mirror of
git://sourceware.org/git/newlib-cygwin.git
synced 2025-01-23 23:47:22 +08:00
4fc922b2c8
So far, the mqd_t type returned a pointer to an allocated area under the hood. The mutex and event objects attached to the message queue were implemented as inheritable types. As unfortunate side effect the HANDLEs to these objects were inherited by exec'd child processes, even though all other message queue properties are not inherted, per POSIX. Fix this by converting an mqd_t to a descriptor, and create a matching fhandler_mqueue object to handle various aspects of the message queues inside the fhandler. Especially, create the IPC objects as non-inheritable and duplicate the HANDLEs as part of the fixup_after_fork mechanism. Drop using mmap and create the memory map with NT functions. This allows to control duplication of handle and mapping in the forked child process, without the requirement to regenerate the map in the same spot. It also allows to dup() the descriptor, as on Linux, albeit this isn't implemented yet. This patch is the first cut. There's a bit more to do, like moving more functionality from the POSIX functions into the fhandler and making sure the mqd_t type can't be used in other descriptor-related functions willy-nilly. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
448 lines
15 KiB
C++
448 lines
15 KiB
C++
/* devices.h
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#pragma once
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typedef unsigned short _major_t;
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typedef unsigned short _minor_t;
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#define FHDEV(maj, min) ((((unsigned) (maj)) << (sizeof (_major_t) * 8)) | (unsigned) (min))
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#define _minor(dev) ((dev) & ((1 << (sizeof (_minor_t) * 8)) - 1))
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#define _major(dev) ((dev) >> (sizeof (_major_t) * 8))
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#include <sys/stat.h>
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#include <dirent.h>
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#include "cygheap_malloc.h"
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enum fh_devices
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{
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DEV_TTY_MAJOR = 5,
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FH_TTY = FHDEV (DEV_TTY_MAJOR, 0),
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FH_CONSOLE = FHDEV (DEV_TTY_MAJOR, 1),
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FH_PTMX = FHDEV (DEV_TTY_MAJOR, 2),
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FH_CONIN = FHDEV (DEV_TTY_MAJOR, 255),
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FH_CONOUT = FHDEV (DEV_TTY_MAJOR, 254),
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DEV_CONS_MAJOR = 3,
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FH_CONS = FHDEV (DEV_CONS_MAJOR, 0),
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FH_CONS_MAX = FHDEV (DEV_CONS_MAJOR, 127),
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DEV_PTYM_MAJOR = 128,
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FH_PTYM = FHDEV (DEV_PTYM_MAJOR, 0),
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FH_PTYM_MAX= FHDEV (DEV_PTYM_MAJOR, 255),
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DEV_PTYS_MAJOR = 136,
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FH_PTYS = FHDEV (DEV_PTYS_MAJOR, 0), /* FIXME: Should separate ttys and ptys */
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FH_PTYS_MAX= FHDEV (DEV_PTYS_MAJOR, 255), /* FIXME: Should separate ttys and ptys */
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DEV_SERIAL_MAJOR = 117,
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FH_SERIAL = FHDEV (117, 0), /* /dev/ttyS? */
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DEV_MISC_MAJOR = 13,
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FH_WINDOWS = FHDEV (DEV_MISC_MAJOR, 255),
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FH_CLIPBOARD=FHDEV (DEV_MISC_MAJOR, 254),
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/* begin /proc directories */
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DEV_VIRTFS_MAJOR = 0,
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FH_PROC_MIN_MINOR = FHDEV (DEV_VIRTFS_MAJOR, 200),
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FH_PROCSYSVIPC = FHDEV (DEV_VIRTFS_MAJOR, 249),
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FH_PROCSYS = FHDEV (DEV_VIRTFS_MAJOR, 250),
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FH_PROCESSFD = FHDEV (DEV_VIRTFS_MAJOR, 251),
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FH_PROCNET = FHDEV (DEV_VIRTFS_MAJOR, 252),
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FH_REGISTRY= FHDEV (DEV_VIRTFS_MAJOR, 253),
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FH_PROCESS = FHDEV (DEV_VIRTFS_MAJOR, 254),
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FH_PROC = FHDEV (DEV_VIRTFS_MAJOR, 255),
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FH_PROC_MAX_MINOR = FHDEV (DEV_VIRTFS_MAJOR, 255),
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/* end /proc directories */
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FH_PIPE = FHDEV (DEV_VIRTFS_MAJOR, 199),
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FH_PIPER = FHDEV (DEV_VIRTFS_MAJOR, 198),
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FH_PIPEW = FHDEV (DEV_VIRTFS_MAJOR, 197),
