diff options
author | cvs2svn <> | 2008-12-22 22:45:57 +0300 |
---|---|---|
committer | cvs2svn <> | 2008-12-22 22:45:57 +0300 |
commit | 0f285615efa16c783821cd87a1fdabe4913da9a7 (patch) | |
tree | 0108a4b20fb3c5414c4e221ff251a92050bd104d /winsup/cygwin/flock.cc | |
parent | 272fac20e743611550c6fad64f054934da6fd4bc (diff) |
This commit was manufactured by cvs2svn to create branch 'newlib-newlib-1_17_0
1_17_0-arc'.
Sprout from master 2008-12-22 19:45:56 UTC Jeff Johnston <jjohnstn@redhat.com> ''
Cherrypick from cygnus 1999-05-03 07:29:06 UTC Richard Henderson <rth@redhat.com> '19990502 sourceware import':
README
config/mt-d30v
config/mt-netware
config/mt-ospace
etc/add-log.el
etc/add-log.vi
etc/configbuild.ein
etc/configbuild.fig
etc/configbuild.jin
etc/configbuild.tin
etc/configdev.ein
etc/configdev.fig
etc/configdev.jin
etc/configdev.tin
makefile.vms
Delete:
djunpack.bat
include/COPYING
include/COPYING3
include/ChangeLog
include/ChangeLog-9103
include/MAINTAINERS
include/alloca-conf.h
include/ansidecl.h
include/aout/ChangeLog
include/aout/adobe.h
include/aout/aout64.h
include/aout/ar.h
include/aout/dynix3.h
include/aout/encap.h
include/aout/host.h
include/aout/hp.h
include/aout/hp300hpux.h
include/aout/hppa.h
include/aout/ranlib.h
include/aout/reloc.h
include/aout/stab.def
include/aout/stab_gnu.h
include/aout/sun4.h
include/bfdlink.h
include/binary-io.h
include/bout.h
include/coff/ChangeLog
include/coff/ChangeLog-9103
include/coff/alpha.h
include/coff/apollo.h
include/coff/arm.h
include/coff/aux-coff.h
include/coff/ecoff.h
include/coff/external.h
include/coff/go32exe.h
include/coff/h8300.h
include/coff/h8500.h
include/coff/i386.h
include/coff/i860.h
include/coff/i960.h
include/coff/ia64.h
include/coff/internal.h
include/coff/m68k.h
include/coff/m88k.h
include/coff/maxq.h
include/coff/mcore.h
include/coff/mips.h
include/coff/mipspe.h
include/coff/or32.h
include/coff/pe.h
include/coff/powerpc.h
include/coff/rs6000.h
include/coff/rs6k64.h
include/coff/sh.h
include/coff/sparc.h
include/coff/sym.h
include/coff/symconst.h
include/coff/ti.h
include/coff/tic30.h
include/coff/tic4x.h
include/coff/tic54x.h
include/coff/tic80.h
include/coff/w65.h
include/coff/we32k.h
include/coff/x86_64.h
include/coff/xcoff.h
include/coff/z80.h
include/coff/z8k.h
include/demangle.h
include/dis-asm.h
include/dyn-string.h
include/elf/ChangeLog
include/elf/ChangeLog-9103
include/elf/alpha.h
include/elf/arc.h
include/elf/arm.h
include/elf/avr.h
include/elf/bfin.h
include/elf/common.h
include/elf/cr16.h
include/elf/cr16c.h
include/elf/cris.h
include/elf/crx.h
include/elf/d10v.h
include/elf/d30v.h
include/elf/dlx.h
include/elf/dwarf.h
include/elf/dwarf2.h
include/elf/external.h
include/elf/fr30.h
include/elf/frv.h
include/elf/h8.h
include/elf/hppa.h
include/elf/i370.h
include/elf/i386.h
include/elf/i860.h
include/elf/i960.h
include/elf/ia64.h
include/elf/internal.h
include/elf/ip2k.h
include/elf/iq2000.h
include/elf/m32c.h
include/elf/m32r.h
include/elf/m68hc11.h
include/elf/m68k.h
include/elf/mcore.h
include/elf/mep.h
include/elf/mips.h
include/elf/mmix.h
include/elf/mn10200.h
include/elf/mn10300.h
include/elf/msp430.h
include/elf/mt.h
include/elf/openrisc.h
include/elf/or32.h
include/elf/pj.h
include/elf/ppc.h
include/elf/ppc64.h
include/elf/reloc-macros.h
include/elf/s390.h
include/elf/score.h
include/elf/sh.h
include/elf/sparc.h
include/elf/spu.h
include/elf/v850.h
include/elf/vax.h
include/elf/vxworks.h
include/elf/x86-64.h
include/elf/xc16x.h
include/elf/xstormy16.h
include/elf/xtensa.h
include/fibheap.h
include/filenames.h
include/floatformat.h
include/fnmatch.h
include/fopen-bin.h
include/fopen-same.h
include/fopen-vms.h
include/gdb/ChangeLog
include/gdb/callback.h
include/gdb/fileio.h
include/gdb/remote-sim.h
include/gdb/signals.h
include/gdb/sim-arm.h
include/gdb/sim-cr16.h
include/gdb/sim-d10v.h
include/gdb/sim-frv.h
include/gdb/sim-h8300.h
include/gdb/sim-m32c.h
include/gdb/sim-ppc.h
include/gdb/sim-sh.h
include/gdbm.h
include/getopt.h
include/hashtab.h
include/hp-symtab.h
include/ieee.h
include/libiberty.h
include/md5.h
include/nlm/ChangeLog
include/nlm/alpha-ext.h
include/nlm/common.h
include/nlm/external.h
include/nlm/i386-ext.h
include/nlm/internal.h
include/nlm/ppc-ext.h
include/nlm/sparc32-ext.h
include/oasys.h
include/objalloc.h
include/obstack.h
include/opcode/ChangeLog
include/opcode/ChangeLog-9103
include/opcode/alpha.h
include/opcode/arc.h
include/opcode/arm.h
include/opcode/avr.h
include/opcode/bfin.h
include/opcode/cgen-bitset.h
include/opcode/cgen.h
include/opcode/convex.h
include/opcode/cr16.h
include/opcode/cris.h
include/opcode/crx.h
include/opcode/d10v.h
include/opcode/d30v.h
include/opcode/dlx.h
include/opcode/h8300.h
include/opcode/hppa.h
include/opcode/i370.h
include/opcode/i386.h
include/opcode/i860.h
include/opcode/i960.h
include/opcode/ia64.h
include/opcode/m68hc11.h
include/opcode/m68k.h
include/opcode/m88k.h
include/opcode/maxq.h
include/opcode/mips.h
include/opcode/mmix.h
include/opcode/mn10200.h
include/opcode/mn10300.h
include/opcode/msp430.h
include/opcode/np1.h
include/opcode/ns32k.h
include/opcode/or32.h
include/opcode/pdp11.h
include/opcode/pj.h
include/opcode/pn.h
include/opcode/ppc.h
include/opcode/pyr.h
include/opcode/s390.h
include/opcode/score-datadep.h
include/opcode/score-inst.h
include/opcode/sparc.h
include/opcode/spu-insns.h
include/opcode/spu.h
include/opcode/tahoe.h
include/opcode/tic30.h
include/opcode/tic4x.h
include/opcode/tic54x.h
include/opcode/tic80.h
include/opcode/v850.h
include/opcode/vax.h
include/os9k.h
include/partition.h
include/plugin-api.h
include/progress.h
include/safe-ctype.h
include/sha1.h
include/sort.h
include/splay-tree.h
include/symcat.h
include/xregex.h
include/xregex2.h
include/xtensa-config.h
include/xtensa-isa-internal.h
include/xtensa-isa.h
winsup/COPYING
winsup/CYGWIN_LICENSE
winsup/ChangeLog
winsup/Makefile.common
winsup/Makefile.in
winsup/README
winsup/acinclude.m4
winsup/aclocal.m4
winsup/configure
winsup/configure.in
winsup/cygserver/ChangeLog
winsup/cygserver/Makefile.in
winsup/cygserver/README
winsup/cygserver/aclocal.m4
winsup/cygserver/bsd_helper.cc
winsup/cygserver/bsd_helper.h
winsup/cygserver/bsd_log.cc
winsup/cygserver/bsd_log.h
winsup/cygserver/bsd_mutex.cc
winsup/cygserver/bsd_mutex.h
winsup/cygserver/client.cc
winsup/cygserver/configure
winsup/cygserver/configure.in
winsup/cygserver/cygserver-config
winsup/cygserver/cygserver.cc
winsup/cygserver/cygserver.conf
winsup/cygserver/msg.cc
winsup/cygserver/process.cc
winsup/cygserver/process.h
winsup/cygserver/sem.cc
winsup/cygserver/setpwd.cc
winsup/cygserver/shm.cc
winsup/cygserver/sysv_msg.cc
winsup/cygserver/sysv_sem.cc
winsup/cygserver/sysv_shm.cc
winsup/cygserver/threaded_queue.cc
winsup/cygserver/threaded_queue.h
winsup/cygserver/transport.cc
winsup/cygserver/transport.h
winsup/cygserver/transport_pipes.cc
winsup/cygserver/transport_pipes.h
winsup/cygserver/woutsup.h
winsup/cygwin/ChangeLog
winsup/cygwin/ChangeLog-1995
winsup/cygwin/ChangeLog-1996
winsup/cygwin/ChangeLog-1997
winsup/cygwin/ChangeLog-1998
winsup/cygwin/ChangeLog-1999
winsup/cygwin/ChangeLog-2000
winsup/cygwin/ChangeLog-2001
winsup/cygwin/ChangeLog-2002
winsup/cygwin/ChangeLog-2003
winsup/cygwin/ChangeLog-2004
winsup/cygwin/ChangeLog-2005
winsup/cygwin/ChangeLog-2006
winsup/cygwin/ChangeLog-2007
winsup/cygwin/Makefile.in
winsup/cygwin/ROADMAP
winsup/cygwin/acconfig.h
winsup/cygwin/aclocal.m4
winsup/cygwin/analyze_sigfe
