Mercurial > dovecot > core-2.2

annotate src/lib/fdpass.c @ 22664:fea53c2725c0

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
director: Fix director_max_parallel_moves/kicks type Should be uint, not time.
author Timo Sirainen <timo.sirainen@dovecot.fi>
date Thu, 09 Nov 2017 12:24:16 +0200
parents 2e2563132d5f
children cb108f786fb4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
21390
2e2563132d5f Updated copyright notices to include the year 2017.
Stephan Bosch <stephan.bosch@dovecot.fi>
parents: 19552
diff changeset
1 /* Copyright (c) 2002-2017 Dovecot authors, see the included COPYING file */
1338
04ed7a2536cc Tru64 fixes. More comments.
Timo Sirainen <tss@iki.fi>
parents: 1332
diff changeset
2
1740
219b6e9e82f1 Fix for IRIX (plus comment cleanups)
Timo Sirainen <tss@iki.fi>
parents: 1432
diff changeset
3 /*
219b6e9e82f1 Fix for IRIX (plus comment cleanups)
Timo Sirainen <tss@iki.fi>
parents: 1432
diff changeset
4 fdpass.c - File descriptor passing between processes via UNIX sockets
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
5
1740
219b6e9e82f1 Fix for IRIX (plus comment cleanups)
Timo Sirainen <tss@iki.fi>
parents: 1432
diff changeset
6 This isn't fully portable, but pretty much all UNIXes nowadays should
2348
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
7 support this. If you're having runtime problems with fd_read(), check the
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
8 end of fd_read() and play with the if condition. If you're having problems
2349
b65456de1b49 Check BUGGY_CMSG_MACROS in configure.
Timo Sirainen <tss@iki.fi>
parents: 2348
diff changeset
9 with fd_send(), try defining BUGGY_CMSG_MACROS.
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
10
1740
219b6e9e82f1 Fix for IRIX (plus comment cleanups)
Timo Sirainen <tss@iki.fi>
parents: 1432
diff changeset
11 If this file doesn't compile at all, you should check if this is supported
219b6e9e82f1 Fix for IRIX (plus comment cleanups)
Timo Sirainen <tss@iki.fi>
parents: 1432
diff changeset
12 in your system at all. It may require some extra #define to enable it.
219b6e9e82f1 Fix for IRIX (plus comment cleanups)
Timo Sirainen <tss@iki.fi>
parents: 1432
diff changeset
13 If not, you're pretty much out of luck. Cygwin didn't last I checked.
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
14 */
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
15
350
2c6b6594a14b compiler fixes
Timo Sirainen <tss@iki.fi>
parents: 345
diff changeset
16 #define _XPG4_2
1372
7a7e58744e0a AIX fixes.
Timo Sirainen <tss@iki.fi>
parents: 1338
diff changeset
17
1411
027a528ebf01 Define _XOPEN_SOURCE only for IRIX.
Timo Sirainen <tss@iki.fi>
parents: 1405
diff changeset
18 #if defined(irix) || defined (__irix__) || defined(sgi) || defined (__sgi__)
1740
219b6e9e82f1 Fix for IRIX (plus comment cleanups)
Timo Sirainen <tss@iki.fi>
parents: 1432
diff changeset
19 # define _XOPEN_SOURCE 4 /* for IRIX */
1411
027a528ebf01 Define _XOPEN_SOURCE only for IRIX.
Timo Sirainen <tss@iki.fi>
parents: 1405
diff changeset
20 #endif
027a528ebf01 Define _XOPEN_SOURCE only for IRIX.
Timo Sirainen <tss@iki.fi>
parents: 1405
diff changeset
21
1426
f5b3575194ed Don't redefine _XOPEN_SOURCE_EXTENDED.
Timo Sirainen <tss@iki.fi>
parents: 1411
diff changeset
22 #if !defined(_AIX) && !defined(_XOPEN_SOURCE_EXTENDED)
1372
7a7e58744e0a AIX fixes.
Timo Sirainen <tss@iki.fi>
parents: 1338
diff changeset
23 # define _XOPEN_SOURCE_EXTENDED /* for Tru64, breaks AIX */
7a7e58744e0a AIX fixes.
