SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group)
{
struct file * file;
int error = -EBADF;
struct dentry * dentry;
file = fget(fd);
if (!file)
goto out;
error = mnt_want_write_file(file);
if (error)
goto out_fput;
dentry = file->f_path.dentry;
audit_inode(NULL, dentry);
error = chown_common(&file->f_path, user, group);
mnt_drop_write(file->f_path.mnt);
out_fput:
fput(file);
out:
return error;
}
asmlinkage int sunos_getdents(unsigned int fd, void __user *dirent, int cnt)
{
struct file * file;
struct sunos_dirent __user *lastdirent;
struct sunos_dirent_callback buf;
int error = -EBADF;
if (fd >= SUNOS_NR_OPEN)
goto out;
file = fget(fd);
if (!file)
goto out;
error = -EINVAL;
if (cnt < (sizeof(struct sunos_dirent) + 255))
goto out_putf;
buf.curr = (struct sunos_dirent __user *) dirent;
buf.previous = NULL;
buf.count = cnt;
buf.error = 0;
error = vfs_readdir(file, sunos_filldir, &buf);
if (error < 0)
goto out_putf;
lastdirent = buf.previous;
error = buf.error;
if (lastdirent) {
put_user(file->f_pos, &lastdirent->d_off);
error = cnt - buf.count;
}
out_putf:
fput(file);
out:
return error;
}
asmlinkage long sys_fchmod(unsigned int fd, mode_t mode)
{
struct inode * inode;
struct dentry * dentry;
struct file * file;
int err = -EBADF;
struct iattr newattrs;
file = fget(fd);
if (!file)
goto out;
dentry = file->f_path.dentry;
inode = dentry->d_inode;
audit_inode(NULL, dentry);
err = mnt_want_write(file->f_path.mnt);
if (err)
goto out_putf;
err = -EPERM;
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
goto out_drop_write;
mutex_lock(&inode->i_mutex);
if (mode == (mode_t) -1)
mode = inode->i_mode;
newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
err = notify_change(dentry, &newattrs);
mutex_unlock(&inode->i_mutex);
out_drop_write:
mnt_drop_write(file->f_path.mnt);
out_putf:
fput(file);
out:
return err;
}
/* To read a file:
* o fget(fd)
* o call its virtual read fs_op
* o update f_pos
* o fput() it
* o return the number of bytes read, or an error
*
* Error cases you must handle for this function at the VFS level:
* o EBADF
* fd is not a valid file descriptor or is not open for reading.
* o EISDIR
* fd refers to a directory.
*
* In all cases, be sure you do not leak file refcounts by returning before
* you fput() a file that you fget()'ed.
*/
int
do_read(int fd, void *buf, size_t nbytes)
{
int bytes_read =0;
file_t *f;
if((f=fget(fd)) == NULL || curproc->p_files[fd] == NULL)
{
dbg(DBG_PRINT,"(GRADING2B) given file descriptor is not valid\n");
dbg(DBG_ERROR,"do_read(): the given %d fd is not a valid file descriptor\n",fd);
return -EBADF;
}
if((f->f_mode & FMODE_READ) != FMODE_READ)
{
fput(f);
dbg(DBG_PRINT,"(GRADING2B) the given file is not open for reading\n");
dbg(DBG_ERROR,"do_read(): FILE obtained is not open for reading\n");
return -EBADF;
}
if(S_ISDIR(f->f_vnode->vn_mode))
{
dbg(DBG_PRINT,"(GRADING2B) The given file is actually a directory\n");
dbg(DBG_ERROR, "do_read(): obtained file is a directory\n");
fput(f);
return -EISDIR;
}
