux_flock->l_type = LINUX_F_UNLCK;
180	break;
181    }
182    linux_flock->l_whence = bsd_flock->l_whence;
183    linux_flock->l_start = (linux_off_t)bsd_flock->l_start;
184    linux_flock->l_len = (linux_off_t)bsd_flock->l_len;
185    linux_flock->l_pid = (linux_pid_t)bsd_flock->l_pid;
186}
187
188int
189linux_fcntl(struct proc *p, struct linux_fcntl_args *args)
190{
191    int error, result;
192    struct fcntl_args /* {
193	int fd;
194	int cmd;
195	int arg;
196    } */ fcntl_args;
197    struct linux_flock linux_flock;
198    struct flock *bsd_flock;
199    struct filedesc *fdp;
200    struct file *fp;
201    struct vnode *vp;
202    struct vattr va;
203    long pgid;
204    struct pgrp *pgrp;
205    struct tty *tp, *(*d_tty) __P((dev_t));
206    caddr_t sg;
207
208    sg = stackgap_init();
209    bsd_flock = (struct flock *)stackgap_alloc(&sg, sizeof(struct flock));
210    d_tty = NULL;
211
212#ifdef DEBUG
213    printf("Linux-emul(%d): fcntl(%d, %08x, *)\n",
214	   p->p_pid, args->fd, args->cmd);
215#endif
216    fcntl_args.fd = args->fd;
217    fcntl_args.arg = 0;
218
219    switch (args->cmd) {
220    case LINUX_F_DUPFD:
221	fcntl_args.cmd = F_DUPFD;
222	return fcntl(p, &fcntl_args);
223
224    case LINUX_F_GETFD:
225	fcntl_args.cmd = F_GETFD;
226	return fcntl(p, &fcntl_args);
227
228    case LINUX_F_SETFD:
229	fcntl_args.cmd = F_SETFD;
230	return fcntl(p, &fcntl_args);
231
232    case LINUX_F_GETFL:
233	fcntl_args.cmd = F_GETFL;
234	error = fcntl(p, &fcntl_args);
235	result = p->p_retval[0];
236	p->p_retval[0] = 0;
237	if (result & O_RDONLY) p->p_retval[0] |= LINUX_O_RDONLY;
238	if (result & O_WRONLY) p->p_retval[0] |= LINUX_O_WRONLY;
239	if (result & O_RDWR) p->p_retval[0] |= LINUX_O_RDWR;
240	if (result & O_NDELAY) p->p_retval[0] |= LINUX_O_NONBLOCK;
241	if (result & O_APPEND) p->p_retval[0] |= LINUX_O_APPEND;
242	if (result & O_FSYNC) p->p_retval[0] |= LINUX_O_SYNC;
243	if (result & O_ASYNC) p->p_retval[0] |= LINUX_FASYNC;
244	return error;
245
246    case LINUX_F_SETFL:
247	if (args->arg & LINUX_O_NDELAY) fcntl_args.arg |= O_NONBLOCK;
248	if (args->arg & LINUX_O_APPEND) fcntl_args.arg |= O_APPEND;
249	if (args->arg & LINUX_O_SYNC) fcntl_args.arg |= O_FSYNC;
250	if (args->arg & LINUX_FASYNC) fcntl_args.arg |= O_ASYNC;
251	fcntl_args.cmd = F_SETFL;
252	return fcntl(p, &fcntl_args);
253
254    case LINUX_F_GETLK:
255	if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
256		   	    sizeof(struct linux_flock))))
257	    return error;
258	linux_to_bsd_flock(&linux_flock, bsd_flock);
259	fcntl_args.cmd = F_GETLK;
260	fcntl_args.arg = (int)bsd_flock;
261	if (error = fcntl(p, &fcntl_args))
262	    return error;
263	bsd_to_linux_flock(bsd_flock, &linux_flock);
264	return copyout((caddr_t)&linux_flock, (caddr_t)args->arg,
265		       sizeof(struct linux_flock));
266
267    case LINUX_F_SETLK:
268	if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
269		   	    sizeof(struct linux_flock))))
270	    return error;
271	linux_to_bsd_flock(&linux_flock, bsd_flock);
272	fcntl_args.cmd = F_SETLK;
273	fcntl_args.arg = (int)bsd_flock;
274	return fcntl(p, &fcntl_args);
275
276    case LINUX_F_SETLKW:
277	if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
278		   	    sizeof(struct linux_flock))))
279	    return error;
280	linux_to_bsd_flock(&linux_flock, bsd_flock);
281	fcntl_args.cmd = F_SETLKW;
282	fcntl_args.arg = (int)bsd_flock;
283	return fcntl(p, &fcntl_args);
284
285    case LINUX_F_SETOWN:
286    case LINUX_F_GETOWN:
287	/*
288	 * We need to route around the normal fcntl() for these calls,
289	 * since it uses TIOC{G,S}PGRP, which is too restrictive for
290	 * Linux F_{G,S}ETOWN semantics. For sockets, this problem
291	 * does not exist.