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FH_FIFO = FHDEV (DEV_VIRTFS_MAJOR, 196),
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FH_FS = FHDEV (DEV_VIRTFS_MAJOR, 195), /* filesystem based device */
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FH_NETDRIVE= FHDEV (DEV_VIRTFS_MAJOR, 194),
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FH_DEV = FHDEV (DEV_VIRTFS_MAJOR, 193),
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FH_CYGDRIVE= FHDEV (DEV_VIRTFS_MAJOR, 192),
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FH_SIGNALFD= FHDEV (DEV_VIRTFS_MAJOR, 13),
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FH_TIMERFD = FHDEV (DEV_VIRTFS_MAJOR, 14),
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FH_MQUEUE = FHDEV (DEV_VIRTFS_MAJOR, 15),
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DEV_FLOPPY_MAJOR = 2,
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FH_FLOPPY = FHDEV (DEV_FLOPPY_MAJOR, 0),
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DEV_CDROM_MAJOR = 11,
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FH_CDROM = FHDEV (DEV_CDROM_MAJOR, 0),
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DEV_TAPE_MAJOR = 9,
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FH_TAPE = FHDEV (DEV_TAPE_MAJOR, 0),
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FH_NTAPE = FHDEV (DEV_TAPE_MAJOR, 128),
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FH_MAXNTAPE= FHDEV (DEV_TAPE_MAJOR, 255),
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DEV_SD_MAJOR = 8,
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DEV_SD1_MAJOR = 65,
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DEV_SD2_MAJOR = 66,
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DEV_SD3_MAJOR = 67,
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DEV_SD4_MAJOR = 68,
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DEV_SD5_MAJOR = 69,
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DEV_SD6_MAJOR = 70,
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DEV_SD7_MAJOR = 71,
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DEV_SD_HIGHPART_START = 259, /* partition # > 15 */
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DEV_SD_HIGHPART_END = 284,
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FH_SD = FHDEV (DEV_SD_MAJOR, 0),
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FH_SD1 = FHDEV (DEV_SD1_MAJOR, 0),
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FH_SD2 = FHDEV (DEV_SD2_MAJOR, 0),
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FH_SD3 = FHDEV (DEV_SD3_MAJOR, 0),
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FH_SD4 = FHDEV (DEV_SD4_MAJOR, 0),
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FH_SD5 = FHDEV (DEV_SD5_MAJOR, 0),
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FH_SD6 = FHDEV (DEV_SD6_MAJOR, 0),
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FH_SD7 = FHDEV (DEV_SD7_MAJOR, 0),
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FH_SDA = FHDEV (DEV_SD_MAJOR, 0),
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FH_SDB = FHDEV (DEV_SD_MAJOR, 16),
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FH_SDC = FHDEV (DEV_SD_MAJOR, 32),
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FH_SDD = FHDEV (DEV_SD_MAJOR, 48),
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FH_SDE = FHDEV (DEV_SD_MAJOR, 64),
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FH_SDF = FHDEV (DEV_SD_MAJOR, 80),
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FH_SDG = FHDEV (DEV_SD_MAJOR, 96),
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FH_SDH = FHDEV (DEV_SD_MAJOR, 112),
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FH_SDI = FHDEV (DEV_SD_MAJOR, 128),
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FH_SDJ = FHDEV (DEV_SD_MAJOR, 144),
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FH_SDK = FHDEV (DEV_SD_MAJOR, 160),
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FH_SDL = FHDEV (DEV_SD_MAJOR, 176),
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FH_SDM = FHDEV (DEV_SD_MAJOR, 192),
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FH_SDN = FHDEV (DEV_SD_MAJOR, 208),
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FH_SDO = FHDEV (DEV_SD_MAJOR, 224),
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FH_SDP = FHDEV (DEV_SD_MAJOR, 240),
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FH_SDQ = FHDEV (DEV_SD1_MAJOR, 0),
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FH_SDR = FHDEV (DEV_SD1_MAJOR, 16),
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FH_SDS = FHDEV (DEV_SD1_MAJOR, 32),
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FH_SDT = FHDEV (DEV_SD1_MAJOR, 48),
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FH_SDU = FHDEV (DEV_SD1_MAJOR, 64),
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FH_SDV = FHDEV (DEV_SD1_MAJOR, 80),
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FH_SDW = FHDEV (DEV_SD1_MAJOR, 96),
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FH_SDX = FHDEV (DEV_SD1_MAJOR, 112),
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FH_SDY = FHDEV (DEV_SD1_MAJOR, 128),
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FH_SDZ = FHDEV (DEV_SD1_MAJOR, 144),
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FH_SDAA = FHDEV (DEV_SD1_MAJOR, 160),
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FH_SDAB = FHDEV (DEV_SD1_MAJOR, 176),
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FH_SDAC = FHDEV (DEV_SD1_MAJOR, 192),