bytes_read = f->f_vnode->vn_ops->read(f->f_vnode,f->f_pos,buf,nbytes);
f->f_pos = bytes_read + f->f_pos;
fput(f);
return bytes_read;
/*NOT_YET_IMPLEMENTED("VFS: do_read");*/
}
SYSCALL_DEFINE3(getdents64, unsigned int, fd,
struct linux_dirent64 __user *, dirent, unsigned int, count)
{
struct file * file;
struct linux_dirent64 __user * lastdirent;
struct getdents_callback64 buf;
int error;
error = -EFAULT;
if (!access_ok(VERIFY_WRITE, dirent, count))
goto out;
error = -EBADF;
file = fget(fd);
if (!file)
goto out;
buf.current_dir = dirent;
buf.previous = NULL;
buf.file = file;
buf.count = count;
buf.error = 0;
error = vfs_readdir(file, filldir64, &buf);
if (error >= 0)
error = buf.error;
lastdirent = buf.previous;
if (lastdirent) {
typeof(lastdirent->d_off) d_off = file->f_pos;
if (__put_user(d_off, &lastdirent->d_off))
error = -EFAULT;
else
error = count - buf.count;
}
fput(file);
out:
return error;
}
asmlinkage long sys_getdents(unsigned int fd, struct linux_dirent __user * dirent, unsigned int count)
{
struct file * file;
struct linux_dirent __user * lastdirent;
struct getdents_callback buf;
int error;
error = -EFAULT;
if (!access_ok(VERIFY_WRITE, dirent, count))
goto out;
error = -EBADF;
file = fget(fd);
if (!file)
goto out;
buf.current_dir = dirent;
buf.previous = NULL;
buf.count = count;
buf.error = 0;
error = vfs_readdir(file, filldir, &buf);
if (error < 0)
goto out_putf;
error = buf.error;
lastdirent = buf.previous;
if (lastdirent) {
if (put_user(file->f_pos, &lastdirent->d_off))
error = -EFAULT;
else
error = count - buf.count;
}
out_putf:
fput(file);
out:
return error;
}
int efab_linux_trampoline_close32(int fd)
{
/* Firstly, is this one our sockets? If not, do the usual thing */
struct file *f;
int rc;
TRAMP_DEBUG("close32: %d\n", fd);
efab_syscall_enter();
f = fget (fd);
if (f) {
if (FILE_IS_ENDPOINT(f)) {
/* Yep -- it's one of ours. This means current process must be using the
* module (otherwise how did one of our sockets get in this proc's fd
* table?). It seems it didn't get intercepted -- trampoline back up.
* However, only set up trampoline if this has been called via the
* correct sys-call entry point
*/
if (setup_trampoline (PT_REGS_FROM_SYSCALL(),
CI_TRAMP_OPCODE_CLOSE, fd, TRAMPOLINE_BITS_32) == 0)
{
/* The trampoline will get run. Let it handle the rest. */
fput(f);
efab_syscall_exit();
return 0;
}
}
/* Undo the fget above */
fput(f);
}
/* Not one of our FDs -- usual close */
rc = ((int (*)(int))THUNKPTR(state.replace_close->original_entry32))(fd);
TRAMP_DEBUG("Close32: Chain returns %d \n", rc);
efab_syscall_exit();
return rc;
}
/*
* Nfs server psuedo system call for the nfsd's
* Based on the flag value it either:
* - adds a socket to the selection list
* - remains in the kernel as an nfsd
* - remains in the kernel as an nfsiod
* For INET6 we suppose that nfsd provides only IN6P_IPV6_V6ONLY sockets
* and that mountd provides
* - sockaddr with no IPv4-mapped addresses
* - mask for both INET and INET6 families if there is IPv4-mapped overlap
