linux_file.c revision 31561 
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 1.15 1997/11/06 19:28:54 phk Exp $
29 */
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/sysproto.h>
34#include <sys/fcntl.h>
35#include <sys/file.h>
36#include <sys/filedesc.h>
37#include <sys/lock.h>
38#include <sys/proc.h>
39#include <sys/vnode.h>
40#include <sys/malloc.h>
41#include <sys/dirent.h>
42#include <sys/conf.h>
43#include <sys/tty.h>
44
45#include <i386/linux/linux.h>
46#include <i386/linux/linux_proto.h>
47#include <i386/linux/linux_util.h>
48
49int
50linux_creat(struct proc *p, struct linux_creat_args *args)
51{
52    struct open_args /* {
53	char *path;
54	int flags;
55	int mode;
56    } */ bsd_open_args;
57    caddr_t sg;
58
59    sg = stackgap_init();
60    CHECKALTCREAT(p, &sg, args->path);
61
62#ifdef DEBUG
63    printf("Linux-emul(%d): creat(%s, %d)\n",
64	   p->p_pid, args->path, args->mode);
65#endif
66    bsd_open_args.path = args->path;
67    bsd_open_args.mode = args->mode;
68    bsd_open_args.flags = O_WRONLY | O_CREAT | O_TRUNC;
69    return open(p, &bsd_open_args);
70}
71
72int
73linux_open(struct proc *p, struct linux_open_args *args)
74{
75    struct open_args /* {
76	char *path;
77	int flags;
78	int mode;
79    } */ bsd_open_args;
80    int error;
81    caddr_t sg;
82
83    sg = stackgap_init();
84
85    if (args->flags & LINUX_O_CREAT)
86	CHECKALTCREAT(p, &sg, args->path);
87    else
88	CHECKALTEXIST(p, &sg, args->path);
89
90#ifdef DEBUG
91    printf("Linux-emul(%d): open(%s, 0x%x, 0x%x)\n",
92	   p->p_pid, args->path, args->flags, args->mode);
93#endif
94    bsd_open_args.flags = 0;
95    if (args->flags & LINUX_O_RDONLY)
96	bsd_open_args.flags |= O_RDONLY;
97    if (args->flags & LINUX_O_WRONLY)
98	bsd_open_args.flags |= O_WRONLY;
99    if (args->flags & LINUX_O_RDWR)
100	bsd_open_args.flags |= O_RDWR;
101    if (args->flags & LINUX_O_NDELAY)
102	bsd_open_args.flags |= O_NONBLOCK;
103    if (args->flags & LINUX_O_APPEND)
104	bsd_open_args.flags |= O_APPEND;
105    if (args->flags & LINUX_O_SYNC)
106	bsd_open_args.flags |= O_FSYNC;
107    if (args->flags & LINUX_O_NONBLOCK)
108	bsd_open_args.flags |= O_NONBLOCK;
109    if (args->flags & LINUX_FASYNC)
110	bsd_open_args.flags |= O_ASYNC;
111    if (args->flags & LINUX_O_CREAT)
112	bsd_open_args.flags |= O_CREAT;
113    if (args->flags & LINUX_O_TRUNC)
114	bsd_open_args.flags |= O_TRUNC;
115    if (args->flags & LINUX_O_EXCL)
116	bsd_open_args.flags |= O_EXCL;
117    if (args->flags & LINUX_O_NOCTTY)
118	bsd_open_args.flags |= O_NOCTTY;
119    bsd_open_args.path = args->path;
120    bsd_open_args.mode = args->mode;
121
122    error = open(p, &bsd_open_args);
123    if (!error && !(bsd_open_args.flags & O_NOCTTY) &&
124	SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
125	struct filedesc *fdp = p->p_fd;
126	struct file *fp = fdp->fd_ofiles[p->p_retval[0]];
127
128	if (fp->f_type == DTYPE_VNODE)
129	    (fp->f_ops->fo_ioctl)(fp, TIOCSCTTY, (caddr_t) 0, p);
130    }
131#ifdef DEBUG
132    printf("Linux-emul(%d): open returns error %d\n",
133	   p->p_pid, error);
134#endif
135    return error;
136}
137
138struct linux_flock {
139    short l_type;
140    short l_whence;
141    linux_off_t l_start;
142    linux_off_t l_len;
143    linux_pid_t l_pid;
144};