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FH_SDAD = FHDEV (DEV_SD1_MAJOR, 208),
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FH_SDAE = FHDEV (DEV_SD1_MAJOR, 224),
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FH_SDAF = FHDEV (DEV_SD1_MAJOR, 240),
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FH_SDAG = FHDEV (DEV_SD2_MAJOR, 0),
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FH_SDAH = FHDEV (DEV_SD2_MAJOR, 16),
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FH_SDAI = FHDEV (DEV_SD2_MAJOR, 32),
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FH_SDAJ = FHDEV (DEV_SD2_MAJOR, 48),
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FH_SDAK = FHDEV (DEV_SD2_MAJOR, 64),
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FH_SDAL = FHDEV (DEV_SD2_MAJOR, 80),
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FH_SDAM = FHDEV (DEV_SD2_MAJOR, 96),
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FH_SDAN = FHDEV (DEV_SD2_MAJOR, 112),
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FH_SDAO = FHDEV (DEV_SD2_MAJOR, 128),
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FH_SDAP = FHDEV (DEV_SD2_MAJOR, 144),
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FH_SDAQ = FHDEV (DEV_SD2_MAJOR, 160),
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FH_SDAR = FHDEV (DEV_SD2_MAJOR, 176),
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FH_SDAS = FHDEV (DEV_SD2_MAJOR, 192),
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FH_SDAT = FHDEV (DEV_SD2_MAJOR, 208),
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FH_SDAU = FHDEV (DEV_SD2_MAJOR, 224),
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FH_SDAV = FHDEV (DEV_SD2_MAJOR, 240),
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FH_SDAW = FHDEV (DEV_SD3_MAJOR, 0),
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FH_SDAX = FHDEV (DEV_SD3_MAJOR, 16),
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FH_SDAY = FHDEV (DEV_SD3_MAJOR, 32),
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FH_SDAZ = FHDEV (DEV_SD3_MAJOR, 48),
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FH_SDBA = FHDEV (DEV_SD3_MAJOR, 64),
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FH_SDBB = FHDEV (DEV_SD3_MAJOR, 80),
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FH_SDBC = FHDEV (DEV_SD3_MAJOR, 96),
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FH_SDBD = FHDEV (DEV_SD3_MAJOR, 112),
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FH_SDBE = FHDEV (DEV_SD3_MAJOR, 128),
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FH_SDBF = FHDEV (DEV_SD3_MAJOR, 144),
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FH_SDBG = FHDEV (DEV_SD3_MAJOR, 160),
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FH_SDBH = FHDEV (DEV_SD3_MAJOR, 176),
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FH_SDBI = FHDEV (DEV_SD3_MAJOR, 192),
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FH_SDBJ = FHDEV (DEV_SD3_MAJOR, 208),
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FH_SDBK = FHDEV (DEV_SD3_MAJOR, 224),
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FH_SDBL = FHDEV (DEV_SD3_MAJOR, 240),
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FH_SDBM = FHDEV (DEV_SD4_MAJOR, 0),
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FH_SDBN = FHDEV (DEV_SD4_MAJOR, 16),
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FH_SDBO = FHDEV (DEV_SD4_MAJOR, 32),
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FH_SDBP = FHDEV (DEV_SD4_MAJOR, 48),
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FH_SDBQ = FHDEV (DEV_SD4_MAJOR, 64),
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FH_SDBR = FHDEV (DEV_SD4_MAJOR, 80),
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FH_SDBS = FHDEV (DEV_SD4_MAJOR, 96),
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FH_SDBT = FHDEV (DEV_SD4_MAJOR, 112),
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FH_SDBU = FHDEV (DEV_SD4_MAJOR, 128),
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FH_SDBV = FHDEV (DEV_SD4_MAJOR, 144),
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FH_SDBW = FHDEV (DEV_SD4_MAJOR, 160),
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FH_SDBX = FHDEV (DEV_SD4_MAJOR, 176),
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FH_SDBY = FHDEV (DEV_SD4_MAJOR, 192),
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FH_SDBZ = FHDEV (DEV_SD4_MAJOR, 208),
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FH_SDCA = FHDEV (DEV_SD4_MAJOR, 224),
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FH_SDCB = FHDEV (DEV_SD4_MAJOR, 240),
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FH_SDCC = FHDEV (DEV_SD5_MAJOR, 0),
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FH_SDCD = FHDEV (DEV_SD5_MAJOR, 16),
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FH_SDCE = FHDEV (DEV_SD5_MAJOR, 32),
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FH_SDCF = FHDEV (DEV_SD5_MAJOR, 48),
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FH_SDCG = FHDEV (DEV_SD5_MAJOR, 64),
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FH_SDCH = FHDEV (DEV_SD5_MAJOR, 80),
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FH_SDCI = FHDEV (DEV_SD5_MAJOR, 96),
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FH_SDCJ = FHDEV (DEV_SD5_MAJOR, 112),
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FH_SDCK = FHDEV (DEV_SD5_MAJOR, 128),
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FH_SDCL = FHDEV (DEV_SD5_MAJOR, 144),
