Mercurial > hg > octave-kai > gnulib-hg
annotate tests/test-dup3.c @ 14350:4cf3b58aaf12
Don't interfere with a program's definition of __attribute__.
* lib/argp.h (__attribute__): Remove definition.
(_GL_ATTRIBUTE_FORMAT): New macro.
(argp_error, __argp_error, argp_failure, __argp_failure): Use it.
* lib/argp-fmtstream.h (__attribute__): Remove definition.
(_GL_ATTRIBUTE_FORMAT): New macro.
(__argp_fmtstream_printf, argp_fmtstream_printf): Use it.
* lib/argp-help.c (hol_entry_long_iterate): Use __attribute__ only for
GCC 3 or newer.
* lib/error.h (__attribute__): Remove definition.
(_GL_ATTRIBUTE_FORMAT): New macro.
(error, error_at_line): Use it.
* lib/hash.h (__attribute__): Remove definition.
(ATTRIBUTE_WUR): Update definition. Define always.
* lib/openat.h (__attribute__): Remove definition.
(ATTRIBUTE_NORETURN): Update definition. Define always.
* lib/sigpipe-die.h (__attribute__): Remove definition.
(ATTRIBUTE_NORETURN): Update definition. Define always.
* lib/vasnprintf.h (__attribute__): Remove definition.
(_GL_ATTRIBUTE_FORMAT): New macro.
(asnprintf, vasnprintf): Use it.
* lib/xalloc.h (__attribute__): Remove definition.
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* lib/xmemdup0.h (__attribute__): Remove definition.
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Reported by Paul Eggert.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Sun, 13 Feb 2011 23:21:20 +0100 |
| parents | 97fc9a21a8fb |
| children | b86e9061a6d0 |
| rev | line source |
|---|---|
| 11887 | 1 /* Test duplicating file descriptors. |
|
14079
97fc9a21a8fb
maint: update almost all copyright ranges to include 2011
Jim Meyering <meyering@redhat.com>
parents:
13664
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changeset
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2 Copyright (C) 2009-2011 Free Software Foundation, Inc. |
| 11887 | 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 /* Written by Eric Blake <ebb9@byu.net>, 2009, | |
| 18 and Bruno Haible <bruno@clisp.org>, 2009. */ | |
| 19 | |
| 20 #include <config.h> | |
| 21 | |
| 22 #include <unistd.h> | |
| 23 | |
| 12489 | 24 #include "signature.h" |
| 25 SIGNATURE_CHECK (dup3, int, (int, int, int)); | |
| 26 | |
| 11887 | 27 #include <errno.h> |
| 28 #include <fcntl.h> | |
| 29 #include <stdbool.h> | |
| 30 | |
| 31 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ | |
| 32 /* Get declarations of the Win32 API functions. */ | |
| 33 # define WIN32_LEAN_AND_MEAN | |
| 34 # include <windows.h> | |
| 35 #endif | |
| 36 | |
| 37 #include "binary-io.h" | |
|
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Refactor common macros used in tests.
Bruno Haible <bruno@clisp.org>
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38 #include "macros.h" |
| 11887 | 39 |
| 40 /* Return true if FD is open. */ | |
| 41 static bool | |
| 42 is_open (int fd) | |
| 43 { | |
| 44 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ | |
| 45 /* On Win32, the initial state of unassigned standard file | |
| 46 descriptors is that they are open but point to an | |
| 47 INVALID_HANDLE_VALUE, and there is no fcntl. */ | |
| 48 return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE; | |
| 49 #else | |
| 50 # ifndef F_GETFL | |
| 51 # error Please port fcntl to your platform | |
| 52 # endif | |
| 53 return 0 <= fcntl (fd, F_GETFL); | |
| 54 #endif | |
| 55 } | |
| 56 | |
| 57 /* Return true if FD is not inherited to child processes. */ | |
| 58 static bool | |
| 59 is_cloexec (int fd) | |
| 60 { | |
| 61 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ | |
| 62 HANDLE h = (HANDLE) _get_osfhandle (fd); | |
| 63 DWORD flags; | |
| 64 ASSERT (GetHandleInformation (h, &flags)); | |
| 65 return (flags & HANDLE_FLAG_INHERIT) == 0; | |
| 66 #else | |
| 67 int flags; | |
| 68 ASSERT ((flags = fcntl (fd, F_GETFD)) >= 0); | |
