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authorManoj Srivastava <srivasta@debian.org>2016-01-12 22:52:19 -0800
committerManoj Srivastava <srivasta@debian.org>2016-01-12 22:52:19 -0800
commitb6522e6981f04e1ca972204cea280ed27d8924a2 (patch)
treefdd677eefa3aed99f658c178f94719e781439de9 /mcon/U/d_pipe2.U
parentff52cc133ccaff7df1b92de5f005b2d574734941 (diff)
parente6df8b40bcec77dd84e583c2cfb0152e8666210f (diff)
Merge branch 'upstream'
Diffstat (limited to 'mcon/U/d_pipe2.U')
-rw-r--r--mcon/U/d_pipe2.U46
1 files changed, 46 insertions, 0 deletions
diff --git a/mcon/U/d_pipe2.U b/mcon/U/d_pipe2.U
new file mode 100644
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+++ b/mcon/U/d_pipe2.U
@@ -0,0 +1,46 @@
+?RCS:
+?RCS: Copyright (c) 2015, Raphael Manfredi
+?RCS:
+?RCS: You may redistribute only under the terms of the Artistic License,
+?RCS: as specified in the README file that comes with the distribution.
+?RCS: You may reuse parts of this distribution only within the terms of
+?RCS: that same Artistic License; a copy of which may be found at the root
+?RCS: of the source tree for dist 4.0.
+?RCS:
+?MAKE:d_pipe2: Trylink cat i_unistd i_sysfile
+?MAKE: -pick add $@ %<
+?S:d_pipe2:
+?S: This variable conditionally defines the HAS_PIPE2 symbol, which
+?S: indicates to the C program that the pipe2() routine is available
+?S: to create an inter-process channel with some flags.
+?S:.
+?C:HAS_PIPE2:
+?C: This symbol, if defined, indicates that the pipe routine is
+?C: available to create an inter-process channel with O_CLOEXEC or
+?C: O_NONBLOCK flags.
+?C:.
+?H:#$d_pipe2 HAS_PIPE2 /**/
+?H:.
+?LINT:set d_pipe2
+: see if pipe2 exists
+$cat >try.c <<EOC
+#$i_unistd I_UNISTD
+#$i_sysfile I_SYS_FILE
+#ifdef I_UNISTD
+#include <unistd.h>
+#endif
+#ifdef I_SYS_FILE
+#include <sys/file.h> /* For O_* constants */
+#endif
+#include <fcntl.h> /* For O_* constants */
+int main(void)
+{
+ static int fds[2], ret;
+ ret |= pipe2(fds, O_CLOEXEC | O_NONBLOCK);
+ return ret ? 0 : 1;
+}
+EOC
+cyn=pipe2
+set d_pipe2
+eval $trylink
+