winsup/cygwin/assert.cc
winsup/cygwin/autoload.cc
winsup/cygwin/automode.c
winsup/cygwin/binmode.c
winsup/cygwin/child_info.h
winsup/cygwin/config.h.in
winsup/cygwin/config/i386/profile.h
winsup/cygwin/configure
winsup/cygwin/configure.in
winsup/cygwin/cpuid.h
winsup/cygwin/crt0.c
winsup/cygwin/ctype.cc
winsup/cygwin/cxx.cc
winsup/cygwin/cygerrno.h
winsup/cygwin/cygheap.cc
winsup/cygwin/cygheap.h
winsup/cygwin/cyglsa.h
winsup/cygwin/cygmagic
winsup/cygwin/cygmalloc.h
winsup/cygwin/cygserver.h
winsup/cygwin/cygserver_ipc.h
winsup/cygwin/cygserver_msg.h
winsup/cygwin/cygserver_sem.h
winsup/cygwin/cygserver_setpwd.h
winsup/cygwin/cygserver_shm.h
winsup/cygwin/cygthread.cc
winsup/cygwin/cygthread.h
winsup/cygwin/cygtls.cc
winsup/cygwin/cygtls.h
winsup/cygwin/cygwin-shilka
winsup/cygwin/cygwin.din
winsup/cygwin/cygwin.sc
winsup/cygwin/cygwin_version.h
winsup/cygwin/dcrt0.cc
winsup/cygwin/debug.cc
winsup/cygwin/debug.h
winsup/cygwin/devices.cc
winsup/cygwin/devices.h
winsup/cygwin/devices.in
winsup/cygwin/dir.cc
winsup/cygwin/dlfcn.cc
winsup/cygwin/dll_init.cc
winsup/cygwin/dll_init.h
winsup/cygwin/dll_init.sgml
winsup/cygwin/dllfixdbg
winsup/cygwin/dlmalloc.c
winsup/cygwin/dlmalloc.h
winsup/cygwin/dtable.cc
winsup/cygwin/dtable.h
winsup/cygwin/dtable.sgml
winsup/cygwin/environ.cc
winsup/cygwin/environ.h
winsup/cygwin/errno.cc
winsup/cygwin/exceptions.cc
winsup/cygwin/exec.cc
winsup/cygwin/external.cc
winsup/cygwin/external.sgml
winsup/cygwin/fcntl.cc
winsup/cygwin/fhandler.cc
winsup/cygwin/fhandler.h
winsup/cygwin/fhandler_clipboard.cc
winsup/cygwin/fhandler_console.cc
winsup/cygwin/fhandler_disk_file.cc
winsup/cygwin/fhandler_dsp.cc
winsup/cygwin/fhandler_fifo.cc
winsup/cygwin/fhandler_floppy.cc
winsup/cygwin/fhandler_mailslot.cc
winsup/cygwin/fhandler_mem.cc
winsup/cygwin/fhandler_netdrive.cc
winsup/cygwin/fhandler_nodevice.cc
winsup/cygwin/fhandler_proc.cc
winsup/cygwin/fhandler_process.cc
winsup/cygwin/fhandler_procnet.cc
winsup/cygwin/fhandler_random.cc
winsup/cygwin/fhandler_raw.cc
winsup/cygwin/fhandler_registry.cc
winsup/cygwin/fhandler_serial.cc
winsup/cygwin/fhandler_socket.cc
winsup/cygwin/fhandler_tape.cc
winsup/cygwin/fhandler_termios.cc
winsup/cygwin/fhandler_tty.cc
winsup/cygwin/fhandler_virtual.cc
winsup/cygwin/fhandler_windows.cc
winsup/cygwin/fhandler_zero.cc
winsup/cygwin/flock.cc
winsup/cygwin/fork.cc
winsup/cygwin/gcrt0.c
winsup/cygwin/gendef
winsup/cygwin/gendevices
winsup/cygwin/gentls_offsets
winsup/cygwin/glob.cc
winsup/cygwin/gmon.c
winsup/cygwin/gmon.h
winsup/cygwin/grp.cc
winsup/cygwin/heap.cc
winsup/cygwin/heap.h
winsup/cygwin/hires.h
winsup/cygwin/hookapi.cc
winsup/cygwin/how-autoload-works.txt
winsup/cygwin/how-cygheap-works.txt
winsup/cygwin/how-cygtls-works.txt
winsup/cygwin/how-fhandlers-work.txt
winsup/cygwin/how-signals-work.txt
winsup/cygwin/how-spawn-works.txt
winsup/cygwin/how-to-debug-cygwin.txt
winsup/cygwin/how-vfork-works.txt
winsup/cygwin/include/a.out.h
winsup/cygwin/include/arpa/ftp.h
winsup/cygwin/include/arpa/inet.h
winsup/cygwin/include/arpa/nameser.h
winsup/cygwin/include/arpa/nameser_compat.h
winsup/cygwin/include/arpa/telnet.h
winsup/cygwin/include/asm/byteorder.h
winsup/cygwin/include/asm/socket.h
winsup/cygwin/include/asm/types.h
winsup/cygwin/include/attr/xattr.h
winsup/cygwin/include/byteswap.h
winsup/cygwin/include/ctype.h
winsup/cygwin/include/cygwin/_types.h
winsup/cygwin/include/cygwin/acl.h
winsup/cygwin/include/cygwin/config.h
winsup/cygwin/include/cygwin/core_dump.h
winsup/cygwin/include/cygwin/cygwin_dll.h
winsup/cygwin/include/cygwin/fs.h
winsup/cygwin/include/cygwin/grp.h
winsup/cygwin/include/cygwin/hdreg.h
winsup/cygwin/include/cygwin/icmp.h
winsup/cygwin/include/cygwin/if.h
winsup/cygwin/include/cygwin/in.h
winsup/cygwin/include/cygwin/in6.h
winsup/cygwin/include/cygwin/in_systm.h
winsup/cygwin/include/cygwin/ipc.h
winsup/cygwin/include/cygwin/kd.h
winsup/cygwin/include/cygwin/msg.h
winsup/cygwin/include/cygwin/mtio.h
winsup/cygwin/include/cygwin/rdevio.h
winsup/cygwin/include/cygwin/sem.h
winsup/cygwin/include/cygwin/shm.h
winsup/cygwin/include/cygwin/signal.h
winsup/cygwin/include/cygwin/socket.h
winsup/cygwin/include/cygwin/sockios.h
winsup/cygwin/include/cygwin/stat.h
winsup/cygwin/include/cygwin/stdlib.h
winsup/cygwin/include/cygwin/sys_time.h
winsup/cygwin/include/cygwin/sysproto.h
winsup/cygwin/include/cygwin/time.h
winsup/cygwin/include/cygwin/types.h
winsup/cygwin/include/cygwin/utmp.h
winsup/cygwin/include/cygwin/version.h
winsup/cygwin/include/cygwin/wait.h
winsup/cygwin/include/dlfcn.h
winsup/cygwin/include/elf.h
winsup/cygwin/include/endian.h
winsup/cygwin/include/err.h
winsup/cygwin/include/exceptions.h
winsup/cygwin/include/fcntl.h
winsup/cygwin/include/features.h
winsup/cygwin/include/fnmatch.h
winsup/cygwin/include/fts.h
winsup/cygwin/include/ftw.h
winsup/cygwin/include/getopt.h
winsup/cygwin/include/glob.h
winsup/cygwin/include/icmp.h
winsup/cygwin/include/ifaddrs.h
winsup/cygwin/include/inttypes.h
winsup/cygwin/include/io.h
winsup/cygwin/include/lastlog.h
winsup/cygwin/include/libgen.h
winsup/cygwin/include/limits.h
winsup/cygwin/include/machine/stdlib.h
winsup/cygwin/include/mapi.h
winsup/cygwin/include/memory.h
winsup/cygwin/include/mntent.h
winsup/cygwin/include/mqueue.h
winsup/cygwin/include/net/if.h
winsup/cygwin/include/netdb.h
winsup/cygwin/include/netinet/in.h
winsup/cygwin/include/netinet/in_systm.h
winsup/cygwin/include/netinet/ip.h
winsup/cygwin/include/netinet/ip_icmp.h
winsup/cygwin/include/netinet/tcp.h
winsup/cygwin/include/netinet/udp.h
winsup/cygwin/include/paths.h
winsup/cygwin/include/poll.h
winsup/cygwin/include/pthread.h
winsup/cygwin/include/pty.h
winsup/cygwin/include/resolv.h
winsup/cygwin/include/sched.h
winsup/cygwin/include/search.h
winsup/cygwin/include/semaphore.h
winsup/cygwin/include/stdint.h
winsup/cygwin/include/strings.h
winsup/cygwin/include/sys/acl.h
winsup/cygwin/include/sys/copying.dj
winsup/cygwin/include/sys/cygwin.h
winsup/cygwin/include/sys/dirent.h
winsup/cygwin/include/sys/elf32.h
winsup/cygwin/include/sys/elf64.h
winsup/cygwin/include/sys/elf_common.h
winsup/cygwin/include/sys/elf_generic.h
winsup/cygwin/include/sys/file.h
winsup/cygwin/include/sys/ioctl.h
winsup/cygwin/include/sys/ipc.h
winsup/cygwin/include/sys/kd.h
winsup/cygwin/include/sys/lock.h
winsup/cygwin/include/sys/mman.h
winsup/cygwin/include/sys/mount.h
winsup/cygwin/include/sys/msg.h
winsup/cygwin/include/sys/mtio.h
winsup/cygwin/include/sys/param.h
winsup/cygwin/include/sys/poll.h
winsup/cygwin/include/sys/procfs.h
winsup/cygwin/include/sys/queue.h
winsup/cygwin/include/sys/resource.h
winsup/cygwin/include/sys/select.h
winsup/cygwin/include/sys/sem.h
winsup/cygwin/include/sys/shm.h
winsup/cygwin/include/sys/smallprint.h
winsup/cygwin/include/sys/socket.h
winsup/cygwin/include/sys/soundcard.h
winsup/cygwin/include/sys/statfs.h
winsup/cygwin/include/sys/statvfs.h
winsup/cygwin/include/sys/stdio.h
winsup/cygwin/include/sys/strace.h
winsup/cygwin/include/sys/syslimits.h
winsup/cygwin/include/sys/syslog.h
winsup/cygwin/include/sys/sysmacros.h
winsup/cygwin/include/sys/sysproto.h
winsup/cygwin/include/sys/termio.h
winsup/cygwin/include/sys/termios.h
winsup/cygwin/include/sys/ttychars.h
winsup/cygwin/include/sys/uio.h
winsup/cygwin/include/sys/un.h
winsup/cygwin/include/sys/utime.h
winsup/cygwin/include/sys/utmp.h
winsup/cygwin/include/sys/utsname.h
winsup/cygwin/include/sys/vfs.h
winsup/cygwin/include/sys/wait.h