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FH_SDCM = FHDEV (DEV_SD5_MAJOR, 160),
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FH_SDCN = FHDEV (DEV_SD5_MAJOR, 176),
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FH_SDCO = FHDEV (DEV_SD5_MAJOR, 192),
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FH_SDCP = FHDEV (DEV_SD5_MAJOR, 208),
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FH_SDCQ = FHDEV (DEV_SD5_MAJOR, 224),
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FH_SDCR = FHDEV (DEV_SD5_MAJOR, 240),
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FH_SDCS = FHDEV (DEV_SD6_MAJOR, 0),
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FH_SDCT = FHDEV (DEV_SD6_MAJOR, 16),
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FH_SDCU = FHDEV (DEV_SD6_MAJOR, 32),
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FH_SDCV = FHDEV (DEV_SD6_MAJOR, 48),
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FH_SDCW = FHDEV (DEV_SD6_MAJOR, 64),
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FH_SDCX = FHDEV (DEV_SD6_MAJOR, 80),
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FH_SDCY = FHDEV (DEV_SD6_MAJOR, 96),
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FH_SDCZ = FHDEV (DEV_SD6_MAJOR, 112),
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FH_SDDA = FHDEV (DEV_SD6_MAJOR, 128),
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FH_SDDB = FHDEV (DEV_SD6_MAJOR, 144),
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FH_SDDC = FHDEV (DEV_SD6_MAJOR, 160),
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FH_SDDD = FHDEV (DEV_SD6_MAJOR, 176),
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FH_SDDE = FHDEV (DEV_SD6_MAJOR, 192),
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FH_SDDF = FHDEV (DEV_SD6_MAJOR, 208),
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FH_SDDG = FHDEV (DEV_SD6_MAJOR, 224),
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FH_SDDH = FHDEV (DEV_SD6_MAJOR, 240),
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FH_SDDI = FHDEV (DEV_SD7_MAJOR, 0),
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FH_SDDJ = FHDEV (DEV_SD7_MAJOR, 16),
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FH_SDDK = FHDEV (DEV_SD7_MAJOR, 32),
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FH_SDDL = FHDEV (DEV_SD7_MAJOR, 48),
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FH_SDDM = FHDEV (DEV_SD7_MAJOR, 64),
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FH_SDDN = FHDEV (DEV_SD7_MAJOR, 80),
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FH_SDDO = FHDEV (DEV_SD7_MAJOR, 96),
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FH_SDDP = FHDEV (DEV_SD7_MAJOR, 112),
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FH_SDDQ = FHDEV (DEV_SD7_MAJOR, 128),
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FH_SDDR = FHDEV (DEV_SD7_MAJOR, 144),
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FH_SDDS = FHDEV (DEV_SD7_MAJOR, 160),
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FH_SDDT = FHDEV (DEV_SD7_MAJOR, 176),
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FH_SDDU = FHDEV (DEV_SD7_MAJOR, 192),
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FH_SDDV = FHDEV (DEV_SD7_MAJOR, 208),
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FH_SDDW = FHDEV (DEV_SD7_MAJOR, 224),
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FH_SDDX = FHDEV (DEV_SD7_MAJOR, 240),
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DEV_MEM_MAJOR = 1,
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FH_NULL = FHDEV (DEV_MEM_MAJOR, 3),
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FH_ZERO = FHDEV (DEV_MEM_MAJOR, 5),
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FH_FULL = FHDEV (DEV_MEM_MAJOR, 7),
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FH_RANDOM = FHDEV (DEV_MEM_MAJOR, 8),
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FH_URANDOM = FHDEV (DEV_MEM_MAJOR, 9),
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DEV_SOUND_MAJOR = 14,
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FH_OSS_DSP = FHDEV (DEV_SOUND_MAJOR, 3),
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DEV_SOCK_MAJOR = 30,
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FH_SOCKET = FHDEV (DEV_SOCK_MAJOR, 0),
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FH_INET = FHDEV (DEV_SOCK_MAJOR, 36),
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FH_UNIX = FHDEV (DEV_SOCK_MAJOR, 42),
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FH_LOCAL = FHDEV (DEV_SOCK_MAJOR, 120),
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FH_NADA = FHDEV (0, 0),
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FH_ERROR = FHDEV (255, 255) /* Set by fh constructor when error detected */
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};
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/* struct _device is required to allow the code in devices.cc autogenerated
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from devices.in continuing to work, even with a proper class device.
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We need to keep up with this as long as we use shilka to build a device
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table.
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Do not add members to device. Always add it to _device. */
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class device;
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struct _device
