fi
+# check if select and nonblocking sockets actually work.
+{ echo "$as_me:$LINENO: checking if nonblocking sockets work" >&5
+echo $ECHO_N "checking if nonblocking sockets work... $ECHO_C" >&6; }
+if test "$cross_compiling" = yes; then
+
+ { echo "$as_me:$LINENO: result: crosscompile(yes)" >&5
+echo "${ECHO_T}crosscompile(yes)" >&6; }
+
+else
+ cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h. */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h. */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <errno.h>
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
+
+int
+main ()
+{
+
+ int port;
+ int sfd, cfd;
+ int num = 10;
+ int i, p;
+ struct sockaddr_in a;
+ /* test if select and nonblocking reads work well together */
+ /* open port.
+ fork child to send 10 messages.
+ select to read.
+ then try to nonblocking read the 10 messages
+ then, nonblocking read must give EAGAIN
+ */
+
+ port = 12345 + (time(0)%32);
+ sfd = socket(PF_INET, SOCK_DGRAM, 0);
+ if(sfd == -1) {
+ perror("socket");
+ return 1;
+ }
+ memset(&a, 0, sizeof(a));
+ a.sin_family = AF_INET;
+ a.sin_port = htons(port);
+ a.sin_addr.s_addr = inet_addr("127.0.0.1");
+ if(bind(sfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
+ perror("bind");
+ return 1;
+ }
+ if(fcntl(sfd, F_SETFL, O_NONBLOCK) == -1) {
+ perror("fcntl");
+ return 1;
+ }
+
+ cfd = socket(PF_INET, SOCK_DGRAM, 0);
+ if(cfd == -1) {
+ perror("client socket");
+ return 1;
+ }
+ a.sin_port = 0;
+ if(bind(cfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
+ perror("client bind");
+ return 1;
+ }
+ a.sin_port = htons(port);
+
+ /* no handler, causes exit in 10 seconds */
+ alarm(10);
+
+ /* send and receive on the socket */
+ if((p=fork()) == 0) {
+ for(i=0; i<num; i++) {
+ if(sendto(cfd, &i, sizeof(i), 0,
+ (struct sockaddr*)&a, sizeof(a)) < 0) {
+ perror("sendto");
+ return 1;
+ }
+ }
+ } else {
+ /* parent */
+ fd_set rset;
+ int x;
+ if(p == -1) {
+ perror("fork");
+ return 1;
+ }
+ FD_ZERO(&rset);
+ FD_SET(sfd, &rset);
+ if(select(sfd+1, &rset, NULL, NULL, NULL) < 1) {
+ perror("select");
+ return 1;
+ }
+ i = 0;
+ while(i < num) {
+ if(recv(sfd, &x, sizeof(x), 0) != sizeof(x)) {
+ if(errno == EAGAIN)
+ continue;
+ perror("recv");
+ return 1;
+ }
+ i++;
+ }
+ /* now we want to get EAGAIN: nonblocking goodness */
+ errno = 0;
+ recv(sfd, &x, sizeof(x), 0);
+ if(errno != EAGAIN) {
+ perror("trying to recv again");
+ return 1;
+ }
+ /* EAGAIN encountered */
+ }
+
+ close(sfd);
+ close(cfd);
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest$ac_exeext
+if { (ac_try="$ac_link"
+case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+ (eval "$ac_link") 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
+ { (case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+ (eval "$ac_try") 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+
+ { echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6; }
+
+else
+ echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+( exit $ac_status )
+
+ { echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define NONBLOCKING_IS_BROKEN 1
+_ACEOF
+
+
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
+fi
+
+
+
# check mkdir
{ echo "$as_me:$LINENO: checking whether mkdir has one arg" >&5
echo $ECHO_N "checking whether mkdir has one arg... $ECHO_C" >&6; }
AC_DEFINE(DARWIN_BROKEN_SETREUID, 1, [Define this if on macOSX10.4-darwin8 and setreuid and setregid do not work])
fi
+# check if select and nonblocking sockets actually work.
+AC_MSG_CHECKING([if nonblocking sockets work])
+AC_RUN_IFELSE(AC_LANG_PROGRAM([
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <errno.h>
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
+],[[
+ int port;
+ int sfd, cfd;
+ int num = 10;
+ int i, p;
+ struct sockaddr_in a;
+ /* test if select and nonblocking reads work well together */
+ /* open port.
+ fork child to send 10 messages.
+ select to read.
+ then try to nonblocking read the 10 messages
+ then, nonblocking read must give EAGAIN
+ */
+
+ port = 12345 + (time(0)%32);
+ sfd = socket(PF_INET, SOCK_DGRAM, 0);
+ if(sfd == -1) {
+ perror("socket");
+ return 1;
+ }
+ memset(&a, 0, sizeof(a));
+ a.sin_family = AF_INET;
+ a.sin_port = htons(port);
+ a.sin_addr.s_addr = inet_addr("127.0.0.1");
+ if(bind(sfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
+ perror("bind");
+ return 1;
+ }
+ if(fcntl(sfd, F_SETFL, O_NONBLOCK) == -1) {
+ perror("fcntl");
+ return 1;
+ }
+
+ cfd = socket(PF_INET, SOCK_DGRAM, 0);
+ if(cfd == -1) {
+ perror("client socket");
+ return 1;
+ }
+ a.sin_port = 0;
+ if(bind(cfd, (struct sockaddr*)&a, sizeof(a)) < 0) {
+ perror("client bind");
+ return 1;
+ }
+ a.sin_port = htons(port);
+
+ /* no handler, causes exit in 10 seconds */
+ alarm(10);
+
+ /* send and receive on the socket */
+ if((p=fork()) == 0) {
+ for(i=0; i<num; i++) {
+ if(sendto(cfd, &i, sizeof(i), 0,
+ (struct sockaddr*)&a, sizeof(a)) < 0) {
+ perror("sendto");
+ return 1;
+ }
+ }
+ } else {
+ /* parent */
+ fd_set rset;
+ int x;
+ if(p == -1) {
+ perror("fork");
+ return 1;
+ }
+ FD_ZERO(&rset);
+ FD_SET(sfd, &rset);
+ if(select(sfd+1, &rset, NULL, NULL, NULL) < 1) {
+ perror("select");
+ return 1;
+ }
+ i = 0;
+ while(i < num) {
+ if(recv(sfd, &x, sizeof(x), 0) != sizeof(x)) {
+ if(errno == EAGAIN)
+ continue;
+ perror("recv");
+ return 1;
+ }
+ i++;
+ }
+ /* now we want to get EAGAIN: nonblocking goodness */
+ errno = 0;
+ recv(sfd, &x, sizeof(x), 0);
+ if(errno != EAGAIN) {
+ perror("trying to recv again");
+ return 1;
+ }
+ /* EAGAIN encountered */
+ }
+
+ close(sfd);
+ close(cfd);
+]]), [
+ AC_MSG_RESULT([yes])
+], [
+ AC_MSG_RESULT([no])
+ AC_DEFINE([NONBLOCKING_IS_BROKEN], 1, [Define if the network stack does not fully support nonblocking io (causes lower performance).])
+], [
+ AC_MSG_RESULT([crosscompile(yes)])
+])
+
# check mkdir
AC_MSG_CHECKING([whether mkdir has one arg])
AC_TRY_COMPILE([
projects / thirdparty / unbound.git / commitdiff
