aboutsummaryrefslogtreecommitdiff
path: root/winsup/cygwin/shared.cc
diff options
context:
space:
mode:
Diffstat (limited to 'winsup/cygwin/shared.cc')
-rw-r--r--winsup/cygwin/shared.cc314
1 files changed, 0 insertions, 314 deletions
diff --git a/winsup/cygwin/shared.cc b/winsup/cygwin/shared.cc
deleted file mode 100644
index ab748e5..0000000
--- a/winsup/cygwin/shared.cc
+++ /dev/null
@@ -1,314 +0,0 @@
-/* shared.cc: shared data area support.
-
- Copyright 1996, 1997, 1998, 1999, 2000, 2001 Red Hat, Inc.
-
-This file is part of Cygwin.
-
-This software is a copyrighted work licensed under the terms of the
-Cygwin license. Please consult the file "CYGWIN_LICENSE" for
-details. */
-
-#include "winsup.h"
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <grp.h>
-#include <pwd.h>
-#include <errno.h>
-#include "sync.h"
-#include "sigproc.h"
-#include "pinfo.h"
-#include "security.h"
-#include "fhandler.h"
-#include "path.h"
-#include "dtable.h"
-#include "cygerrno.h"
-#include "cygheap.h"
-#include "heap.h"
-#include "shared_info.h"
-#include "registry.h"
-#include "cygwin_version.h"
-
-#define SHAREDVER (unsigned)(cygwin_version.api_major << 16 | \
- cygwin_version.api_minor)
-
-shared_info NO_COPY *cygwin_shared = NULL;
-mount_info NO_COPY *mount_table = NULL;
-HANDLE cygwin_mount_h;
-
-/* General purpose security attribute objects for global use. */
-SECURITY_ATTRIBUTES NO_COPY sec_none;
-SECURITY_ATTRIBUTES NO_COPY sec_none_nih;
-SECURITY_ATTRIBUTES NO_COPY sec_all;
-SECURITY_ATTRIBUTES NO_COPY sec_all_nih;
-
-char * __stdcall
-shared_name (const char *str, int num)
-{
- static NO_COPY char buf[MAX_PATH] = {0};
- extern bool _cygwin_testing;
-
- __small_sprintf (buf, "%s.%s.%d", cygwin_version.shared_id, str, num);
- if (!_cygwin_testing)
- strcat (buf, cygwin_version.dll_build_date);
- return buf;
-}
-
-void * __stdcall
-open_shared (const char *name, int n, HANDLE &shared_h, DWORD size, void *addr)
-{
- void *shared;
-
- if (!shared_h)
- {
- char *mapname;
- if (!name)
- mapname = NULL;
- else
- {
- mapname = shared_name (name, n);
- shared_h = OpenFileMappingA (FILE_MAP_READ | FILE_MAP_WRITE,
- TRUE, mapname);
- }
- if (!shared_h &&
- !(shared_h = CreateFileMappingA (INVALID_HANDLE_VALUE,
- &sec_all,
- PAGE_READWRITE,
- 0,
- size,
- mapname)))
- api_fatal ("CreateFileMappingA, %E. Terminating.");
- }
-
- shared = (shared_info *) MapViewOfFileEx (shared_h,
- FILE_MAP_READ | FILE_MAP_WRITE,
- 0, 0, 0, addr);
-
- if (!shared)
- {
- /* Probably win95, so try without specifying the address. */
- shared = (shared_info *) MapViewOfFileEx (shared_h,
- FILE_MAP_READ|FILE_MAP_WRITE,
- 0, 0, 0, 0);
- }
-
- if (!shared)
- api_fatal ("MapViewOfFileEx '%s'(%p), %E. Terminating.", name, shared_h);
-
- debug_printf ("name %s, shared %p (wanted %p), h %p", name, shared, addr, shared_h);