*/
int
nfssvc_nfsserver(struct thread *td, struct nfssvc_args *uap)
{
struct file *fp;
struct nfsd_addsock_args addsockarg;
struct nfsd_nfsd_args nfsdarg;
cap_rights_t rights;
int error;
if (uap->flag & NFSSVC_ADDSOCK) {
error = copyin(uap->argp, (caddr_t)&addsockarg,
sizeof(addsockarg));
if (error)
return (error);
error = fget(td, addsockarg.sock,
cap_rights_init(&rights, CAP_SOCK_SERVER), &fp);
if (error)
return (error);
if (fp->f_type != DTYPE_SOCKET) {
fdrop(fp, td);
return (error); /* XXXRW: Should be EINVAL? */
}
error = nfssvc_addsock(fp, td);
fdrop(fp, td);
} else if (uap->flag & NFSSVC_OLDNFSD)
error = nfssvc_nfsd(td, NULL);
else if (uap->flag & NFSSVC_NFSD) {
if (!uap->argp)
return (EINVAL);
error = copyin(uap->argp, (caddr_t)&nfsdarg,
sizeof(nfsdarg));
if (error)
return (error);
error = nfssvc_nfsd(td, &nfsdarg);
} else
error = ENXIO;
return (error);
}
/*
****************************************************************
* Função "t_snd" *
****************************************************************
*/
int
itnetsnd (int fd, const void *area, int count, int flags)
{
KFILE *fp;
IOREQ io;
/*
* Prólogo
*/
if ((fp = fget (fd)) == NOKFILE)
return (-1);
u.u_oflag = fp->f_flags;
if (MINOR (fp->f_inode->i_rdev) != TCP)
{ u.u_error = EINVAL; return (-1); }
/*
* Prepara o bloco de E/S
*/
/*** io.io_fd = ...; ***/
io.io_fp = fp;
/*** io.io_ip = ...; ***/
/*** io.io_dev = ...; ***/
io.io_area = (void *)area;
io.io_count = count;
/*** io.io_offset_low = ...; ***/
/*** io.io_cpflag = ...; ***/
/*** io.io_rablock = ...; ***/
/*
* Executa o "t_snd"
*/
k_snd (&io, flags);
return (count - io.io_count);
} /* end itnetsnd */
static mali_sync_pt *mali_stream_create_point_internal(int tl_fd, mali_bool timed)
{
struct sync_timeline *tl;
struct sync_pt * pt;
struct file *tl_file;
tl_file = fget(tl_fd);
if (tl_file == NULL)
return NULL;
if (tl_file->f_op != &stream_fops)
{
pt = NULL;
goto out;
}
tl = tl_file->private_data;
if (unlikely(timed))
{
pt = mali_sync_timed_pt_alloc(tl);
}
else
{
pt = mali_sync_pt_alloc(tl);
}
if (!pt)
{
pt = NULL;
goto out;
}
out:
fput(tl_file);
return pt;
}
SYSCALL_DEFINE3(samba_reserve, int, fd, loff_t __user*, start, loff_t __user*, length)
{
struct file *file;
long ret = -EBADF;
loff_t st = 0, len = 0;
file = fget(fd);
if (!file)
goto no_file_out;
if (!start) {
ret = -EINVAL;
goto out;
}
if (!length) {
ret = -EINVAL;
goto out;
}
if (unlikely(copy_from_user(&st, start, sizeof(loff_t)))) {
ret = -EFAULT;
goto out;
}
if (unlikely(copy_from_user(&len, length, sizeof(loff_t)))) {
ret = -EFAULT;
goto out;
}
//printk("samba_reserve() %p, %lld, %lld\n", file, st, len);
ret = do_preallocate(file, st, len);
out:
fput(file);
no_file_out:
return ret;
}
long do_signalfd(int ufd, sigset_t *sigmask, int flags)
{
struct signalfd_ctx *ctx;
if (ufd == -1) {
ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->sigmask = *sigmask;
/*
* When we call this, the initialization must be complete, since
* anon_inode_getfd() will install the fd.