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{
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const char *_name;
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union __cygwin_dev
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{
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dev_t devn;
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fh_devices devn_fh_devices;
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struct
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{
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_minor_t minor;
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_major_t major;
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};
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} d;
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const char *_native;
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int (*exists_func) (const device&);
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__mode_t _mode;
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bool lives_in_dev;
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bool dev_on_fs;
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bool name_allocated;
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bool native_allocated;
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};
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class device : private _device
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{
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void parsedisk (int, int);
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void name (const char *n, bool a)
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{
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_name = (!(name_allocated = a)) ? n : cstrdup (n);
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}
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void native (const char *n, bool a)
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{
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_native = (!(native_allocated = a)) ? n : cstrdup (n);
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}
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public:
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device () { memset (this, 0, sizeof *this); }
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device (int drive, int part)
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{
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memset (this, 0, sizeof *this);
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parsedisk (drive, part);
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}
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~device ()
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{
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if (name_allocated)
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cfree ((void *) _name);
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if (native_allocated)
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cfree ((void *) _native);
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}
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const char *name () const { return _name; }
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const char *native () const { return _native; }
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__mode_t mode () const { return _mode; }
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void mode (__mode_t m) { _mode = m; }
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void name (const char *n) { name (n, false); }
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void native (const char *n) { native (n, false); }
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void dup ()
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{
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name (_name, name_allocated);
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native (_native, native_allocated);
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}
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void parse (const char *);
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void parse (_major_t major, _minor_t minor);
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void parse (dev_t dev);
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inline bool setunit (unsigned n)
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{
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d.minor = n;
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return true;
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}
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static void init ();
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static _major_t major (dev_t n)
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{
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__cygwin_dev d;
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d.devn = n;
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return d.major;
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}
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static _minor_t minor (dev_t n)
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{
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__cygwin_dev d;
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d.devn = n;
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return d.minor;
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}
