/* $OpenBSD: freebsd_file.c,v 1.25 2006/06/25 15:01:53 sturm Exp $ */
/* $NetBSD: freebsd_file.c,v 1.3 1996/05/03 17:03:09 christos Exp $ */
/*
* Copyright (c) 1995 Frank van der Linden
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project
* by Frank van der Linden
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* from: linux_file.c,v 1.3 1995/04/04 04:21:30 mycroft Exp
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/filedesc.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/malloc.h>
#include <sys/syscallargs.h>
#include <compat/freebsd/freebsd_signal.h>
#include <compat/freebsd/freebsd_syscallargs.h>
#include <compat/freebsd/freebsd_util.h>
#define ARRAY_LENGTH(array) (sizeof(array)/sizeof(array[0]))
const char freebsd_emul_path[] = "/emul/freebsd";
static char * convert_from_freebsd_mount_type(int);
void statfs_to_freebsd_statfs(struct proc *, struct mount *, struct statfs *, struct freebsd_statfs *);
struct freebsd_statfs {
long f_spare2; /* placeholder */
long f_bsize; /* fundamental file system block size */
long f_iosize; /* optimal transfer block size */
long f_blocks; /* total data blocks in file system */
long f_bfree; /* free blocks in fs */
long f_bavail; /* free blocks avail to non-superuser */
long f_files; /* total file nodes in file system */
long f_ffree; /* free file nodes in fs */
fsid_t f_fsid; /* file system id */
uid_t f_owner; /* user that mounted the filesystem */
int f_type; /* type of filesystem */
int f_flags; /* copy of mount exported flags */
long f_syncwrites; /* count of sync writes since mount */
long f_asyncwrites; /* count of async writes since mount */
char f_fstypename[MFSNAMELEN]; /* fs type name */
char f_mntonname[MNAMELEN]; /* directory on which mounted */
char f_mntfromname[MNAMELEN];/* mounted filesystem */
};
static char *
convert_from_freebsd_mount_type(type)
int type;
{
static char *freebsd_mount_type[] = {
NULL, /* 0 = MOUNT_NONE */
"ffs", /* 1 = "Fast" Filesystem */
"nfs", /* 2 = Network Filesystem */
"mfs", /* 3 = Memory Filesystem */
"msdos", /* 4 = MSDOS Filesystem */
"lfs", /* 5 = Log-based Filesystem */
"lofs", /* 6 = Loopback filesystem */
"fdesc", /* 7 = File Descriptor Filesystem */
"portal", /* 8 = Portal Filesystem */
"null", /* 9 = Minimal Filesystem Layer */
"umap", /* 10 = User/Group Identifier Remapping Filesystem */
"kernfs", /* 11 = Kernel Information Filesystem */
"procfs", /* 12 = /proc Filesystem */
"afs", /* 13 = Andrew Filesystem */
"cd9660", /* 14 = ISO9660 (aka CDROM) Filesystem */
"union", /* 15 = Union (translucent) Filesystem */
NULL, /* 16 = "devfs" - existing device Filesystem */
#if 0 /* These filesystems don't exist in FreeBSD */
"adosfs", /* ?? = AmigaDOS Filesystem */
#endif
};
if (type < 0 || type >= ARRAY_LENGTH(freebsd_mount_type))
return (NULL);
return (freebsd_mount_type[type]);
}
int
freebsd_sys_mount(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_mount_args /* {
syscallarg(int) type;
syscallarg(char *) path;
syscallarg(int) flags;
syscallarg(caddr_t) data;
} */ *uap = v;
int error;
char *type, *s;
caddr_t sg = stackgap_init(p->p_emul);
struct sys_mount_args bma;
if ((type = convert_from_freebsd_mount_type(SCARG(uap, type))) == NULL)
return ENODEV;
s = stackgap_alloc(&sg, MFSNAMELEN + 1);
if ((error = copyout(type, s, strlen(type) + 1)) != 0)
return error;
SCARG(&bma, type) = s;
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
SCARG(&bma, path) = SCARG(uap, path);
SCARG(&bma, flags) = SCARG(uap, flags);
SCARG(&bma, data) = SCARG(uap, data);
return sys_mount(p, &bma, retval);
}
/*
* The following syscalls are only here because of the alternate path check.