| 69 return (flags & FD_CLOEXEC) != 0; | |
| 70 #endif | |
| 71 } | |
| 72 | |
| 73 int | |
| 74 main () | |
| 75 { | |
| 76 int use_cloexec; | |
| 77 | |
|
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fcntl-h: define O_CLOEXEC and O_EXEC if not defined; use new defines
Paul Eggert <eggert@cs.ucla.edu>
parents:
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changeset
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78 #if O_CLOEXEC |
| 11887 | 79 for (use_cloexec = 0; use_cloexec <= 1; use_cloexec++) |
| 80 #else | |
| 81 use_cloexec = 0; | |
| 82 #endif | |
| 83 { | |
| 84 const char *file = "test-dup3.tmp"; | |
| 85 int fd = open (file, O_CREAT | O_TRUNC | O_RDWR, 0600); | |
| 86 int o_flags; | |
| 87 char buffer[1]; | |
| 88 | |
| 89 o_flags = 0; | |
|
13664
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fcntl-h: define O_CLOEXEC and O_EXEC if not defined; use new defines
Paul Eggert <eggert@cs.ucla.edu>
parents:
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diff
changeset
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90 #if O_CLOEXEC |
| 11887 | 91 if (use_cloexec) |
|
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
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92 o_flags |= O_CLOEXEC; |
| 11887 | 93 #endif |
| 94 | |
| 95 /* Assume std descriptors were provided by invoker. */ | |
| 96 ASSERT (STDERR_FILENO < fd); | |
| 97 ASSERT (is_open (fd)); | |
| 98 /* Ignore any other fd's leaked into this process. */ | |
| 99 close (fd + 1); | |
| 100 close (fd + 2); | |
| 101 ASSERT (!is_open (fd + 1)); | |
| 102 ASSERT (!is_open (fd + 2)); | |
| 103 | |
| 104 /* Assigning to self is invalid. */ | |
| 105 errno = 0; | |
| 106 ASSERT (dup3 (fd, fd, o_flags) == -1); | |
| 107 ASSERT (errno == EINVAL); | |
| 108 ASSERT (is_open (fd)); | |
| 109 | |
| 110 /* If the source is not open, then the destination is unaffected. */ | |
| 111 errno = 0; | |
| 112 ASSERT (dup3 (fd + 1, fd + 2, o_flags) == -1); | |
| 113 ASSERT (errno == EBADF); | |
| 114 ASSERT (!is_open (fd + 2)); | |
| 115 errno = 0; | |
| 116 ASSERT (dup3 (fd + 1, fd, o_flags) == -1); | |
| 117 ASSERT (errno == EBADF); | |
| 118 ASSERT (is_open (fd)); | |
| 119 | |
| 120 /* The destination must be valid. */ | |
| 121 errno = 0; | |
| 122 ASSERT (dup3 (fd, -2, o_flags) == -1); | |
| 123 ASSERT (errno == EBADF); | |
| 124 errno = 0; | |
| 125 ASSERT (dup3 (fd, 10000000, o_flags) == -1); | |
| 126 ASSERT (errno == EBADF); | |
| 127 | |
| 128 /* Using dup3 can skip fds. */ | |
| 129 ASSERT (dup3 (fd, fd + 2, o_flags) == fd + 2); | |
| 130 ASSERT (is_open (fd)); | |
| 131 ASSERT (!is_open (fd + 1)); | |
| 132 ASSERT (is_open (fd + 2)); | |
| 133 if (use_cloexec) | |
|
12421
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
11887
diff
changeset
|
134 ASSERT (is_cloexec (fd + 2)); |
| 11887 | 135 else |
|
12421
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Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents:
11887
diff
changeset
|
136 ASSERT (!is_cloexec (fd + 2)); |
| 11887 | 137 |
| 138 /* Verify that dup3 closes the previous occupant of a fd. */ | |
| 139 ASSERT (open ("/dev/null", O_WRONLY, 0600) == fd + 1); | |
| 140 ASSERT (dup3 (fd + 1, fd, o_flags) == fd); | |
| 141 ASSERT (close (fd + 1) == 0); | |
| 142 ASSERT (write (fd, "1", 1) == 1); | |
| 143 ASSERT (dup3 (fd + 2, fd, o_flags) == fd); | |
| 144 ASSERT (lseek (fd, 0, SEEK_END) == 0); | |
| 145 ASSERT (write (fd + 2, "2", 1) == 1); | |
| 146 ASSERT (lseek (fd, 0, SEEK_SET) == 0); | |
| 147 ASSERT (read (fd, buffer, 1) == 1); | |
| 148 ASSERT (*buffer == '2'); | |
| 149 | |
| 150 /* Clean up. */ | |
| 151 ASSERT (close (fd + 2) == 0); | |
| 152 ASSERT (close (fd) == 0); | |
| 153 ASSERT (unlink (file) == 0); | |
| 154 } | |
| 155 | |
| 156 return 0; | |
| 157 } |