Mercurial > hg > octave-nkf > gnulib-hg

annotate lib/careadlinkat.h @ 16040:b8acd8099b25

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
New module 'fmaf'. * lib/math.in.h (fmaf): New declaration. * lib/fmaf.c: New file. * m4/fmaf.m4: New file. * m4/math_h.m4 (gl_MATH_H): Test whethern fmaf is declared. (gl_MATH_H_DEFAULTS): Initialize GNULIB_FMAF, HAVE_FMAF, REPLACE_FMAF. * modules/math (Makefile.am): Substitute GNULIB_FMAF, HAVE_FMAF, REPLACE_FMAF. * modules/fmaf: New file. * doc/posix-functions/fmaf.texi: Mention the new module and the various bugs.
author Bruno Haible <bruno@clisp.org>
date Mon, 17 Oct 2011 23:51:21 +0200
parents 344b70fb76a2
children 8250f2777afc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
14522
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
1 /* Read symbolic links into a buffer without size limitation, relative to fd.
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
2
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
3 Copyright (C) 2011 Free Software Foundation, Inc.
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
4
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
5 This program is free software: you can redistribute it and/or modify
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
6 it under the terms of the GNU General Public License as published by
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
7 the Free Software Foundation; either version 3 of the License, or
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
8 (at your option) any later version.
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
9
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
10 This program is distributed in the hope that it will be useful,
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
13 GNU General Public License for more details.
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
14
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
15 You should have received a copy of the GNU General Public License
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
17
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
18 /* Written by Paul Eggert, Bruno Haible, and Jim Meyering. */
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
19
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
20 #ifndef _GL_CAREADLINKAT_H
14555
68b42f132c0c allocator, careadlinkat: Fix double-inclusion guard.
Bruno Haible <bruno@clisp.org>
parents: 14522
diff changeset
21 #define _GL_CAREADLINKAT_H
14522
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
22
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
23 #include <fcntl.h>
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
24 #include <unistd.h>
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
25
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
26 struct allocator;
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
27
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
28 /* Assuming the current directory is FD, get the symbolic link value
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
29 of FILENAME as a null-terminated string and put it into a buffer.
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
30 If FD is AT_FDCWD, FILENAME is interpreted relative to the current
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
31 working directory, as in openat.
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
32
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
33 If the link is small enough to fit into BUFFER put it there.
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
34 BUFFER's size is BUFFER_SIZE, and BUFFER can be null
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
35 if BUFFER_SIZE is zero.
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
36
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
37 If the link is not small, put it into a dynamically allocated
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
38 buffer managed by ALLOC. It is the caller's responsibility to free
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
39 the returned value if it is nonnull and is not BUFFER.
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
40
14557
1d2daac9948e careadlinkat: Clarify specification.
Bruno Haible <bruno@clisp.org>
parents: 14555
diff changeset
41 The PREADLINKAT function specifies how to read links. It operates
1d2daac9948e careadlinkat: Clarify specification.
Bruno Haible <bruno@clisp.org>
parents: 14555
diff changeset
42 like POSIX readlinkat()
1d2daac9948e careadlinkat: Clarify specification.
Bruno Haible <bruno@clisp.org>
parents: 14555
diff changeset
43 <http://pubs.opengroup.org/onlinepubs/9699919799/functions/readlink.html>
1d2daac9948e careadlinkat: Clarify specification.
Bruno Haible <bruno@clisp.org>
parents: 14555
diff changeset
44 but can assume that its first argument is the same as FD.
14522
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
45
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
46 If successful, return the buffer address; otherwise return NULL and
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
47 set errno. */
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
48
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
49 char *careadlinkat (int fd, char const *filename,
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
50 char *buffer, size_t buffer_size,
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
51 struct allocator const *alloc,
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
52 ssize_t (*preadlinkat) (int, char const *,
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
53 char *, size_t));
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
54
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
55 /* Suitable values for careadlinkat's FD and PREADLINKAT arguments,
14557
1d2daac9948e careadlinkat: Clarify specification.
Bruno Haible <bruno@clisp.org>
parents: 14555
diff changeset
56 when doing a plain readlink:
1d2daac9948e careadlinkat: Clarify specification.
Bruno Haible <bruno@clisp.org>
parents: 14555
diff changeset
57 Pass FD = AT_FDCWD and PREADLINKAT = careadlinkatcwd. */
14522
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
58 #if HAVE_READLINKAT
14874
344b70fb76a2 careadlinkat: Avoid mismatch between ssize_t and int.
Bruno Haible <bruno@clisp.org>
parents: 14557
diff changeset
59 /* AT_FDCWD is declared in <fcntl.h>. */
14522
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
60 #else
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
61 /* Define AT_FDCWD independently, so that the careadlinkat module does
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
62 not depend on the fcntl-h module. The value does not matter, since
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
63 careadlinkatcwd ignores it, but we might as well use the same value
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
64 as fcntl-h. */
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
65 # ifndef AT_FDCWD
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
66 # define AT_FDCWD (-3041965)
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
67 # endif
14874
344b70fb76a2 careadlinkat: Avoid mismatch between ssize_t and int.
Bruno Haible <bruno@clisp.org>
parents: 14557
diff changeset
68 #endif
14522
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
69 ssize_t careadlinkatcwd (int fd, char const *filename,
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
70 char *buffer, size_t buffer_size);
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
71
39a9dbe4bfe3 areadlink, areadlinkat: rewrite in terms of careadlinkat
Paul Eggert <eggert@cs.ucla.edu>
parents:
diff changeset
72 #endif /* _GL_CAREADLINKAT_H */