winsup/cygwin/include/sysexits.h
winsup/cygwin/include/syslog.h
winsup/cygwin/include/termio.h
winsup/cygwin/include/tzfile.h
winsup/cygwin/include/utmpx.h
winsup/cygwin/include/wait.h
winsup/cygwin/init.cc
winsup/cygwin/ioctl.cc
winsup/cygwin/ipc.cc
winsup/cygwin/kernel32.cc
winsup/cygwin/lib/_cygwin_crt0_common.cc
winsup/cygwin/lib/crt0.h
winsup/cygwin/lib/cygwin_attach_dll.c
winsup/cygwin/lib/cygwin_crt0.c
winsup/cygwin/lib/dll_entry.c
winsup/cygwin/lib/dll_main.cc
winsup/cygwin/lib/libcmain.c
winsup/cygwin/lib/premain0.c
winsup/cygwin/lib/premain1.c
winsup/cygwin/lib/premain2.c
winsup/cygwin/lib/premain3.c
winsup/cygwin/lib/pseudo-reloc.c
winsup/cygwin/libc/bsdlib.cc
winsup/cygwin/libc/fnmatch.c
winsup/cygwin/libc/fts.c
winsup/cygwin/libc/ftw.c
winsup/cygwin/libc/getopt.c
winsup/cygwin/libc/inet_addr.c
winsup/cygwin/libc/inet_network.c
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winsup/w32api/include/windef.h
winsup/w32api/include/windns.h
winsup/w32api/include/windows.h
winsup/w32api/include/windowsx.h
winsup/w32api/include/winerror.h
winsup/w32api/include/wingdi.h
winsup/w32api/include/wininet.h
winsup/w32api/include/winioctl.h
winsup/w32api/include/winldap.h
winsup/w32api/include/winnetwk.h
winsup/w32api/include/winnls.h
winsup/w32api/include/winnt.h
winsup/w32api/include/winperf.h
winsup/w32api/include/winreg.h
winsup/w32api/include/winresrc.h
winsup/w32api/include/winsnmp.h
winsup/w32api/include/winsock.h
winsup/w32api/include/winsock2.h
winsup/w32api/include/winspool.h
winsup/w32api/include/winsvc.h
winsup/w32api/include/winuser.h
winsup/w32api/include/winver.h
winsup/w32api/include/ws2spi.h
winsup/w32api/include/ws2tcpip.h
winsup/w32api/include/wsahelp.h
winsup/w32api/include/wsipx.h
winsup/w32api/include/wsnetbs.h
winsup/w32api/include/wtsapi32.h
winsup/w32api/include/wtypes.h
winsup/w32api/include/xprtdefs.h
winsup/w32api/include/zmouse.h
winsup/w32api/install-sh
winsup/w32api/lib/Makefile.in
winsup/w32api/lib/aclui.def
winsup/w32api/lib/advapi32.def
winsup/w32api/lib/ativscp-uuid.c
winsup/w32api/lib/avicap32.def
winsup/w32api/lib/avifil32.def
winsup/w32api/lib/bthprops.def
winsup/w32api/lib/cap.def
winsup/w32api/lib/cguid-uuid.c
winsup/w32api/lib/comcat-uuid.c
winsup/w32api/lib/comctl32.def
winsup/w32api/lib/comdlg32.def
winsup/w32api/lib/crypt32.def
winsup/w32api/lib/ctl3d32.def
winsup/w32api/lib/ddk/Makefile.in
winsup/w32api/lib/ddk/apcups.def
winsup/w32api/lib/ddk/cfgmgr32.def
winsup/w32api/lib/ddk/dxapi.def
winsup/w32api/lib/ddk/hal.def
winsup/w32api/lib/ddk/hid.def
winsup/w32api/lib/ddk/hidparse.def
winsup/w32api/lib/ddk/mcd.def
winsup/w32api/lib/ddk/ndis.def
winsup/w32api/lib/ddk/newdev.def
winsup/w32api/lib/ddk/ntoskrnl.def
winsup/w32api/lib/ddk/scsiport.def
winsup/w32api/lib/ddk/tdi.def
winsup/w32api/lib/ddk/usbcamd.def
winsup/w32api/lib/ddk/usbcamd2.def
winsup/w32api/lib/ddk/videoprt.def
winsup/w32api/lib/ddk/win32k.def
winsup/w32api/lib/devguid.c
winsup/w32api/lib/dhcpcsvc.def
winsup/w32api/lib/directx/Makefile.in
winsup/w32api/lib/directx/d3d8.def
winsup/w32api/lib/directx/d3d9.def
winsup/w32api/lib/directx/d3dim.def
winsup/w32api/lib/directx/d3drm.def
winsup/w32api/lib/directx/d3dx8d.def
winsup/w32api/lib/directx/d3dx9d.def
winsup/w32api/lib/directx/d3dxof.def
winsup/w32api/lib/directx/ddraw.def
winsup/w32api/lib/directx/dinput.def
winsup/w32api/lib/directx/dinput8.def
winsup/w32api/lib/directx/dinput_joy.c
winsup/w32api/lib/directx/dinput_joy2.c
winsup/w32api/lib/directx/dinput_kbd.c
winsup/w32api/lib/directx/dinput_mouse.c
winsup/w32api/lib/directx/dinput_mouse2.c
winsup/w32api/lib/directx/dinput_private.h
winsup/w32api/lib/directx/dmoguids.c
winsup/w32api/lib/directx/dplayx.def
winsup/w32api/lib/directx/dpnaddr.def
winsup/w32api/lib/directx/dpnet.def
winsup/w32api/lib/directx/dpnlobby.def
winsup/w32api/lib/directx/dpvoice.def
winsup/w32api/lib/directx/dsetup.def
winsup/w32api/lib/directx/dsound.def
winsup/w32api/lib/directx/dxerr.c
winsup/w32api/lib/directx/dxerr8.c
winsup/w32api/lib/directx/dxerr8w.c
winsup/w32api/lib/directx/dxerr9.c
winsup/w32api/lib/directx/dxerr9w.c
winsup/w32api/lib/directx/dxguid.c
winsup/w32api/lib/directx/ksproxy.def
winsup/w32api/lib/directx/ksuser.c
winsup/w32api/lib/directx/ksuser.def
winsup/w32api/lib/directx/msdmo.def
winsup/w32api/lib/directx/strmiids.c
winsup/w32api/lib/directx/test.c
winsup/w32api/lib/dlcapi.def
winsup/w32api/lib/dnsapi.def
winsup/w32api/lib/docobj-uuid.c
winsup/w32api/lib/exdisp-uuid.c
winsup/w32api/lib/extras-uuid.c
winsup/w32api/lib/faultrep.def
winsup/w32api/lib/gdi32.def
winsup/w32api/lib/glaux.def
winsup/w32api/lib/glu32.def
winsup/w32api/lib/hlguids-uuid.c
winsup/w32api/lib/hlink-uuid.c
winsup/w32api/lib/icmui.def
winsup/w32api/lib/igmpagnt.def
winsup/w32api/lib/imagehlp.def
winsup/w32api/lib/imm32.def
winsup/w32api/lib/iphlpapi.def
winsup/w32api/lib/kernel32.def
winsup/w32api/lib/largeint.c
winsup/w32api/lib/lz32.def
winsup/w32api/lib/mapi32.def
winsup/w32api/lib/mfcuia32.def
winsup/w32api/lib/mgmtapi.def
winsup/w32api/lib/mlang-uuid.c
winsup/w32api/lib/mpr.def
winsup/w32api/lib/mprapi.def
winsup/w32api/lib/mqrt.def
winsup/w32api/lib/msacm32.def
winsup/w32api/lib/mscms.def
winsup/w32api/lib/mshtml-uuid.c
winsup/w32api/lib/msimg32.def
winsup/w32api/lib/msvcp60.def
winsup/w32api/lib/msvfw32.def
winsup/w32api/lib/mswsock.def
winsup/w32api/lib/msxml-uuid.c
winsup/w32api/lib/nddeapi.def
winsup/w32api/lib/netapi32.def
winsup/w32api/lib/ntdll.def
winsup/w32api/lib/oaidl-uuid.c
winsup/w32api/lib/objidl-uuid.c
winsup/w32api/lib/objsafe-uuid.c
winsup/w32api/lib/ocidl-uuid.c
winsup/w32api/lib/odbc32.def
winsup/w32api/lib/odbccp32.def
winsup/w32api/lib/ole32.def
winsup/w32api/lib/oleacc-uuid.c
winsup/w32api/lib/oleacc.def
winsup/w32api/lib/oleaut32.def
winsup/w32api/lib/olecli32.def
winsup/w32api/lib/olectlid-uuid.c
winsup/w32api/lib/oledlg.def
winsup/w32api/lib/oleidl-uuid.c
winsup/w32api/lib/olepro32.def
winsup/w32api/lib/olesvr32.def
winsup/w32api/lib/opengl32.def
winsup/w32api/lib/penwin32.def
winsup/w32api/lib/pkpd32.def
winsup/w32api/lib/power-uuid.c
winsup/w32api/lib/powrprof.def
winsup/w32api/lib/psapi.def
winsup/w32api/lib/quartz.def
winsup/w32api/lib/rapi.def
winsup/w32api/lib/rasapi32.def
winsup/w32api/lib/rasdlg.def
winsup/w32api/lib/res.rc
winsup/w32api/lib/rpcdce4.def
winsup/w32api/lib/rpcns4.def
winsup/w32api/lib/rpcrt4.def
winsup/w32api/lib/rtm.def
winsup/w32api/lib/rtutils.def
winsup/w32api/lib/scrnsave.c
winsup/w32api/lib/secur32.def
winsup/w32api/lib/servprov-uuid.c
winsup/w32api/lib/setupapi.def
winsup/w32api/lib/shell32.c
winsup/w32api/lib/shell32.def
winsup/w32api/lib/shfolder.def
winsup/w32api/lib/shlwapi.def
winsup/w32api/lib/snmpapi.def
winsup/w32api/lib/svrapi.def
winsup/w32api/lib/tapi32.def
winsup/w32api/lib/test.c
winsup/w32api/lib/th32.def
winsup/w32api/lib/thunk32.def
winsup/w32api/lib/unknwn-uuid.c
winsup/w32api/lib/url.def
winsup/w32api/lib/urlmon-uuid.c
winsup/w32api/lib/user32.def
winsup/w32api/lib/userenv.def
winsup/w32api/lib/usp10.def
winsup/w32api/lib/uxtheme.def
winsup/w32api/lib/vdmdbg.def
winsup/w32api/lib/version.def
winsup/w32api/lib/vfw32.mri
winsup/w32api/lib/win32spl.def
winsup/w32api/lib/wininet.def
winsup/w32api/lib/winmm.def
winsup/w32api/lib/winspool.def
winsup/w32api/lib/winstrm.def
winsup/w32api/lib/wldap32.def
winsup/w32api/lib/wow32.def
winsup/w32api/lib/ws2_32.c
winsup/w32api/lib/ws2_32.def
winsup/w32api/lib/wsnmp32.def
winsup/w32api/lib/wsock32.def
