configure probes for accept4(), dup3(), pipe2()

These will shortly be used to implement I/O operations that create file
descriptors with the FD_CLOEXEC flag set atomically.

1 files changed, 18 insertions, 0 deletions

diff --git a/config_h.SH b/config_h.SH
index e5e08eef54..b8300b4941 100755
--- a/config_h.SH
+++ b/config_h.SH
@@ -2314,6 +2314,12 @@ sed <<!GROK!THIS! >$CONFIG_H -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un
  */
 #$d__fwalk HAS__FWALK		/**/
 
+/* HAS_ACCEPT4:
+ *	This symbol, if defined, indicates that the accept4
+ *	system call is available to accept socket connections.
+ */
+#$d_accept4 HAS_ACCEPT4		/**/
+
 /* HAS_ACOSH:
  *	This symbol, if defined, indicates that the acosh routine is
  *	available to do the inverse hyperbolic cosine function.
@@ -2445,6 +2451,12 @@ sed <<!GROK!THIS! >$CONFIG_H -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un
  */
 #$d_dlsymun 	DLSYM_NEEDS_UNDERSCORE 	/**/
 
+/* HAS_DUP3:
+ *	This symbol, if defined, indicates that the dup3
+ *	system call is available to duplicate file descriptors.
+ */
+#$d_dup3 HAS_DUP3		/**/
+
 /* HAS_ERF:
  *	This symbol, if defined, indicates that the erf routine is
  *	available to do the error function.
@@ -3136,6 +3148,12 @@ sed <<!GROK!THIS! >$CONFIG_H -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un
  */
 #$d_off64_t	HAS_OFF64_T    		/**/
 
+/* HAS_PIPE2:
+ *	This symbol, if defined, indicates that the pipe2
+ *	system call is available to create inter-process pipes.
+ */
+#$d_pipe2 HAS_PIPE2		/**/
+
 /* HAS_PRCTL:
  *	This symbol, if defined, indicates that the prctl routine is
  *	available to set process title.