mirror of
git://anongit.mindrot.org/openssh.git
synced 2024-12-17 07:34:34 +00:00
106 lines
2.4 KiB
C
106 lines
2.4 KiB
C
/*
|
|
*
|
|
* cygwin_util.c
|
|
*
|
|
* Author: Corinna Vinschen <vinschen@cygnus.com>
|
|
*
|
|
* Copyright (c) 2000 Corinna Vinschen <vinschen@cygnus.com>, Duisburg, Germany
|
|
* All rights reserved
|
|
*
|
|
* Created: Sat Sep 02 12:17:00 2000 cv
|
|
*
|
|
* This file contains functions for forcing opened file descriptors to
|
|
* binary mode on Windows systems.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#ifdef HAVE_CYGWIN
|
|
|
|
#include <fcntl.h>
|
|
#include <io.h>
|
|
#include <stdlib.h>
|
|
#include <sys/vfs.h>
|
|
#include <windows.h>
|
|
#define is_winnt (GetVersion() < 0x80000000)
|
|
|
|
int binary_open(const char *filename, int flags, mode_t mode)
|
|
{
|
|
return open(filename, flags | O_BINARY, mode);
|
|
}
|
|
|
|
int binary_pipe(int fd[2])
|
|
{
|
|
int ret = pipe(fd);
|
|
|
|
if (!ret) {
|
|
setmode (fd[0], O_BINARY);
|
|
setmode (fd[1], O_BINARY);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int check_nt_auth(int pwd_authenticated, uid_t uid)
|
|
{
|
|
/*
|
|
* The only authentication which is able to change the user
|
|
* context on NT systems is the password authentication. So
|
|
* we deny all requsts for changing the user context if another
|
|
* authentication method is used.
|
|
* This may change in future when a special openssh
|
|
* subauthentication package is available.
|
|
*/
|
|
if (is_winnt && !pwd_authenticated && geteuid() != uid)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int check_ntsec(const char *filename)
|
|
{
|
|
char *cygwin;
|
|
int allow_ntea = 0;
|
|
int allow_ntsec = 0;
|
|
struct statfs fsstat;
|
|
|
|
/* Windows 95/98/ME don't support file system security at all. */
|
|
if (!is_winnt)
|
|
return 0;
|
|
|
|
/* Evaluate current CYGWIN settings. */
|
|
if ((cygwin = getenv("CYGWIN")) != NULL) {
|
|
if (strstr(cygwin, "ntea") && !strstr(cygwin, "nontea"))
|
|
allow_ntea = 1;
|
|
if (strstr(cygwin, "ntsec") && !strstr(cygwin, "nontsec"))
|
|
allow_ntsec = 1;
|
|
}
|
|
|
|
/*
|
|
* `ntea' is an emulation of POSIX attributes. It doesn't support
|
|
* real file level security as ntsec on NTFS file systems does
|
|
* but it supports FAT filesystems. `ntea' is minimum requirement
|
|
* for security checks.
|
|
*/
|
|
if (allow_ntea)
|
|
return 1;
|
|
|
|
/*
|
|
* Retrieve file system flags. In Cygwin, file system flags are
|
|
* copied to f_type which has no meaning in Win32 itself.
|
|
*/
|
|
if (statfs(filename, &fsstat))
|
|
return 1;
|
|
|
|
/*
|
|
* Only file systems supporting ACLs are able to set permissions.
|
|
* `ntsec' is the setting in Cygwin which switches using of NTFS
|
|
* ACLs to support POSIX permissions on files.
|
|
*/
|
|
if (fsstat.f_type & FS_PERSISTENT_ACLS)
|
|
return allow_ntsec;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* HAVE_CYGWIN */
|