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Socket Programming file sending

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# 8  
Old 03-22-2011
I need to send one tar file from server to client.Is it possible to send the tar file dirctly without using buffer?????
If its not possible could you tell the possible method?
# 9  
Old 03-22-2011
"without using buffer" isn't even possible when using a socket and doesn't make much sense. At the very least the network card may have a buffer of its own, and the receiving end will have buffers that aren't under your control.

What are you actually trying to do? Why this requirement?
# 10  
Old 03-24-2011
Some operating systems support an optimized way to transfer data between file descriptors. It is the sendfile function.
This is the Linux/glibc prototype of the function:

PHP Code:
#include <sys/sendfile.h>

       ssize_t sendfile(int out_fd, int in_fd, off_t *offset, size_t count); 
but be adivised that (from the Linux senfile(2) man page):

Quote:
CONFORMING TO
Not specified in POSIX.1-2001, or other standards.

Other Unix systems implement sendfile() with different semantics and
prototypes. It should not be used in portable programs.
Using this function, you can send data from a file descriptor to a socket descriptor without using [ user space ] buffers.
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