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

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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

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;
}