winsup/w32api/lib/wst.def
winsup/w32api/lib/wtsapi32.def
Diffstat (limited to 'winsup/cygwin/flock.cc')
-rw-r--r-- | winsup/cygwin/flock.cc | 1504 |
1 files changed, 0 insertions, 1504 deletions
diff --git a/winsup/cygwin/flock.cc b/winsup/cygwin/flock.cc deleted file mode 100644 index 42941cb78..000000000 --- a/winsup/cygwin/flock.cc +++ /dev/null @@ -1,1504 +0,0 @@ -/* flock.cc. NT specific implementation of advisory file locking. - - Copyright 2003, 2008 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. */ - -/* The basic mechanism as well as the datastructures used in the below - implementation are taken from the FreeBSD repository on 2008-03-18. - The essential code of the lf_XXX functions has been taken from the - module src/sys/kern/kern_lockf.c. It has been adapted to use NT - global namespace subdirs and event objects for synchronization - purposes. - - So, the following copyright applies to most of the code in the lf_XXX - functions. - - * Copyright (c) 1982, 1986, 1989, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Scooter Morris at Genentech Inc. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)ufs_lockf.c 8.3 (Berkeley) 1/6/94 -*/ - -/* - * The flock() function is based upon source taken from the Red Hat - * implementation used in their imap-2002d SRPM. - * - * $RH: flock.c,v 1.2 2000/08/23 17:07:00 nalin Exp $ - */ - -/* The lockf function is based upon FreeBSD sources with the following - * copyright. - * - * Copyright (c) 1997 The NetBSD Foundation, Inc. - * All rights reserved. - * - * This code is derived from software contributed to The NetBSD Foundation - * by Klaus Klein. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the NetBSD - * Foundation, Inc. and its contributors. - * 4. Neither the name of The NetBSD Foundation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS - * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED - * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS - * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - * - * $NetBSD: lockf.c,v 1.1 1997/12/20 20:23:18 kleink Exp $ -*/ - -#include "winsup.h" -#include <assert.h> -#include <sys/file.h> -#include <unistd.h> -#include <stdlib.h> -#include "cygerrno.h" -#include "security.h" -#include "shared_info.h" -#include "path.h" -#include "fhandler.h" -#include "dtable.h" -#include "cygheap.h" -#include "pinfo.h" -#include "sigproc.h" -#include "cygtls.h" -#include "tls_pbuf.h" -#include "ntdll.h" -#include <sys/queue.h> -#include <wchar.h> - -#define F_WAIT 0x10 /* Wait until lock is granted */ -#define F_FLOCK 0x20 /* Use flock(2) semantics for lock */ -#define F_POSIX 0x40 /* Use POSIX semantics for lock */ - -#ifndef OFF_MAX -#define OFF_MAX LLONG_MAX -#endif - -static NO_COPY muto lockf_guard; - -#define INODE_LIST_LOCK() (lockf_guard.init ("lockf_guard")->acquire ()) -#define INODE_LIST_UNLOCK() (lockf_guard.release ()) - -#define LOCK_OBJ_NAME_LEN 64 - -#define FLOCK_INODE_DIR_ACCESS (DIRECTORY_QUERY \ - | DIRECTORY_TRAVERSE \ - | DIRECTORY_CREATE_OBJECT \ - | READ_CONTROL) - -#define FLOCK_EVENT_ACCESS (EVENT_QUERY_STATE \ - | SYNCHRONIZE \ - | READ_CONTROL) - -/* This function takes the own process security descriptor DACL and adds - SYNCHRONIZE permissions for everyone. This allows all processes - to wait for this process to die when blocking in a F_SETLKW on a lock - which is hold by this process. */ -static void -allow_others_to_sync () -{ - static NO_COPY bool done; - - if (done) - return; - - NTSTATUS status; - PACL dacl; - LPVOID ace; - ULONG len; - - /* Get this process DACL. We use a temporary path buffer in TLS space - to avoid having to alloc 64K from the stack. */ - tmp_pathbuf tp; - PSECURITY_DESCRIPTOR sd = (PSECURITY_DESCRIPTOR) tp.w_get (); - status = NtQuerySecurityObject (hMainProc, DACL_SECURITY_INFORMATION, sd, - NT_MAX_PATH * sizeof (WCHAR), &len); - if (!NT_SUCCESS (status)) - { - debug_printf ("NtQuerySecurityObject: %p", status); - return; - } - /* Create a valid dacl pointer and set it's size to be as big as - there's room in the temporary buffer. Note that the descriptor - is in self-relative format. */ - dacl = (PACL) ((char *) sd + (uintptr_t) sd->Dacl); - dacl->AclSize = NT_MAX_PATH * sizeof (WCHAR) - ((char *) dacl - (char *) sd); - /* Allow everyone to SYNCHRONIZE with this process. */ - if (!AddAccessAllowedAce (dacl, ACL_REVISION, SYNCHRONIZE, - well_known_world_sid)) - { - debug_printf ("AddAccessAllowedAce: %lu", GetLastError ()); - return; - } - /* Set the size of the DACL correctly. */ - if (!FindFirstFreeAce (dacl, &ace)) - { - debug_printf ("FindFirstFreeAce: %lu", GetLastError ()); - return; - } - dacl->AclSize = (char *) ace - (char *) dacl; - /* Write the DACL back. */ - status = NtSetSecurityObject (hMainProc, DACL_SECURITY_INFORMATION, sd); - if (!NT_SUCCESS (status)) - { - debug_printf ("NtSetSecurityObject: %p", status); - return; - } - done = true; -} - -/* Get the handle count of an object. */ -static ULONG -get_obj_handle_count (HANDLE h) -{ - OBJECT_BASIC_INFORMATION obi; - NTSTATUS status; - ULONG hdl_cnt = 0; - - status = NtQueryObject (h, ObjectBasicInformation, &obi, sizeof obi, NULL); - if (!NT_SUCCESS (status)) - debug_printf ("NtQueryObject: %p\n", status); - else - hdl_cnt = obi.HandleCount; - return hdl_cnt; -} - -/* Per lock class. */ -class lockf_t -{ - public: - short lf_flags; /* Semantics: F_POSIX, F_FLOCK, F_WAIT */ - short lf_type; /* Lock type: F_RDLCK, F_WRLCK */ - _off64_t lf_start; /* Byte # of the start of the lock */ - _off64_t lf_end; /* Byte # of the end of the lock (-1=EOF) */ - long long lf_id; /* Cygwin PID for POSIX locks, a unique id per - file table entry for BSD flock locks. */ - DWORD lf_wid; /* Win PID of the resource holding the lock */ - class lockf_t **lf_head; /* Back pointer to the head of the lockf_t list */ - class inode_t *lf_inode; /* Back pointer to the inode_t */ - class lockf_t *lf_next; /* Pointer to the next lock on this inode_t */ - HANDLE lf_obj; /* Handle to the lock event object. */ - - lockf_t () - : lf_flags (0), lf_type (0), lf_start (0), lf_end (0), lf_id (0), - lf_wid (0), lf_head (NULL), lf_inode (NULL), - lf_next (NULL), lf_obj (NULL) - {} - lockf_t (class inode_t *node, class lockf_t **head, short flags, short type, - _off64_t start, _off64_t end, long long id, DWORD wid) - : lf_flags (flags), lf_type (type), lf_start (start), lf_end (end), - lf_id (id), lf_wid (wid), lf_head (head), lf_inode (node), - lf_next (NULL), lf_obj (NULL) - {} - ~lockf_t (); - - /* Used to create all locks list in a given TLS buffer. */ - void *operator new (size_t size, void *p) - { return p; } - /* Used to store own lock list in the cygheap. */ - void *operator new (size_t size) - { return cmalloc (HEAP_FHANDLER, sizeof (lockf_t)); } - /* Never call on node->i_all_lf! */ - void operator delete (void *p) - { cfree (p); } - - void create_lock_obj (); - bool open_lock_obj (); - void del_lock_obj (HANDLE fhdl, bool signal = false); -}; - -/* Per inode_t class */ -class inode_t -{ - friend class lockf_t; - - public: - LIST_ENTRY (inode_t) i_next; - lockf_t *i_lockf; /* List of locks of this process. */ - lockf_t *i_all_lf; /* Temp list of all locks for this file. */ - - __dev32_t i_dev; /* Device ID */ - __ino64_t i_ino; /* inode number */ - - private: - HANDLE i_dir; - HANDLE i_mtx; - - public: - inode_t (__dev32_t dev, __ino64_t ino); - ~inode_t (); - - void *operator new (size_t