Mercurial > dovecot > original-hg > dovecot-1.2
annotate src/lib/fdpass.c @ 870:971947c0034f HEAD
Fixed to work with 64bit BSD systems.
| author | Timo Sirainen <tss@iki.fi> |
|---|---|
| date | Sat, 28 Dec 2002 21:20:37 +0200 |
| parents | 7c91f579ebed |
| children | 28212c00d147 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 28 | 2 fdpass.c - FD passing |
| 0 | 3 |
| 4 Copyright (c) 2002 Timo Sirainen | |
| 5 | |
| 6 Permission is hereby granted, free of charge, to any person obtaining | |
| 7 a copy of this software and associated documentation files (the | |
| 8 "Software"), to deal in the Software without restriction, including | |
| 9 without limitation the rights to use, copy, modify, merge, publish, | |
| 10 distribute, sublicense, and/or sell copies of the Software, and to | |
| 11 permit persons to whom the Software is furnished to do so, subject to | |
| 12 the following conditions: | |
| 13 | |
| 14 The above copyright notice and this permission notice shall be | |
| 15 included in all copies or substantial portions of the Software. | |
| 16 | |
| 17 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
| 18 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
| 19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
| 20 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY | |
| 21 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, | |
| 22 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE | |
| 23 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
| 24 */ | |
| 25 | |
| 350 | 26 #define _XPG4_2 |
| 0 | 27 |
| 28 #include "lib.h" | |
| 29 #include "fdpass.h" | |
| 30 | |
|
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include sys/socket.h, not network.h. Required with solaris+ipv6 where
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31 #include <sys/socket.h> |
| 0 | 32 #include <sys/un.h> |
| 33 #include <sys/uio.h> | |
| 34 | |
|
345
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Define CMSG_SPACE always if it's undefined, not only if __sun__ is defined.
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35 #ifndef CMSG_SPACE |
| 0 | 36 # define CMSG_ALIGN(len) \ |
| 37 (((len) + sizeof(size_t) - 1) & ~(sizeof(size_t) - 1)) | |
| 38 # define CMSG_SPACE(len) \ | |
| 39 (CMSG_ALIGN(len) + CMSG_ALIGN(sizeof(struct cmsghdr))) | |
| 40 # define CMSG_LEN(len) \ | |
| 41 (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len)) | |
| 42 #endif | |
| 43 | |
|
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44 ssize_t fd_send(int handle, int send_fd, const void *data, size_t size) |
| 0 | 45 { |
| 46 struct msghdr msg; | |
| 47 struct iovec iov; | |
| 48 struct cmsghdr *cmsg; | |
|
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49 char buf[CMSG_SPACE(sizeof(int))]; |
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50 |
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51 i_assert(size > 0 && size < SSIZE_T_MAX); |
| 0 | 52 |
| 53 memset(&msg, 0, sizeof (struct msghdr)); | |
| 54 | |
| 55 iov.iov_base = (void *) data; | |
| 56 iov.iov_len = size; | |
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57 |
| 0 | 58 msg.msg_iov = &iov; |
| 59 msg.msg_iovlen = 1; | |
| 60 | |
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61 if (send_fd != -1) { |
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62 msg.msg_control = buf; |
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63 msg.msg_controllen = sizeof(buf); |
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64 |
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65 cmsg = CMSG_FIRSTHDR(&msg); |
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66 cmsg->cmsg_level = SOL_SOCKET; |
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67 cmsg->cmsg_type = SCM_RIGHTS; |
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68 cmsg->cmsg_len = CMSG_LEN(sizeof(int)); |
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69 *((int *) CMSG_DATA(cmsg)) = send_fd; |
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70 |
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71 msg.msg_controllen = cmsg->cmsg_len; |
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72 } |
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73 |
| 0 | 74 return sendmsg(handle, &msg, 0); |
| 75 } | |
| 76 | |
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77 ssize_t fd_read(int handle, void *data, size_t size, int *fd) |
| 0 | 78 { |
| 79 struct msghdr msg; | |
| 80 struct iovec iov; | |
| 81 struct cmsghdr *cmsg; | |
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82 ssize_t ret; |
| 0 | 83 char buf[CMSG_SPACE(sizeof(int))]; |
| 84 | |
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85 i_assert(size > 0 && size < SSIZE_T_MAX); |
|
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86 |
| 0 | 87 memset(&msg, 0, sizeof (struct msghdr)); |
| 88 | |
| 89 msg.msg_control = buf; | |
| 90 msg.msg_controllen = sizeof(buf); | |
| 91 msg.msg_iov = &iov; | |
| 92 msg.msg_iovlen = 1; | |
| 93 cmsg = CMSG_FIRSTHDR(&msg); | |
| 94 cmsg->cmsg_level = SOL_SOCKET; | |
| 95 cmsg->cmsg_type = SCM_RIGHTS; | |
| 107 | 96 iov.iov_base = data; |
| 0 | 97 iov.iov_len = size; |
| 98 | |
| 99 ret = recvmsg(handle, &msg, 0); | |
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100 if (msg.msg_controllen != sizeof(buf)) |
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101 *fd = -1; |
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102 else |
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103 *fd = *(int *) CMSG_DATA(cmsg); |
| 0 | 104 return ret; |
| 105 } |