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59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
22 years ago
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#define _FILE_OFFSET_BITS 64
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#include "io_internal.h"
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#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
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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==0) return n;
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if (r==-1)
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return (errno==EAGAIN?sbytes:-1);
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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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return sendfile(s,fd,&o,n);
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}
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#else
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#define BUFSIZE 16384
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int64 io_sendfile(int64 out,int64 in,uint64 off,uint64 bytes) {
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char buf[BUFSIZE];
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int n,m;
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uint64 sent=0;
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if (lseek(in,off,SEEK_SET) != off)
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return -1;
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while (bytes>0) {
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char* tmp=buf;
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if ((n=read(in,tmp,(bytes<BUFSIZE)?bytes:BUFSIZE))<=0)
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return (sent?sent:-1);
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while (n>0) {
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if ((m=write(out,tmp,n))<0)
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goto abort;
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sent+=m;
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n-=m;
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tmp+=m;
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}
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}
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abort:
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return sent;
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}
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#endif
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