292	 */
293	fdp = p->p_fd;
294	if ((u_int)args->fd >= fdp->fd_nfiles ||
295		(fp = fdp->fd_ofiles[args->fd]) == NULL)
296	    return EBADF;
297	if (fp->f_type == DTYPE_SOCKET) {
298	    fcntl_args.cmd = args->cmd == LINUX_F_SETOWN ? F_SETOWN : F_GETOWN;
299    	    fcntl_args.arg = args->arg;
300	    return fcntl(p, &fcntl_args);
301	}
302	vp = (struct vnode *)fp->f_data;
303	if (vp->v_type != VCHR)
304	    return EINVAL;
305	if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)))
306	    return error;
307
308	d_tty = cdevsw[major(va.va_rdev)]->d_devtotty;
309	if (!d_tty || (!(tp = (*d_tty)(va.va_rdev))))
310	    return EINVAL;
311	if (args->cmd == LINUX_F_GETOWN) {
312	    p->p_retval[0] = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
313	    return 0;
314	}
315	if ((long)args->arg <= 0) {
316	    pgid = -(long)args->arg;
317	} else {
318	    struct proc *p1 = pfind((long)args->arg);
319	    if (p1 == 0)
320		return (ESRCH);
321	    pgid = (long)p1->p_pgrp->pg_id;
322	}
323	pgrp = pgfind(pgid);
324	if (pgrp == NULL || pgrp->pg_session != p->p_session)
325	    return EPERM;
326	tp->t_pgrp = pgrp;
327	return 0;
328    }
329    return EINVAL;
330}
331
332int
333linux_lseek(struct proc *p, struct linux_lseek_args *args)
334{
335
336    struct lseek_args /* {
337	int fd;
338	int pad;
339	off_t offset;
340	int whence;
341    } */ tmp_args;
342    int error;
343
344#ifdef DEBUG
345    printf("Linux-emul(%ld): lseek(%d, %ld, %d)\n",
346	   (long)p->p_pid, args->fdes, args->off, args->whence);
347#endif
348    tmp_args.fd = args->fdes;
349    tmp_args.offset = (off_t)args->off;
350    tmp_args.whence = args->whence;
351    error = lseek(p, &tmp_args);
352    return error;
353}
354
355int
356linux_llseek(struct proc *p, struct linux_llseek_args *args)
357{
358	struct lseek_args bsd_args;
359	int error;
360	off_t off;
361
362#ifdef DEBUG
363        printf("Linux-emul(%d): llseek(%d, %d:%d, %d)\n",
364	   p->p_pid, args->fd, args->ohigh, args->olow, args->whence);
365#endif
366	off = (args->olow) | (((off_t) args->ohigh) << 32);
367
368	bsd_args.fd = args->fd;
369	bsd_args.offset = off;
370	bsd_args.whence = args->whence;
371
372	if ((error = lseek(p, &bsd_args)))
373		return error;
374
375	if ((error = copyout(p->p_retval, (caddr_t)args->res, sizeof (off_t))))
376		return error;
377
378	p->p_retval[0] = 0;
379	return 0;
380}
381
382
383struct linux_dirent {
384    long dino;
385    linux_off_t doff;
386    unsigned short dreclen;
387    char dname[LINUX_NAME_MAX + 1];
388};
389
390#define LINUX_RECLEN(de,namlen) \
391    ALIGN((((char *)&(de)->dname - (char *)de) + (namlen) + 1))
392
393int
394linux_readdir(struct proc *p, struct linux_readdir_args *args)
395{
396	struct linux_getdents_args lda;
397
398	lda.fd = args->fd;
399	lda.dent = args->dent;
400	lda.count = 1;
401	return linux_getdents(p, &lda);
402}
403
404int
405linux_getdents(struct proc *p, struct linux_getdents_args *args)
406{
407    register struct dirent *bdp;
408    struct vnode *vp;
409    caddr_t inp, buf;		/* BSD-format */
410    int len, reclen;		/* BSD-format */
411    caddr_t outp;		/* Linux-format */
412    int resid, linuxreclen=0;	/* Linux-format */
