summaryrefslogtreecommitdiffstats
path: root/gl/freading.c
diff options
context:
space:
mode:
authorLorenz <12514511+RincewindsHat@users.noreply.github.com>2023-02-10 10:43:20 (GMT)
committerGitHub <noreply@github.com>2023-02-10 10:43:20 (GMT)
commitc07206f2ccc2356aa74bc6813a94c2190017d44e (patch)
tree1677e5fdca5c3ce544e92c5484e16a0b68df1cc9 /gl/freading.c
parente92046f810658016b7c373677efefda3b21400e4 (diff)
parentd2fcf49ad4afc15f37d082d7bc96a808369ec2d4 (diff)
downloadmonitoring-plugins-c07206f2ccc2356aa74bc6813a94c2190017d44e.tar.gz
Merge pull request #1832 from RincewindsHat/gnulib_update_2023
Gnulib update 2023 and attendant fixes
Diffstat (limited to 'gl/freading.c')
-rw-r--r--gl/freading.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/gl/freading.c b/gl/freading.c
new file mode 100644
index 0000000..b9377cb
--- /dev/null
+++ b/gl/freading.c
@@ -0,0 +1,76 @@
1/* Retrieve information about a FILE stream.
2 Copyright (C) 2007-2023 Free Software Foundation, Inc.
3
4 This file is free software: you can redistribute it and/or modify
5 it under the terms of the GNU Lesser General Public License as
6 published by the Free Software Foundation; either version 2.1 of the
7 License, or (at your option) any later version.
8
9 This file 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 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
16
17#include <config.h>
18
19/* Specification. */
20#include "freading.h"
21
22#include "stdio-impl.h"
23
24/* Don't use glibc's __freading function in glibc < 2.7, see
25 <https://sourceware.org/bugzilla/show_bug.cgi?id=4359> */
26#if !(HAVE___FREADING && (!defined __GLIBC__ || defined __UCLIBC__ || __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)))
27
28bool
29freading (FILE *fp)
30{
31 /* Most systems provide FILE as a struct and the necessary bitmask in
32 <stdio.h>, because they need it for implementing getc() and putc() as
33 fast macros. */
34# if defined _IO_EOF_SEEN || defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1
35 /* GNU libc, BeOS, Haiku, Linux libc5 */
36 return ((fp->_flags & _IO_NO_WRITES) != 0
37 || ((fp->_flags & (_IO_NO_READS | _IO_CURRENTLY_PUTTING)) == 0
38 && fp->_IO_read_base != NULL));
39# elif defined __sferror || defined __DragonFly__ || defined __ANDROID__
40 /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin < 1.7.34, Minix 3, Android */
41 return (fp_->_flags & __SRD) != 0;
42# elif defined __EMX__ /* emx+gcc */
43 return (fp->_flags & _IOREAD) != 0;
44# elif defined __minix /* Minix */
45 return (fp->_flags & _IOREADING) != 0;
46# elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, UnixWare, mingw, MSVC, NonStop Kernel, OpenVMS */
47# if defined __sun /* Solaris */
48 return (fp_->_flag & _IOREAD) != 0 && (fp_->_flag & _IOWRT) == 0;
49# else
50 return (fp_->_flag & _IOREAD) != 0;
51# endif
52# elif defined __UCLIBC__ /* uClibc */
53 return (fp->__modeflags & (__FLAG_READONLY | __FLAG_READING)) != 0;
54# elif defined __QNX__ /* QNX */
55 return ((fp->_Mode & 0x2 /* _MOPENW */) == 0
56 || (fp->_Mode & 0x1000 /* _MREAD */) != 0);
57# elif defined __MINT__ /* Atari FreeMiNT */
58 if (!fp->__mode.__write)
59 return 1;
60 if (!fp->__mode.__read)
61 return 0;
62# ifdef _IO_CURRENTLY_GETTING /* Flag added on 2009-02-28 */
63 return (fp->__flags & _IO_CURRENTLY_GETTING) != 0;
64# else
65 return (fp->__buffer < fp->__get_limit /*|| fp->__bufp == fp->__put_limit ??*/);
66# endif
67# elif defined EPLAN9 /* Plan9 */
68 if (fp->state == 0 /* CLOSED */ || fp->state == 4 /* WR */)
69 return 0;
70 return (fp->state == 3 /* RD */ && (fp->bufl == 0 || fp->rp < fp->wp));
71# else
72# error "Please port gnulib freading.c to your platform!"
73# endif
74}
75
76#endif