size) - { return cmalloc (HEAP_FHANDLER, sizeof (inode_t)); } - void operator delete (void *p) - { cfree (p); } - - static inode_t *get (__dev32_t dev, __ino64_t ino, bool create_if_missing); - - void LOCK () { WaitForSingleObject (i_mtx, INFINITE); } - void UNLOCK () { ReleaseMutex (i_mtx); } - - lockf_t *get_all_locks_list (); - - bool del_my_locks (long long id, HANDLE fhdl); -}; - -inode_t::~inode_t () -{ - lockf_t *lock, *n_lock; - for (lock = i_lockf; lock && (n_lock = lock->lf_next, 1); lock = n_lock) - delete lock; - NtClose (i_mtx); - NtClose (i_dir); -} - -bool -inode_t::del_my_locks (long long id, HANDLE fhdl) -{ - lockf_t *lock, *n_lock; - lockf_t **prev = &i_lockf; - int lc = 0; - for (lock = *prev; lock && (n_lock = lock->lf_next, 1); lock = n_lock) - { - if (lock->lf_flags & F_POSIX) - { - /* Delete all POSIX locks. */ - *prev = n_lock; - ++lc; - delete lock; - } - else if (id && lock->lf_id == id) - { - int cnt = 0; - cygheap_fdenum cfd (true); - while (cfd.next () >= 0) - if (cfd->get_unique_id () == lock->lf_id && ++cnt > 1) - break; - /* Delete BSD flock lock when no other fd in this process references - it anymore. */ - if (cnt <= 1) - { - *prev = n_lock; - lock->del_lock_obj (fhdl); - delete lock; - } - } - else - prev = &lock->lf_next; - } - return i_lockf == NULL; -} - -/* Used to delete the locks on a file hold by this process. Called from - close(2) and fixup_after_fork, as well as from fixup_after_exec in - case the close_on_exec flag is set. The whole inode is deleted as - soon as no lock exists on it anymore. */ -void -fhandler_base::del_my_locks (bool after_fork) -{ - INODE_LIST_LOCK (); - inode_t *node = inode_t::get (get_dev (), get_ino (), false); - if (node) - { - bool no_locks_left = - node->del_my_locks (after_fork ? 0 : get_unique_id (), get_handle ()); - if (no_locks_left) - { - LIST_REMOVE (node, i_next); - node->UNLOCK (); - delete node; - } - else - node->UNLOCK (); - } - INODE_LIST_UNLOCK (); -} - -/* Called in an execed child. The exec'ed process must allow SYNCHRONIZE - access to everyone if at least one inode exists. - The lock owner's Windows PID changed and all POSIX lock event objects - have to be relabeled so that waiting processes know which process to - wait on. If the node has been abandoned due to close_on_exec on the - referencing fhandlers, remove the inode entirely. */ -void -fixup_lockf_after_exec () -{ - inode_t *node, *next_node; - - INODE_LIST_LOCK (); - if (LIST_FIRST (&cygheap->inode_list)) - allow_others_to_sync (); - LIST_FOREACH_SAFE (node, &cygheap->inode_list, i_next, next_node) - { - int cnt = 0; - cygheap_fdenum cfd (true); - while (cfd.next () >= 0) - if (cfd->get_dev () == node->i_dev - && cfd->get_ino () == node->i_ino - && ++cnt > 1) - break; - if (cnt == 0) - { - LIST_REMOVE (node, i_next); - delete node; - } - else - { - node->LOCK (); - for (lockf_t *lock = node->i_lockf; lock; lock = lock->lf_next) - if (lock->lf_flags & F_POSIX) - { - lock->del_lock_obj (NULL); - lock->lf_wid = myself->dwProcessId; - lock->create_lock_obj (); - } - node->UNLOCK (); - } - } - INODE_LIST_UNLOCK (); -} - -/* static method to return a pointer to the inode_t structure for a specific - file. The file is specified by the device and inode_t number. If inode_t - doesn't exist, create it. */ -inode_t * -inode_t::get (__dev32_t dev, __ino64_t ino, bool create_if_missing) -{ - inode_t *node; - - INODE_LIST_LOCK (); - LIST_FOREACH (node, &cygheap->inode_list, i_next) - if (node->i_dev == dev && node->i_ino == ino) - break; - if (!node && create_if_missing) - { - node = new inode_t (dev, ino); - if (node) - LIST_INSERT_HEAD (&cygheap->inode_list, node, i_next); - } - if (node) - node->LOCK (); - INODE_LIST_UNLOCK (); - return node; -} - -inode_t::inode_t (__dev32_t dev, __ino64_t ino) -: i_lockf (NULL), i_all_lf (NULL), i_dev (dev), i_ino (ino) -{ - HANDLE parent_dir; - WCHAR name[48]; - UNICODE_STRING uname; - OBJECT_ATTRIBUTES attr; - NTSTATUS status; - - parent_dir = get_shared_parent_dir (); - /* Create a subdir which is named after the device and inode_t numbers - of the given file, in hex notation. */ - int len = __small_swprintf (name, L"flock-%08x-%016X", dev, ino); - RtlInitCountedUnicodeString (&uname, name, len * sizeof (WCHAR)); - InitializeObjectAttributes (&attr, &uname, OBJ_INHERIT | OBJ_OPENIF, - parent_dir, everyone_sd (FLOCK_INODE_DIR_ACCESS)); - status = NtCreateDirectoryObject (&i_dir, FLOCK_INODE_DIR_ACCESS, &attr); - if (!NT_SUCCESS (status)) - api_fatal ("NtCreateDirectoryObject(inode): %p", status); - /* Create a mutex object in the file specific dir, which is used for - access synchronization on the dir and its objects. */ - RtlInitUnicodeString (&uname, L"mtx"); - InitializeObjectAttributes (&attr, &uname, OBJ_INHERIT | OBJ_OPENIF, i_dir, - everyone_sd (CYG_MUTANT_ACCESS)); - status = NtCreateMutant (&i_mtx, CYG_MUTANT_ACCESS, &attr, FALSE); - if (!NT_SUCCESS (status)) - api_fatal ("NtCreateMutant(inode): %p", status); -} - -/* Enumerate all lock event objects for this file and create a lockf_t - list in the i_all_lf member. This list is searched in lf_getblock - for locks which potentially block our lock request. */ - -/* Number of lockf_t structs which fit in the temporary buffer. */ -#define MAX_LOCKF_CNT ((intptr_t)((NT_MAX_PATH * sizeof (WCHAR)) \ - / sizeof (lockf_t))) - -lockf_t * -inode_t::get_all_locks_list () -{ - struct fdbi - { - DIRECTORY_BASIC_INFORMATION dbi; - WCHAR buf[2][NAME_MAX + 1]; - } f; - ULONG context; - NTSTATUS status; - lockf_t *lock = i_all_lf; - - for (BOOLEAN restart = TRUE; - NT_SUCCESS (status = NtQueryDirectoryObject (i_dir, &f, sizeof f, TRUE, - restart, &context, NULL)); - restart = FALSE) - { - if (f.dbi.ObjectName.Length != LOCK_OBJ_NAME_LEN * sizeof (WCHAR)) - continue; - wchar_t *wc = f.dbi.ObjectName.Buffer, *endptr; - /* "%02x-%01x-%016X-%016X-%016X-%08x", - lf_flags, lf_type, lf_start, lf_end, lf_id, lf_wid */ - wc[LOCK_OBJ_NAME_LEN] = L'\0'; - short flags = wcstol (wc, &endptr, 16); - if ((flags & ~(F_FLOCK | F_POSIX)) != 0 - || ((flags & (F_FLOCK | F_POSIX)) == (F_FLOCK | F_POSIX))) - continue; - short type = wcstol (endptr + 1, &endptr, 16); - if ((type != F_RDLCK && type != F_WRLCK) || !endptr || *endptr != L'-') - continue; - _off64_t start = (_off64_t) wcstoull (endptr + 1, &endptr, 16); - if (start < 0 || !endptr || *endptr != L'-') - continue; - _off64_t end = (_off64_t) wcstoull (endptr + 1, &endptr, 16); - if (end < -1LL || (end > 0 && end < start) || !endptr || *endptr != L'-') - continue; - long long id = wcstoll (endptr + 1, &endptr, 16); - if (!endptr || *endptr != L'-' - || ((flags & F_POSIX) && (id < 1 || id > ULONG_MAX))) - continue; - DWORD wid = wcstoul (endptr + 1, &endptr, 16); - if (endptr && *endptr != L'\0') - continue; - if (lock - i_all_lf >= MAX_LOCKF_CNT) - { - system_printf ("Warning, can't handle more than %d locks per file.", - MAX_LOCKF_CNT); - break; - } - if (lock > i_all_lf) - lock[-1].lf_next = lock; - new (lock++) lockf_t (this, &i_all_lf, flags, type, start, end, id, wid); - } - /* If no lock has been found, return NULL. */ - if (lock == i_all_lf) - return NULL; - return i_all_lf; -} - -/* Create the lock event object in the file's subdir in the NT global - namespace. The name is constructed from the lock properties which - identify it uniquely, all values in hex. See the __small_swprintf - call right at the start. */ -void -lockf_t::create_lock_obj () -{ - WCHAR name[LOCK_OBJ_NAME_LEN + 1]; - UNICODE_STRING uname; - OBJECT_ATTRIBUTES attr; - NTSTATUS status; - - __small_swprintf (name, L"%02x-%01x-%016X-%016X-%016X-%08x", - lf_flags & (F_POSIX | F_FLOCK), lf_type, lf_start, - lf_end, lf_id, lf_wid); - RtlInitCountedUnicodeString (&uname, name, - LOCK_OBJ_NAME_LEN * sizeof (WCHAR)); - InitializeObjectAttributes (&attr, &uname, OBJ_INHERIT, lf_inode->i_dir, - everyone_sd (FLOCK_EVENT_ACCESS)); - status = NtCreateEvent (&lf_obj, CYG_EVENT_ACCESS, &attr, - NotificationEvent, FALSE); - if (!NT_SUCCESS (status)) - api_fatal ("NtCreateEvent(lock): %p", status); -} - -/* Open a lock event object for SYNCHRONIZE access (to wait for it). */ -bool -lockf_t::open_lock_obj () -{ - WCHAR name[LOCK_OBJ_NAME_LEN + 1]; - UNICODE_STRING uname; - OBJECT_ATTRIBUTES attr; - NTSTATUS status; - - __small_swprintf (name, L"%02x-%01x-%016X-%016X-%016X-%08x", - lf_flags & (F_POSIX | F_FLOCK), lf_type, lf_start, - lf_end, lf_id, lf_wid); - RtlInitCountedUnicodeString (&uname, name, - LOCK_OBJ_NAME_LEN * sizeof (WCHAR)); - InitializeObjectAttributes (&attr, &uname, 0, lf_inode->i_dir, NULL); - status = NtOpenEvent (&lf_obj, FLOCK_EVENT_ACCESS, &attr); - if (!NT_SUCCESS (status)) - { - SetLastError (RtlNtStatusToDosError (status)); - lf_obj = NULL; /* Paranoia... */ - } - return lf_obj != NULL; -} - -/* Close a lock event handle. The important thing here is to signal it - before closing the handle. This way all threads waiting for this - lock can wake up. */ -void -lockf_t::del_lock_obj (HANDLE fhdl, bool signal) -{ - if (lf_obj) - { - /* Only signal the event if it's either a POSIX lock, or, in case of - BSD flock locks, if it's an explicit unlock or if the calling fhandler - holds the last reference to the file table entry. The file table - entry in UNIX terms is equivalent to the FILE_OBJECT in Windows NT - terms. It's what the handle/descriptor references when calling - CreateFile/open. Calling DuplicateHandle/dup only creates a new - handle/descriptor to the same FILE_OBJECT/file table entry. */ - if ((lf_flags & F_POSIX) || signal - || (fhdl && get_obj_handle_count (fhdl) <= 1)) - SetEvent (lf_obj); - NtClose (lf_obj); - lf_obj = NULL; - } -} - -lockf_t::~lockf_t () -{ - del_lock_obj (NULL); -} - -/* - * This variable controls the maximum number of processes that will - * be checked in doing deadlock detection. - */ -#ifndef __CYGWIN__ -#define MAXDEPTH 50 -static int maxlockdepth = MAXDEPTH; -#endif - -#define NOLOCKF (struct lockf_t *)0 -#define SELF 0x1 -#define OTHERS 0x2 -static int lf_clearlock (lockf_t *, lockf_t **, HANDLE); -static int lf_findoverlap (lockf_t *, lockf_t *, int, lockf_t ***, lockf_t **); -static lockf_t *lf_getblock (lockf_t *, inode_t *node); -static int lf_getlock (lockf_t *, inode_t *, struct __flock64 *); -static int lf_setlock (lockf_t *, inode_t *, lockf_t **, HANDLE); -static void lf_split (lockf_t *, lockf_t *, lockf_t **); -static void lf_wakelock (lockf_t *, HANDLE); - -int -fhandler_disk_file::lock (int a_op, struct __flock64 *fl) -{ - _off64_t start, end, oadd; - lockf_t *n; - int error = 0; - - short a_flags = fl->l_type & (F_POSIX | F_FLOCK); - short type = fl->l_type & (F_RDLCK | F_WRLCK | F_UNLCK); - - if (!a_flags) - a_flags = F_POSIX; /* default */ - if (a_op == F_SETLKW) - { - a_op = F_SETLK; - a_flags |= F_WAIT; - } - if (a_op == F_SETLK) - switch (type) - { - case F_UNLCK: - a_op = F_UNLCK; - break; - case F_RDLCK: - if (!(get_access () & GENERIC_READ)) - { - set_errno (EBADF); - return -1; - } - break; - case F_WRLCK: - if (!(get_access () & GENERIC_WRITE)) - { - set_errno (EBADF); - return -1; - } - break; - default: - set_errno (EINVAL); - return -1; - } - - /* - * Convert the flock structure into a start and end. - */ - switch (fl->l_whence) - { - case SEEK_SET: - start = fl->l_start; - break; - - case SEEK_CUR: - if ((start = lseek (0, SEEK_CUR)) == ILLEGAL_SEEK) - return -1; - break; - - case SEEK_END: - { - NTSTATUS status; - IO_STATUS_BLOCK io; - FILE_STANDARD_INFORMATION fsi; - - status = NtQueryInformationFile (get_handle (), &io, &fsi, sizeof fsi, - FileStandardInformation); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - return -1; - } - if (fl->l_start > 0 && fsi.EndOfFile.QuadPart > OFF_MAX - fl->l_start) - { - set_errno (EOVERFLOW); - return -1; - } - start = fsi.EndOfFile.QuadPart + fl->l_start; - } - break; - - default: - return (EINVAL); - } - if (start < 0) - { - set_errno (EINVAL); - return -1; - } - if (fl->l_len < 0) - { - if (start == 0) - { - set_errno (EINVAL); - return -1; - } - end = start - 1; - start += fl->l_len; - if (start < 0) - { - set_errno (EINVAL); - return -1; - } - } - else if (fl->l_len == 0) - end = -1; - else - { - oadd = fl->l_len - 1; - if (oadd > OFF_MAX - start) - { - set_errno (EOVERFLOW); - return -1; - } - end = start + oadd; - } - - inode_t *node = inode_t::get (get_dev (), get_ino (), true); - if (!node) - { - set_errno (ENOLCK); - return -1; - } - need_fork_fixup (true); - - /* Unlock the fd table which has been locked in fcntl_worker/lock_worker, - otherwise a blocking F_SETLKW never wakes up on a signal. */ - cygheap->fdtab.unlock (); - - lockf_t **head = &node->i_lockf; - - /* - * Avoid the common case of unlocking when inode_t has no locks. - */ - if (*head == NULL) - { - if (a_op != F_SETLK) - { - node->UNLOCK (); - fl->l_type = F_UNLCK; - return 0; - } - } - /* - * Allocate a spare structure in case we have to split. - */ - lockf_t *clean = NULL; - if (a_op == F_SETLK || a_op == F_UNLCK) - { - clean = new lockf_t (); - if (!clean) - { - node->UNLOCK (); - set_errno (ENOLCK); - return -1; - } - } - /* - * Create the lockf_t structure - */ - lockf_t *lock = new lockf_t (node, head, a_flags, type, start, end, - (a_flags & F_FLOCK) ? get_unique_id () - : getpid (), - myself->dwProcessId); - if (!lock) - { - node->UNLOCK (); - set_errno (ENOLCK); - return -1; - } - - switch (a_op) - { - case F_SETLK: - error = lf_setlock (lock, node, &clean, get_handle ()); - break; - - case F_UNLCK: - error = lf_clearlock (lock, &clean, get_handle ()); - lock->lf_next = clean; - clean = lock; - break; - - case F_GETLK: - error = lf_getlock (lock, node, fl); - lock->lf_next = clean; - clean = lock; - break; - - default: - lock->lf_next = clean; - clean = lock; - error = EINVAL; - break; - } - for (lock = clean; lock != NULL; ) - { - n = lock->lf_next; - lock->del_lock_obj (get_handle (), a_op == F_UNLCK); - delete lock; - lock = n; - } - if (node->i_lockf == NULL) - { - INODE_LIST_LOCK (); - LIST_REMOVE (node, i_next); - node->UNLOCK (); - delete node; - INODE_LIST_UNLOCK (); - } - else - node->UNLOCK (); - if (error) - { - set_errno (error); - return -1; - } - return 0; -} - -/* - * Set a byte-range lock. - */ -static int -lf_setlock (lockf_t *lock, inode_t *node, lockf_t **clean, HANDLE fhdl) -{ - lockf_t *block; - lockf_t **head = lock->lf_head; - lockf_t **prev, *overlap; - int ovcase, priority, old_prio, needtolink; - tmp_pathbuf tp; - - /* - * Set the priority - */ - priority = old_prio = GetThreadPriority (GetCurrentThread ()); - if (lock->lf_type == F_WRLCK && priority <= THREAD_PRIORITY_ABOVE_NORMAL) - priority = THREAD_PRIORITY_HIGHEST; - /* - * Scan lock list for this file looking for locks that would block us. - */ - /* Create temporary space for the all locks list. */ - node->i_all_lf = (lockf_t *) tp.w_get (); - while ((block = lf_getblock(lock, node))) - { - DWORD