Include <sys/select.h> where needed

<sys/select.h> is required by POSIX.1-2001 to get the prototype of
select(2), but nearly no systems enforce that because older standards
let you get away with including some other headers.  Recent OpenBSD
hacking has removed that frail touch of friendliness, however, which
broke some compiles; fix all the way back to 9.1 by adding the required
standard.  Only vacuumdb.c was reported to fail, but it seems easier to
fix the whole lot in a fell swoop.

Per bug #14334 by Sean Farrell.

9 files changed, 30 insertions, 1 deletions

diff --git a/src/backend/libpq/auth.c b/src/backend/libpq/auth.c
index d907e6bc919..0ba85301149 100644
--- a/src/backend/libpq/auth.c
+++ b/src/backend/libpq/auth.c
@@ -20,6 +20,9 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <unistd.h>
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
 
 #include "common/ip.h"
 #include "common/md5.h"
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index 8a2ce913443..96578dcedb5 100644
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -28,6 +28,9 @@
 #include <arpa/inet.h>
 #include <signal.h>
 #include <time.h>
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
 
 #include "pgstat.h"
 
diff --git a/src/bin/pg_basebackup/pg_basebackup.c b/src/bin/pg_basebackup/pg_basebackup.c
index 42f3b273a62..d077544d62e 100644
--- a/src/bin/pg_basebackup/pg_basebackup.c
+++ b/src/bin/pg_basebackup/pg_basebackup.c
@@ -20,7 +20,9 @@
 #include <sys/wait.h>
 #include <signal.h>
 #include <time.h>
-
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
 #ifdef HAVE_LIBZ
 #include <zlib.h>
 #endif
diff --git a/src/bin/pg_basebackup/pg_recvlogical.c b/src/bin/pg_basebackup/pg_recvlogical.c
index 4c6cf7054eb..cb5f989a763 100644
--- a/src/bin/pg_basebackup/pg_recvlogical.c
+++ b/src/bin/pg_basebackup/pg_recvlogical.c
@@ -15,6 +15,9 @@
 #include <dirent.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
 
 /* local includes */
 #include "streamutil.h"
diff --git a/src/bin/pg_basebackup/receivelog.c b/src/bin/pg_basebackup/receivelog.c
index 062730b6b43..3a921ebf2db 100644
--- a/src/bin/pg_basebackup/receivelog.c
+++ b/src/bin/pg_basebackup/receivelog.c
@@ -16,6 +16,9 @@
 
 #include <sys/stat.h>
 #include <unistd.h>
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
 
 /* local includes */
 #include "receivelog.h"
diff --git a/src/bin/pg_dump/parallel.c b/src/bin/pg_dump/parallel.c
index 4549d11e202..bfd023f3e1f 100644
--- a/src/bin/pg_dump/parallel.c
+++ b/src/bin/pg_dump/parallel.c
@@ -59,6 +59,10 @@
 
 #include "postgres_fe.h"
 
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+
 #include "parallel.h"
 #include "pg_backup_utils.h"
 #include "fe_utils/string_utils.h"
diff --git a/src/bin/scripts/vacuumdb.c b/src/bin/scripts/vacuumdb.c
index c10b58bf0fc..32cb0fca2f2 100644
--- a/src/bin/scripts/vacuumdb.c
+++ b/src/bin/scripts/vacuumdb.c
@@ -12,6 +12,10 @@
 
 #include "postgres_fe.h"
 
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+
 #include "common.h"
 #include "fe_utils/simple_list.h"
 #include "fe_utils/string_utils.h"
diff --git a/src/port/pgsleep.c b/src/port/pgsleep.c
index ef7f7aba6ba..ecefe04ec08 100644
--- a/src/port/pgsleep.c
+++ b/src/port/pgsleep.c
@@ -14,6 +14,9 @@
 
 #include <unistd.h>
 #include <sys/time.h>
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
 
 /*
  * In a Windows backend, we don't use this implementation, but rather
diff --git a/src/test/examples/testlibpq2.c b/src/test/examples/testlibpq2.c
index 850993f6e82..07c6317a212 100644
--- a/src/test/examples/testlibpq2.c
+++ b/src/test/examples/testlibpq2.c
@@ -34,6 +34,10 @@
 #include <errno.h>
 #include <sys/time.h>
 #include <sys/types.h>
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+
 #include "libpq-fe.h"
 
 static void