Absolute File Name: | /home/opencoverage/opencoverage/guest-scripts/coreutils/src/gnulib/lib/fseterr.c |
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1 | /* Set the error indicator of a stream. | - |
2 | Copyright (C) 2007-2018 Free Software Foundation, Inc. | - |
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 <https://www.gnu.org/licenses/>. */ | - |
16 | - | |
17 | #include <config.h> | - |
18 | - | |
19 | /* Specification. */ | - |
20 | #include "fseterr.h" | - |
21 | - | |
22 | #include <errno.h> | - |
23 | - | |
24 | #include "stdio-impl.h" | - |
25 | - | |
26 | void | - |
27 | fseterr (FILE *fp) | - |
28 | { | - |
29 | /* Most systems provide FILE as a struct and the necessary bitmask in | - |
30 | <stdio.h>, because they need it for implementing getc() and putc() as | - |
31 | fast macros. */ | - |
32 | #if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */ | - |
33 | fp->_flags |= _IO_ERR_SEEN; | - |
34 | #elif defined __sferror || defined __DragonFly__ || defined __ANDROID__ | - |
35 | /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin, Minix 3, Android */ | - |
36 | fp_->_flags |= __SERR; | - |
37 | #elif defined __EMX__ /* emx+gcc */ | - |
38 | fp->_flags |= _IOERR; | - |
39 | #elif defined __minix /* Minix */ | - |
40 | fp->_flags |= _IOERR; | - |
41 | #elif defined _IOERR /* AIX, HP-UX, IRIX, OSF/1, Solaris, OpenServer, mingw, MSVC, NonStop Kernel, OpenVMS */ | - |
42 | fp_->_flag |= _IOERR; | - |
43 | #elif defined __UCLIBC__ /* uClibc */ | - |
44 | fp->__modeflags |= __FLAG_ERROR; | - |
45 | #elif defined __QNX__ /* QNX */ | - |
46 | fp->_Mode |= 0x200 /* _MERR */; | - |
47 | #elif defined __MINT__ /* Atari FreeMiNT */ | - |
48 | fp->__error = 1; | - |
49 | #elif defined EPLAN9 /* Plan9 */ | - |
50 | if (fp->state != 0 /* CLOSED */) | - |
51 | fp->state = 5 /* ERR */; | - |
52 | #elif 0 /* unknown */ | - |
53 | /* Portable fallback, based on an idea by Rich Felker. | - |
54 | Wow! 6 system calls for something that is just a bit operation! | - |
55 | Not activated on any system, because there is no way to repair FP when | - |
56 | the sequence of system calls fails, and library code should not call | - |
57 | abort(). */ | - |
58 | int saved_errno; | - |
59 | int fd; | - |
60 | int fd2; | - |
61 | - | |
62 | saved_errno = errno; | - |
63 | fflush (fp); | - |
64 | fd = fileno (fp); | - |
65 | fd2 = dup (fd); | - |
66 | if (fd2 >= 0) | - |
67 | { | - |
68 | close (fd); | - |
69 | fputc ('\0', fp); /* This should set the error indicator. */ | - |
70 | fflush (fp); /* Or this. */ | - |
71 | if (dup2 (fd2, fd) < 0) | - |
72 | /* Whee... we botched the stream and now cannot restore it! */ | - |
73 | abort (); | - |
74 | close (fd2); | - |
75 | } | - |
76 | errno = saved_errno; | - |
77 | #else | - |
78 | #error "Please port gnulib fseterr.c to your platform! Look at the definitions of ferror and clearerr on your system, then report this to bug-gnulib." | - |
79 | #endif | - |
80 | } never executed: end of block | 0 |
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