145
146static void
147linux_to_bsd_flock(struct linux_flock *linux_flock, struct flock *bsd_flock)
148{
149    switch (linux_flock->l_type) {
150    case LINUX_F_RDLCK:
151	bsd_flock->l_type = F_RDLCK;
152	break;
153    case LINUX_F_WRLCK:
154	bsd_flock->l_type = F_WRLCK;
155	break;
156    case LINUX_F_UNLCK:
157	bsd_flock->l_type = F_UNLCK;
158	break;
159    }
160    bsd_flock->l_whence = linux_flock->l_whence;
161    bsd_flock->l_start = (off_t)linux_flock->l_start;
162    bsd_flock->l_len = (off_t)linux_flock->l_len;
163    bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
164}
165
166static void
167bsd_to_linux_flock(struct flock *bsd_flock, struct linux_flock *linux_flock)
168{
169    switch (bsd_flock->l_type) {
170    case F_RDLCK:
171	linux_flock->l_type = LINUX_F_RDLCK;
172	break;
173    case F_WRLCK:
174	linux_flock->l_type = LINUX_F_WRLCK;
175	break;
176    case F_UNLCK:
177	linux_flock->l_type = LINUX_F_UNLCK;
178	break;
179    }
180    linux_flock->l_whence = bsd_flock->l_whence;
181    linux_flock->l_start = (linux_off_t)bsd_flock->l_start;
182    linux_flock->l_len = (linux_off_t)bsd_flock->l_len;
183    linux_flock->l_pid = (linux_pid_t)bsd_flock->l_pid;
184}
185
186int
187linux_fcntl(struct proc *p, struct linux_fcntl_args *args)
188{
189    int error, result;
190    struct fcntl_args /* {
191	int fd;
192	int cmd;
193	int arg;
194    } */ fcntl_args;
195    struct linux_flock linux_flock;
196    struct flock *bsd_flock;
197    struct filedesc *fdp;
198    struct file *fp;
199    struct vnode *vp;
200    struct vattr va;
201    long pgid;
202    struct pgrp *pgrp;
203    struct tty *tp, *(*d_tty) __P((dev_t));
204    caddr_t sg;
205
206    sg = stackgap_init();
207    bsd_flock = (struct flock *)stackgap_alloc(&sg, sizeof(struct flock));
208    d_tty = NULL;
209
210#ifdef DEBUG
211    printf("Linux-emul(%d): fcntl(%d, %08x, *)\n",
212	   p->p_pid, args->fd, args->cmd);
213#endif
214    fcntl_args.fd = args->fd;
215    fcntl_args.arg = 0;
216
217    switch (args->cmd) {
218    case LINUX_F_DUPFD:
219	fcntl_args.cmd = F_DUPFD;
220	return fcntl(p, &fcntl_args);
221
222    case LINUX_F_GETFD:
223	fcntl_args.cmd = F_GETFD;
224	return fcntl(p, &fcntl_args);
225
226    case LINUX_F_SETFD:
227	fcntl_args.cmd = F_SETFD;
228	return fcntl(p, &fcntl_args);
229
230    case LINUX_F_GETFL:
231	fcntl_args.cmd = F_GETFL;
232	error = fcntl(p, &fcntl_args);
233	result = p->p_retval[0];
234	p->p_retval[0] = 0;
235	if (result & O_RDONLY) p->p_retval[0] |= LINUX_O_RDONLY;
236	if (result & O_WRONLY) p->p_retval[0] |= LINUX_O_WRONLY;
237	if (result & O_RDWR) p->p_retval[0] |= LINUX_O_RDWR;
238	if (result & O_NDELAY) p->p_retval[0] |= LINUX_O_NONBLOCK;
239	if (result & O_APPEND) p->p_retval[0] |= LINUX_O_APPEND;
240	if (result & O_FSYNC) p->p_retval[0] |= LINUX_O_SYNC;
241	return error;
242
243    case LINUX_F_SETFL:
244	if (args->arg & LINUX_O_NDELAY) fcntl_args.arg |= O_NONBLOCK;
245	if (args->arg & LINUX_O_APPEND) fcntl_args.arg |= O_APPEND;
246	if (args->arg & LINUX_O_SYNC) fcntl_args.arg |= O_FSYNC;
247	fcntl_args.cmd = F_SETFL;
248	return fcntl(p, &fcntl_args);
249
250    case LINUX_F_GETLK:
251	if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
252		   	    sizeof(struct linux_flock))))
253	    return error;
