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/* shared_info.h: shared info for cygwin
Copyright 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 "tty.h"
/* Mount table entry */
class mount_item
{
public:
/* FIXME: Nasty static allocation. Need to have a heap in the shared
area [with the user being able to configure at runtime the max size]. */
/* Win32-style mounted partition source ("C:\foo\bar").
native_path[0] == 0 for unused entries. */
char native_path[MAX_PATH];
int native_pathlen;
/* POSIX-style mount point ("/foo/bar") */
char posix_path[MAX_PATH];
int posix_pathlen;
unsigned flags;
void init (const char *dev, const char *path, unsigned flags);
struct mntent *getmntent ();
};
/* Warning: Decreasing this value will cause cygwin.dll to ignore existing
higher numbered registry entries. Don't change this number willy-nilly.
What we need is to have a more dynamic allocation scheme, but the current
scheme should be satisfactory for a long while yet. */
#define MAX_MOUNTS 30
#define MOUNT_VERSION 27 // increment when mount table changes and
#define MOUNT_VERSION_MAGIC CYGWIN_VERSION_MAGIC (MOUNT_MAGIC, MOUNT_VERSION)
#define CURR_MOUNT_MAGIC 0x4fe431cdU
#define MOUNT_INFO_CB 16488
class reg_key;
/* NOTE: Do not make gratuitous changes to the names or organization of the
below class. The layout is checksummed to determine compatibility between
different cygwin versions. */
class mount_info
{
public:
DWORD version;
unsigned cb;
DWORD sys_mount_table_counter;
int nmounts;
mount_item mount[MAX_MOUNTS];
/* cygdrive_prefix is used as the root of the path automatically
prepended to a path when the path has no associated mount.
cygdrive_flags are the default flags for the cygdrives. */
char cygdrive[MAX_PATH];
size_t cygdrive_len;
unsigned cygdrive_flags;
private:
int posix_sorted[MAX_MOUNTS];
int native_sorted[MAX_MOUNTS];
public:
/* Increment when setting up a reg_key if mounts area had to be
created so we know when we need to import old mount tables. */
int had_to_create_mount_areas;
void init ();
int add_item (const char *dev, const char *path, unsigned flags, int reg_p);
int del_item (const char *path, unsigned flags, int reg_p);
void from_registry ();
int add_reg_mount (const char * native_path, const char * posix_path,
unsigned mountflags);
int del_reg_mount (const char * posix_path, unsigned mountflags);
unsigned set_flags_from_win32_path (const char *path);
int conv_to_win32_path (const char *src_path, char *dst, DWORD &devn,
int &unit, unsigned *flags = NULL, bool no_normalize = 0);
int conv_to_posix_path (const char *src_path, char *posix_path,
int keep_rel_p);
struct mntent *getmntent (int x);
int write_cygdrive_info_to_registry (const char *cygdrive_prefix, unsigned flags);
int remove_cygdrive_info_from_registry (const char *cygdrive_prefix, unsigned flags);
int get_cygdrive_info (char *user, char *system, char* user_flags,
char* system_flags);
private:
void sort ();
void read_mounts (reg_key& r);
void mount_slash ();
void to_registry ();
int cygdrive_win32_path (const char *src, char *dst, int& unit);
void cygdrive_posix_path (const char *src, char *dst, int trailing_slash_p);
void read_cygdrive_info_from_registry ();
};
/******** Close-on-delete queue ********/
/* First pass at a file deletion queue structure.
We can't keep this list in the per-process info, since
one process may open a file, and outlive a process which
wanted to unlink the file - and the data would go away.
*/
#define MAX_DELQUEUES_PENDING 100
class delqueue_list
{
char name[MAX_DELQUEUES_PENDING][MAX_PATH];
char inuse[MAX_DELQUEUES_PENDING];
int empty;
public:
void init ();
void queue_file (const char *dosname);
void process_queue ();
};
/******** Shared Info ********/
/* Data accessible to all tasks */
#define SHARED_VERSION (unsigned)(cygwin_version.api_major << 8 | \
cygwin_version.api_minor)
#define SHARED_VERSION_MAGIC CYGWIN_VERSION_MAGIC (SHARED_MAGIC, SHARED_VERSION)
#define SHARED_INFO_CB 47112
#define CURR_SHARED_MAGIC 0x359218a2U
/* NOTE: Do not make gratuitous changes to the names or organization of the
below class. The layout is checksummed to determine compatibility between
different cygwin versions. */
class shared_info
{
DWORD version;
DWORD cb;
public:
unsigned heap_chunk;
DWORD sys_mount_table_counter;
tty_list tty;
delqueue_list delqueue;
void initialize ();
unsigned heap_chunk_size ();
};
extern shared_info *cygwin_shared;
extern mount_info *mount_table;
extern HANDLE cygwin_mount_h;
enum shared_locations
{
SH_CYGWIN_SHARED,
SH_MOUNT_TABLE,
SH_SHARED_CONSOLE,
SH_MYSELF,
SH_TOTAL_SIZE
};
void __stdcall memory_init ();
#define shared_align_past(p) \
((char *) (system_info.dwAllocationGranularity * \
(((DWORD) ((p) + 1) + system_info.dwAllocationGranularity - 1) / \
system_info.dwAllocationGranularity)))
#define cygwin_shared_address ((void *) 0xa000000)
#ifdef FHDEVN
struct console_state
{
tty_min tty_min_state;
dev_console dev_state;
};
#endif
char *__stdcall shared_name (const char *, int);
void *__stdcall open_shared (const char *name, int n, HANDLE &shared_h, DWORD size, shared_locations);
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