Timo Sirainen <tss@iki.fi>
parents: 1338
diff changeset
24 #endif
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
25
2389
98cbbce48f9f include lib.h first
Timo Sirainen <tss@iki.fi>
parents: 2349
diff changeset
26 #ifdef HAVE_CONFIG_H
98cbbce48f9f include lib.h first
Timo Sirainen <tss@iki.fi>
parents: 2349
diff changeset
27 # include "lib.h"
98cbbce48f9f include lib.h first
Timo Sirainen <tss@iki.fi>
parents: 2349
diff changeset
28 #else
98cbbce48f9f include lib.h first
Timo Sirainen <tss@iki.fi>
parents: 2349
diff changeset
29 # define i_assert(x)
98cbbce48f9f include lib.h first
Timo Sirainen <tss@iki.fi>
parents: 2349
diff changeset
30 #endif
98cbbce48f9f include lib.h first
Timo Sirainen <tss@iki.fi>
parents: 2349
diff changeset
31
2349
b65456de1b49 Check BUGGY_CMSG_MACROS in configure.
Timo Sirainen <tss@iki.fi>
parents: 2348
diff changeset
32 #include <string.h>
b65456de1b49 Check BUGGY_CMSG_MACROS in configure.
Timo Sirainen <tss@iki.fi>
parents: 2348
diff changeset
33 #include <limits.h>
b65456de1b49 Check BUGGY_CMSG_MACROS in configure.
Timo Sirainen <tss@iki.fi>
parents: 2348
diff changeset
34 #include <sys/types.h>
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
35
467
fd24b81a7f04 include sys/socket.h, not network.h. Required with solaris+ipv6 where
Timo Sirainen <tss@iki.fi>
parents: 350
diff changeset
36 #include <sys/socket.h>
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
37 #include <sys/un.h>
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
38 #include <sys/uio.h>
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
39
2349
b65456de1b49 Check BUGGY_CMSG_MACROS in configure.
Timo Sirainen <tss@iki.fi>
parents: 2348
diff changeset
40 #include "fdpass.h"
b65456de1b49 Check BUGGY_CMSG_MACROS in configure.
Timo Sirainen <tss@iki.fi>
parents: 2348
diff changeset
41
11838
fd79394f7652 configure wasn't compiling fd pass checking program correctly.
Timo Sirainen <tss@iki.fi>
parents: 10998
diff changeset
42 #ifndef HAVE_CONFIG_H
fd79394f7652 configure wasn't compiling fd pass checking program correctly.
Timo Sirainen <tss@iki.fi>
parents: 10998
diff changeset
43 struct const_iovec {
fd79394f7652 configure wasn't compiling fd pass checking program correctly.
Timo Sirainen <tss@iki.fi>
parents: 10998
diff changeset
44 const void *iov_base;
fd79394f7652 configure wasn't compiling fd pass checking program correctly.
Timo Sirainen <tss@iki.fi>
parents: 10998
diff changeset
45 size_t iov_len;
fd79394f7652 configure wasn't compiling fd pass checking program correctly.
Timo Sirainen <tss@iki.fi>
parents: 10998
diff changeset
46 };
fd79394f7652 configure wasn't compiling fd pass checking program correctly.
Timo Sirainen <tss@iki.fi>
parents: 10998
diff changeset
47 #endif
fd79394f7652 configure wasn't compiling fd pass checking program correctly.
Timo Sirainen <tss@iki.fi>
parents: 10998
diff changeset
48
2348
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
49 /* RFC 2292 defines CMSG_*() macros, but some operating systems don't have them
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
50 so we'll define our own if they don't exist.
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
51
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
52 CMSG_LEN(data) is used to calculate size of sizeof(struct cmsghdr) +
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
53 sizeof(data) and padding between them.
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
54
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
55 CMSG_SPACE(data) also calculates the padding needed after the data, in case
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
56 multiple objects are sent.
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
57
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
58 cmsghdr contains cmsg_len field and two integers. cmsg_len is sometimes
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
59 defined as sockaddr_t and sometimes size_t, so it can be either 32bit or
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
60 64bit. This padding is added by compiler in sizeof(struct cmsghdr).
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
61
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
62 Padding required by CMSG_DATA() can vary. Usually it wants size_t or 32bit.
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
63 With Solaris it's in _CMSG_DATA_ALIGNMENT (32bit), we assume others want
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
64 size_t.