254	linux_to_bsd_flock(&linux_flock, bsd_flock);
255	fcntl_args.cmd = F_GETLK;
256	fcntl_args.arg = (int)bsd_flock;
257	if (error = fcntl(p, &fcntl_args))
258	    return error;
259	bsd_to_linux_flock(bsd_flock, &linux_flock);
260	return copyout((caddr_t)&linux_flock, (caddr_t)args->arg,
261		       sizeof(struct linux_flock));
262
263    case LINUX_F_SETLK:
264	if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
265		   	    sizeof(struct linux_flock))))
266	    return error;
267	linux_to_bsd_flock(&linux_flock, bsd_flock);
268	fcntl_args.cmd = F_SETLK;
269	fcntl_args.arg = (int)bsd_flock;
270	return fcntl(p, &fcntl_args);
271
272    case LINUX_F_SETLKW:
273	if ((error = copyin((caddr_t)args->arg, (caddr_t)&linux_flock,
274		   	    sizeof(struct linux_flock))))
275	    return error;
276	linux_to_bsd_flock(&linux_flock, bsd_flock);
277	fcntl_args.cmd = F_SETLKW;
278	fcntl_args.arg = (int)bsd_flock;
279	return fcntl(p, &fcntl_args);
280
281    case LINUX_F_SETOWN:
282    case LINUX_F_GETOWN:
283	/*
284	 * We need to route around the normal fcntl() for these calls,
285	 * since it uses TIOC{G,S}PGRP, which is too restrictive for
286	 * Linux F_{G,S}ETOWN semantics. For sockets, this problem
287	 * does not exist.
288	 */
289	fdp = p->p_fd;
290	if ((u_int)args->fd >= fdp->fd_nfiles ||
291		(fp = fdp->fd_ofiles[args->fd]) == NULL)
292	    return EBADF;
293	if (fp->f_type == DTYPE_SOCKET) {
294	    fcntl_args.cmd = args->cmd == LINUX_F_SETOWN ? F_SETOWN : F_GETOWN;
295	    return fcntl(p, &fcntl_args);
296	}
297	vp = (struct vnode *)fp->f_data;
298	if (vp->v_type != VCHR)
299	    return EINVAL;
300	if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)))
301	    return error;
302
303	d_tty = cdevsw[major(va.va_rdev)]->d_devtotty;
304	if (!d_tty || (!(tp = (*d_tty)(va.va_rdev))))
305	    return EINVAL;
306	if (args->cmd == LINUX_F_GETOWN) {
307	    p->p_retval[0] = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
308	    return 0;
309	}
310	if ((long)args->arg <= 0) {
311	    pgid = -(long)args->arg;
312	} else {
313	    struct proc *p1 = pfind((long)args->arg);
314	    if (p1 == 0)
315		return (ESRCH);
316	    pgid = (long)p1->p_pgrp->pg_id;
317	}
318	pgrp = pgfind(pgid);
319	if (pgrp == NULL || pgrp->pg_session != p->p_session)
320	    return EPERM;
321	tp->t_pgrp = pgrp;
322	return 0;
323    }
324    return EINVAL;
325}
326
327int
328linux_lseek(struct proc *p, struct linux_lseek_args *args)
329{
330
331    struct lseek_args /* {
332	int fd;
333	int pad;
334	off_t offset;
335	int whence;
336    } */ tmp_args;
337    int error;
338
339#ifdef DEBUG
340    printf("Linux-emul(%d): lseek(%d, %d, %d)\n",
341	   p->p_pid, args->fdes, args->off, args->whence);
342#endif
343    tmp_args.fd = args->fdes;
344    tmp_args.offset = (off_t)args->off;
345    tmp_args.whence = args->whence;
346    error = lseek(p, &tmp_args);
347    return error;
348}
349
350int
351linux_llseek(struct proc *p, struct linux_llseek_args *args)
352{
353	struct lseek_args bsd_args;
354	int error;
355	off_t off;
356
357#ifdef DEBUG
358        printf("Linux-emul(%d): llseek(%d, %d:%d, %d)\n",
359	   p->p_pid, args->fd, args->ohigh, args->olow, args->whence);
360#endif
361	off = (args->olow) | (((off_t) args->ohigh) << 32);
362
363	bsd_args.fd = args->fd;