413    struct file *fp;
414    struct uio auio;
415    struct iovec aiov;
416    struct vattr va;
417    off_t off;
418    struct linux_dirent linux_dirent;
419    int buflen, error, eofflag, nbytes, justone;
420    u_long *cookies = NULL, *cookiep;
421    int ncookies;
422
423#ifdef DEBUG
424    printf("Linux-emul(%d): getdents(%d, *, %d)\n",
425	   p->p_pid, args->fd, args->count);
426#endif
427    if ((error = getvnode(p->p_fd, args->fd, &fp)) != 0) {
428	return (error);
429    }
430
431    if ((fp->f_flag & FREAD) == 0)
432	return (EBADF);
433
434    vp = (struct vnode *) fp->f_data;
435
436    if (vp->v_type != VDIR)
437	return (EINVAL);
438
439    if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) {
440	return error;
441    }
442
443    nbytes = args->count;
444    if (nbytes == 1) {
445	nbytes = sizeof (struct linux_dirent);
446	justone = 1;
447    }
448    else
449	justone = 0;
450
451    off = fp->f_offset;
452#define	DIRBLKSIZ	512		/* XXX we used to use ufs's DIRBLKSIZ */
453    buflen = max(DIRBLKSIZ, nbytes);
454    buflen = min(buflen, MAXBSIZE);
455    buf = malloc(buflen, M_TEMP, M_WAITOK);
456    vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
457again:
458    aiov.iov_base = buf;
459    aiov.iov_len = buflen;
460    auio.uio_iov = &aiov;
461    auio.uio_iovcnt = 1;
462    auio.uio_rw = UIO_READ;
463    auio.uio_segflg = UIO_SYSSPACE;
464    auio.uio_procp = p;
465    auio.uio_resid = buflen;
466    auio.uio_offset = off;
467
468    if (cookies) {
469	free(cookies, M_TEMP);
470	cookies = NULL;
471    }
472
473    error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies, &cookies);
474    if (error) {
475	goto out;
476    }
477
478    inp = buf;
479    outp = (caddr_t) args->dent;
480    resid = nbytes;
481    if ((len = buflen - auio.uio_resid) <= 0) {
482	goto eof;
483    }
484
485    cookiep = cookies;
486
487    if (cookies) {
488	/*
489	 * When using cookies, the vfs has the option of reading from
490	 * a different offset than that supplied (UFS truncates the
491	 * offset to a block boundary to make sure that it never reads
492	 * partway through a directory entry, even if the directory
493	 * has been compacted).
494	 */
495	while (len > 0 && ncookies > 0 && *cookiep <= off) {
496	    bdp = (struct dirent *) inp;
497	    len -= bdp->d_reclen;
498	    inp += bdp->d_reclen;
499	    cookiep++;
500	    ncookies--;
501	}
502    }
503
504    while (len > 0) {
505	if (cookiep && ncookies == 0)
506	    break;
507	bdp = (struct dirent *) inp;
508	reclen = bdp->d_reclen;
509	if (reclen & 3) {
510	    printf("linux_readdir: reclen=%d\n", reclen);
511	    error = EFAULT;
512	    goto out;
513	}
514
515	if (bdp->d_fileno == 0) {
516	    inp += reclen;
517	    if (cookiep) {
518		off = *cookiep++;
519		ncookies--;
520	    } else
521		off += reclen;
522	    len -= reclen;
523	    continue;
524	}
525	linuxreclen = LINUX_RECLEN(&linux_dirent, bdp->d_namlen);
526	if (reclen > len || resid < linuxreclen) {
527	    outp++;
528	    break;
529	}
530	linux_dirent.dino = (long) bdp->d_fileno;
531	if (justone) {
532	    /*
533	     * old linux-style readdir usage.
