[PATCH v2 01/46] libc/sysdeps: add dup3 syscall wrapper
Markos Chandras
markos.chandras at gmail.com
Mon Nov 26 14:23:43 UTC 2012
From: Mike Frysinger <vapier at gentoo.org>
Some projects (like udev) are starting to use this.
Signed-off-by: Mike Frysinger <vapier at gentoo.org>
---
include/unistd.h | 6 ++++++
libc/sysdeps/linux/common/Makefile.in | 1 +
libc/sysdeps/linux/common/dup3.c | 13 +++++++++++++
3 files changed, 20 insertions(+)
create mode 100644 libc/sysdeps/linux/common/dup3.c
diff --git a/include/unistd.h b/include/unistd.h
index 1b2fd4d..766fcf3 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -513,6 +513,12 @@ extern int dup (int __fd) __THROW __wur;
extern int dup2 (int __fd, int __fd2) __THROW;
libc_hidden_proto(dup2)
+#ifdef __USE_GNU
+/* Duplicate FD to FD2, closing FD2 and making it open on the same
+ file while setting flags according to FLAGS. */
+extern int dup3 (int __fd, int __fd2, int __flags) __THROW;
+#endif
+
/* NULL-terminated array of "NAME=VALUE" environment variables. */
extern char **__environ;
#ifdef __USE_GNU
diff --git a/libc/sysdeps/linux/common/Makefile.in b/libc/sysdeps/linux/common/Makefile.in
index b39082b..bbffd9a 100644
--- a/libc/sysdeps/linux/common/Makefile.in
+++ b/libc/sysdeps/linux/common/Makefile.in
@@ -23,6 +23,7 @@ CSRC-$(UCLIBC_LINUX_SPECIFIC) += \
bdflush.c \
capget.c \
capset.c \
+ dup3.c \
eventfd.c \
inotify.c \
ioperm.c \
diff --git a/libc/sysdeps/linux/common/dup3.c b/libc/sysdeps/linux/common/dup3.c
new file mode 100644
index 0000000..539c071
--- /dev/null
+++ b/libc/sysdeps/linux/common/dup3.c
@@ -0,0 +1,13 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * dup2() for uClibc
+ *
+ * Copyright (C) 2000-2006 Erik Andersen <andersen at uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <unistd.h>
+
+_syscall3(int, dup3, int, oldfd, int, newfd, int, flags)
--
1.8.0
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