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* cygheap.cc (init_cygheap::etc_changed): New method to signal

Browse Source 
a change in /etc.
	* cygheap.h (struct init_cygheap): Add member `etc_changed_h'
	and method `etc_changed'.
	* grp.cc (enum grp_state): Eliminate.
	(class grp_check): Ditto.
	(group_state): Define as `class pwdgrp_check'.
	(parse_grp): Remeber path and modification time of /etc/group file.
	* passwd.cc (enum_pwd_state): Eliminate.
	(class pwd_check): Ditto.
	(passwd_state): Define as `class pwdgrp_check'.
	(read_etc_passwd): Remember path and modification time of /etc/passwd
	file.
	* pwdgrp.h: New file.
	(enum pwdgrp_state): Substitutes `pwd_state' and `grp_state'.
	(class pwdgrp_check): Substitutes `pwd_check' and `grp_check'.
This commit is contained in:
Corinna Vinschen
2001-09-09 16:52:37 +00:00
parent d961def403
commit 49eef6d5f7
7 changed files with 124 additions and 103 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
winsup/cygwin/ChangeLog
View File

@@ -1,3 +1,23 @@
Sun Sep 9 18:36:00 2001 Corinna Vinschen <corinna@vinschen.de>
Christopher Faylor <cgf@cygnus.com>
* cygheap.cc (init_cygheap::etc_changed): New method to signal
a change in /etc.
* cygheap.h (struct init_cygheap): Add member `etc_changed_h'
and method `etc_changed'.
* grp.cc (enum grp_state): Eliminate.
(class grp_check): Ditto.
(group_state): Define as `class pwdgrp_check'.
(parse_grp): Remeber path and modification time of /etc/group file.
* passwd.cc (enum_pwd_state): Eliminate.
(class pwd_check): Ditto.
(passwd_state): Define as `class pwdgrp_check'.
(read_etc_passwd): Remember path and modification time of /etc/passwd
file.
* pwdgrp.h: New file.
(enum pwdgrp_state): Substitutes `pwd_state' and `grp_state'.
(class pwdgrp_check): Substitutes `pwd_check' and `grp_check'.
Sun Sep 9 14:31:00 2001 Corinna Vinschen <corinna@vinschen.de>
* include/cygwin/version.h: Bump API minor version to 45 according

34
winsup/cygwin/cygheap.cc
View File

@@ -16,6 +16,7 @@
#include "security.h"
#include "fhandler.h"
#include "dtable.h"
#include "path.h"
#include "cygheap.h"
#include "child_info.h"
#include "heap.h"
@@ -345,6 +346,39 @@ cstrdup1 (const char *s)
return p;
}
bool
init_cygheap::etc_changed ()
{
bool res = 0;
if (!etc_changed_h)
{
path_conv pwd ("/etc");
etc_changed_h = FindFirstChangeNotification (pwd, FALSE,
FILE_NOTIFY_CHANGE_LAST_WRITE);
if (etc_changed_h == INVALID_HANDLE_VALUE)
system_printf ("Can't open /etc for checking, %E", (char *) pwd,
etc_changed_h);
else if (!DuplicateHandle (hMainProc, etc_changed_h, hMainProc,
&etc_changed_h, 0, TRUE,
DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE))
{
system_printf ("Can't inherit /etc handle, %E", (char *) pwd,
etc_changed_h);
etc_changed_h = INVALID_HANDLE_VALUE;
}
}
if (etc_changed_h != INVALID_HANDLE_VALUE
&& WaitForSingleObject (etc_changed_h, 0) == WAIT_OBJECT_0)
{
(void) FindNextChangeNotification (etc_changed_h);
res = 1;
}
return res;
}
void
cygheap_root::set (const char *posix, const char *native)
{

3
winsup/cygwin/cygheap.h
View File

@@ -161,8 +161,11 @@ struct init_cygheap
mode_t umask;
HANDLE shared_h;
HANDLE console_h;
HANDLE etc_changed_h;
cwdstuff cwd;
dtable fdtab;
bool etc_changed ();
};
#define CYGHEAPSIZE (sizeof (init_cygheap) + (4000 * sizeof (fhandler_union)) + (2 * 65536))