534	     */
535	    linux_dirent.doff = (linux_off_t) linuxreclen;
536	    linux_dirent.dreclen = (u_short) bdp->d_namlen;
537	} else {
538	    linux_dirent.doff = (linux_off_t) off;
539	    linux_dirent.dreclen = (u_short) linuxreclen;
540	}
541	strcpy(linux_dirent.dname, bdp->d_name);
542	if ((error = copyout((caddr_t)&linux_dirent, outp, linuxreclen))) {
543	    goto out;
544	}
545	inp += reclen;
546	if (cookiep) {
547	    off = *cookiep++;
548	    ncookies--;
549	} else
550	    off += reclen;
551	outp += linuxreclen;
552	resid -= linuxreclen;
553	len -= reclen;
554	if (justone)
555	    break;
556    }
557
558    if (outp == (caddr_t) args->dent)
559	goto again;
560    fp->f_offset = off;
561
562    if (justone)
563	nbytes = resid + linuxreclen;
564
565eof:
566    p->p_retval[0] = nbytes - resid;
567out:
568    if (cookies)
569	free(cookies, M_TEMP);
570    VOP_UNLOCK(vp, 0, p);
571    free(buf, M_TEMP);
572    return error;
573}
574
575/*
576 * These exist mainly for hooks for doing /compat/linux translation.
577 */
578
579int
580linux_access(struct proc *p, struct linux_access_args *args)
581{
582	struct access_args bsd;
583	caddr_t sg;
584
585	sg = stackgap_init();
586	CHECKALTEXIST(p, &sg, args->path);
587
588#ifdef DEBUG
589        printf("Linux-emul(%d): access(%s, %d)\n",
590	    p->p_pid, args->path, args->flags);
591#endif
592	bsd.path = args->path;
593	bsd.flags = args->flags;
594
595	return access(p, &bsd);
596}
597
598int
599linux_unlink(struct proc *p, struct linux_unlink_args *args)
600{
601	struct unlink_args bsd;
602	caddr_t sg;
603
604	sg = stackgap_init();
605	CHECKALTEXIST(p, &sg, args->path);
606
607#ifdef DEBUG
608	printf("Linux-emul(%d): unlink(%s)\n",
609	   p->p_pid, args->path);
610#endif
611	bsd.path = args->path;
612
613	return unlink(p, &bsd);
614}
615
616int
617linux_chdir(struct proc *p, struct linux_chdir_args *args)
618{
619	struct chdir_args bsd;
620	caddr_t sg;
621
622	sg = stackgap_init();
623	CHECKALTEXIST(p, &sg, args->path);
624
625#ifdef DEBUG
626	printf("Linux-emul(%d): chdir(%s)\n",
627	   p->p_pid, args->path);
628#endif
629	bsd.path = args->path;
630
631	return chdir(p, &bsd);
632}
633
634int
635linux_chmod(struct proc *p, struct linux_chmod_args *args)
636{
637	struct chmod_args bsd;
638	caddr_t sg;
639
640	sg = stackgap_init();
641	CHECKALTEXIST(p, &sg, args->path);
642
643#ifdef DEBUG
644        printf("Linux-emul(%d): chmod(%s, %d)\n",
645	    p->p_pid, args->path, args->mode);
646#endif
647	bsd.path = args->path;
648	bsd.mode = args->mode;
649
650	return chmod(p, &bsd);
651}
652
653int
654linux_chown(struct proc *p, struct linux_chown_args *args)
655{
656	struct chown_args bsd;
657	caddr_t sg;
658
659	sg = stackgap_init();
660	CHECKALTEXIST(p, &sg, args->path);
661
662#ifdef DEBUG
663        printf("Linux-emul(%d): chown(%s, %d, %d)\n",
664	    p->p_pid, args->path, args->uid, args->gid);
665#endif
666	bsd.path = args->path;
667	/* XXX size casts here */
668	bsd.uid = args->uid;
669	bsd.gid = args->gid;
670
671	return chown(p, &bsd);
672}
673
674int
675linux_lchown(struct proc *p, struct linux_lchown_args *args)
676{
677	struct lchown_args bsd;
678	caddr_t sg;
679
680	sg = stackgap_init();
681	CHECKALTEXIST(p, &sg, args->path);
682
683#ifdef DEBUG
