Mercurial > hg > octave-jordi > gnulib-hg
annotate lib/nonblocking.c @ 18029:e4a13d95b503
mgetgroups: port to strict OS X
* doc/glibc-functions/getgrouplist.texi (getgrouplist):
Document the getgrouplist problem.
* lib/mgetgroups.c (getgrouplist_gids) [HAVE_GETGROUPLIST]:
New macro.
(mgetgroups): Use it.
* m4/mgetgroups.m4 (gl_MGETGROUPS):
Check for OS X signature for getgrouplist.
| author | Paul Eggert <eggert@cs.ucla.edu> |
|---|---|
| date | Sun, 28 Jun 2015 23:43:35 -0700 |
| parents | ab58d4870664 |
| children |
| rev | line source |
|---|---|
| 14513 | 1 /* Non-blocking I/O for pipe or socket descriptors. |
| 17848 | 2 Copyright (C) 2011-2015 Free Software Foundation, Inc. |
| 14513 | 3 |
| 4 This program is free software: you can redistribute it and/or modify | |
| 5 it under the terms of the GNU General Public License as published by | |
| 6 the Free Software Foundation; either version 3 of the License, or | |
| 7 (at your option) any later version. | |
| 8 | |
| 9 This program is distributed in the hope that it will be useful, | |
| 10 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 GNU General Public License for more details. | |
| 13 | |
| 14 You should have received a copy of the GNU General Public License | |
| 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
| 16 | |
| 17 #include <config.h> | |
| 18 | |
| 19 /* Specification. */ | |
| 20 #include "nonblocking.h" | |
| 21 | |
| 22 #include <errno.h> | |
| 23 | |
| 24 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ | |
|
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Talk about "native Windows API", not "Win32".
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25 /* Native Windows API. */ |
| 14513 | 26 |
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27 # include <sys/ioctl.h> |
| 14513 | 28 # include <sys/socket.h> |
| 29 # include <unistd.h> | |
| 30 | |
|
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Talk about "native Windows API", not "Win32".
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parents:
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31 /* Get declarations of the native Windows API functions. */ |
| 14513 | 32 # define WIN32_LEAN_AND_MEAN |
| 33 # include <windows.h> | |
| 34 | |
|
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New module 'msvc-nothrow'. Makes _get_osfhandle safe on MSVC 9.
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35 # include "msvc-nothrow.h" |
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b86e9061a6d0
New module 'msvc-nothrow'. Makes _get_osfhandle safe on MSVC 9.
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36 |
| 14513 | 37 int |
| 38 get_nonblocking_flag (int desc) | |
| 39 { | |
| 40 HANDLE h = (HANDLE) _get_osfhandle (desc); | |
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41 if (h == INVALID_HANDLE_VALUE) |
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42 { |
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43 errno = EBADF; |
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44 return -1; |
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45 } |
| 14513 | 46 if (GetFileType (h) == FILE_TYPE_PIPE) |
| 47 { | |
| 48 /* h is a pipe or socket. */ | |
| 49 DWORD state; | |
| 50 if (GetNamedPipeHandleState (h, &state, NULL, NULL, NULL, NULL, 0)) | |
| 51 /* h is a pipe. */ | |
| 52 return (state & PIPE_NOWAIT) != 0; | |
| 53 else | |
| 54 /* h is a socket. */ | |
| 55 errno = ENOSYS; | |
| 56 return -1; | |
| 57 } | |
| 58 else | |
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Talk about "native Windows API", not "Win32".
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parents:
16201
diff
changeset
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59 /* The native Windows API does not support non-blocking on regular |
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ec738d6aeef5
Talk about "native Windows API", not "Win32".
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parents:
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diff
changeset
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60 files. */ |
| 14513 | 61 return 0; |
| 62 } | |
| 63 | |
| 64 int | |
| 65 set_nonblocking_flag (int desc, bool value) | |
| 66 { | |
| 67 HANDLE h = (HANDLE) _get_osfhandle (desc); | |
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68 if (h == INVALID_HANDLE_VALUE) |
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69 { |
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70 errno = EBADF; |
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71 return -1; |
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72 } |
| 14513 | 73 if (GetFileType (h) == FILE_TYPE_PIPE) |
| 74 { | |
| 75 /* h is a pipe or socket. */ | |
| 76 DWORD state; | |
| 77 if (GetNamedPipeHandleState (h, &state, NULL, NULL, NULL, NULL, 0)) | |
| 78 { | |
| 79 /* h is a pipe. */ | |
| 80 if ((state & PIPE_NOWAIT) != 0) | |
| 81 { | |
| 82 if (value) | |
| 83 return 0; | |
| 84 state &= ~PIPE_NOWAIT; | |
| 85 } | |
| 86 else | |
| 87 { | |
| 88 if (!value) | |
| 89 return 0; | |
| 90 state |= PIPE_NOWAIT; | |
| 91 } | |
| 92 if (SetNamedPipeHandleState (h, &state, NULL, NULL)) | |
| 93 return 0; | |
| 94 errno = EINVAL; | |
| 95 return -1; | |
| 96 } | |
| 97 else | |
| 98 { | |
| 99 /* h is a socket. */ | |
| 100 int v = value; | |
| 101 return ioctl (desc, FIONBIO, &v); | |
| 102 } | |
| 103 } | |
| 104 else | |
| 105 { | |
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Talk about "native Windows API", not "Win32".
Bruno Haible <bruno@clisp.org>
parents:
16201
diff
changeset
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106 /* The native Windows API does not support non-blocking on regular |
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ec738d6aeef5
Talk about "native Windows API", not "Win32".
Bruno Haible <bruno@clisp.org>
parents:
16201
diff
changeset
|
107 files. */ |
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108 if (!value) |
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109 return 0; |
| 14513 | 110 errno = ENOTSUP; |
| 111 return -1; | |
| 112 } | |
| 113 } | |
| 114 | |
| 115 #else | |
| 116 /* Unix API. */ | |
| 117 | |
| 118 # include <fcntl.h> | |
| 119 | |
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nonblocking: provide O_NONBLOCK for mingw
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120 # if GNULIB_defined_O_NONBLOCK |
| 14513 | 121 # error Please port nonblocking to your platform |
| 122 # endif | |
| 123 | |
| 124 /* We don't need the gnulib replacement of fcntl() here. */ | |
| 125 # undef fcntl | |
| 126 | |
| 127 int | |
| 128 get_nonblocking_flag (int desc) | |
| 129 { | |
| 130 int fcntl_flags; | |
| 131 | |
| 132 fcntl_flags = fcntl (desc, F_GETFL, 0); | |
| 133 if (fcntl_flags < 0) | |
| 134 return -1; | |
| 135 return (fcntl_flags & O_NONBLOCK) != 0; | |
| 136 } | |
| 137 | |
| 138 int | |
| 139 set_nonblocking_flag (int desc, bool value) | |
| 140 { | |
| 141 int fcntl_flags; | |
| 142 | |
| 143 fcntl_flags = fcntl (desc, F_GETFL, 0); | |
| 144 if (fcntl_flags < 0) | |
| 145 return -1; | |
| 146 if (((fcntl_flags & O_NONBLOCK) != 0) == value) | |
| 147 return 0; | |
| 148 if (value) | |
| 149 fcntl_flags |= O_NONBLOCK; | |
| 150 else | |
| 151 fcntl_flags &= ~O_NONBLOCK; | |
| 152 return fcntl (desc, F_SETFL, fcntl_flags); | |
| 153 } | |
| 154 | |
| 155 #endif |