passfd: allow compilation on mingw

[gnulib.git] / lib / passfd.c

diff --git a/lib/passfd.c b/lib/passfd.c
index 1ab94b4..5d4c6a7 100644 (file)
--- a/lib/passfd.c
+++ b/lib/passfd.c
@@ -24,7 +24,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/types.h>
-#include <sys/uio.h>
 #include <unistd.h>
 
 #include <sys/socket.h>
@@ -38,6 +37,7 @@
 # define MSG_CMSG_CLOEXEC 0
 #endif
 
+#if HAVE_SENDMSG
 /* sendfd sends the file descriptor fd along the socket
    to a process calling recvfd on the other end.
 
@@ -49,10 +49,10 @@ sendfd (int sock, int fd)
   char send = 0;
   struct iovec iov;
   struct msghdr msg;
-#if HAVE_UNIXSOCKET_SCM_RIGHTS_BSD44_WAY
+# if HAVE_UNIXSOCKET_SCM_RIGHTS_BSD44_WAY
   struct cmsghdr *cmsg;
   char buf[CMSG_SPACE (sizeof fd)];
-#endif
+# endif
 
   /* send at least one char */
   memset (&msg, 0, sizeof msg);
@@ -63,7 +63,7 @@ sendfd (int sock, int fd)
   msg.msg_name = NULL;
   msg.msg_namelen = 0;
 
-#if HAVE_UNIXSOCKET_SCM_RIGHTS_BSD44_WAY
+# if HAVE_UNIXSOCKET_SCM_RIGHTS_BSD44_WAY
   msg.msg_control = buf;
   msg.msg_controllen = sizeof buf;
   cmsg = CMSG_FIRSTHDR (&msg);
@@ -72,19 +72,29 @@ sendfd (int sock, int fd)
   cmsg->cmsg_len = CMSG_LEN (sizeof fd);
   /* Initialize the payload: */
   memcpy (CMSG_DATA (cmsg), &fd, sizeof fd);
-#elif HAVE_UNIXSOCKET_SCM_RIGHTS_BSD43_WAY
+# elif HAVE_UNIXSOCKET_SCM_RIGHTS_BSD43_WAY
   msg.msg_accrights = &fd;
   msg.msg_accrightslen = sizeof fd;
-#else
+# else
   errno = ENOSYS;
   return -1;
-#endif
+# endif
 
   if (sendmsg (sock, &msg, 0) != iov.iov_len)
     return -1;
   return 0;
 }
+#else
+int
+sendfd (int sock _GL_UNUSED, int fd _GL_UNUSED)
+{
+  errno = ENOSYS;
+  return -1;
+}
+#endif
+
 
+#if HAVE_RECVMSG
 /* recvfd receives a file descriptor through the socket.
    The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>).
 
@@ -97,11 +107,11 @@ recvfd (int sock, int flags)
   struct iovec iov;
   struct msghdr msg;
   int fd = -1;
-#if HAVE_UNIXSOCKET_SCM_RIGHTS_BSD44_WAY
+# if HAVE_UNIXSOCKET_SCM_RIGHTS_BSD44_WAY
   struct cmsghdr *cmsg;
   char buf[CMSG_SPACE (sizeof fd)];
   int flags_recvmsg = flags & O_CLOEXEC ? MSG_CMSG_CLOEXEC : 0;
-#endif
+# endif
 
   if ((flags & ~O_CLOEXEC) != 0)
     {
@@ -118,7 +128,7 @@ recvfd (int sock, int flags)
   msg.msg_name = NULL;
   msg.msg_namelen = 0;
 
-#if HAVE_UNIXSOCKET_SCM_RIGHTS_BSD44_WAY
+# if HAVE_UNIXSOCKET_SCM_RIGHTS_BSD44_WAY
   msg.msg_control = buf;
   msg.msg_controllen = sizeof buf;
   cmsg = CMSG_FIRSTHDR (&msg);
@@ -156,7 +166,7 @@ recvfd (int sock, int flags)
         }
     }
 
-#elif HAVE_UNIXSOCKET_SCM_RIGHTS_BSD43_WAY
+# elif HAVE_UNIXSOCKET_SCM_RIGHTS_BSD43_WAY
   msg.msg_accrights = &fd;
   msg.msg_accrightslen = sizeof fd;
   if (recvmsg (sock, &msg, 0) < 0)
@@ -173,9 +183,17 @@ recvfd (int sock, int flags)
           return -1;
         }
     }
-#else
+# else
   errno = ENOSYS;
-#endif
+# endif
 
   return fd;
 }
+#else
+int
+recvfd (int sock _GL_UNUSED, int flags _GL_UNUSED)
+{
+  errno = ENOSYS;
+  return -1;
+}
+#endif