368 lines
9.7 KiB
Plaintext
368 lines
9.7 KiB
Plaintext
%import {
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#include "winsup.h"
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#include "devices.h"
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#include "sys/cygwin.h"
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#include "tty.h"
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#include "pinfo.h"
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#include "shared_info.h"
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#include "path.h"
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#include "fhandler.h"
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#include "ntdll.h"
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typedef const _device *KR_device_t;
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}
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%type KR_device_t
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%local {
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static int
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exists_internal (const device&)
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{
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return false;
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}
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static int
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exists (const device&)
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{
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return true;
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}
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/* Check existence of POSIX devices backed by real NT devices. */
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static int
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exists_ntdev (const device& dev)
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{
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WCHAR wpath[MAX_PATH];
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UNICODE_STRING upath;
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OBJECT_ATTRIBUTES attr;
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HANDLE h;
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NTSTATUS status;
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sys_mbstowcs (wpath, MAX_PATH, dev.native ());
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RtlInitUnicodeString (&upath, wpath);
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InitializeObjectAttributes (&attr, &upath, OBJ_CASE_INSENSITIVE, NULL, NULL);
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/* Except for the serial IO devices, the native paths are
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direct device paths, not symlinks, so every status code
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except for "NOT_FOUND" means the device exists. */
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status = NtOpenSymbolicLinkObject (&h, SYMBOLIC_LINK_QUERY, &attr);
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switch (status)
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{
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case STATUS_OBJECT_NAME_NOT_FOUND:
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case STATUS_OBJECT_PATH_NOT_FOUND:
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return false;
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case STATUS_SUCCESS:
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NtClose (h);
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default:
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break;
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}
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return true;
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}
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/* Don't list via readdir but allow as a direct reference. */
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static int
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exists_ntdev_silent (const device& dev)
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{
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return exists_ntdev (dev) ? -1 : false;
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}
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static int
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exists_console (const device& dev)
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{
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fh_devices devn = *const_cast<device *> (&dev);
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switch (devn)
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{
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case FH_CONSOLE:
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case FH_CONIN:
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case FH_CONOUT:
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return fhandler_console::exists ();
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default:
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/* Only show my own console device (for now?) */
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return iscons_dev (myself->ctty) && myself->ctty == devn;
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}
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}
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static int
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exists_pty (const device& dev)
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{
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/* Only existing slave ptys. */
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return cygwin_shared->tty.connect (dev.get_minor ()) != -1;
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}
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const _device dev_cygdrive_storage =
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{"/cygdrive", {FH_CYGDRIVE}, "", exists};
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const _device dev_fs_storage =
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{"", {FH_FS}, "", exists};
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const _device dev_proc_storage =
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{"", {FH_PROC}, "", exists};
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const _device dev_procnet_storage =
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{"", {FH_PROCNET}, "", exists};
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const _device dev_procsys_storage =
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{"", {FH_PROCSYS}, "", exists};
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const _device dev_procsysvipc_storage =
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{"", {FH_PROCSYSVIPC}, "", exists};
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const _device dev_netdrive_storage =
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{"", {FH_NETDRIVE}, "", exists};
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const _device dev_registry_storage =
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{"", {FH_REGISTRY}, "", exists_internal};
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const _device dev_piper_storage =
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{"", {FH_PIPER}, "", exists_internal};
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const _device dev_pipew_storage =
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{"", {FH_PIPEW}, "", exists_internal};
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const _device dev_signalfd_storage =
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{"", {FH_SIGNALFD}, "", exists_internal};
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const _device dev_timerfd_storage =
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{"", {FH_TIMERFD}, "", exists_internal};
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const _device dev_socket_storage =
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{"", {FH_SOCKET}, "", exists_internal};
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const _device dev_af_inet_storage =
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{"", {FH_INET}, "", exists_internal};
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const _device dev_af_unix_storage =
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{"", {FH_UNIX}, "", exists_internal};
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const _device dev_af_local_storage =
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{"", {FH_LOCAL}, "", exists_internal};
