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musl: add preadv2 and pwritev2

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oreo639 2025-05-10 18:30:00 -07:00 • committed by classabbyamp
parent 9016a52089
commit 309603a6cf
1 changed files with 77 additions and 0 deletions
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77
srcpkgs/musl/patches/add-preadv2-pwritev2.patch Normal file
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@ -0,0 +1,77 @@
From 81cced6ebeb4419a78a8892ec7d7e28f5582d24a Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 25 Jan 2024 12:02:34 -0500
Subject: [PATCH] add preadv2 and pwritev2 syscall wrappers, flag value macros
---
include/sys/uio.h | 7 +++++++
src/linux/preadv2.c | 17 +++++++++++++++++
src/linux/pwritev2.c | 17 +++++++++++++++++
3 files changed, 41 insertions(+)
create mode 100644 src/linux/preadv2.c
create mode 100644 src/linux/pwritev2.c
diff --git a/include/sys/uio.h b/include/sys/uio.h
index 90e5939ed..8b5e3de79 100644
--- a/include/sys/uio.h
+++ b/include/sys/uio.h
@@ -39,6 +39,13 @@ ssize_t pwritev (int, const struct iovec *, int, off_t);
#ifdef _GNU_SOURCE
ssize_t process_vm_writev(pid_t, const struct iovec *, unsigned long, const struct iovec *, unsigned long, unsigned long);
ssize_t process_vm_readv(pid_t, const struct iovec *, unsigned long, const struct iovec *, unsigned long, unsigned long);
+ssize_t preadv2 (int, const struct iovec *, int, off_t, int);
+ssize_t pwritev2 (int, const struct iovec *, int, off_t, int);
+#define RWF_HIPRI 0x00000001
+#define RWF_DSYNC 0x00000002
+#define RWF_SYNC 0x00000004
+#define RWF_NOWAIT 0x00000008
+#define RWF_APPEND 0x00000010
#endif
#ifdef __cplusplus
diff --git a/src/linux/preadv2.c b/src/linux/preadv2.c
new file mode 100644
index 000000000..5e7ab70f1
--- /dev/null
+++ b/src/linux/preadv2.c
@@ -0,0 +1,17 @@
+#define _GNU_SOURCE
+#include <sys/uio.h>
+#include <unistd.h>
+#include "syscall.h"
+
+ssize_t preadv2(int fd, const struct iovec *iov, int count, off_t ofs, int flags)
+{
+#ifdef SYS_preadv
+ if (!flags) {
+ if (ofs==-1) return readv(fd, iov, count);
+ return syscall_cp(SYS_preadv, fd, iov, count,
+ (long)(ofs), (long)(ofs>>32));
+ }
+#endif
+ return syscall_cp(SYS_preadv2, fd, iov, count,
+ (long)(ofs), (long)(ofs>>32), flags);
+}
diff --git a/src/linux/pwritev2.c b/src/linux/pwritev2.c
new file mode 100644
index 000000000..ece90d7ca
--- /dev/null
+++ b/src/linux/pwritev2.c
@@ -0,0 +1,17 @@
+#define _GNU_SOURCE
+#include <sys/uio.h>
+#include <unistd.h>
+#include "syscall.h"
+
+ssize_t pwritev2(int fd, const struct iovec *iov, int count, off_t ofs, int flags)
+{
+#ifdef SYS_pwritev
+ if (!flags) {
+ if (ofs==-1) return writev(fd, iov, count);
+ return syscall_cp(SYS_pwritev, fd, iov, count,
+ (long)(ofs), (long)(ofs>>32));
+ }
+#endif
+ return syscall_cp(SYS_pwritev2, fd, iov, count,
+ (long)(ofs), (long)(ofs>>32), flags);
+}