*/
ufd = anon_inode_getfd("[signalfd]", &signalfd_fops, ctx,
flags & (O_CLOEXEC | O_NONBLOCK));
if (ufd < 0)
kfree(ctx);
} else {
struct file *file = fget(ufd);
if (!file)
return -EBADF;
ctx = file->private_data;
if (file->f_op != &signalfd_fops) {
fput(file);
return -EINVAL;
}
spin_lock_irq(¤t->sighand->siglock);
ctx->sigmask = *sigmask;
spin_unlock_irq(¤t->sighand->siglock);
wake_up(¤t->sighand->signalfd_wqh);
fput(file);
}
return ufd;
}
SYSCALL_DEFINE3(old_readdir, unsigned int, fd,
struct old_linux_dirent __user *, dirent, unsigned int, count)
{
int error;
struct file * file;
struct readdir_callback buf;
error = -EBADF;
file = fget(fd);
if (!file)
goto out;
buf.result = 0;
buf.dirent = dirent;
error = vfs_readdir(file, fillonedir, &buf);
if (buf.result)
error = buf.result;
fput(file);
out:
return error;
}
asmlinkage int old_mmap(struct mmap_arg_struct *arg)
{
int error = -EFAULT;
struct file * file = NULL;
struct mmap_arg_struct a;
lock_kernel();
if (copy_from_user(&a, arg, sizeof(a)))
goto out;
if (!(a.flags & MAP_ANONYMOUS)) {
error = -EBADF;
file = fget(a.fd);
if (!file)
goto out;
}
a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
error = do_mmap(file, a.addr, a.len, a.prot, a.flags, a.offset);
if (file)
fput(file);
out:
unlock_kernel();
return error;
}
asmlinkage int old32_readdir(unsigned int fd, struct old_linux_dirent32 __user *dirent, unsigned int count)
{
int error = -EBADF;
struct file * file;
struct readdir_callback32 buf;
file = fget(fd);
if (!file)
goto out;
buf.count = 0;
buf.dirent = dirent;
error = vfs_readdir(file, (filldir_t)fillonedir, &buf);
if (error < 0)
goto out_putf;
error = buf.count;
out_putf:
fput(file);
out:
return error;
}
/* common code for old and new mmaps */
static inline long
do_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
unsigned long flags, unsigned long fd, unsigned long pgoff)
{
int error = -EBADF;
struct file * file = NULL;
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
if (!(flags & MAP_ANONYMOUS)) {
file = fget(fd);
if (!file)
goto out;
}
down_write(¤t->mm->mmap_sem);
error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
up_write(¤t->mm->mmap_sem);
if (file)
fput(file);
out:
return error;
}
struct socket *sockfd_to_socket(unsigned int sockfd)
{
struct socket *socket;
struct file *file;
struct inode *inode;
file = fget(sockfd);
if (!file) {
pr_err("invalid sockfd\n");
return NULL;
}
inode = file_inode(file);
if (!inode || !S_ISSOCK(inode->i_mode)) {
fput(file);
return NULL;
}
socket = SOCKET_I(inode);
return socket;
}
static int
ksem_get(struct thread *td, semid_t id, cap_rights_t *rightsp,
struct file **fpp)
{
struct ksem *ks;
struct file *fp;
int error;
error = fget(td, id, rightsp, &fp);
if (error)
return (EINVAL);
if (fp->f_type != DTYPE_SEM) {
fdrop(fp, td);
return (EINVAL);
}
ks = fp->f_data;
if (ks->ks_flags & KS_DEAD) {
fdrop(fp, td);
return (EINVAL);
}
*fpp = fp;
return (0);
}
SYSCALL_DEFINE2(fchmod, unsigned int, fd, mode_t, mode)
{
struct inode * inode;