364	bsd_args.offset = off;
365	bsd_args.whence = args->whence;
366
367	if ((error = lseek(p, &bsd_args)))
368		return error;
369
370	if ((error = copyout(p->p_retval, (caddr_t)args->res, sizeof (off_t))))
371		return error;
372
373	p->p_retval[0] = 0;
374	return 0;
375}
376
377
378struct linux_dirent {
379    long dino;
380    linux_off_t doff;
381    unsigned short dreclen;
382    char dname[LINUX_NAME_MAX + 1];
383};
384
385#define LINUX_RECLEN(de,namlen) \
386    ALIGN((((char *)&(de)->dname - (char *)de) + (namlen) + 1))
387
388int
389linux_readdir(struct proc *p, struct linux_readdir_args *args)
390{
391	struct linux_getdents_args lda;
392
393	lda.fd = args->fd;
394	lda.dent = args->dent;
395	lda.count = 1;
396	return linux_getdents(p, &lda);
397}
398
399int
400linux_getdents(struct proc *p, struct linux_getdents_args *args)
401{
402    register struct dirent *bdp;
403    struct vnode *vp;
404    caddr_t inp, buf;		/* BSD-format */
405    int len, reclen;		/* BSD-format */
406    caddr_t outp;		/* Linux-format */
407    int resid, linuxreclen=0;	/* Linux-format */
408    struct file *fp;
409    struct uio auio;
410    struct iovec aiov;
411    struct vattr va;
412    off_t off;
413    struct linux_dirent linux_dirent;
414    int buflen, error, eofflag, nbytes, justone;
415    u_long *cookies = NULL, *cookiep;
416    int ncookies;
417
418#ifdef DEBUG
419    printf("Linux-emul(%d): getdents(%d, *, %d)\n",
420	   p->p_pid, args->fd, args->count);
421#endif
422    if ((error = getvnode(p->p_fd, args->fd, &fp)) != 0) {
423	return (error);
424    }
425
426    if ((fp->f_flag & FREAD) == 0)
427	return (EBADF);
428
429    vp = (struct vnode *) fp->f_data;
430
431    if (vp->v_type != VDIR)
432	return (EINVAL);
433
434    if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p))) {
435	return error;
436    }
437
438    nbytes = args->count;
439    if (nbytes == 1) {
440	nbytes = sizeof (struct linux_dirent);
441	justone = 1;
442    }
443    else
444	justone = 0;
445
446    off = fp->f_offset;
447#define	DIRBLKSIZ	512		/* XXX we used to use ufs's DIRBLKSIZ */
448    buflen = max(DIRBLKSIZ, nbytes);
449    buflen = min(buflen, MAXBSIZE);
450    buf = malloc(buflen, M_TEMP, M_WAITOK);
451    vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
452again:
453    aiov.iov_base = buf;
454    aiov.iov_len = buflen;
455    auio.uio_iov = &aiov;
456    auio.uio_iovcnt = 1;
457    auio.uio_rw = UIO_READ;
458    auio.uio_segflg = UIO_SYSSPACE;
459    auio.uio_procp = p;
460    auio.uio_resid = buflen;
461    auio.uio_offset = off;
462
463    if (cookies) {
464	free(cookies, M_TEMP);
465	cookies = NULL;
466    }
467
468    error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &ncookies, &cookies);
469    if (error) {
470	goto out;
471    }
472
473    inp = buf;
474    outp = (caddr_t) args->dent;
475    resid = nbytes;
476    if ((len = buflen - auio.uio_resid) <= 0) {
477	goto eof;
478    }
479
480    cookiep = cookies;
481
482    if (cookies) {
483	/*
484	 * When using cookies, the vfs has the option of reading from
485	 * a different offset than that supplied (UFS truncates the
486	 * offset to a block boundary to make sure that it never reads
487	 * partway through a directory entry, even if the directory
488	 * has been compacted).
