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Commit | Line | Data |
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3c62e7eb | 1 | /* |
2 | * | |
3 | * cygwin_util.c | |
4 | * | |
5 | * Author: Corinna Vinschen <vinschen@cygnus.com> | |
6 | * | |
7 | * Copyright (c) 2000 Corinna Vinschen <vinschen@cygnus.com>, Duisburg, Germany | |
8 | * All rights reserved | |
9 | * | |
10 | * Created: Sat Sep 02 12:17:00 2000 cv | |
11 | * | |
12 | * This file contains functions for forcing opened file descriptors to | |
13 | * binary mode on Windows systems. | |
14 | */ | |
15 | ||
16 | #include "config.h" | |
17 | ||
18 | #ifdef HAVE_CYGWIN | |
2f125ca1 | 19 | |
3c62e7eb | 20 | #include <fcntl.h> |
21 | #include <io.h> | |
9cd45ea4 | 22 | #include <stdlib.h> |
23 | #include <sys/vfs.h> | |
24 | #include <windows.h> | |
25 | #define is_winnt (GetVersion() < 0x80000000) | |
3c62e7eb | 26 | |
27 | int binary_open(const char *filename, int flags, mode_t mode) | |
28 | { | |
2f125ca1 | 29 | return open(filename, flags | O_BINARY, mode); |
3c62e7eb | 30 | } |
31 | ||
32 | int binary_pipe(int fd[2]) | |
33 | { | |
2f125ca1 | 34 | int ret = pipe(fd); |
35 | ||
36 | if (!ret) { | |
37 | setmode (fd[0], O_BINARY); | |
38 | setmode (fd[1], O_BINARY); | |
39 | } | |
40 | return ret; | |
9cd45ea4 | 41 | } |
42 | ||
2f125ca1 | 43 | int check_nt_auth(int pwd_authenticated, uid_t uid) |
9cd45ea4 | 44 | { |
45 | /* | |
2f125ca1 | 46 | * The only authentication which is able to change the user |
47 | * context on NT systems is the password authentication. So | |
48 | * we deny all requsts for changing the user context if another | |
49 | * authentication method is used. | |
50 | * This may change in future when a special openssh | |
51 | * subauthentication package is available. | |
52 | */ | |
9cd45ea4 | 53 | if (is_winnt && !pwd_authenticated && geteuid() != uid) |
54 | return 0; | |
2f125ca1 | 55 | |
9cd45ea4 | 56 | return 1; |
57 | } | |
58 | ||
2f125ca1 | 59 | int check_ntsec(const char *filename) |
9cd45ea4 | 60 | { |
61 | char *cygwin; | |
62 | int allow_ntea = 0; | |
63 | int allow_ntsec = 0; | |
64 | struct statfs fsstat; | |
65 | ||
66 | /* Windows 95/98/ME don't support file system security at all. */ | |
67 | if (!is_winnt) | |
68 | return 0; | |
69 | ||
70 | /* Evaluate current CYGWIN settings. */ | |
71 | if ((cygwin = getenv("CYGWIN")) != NULL) { | |
72 | if (strstr(cygwin, "ntea") && !strstr(cygwin, "nontea")) | |
73 | allow_ntea = 1; | |
74 | if (strstr(cygwin, "ntsec") && !strstr(cygwin, "nontsec")) | |
75 | allow_ntsec = 1; | |
76 | } | |
77 | ||
78 | /* | |
79 | * `ntea' is an emulation of POSIX attributes. It doesn't support | |
80 | * real file level security as ntsec on NTFS file systems does | |
81 | * but it supports FAT filesystems. `ntea' is minimum requirement | |
82 | * for security checks. | |
83 | */ | |
84 | if (allow_ntea) | |
85 | return 1; | |
86 | ||
87 | /* | |
88 | * Retrieve file system flags. In Cygwin, file system flags are | |
89 | * copied to f_type which has no meaning in Win32 itself. | |
90 | */ | |
91 | if (statfs(filename, &fsstat)) | |
92 | return 1; | |
93 | ||
94 | /* | |
95 | * Only file systems supporting ACLs are able to set permissions. | |
96 | * `ntsec' is the setting in Cygwin which switches using of NTFS | |
97 | * ACLs to support POSIX permissions on files. | |
98 | */ | |
99 | if (fsstat.f_type & FS_PERSISTENT_ACLS) | |
100 | return allow_ntsec; | |
101 | ||
102 | return 0; | |
3c62e7eb | 103 | } |
2f125ca1 | 104 | |
105 | #endif /* HAVE_CYGWIN */ |