struct dentry * dentry;
struct file * file;
int err = -EBADF;
struct iattr newattrs;
file = fget(fd);
if (!file)
goto out;
dentry = file->f_path.dentry;
inode = dentry->d_inode;
audit_inode(NULL, dentry);
err = mnt_want_write_file(file);
if (err)
goto out_putf;
mutex_lock(&inode->i_mutex);
err = security_path_chmod(dentry, file->f_vfsmnt, mode);
if (err)
goto out_unlock;
if (mode == (mode_t) -1)
mode = inode->i_mode;
newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
err = notify_change(dentry, &newattrs);
out_unlock:
mutex_unlock(&inode->i_mutex);
mnt_drop_write(file->f_path.mnt);
out_putf:
fput(file);
out:
return err;
}
/* Linux version of mmap */
static unsigned long do_mmap2(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags, unsigned long fd,
unsigned long pgoff)
{
struct file * file = NULL;
unsigned long retval = -EBADF;
if (!(flags & MAP_ANONYMOUS)) {
file = fget(fd);
if (!file)
goto out;
}
retval = -EINVAL;
len = PAGE_ALIGN(len);
if (ARCH_SUN4C_SUN4 &&
(len > 0x20000000 ||
((flags & MAP_FIXED) &&
addr < 0xe0000000 && addr + len > 0x20000000)))
goto out_putf;
/* See asm-sparc/uaccess.h */
if (len > TASK_SIZE - PAGE_SIZE || addr + len > TASK_SIZE - PAGE_SIZE)
goto out_putf;
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
down_write(¤t->mm->mmap_sem);
retval = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
up_write(¤t->mm->mmap_sem);
out_putf:
if (file)
fput(file);
out:
return retval;
}
/*
* Set the pipe fd for kernel communication to the daemon.
*
* Normally this is set at mount using an option but if we
* are reconnecting to a busy mount then we need to use this
* to tell the autofs mount about the new kernel pipe fd. In
* order to protect mounts against incorrectly setting the
* pipefd we also require that the autofs mount be catatonic.
*
* This also sets the process group id used to identify the
* controlling process (eg. the owning automount(8) daemon).
*/
static int autofs_dev_ioctl_setpipefd(struct file *fp,
struct autofs_sb_info *sbi,
struct autofs_dev_ioctl *param)
{
int pipefd;
int err = 0;
if (param->setpipefd.pipefd == -1)
return -EINVAL;
pipefd = param->setpipefd.pipefd;
mutex_lock(&sbi->wq_mutex);
if (!sbi->catatonic) {
mutex_unlock(&sbi->wq_mutex);
return -EBUSY;
} else {
struct file *pipe = fget(pipefd);
if (!pipe) {
err = -EBADF;
goto out;
}
if (!pipe->f_op || !pipe->f_op->write) {
err = -EPIPE;
fput(pipe);
goto out;
}
sbi->oz_pgrp = task_pgrp_nr(current);
sbi->pipefd = pipefd;
sbi->pipe = pipe;
sbi->catatonic = 0;
sbi->compat_daemon = is_compat_task();
}
out:
mutex_unlock(&sbi->wq_mutex);
return err;
}
/* Same as do_dup, but insted of using get_empty_fd() to get the new fd,
* they give it to us in 'nfd'. If nfd is in use (and not the same as ofd)
* do_close() it first. Then return the new file descriptor.
*
* Error cases you must handle for this function at the VFS level:
* o EBADF
* ofd isn't an open file descriptor, or nfd is out of the allowed
* range for file descriptors.