2253
509923906599 added comment about solaris and changed the macros once again, although may
Timo Sirainen <tss@iki.fi>
parents: 2185
diff changeset
65
2348
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
66 We don't really need CMSG_SPACE() to be exactly correct, because currently
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
67 we send only one object at a time. But anyway I'm trying to keep that
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
68 correct in case it's sometimes needed..
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
69 */
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
70
2349
b65456de1b49 Check BUGGY_CMSG_MACROS in configure.
Timo Sirainen <tss@iki.fi>
parents: 2348
diff changeset
71 #ifdef BUGGY_CMSG_MACROS
2348
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
72 /* Some OSes have broken CMSG macros in 64bit systems. The macros use 64bit
7410
b3c900eb7e83 Apparently "alignmentation" isn't a word. Changed to "alignment".
Timo Sirainen <tss@iki.fi>
parents: 7086
diff changeset
73 alignment while kernel uses 32bit alignment. */
2348
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
74 # undef CMSG_SPACE
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
75 # undef CMSG_LEN
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
76 # undef CMSG_DATA
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
77 # define CMSG_DATA(cmsg) ((char *)((cmsg) + 1))
2349
b65456de1b49 Check BUGGY_CMSG_MACROS in configure.
Timo Sirainen <tss@iki.fi>
parents: 2348
diff changeset
78 # define _CMSG_DATA_ALIGNMENT 4
b65456de1b49 Check BUGGY_CMSG_MACROS in configure.
Timo Sirainen <tss@iki.fi>
parents: 2348
diff changeset
79 # define _CMSG_HDR_ALIGNMENT 4
2348
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
80 #endif
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
81
345
9efeeb4ac5a9 Define CMSG_SPACE always if it's undefined, not only if __sun__ is defined.
Timo Sirainen <tss@iki.fi>
parents: 183
diff changeset
82 #ifndef CMSG_SPACE
2348
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
83 # define MY_ALIGN(len, align) \
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
84 (((len) + align - 1) & ~(align - 1))
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
85
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
86 /* Alignment between cmsghdr and data */
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
87 # ifndef _CMSG_DATA_ALIGNMENT
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
88 # define _CMSG_DATA_ALIGNMENT sizeof(size_t)
2127
5cb49f75e512 Solaris fix by Tim Hurman
Timo Sirainen <tss@iki.fi>
parents: 1896
diff changeset
89 # endif
2348
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
90 /* Alignment between data and next cmsghdr */
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
91 # ifndef _CMSG_HDR_ALIGNMENT
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
92 # define _CMSG_HDR_ALIGNMENT sizeof(size_t)
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
93 # endif
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
94
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
95 # define CMSG_SPACE(len) \
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
96 (MY_ALIGN(sizeof(struct cmsghdr), _CMSG_DATA_ALIGNMENT) + \
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
97 MY_ALIGN(len, _CMSG_HDR_ALIGNMENT))
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
98 # define CMSG_LEN(len) \
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
99 (MY_ALIGN(sizeof(struct cmsghdr), _CMSG_DATA_ALIGNMENT) + (len))
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
100 #endif
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
101
1428
5693bddad736 Compile even if SCM_RIGHTS isn't supported.
Timo Sirainen <tss@iki.fi>
parents: 1426
diff changeset
102 #ifdef SCM_RIGHTS
5693bddad736 Compile even if SCM_RIGHTS isn't supported.
Timo Sirainen <tss@iki.fi>
parents: 1426
diff changeset
103
612
7c91f579ebed Some fixes, cleanups and possibility to send/receive data without actually
Timo Sirainen <tss@iki.fi>
parents: 467
diff changeset
104 ssize_t fd_send(int handle, int send_fd, const void *data, size_t size)
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
105 {
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
106 struct msghdr msg;
10998
be5b93c18203 Avoid casting away const qualifiers wherever possible.
