diff options
author | Joel Sherrill <joel@rtems.org> | 2016-12-05 21:06:40 -0600 |
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committer | Joel Sherrill <joel@rtems.org> | 2017-01-11 09:45:32 -0600 |
commit | ef362818dff3e7dc437d90133424e9c9f0608a02 (patch) | |
tree | c6800ad8c9bcd8d9a894c48ea533c38d9eb3a962 /cpukit/libcsupport | |
parent | posix: Fix alarm() in SMP configurations (diff) | |
download | rtems-ef362818dff3e7dc437d90133424e9c9f0608a02.tar.bz2 |
Add support for posix_devctl()
Diffstat (limited to 'cpukit/libcsupport')
-rw-r--r-- | cpukit/libcsupport/Makefile.am | 3 | ||||
-rw-r--r-- | cpukit/libcsupport/src/posix_devctl.c | 72 |
2 files changed, 74 insertions, 1 deletions
diff --git a/cpukit/libcsupport/Makefile.am b/cpukit/libcsupport/Makefile.am index bf78fa0c65..559ad81446 100644 --- a/cpukit/libcsupport/Makefile.am +++ b/cpukit/libcsupport/Makefile.am @@ -138,7 +138,8 @@ libcsupport_a_SOURCES += src/printertask.c libcsupport_a_SOURCES += $(LIBC_GLUE_C_FILES) $(PASSWORD_GROUP_C_FILES) \ $(TERMINAL_IDENTIFICATION_C_FILES) $(SYSTEM_CALL_C_FILES) \ $(DIRECTORY_SCAN_C_FILES) $(ID_C_FILES) src/envlock.c \ - $(TERMIOS_C_FILES) src/getpagesize.c src/getrusage.c + $(TERMIOS_C_FILES) src/getpagesize.c src/getrusage.c src/posix_devctl.c + libcsupport_a_SOURCES += src/flockfile.c src/funlockfile.c src/ftrylockfile.c diff --git a/cpukit/libcsupport/src/posix_devctl.c b/cpukit/libcsupport/src/posix_devctl.c new file mode 100644 index 0000000000..9b86e0e059 --- /dev/null +++ b/cpukit/libcsupport/src/posix_devctl.c @@ -0,0 +1,72 @@ +/* + * Copyright (c) 2016 Joel Sherrill <joel@rtems.org>. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#define _POSIX_26_C_SOURCE + +#include <devctl.h> +#include <sys/ioctl.h> +#include <rtems/seterr.h> + +int posix_devctl( + int fd, + int dcmd, + void *restrict dev_data_ptr, + size_t nbyte, + int *restrict dev_info_ptr +) +{ + /* + * The POSIX 1003.26 standard allows for library implementations + * that implement posix_devctl() using ioctl(). In this case, + * the extra parameters are largely ignored. + * + * The FACE Technical Standard requires only that FIONBIO + * be supported for sockets. + * + * This method appears to be rarely implemented and there are + * no known required use cases for this method beyond those + * from the FACE Technical Standard. + */ + + /* + * POSIX 1003.26 mentions that nbyte must be non-negative but this + * doesn't make sense because size_t is guaranteed to be unsigned. + */ + + /* + * Since this is implemented on top of ioctl(), the device information + * is not going to be passed down. Fill it in with zero so the behavior + * is defined. + */ + if (dev_info_ptr != NULL) { + *dev_info_ptr = 0; + } + + return ioctl(fd, dcmd, dev_data_ptr); +} |