*/
/* XXX - UNIX domain: int freebsd_sys_bind(int s, caddr_t name, int namelen); */
/* XXX - UNIX domain: int freebsd_sys_connect(int s, caddr_t name, int namelen); */
int
freebsd_sys_open(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_open_args /* {
syscallarg(char *) path;
syscallarg(int) flags;
syscallarg(int) mode;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
if (SCARG(uap, flags) & O_CREAT)
FREEBSD_CHECK_ALT_CREAT(p, &sg, SCARG(uap, path));
else
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return sys_open(p, uap, retval);
}
int
compat_43_freebsd_sys_creat(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct compat_43_freebsd_sys_creat_args /* {
syscallarg(char *) path;
syscallarg(int) mode;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_CREAT(p, &sg, SCARG(uap, path));
return compat_43_sys_creat(p, uap, retval);
}
int
freebsd_sys_link(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_link_args /* {
syscallarg(char *) path;
syscallarg(char *) link;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
FREEBSD_CHECK_ALT_CREAT(p, &sg, SCARG(uap, link));
return sys_link(p, uap, retval);
}
int
freebsd_sys_unlink(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_unlink_args /* {
syscallarg(char *) path;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return sys_unlink(p, uap, retval);
}
int
freebsd_sys_chdir(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_chdir_args /* {
syscallarg(char *) path;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return sys_chdir(p, uap, retval);
}
int
freebsd_sys_mknod(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_mknod_args /* {
syscallarg(char *) path;
syscallarg(int) mode;
syscallarg(int) dev;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_CREAT(p, &sg, SCARG(uap, path));
return sys_mknod(p, uap, retval);
}
int
freebsd_sys_chmod(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_chmod_args /* {
syscallarg(char *) path;
syscallarg(int) mode;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return sys_chmod(p, uap, retval);
}
int
freebsd_sys_chown(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_chown_args /* {
syscallarg(char *) path;
syscallarg(int) uid;
syscallarg(int) gid;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return sys_chown(p, uap, retval);
}
int
freebsd_sys_unmount(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_unmount_args /* {
syscallarg(char *) path;
syscallarg(int) flags;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return sys_unmount(p, uap, retval);
}
int
freebsd_sys_access(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_access_args /* {
syscallarg(char *) path;
syscallarg(int) flags;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return sys_access(p, uap, retval);
}
int
freebsd_sys_chflags(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_chflags_args /* {
syscallarg(char *) path;
syscallarg(int) flags;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return sys_chflags(p, uap, retval);
}
int
compat_43_freebsd_sys_stat(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct compat_43_freebsd_sys_stat_args /* {
syscallarg(char *) path;
syscallarg(struct stat43 *) ub;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return compat_43_sys_stat(p, uap, retval);
}
int
compat_43_freebsd_sys_lstat(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct compat_43_freebsd_sys_lstat_args /* {
syscallarg(char *) path;
syscallarg(struct stat43 *) ub;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return compat_43_sys_lstat(p, uap, retval);
}
int
freebsd_sys_revoke(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_revoke_args /* {
syscallarg(char *) path;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return sys_revoke(p, uap, retval);
}
int
freebsd_sys_symlink(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_symlink_args /* {
syscallarg(char *) path;
syscallarg(char *) link;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
FREEBSD_CHECK_ALT_CREAT(p, &sg, SCARG(uap, link));
return sys_symlink(p, uap, retval);
}
int
freebsd_sys_readlink(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_readlink_args /* {
syscallarg(char *) path;
syscallarg(char *) buf;
syscallarg(int) count;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return sys_readlink(p, uap, retval);
}
int