Timo Sirainen <tss@iki.fi>
parents: 10582
diff changeset
107 struct const_iovec iov;
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
108 struct cmsghdr *cmsg;
183
4a7ab9e94f25 size_t fixes for lib/. Changed OFF_T_FORMAT to PRIuOFF_T which is more
Timo Sirainen <tss@iki.fi>
parents: 107
diff changeset
109 char buf[CMSG_SPACE(sizeof(int))];
4a7ab9e94f25 size_t fixes for lib/. Changed OFF_T_FORMAT to PRIuOFF_T which is more
Timo Sirainen <tss@iki.fi>
parents: 107
diff changeset
110
871
28212c00d147 more fixes
Timo Sirainen <tss@iki.fi>
parents: 870
diff changeset
111 /* at least one byte is required to be sent with fd passing */
2349
b65456de1b49 Check BUGGY_CMSG_MACROS in configure.
Timo Sirainen <tss@iki.fi>
parents: 2348
diff changeset
112 i_assert(size > 0 && size < INT_MAX);
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
113
2348
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
114 memset(&msg, 0, sizeof(struct msghdr));
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
115
10998
be5b93c18203 Avoid casting away const qualifiers wherever possible.
Timo Sirainen <tss@iki.fi>
parents: 10582
diff changeset
116 iov.iov_base = data;
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
117 iov.iov_len = size;
612
7c91f579ebed Some fixes, cleanups and possibility to send/receive data without actually
Timo Sirainen <tss@iki.fi>
parents: 467
diff changeset
118
10998
be5b93c18203 Avoid casting away const qualifiers wherever possible.
Timo Sirainen <tss@iki.fi>
parents: 10582
diff changeset
119 msg.msg_iov = (void *)&iov;
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
120 msg.msg_iovlen = 1;
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
121
612
7c91f579ebed Some fixes, cleanups and possibility to send/receive data without actually
Timo Sirainen <tss@iki.fi>
parents: 467
diff changeset
122 if (send_fd != -1) {
2348
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
123 /* set the control and controllen before CMSG_FIRSTHDR(). */
2185
078da7741971 Fix for the previous Solaris fix. fd_send() was sending two fds.
Timo Sirainen <tss@iki.fi>
parents: 2127
diff changeset
124 memset(buf, 0, sizeof(buf));
870
971947c0034f Fixed to work with 64bit BSD systems.
Timo Sirainen <tss@iki.fi>
parents: 612
diff changeset
125 msg.msg_control = buf;
971947c0034f Fixed to work with 64bit BSD systems.
Timo Sirainen <tss@iki.fi>
parents: 612
diff changeset
126 msg.msg_controllen = sizeof(buf);
971947c0034f Fixed to work with 64bit BSD systems.
Timo Sirainen <tss@iki.fi>
parents: 612
diff changeset
127
612
7c91f579ebed Some fixes, cleanups and possibility to send/receive data without actually
Timo Sirainen <tss@iki.fi>
parents: 467
diff changeset
128 cmsg = CMSG_FIRSTHDR(&msg);
7c91f579ebed Some fixes, cleanups and possibility to send/receive data without actually
Timo Sirainen <tss@iki.fi>
parents: 467
diff changeset
129 cmsg->cmsg_level = SOL_SOCKET;
7c91f579ebed Some fixes, cleanups and possibility to send/receive data without actually
Timo Sirainen <tss@iki.fi>
parents: 467
diff changeset
130 cmsg->cmsg_type = SCM_RIGHTS;
7c91f579ebed Some fixes, cleanups and possibility to send/receive data without actually
Timo Sirainen <tss@iki.fi>
parents: 467
diff changeset
131 cmsg->cmsg_len = CMSG_LEN(sizeof(int));
12130
bdf922d26534 fdpass: Use memcpy() to access data in CMSG_DATA().
Timo Sirainen <tss@iki.fi>
parents: 12083
diff changeset
132 memcpy(CMSG_DATA(cmsg), &send_fd, sizeof(send_fd));
870
971947c0034f Fixed to work with 64bit BSD systems.
Timo Sirainen <tss@iki.fi>
parents: 612
diff changeset
133
2348
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
134 /* set the real length we want to use. Do it after all is
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
135 set just in case CMSG macros required the extra padding
65433665256d Added BUGGY_CMSG_HEADERS #define to workaround some OS bugs. Updated
Timo Sirainen <tss@iki.fi>
parents: 2253
diff changeset
136 in the end. */
870
971947c0034f Fixed to work with 64bit BSD systems.
