[klibc] [klibc:master] Add pipe2() system call

[klibc-bot for H. Peter Anvin]

Commit-ID:  ded7408767c5c2b1d21386efff594bf369380fa8
Gitweb:     http://git.kernel.org/?p=libs/klibc/klibc.git;a=commit;h=ded7408767c5c2b1d21386efff594bf369380fa8
Author:     H. Peter Anvin <hpa at zytor.com>
AuthorDate: Mon, 21 May 2012 15:22:51 -0700
Committer:  H. Peter Anvin <hpa at zytor.com>
CommitDate: Mon, 21 May 2012 15:22:51 -0700

[klibc] Add pipe2() system call

pipe2() is like pipe() except we can set the O_CLOEXEC flag via a
second argument.  Unlike pipe(), noone seems to have seemed fit to
create a completely ad hoc calling convention for pipe2(), so we can
just define it in one simple place.  Thank goodness.

Signed-off-by: H. Peter Anvin <hpa at zytor.com>

---
 usr/include/unistd.h   |    1 +
 usr/klibc/SYSCALLS.def |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/usr/include/unistd.h b/usr/include/unistd.h
index 3244e21..3af4c8f 100644
--- a/usr/include/unistd.h
+++ b/usr/include/unistd.h
@@ -71,6 +71,7 @@ __extern int mkdir(const char *, mode_t);
 __extern int mkdirat(int, const char *, const char *, mode_t);
 __extern int rmdir(const char *);
 __extern int pipe(int *);
+__extern int pipe2(int *, int);
 __extern int chroot(const char *);
 __extern int symlink(const char *, const char *);
 __extern int symlinkat(int, const char *, const char *);
diff --git a/usr/klibc/SYSCALLS.def b/usr/klibc/SYSCALLS.def
index 5fd2753..d935a92 100644
--- a/usr/klibc/SYSCALLS.def
+++ b/usr/klibc/SYSCALLS.def
@@ -124,6 +124,7 @@ int mkdir(const char *, mode_t);
 <?> int mkdirat(int, const char *, const char *, mode_t);
 int rmdir(const char *);
 <!alpha,ia64,mips,mips64,sh,sparc,sparc64> int pipe(int *);
+int pipe2(int *, int);
 mode_t umask(mode_t);
 int chroot(const char *);
 int symlink(const char *, const char *);