From 5af3aee3f798489f1a99f227f454e4fc3c3ceea3 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Wed, 10 Apr 2024 11:27:29 -0400 Subject: libc: Add read() Signed-off-by: Ian Moffett --- lib/libc/include/unistd.h | 1 + lib/libc/src/read.c | 37 +++++++++++++++++++++++++++++++++++++ 2 files changed, 38 insertions(+) create mode 100644 lib/libc/src/read.c diff --git a/lib/libc/include/unistd.h b/lib/libc/include/unistd.h index 8784d6b..8d92422 100644 --- a/lib/libc/include/unistd.h +++ b/lib/libc/include/unistd.h @@ -41,6 +41,7 @@ extern "C" { _Noreturn void _exit(int status); ssize_t write(int fd, const void *buf, size_t count); +ssize_t read(int fd, void *buf, size_t count); #if defined(__cplusplus) } diff --git a/lib/libc/src/read.c b/lib/libc/src/read.c new file mode 100644 index 0000000..940c0ec --- /dev/null +++ b/lib/libc/src/read.c @@ -0,0 +1,37 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * 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. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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. + */ + +#include +#include + +ssize_t +read(int fd, void *buf, size_t count) +{ + return syscall(SYS_read, fd, (uintptr_t)buf, count); +} -- cgit v1.2.3