684        printf("Linux-emul(%d): lchown(%s, %d, %d)\n",
685	    p->p_pid, args->path, args->uid, args->gid);
686#endif
687	bsd.path = args->path;
688	/* XXX size casts here */
689	bsd.uid = args->uid;
690	bsd.gid = args->gid;
691
692	return lchown(p, &bsd);
693}
694
695int
696linux_mkdir(struct proc *p, struct linux_mkdir_args *args)
697{
698	struct mkdir_args bsd;
699	caddr_t sg;
700
701	sg = stackgap_init();
702	CHECKALTCREAT(p, &sg, args->path);
703
704#ifdef DEBUG
705        printf("Linux-emul(%d): mkdir(%s, %d)\n",
706	    p->p_pid, args->path, args->mode);
707#endif
708	bsd.path = args->path;
709	bsd.mode = args->mode;
710
711	return mkdir(p, &bsd);
712}
713
714int
715linux_rmdir(struct proc *p, struct linux_rmdir_args *args)
716{
717	struct rmdir_args bsd;
718	caddr_t sg;
719
720	sg = stackgap_init();
721	CHECKALTEXIST(p, &sg, args->path);
722
723#ifdef DEBUG
724        printf("Linux-emul(%d): rmdir(%s)\n",
725	    p->p_pid, args->path);
726#endif
727	bsd.path = args->path;
728
729	return rmdir(p, &bsd);
730}
731
732int
733linux_rename(struct proc *p, struct linux_rename_args *args)
734{
735	struct rename_args bsd;
736	caddr_t sg;
737
738	sg = stackgap_init();
739	CHECKALTEXIST(p, &sg, args->from);
740	CHECKALTCREAT(p, &sg, args->to);
741
742#ifdef DEBUG
743        printf("Linux-emul(%d): rename(%s, %s)\n",
744	    p->p_pid, args->from, args->to);
745#endif
746	bsd.from = args->from;
747	bsd.to = args->to;
748
749	return rename(p, &bsd);
750}
751
752int
753linux_symlink(struct proc *p, struct linux_symlink_args *args)
754{
755	struct symlink_args bsd;
756	caddr_t sg;
757
758	sg = stackgap_init();
759	CHECKALTEXIST(p, &sg, args->path);
760	CHECKALTCREAT(p, &sg, args->to);
761
762#ifdef DEBUG
763        printf("Linux-emul(%d): symlink(%s, %s)\n",
764	    p->p_pid, args->path, args->to);
765#endif
766	bsd.path = args->path;
767	bsd.link = args->to;
768
769	return symlink(p, &bsd);
770}
771
772int
773linux_execve(struct proc *p, struct linux_execve_args *args)
774{
775	struct execve_args bsd;
776	caddr_t sg;
777
778	sg = stackgap_init();
779	CHECKALTEXIST(p, &sg, args->path);
780
781#ifdef DEBUG
782        printf("Linux-emul(%d): execve(%s)\n",
783	    p->p_pid, args->path);
784#endif
785	bsd.fname = args->path;
786	bsd.argv = args->argp;
787	bsd.envv = args->envp;
788
789	return execve(p, &bsd);
790}
791
792int
793linux_readlink(struct proc *p, struct linux_readlink_args *args)
794{
795	struct readlink_args bsd;
796	caddr_t sg;
797
798	sg = stackgap_init();
799	CHECKALTEXIST(p, &sg, args->name);
800
801#ifdef DEBUG
802        printf("Linux-emul(%ld): readlink(%s, %p, %d)\n",
803	    (long)p->p_pid, args->name, (void *)args->buf, args->count);
804#endif
805	bsd.path = args->name;
806	bsd.buf = args->buf;
807	bsd.count = args->count;
808
809	return readlink(p, &bsd);
810}
811
812int
813linux_truncate(struct proc *p, struct linux_truncate_args *args)
814{
815	struct otruncate_args bsd;
816	caddr_t sg;
817
818	sg = stackgap_init();
819	CHECKALTEXIST(p, &sg, args->path);
820
821#ifdef DEBUG
822        printf("Linux-emul(%d): truncate(%s, %ld)\n",
823	    p->p_pid, args->path, args->length);
824#endif
825	bsd.path = args->path;
826	bsd.length = args->length;
827
828	return otruncate(p, &bsd);
829}
830
831