freebsd_sys_execve(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_execve_args /* {
syscallarg(char *) path;
syscallarg(char **) argp;
syscallarg(char **) envp;
} */ *uap = v;
struct sys_execve_args ap;
caddr_t sg;
sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
SCARG(&ap, path) = SCARG(uap, path);
SCARG(&ap, argp) = SCARG(uap, argp);
SCARG(&ap, envp) = SCARG(uap, envp);
return sys_execve(p, &ap, retval);
}
int
freebsd_sys_chroot(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_chroot_args /* {
syscallarg(char *) path;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return sys_chroot(p, uap, retval);
}
int
freebsd_sys_rename(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_rename_args /* {
syscallarg(char *) from;
syscallarg(char *) to;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, from));
FREEBSD_CHECK_ALT_CREAT(p, &sg, SCARG(uap, to));
return sys_rename(p, uap, retval);
}
int
compat_43_freebsd_sys_truncate(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct compat_43_freebsd_sys_truncate_args /* {
syscallarg(char *) path;
syscallarg(long) length;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return compat_43_sys_truncate(p, uap, retval);
}
int
freebsd_sys_mkfifo(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_mkfifo_args /* {
syscallarg(char *) path;
syscallarg(int) mode;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_CREAT(p, &sg, SCARG(uap, path));
return sys_mkfifo(p, uap, retval);
}
int
freebsd_sys_mkdir(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_mkdir_args /* {
syscallarg(char *) path;
syscallarg(int) mode;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_CREAT(p, &sg, SCARG(uap, path));
return sys_mkdir(p, uap, retval);
}
int
freebsd_sys_rmdir(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_rmdir_args /* {
syscallarg(char *) path;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return sys_rmdir(p, uap, retval);
}
/*
* Convert struct statfs -> struct freebsd_statfs
*/
void
statfs_to_freebsd_statfs(p, mp, sp, fsp)
struct proc *p;
struct mount *mp;
struct statfs *sp;
struct freebsd_statfs *fsp;
{
fsp->f_bsize = sp->f_bsize;
fsp->f_iosize = sp->f_iosize;
fsp->f_blocks = sp->f_blocks;
fsp->f_bfree = sp->f_bfree;
fsp->f_bavail = sp->f_bavail;
fsp->f_files = sp->f_files;
fsp->f_ffree = sp->f_ffree;
/* Don't let non-root see filesystem id (for NFS security) */
if (suser(p, 0))
fsp->f_fsid.val[0] = fsp->f_fsid.val[1] = 0;
else
bcopy(&sp->f_fsid, &fsp->f_fsid, sizeof(fsp->f_fsid));
fsp->f_owner = sp->f_owner;
fsp->f_type = mp->mnt_vfc->vfc_typenum;
fsp->f_flags = sp->f_flags;
fsp->f_syncwrites = sp->f_syncwrites;
fsp->f_asyncwrites = sp->f_asyncwrites;
bcopy(sp->f_fstypename, fsp->f_fstypename, MFSNAMELEN);
bcopy(sp->f_mntonname, fsp->f_mntonname, MNAMELEN);
bcopy(sp->f_mntfromname, fsp->f_mntfromname, MNAMELEN);
}
/*
* Get filesystem statistics.
*/
/* ARGSUSED */
int
freebsd_sys_statfs(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct freebsd_sys_statfs_args /* {
syscallarg(char *) path;
syscallarg(struct freebsd_statfs *) buf;
} */ *uap = v;
register struct mount *mp;
register struct statfs *sp;
struct freebsd_statfs fsb;
int error;
struct nameidata nd;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
if ((error = namei(&nd)) != 0)
return (error);
mp = nd.ni_vp->v_mount;
sp = &mp->mnt_stat;
vrele(nd.ni_vp);
if ((error = VFS_STATFS(mp, sp, p)) != 0)
return (error);
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
statfs_to_freebsd_statfs(p, mp, sp, &fsb);
return (copyout((caddr_t)&fsb, (caddr_t)SCARG(uap, buf), sizeof(fsb)));
}
/*
* Get filesystem statistics.
*/
/* ARGSUSED */
int
freebsd_sys_fstatfs(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct freebsd_sys_fstatfs_args /* {
syscallarg(int) fd;
syscallarg(struct freebsd_statfs *) buf;
} */ *uap = v;
struct file *fp;
struct mount *mp;
register struct statfs *sp;
struct freebsd_statfs fsb;
int error;
if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
return (error);
mp = ((struct vnode *)fp->f_data)->v_mount;
sp = &mp->mnt_stat;
error = VFS_STATFS(mp, sp, p);
FRELE(fp);
if (error)
return (error);
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
statfs_to_freebsd_statfs(p, mp, sp, &fsb);
return (copyout((caddr_t)&fsb, (caddr_t)SCARG(uap, buf), sizeof(fsb)));
}
/*
* Get statistics on all filesystems.