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const _device dev_bad_storage =
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{"", {FH_NADA}, "", exists_internal};
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const _device dev_error_storage =
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{"", {FH_ERROR}, "", exists_internal};
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#define BRACK(x) {devn: x}
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%storage_here
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}
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/* Internal devices below are prefixed with a ":". This moves them out of
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the POSIX namespace. */
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%%
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"/dev", BRACK(FH_DEV), "", exists, S_IFDIR
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"/dev/tty", BRACK(FH_TTY), "/dev/tty", exists, S_IFCHR
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"/dev/pty%(0-127)d", BRACK(FHDEV(DEV_PTYS_MAJOR, {$1})), "/dev/pty{$1}", exists_pty, S_IFCHR, =ptys_dev
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":ptym%(0-127)d", BRACK(FHDEV(DEV_PTYM_MAJOR, {$1})), "/dev/ptym{$1}", exists_internal, S_IFCHR, =ptym_dev
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"/dev/cons%(0-127)d", BRACK(FHDEV(DEV_CONS_MAJOR, {$1})), "/dev/cons{$1}", exists_console, S_IFCHR, =cons_dev
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"/dev/console", BRACK(FH_CONSOLE), "/dev/console", exists_console, S_IFCHR, =console_dev
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"/dev/ptmx", BRACK(FH_PTMX), "/dev/ptmx", exists, S_IFCHR
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"/dev/windows", BRACK(FH_WINDOWS), "\\Device\\Null", exists_ntdev, S_IFCHR
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"/dev/dsp", BRACK(FH_OSS_DSP), "\\Device\\Null", exists_ntdev, S_IFCHR
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"/dev/conin", BRACK(FH_CONIN), "/dev/conin", exists_console, S_IFCHR
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"/dev/conout", BRACK(FH_CONOUT), "/dev/conout", exists_console, S_IFCHR
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"/dev/null", BRACK(FH_NULL), "\\Device\\Null", exists_ntdev, S_IFCHR
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"/dev/zero", BRACK(FH_ZERO), "\\Device\\Null", exists_ntdev, S_IFCHR
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"/dev/full", BRACK(FH_FULL), "\\Device\\Null", exists_ntdev, S_IFCHR
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"/dev/random", BRACK(FH_RANDOM), "\\Device\\Null", exists_ntdev, S_IFCHR
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"/dev/urandom", BRACK(FH_URANDOM), "\\Device\\Null", exists_ntdev, S_IFCHR, =urandom_dev
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"/dev/clipboard", BRACK(FH_CLIPBOARD), "\\Device\\Null", exists_ntdev, S_IFCHR
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"/dev/com%(1-16)d", BRACK(FHDEV(DEV_SERIAL_MAJOR, {$1 - 1})), "\\??\\COM{$1}", exists_ntdev_silent, S_IFCHR
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"/dev/ttyS%(0-127)d", BRACK(FHDEV(DEV_SERIAL_MAJOR, {$1})), "\\??\\COM{$1 + 1}", exists_ntdev, S_IFCHR
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":pipe", BRACK(FH_PIPE), "/dev/pipe", exists_internal, S_IFCHR
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":fifo", BRACK(FH_FIFO), "/dev/fifo", exists_internal, S_IFCHR
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"/dev/st%(0-127)d", BRACK(FHDEV(DEV_TAPE_MAJOR, {$1})), "\\Device\\Tape{$1}", exists_ntdev, S_IFBLK
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"/dev/nst%(0-127)d", BRACK(FHDEV(DEV_TAPE_MAJOR, {$1 + 128})), "\\Device\\Tape{$1}", exists_ntdev, S_IFBLK
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"/dev/fd%(0-15)d", BRACK(FHDEV(DEV_FLOPPY_MAJOR, {$1})), "\\Device\\Floppy{$1}", exists_ntdev, S_IFBLK
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"/dev/scd%(0-15)d", BRACK(FHDEV(DEV_CDROM_MAJOR, {$1})), "\\Device\\CdRom{$1}", exists_ntdev, S_IFBLK
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"/dev/sr%(0-15)d", BRACK(FHDEV(DEV_CDROM_MAJOR, {$1})), "\\Device\\CdRom{$1}", exists_ntdev, S_IFBLK
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%other {return NULL;}
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%%
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#undef BRACK
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const _device *dev_storage_end = dev_storage
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+ (sizeof dev_storage / sizeof dev_storage[0]);
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/* Convert disk/partition to major/minor */
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static void
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conv_dp_to_mm (int drive, int part, _major_t &major, _minor_t &minor)
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{
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if (part >= 16)
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{
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major = DEV_SD_HIGHPART_START + drive / 5;
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drive %= 5;
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minor = (part - 16) + 48 * drive;
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return;
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}
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if (drive < ('q' - 'a')) /* /dev/sda -to- /dev/sdp */
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major = DEV_SD_MAJOR;
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else if (drive < 32) /* /dev/sdq -to- /dev/sdaf */
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{
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major = DEV_SD1_MAJOR;
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drive -= 'q' - 'a';
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}
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else if (drive < 48) /* /dev/sdag -to- /dev/sdav */
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{
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major = DEV_SD2_MAJOR;
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drive -= 32;
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}
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else if (drive < 64) /* /dev/sdaw -to- /dev/sdbl */
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{
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major = DEV_SD3_MAJOR;
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drive -= 48;
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}
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else if (drive < 80) /* /dev/sdbm -to- /dev/sdcb */
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{
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major = DEV_SD4_MAJOR;
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drive -= 64;
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}
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else if (drive < 96) /* /dev/sdcc -to- /dev/sdcr */
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{
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major = DEV_SD5_MAJOR;
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drive -= 80;
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}
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else if (drive < 112) /* /dev/sdcs -to- /dev/sddh */
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{
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major = DEV_SD6_MAJOR;
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drive -= 96;
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}
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/* NOTE: This will cause multiple /dev/sddx entries in
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/proc/partitions if there are more than 128 devices */
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else /* /dev/sddi -to- /dev/sddx */
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{
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major = DEV_SD7_MAJOR;
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drive -= 112;
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}
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minor = part + (drive * 16);
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}
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#define DISK_PREFIX "/dev/sd"
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#define DP_LEN (sizeof (DISK_PREFIX) - 1)