54
winsup/cygwin/grp.cc
View File

@@ -26,6 +26,7 @@ details. */
#include "path.h"
#include "cygheap.h"
#include "cygerrno.h"
#include "pwdgrp.h"
/* Read /etc/group only once for better performance. This is done
on the first call that needs information from it. */
@@ -42,57 +43,7 @@ static int max_lines;
static int grp_pos = 0;
#endif
/* Set to loaded when /etc/passwd has been read in by read_etc_passwd ().
Set to emulated if passwd is emulated. */
/* Functions in this file need to check the value of passwd_state
and read in the password file if it isn't set. */
enum grp_state {
uninitialized = 0,
initializing,
emulated,
loaded
};
class grp_check {
grp_state state;
FILETIME last_modified;
char grp_w32[MAX_PATH];
public:
grp_check () : state (uninitialized)
{
last_modified.dwLowDateTime = last_modified.dwHighDateTime = 0;
grp_w32[0] = '\0';
}
operator grp_state ()
{
HANDLE h;
WIN32_FIND_DATA data;
if (!grp_w32[0]) /* First call. */
{
path_conv g ("/etc/group", PC_SYM_FOLLOW | PC_FULL);
if (!g.error)
strcpy (grp_w32, g.get_win32 ());
}
if ((h = FindFirstFile (grp_w32, &data)) != INVALID_HANDLE_VALUE)
{
if (CompareFileTime (&data.ftLastWriteTime, &last_modified) > 0)
{
state = uninitialized;
last_modified = data.ftLastWriteTime;
}
FindClose (h);
}
return state;
}
void operator = (grp_state nstate)
{
state = nstate;
}
};
static grp_check group_state;
static pwdgrp_check group_state;
static int
parse_grp (struct group &grp, const char *line)
@@ -215,6 +166,7 @@ read_etc_group ()
add_grp_line (linebuf);
}
group_state.set_last_modified (f);
fclose (f);
group_state = loaded;
}

56
winsup/cygwin/passwd.cc
View File

@@ -1,6 +1,6 @@
/* passwd.cc: getpwnam () and friends
Copyright 1996, 1997, 1998 Cygnus Solutions.
Copyright 1996, 1997, 1998, 2001 Cygnus Solutions.
This file is part of Cygwin.
@@ -23,6 +23,7 @@ details. */
#include "pinfo.h"
#include "cygheap.h"
#include <sys/termios.h>
#include "pwdgrp.h"
/* Read /etc/passwd only once for better performance. This is done
on the first call that needs information from it. */
@@ -31,57 +32,7 @@ static struct passwd *passwd_buf; /* passwd contents in memory */
static int curr_lines;
static int max_lines;
/* Set to loaded when /etc/passwd has been read in by read_etc_passwd ().
Set to emulated if passwd is emulated. */
/* Functions in this file need to check the value of passwd_state
and read in the password file if it isn't set. */
enum pwd_state {
uninitialized = 0,
initializing,
emulated,
loaded
};
class pwd_check {
pwd_state state;
FILETIME last_modified;
char pwd_w32[MAX_PATH];
public:
pwd_check () : state (uninitialized)
{
last_modified.dwLowDateTime = last_modified.dwHighDateTime = 0;
pwd_w32[0] = '\0';
}
operator pwd_state ()
{
HANDLE h;
WIN32_FIND_DATA data;
if (!pwd_w32[0]) /* First call. */
{
path_conv p ("/etc/passwd", PC_SYM_FOLLOW | PC_FULL);
if (!p.error)
strcpy (pwd_w32, p.get_win32 ());
}
if ((h = FindFirstFile (pwd_w32, &data)) != INVALID_HANDLE_VALUE)
{
if (CompareFileTime (&data.ftLastWriteTime, &last_modified) > 0)
{
state = uninitialized;
last_modified = data.ftLastWriteTime;
}
FindClose (h);
}
return state;
}
void operator = (pwd_state nstate)
{
state = nstate;
}
};
static pwd_check passwd_state;
static pwdgrp_check passwd_state;
/* Position in the passwd cache */
@@ -200,6 +151,7 @@ read_etc_passwd ()
add_pwd_line (linebuf);
}
passwd_state.set_last_modified (f);
fclose (f);
passwd_state = loaded;
}

57
winsup/cygwin/pwdgrp.h Normal file
View File

@@ -0,0 +1,57 @@
/* pwdgrp.h
Copyright 2001 Red Hat inc.
Stuff common to pwd and grp handling.
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. */
enum pwdgrp_state {
uninitialized = 0,
initializing,
emulated,
loaded
};
class pwdgrp_check {
pwdgrp_state state;
FILETIME last_modified;
char file_w32[MAX_PATH];
public:
pwdgrp_check () : state (uninitialized) {}
operator pwdgrp_state ()
{
if (state != uninitialized && file_w32[0] && cygheap->etc_changed ())
{
HANDLE h;
WIN32_FIND_DATA data;
if ((h = FindFirstFile (file_w32, &data)) != INVALID_HANDLE_VALUE)
{
if (CompareFileTime (&data.ftLastWriteTime, &last_modified) > 0)
state = uninitialized;
FindClose (h);
}
}
return state;
}
void operator = (pwdgrp_state nstate)
{
state = nstate;
}
void set_last_modified (FILE *f)
{
if (!file_w32[0])
strcpy (file_w32, cygheap->fdtab[fileno (f)]->get_win32_name ());
BY_HANDLE_FILE_INFORMATION inf;
if (GetFileInformationByHandle (cygheap->fdtab[fileno (f)]->get_handle (),
&inf))
last_modified = inf.ftLastWriteTime;
}
};

3
winsup/cygwin/winsup.h
View File

@@ -214,6 +214,9 @@ extern "C" int __small_vsprintf (char *dst, const char *fmt, va_list ap) /*__att
extern "C" void __malloc_lock (struct _reent *);
extern "C" void __malloc_unlock (struct _reent *);
extern "C" void __malloc_lock (struct _reent *);
extern "C" void __malloc_unlock (struct _reent *);
/**************************** Exports ******************************/
extern "C" {