143 lines
3.5 KiB
C++
143 lines
3.5 KiB
C++
/* cygheap.h: Cygwin heap manager.
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Copyright 2000 Cygnus Solutions.
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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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#undef cfree
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enum cygheap_types
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{
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HEAP_FHANDLER,
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HEAP_STR,
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HEAP_ARGV,
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HEAP_BUF,
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HEAP_1_START,
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HEAP_1_STR,
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HEAP_1_ARGV,
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HEAP_1_BUF,
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HEAP_1_EXEC,
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HEAP_1_MAX = 100
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};
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#define incygheap(s) (cygheap && ((char *) (s) >= (char *) cygheap) && ((char *) (s) <= ((char *) cygheap_max)))
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struct _cmalloc_entry
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{
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union
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{
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DWORD b;
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char *ptr;
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};
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struct _cmalloc_entry *prev;
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char data[0];
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};
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class cygheap_root
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{
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/* Root directory information.
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This is used after a chroot is called. */
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size_t rootlen;
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char *root;
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public:
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cygheap_root (cygheap_root &nroot);
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~cygheap_root ();
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char *operator =(const char *new_root);
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size_t length () const { return rootlen; }
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const char *path () const { return root; }
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};
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class cygheap_user
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{
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/* Extendend user information.
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The information is derived from the internal_getlogin call
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when on a NT system. */
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char *pname; /* user's name */
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char *plogsrv; /* Logon server, may be FQDN */
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char *pdomain; /* Logon domain of the user */
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PSID psid; /* buffer for user's SID */
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public:
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uid_t orig_uid; /* Remains intact even after impersonation */
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uid_t orig_gid; /* Ditto */
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uid_t real_uid; /* Remains intact on seteuid, replaced by setuid */
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gid_t real_gid; /* Ditto */
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/* token is needed if set(e)uid should be called. It can be set by a call
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to `set_impersonation_token()'. */
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HANDLE token;
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BOOL impersonated;
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cygheap_user () : pname (NULL), plogsrv (NULL), pdomain (NULL), psid (NULL) {}
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~cygheap_user ();
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void set_name (const char *new_name);
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const char *name () const { return pname; }
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void set_logsrv (const char *new_logsrv);
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const char *logsrv () const { return plogsrv; }
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void set_domain (const char *new_domain);
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const char *domain () const { return pdomain; }
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BOOL set_sid (PSID new_sid);
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PSID sid () const { return psid; }
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void operator =(cygheap_user &user)
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{
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set_name (user.name ());
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set_logsrv (user.logsrv ());
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set_domain (user.domain ());
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set_sid (user.sid ());
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}
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};
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/* cwd cache stuff. */
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class muto;
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struct cwdstuff
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{
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char *posix;
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char *win32;
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DWORD hash;
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muto *lock;
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char *get (char *buf, int need_posix = 1, int with_chroot = 0, unsigned ulen = MAX_PATH);
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DWORD get_hash ();
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void init ();
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void fixup_after_exec (char *win32, char *posix, DWORD hash);
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bool get_initial ();
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void set (const char *win32_cwd, const char *posix_cwd = NULL);
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};
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struct init_cygheap
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{
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_cmalloc_entry *chain;
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cygheap_root root;
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cygheap_user user;
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mode_t umask;
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HANDLE shared_h;
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HANDLE console_h;
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cwdstuff cwd;
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dtable fdtab;
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};
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#define CYGHEAPSIZE (sizeof (init_cygheap) + (4000 * sizeof (fhandler_union)) + (2 * 65536))
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extern init_cygheap *cygheap;
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extern void *cygheap_max;
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extern "C" {
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void __stdcall cfree (void *) __attribute__ ((regparm(1)));
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void __stdcall cygheap_fixup_in_child (HANDLE, bool);
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void *__stdcall cmalloc (cygheap_types, DWORD) __attribute__ ((regparm(2)));
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void *__stdcall crealloc (void *, DWORD) __attribute__ ((regparm(2)));
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void *__stdcall ccalloc (cygheap_types, DWORD, DWORD) __attribute__ ((regparm(3)));
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char *__stdcall cstrdup (const char *) __attribute__ ((regparm(1)));
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char *__stdcall cstrdup1 (const char *) __attribute__ ((regparm(1)));
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void __stdcall cygheap_init ();
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}
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