*/
int
do_dup2(int ofd, int nfd)
{
/*dbg(DBG_PRINT," Entering do_dup2 ****************************************\n");
*/
if (nfd < 0 || nfd >= NFILES || ofd == -1)
{
/*dbg(DBG_PRINT,"ofd %d nfd %d EBADF Leaving do_dup2 ****************************************\n",ofd,nfd);*/
dbg(DBG_PRINT,"(GRADING2C)\n");
return -EBADF;
}
file_t *f = fget(ofd);
dbg(DBG_PRINT,"(GRADING2C)\n");
if (NULL == f){
dbg(DBG_PRINT,"(GRADING2C)\n");
/*dbg(DBG_PRINT,"ofd %d nfd %d EBADF Leaving do_dup2 ****************************************\n",ofd,nfd);
*/
return -EBADF;
}
if(nfd == ofd)
{
dbg(DBG_PRINT,"(GRADING2C)\n");
fput(f);
return nfd;
}
if (curproc->p_files[nfd] != NULL && nfd != ofd)
{
dbg(DBG_PRINT,"(GRADING2C)\n");
do_close(nfd);
}
curproc->p_files[nfd] = f;
/*dbg(DBG_PRINT," Leaving do_dup2 ****************************************\n");*/
return nfd;
}
/* To dup a file:
* o fget(fd) to up fd's refcount
* o get_empty_fd()
* o point the new fd to the same file_t* as the given fd
* o return the new file descriptor
*
* Don't fput() the fd unless something goes wrong. Since we are creating
* another reference to the file_t*, we want to up the refcount.
*
* Error cases you must handle for this function at the VFS level:
* o EBADF
* fd isn't an open file descriptor.
* o EMFILE
* The process already has the maximum number of file descriptors open
* and tried to open a new one.
*/
int
do_dup(int fd)
{
dbg(DBG_PRINT,"do_dup called for fd = %d\n", fd);
/* NOT_YET_IMPLEMENTED("VFS: do_dup"); */
/*ERROR!!! fd is outside of allowed range of file descriptors*/
if ((fd >= NFILES) || ( fd < 0)) {
dbg(DBG_PRINT,"ERROR!!! fd = %d is out of range\n", fd);
return -EBADF;
}
/* o fget(fd) to up fd's refcount*/
file_t *cur_file_t = fget(fd);
/* fd is not a valid file descriptor*/
if (cur_file_t == NULL) {
dbg(DBG_PRINT,"ERROR!!! No file descriptor entry for correspoding fd = %d\n", fd);
/* fput(cur_file_t); */
return -EBADF;
}
/* o get_empty_fd()*/
int new_fd = get_empty_fd(curproc);
/* ERROR!!! The process already has the maximum number of files open.*/
if (new_fd == -EMFILE){
dbg(DBG_PRINT,"ERROR!!! Max limit of file descriptors reached fd\n");
fput(cur_file_t);
return -EMFILE;
}
/* o point the new fd to the same file_t* as the given fd*/
curproc->p_files[new_fd] = cur_file_t;
/* o return the new file descriptor*/
dbg(DBG_PRINT,"Returning fd = %d\n", new_fd);
return new_fd;
}
int options()
{
char answer[5];
system("clear");
printf("Copy Decrypt0r in the path ?\n");
printf("1) YES\n");
printf("2) NON\n");
fget(answer, 5);
if (strcasecmp(answer, "yes")==0 || strcasecmp(answer, "1")==0)
{
printf("It will also copy dmg et xpwn\n");
system("chmod +x xpwn dmg");
system("sudo cp decrypt0r xpwn dmg /usr/local/bin");
printf("Done\n");
}
else
{
return EXIT_SUCCESS;
}
}
static struct vperfctr *fd_get_vperfctr(int fd)
{
struct vperfctr *perfctr;
struct file *filp;
int err;
err = -EBADF;
filp = fget(fd);
if (!filp)
goto out;
err = -EINVAL;
if (filp->f_op != &vperfctr_file_ops)
goto out_filp;
perfctr = filp->private_data;
if (!perfctr)
goto out_filp;
atomic_inc(&perfctr->count);
fput(filp);
return perfctr;
out_filp:
fput(filp);
