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129 lines
2.7 KiB
C
129 lines
2.7 KiB
C
/* http://delegate.uec.ac.jp:8081/club/mma/~shimiz98/misc/sendfile.html */
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#define _FILE_OFFSET_BITS 64
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#include "io_internal.h"
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#include "havebsdsf.h"
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#include "havesendfile.h"
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#include <errno.h>
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#if defined(HAVE_BSDSENDFILE)
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#define SENDFILE 1
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/uio.h>
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int64 io_sendfile(int64 s,int64 fd,uint64 off,uint64 n) {
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off_t sbytes;
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int r=sendfile(fd,s,off,n,0,&sbytes,0);
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if (r==-1)
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return (errno==EAGAIN?(sbytes?sbytes:-1):-3);
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return n;
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}
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#elif defined(HAVE_SENDFILE)
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#ifdef __hpux__
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#define _LARGEFILE64_SOURCE
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <sys/socket.h>
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int64 io_sendfile(int64 out,int64 in,uint64 off,uint64 bytes) {
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long long r=sendfile64(out,in,off,bytes,0,0);
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if (r==-1 && errno!=EAGAIN) r=-3;
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return r;
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}
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#elif defined (__sun__) && defined(__svr4__)
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#define _LARGEFILE64_SOURCE
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/sendfile.h>
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int64 io_sendfile(int64 out,int64 in,uint64 off,uint64 bytes) {
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off64_t o=off;
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long long r=sendfile64(out,in,&o,bytes);
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if (r==-1 && errno!=EAGAIN) r=-3;
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return r;
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}
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#elif defined(_AIX)
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#include <errno.h>
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int64 io_sendfile(int64 out,int64 in,uint64 off,uint64 bytes) {
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struct sf_parms p;
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int destfd=out;
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p.header_data=0;
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p.header_length=0;
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p.file_descriptor=in;
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p.file_offset=off;
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p.file_bytes=bytes;
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p.trailer_data=0;
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p.trailer_length=0;
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if (send_file(&destfd,&p,0)>=0)
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return p.bytes_sent;
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if (errno==EAGAIN)
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return -1;
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else
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return -3;
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}
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#elif defined(__linux__)
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#if defined(__GLIBC__)
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#include <sys/sendfile.h>
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#elif defined(__dietlibc__)
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#include <sys/sendfile.h>
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#else
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#include <linux/unistd.h>
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_syscall4(int,sendfile,int,out,int,in,long *,offset,unsigned long,count)
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#endif
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int64 io_sendfile(int64 s,int64 fd,uint64 off,uint64 n) {
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off_t o=off;
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io_entry* e=array_get(&io_fds,sizeof(io_entry),s);
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off_t i;
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uint64 done=0;
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/* What a spectacularly broken design for sendfile64.
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* The offset is 64-bit for sendfile64, but the count is not. */
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while (n) {
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off_t todo=n>0x7fffffff?0x7fffffff:n;
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i=sendfile(s,fd,&o,todo);
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if (i==todo) {
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done+=todo;
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n-=todo;
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if (n==0) return done;
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continue;
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} else if (i==-1) {
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if (e) {
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e->canwrite=0;
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e->next_write=-1;
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}
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return (errno==EAGAIN?-1:-3);
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} else
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return done+i;
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}
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return 0;
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}
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#endif
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#else
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#include <iob.h>
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#include <unistd.h>
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static int64 writecb(int64 s,const void* buf,uint64 n) {
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return write(s,buf,n);
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}
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int64 io_sendfile(int64 out,int64 in,uint64 off,uint64 bytes) {
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return io_mmapwritefile(out,in,off,bytes,writecb);
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}
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#endif
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