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authorBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2011-05-11 13:12:14 +0200
committerBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2011-05-11 13:12:14 +0200
commitd3ddb92ea03c89fe7d56a0bcbfbe64743bc51210 (patch)
treef195741cf9705d7e924c6a88f1818d1e307ef2b5
parent6af34270fa28a4274576a6d068e6a83346480f2e (diff)
add pipe2()
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
-rw-r--r--extra/Configs/Config.in3
-rw-r--r--include/unistd.h7
-rw-r--r--libc/sysdeps/linux/common/Makefile.in3
-rw-r--r--libc/sysdeps/linux/common/bits/kernel-features.h13
-rw-r--r--libc/sysdeps/linux/common/pipe2.c16
-rw-r--r--libc/sysdeps/linux/common/stubs.c8
6 files changed, 48 insertions, 2 deletions
diff --git a/extra/Configs/Config.in b/extra/Configs/Config.in
index 147a316e6..7dffdeab9 100644
--- a/extra/Configs/Config.in
+++ b/extra/Configs/Config.in
@@ -915,7 +915,8 @@ config UCLIBC_LINUX_SPECIFIC
default y
help
capget(), capset(), fstatfs(), inotify_*(), ioperm(), iopl(),
- madvise(), modify_ldt(), personality(), prctl()/arch_prctl(),
+ madvise(), modify_ldt(), pipe2(), personality(),
+ prctl()/arch_prctl(),
ppoll(), readahead(), reboot(), remap_file_pages(),
sched_getaffinity(), sched_setaffinity(), sendfile(),
setfsgid(), setfsuid(), setresuid(),
diff --git a/include/unistd.h b/include/unistd.h
index c421cb308..6b614dd05 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -389,6 +389,13 @@ extern ssize_t pwrite64 (int __fd, __const void *__buf, size_t __n,
extern int pipe (int __pipedes[2]) __THROW __wur;
libc_hidden_proto(pipe)
+#ifdef __USE_GNU
+/* Same as pipe but apply flags passed in FLAGS to the new file
+ descriptors. */
+extern int pipe2 (int __pipedes[2], int __flags) __THROW __wur;
+libc_hidden_proto(pipe2)
+#endif
+
/* Schedule an alarm. In SECONDS seconds, the process will get a SIGALRM.
If SECONDS is zero, any currently scheduled alarm will be cancelled.
The function returns the number of seconds remaining until the last
diff --git a/libc/sysdeps/linux/common/Makefile.in b/libc/sysdeps/linux/common/Makefile.in
index 8811268d0..d97c73dcb 100644
--- a/libc/sysdeps/linux/common/Makefile.in
+++ b/libc/sysdeps/linux/common/Makefile.in
@@ -19,7 +19,8 @@ CSRC-$(UCLIBC_LINUX_MODULE_24) += create_module.c query_module.c \
get_kernel_syms.c
# we need these internally: fstatfs.c statfs.c
CSRC-$(UCLIBC_LINUX_SPECIFIC) += capget.c capset.c inotify.c ioperm.c iopl.c \
- madvise.c modify_ldt.c personality.c ppoll.c prctl.c readahead.c reboot.c \
+ madvise.c modify_ldt.c pipe2.c personality.c ppoll.c prctl.c \
+ readahead.c reboot.c \
remap_file_pages.c sched_getaffinity.c sched_setaffinity.c \
sendfile64.c sendfile.c setfsgid.c setfsuid.c setresuid.c \
splice.c vmsplice.c tee.c signalfd.c swapoff.c swapon.c \
diff --git a/libc/sysdeps/linux/common/bits/kernel-features.h b/libc/sysdeps/linux/common/bits/kernel-features.h
index b338e0770..6bf554457 100644
--- a/libc/sysdeps/linux/common/bits/kernel-features.h
+++ b/libc/sysdeps/linux/common/bits/kernel-features.h
@@ -309,6 +309,19 @@
# define __ASSUME_O_CLOEXEC 1
#endif
+/* Support for various CLOEXEC and NONBLOCK flags was added for x86,
+ * x86-64, PPC, IA-64, and SPARC in 2.6.27. */
+#if __LINUX_KERNEL_VERSION >= 0x02061b \
+ && (defined __i386__ || defined __x86_64__ || defined __powerpc__ \
+ || defined __ia64__ || defined __sparc__ || defined __s390__)
+/* # define __ASSUME_SOCK_CLOEXEC 1 */
+/* # define __ASSUME_IN_NONBLOCK 1 */
+# define __ASSUME_PIPE2 1
+/* # define __ASSUME_EVENTFD2 1 */
+/* # define __ASSUME_SIGNALFD4 1 */
+#endif
+
+
/* These features were surely available with 2.4.12. */
#if __LINUX_KERNEL_VERSION >= 132108 && defined __mc68000__
# define __ASSUME_MMAP2_SYSCALL 1
diff --git a/libc/sysdeps/linux/common/pipe2.c b/libc/sysdeps/linux/common/pipe2.c
new file mode 100644
index 000000000..0a3686d81
--- /dev/null
+++ b/libc/sysdeps/linux/common/pipe2.c
@@ -0,0 +1,16 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * pipe2() for uClibc
+ *
+ * Copyright (C) 2011 Bernhard Reutner-Fischer <uclibc@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#ifdef __NR_pipe2
+_syscall2(int, pipe2, int *, filedes, int, flags)
+libc_hidden_def(pipe2)
+#endif
diff --git a/libc/sysdeps/linux/common/stubs.c b/libc/sysdeps/linux/common/stubs.c
index 1aa07de36..f7c6dc5c5 100644
--- a/libc/sysdeps/linux/common/stubs.c
+++ b/libc/sysdeps/linux/common/stubs.c
@@ -31,6 +31,10 @@ static int enosys_stub(void)
# undef __NR_sync_file_range
#endif
+#ifndef __UCLIBC_LINUX_SPECIFIC__
+# undef __NR_pipe2
+#endif
+
#ifndef __UCLIBC_HAS_SOCKET__
# undef __NR_accept
# undef __NR_accept4
@@ -177,6 +181,10 @@ make_stub(lremovexattr)
make_stub(lsetxattr)
#endif
+#ifndef __NR_pipe2
+make_stub(pipe2)
+#endif
+
#ifndef __NR_pivot_root
make_stub(pivot_root)
#endif