-
- /* FIXME: I couldn't find anywhere in the documentation a note about
- whether the memory is initialized to zero. The code assumes it does
- and since this part seems to be working, we'll leave it as is. */
- return shared;
-}
-
-void
-shared_info::initialize ()
-{
- if (inited)
- {
- if (inited != SHAREDVER)
- multiple_cygwin_die ();
- return;
- }
-
- /* Initialize the queue of deleted files. */
- delqueue.init ();
-
- /* Initialize tty table. */
- tty.init ();
- inited = SHAREDVER;
-}
-
-void __stdcall
-memory_init ()
-{
- /* Initialize general shared memory */
- HANDLE shared_h = cygheap ? cygheap->shared_h : NULL;
- cygwin_shared = (shared_info *) open_shared ("shared",
- CYGWIN_VERSION_SHARED_DATA,
- shared_h,
- sizeof (*cygwin_shared),
- cygwin_shared_address);
-
- cygwin_shared->initialize ();
-
- /* Allocate memory for the per-user mount table */
- char user_name[UNLEN + 1];
- DWORD user_name_len = UNLEN + 1;
-
- if (!GetUserName (user_name, &user_name_len))
- strcpy (user_name, "unknown");
-
- /* Initialize the Cygwin heap, if necessary */
- if (!cygheap)
- {
- cygheap_init ();
- cygheap->user.set_name (user_name);
- }
-
- cygheap->shared_h = shared_h;
- ProtectHandle (cygheap->shared_h);
-
- heap_init ();
- mount_table = (mount_info *) open_shared (user_name, MOUNT_VERSION,
- cygwin_mount_h,
- sizeof (mount_info), 0);
- debug_printf ("opening mount table for '%s' at %p", cygheap->user.name (),
- mount_table_address);
- ProtectHandle (cygwin_mount_h);
- debug_printf ("mount table version %x at %p", mount_table->version, mount_table);
-
- /* Initialize the Cygwin per-user mount table, if necessary */
- if (!mount_table->version)
- {
- mount_table->version = MOUNT_VERSION;
- debug_printf ("initializing mount table");
- mount_table->init (); /* Initialize the mount table. */
- }
- else if (mount_table->version != MOUNT_VERSION)
- multiple_cygwin_die ();
-
-}
-
-void __stdcall
-shared_terminate ()
-{
- if (cygheap->shared_h)
- ForceCloseHandle (cygheap->shared_h);
- if (cygwin_mount_h)
- ForceCloseHandle (cygwin_mount_h);
-}
-
-unsigned
-shared_info::heap_chunk_size ()
-{
- if (!heap_chunk_in_mb)
- {
- /* Fetch misc. registry entries. */
-
- reg_key reg (KEY_READ, NULL);
-
- /* Note that reserving a huge amount of heap space does not result in
- the use of swap since we are not committing it. */
- /* FIXME: We should not be restricted to a fixed size heap no matter
- what the fixed size is. */
-
- heap_chunk_in_mb = reg.get_int ("heap_chunk_in_mb", 256);
- if (heap_chunk_in_mb < 4)
- {
- heap_chunk_in_mb = 4;
- reg.set_int ("heap_chunk_in_mb", heap_chunk_in_mb);
- }
- }
-
- return heap_chunk_in_mb << 20;
-}
-
-/*
- * Function to return a common SECURITY_DESCRIPTOR * that
- * allows all access.
