diff options
Diffstat (limited to 'winsup/cygwin/fhandler_dev.cc')
| -rw-r--r-- | winsup/cygwin/fhandler_dev.cc | 230 |
1 files changed, 0 insertions, 230 deletions
diff --git a/winsup/cygwin/fhandler_dev.cc b/winsup/cygwin/fhandler_dev.cc deleted file mode 100644 index 9d8750436..000000000 --- a/winsup/cygwin/fhandler_dev.cc +++ /dev/null @@ -1,230 +0,0 @@ -/* fhandler_dev.cc, Implement /dev. - - Copyright 2012 Red Hat, Inc. - -This file is part of Cygwin. - -This software is a copyrighted work licensed under the terms of the -Cygwin license. Please consult the file "CYGWIN_LICENSE" for -details. */ - -#include "winsup.h" -#include <stdlib.h> -#include <sys/statvfs.h> -#include "path.h" -#include "fhandler.h" -#include "dtable.h" -#include "cygheap.h" -#include "devices.h" - -#define _COMPILING_NEWLIB -#include <dirent.h> - -#define dev_prefix_len (sizeof ("/dev")) -#define dev_storage_scan_start (dev_storage + 1) -#define dev_storage_size (dev_storage_end - dev_storage_scan_start) - -static int -device_cmp (const void *a, const void *b) -{ - return strcmp (((const device *) a)->name, - ((const device *) b)->name + dev_prefix_len); -} - -fhandler_dev::fhandler_dev () : - fhandler_disk_file (), devidx (NULL), dir_exists (true) -{ -} - -int -fhandler_dev::open (int flags, mode_t mode) -{ - if ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL)) - { - set_errno (EEXIST); - return 0; - } - if (flags & O_WRONLY) - { - set_errno (EISDIR); - return 0; - } - int ret = fhandler_disk_file::open (flags, mode); - if (!ret) - { - flags |= O_DIROPEN; - set_flags (flags); - nohandle (true); - } - return 1; -} - -int -fhandler_dev::close () -{ - if (nohandle ()) - return 0; - return fhandler_disk_file::close (); -} - -int -fhandler_dev::fstat (struct __stat64 *st) -{ - /* If /dev really exists on disk, return correct disk information. */ - if (pc.fs_got_fs ()) - return fhandler_disk_file::fstat (st); - /* Otherwise fake virtual filesystem. */ - fhandler_base::fstat (st); - st->st_ino = 2; - st->st_mode = S_IFDIR | STD_RBITS | STD_XBITS; - st->st_nlink = 1; - return 0; -} - -int __stdcall -fhandler_dev::fstatvfs (struct statvfs *sfs) -{ - int ret = -1, opened = 0; - HANDLE fh = get_handle (); - - if (!fh && !nohandle ()) - { - if (!open (O_RDONLY, 0)) - return -1; - opened = 1; - } - if (!nohandle ()) - { - ret = fhandler_disk_file::fstatvfs (sfs); - goto out; - } - /* Virtual file system. Just return an empty buffer with a few values - set to something useful. Just as on Linux. */ - memset (sfs, 0, sizeof (*sfs)); - sfs->f_bsize = sfs->f_frsize = 4096; - sfs->f_namemax = NAME_MAX; - ret = 0; - -out: - if (opened) - close (); - return ret; -} - -DIR * -fhandler_dev::opendir (int fd) -{ - DIR *dir; - DIR *res = NULL; - - dir = fhandler_disk_file::opendir (fd); - if (dir) - return dir; - if ((dir = (DIR *) malloc (sizeof (DIR))) == NULL) - set_errno (ENOMEM); - else if ((dir->__d_dirent = - (struct dirent *) malloc (sizeof (struct dirent))) == NULL) - { - set_errno (ENOMEM); - goto free_dir; - } - else - { - cygheap_fdnew cfd; - if (cfd < 0 && fd < 0) - goto free_dirent; - - dir->__d_dirname = NULL; - dir->__d_dirent->__d_version = __DIRENT_VERSION; - dir->__d_cookie = __DIRENT_COOKIE; - dir->__handle = INVALID_HANDLE_VALUE; - dir->__d_position = 0; - dir->__flags = 0; - dir->__d_internal = 0; - - if (fd >= 0) - dir->__d_fd = fd; - else - { - cfd = this; - dir->__d_fd = cfd; - cfd->nohandle (true); - } - set_close_on_exec (true); - dir->__fh = this; - devidx = dev_storage_scan_start; - res = dir; - } - - syscall_printf ("%p = opendir (%s)", res, get_name ()); - return res; - -free_dirent: - free (dir->__d_dirent); -free_dir: - free (dir); - return res; -} - -int -fhandler_dev::readdir (DIR *dir, dirent *de) -{ - int ret; - const device *curdev; - device dev; - - if (!devidx) - { - while ((ret = fhandler_disk_file::readdir (dir, de)) == 0) - { - /* Avoid to print devices for which users have created files under - /dev already, for instance by using the old script from Igor - Peshansky. */ - dev.name = de->d_name; - if (!bsearch (&dev, dev_storage_scan_start, dev_storage_size, - sizeof dev, device_cmp)) - break; - } - if (ret != ENMFILE) - goto out; - devidx = dev_storage_scan_start; - } - - /* Now start processing our internal dev table. */ - ret = ENMFILE; - while ((curdev = devidx++) < dev_storage_end) - { - /* If exists returns < 0 it means that the device can be used by a - program but its use is deprecated and, so, it is not returned - by readdir((). */ - if (curdev->exists () <= 0) - continue; - ++dir->__d_position; - strcpy (de->d_name, curdev->name + dev_prefix_len); - if (curdev->get_major () == DEV_TTY_MAJOR - && (curdev->is_device (FH_CONIN) - || curdev->is_device (FH_CONOUT) - || curdev->is_device (FH_CONSOLE))) - { - /* Make sure conin, conout, and console have the same inode number - as the current consX. */ - de->d_ino = myself->ctty; - } - else - de->d_ino = curdev->get_device (); - de->d_type = curdev->type (); - ret = 0; - break; - } - -out: - debug_printf ("returning %d", ret); - return ret; -} - -void -fhandler_dev::rewinddir (DIR *dir) -{ - devidx = dir_exists ? NULL : dev_storage_scan_start; - fhandler_disk_file::rewinddir (dir); -} |