489	 */
490	while (len > 0 && ncookies > 0 && *cookiep <= off) {
491	    bdp = (struct dirent *) inp;
492	    len -= bdp->d_reclen;
493	    inp += bdp->d_reclen;
494	    cookiep++;
495	    ncookies--;
496	}
497    }
498
499    while (len > 0) {
500	if (cookiep && ncookies == 0)
501	    break;
502	bdp = (struct dirent *) inp;
503	reclen = bdp->d_reclen;
504	if (reclen & 3) {
505	    printf("linux_readdir: reclen=%d\n", reclen);
506	    error = EFAULT;
507	    goto out;
508	}
509
510	if (bdp->d_fileno == 0) {
511	    inp += reclen;
512	    if (cookiep) {
513		off = *cookiep++;
514		ncookies--;
515	    } else
516		off += reclen;
517	    len -= reclen;
518	    continue;
519	}
520	linuxreclen = LINUX_RECLEN(&linux_dirent, bdp->d_namlen);
521	if (reclen > len || resid < linuxreclen) {
522	    outp++;
523	    break;
524	}
525	linux_dirent.dino = (long) bdp->d_fileno;
526	if (justone) {
527	    /*
528	     * old linux-style readdir usage.
529	     */
530	    linux_dirent.doff = (linux_off_t) linuxreclen;
531	    linux_dirent.dreclen = (u_short) bdp->d_namlen;
532	} else {
533	    linux_dirent.doff = (linux_off_t) off;
534	    linux_dirent.dreclen = (u_short) linuxreclen;
535	}
536	strcpy(linux_dirent.dname, bdp->d_name);
537	if ((error = copyout((caddr_t)&linux_dirent, outp, linuxreclen))) {
538	    goto out;
539	}
540	inp += reclen;
541	if (cookiep) {
542	    off = *cookiep++;
543	    ncookies--;
544	} else
545	    off += reclen;
546	outp += linuxreclen;
547	resid -= linuxreclen;
548	len -= reclen;
549	if (justone)
550	    break;
551    }
552
553    if (outp == (caddr_t) args->dent)
554	goto again;
555    fp->f_offset = off;
556
557    if (justone)
558	nbytes = resid + linuxreclen;
559
560eof:
561    p->p_retval[0] = nbytes - resid;
562out:
563    if (cookies)
564	free(cookies, M_TEMP);
565    VOP_UNLOCK(vp, 0, p);
566    free(buf, M_TEMP);
567    return error;
568}
569
570/*
571 * These exist mainly for hooks for doing /compat/linux translation.
572 */
573
574int
575linux_access(struct proc *p, struct linux_access_args *args)
576{
577	struct access_args bsd;
578	caddr_t sg;
579
580	sg = stackgap_init();
581	CHECKALTEXIST(p, &sg, args->path);
582
583#ifdef DEBUG
584        printf("Linux-emul(%d): access(%s, %d)\n",
585	    p->p_pid, args->path, args->flags);
586#endif
587	bsd.path = args->path;
588	bsd.flags = args->flags;
589
590	return access(p, &bsd);
591}
592
593int
594linux_unlink(struct proc *p, struct linux_unlink_args *args)
595{
596	struct unlink_args bsd;
597	caddr_t sg;
598
599	sg = stackgap_init();
600	CHECKALTEXIST(p, &sg, args->path);
601
602#ifdef DEBUG
603	printf("Linux-emul(%d): unlink(%s)\n",
604	   p->p_pid, args->path);
605#endif
606	bsd.path = args->path;
607
608	return unlink(p, &bsd);
609}
610
611int
612linux_chdir(struct proc *p, struct linux_chdir_args *args)
613{
614	struct chdir_args bsd;
615	caddr_t sg;
616
617	sg = stackgap_init();
618	CHECKALTEXIST(p, &sg, args->path);
619
620#ifdef DEBUG
621	printf("Linux-emul(%d): chdir(%s)\n",
622	   p->p_pid, args->path);
623#endif
624	bsd.path = args->path;
625
626	return chdir(p, &bsd);
627}
628
629int
630linux_chmod(struct proc *p, struct linux_chmod_args *args)
631{
632	struct chmod_args bsd;
633	caddr_t sg;
634
635	sg = stackgap_init();
636	CHECKALTEXIST(p, &sg, args->path);
637
638#ifdef DEBUG
639        printf("Linux-emul(%d): chmod(%s, %d)\n",
640	    p->p_pid, args->path, args->mode);
641#endif
642	bsd.path = args->path;
