Add eventfd(3) wrappers to libc.
eventfd_read/write one-liners are from musl libc. Submitted by: greg@unrelenting.technology Reviewed by: markj (previous version) MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D26668
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@ -47,6 +47,7 @@ SRCS+= __getosreldate.c \
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err.c \
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err.c \
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errlst.c \
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errlst.c \
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errno.c \
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errno.c \
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eventfd.c \
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exec.c \
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exec.c \
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exect.c \
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exect.c \
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fdevname.c \
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fdevname.c \
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@ -422,6 +422,9 @@ FBSD_1.5 {
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};
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};
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FBSD_1.6 {
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FBSD_1.6 {
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eventfd;
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eventfd_read;
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eventfd_write;
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getlogin_r;
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getlogin_r;
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memalign;
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memalign;
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scandir_b;
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scandir_b;
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54
lib/libc/gen/eventfd.c
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54
lib/libc/gen/eventfd.c
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@ -0,0 +1,54 @@
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/*-
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* SPDX-License-Identifier: MIT
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*
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* Copyright (c) 2005-2020 Rich Felker, et al.
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* Copyright (c) 2020 Greg V
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include <sys/eventfd.h>
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#include <sys/specialfd.h>
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#include <unistd.h>
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#include "un-namespace.h"
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#include "libc_private.h"
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int eventfd(unsigned int initval, int flags)
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{
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struct specialfd_eventfd args;
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args.initval = initval;
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args.flags = flags;
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return (__sys___specialfd(SPECIALFD_EVENTFD, &args, sizeof(args)));
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}
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int eventfd_read(int fd, eventfd_t *value)
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{
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return (sizeof(*value) == _read(fd, value, sizeof(*value)) ? 0 : -1);
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}
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int eventfd_write(int fd, eventfd_t value)
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{
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return (sizeof(value) == _write(fd, &value, sizeof(value)) ? 0 : -1);
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}
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@ -382,6 +382,7 @@ int __sys_sigtimedwait(const __sigset_t *, struct __siginfo *,
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const struct timespec *);
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const struct timespec *);
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int __sys_sigwait(const __sigset_t *, int *);
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int __sys_sigwait(const __sigset_t *, int *);
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int __sys_sigwaitinfo(const __sigset_t *, struct __siginfo *);
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int __sys_sigwaitinfo(const __sigset_t *, struct __siginfo *);
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int __sys___specialfd(int, const void *, __size_t);
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int __sys_statfs(const char *, struct statfs *);
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int __sys_statfs(const char *, struct statfs *);
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int __sys_swapcontext(struct __ucontext *,
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int __sys_swapcontext(struct __ucontext *,
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const struct __ucontext *);
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const struct __ucontext *);
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@ -178,6 +178,7 @@ MAN+= abort2.2 \
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cpuset_getaffinity.2 \
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cpuset_getaffinity.2 \
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cpuset_getdomain.2 \
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cpuset_getdomain.2 \
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dup.2 \
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dup.2 \
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eventfd.2 \
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execve.2 \
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execve.2 \
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_exit.2 \
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_exit.2 \
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extattr_get_file.2 \
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extattr_get_file.2 \
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@ -379,6 +380,8 @@ MLINKS+=cpuset.2 cpuset_getid.2 \
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MLINKS+=cpuset_getaffinity.2 cpuset_setaffinity.2
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MLINKS+=cpuset_getaffinity.2 cpuset_setaffinity.2
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MLINKS+=cpuset_getdomain.2 cpuset_setdomain.2
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MLINKS+=cpuset_getdomain.2 cpuset_setdomain.2
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MLINKS+=dup.2 dup2.2
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MLINKS+=dup.2 dup2.2
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MLINKS+=eventfd.2 eventfd_read.3 \
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eventfd.2 eventfd_write.3
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MLINKS+=execve.2 fexecve.2
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MLINKS+=execve.2 fexecve.2
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MLINKS+=extattr_get_file.2 extattr.2 \
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MLINKS+=extattr_get_file.2 extattr.2 \
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extattr_get_file.2 extattr_delete_fd.2 \
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extattr_get_file.2 extattr_delete_fd.2 \
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