out:
return ERR_PTR(err);
}
static int
mfi_linux_ioctl(struct thread *p, struct linux_ioctl_args *args)
{
cap_rights_t rights;
struct file *fp;
int error;
u_long cmd = args->cmd;
switch (cmd) {
case MFI_LINUX_CMD:
cmd = MFI_LINUX_CMD_2;
break;
case MFI_LINUX_SET_AEN:
cmd = MFI_LINUX_SET_AEN_2;
break;
}
error = fget(p, args->fd, cap_rights_init(&rights, CAP_IOCTL), &fp);
if (error != 0)
return (error);
error = fo_ioctl(fp, cmd, (caddr_t)args->arg, p->td_ucred, p);
fdrop(fp, p);
return (error);
}
asmlinkage long sys_fchmod(unsigned int fd, mode_t mode)
{
struct _inode * inode;
struct _dentry * dentry;
struct file * file;
int err = -EBADF;
struct iattr newattrs;
file = fget(fd);
if (!file)
goto out;
dentry = file_get_dentry(file);
inode = d_get_inode(dentry);
audit_inode(NULL, inode);
err = -EROFS;
if (IS_RDONLY(inode))
goto out_putf;
err = -EPERM;
if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
goto out_putf;
imutex_lock(parent(inode));
if (mode == (mode_t) -1)
mode = inode->i_mode;
newattrs.ia_mode = (mode & S_IALLUGO) | (inode->i_mode & ~S_IALLUGO);
newattrs.ia_valid = ATTR_MODE | ATTR_CTIME;
err = notify_change(dentry, &newattrs);
imutex_unlock(parent(inode));
out_putf:
fput(file);
out:
return err;
}
static struct socket *sockfd_lookup(int fd, int *err)
{
struct file *file;
struct inode *inode;
struct socket *sock;
if (!(file = fget(fd))) {
*err = -EBADF;
return NULL;
}
inode = file->f_dentry->d_inode;
if (!inode->i_sock || !(sock = socki_lookup(inode))) {
*err = -ENOTSOCK;
fput(file);
return NULL;
}
if (sock->file != file) {
printk(KERN_ERR "socki_lookup: socket file changed!\n");
sock->file = file;
}
return sock;
}
/*
* Zero curproc->p_files[fd], and fput() the file. Return 0 on success
*
* Error cases you must handle for this function at the VFS level:
* o EBADF
* fd isn't a valid open file descriptor.
*/
int
do_close(int fd)
{
file_t *file;
if (fd < 0) {
dbg(DBG_PRINT,"(GRADING2B)\n");
return -EBADF;
}
file = fget(fd);
dbg(DBG_PRINT,"(GRADING2B)\n");
if (file == NULL) {
dbg(DBG_PRINT,"(GRADING2B)\n");
return -EBADF;
}
fput(file);
curproc->p_files[fd] = NULL;
fput(file);
/*NOT_YET_IMPLEMENTED("VFS: do_close");*/
return 0;
}
asmlinkage int solaris_ioctl(unsigned int fd, unsigned int cmd, u32 arg)
{
struct file *filp;
int error = -EBADF;
filp = fget(fd);
if (!filp)
goto out;
lock_kernel();
error = -EFAULT;
switch ((cmd >> 8) & 0xff) {
case 'S': error = solaris_S(filp, fd, cmd, arg); break;
case 'T': error = solaris_T(fd, cmd, arg); break;
case 'i': error = solaris_i(fd, cmd, arg); break;
case 'r': error = solaris_r(fd, cmd, arg); break;
case 's': error = solaris_s(fd, cmd, arg); break;
case 't': error = solaris_t(fd, cmd, arg); break;
case 'f': error = sys_ioctl(fd, cmd, arg); break;
case 'm': error = solaris_m(fd, cmd, arg); break;
case 'O': error = solaris_O(fd, cmd, arg); break;
default:
error = -ENOSYS;
break;
}
unlock_kernel();
fput(filp);
out:
if (error == -ENOSYS) {
unsigned char c = cmd>>8;
if (c < ' ' || c > 126) c = '.';
printk("solaris_ioctl: Unknown cmd fd(%d) cmd(%08x '%c') arg(%08x)\n",
(int)fd, (unsigned int)cmd, c, (unsigned int)arg);
error = -EINVAL;
}