Timo Sirainen <tss@iki.fi>
parents: 612
diff changeset
137 msg.msg_controllen = cmsg->cmsg_len;
612
7c91f579ebed Some fixes, cleanups and possibility to send/receive data without actually
Timo Sirainen <tss@iki.fi>
parents: 467
diff changeset
138 }
7c91f579ebed Some fixes, cleanups and possibility to send/receive data without actually
Timo Sirainen <tss@iki.fi>
parents: 467
diff changeset
139
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
140 return sendmsg(handle, &msg, 0);
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
141 }
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
142
1794
e1a7e38c17ed Put the msg/cmsg checks in CHECK_MSG() and CHECK_CMSG() macros. Add support
Timo Sirainen <tss@iki.fi>
parents: 1740
diff changeset
143 #ifdef LINUX20
e1a7e38c17ed Put the msg/cmsg checks in CHECK_MSG() and CHECK_CMSG() macros. Add support
Timo Sirainen <tss@iki.fi>
parents: 1740
diff changeset
144 /* Linux 2.0.x doesn't set any cmsg fields. Note that this might make some
e1a7e38c17ed Put the msg/cmsg checks in CHECK_MSG() and CHECK_CMSG() macros. Add support
Timo Sirainen <tss@iki.fi>
parents: 1740
diff changeset
145 attacks possible so don't do it unless you really have to. */
e1a7e38c17ed Put the msg/cmsg checks in CHECK_MSG() and CHECK_CMSG() macros. Add support
Timo Sirainen <tss@iki.fi>
parents: 1740
diff changeset
146 # define CHECK_CMSG(cmsg) ((cmsg) != NULL)
e1a7e38c17ed Put the msg/cmsg checks in CHECK_MSG() and CHECK_CMSG() macros. Add support
Timo Sirainen <tss@iki.fi>
parents: 1740
diff changeset
147 #else
e1a7e38c17ed Put the msg/cmsg checks in CHECK_MSG() and CHECK_CMSG() macros. Add support
Timo Sirainen <tss@iki.fi>
parents: 1740
diff changeset
148 # define CHECK_CMSG(cmsg) \
1896
0613ad9d5034 warning fixes
Timo Sirainen <tss@iki.fi>
parents: 1794
diff changeset
149 ((cmsg) != NULL && \
0613ad9d5034 warning fixes
Timo Sirainen <tss@iki.fi>
parents: 1794
diff changeset
150 (size_t)(cmsg)->cmsg_len >= (size_t)CMSG_LEN(sizeof(int)) && \
1794
e1a7e38c17ed Put the msg/cmsg checks in CHECK_MSG() and CHECK_CMSG() macros. Add support
Timo Sirainen <tss@iki.fi>
parents: 1740
diff changeset
151 (cmsg)->cmsg_level == SOL_SOCKET && (cmsg)->cmsg_type == SCM_RIGHTS)
e1a7e38c17ed Put the msg/cmsg checks in CHECK_MSG() and CHECK_CMSG() macros. Add support
Timo Sirainen <tss@iki.fi>
parents: 1740
diff changeset
152 #endif
e1a7e38c17ed Put the msg/cmsg checks in CHECK_MSG() and CHECK_CMSG() macros. Add support
Timo Sirainen <tss@iki.fi>
parents: 1740
diff changeset
153
612
7c91f579ebed Some fixes, cleanups and possibility to send/receive data without actually
Timo Sirainen <tss@iki.fi>
parents: 467
diff changeset
154 ssize_t fd_read(int handle, void *data, size_t size, int *fd)
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
155 {
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
156 struct msghdr msg;
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
157 struct iovec iov;
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
158 struct cmsghdr *cmsg;
612
7c91f579ebed Some fixes, cleanups and possibility to send/receive data without actually
Timo Sirainen <tss@iki.fi>
parents: 467
diff changeset
159 ssize_t ret;
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
160 char buf[CMSG_SPACE(sizeof(int))];
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
161
2349
b65456de1b49 Check BUGGY_CMSG_MACROS in configure.