ret; - HANDLE obj = block->lf_obj; - block->lf_obj = NULL; - - /* - * Free the structure and return if nonblocking. - */ - if ((lock->lf_flags & F_WAIT) == 0) - { - lock->lf_next = *clean; - *clean = lock; - if (obj) - NtClose (obj); - return EAGAIN; - } - /* - * We are blocked. Since flock style locks cover - * the whole file, there is no chance for deadlock. - * For byte-range locks we must check for deadlock. - * - * Deadlock detection is done by looking through the - * wait channels to see if there are any cycles that - * involve us. MAXDEPTH is set just to make sure we - * do not go off into neverland. - */ - /* FIXME: We check the handle count of all the lock event objects - this process holds. If it's > 1, another process is - waiting for one of our locks. This method isn't overly - intelligent. If it turns out to be too dumb, we might - have to remove it or to find another method. */ - for (lockf_t *lk = node->i_lockf; lk; lk = lk->lf_next) - if ((lk->lf_flags & F_POSIX) && get_obj_handle_count (lk->lf_obj) > 1) - { - if (obj) - NtClose (obj); - return EDEADLK; - } - - /* - * For flock type locks, we must first remove - * any shared locks that we hold before we sleep - * waiting for an exclusive lock. - */ - if ((lock->lf_flags & F_FLOCK) && lock->lf_type == F_WRLCK) - { - lock->lf_type = F_UNLCK; - (void) lf_clearlock (lock, clean, fhdl); - lock->lf_type = F_WRLCK; - } - - /* - * Add our lock to the blocked list and sleep until we're free. - * Remember who blocked us (for deadlock detection). - */ - /* Cygwin: No locked list. See deadlock recognition above. */ - - /* Wait for the blocking object and its holding process. */ - if (!obj) - { - /* We can't synchronize on the lock event object. - Treat this as a deadlock-like situation for now. */ - system_printf ("Can't sync with lock object hold by " - "Win32 pid %lu: %E", block->lf_wid); - return EDEADLK; - } - SetThreadPriority (GetCurrentThread (), priority); - if (lock->lf_flags & F_POSIX) - { - HANDLE proc = OpenProcess (SYNCHRONIZE, FALSE, block->lf_wid); - if (!proc) - { - /* If we can't synchronize on the process holding the lock, - we will never recognize when the lock has been abandoned. - Treat this as a deadlock-like situation for now. */ - system_printf ("Can't sync with process holding a lock " - "(Win32 pid %lu): %E", block->lf_wid); - NtClose (obj); - return EDEADLK; - } - HANDLE w4[3] = { obj, proc, signal_arrived }; - node->UNLOCK (); - ret = WaitForMultipleObjects (3, w4, FALSE, INFINITE); - CloseHandle (proc); - } - else - { - HANDLE w4[2] = { obj, signal_arrived }; - node->UNLOCK (); - /* Unfortunately, since BSD flock locks are not attached to a - specific process, we can't recognize an abandoned lock by - sync'ing with a process. We have to find out if we're the only - process left accessing this event object. */ - do - { - ret = WaitForMultipleObjects (2, w4, FALSE, 100L); - } - while (ret == WAIT_TIMEOUT && get_obj_handle_count (obj) > 1); - } - node->LOCK (); - NtClose (obj); - SetThreadPriority (GetCurrentThread (), old_prio); - switch (ret) - { - case WAIT_OBJECT_0: - /* The lock object has been set to signalled. */ - break; - case WAIT_OBJECT_0 + 1: - /* For POSIX locks, the process holding the lock has exited. */ - if (lock->lf_flags & F_POSIX) - break; - /*FALLTHRU*/ - case WAIT_OBJECT_0 + 2: - /* A signal came in. */ - _my_tls.call_signal_handler (); - return EINTR; - default: - return geterrno_from_win_error (); - } - } - allow_others_to_sync (); - /* - * No blocks!! Add the lock. Note that we will - * downgrade or upgrade any overlapping locks this - * process already owns. - * - * Handle any locks that overlap. - */ - prev = head; - block = *head; - needtolink = 1; - for (;;) - { - ovcase = lf_findoverlap (block, lock, SELF, &prev, &overlap); - if (ovcase) - block = overlap->lf_next; - /* - * Six cases: - * 0) no overlap - * 1) overlap == lock - * 2) overlap contains lock - * 3) lock contains overlap - * 4) overlap starts before lock - * 5) overlap ends after lock - */ - switch (ovcase) - { - case 0: /* no overlap */ - if (needtolink) - { - *prev = lock; - lock->lf_next = overlap; - lock->create_lock_obj (); - } - break; - - case 1: /* overlap == lock */ - /* - * If downgrading lock, others may be - * able to acquire it. - * Cygwin: Always wake lock. - */ - lf_wakelock (overlap, fhdl); - overlap->lf_type = lock->lf_type; - overlap->create_lock_obj (); - lock->lf_next = *clean; - *clean = lock; - break; - - case 2: /* overlap contains lock */ - /* - * Check for common starting point and different types. - */ - if (overlap->lf_type == lock->lf_type) - { - lock->lf_next = *clean; - *clean = lock; - break; - } - if (overlap->lf_start == lock->lf_start) - { - *prev = lock; - lock->lf_next = overlap; - overlap->lf_start = lock->lf_end + 1; - } - else - lf_split (overlap, lock, clean); - lf_wakelock (overlap, fhdl); - overlap->create_lock_obj (); - lock->create_lock_obj (); - if (lock->lf_next && !lock->lf_next->lf_obj) - lock->lf_next->create_lock_obj (); - break; - - case 3: /* lock contains overlap */ - /* - * If downgrading lock, others may be able to - * acquire it, otherwise take the list. - * Cygwin: Always wake old lock and create new lock. - */ - lf_wakelock (overlap, fhdl); - /* - * Add the new lock if necessary and delete the overlap. - */ - if (needtolink) - { - *prev = lock; - lock->lf_next = overlap->lf_next; - prev = &lock->lf_next; - lock->create_lock_obj (); - needtolink = 0; - } - else - *prev = overlap->lf_next; - overlap->lf_next = *clean; - *clean = overlap; - continue; - - case 4: /* overlap starts before lock */ - /* - * Add lock after overlap on the list. - */ - lock->lf_next = overlap->lf_next; - overlap->lf_next = lock; - overlap->lf_end = lock->lf_start - 1; - prev = &lock->lf_next; - lf_wakelock (overlap, fhdl); - overlap->create_lock_obj (); - lock->create_lock_obj (); - needtolink = 0; - continue; - - case 5: /* overlap ends after lock */ - /* - * Add the new lock before overlap. - */ - if (needtolink) { - *prev = lock; - lock->lf_next = overlap; - } - overlap->lf_start = lock->lf_end + 1; - lf_wakelock (overlap, fhdl); - lock->create_lock_obj (); - overlap->create_lock_obj (); - break; - } - break; - } - return 0; -} - -/* - * Remove a byte-range lock on an inode_t. - * - * Generally, find the lock (or an overlap to that lock) - * and remove it (or shrink it), then wakeup anyone we can. - */ -static int -lf_clearlock (lockf_t *unlock, lockf_t **clean, HANDLE fhdl) -{ - lockf_t **head = unlock->lf_head; - lockf_t *lf = *head; - lockf_t *overlap, **prev; - int ovcase; - - if (lf == NOLOCKF) - return 0; - prev = head; - while ((ovcase = lf_findoverlap (lf, unlock, SELF, &prev, &overlap))) - { - /* - * Wakeup the list of locks to be retried. - */ - lf_wakelock (overlap, fhdl); - - switch (ovcase) - { - case 1: /* overlap == lock */ - *prev = overlap->lf_next; - overlap->lf_next = *clean; - *clean = overlap; - break; - - case 2: /* overlap contains lock: split it */ - if (overlap->lf_start == unlock->lf_start) - { - overlap->lf_start = unlock->lf_end + 1; - overlap->create_lock_obj (); - break; - } - lf_split (overlap, unlock, clean); - overlap->lf_next = unlock->lf_next; - overlap->create_lock_obj (); - if (overlap->lf_next && !overlap->lf_next->lf_obj) - overlap->lf_next->create_lock_obj (); - break; - - case 3: /* lock contains overlap */ - *prev = overlap->lf_next; - lf = overlap->lf_next; - overlap->lf_next = *clean; - *clean = overlap; - continue; - - case 4: /* overlap starts before lock */ - overlap->lf_end = unlock->lf_start - 1; - prev = &overlap->lf_next; - lf = overlap->lf_next; - overlap->create_lock_obj (); - continue; - - case 5: /* overlap ends after lock */ - overlap->lf_start = unlock->lf_end + 1; - overlap->create_lock_obj (); - break; - } - break; - } - return 0; -} - -/* - * Check whether there is a blocking lock, - * and if so return its process identifier. - */ -static int -lf_getlock (lockf_t *lock, inode_t *node, struct __flock64 *fl) -{ - lockf_t *block; - tmp_pathbuf tp; - - /* Create temporary space for the all locks list. */ - node->i_all_lf = (lockf_t *) tp.w_get (); - if ((block = lf_getblock (lock, node))) - { - if (block->lf_obj) - NtClose (block->lf_obj); - fl->l_type = block->lf_type; - fl->l_whence = SEEK_SET; - fl->l_start = block->lf_start; - if (block->lf_end == -1) - fl->l_len = 0; - else - fl->l_len = block->lf_end - block->lf_start + 1; - if (block->lf_flags & F_POSIX) - fl->l_pid = (pid_t) block->lf_id; - else - fl->l_pid = -1; - } - else - fl->l_type = F_UNLCK; - return 0; -} - -/* - * Walk the list of locks for an inode_t and - * return the first blocking lock. - */ -static lockf_t * -lf_getblock (lockf_t *lock, inode_t *node) -{ - lockf_t **prev, *overlap; - lockf_t *lf = node->get_all_locks_list (); - int ovcase; - NTSTATUS status; - EVENT_BASIC_INFORMATION ebi; - - prev = lock->lf_head; - while ((ovcase = lf_findoverlap (lf, lock, OTHERS, &prev, &overlap))) - { - /* - * We've found an overlap, see if it blocks us - */ - if ((lock->lf_type == F_WRLCK || overlap->lf_type == F_WRLCK)) - { - /* Open the event object for synchronization. */ - if (!overlap->open_lock_obj () || (overlap->lf_flags & F_POSIX)) - return overlap; - /* In case of BSD flock locks, check if the event object is - signalled. If so, the overlap doesn't actually exist anymore. - There are just a few open handles left. */ - status = NtQueryEvent (overlap->lf_obj, EventBasicInformation, - &ebi, sizeof ebi, NULL); - if (!NT_SUCCESS (status) || ebi.SignalState == 0) - return overlap; - NtClose (overlap->lf_obj); - overlap->lf_obj = NULL; - } - /* - * Nope, point to the next one on the list and - * see if it blocks us - */ - lf = overlap->lf_next; - } - return NOLOCKF; -} - -/* - * Walk the list of locks for an inode_t to - * find an overlapping lock (if any). - * - * NOTE: this returns only the FIRST overlapping lock. There - * may be more than one. - */ -static int -lf_findoverlap (lockf_t *lf, lockf_t *lock, int type, lockf_t ***prev, - lockf_t **overlap) -{ - _off64_t start, end; - - *overlap = lf; - if (lf == NOLOCKF) - return 0; - - start = lock->lf_start; - end = lock->lf_end; - while (lf != NOLOCKF) - { - if (((type & OTHERS) && lf->lf_id == lock->lf_id) - /* As on Linux: POSIX locks and BSD flock locks don't interact. */ - || (lf->lf_flags & (F_POSIX | F_FLOCK)) - != (lock->lf_flags & (F_POSIX | F_FLOCK))) - { - *prev = &lf->lf_next; - *overlap = lf = lf->lf_next; - continue; - } - /* - * OK, check for overlap - * - * Six cases: - * 0) no overlap - * 1) overlap == lock - * 2) overlap contains lock - * 3) lock contains overlap - * 4) overlap starts before lock - * 5) overlap ends after lock - */ - if ((lf->lf_end != -1 && start > lf->lf_end) || - (end != -1 && lf->lf_start > end)) - { - /* Case 0 */ - if ((type & SELF) && end != -1 && lf->lf_start > end) - return 0; - *prev = &lf->lf_next; - *overlap = lf = lf->lf_next; - continue; - } - if ((lf->lf_start == start) && (lf->lf_end == end)) - { - /* Case 1 */ - return 1; - } - if ((lf->lf_start <= start) && (end != -1) && - ((lf->lf_end >= end) || (lf->lf_end == -1))) - { - /* Case 2 */ - return 2; - } - if (start <= lf->lf_start && (end == -1 || - (lf->lf_end != -1 && end >= lf->lf_end))) - { - /* Case 3 */ - return 3; - } - if ((lf->lf_start < start) && - ((lf->lf_end >= start) || (lf->lf_end == -1))) - { - /* Case 4 */ - return 4; - } - if ((lf->lf_start > start) && (end != -1) && - ((lf->lf_end > end) || (lf->lf_end == -1))) - { - /* Case 5 */ - return 5; - } - api_fatal ("lf_findoverlap: default\n"); - } - return 0; -} - -/* - * Split a lock and a contained region into - * two or three locks as necessary. - */ -static void -lf_split (lockf_t *lock1, lockf_t *lock2, lockf_t **split) -{ - lockf_t *splitlock; - - /* - * Check to see if spliting into only two pieces. - */ - if (lock1->lf_start == lock2->lf_start) - { - lock1->lf_start = lock2->lf_end + 1; - lock2->lf_next = lock1; - return; - } - if (lock1->lf_end == lock2->lf_end) - { - lock1->lf_end = lock2->lf_start - 1; - lock2->lf_next = lock1->lf_next; - lock1->lf_next = lock2; - return; - } - /* - * Make a new lock consisting of the last part of - * the encompassing lock. We use the preallocated - * splitlock so we don't have to block. - */ - splitlock = *split; - assert (splitlock != NULL); - *split = splitlock->lf_next; - memcpy (splitlock, lock1, sizeof *splitlock); - /* We have to unset the obj HANDLE here which has been copied by the - above memcpy, so that the calling function recognizes the new object. - See post-lf_split handling in lf_setlock and lf_clearlock. */ - splitlock->lf_obj = NULL; - splitlock->lf_start = lock2->lf_end + 1; - lock1->lf_end = lock2->lf_start - 1; - /* - * OK, now link it in - */ - splitlock->lf_next = lock1->lf_next; - lock2->lf_next = splitlock; - lock1->lf_next = lock2; -} - -/* - * Wakeup a blocklist - * Cygwin: Just signal the lock which gets removed. This unblocks - * all threads waiting for this lock. - */ -static void -lf_wakelock (lockf_t *listhead, HANDLE fhdl) -{ - listhead->del_lock_obj (fhdl, true); -} - -extern "C" int -flock (int fd, int operation) -{ - int res = -1; - int cmd; - struct __flock64 fl = { 0, SEEK_SET, 0, 0, 0 }; - - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - - cygheap_fdget cfd (fd, true); - if (cfd < 0) - goto done; - - cmd = (operation & LOCK_NB) ? F_SETLK : F_SETLKW; - switch (operation & (~LOCK_NB)) - { - case LOCK_EX: - fl.l_type = F_WRLCK | F_FLOCK; - break; - case LOCK_SH: - fl.l_type = F_RDLCK | F_FLOCK; - break; - case LOCK_UN: - fl.l_type = F_UNLCK | F_FLOCK; - break; - default: - set_errno (EINVAL); - goto done; - } - res = cfd->lock (cmd, &fl); - if ((res == -1) && ((get_errno () == EAGAIN) || (get_errno () == EACCES))) - set_errno (EWOULDBLOCK); -done: - syscall_printf ("%d = flock (%d, %d)", res, fd, operation); - return res; -} - -extern "C" int -lockf (int filedes, int function, _off64_t size) -{ - int res = -1; - int cmd; - struct __flock64 fl; - - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - - cygheap_fdget cfd (filedes, true); - if (cfd < 0) - goto done; - - fl.l_start = 0; - fl.l_len = size; - fl.l_whence = SEEK_CUR; - - switch (function) - { - case F_ULOCK: - cmd = F_SETLK; - fl.l_type = F_UNLCK; - break; - case F_LOCK: - cmd = F_SETLKW; - fl.l_type = F_WRLCK; - break; - case F_TLOCK: - cmd = F_SETLK; - fl.l_type = F_WRLCK; - break; - case F_TEST: - fl.l_type = F_WRLCK; - if (cfd->lock (F_GETLK, &fl) == -1) - goto done; - if (fl.l_type == F_UNLCK || fl.l_pid == getpid ()) - res = 0; - else - errno = EAGAIN; - goto done; - /* NOTREACHED */ - default: - errno = EINVAL; - goto done; - /* NOTREACHED */ - } - res = cfd->lock (cmd, &fl); -done: - syscall_printf ("%d = lockf (%d, %d, %D)", res, filedes, function, size); - return res; -} |