From dfe9bbdbfa86a89afad5681c65a445e9774a0199 Mon Sep 17 00:00:00 2001
From: EnderIce2 <enderice2@protonmail.com>
Date: Fri, 14 Feb 2025 02:17:47 +0200
Subject: [PATCH] userspace/libc: implement read, pread, write & pwrite

Signed-off-by: EnderIce2 <enderice2@protonmail.com>
---
 Userspace/libc/include/unistd.h |  8 ++++----
 Userspace/libc/src/std/unistd.c | 26 ++++++++++++++++++++++----
 2 files changed, 26 insertions(+), 8 deletions(-)

diff --git a/Userspace/libc/include/unistd.h b/Userspace/libc/include/unistd.h
index 1106d1e5..57a19a43 100644
--- a/Userspace/libc/include/unistd.h
+++ b/Userspace/libc/include/unistd.h
@@ -116,10 +116,10 @@ extern "C"
 	long int pathconf(const char *, int);
 	int pause(void);
 	int pipe(int[2]);
-	ssize_t pread(int, void *, size_t, off_t);
+	ssize_t pread(int fildes, void *buf, size_t nbyte, off_t offset);
 	int pthread_atfork(void (*)(void), void (*)(void), void (*)(void));
-	ssize_t pwrite(int, const void *, size_t, off_t);
-	ssize_t read(int, void *, size_t);
+	ssize_t pwrite(int fildes, const void *buf, size_t nbyte, off_t offset);
+	ssize_t read(int fildes, void *buf, size_t nbyte);
 	int readlink(const char *, char *, size_t);
 	int rmdir(const char *);
 	void *sbrk(intptr_t);
@@ -144,7 +144,7 @@ extern "C"
 	int unlink(const char *);
 	int usleep(useconds_t);
 	pid_t vfork(void);
-	ssize_t write(int, const void *, size_t);
+	ssize_t write(int fildes, const void *buf, size_t nbyte);
 
 #ifdef __cplusplus
 }
diff --git a/Userspace/libc/src/std/unistd.c b/Userspace/libc/src/std/unistd.c
index d240e1d7..9bf75384 100644
--- a/Userspace/libc/src/std/unistd.c
+++ b/Userspace/libc/src/std/unistd.c
@@ -229,10 +229,24 @@ export int pause(void)
 }
 
 export int pipe(int[2]);
-export ssize_t pread(int, void *, size_t, off_t);
+
+export ssize_t pread(int fildes, void *buf, size_t nbyte, off_t offset)
+{
+	return __check_errno(call_pread(fildes, buf, nbyte, offset), -1);
+}
+
 export int pthread_atfork(void (*)(void), void (*)(void), void (*)(void));
-export ssize_t pwrite(int, const void *, size_t, off_t);
-export ssize_t read(int, void *, size_t);
+
+export ssize_t pwrite(int fildes, const void *buf, size_t nbyte, off_t offset)
+{
+	return __check_errno(call_pwrite(fildes, buf, nbyte, offset), -1);
+}
+
+export ssize_t read(int fildes, void *buf, size_t nbyte)
+{
+	return __check_errno(call_read(fildes, buf, nbyte), -1);
+}
+
 export int readlink(const char *, char *, size_t);
 export int rmdir(const char *);
 export void *sbrk(intptr_t);
@@ -278,4 +292,8 @@ export useconds_t ualarm(useconds_t, useconds_t);
 export int unlink(const char *);
 export int usleep(useconds_t);
 export pid_t vfork(void);
-export ssize_t write(int, const void *, size_t);
+
+export ssize_t write(int fildes, const void *buf, size_t nbyte)
+{
+	return __check_errno(call_write(fildes, buf, nbyte), -1);
+}