diff options
Diffstat (limited to 'sysdeps/mach/hurd/fcntl.c')
| -rw-r--r-- | sysdeps/mach/hurd/fcntl.c | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/sysdeps/mach/hurd/fcntl.c b/sysdeps/mach/hurd/fcntl.c deleted file mode 100644 index 174e408edc..0000000000 --- a/sysdeps/mach/hurd/fcntl.c +++ /dev/null @@ -1,212 +0,0 @@ -/* Copyright (C) 1992-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <fcntl.h> -#include <hurd.h> -#include <hurd/fd.h> -#include <stdarg.h> -#include <sys/file.h> /* XXX for LOCK_* */ - -/* Perform file control operations on FD. */ -int -__libc_fcntl (int fd, int cmd, ...) -{ - va_list ap; - struct hurd_fd *d; - int result; - - d = _hurd_fd_get (fd); - - if (d == NULL) - return __hurd_fail (EBADF); - - va_start (ap, cmd); - - switch (cmd) - { - error_t err; - - default: /* Bad command. */ - errno = EINVAL; - result = -1; - break; - - /* First the descriptor-based commands, which do no RPCs. */ - - case F_DUPFD: /* Duplicate the file descriptor. */ - case F_DUPFD_CLOEXEC: - { - struct hurd_fd *new; - io_t port, ctty; - struct hurd_userlink ulink, ctty_ulink; - int flags; - - HURD_CRITICAL_BEGIN; - - /* Extract the ports and flags from the file descriptor. */ - __spin_lock (&d->port.lock); - flags = d->flags; - ctty = _hurd_port_get (&d->ctty, &ctty_ulink); - port = _hurd_port_locked_get (&d->port, &ulink); /* Unlocks D. */ - - if (cmd == F_DUPFD_CLOEXEC) - flags |= FD_CLOEXEC; - else - /* Duplication clears the FD_CLOEXEC flag. */ - flags &= ~FD_CLOEXEC; - - /* Get a new file descriptor. The third argument to __fcntl is the - minimum file descriptor number for it. */ - new = _hurd_alloc_fd (&result, va_arg (ap, int)); - if (new == NULL) - /* _hurd_alloc_fd has set errno. */ - result = -1; - else - { - /* Give the ports each a user ref for the new descriptor. */ - __mach_port_mod_refs (__mach_task_self (), port, - MACH_PORT_RIGHT_SEND, 1); - if (ctty != MACH_PORT_NULL) - __mach_port_mod_refs (__mach_task_self (), ctty, - MACH_PORT_RIGHT_SEND, 1); - - /* Install the ports and flags in the new descriptor. */ - if (ctty != MACH_PORT_NULL) - _hurd_port_set (&new->ctty, ctty); - new->flags = flags; - _hurd_port_locked_set (&new->port, port); /* Unlocks NEW. */ - } - - HURD_CRITICAL_END; - - _hurd_port_free (&d->port, &ulink, port); - if (ctty != MACH_PORT_NULL) - _hurd_port_free (&d->ctty, &ctty_ulink, port); - - break; - } - - /* Set RESULT by evaluating EXPR with the descriptor locked. - Check for an empty descriptor and return EBADF. */ -#define LOCKED(expr) \ - HURD_CRITICAL_BEGIN; \ - __spin_lock (&d->port.lock); \ - if (d->port.port == MACH_PORT_NULL) \ - result = __hurd_fail (EBADF); \ - else \ - result = (expr); \ - __spin_unlock (&d->port.lock); \ - HURD_CRITICAL_END; - - case F_GETFD: /* Get descriptor flags. */ - LOCKED (d->flags); - break; - - case F_SETFD: /* Set descriptor flags. */ - LOCKED ((d->flags = va_arg (ap, int), 0)); - break; - - - /* Now the real io operations, done by RPCs to io servers. */ - - case F_GETLK: - case F_SETLK: - case F_SETLKW: - { - /* XXX - We need new RPCs to support POSIX.1 fcntl file locking!! - For the time being we support the whole-file case only, - with all kinds of WRONG WRONG WRONG semantics, - by using flock. This is definitely the Wrong Thing, - but it might be better than nothing (?). */ - struct flock *fl = va_arg (ap, struct flock *); - va_end (ap); - switch (cmd) - { - case F_GETLK: - errno = ENOSYS; - return -1; - case F_SETLK: - cmd = LOCK_NB; - break; - default: - cmd = 0; - break; - } - switch (fl->l_type) - { - case F_RDLCK: cmd |= LOCK_SH; break; - case F_WRLCK: cmd |= LOCK_EX; break; - case F_UNLCK: cmd |= LOCK_UN; break; - default: - errno = EINVAL; - return -1; - } - switch (fl->l_whence) - { - case SEEK_SET: - if (fl->l_start == 0 && fl->l_len == 0) /* Whole file request. */ - break; - /* It seems to be common for applications to lock the first - byte of the file when they are really doing whole-file locking. - So, since it's so wrong already, might as well do that too. */ - if (fl->l_start == 0 && fl->l_len == 1) - break; - /* FALLTHROUGH */ - case SEEK_CUR: - case SEEK_END: - errno = ENOTSUP; - return -1; - default: - errno = EINVAL; - return -1; - } - - return __flock (fd, cmd); - } - - case F_GETFL: /* Get per-open flags. */ - if (err = HURD_FD_PORT_USE (d, __io_get_openmodes (port, &result))) - result = __hurd_dfail (fd, err); - break; - - case F_SETFL: /* Set per-open flags. */ - err = HURD_FD_PORT_USE (d, __io_set_all_openmodes (port, - va_arg (ap, int))); - result = err ? __hurd_dfail (fd, err) : 0; - break; - - case F_GETOWN: /* Get owner. */ - if (err = HURD_FD_PORT_USE (d, __io_get_owner (port, &result))) - result = __hurd_dfail (fd, err); - break; - - case F_SETOWN: /* Set owner. */ - err = HURD_FD_PORT_USE (d, __io_mod_owner (port, va_arg (ap, pid_t))); - result = err ? __hurd_dfail (fd, err) : 0; - break; - } - - va_end (ap); - - return result; -} -libc_hidden_def (__libc_fcntl) -weak_alias (__libc_fcntl, __fcntl) -libc_hidden_weak (__fcntl) -weak_alias (__libc_fcntl, fcntl) |