Timo Sirainen <tss@iki.fi>
parents: 2348
diff changeset
162 i_assert(size > 0 && size < INT_MAX);
183
4a7ab9e94f25 size_t fixes for lib/. Changed OFF_T_FORMAT to PRIuOFF_T which is more
Timo Sirainen <tss@iki.fi>
parents: 107
diff changeset
163
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
164 memset(&msg, 0, sizeof (struct msghdr));
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
165
871
28212c00d147 more fixes
Timo Sirainen <tss@iki.fi>
parents: 870
diff changeset
166 iov.iov_base = data;
28212c00d147 more fixes
Timo Sirainen <tss@iki.fi>
parents: 870
diff changeset
167 iov.iov_len = size;
28212c00d147 more fixes
Timo Sirainen <tss@iki.fi>
parents: 870
diff changeset
168
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
169 msg.msg_iov = &iov;
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
170 msg.msg_iovlen = 1;
871
28212c00d147 more fixes
Timo Sirainen <tss@iki.fi>
parents: 870
diff changeset
171
1105
02454eee1775 Have to check that msg_controllen is large enough, otherwise cmsg points to
Timo Sirainen <tss@iki.fi>
parents: 915
diff changeset
172 memset(buf, 0, sizeof(buf));
871
28212c00d147 more fixes
Timo Sirainen <tss@iki.fi>
parents: 870
diff changeset
173 msg.msg_control = buf;
910
e757c5fab691 fd_read() fixes, hopefully works better now.
Timo Sirainen <tss@iki.fi>
parents: 871
diff changeset
174 msg.msg_controllen = sizeof(buf);
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
175
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
176 ret = recvmsg(handle, &msg, 0);
915
f33a139029db Still some fixes, I broke Solaris 8.
Timo Sirainen <tss@iki.fi>
parents: 910
diff changeset
177 if (ret <= 0) {
f33a139029db Still some fixes, I broke Solaris 8.
Timo Sirainen <tss@iki.fi>
parents: 910
diff changeset
178 *fd = -1;
910
e757c5fab691 fd_read() fixes, hopefully works better now.
Timo Sirainen <tss@iki.fi>
parents: 871
diff changeset
179 return ret;
915
f33a139029db Still some fixes, I broke Solaris 8.
Timo Sirainen <tss@iki.fi>
parents: 910
diff changeset
180 }
910
e757c5fab691 fd_read() fixes, hopefully works better now.
Timo Sirainen <tss@iki.fi>
parents: 871
diff changeset
181
1338
04ed7a2536cc Tru64 fixes. More comments.
Timo Sirainen <tss@iki.fi>
parents: 1332
diff changeset
182 /* at least one byte transferred - we should have the fd now.
04ed7a2536cc Tru64 fixes. More comments.
Timo Sirainen <tss@iki.fi>
parents: 1332
diff changeset
183 do extra checks to make sure it really is an fd that is being
04ed7a2536cc Tru64 fixes. More comments.
Timo Sirainen <tss@iki.fi>
parents: 1332
diff changeset
184 transferred to avoid potential DoS conditions. some systems don't
17515
38cd37cea8b1 lib: fd_recv() no longer checks for msghdr.msg_controllen
Timo Sirainen <tss@iki.fi>
parents: 17356
diff changeset
185 set all these values correctly however so CHECK_CMSG() is somewhat
38cd37cea8b1 lib: fd_recv() no longer checks for msghdr.msg_controllen
Timo Sirainen <tss@iki.fi>
parents: 17356
diff changeset
186 system dependent */
910
e757c5fab691 fd_read() fixes, hopefully works better now.
Timo Sirainen <tss@iki.fi>
parents: 871
diff changeset
187 cmsg = CMSG_FIRSTHDR(&msg);
17515
38cd37cea8b1 lib: fd_recv() no longer checks for msghdr.msg_controllen
Timo Sirainen <tss@iki.fi>
parents: 17356
diff changeset
188 if (!CHECK_CMSG(cmsg))
612
7c91f579ebed Some fixes, cleanups and possibility to send/receive data without actually
Timo Sirainen <tss@iki.fi>
parents: 467
diff changeset
189 *fd = -1;
12130
bdf922d26534 fdpass: Use memcpy() to access data in CMSG_DATA().
Timo Sirainen <tss@iki.fi>
parents: 12083
diff changeset
190 else
bdf922d26534 fdpass: Use memcpy() to access data in CMSG_DATA().