*/
int
freebsd_sys_getfsstat(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct freebsd_sys_getfsstat_args /* {
syscallarg(struct freebsd_statfs *) buf;
syscallarg(long) bufsize;
syscallarg(int) flags;
} */ *uap = v;
register struct mount *mp, *nmp;
register struct statfs *sp;
struct freebsd_statfs fsb;
caddr_t sfsp;
long count, maxcount;
int error, flags = SCARG(uap, flags);
maxcount = SCARG(uap, bufsize) / sizeof(struct freebsd_statfs);
sfsp = (caddr_t)SCARG(uap, buf);
count = 0;
for (mp = CIRCLEQ_FIRST(&mountlist); mp != CIRCLEQ_END(&mountlist);
mp = nmp) {
if (vfs_busy(mp, VB_READ|VB_NOWAIT)) {
nmp = CIRCLEQ_NEXT(mp, mnt_list);
continue;
}
if (sfsp && count < maxcount) {
sp = &mp->mnt_stat;
/* Refresh stats unless MNT_NOWAIT is specified */
if (flags != MNT_NOWAIT &&
flags != MNT_LAZY &&
(flags == MNT_WAIT ||
flags == 0) &&
(error = VFS_STATFS(mp, sp, p))) {
nmp = CIRCLEQ_NEXT(mp, mnt_list);
vfs_unbusy(mp);
continue;
}
sp->f_flags = mp->mnt_flag & MNT_VISFLAGMASK;
statfs_to_freebsd_statfs(p, mp, sp, &fsb);
error = copyout((caddr_t)&fsb, sfsp, sizeof(fsb));
if (error) {
vfs_unbusy(mp);
return (error);
}
sfsp += sizeof(fsb);
}
count++;
nmp = CIRCLEQ_NEXT(mp, mnt_list);
vfs_unbusy(mp);
}
if (sfsp && count > maxcount)
*retval = maxcount;
else
*retval = count;
return (0);
}
#ifdef NFSCLIENT
int
freebsd_sys_getfh(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_getfh_args /* {
syscallarg(char *) fname;
syscallarg(fhandle_t *) fhp;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, fname));
return sys_getfh(p, uap, retval);
}
#endif /* NFSCLIENT */
int
freebsd_sys_stat(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_stat_args /* {
syscallarg(char *) path;
syscallarg(struct stat35 *) ub;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return compat_35_sys_stat(p, uap, retval);
}
int
freebsd_sys_lstat(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_lstat_args /* {
syscallarg(char *) path;
syscallarg(struct stat35 *) ub;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return compat_35_sys_lstat(p, uap, retval);
}
int
freebsd_sys_pathconf(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_pathconf_args /* {
syscallarg(char *) path;
syscallarg(int) name;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return sys_pathconf(p, uap, retval);
}
int
freebsd_sys_truncate(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_truncate_args /* {
syscallarg(char *) path;
syscallarg(int) pad;
syscallarg(off_t) length;
} */ *uap = v;
caddr_t sg = stackgap_init(p->p_emul);
FREEBSD_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
return sys_truncate(p, uap, retval);
}
/*
* Just pass on everything to our fcntl, except for F_[GS]ETOWN on pipes,
* where we translate to SIOC[GS]PGRP.
*/
int
freebsd_sys_fcntl(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct freebsd_sys_fcntl_args /* {
syscallarg(int) fd;
syscallarg(int) cmd;
syscallarg(void *) arg;
} */ *uap = v;
int fd, cmd, error;
struct filedesc *fdp;
struct file *fp;
fd = SCARG(uap, fd);
cmd = SCARG(uap, cmd);
switch (cmd) {
case F_GETOWN:
case F_SETOWN:
/* Our pipes does not understand F_[GS]ETOWN. */
fdp = p->p_fd;
if ((fp = fd_getfile(fdp, fd)) == NULL)
return (EBADF);
if (fp->f_type == DTYPE_PIPE) {
FREF(fp);
error = (*fp->f_ops->fo_ioctl)(fp,
cmd == F_GETOWN ? SIOCGPGRP : SIOCSPGRP,
(caddr_t)&SCARG(uap, arg), p);
FRELE(fp);
return (error);
}
break;
}
return (sys_fcntl(p, uap, retval));
}