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58 lines
1.2 KiB
58 lines
1.2 KiB
#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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