Timo Sirainen <tss@iki.fi>
parents: 12083
diff changeset
191 memcpy(fd, CMSG_DATA(cmsg), sizeof(*fd));
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
192 return ret;
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
193 }
1428
5693bddad736 Compile even if SCM_RIGHTS isn't supported.
Timo Sirainen <tss@iki.fi>
parents: 1426
diff changeset
194
5693bddad736 Compile even if SCM_RIGHTS isn't supported.
Timo Sirainen <tss@iki.fi>
parents: 1426
diff changeset
195 #else
5693bddad736 Compile even if SCM_RIGHTS isn't supported.
Timo Sirainen <tss@iki.fi>
parents: 1426
diff changeset
196 # ifdef __GNUC__
5693bddad736 Compile even if SCM_RIGHTS isn't supported.
Timo Sirainen <tss@iki.fi>
parents: 1426
diff changeset
197 # warning SCM_RIGHTS not supported, privilege separation not possible
5693bddad736 Compile even if SCM_RIGHTS isn't supported.
Timo Sirainen <tss@iki.fi>
parents: 1426
diff changeset
198 # endif
6411
6a64e64fa3a3 Renamed __attr_*__ to ATTR_*. Renamed __attrs_used__ to ATTRS_DEFINED.
Timo Sirainen <tss@iki.fi>
parents: 2389
diff changeset
199 ssize_t fd_send(int handle ATTR_UNUSED, int send_fd ATTR_UNUSED,
6a64e64fa3a3 Renamed __attr_*__ to ATTR_*. Renamed __attrs_used__ to ATTRS_DEFINED.
Timo Sirainen <tss@iki.fi>
parents: 2389
diff changeset
200 const void *data ATTR_UNUSED, size_t size ATTR_UNUSED)
1428
5693bddad736 Compile even if SCM_RIGHTS isn't supported.
Timo Sirainen <tss@iki.fi>
parents: 1426
diff changeset
201 {
1432
13c0031b2522 Use ENOSYS rather than EINVAL for fd_send/fd_recv.
Timo Sirainen <tss@iki.fi>
parents: 1428
diff changeset
202 errno = ENOSYS;
1428
5693bddad736 Compile even if SCM_RIGHTS isn't supported.
Timo Sirainen <tss@iki.fi>
parents: 1426
diff changeset
203 return -1;
5693bddad736 Compile even if SCM_RIGHTS isn't supported.
Timo Sirainen <tss@iki.fi>
parents: 1426
diff changeset
204 }
5693bddad736 Compile even if SCM_RIGHTS isn't supported.
Timo Sirainen <tss@iki.fi>
parents: 1426
diff changeset
205
6411
6a64e64fa3a3 Renamed __attr_*__ to ATTR_*. Renamed __attrs_used__ to ATTRS_DEFINED.
Timo Sirainen <tss@iki.fi>
parents: 2389
diff changeset
206 ssize_t fd_read(int handle ATTR_UNUSED, void *data ATTR_UNUSED,
6a64e64fa3a3 Renamed __attr_*__ to ATTR_*. Renamed __attrs_used__ to ATTRS_DEFINED.
Timo Sirainen <tss@iki.fi>
parents: 2389
diff changeset
207 size_t size ATTR_UNUSED, int *fd ATTR_UNUSED)
1428
5693bddad736 Compile even if SCM_RIGHTS isn't supported.
Timo Sirainen <tss@iki.fi>
parents: 1426
diff changeset
208 {
1432
13c0031b2522 Use ENOSYS rather than EINVAL for fd_send/fd_recv.
Timo Sirainen <tss@iki.fi>
parents: 1428
diff changeset
209 errno = ENOSYS;
1428
5693bddad736 Compile even if SCM_RIGHTS isn't supported.
Timo Sirainen <tss@iki.fi>
parents: 1426
diff changeset
210 return -1;
5693bddad736 Compile even if SCM_RIGHTS isn't supported.
Timo Sirainen <tss@iki.fi>
parents: 1426
diff changeset
211 }
5693bddad736 Compile even if SCM_RIGHTS isn't supported.
Timo Sirainen <tss@iki.fi>
parents: 1426
diff changeset
212 #endif