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static _major_t major (int n) {return major ((dev_t) n);}
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static _minor_t minor (int n) {return minor ((dev_t) n);}
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bool is_device (dev_t n) const {return n == d.devn; }
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bool not_device (dev_t n) const {return d.devn && n != d.devn; }
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_minor_t get_minor () const {return d.minor;}
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_major_t get_major () const {return d.major;}
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dev_t get_device () const {return d.devn;}
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inline operator fh_devices () {return d.devn_fh_devices;}
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inline operator bool () {return !!d.devn;}
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inline operator dev_t& () {return d.devn;}
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device &operator = (_device _d)
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{
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memcpy (this, &_d, sizeof _d);
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dev_on_fs = name_allocated = native_allocated = false;
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return *this;
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}
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device &operator = (device &_d)
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{
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memcpy (this, &_d, sizeof _d);
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name (_d.name (), _d.name_allocated);
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native (_d.native (), _d.native_allocated);
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return *this;
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}
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fh_devices operator = (fh_devices n) {return d.devn_fh_devices = n;}
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inline void setfs (bool x) {dev_on_fs = x;}
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inline bool isfs () const {return dev_on_fs || d.devn == FH_FS;}
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inline bool is_fs_special () const {return dev_on_fs && d.devn != FH_FS;}
|
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inline bool is_dev_resident () const {return lives_in_dev;}
|
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inline int exists () const {return exists_func (*this);}
|
|
unsigned char type () const
|
|
{
|
|
if (S_ISBLK (_mode))
|
|
return DT_BLK;
|
|
return _mode >> 12;
|
|
}
|
|
};
|
|
|
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extern const _device dev_storage[];
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extern const _device *dev_storage_end;
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|
|
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extern const _device *console_dev;
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|
extern const _device *ptmx_dev;
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|
extern const _device *ptys_dev;
|
|
extern const _device *urandom_dev;
|
|
|
|
extern const _device dev_socket_storage;
|
|
#define socket_dev ((device *) &dev_socket_storage)
|
|
extern const _device dev_af_inet_storage;
|
|
#define af_inet_dev ((device *) &dev_af_inet_storage)
|
|
extern const _device dev_af_local_storage;
|
|
#define af_local_dev ((device *) &dev_af_local_storage)
|
|
extern const _device dev_af_unix_storage;
|
|
#define af_unix_dev ((device *) &dev_af_unix_storage)
|
|
|
|
extern const _device dev_signalfd_storage;
|
|
#define signalfd_dev ((device *) &dev_signalfd_storage)
|
|
extern const _device dev_timerfd_storage;
|
|
#define timerfd_dev ((device *) &dev_timerfd_storage)
|
|
extern const _device dev_mqueue_storage;
|
|
#define mqueue_dev ((device *) &dev_mqueue_storage)
|
|
extern const _device dev_piper_storage;
|
|
#define piper_dev ((device *) &dev_piper_storage)
|
|
extern const _device dev_pipew_storage;
|
|
#define pipew_dev ((device *) &dev_pipew_storage)
|
|
extern const _device dev_proc_storage;
|
|
#define proc_dev ((device *) &dev_proc_storage)
|
|
extern const _device dev_dev_storage;
|
|
#define dev_dev ((device *) &dev_dev_storage)
|
|
extern const _device dev_netdrive_storage;
|
|
#define netdrive_dev ((device *) &dev_netdrive_storage)
|
|
extern const _device dev_cygdrive_storage;
|
|
#define cygdrive_dev ((device *) &dev_cygdrive_storage)
|
|
extern const _device dev_fh_storage;
|
|
#define fh_dev ((device *) &dev_fh_storage)
|
|
extern const _device dev_fs_storage;
|
|
#define fs_dev ((device *) &dev_fs_storage)
|
|
|
|
#define isproc_dev(devn) \
|
|
(devn >= FH_PROC_MIN_MINOR && devn <= FH_PROC_MAX_MINOR)
|
|
|
|
#define iscygdrive_dev(devn) (devn == FH_CYGDRIVE)
|
|
|
|
#define isdev_dev(devn) (devn == FH_DEV)
|
|
|
|
#define isprocsys_dev(devn) (devn == FH_PROCSYS)
|
|
|
|
#define isvirtual_dev(devn) \
|
|
(isproc_dev (devn) || devn == FH_CYGDRIVE || devn == FH_NETDRIVE)
|
|
|
|
#define iscons_dev(n) \
|
|
((device::major ((dev_t) (n)) == DEV_CONS_MAJOR) \
|
|
|| (((dev_t) n) == FH_CONSOLE) \
|
|
|| (((dev_t) n) == FH_CONIN) \
|
|
|| (((dev_t) n) == FH_CONOUT))
|
|
|
|
#define istty_slave_dev(n) (device::major (n) == DEV_PTYS_MAJOR)
|