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Date: Fri, 1 Sep 2023 16:58:48 +0200
From: Natanael Copa <ncopa@...inelinux.org>
To: musl@...ts.openwall.com
Cc: Natanael Copa <ncopa@...inelinux.org>
Subject: [PATCH v2] add close_range() syscall wrapper
close_range() is a syscall present in FreeBSD 8.0 and Linux 5.9. glibc
2.34 added a wrapper.
Expose it under _GNU_SOURCE similar to what GNU libc does. Also expose
it under _BSD_SOURCE since it is also a FreeBSD function.
---
v2: use syscall without __syscall_ret
include/unistd.h | 3 +++
src/linux/close_range.c | 8 ++++++++
2 files changed, 11 insertions(+)
create mode 100644 src/linux/close_range.c
diff --git a/include/unistd.h b/include/unistd.h
index 5bc7f798..d89e3d4c 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -161,6 +161,9 @@ unsigned ualarm(unsigned, unsigned);
#define L_INCR 1
#define L_XTND 2
int brk(void *);
+#define CLOSE_RANGE_UNSHARE (1U << 1)
+#define CLOSE_RANGE_CLOEXEC (1U << 2)
+int close_range(unsigned int, unsigned int, int);
void *sbrk(intptr_t);
pid_t vfork(void);
int vhangup(void);
diff --git a/src/linux/close_range.c b/src/linux/close_range.c
new file mode 100644
index 00000000..3f1378a0
--- /dev/null
+++ b/src/linux/close_range.c
@@ -0,0 +1,8 @@
+#define _GNU_SOURCE
+#include <unistd.h>
+#include "syscall.h"
+
+int close_range(unsigned int first, unsigned int last, int flags)
+{
+ return syscall(SYS_close_range, first, last, flags);
+}
--
2.42.0
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