- */
-
-static NO_COPY SECURITY_DESCRIPTOR *null_sdp = 0;
-
-SECURITY_DESCRIPTOR *__stdcall
-get_null_sd ()
-{
- static NO_COPY SECURITY_DESCRIPTOR sd;
-
- if (null_sdp == 0)
- {
- InitializeSecurityDescriptor (&sd, SECURITY_DESCRIPTOR_REVISION);
- SetSecurityDescriptorDacl (&sd, TRUE, 0, FALSE);
- null_sdp = &sd;
- }
- return null_sdp;
-}
-
-PSECURITY_ATTRIBUTES __stdcall
-sec_user (PVOID sa_buf, PSID sid2, BOOL inherit)
-{
- if (! sa_buf)
- return inherit ? &sec_none_nih : &sec_none;
-
- PSECURITY_ATTRIBUTES psa = (PSECURITY_ATTRIBUTES) sa_buf;
- PSECURITY_DESCRIPTOR psd = (PSECURITY_DESCRIPTOR)
- ((char *) sa_buf + sizeof (*psa));
- PACL acl = (PACL) ((char *) sa_buf + sizeof (*psa) + sizeof (*psd));
-
- cygsid sid;
-
- if (cygheap->user.sid ())
- sid = cygheap->user.sid ();
- else if (! lookup_name (getlogin (), cygheap->user.logsrv (), sid))
- return inherit ? &sec_none_nih : &sec_none;
-
- size_t acl_len = sizeof (ACL)
- + 4 * (sizeof (ACCESS_ALLOWED_ACE) - sizeof (DWORD))
- + GetLengthSid (sid)
- + GetLengthSid (well_known_admins_sid)
- + GetLengthSid (well_known_system_sid)
- + GetLengthSid (well_known_creator_owner_sid);
- if (sid2)
- acl_len += sizeof (ACCESS_ALLOWED_ACE) - sizeof (DWORD)
- + GetLengthSid (sid2);
-
- if (! InitializeAcl (acl, acl_len, ACL_REVISION))
- debug_printf ("InitializeAcl %E");
-
- if (! AddAccessAllowedAce (acl, ACL_REVISION,
- SPECIFIC_RIGHTS_ALL | STANDARD_RIGHTS_ALL,
- sid))
- debug_printf ("AddAccessAllowedAce(%s) %E", getlogin ());
-
- if (! AddAccessAllowedAce (acl, ACL_REVISION,
- SPECIFIC_RIGHTS_ALL | STANDARD_RIGHTS_ALL,
- well_known_admins_sid))
- debug_printf ("AddAccessAllowedAce(admin) %E");
-
- if (! AddAccessAllowedAce (acl, ACL_REVISION,
- SPECIFIC_RIGHTS_ALL | STANDARD_RIGHTS_ALL,
- well_known_system_sid))
- debug_printf ("AddAccessAllowedAce(system) %E");
-
- if (! AddAccessAllowedAce (acl, ACL_REVISION,
- SPECIFIC_RIGHTS_ALL | STANDARD_RIGHTS_ALL,
- well_known_creator_owner_sid))
- debug_printf ("AddAccessAllowedAce(creator_owner) %E");
-
- if (sid2)
- if (! AddAccessAllowedAce (acl, ACL_REVISION,
- SPECIFIC_RIGHTS_ALL | STANDARD_RIGHTS_ALL,
- sid2))
- debug_printf ("AddAccessAllowedAce(sid2) %E");
-
- if (! InitializeSecurityDescriptor (psd,
- SECURITY_DESCRIPTOR_REVISION))
- debug_printf ("InitializeSecurityDescriptor %E");
-
-/*
- * Setting the owner lets the created security attribute not work
- * on NT4 SP3 Server. Don't know why, but the function still does
- * what it should do also if the owner isn't set.
-*/
-#if 0
- if (! SetSecurityDescriptorOwner (psd, sid, FALSE))
- debug_printf ("SetSecurityDescriptorOwner %E");
-#endif
-
- if (! SetSecurityDescriptorDacl (psd, TRUE, acl, FALSE))
- debug_printf ("SetSecurityDescriptorDacl %E");
-
- psa->nLength = sizeof (SECURITY_ATTRIBUTES);
- psa->lpSecurityDescriptor = psd;
- psa->bInheritHandle = inherit;
- return psa;
-}
-
-SECURITY_ATTRIBUTES *__stdcall
-sec_user_nih (PVOID sa_buf, PSID sid2)
-{
- return sec_user (sa_buf, sid2, FALSE);
-}
generated by cgit v1.1 at 2025-03-29 10:42:42 +0000