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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 | ||
0b202697 | 16 | #include "includes.h" |
17 | ||
18 | RCSID("$Id$"); | |
3c62e7eb | 19 | |
20 | #ifdef HAVE_CYGWIN | |
2f125ca1 | 21 | |
3c62e7eb | 22 | #include <fcntl.h> |
9cd45ea4 | 23 | #include <stdlib.h> |
24 | #include <sys/vfs.h> | |
25 | #include <windows.h> | |
26 | #define is_winnt (GetVersion() < 0x80000000) | |
3c62e7eb | 27 | |
58e7f038 | 28 | #if defined(open) && open == binary_open |
29 | # undef open | |
30 | #endif | |
31 | #if defined(pipe) && open == binary_pipe | |
32 | # undef pipe | |
33 | #endif | |
34 | ||
35 | int binary_open(const char *filename, int flags, ...) | |
3c62e7eb | 36 | { |
58e7f038 | 37 | va_list ap; |
38 | mode_t mode; | |
39 | ||
40 | va_start(ap, flags); | |
41 | mode = va_arg(ap, mode_t); | |
42 | va_end(ap); | |
2f125ca1 | 43 | return open(filename, flags | O_BINARY, mode); |
3c62e7eb | 44 | } |
45 | ||
46 | int binary_pipe(int fd[2]) | |
47 | { | |
2f125ca1 | 48 | int ret = pipe(fd); |
49 | ||
50 | if (!ret) { | |
51 | setmode (fd[0], O_BINARY); | |
52 | setmode (fd[1], O_BINARY); | |
53 | } | |
54 | return ret; | |
9cd45ea4 | 55 | } |
56 | ||
2f125ca1 | 57 | int check_nt_auth(int pwd_authenticated, uid_t uid) |
9cd45ea4 | 58 | { |
59 | /* | |
2f125ca1 | 60 | * The only authentication which is able to change the user |
61 | * context on NT systems is the password authentication. So | |
62 | * we deny all requsts for changing the user context if another | |
63 | * authentication method is used. | |
64 | * This may change in future when a special openssh | |
65 | * subauthentication package is available. | |
66 | */ | |
9cd45ea4 | 67 | if (is_winnt && !pwd_authenticated && geteuid() != uid) |
68 | return 0; | |
2f125ca1 | 69 | |
9cd45ea4 | 70 | return 1; |
71 | } | |
72 | ||
2f125ca1 | 73 | int check_ntsec(const char *filename) |
9cd45ea4 | 74 | { |
75 | char *cygwin; | |
76 | int allow_ntea = 0; | |
77 | int allow_ntsec = 0; | |
78 | struct statfs fsstat; | |
79 | ||
80 | /* Windows 95/98/ME don't support file system security at all. */ | |
81 | if (!is_winnt) | |
82 | return 0; | |
83 | ||
84 | /* Evaluate current CYGWIN settings. */ | |
85 | if ((cygwin = getenv("CYGWIN")) != NULL) { | |
86 | if (strstr(cygwin, "ntea") && !strstr(cygwin, "nontea")) | |
87 | allow_ntea = 1; | |
88 | if (strstr(cygwin, "ntsec") && !strstr(cygwin, "nontsec")) | |
89 | allow_ntsec = 1; | |
90 | } | |
91 | ||
92 | /* | |
93 | * `ntea' is an emulation of POSIX attributes. It doesn't support | |
94 | * real file level security as ntsec on NTFS file systems does | |
95 | * but it supports FAT filesystems. `ntea' is minimum requirement | |
96 | * for security checks. | |
97 | */ | |
98 | if (allow_ntea) | |
99 | return 1; | |
100 | ||
101 | /* | |
102 | * Retrieve file system flags. In Cygwin, file system flags are | |
103 | * copied to f_type which has no meaning in Win32 itself. | |
104 | */ | |
105 | if (statfs(filename, &fsstat)) | |
106 | return 1; | |
107 | ||
108 | /* | |
109 | * Only file systems supporting ACLs are able to set permissions. | |
110 | * `ntsec' is the setting in Cygwin which switches using of NTFS | |
111 | * ACLs to support POSIX permissions on files. | |
112 | */ | |
113 | if (fsstat.f_type & FS_PERSISTENT_ACLS) | |
114 | return allow_ntsec; | |
115 | ||
116 | return 0; | |
3c62e7eb | 117 | } |
2f125ca1 | 118 | |
119 | #endif /* HAVE_CYGWIN */ |