643	bsd.mode = args->mode;
644
645	return chmod(p, &bsd);
646}
647
648int
649linux_chown(struct proc *p, struct linux_chown_args *args)
650{
651	struct chown_args bsd;
652	caddr_t sg;
653
654	sg = stackgap_init();
655	CHECKALTEXIST(p, &sg, args->path);
656
657#ifdef DEBUG
658        printf("Linux-emul(%d): chown(%s, %d, %d)\n",
659	    p->p_pid, args->path, args->uid, args->gid);
660#endif
661	bsd.path = args->path;
662	/* XXX size casts here */
663	bsd.uid = args->uid;
664	bsd.gid = args->gid;
665
666	return chown(p, &bsd);
667}
668
669int
670linux_mkdir(struct proc *p, struct linux_mkdir_args *args)
671{
672	struct mkdir_args bsd;
673	caddr_t sg;
674
675	sg = stackgap_init();
676	CHECKALTCREAT(p, &sg, args->path);
677
678#ifdef DEBUG
679        printf("Linux-emul(%d): mkdir(%s, %d)\n",
680	    p->p_pid, args->path, args->mode);
681#endif
682	bsd.path = args->path;
683	bsd.mode = args->mode;
684
685	return mkdir(p, &bsd);
686}
687
688int
689linux_rmdir(struct proc *p, struct linux_rmdir_args *args)
690{
691	struct rmdir_args bsd;
692	caddr_t sg;
693
694	sg = stackgap_init();
695	CHECKALTEXIST(p, &sg, args->path);
696
697#ifdef DEBUG
698        printf("Linux-emul(%d): rmdir(%s)\n",
699	    p->p_pid, args->path);
700#endif
701	bsd.path = args->path;
702
703	return rmdir(p, &bsd);
704}
705
706int
707linux_rename(struct proc *p, struct linux_rename_args *args)
708{
709	struct rename_args bsd;
710	caddr_t sg;
711
712	sg = stackgap_init();
713	CHECKALTEXIST(p, &sg, args->from);
714	CHECKALTCREAT(p, &sg, args->to);
715
716#ifdef DEBUG
717        printf("Linux-emul(%d): rename(%s, %s)\n",
718	    p->p_pid, args->from, args->to);
719#endif
720	bsd.from = args->from;
721	bsd.to = args->to;
722
723	return rename(p, &bsd);
724}
725
726int
727linux_symlink(struct proc *p, struct linux_symlink_args *args)
728{
729	struct symlink_args bsd;
730	caddr_t sg;
731
732	sg = stackgap_init();
733	CHECKALTEXIST(p, &sg, args->path);
734	CHECKALTCREAT(p, &sg, args->to);
735
736#ifdef DEBUG
737        printf("Linux-emul(%d): symlink(%s, %s)\n",
738	    p->p_pid, args->path, args->to);
739#endif
740	bsd.path = args->path;
741	bsd.link = args->to;
742
743	return symlink(p, &bsd);
744}
745
746int
747linux_execve(struct proc *p, struct linux_execve_args *args)
748{
749	struct execve_args bsd;
750	caddr_t sg;
751
752	sg = stackgap_init();
753	CHECKALTEXIST(p, &sg, args->path);
754
755#ifdef DEBUG
756        printf("Linux-emul(%d): execve(%s)\n",
757	    p->p_pid, args->path);
758#endif
759	bsd.fname = args->path;
760	bsd.argv = args->argp;
761	bsd.envv = args->envp;
762
763	return execve(p, &bsd);
764}
765
766int
767linux_readlink(struct proc *p, struct linux_readlink_args *args)
768{
769	struct readlink_args bsd;
770	caddr_t sg;
771
772	sg = stackgap_init();
773	CHECKALTEXIST(p, &sg, args->name);
774
775#ifdef DEBUG
776        printf("Linux-emul(%d): readlink(%s, 0x%x, %d)\n",
777	    p->p_pid, args->name, args->buf, args->count);
778#endif
779	bsd.path = args->name;
780	bsd.buf = args->buf;
781	bsd.count = args->count;
782
783	return readlink(p, &bsd);
784}
785
786int
787linux_truncate(struct proc *p, struct linux_truncate_args *args)
788{
789	struct otruncate_args bsd;
790	caddr_t sg;
791
792	sg = stackgap_init();
793	CHECKALTEXIST(p, &sg, args->path);
794
795#ifdef DEBUG
796        printf("Linux-emul(%d): truncate(%s)\n",
797	    p->p_pid, args->path);
798#endif
799	bsd.path = args->path;
800
801	return otruncate(p, &bsd);
802}
803
804