integrate Linux sendfile into trysendfile.c infrastructure

first stab at AIX 5 sendfile support

Makefile

@@ -548,7 +548,7 @@ clean:
 	rm -f *.o *.a *.da *.bbg *.bb core t haveip6.h haven2i.h \
 havesl.h haveinline.h iopause.h select.h havekqueue.h haveepoll.h \
 libepoll havesigio.h havebsdsf.h havesendfile.h havescope.h havedevpoll.h \
-Makefile dep
+Makefile dep libsocket
 
 INCLUDES=buffer.h byte.h fmt.h ip4.h ip6.h mmap.h scan.h socket.h str.h stralloc.h \
 uint16.h uint32.h uint64.h open.h textcode.h tai.h taia.h dns.h iopause.h case.h \

io/io_sendfile.c

@@ -17,30 +17,6 @@ int64 io_sendfile(int64 s,int64 fd,uint64 off,uint64 n) {
     return (errno==EAGAIN?(sbytes?sbytes:-1):-3);
   return n;
 }
-#elif defined(__linux__)
-
-#if defined(__GLIBC__)
-#include <sys/sendfile.h>
-#elif defined(__dietlibc__)
-#include <sys/sendfile.h>
-#else
-#include <linux/unistd.h>
-_syscall4(int,sendfile,int,out,int,in,long *,offset,unsigned long,count)
-#endif
-
-int64 io_sendfile(int64 s,int64 fd,uint64 off,uint64 n) {
-  off_t o=off;
-  io_entry* e=array_get(&io_fds,sizeof(io_entry),s);
-  off_t i=sendfile(s,fd,&o,n);
-  if (i==-1) {
-    if (e) {
-      e->canwrite=0;
-      e->next_write=-1;
-    }
-    if (errno!=EAGAIN) i=-3;
-  }
-  return i;
-}
 
 #elif defined(HAVE_SENDFILE)
 
@@ -67,6 +43,30 @@ int64 io_sendfile(int64 out,int64 in,uint64 off,uint64 bytes) {
   return sendfile64(out,in,&o,bytes);
 }
 
+#elif defined(__linux__)
+
+#if defined(__GLIBC__)
+#include <sys/sendfile.h>
+#elif defined(__dietlibc__)
+#include <sys/sendfile.h>
+#else
+#include <linux/unistd.h>
+_syscall4(int,sendfile,int,out,int,in,long *,offset,unsigned long,count)
+#endif
+
+int64 io_sendfile(int64 s,int64 fd,uint64 off,uint64 n) {
+  off_t o=off;
+  io_entry* e=array_get(&io_fds,sizeof(io_entry),s);
+  off_t i=sendfile(s,fd,&o,n);
+  if (i==-1) {
+    if (e) {
+      e->canwrite=0;
+      e->next_write=-1;
+    }
+    if (errno!=EAGAIN) i=-3;
+  }
+  return i;
+}
 #endif
 
 #else

trysendfile.c

@@ -34,6 +34,48 @@ int main() {
   perror("sendfile");
   return 0;
 }
+#elif defined (_AIX)
+
+#define _FILE_OFFSET_BITS 64
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <stdio.h>
+
+int main() {
+  int fd=open("havesendfile.c",0);
+  struct sf_parms p;
+  int destfd=1;
+  p.header_data="header";
+  p.header_length=6;
+  p.file_descriptor=fd;
+  p.file_offset=0;
+  p.file_bytes=23;
+  p.trailer_data="footer";
+  p.trailer_length=6;
+  if (send_file(&destfd,&p,0)>=0)
+    printf("sent %lu bytes.\n",p.bytes_sent);
+}
+#elif defined(__linux__)
+
+#define _FILE_OFFSET_BITS 64
+#if defined(__GLIBC__)
+#include <sys/sendfile.h>
+#elif defined(__dietlibc__)
+#include <sys/sendfile.h>
+#else
+#include <linux/unistd.h>
+_syscall4(int,sendfile,int,out,int,in,long *,offset,unsigned long,count)
+#endif
+
+int main() {
+  int fd=open("havesendfile.c",0);
+  off_t o=0;
+  off_t r=sendfile(1,fd,&o,23);
+  if (r!=-1)
+    printf("sent %llu bytes.\n",r);
+}
+
 #else
 #error unsupported architecture
 #endif