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static const char *hd_pattern = "\\Device\\Harddisk%u\\Partition%u";
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void
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device::parse (const char *s)
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{
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size_t len = strlen (s);
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const _device *dev = KR_find_keyword (s, len);
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if (!dev)
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{
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/* /dev/sd* devices have 8192 entries, given that we support 128 disks
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with up to 64 partitions. Handling them with shilka raises the size
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of devices.o from ~250K to ~2 Megs. So we handle them here manually
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to save this space. */
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int drive = 0, part = 0;
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const char *pos = s + DP_LEN;
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/* Generic check for /dev/sd[a-z] prefix */
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if (len <= DP_LEN || strncmp (s, DISK_PREFIX, DP_LEN)
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|| pos[0] < 'a' || pos[0] > 'z')
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goto no_disk;
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/* /dev/sdd[a-x]? */
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if (pos[0] == 'd' && pos[1] >= 'a' && pos[1] <= 'x')
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{
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drive = 104 + (pos[1] - 'a');
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++pos;
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}
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/* /dev/sd[a-c][a-z]? */
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else if (pos[0] <= 'c' && pos[1] >= 'a' && pos[1] <= 'z')
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{
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drive = 26 + (pos[0] - 'a') * 26 + (pos[1] - 'a');
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++pos;
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}
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else
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drive = (pos[0] - 'a');
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/* Check next position in string for partition number. */
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++pos;
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/* No partition number, equivalent to Windows partition 0. */
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if (!pos[0])
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;
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/* First digit must not be 0. */
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else if (pos[0] < '1' || pos[0] > '9')
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goto no_disk;
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else if (!pos[1])
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part = (pos[0] - '0');
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else if (pos[1] < '0' || pos[1] > '9' || pos[2] != '\0')
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goto no_disk;
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else
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{
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part = (pos[0] - '0') * 10 + (pos[1] - '0');
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if (part > 63)
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goto no_disk;
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}
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char buf[sizeof *hd_pattern + 32];
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__small_sprintf (buf, hd_pattern, drive, part);
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native (buf, false);
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if (exists_ntdev (*this))
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{
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name (s, true);
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conv_dp_to_mm (drive, part, d.major, d.minor);
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native (buf, true);
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exists_func = exists_ntdev;
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_mode = S_IFBLK;
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lives_in_dev = dev_on_fs = false;
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return;
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}
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no_disk:
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*this = *fs_dev;
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}
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else
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*this = *dev;
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}
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void
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device::init ()
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{
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/* nothing to do... yet */
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}
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void
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device::parse (_major_t major, _minor_t minor)
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{
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dev_t devn = FHDEV (major, minor);
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d.devn = 0;
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for (const _device *devidx = dev_storage; devidx < dev_storage_end; devidx++)
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if (devidx->d.devn == devn)
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{
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*this = *devidx;
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break;
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}
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if (!*this)
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d.devn = FHDEV (major, minor);
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}
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void
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device::parse (dev_t dev)
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{
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parse (_major (dev), _minor (dev));
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}
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void
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device::parsedisk (int drive, int part)
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{
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char buf[sizeof ("/dev/sddx63")], *bp;
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conv_dp_to_mm (drive, part, d.major, d.minor);
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bp = stpcpy (buf, "/dev/sd");
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if (drive >= 26)
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{
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drive -= 26;
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*bp++ = drive / 26 + 'a';
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drive %= 26;
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}
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*bp++ = drive + 'a';
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if (part)
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{
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if (part >= 10)
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{
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*bp++ = part / 10 + '0';
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part %= 10;
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}
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*bp++ = part + '0';
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}
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*bp = '\0';
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name (buf, true);
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}
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