n_openrfile() n_closerfile() n_rread() n_rwrite() n_rseek() - Network file manipulation

SYNOPSIS

#include "napi3.h"
RFILE *n_closerfile(SERVER *se,RFILE *rf)
RFILE *n_openrfile(SERVER *se,str fn,str mode)
int    n_rread(SERVER *se,RFILE *rf,char *buf,int n)
int    n_rwrite(SERVER *se,RFILE *rf,char *buf,int n)
long   n_rseek(SERVER *se,RFILE *rf,long off,int where)


DESCRIPTION
The file manipulation functions perform remote versions of the familiar fopen(3), fclose(3), read(3) write(3) and

seek(3) functions.

The obvious purpose for these routines is to provide you with the ability to do remotely that which you normally do locally when processing files.

n_openrfile()

is passed the obligatory SERVER *, the name of the file to be opened, and I/O mode of operation . It returns an RFILE * if all is well or an RFILEPN on error. It is only safe to open file-names that were obtained by n_getls(), or the results of a hit callback from a search. This is because the server's view of the world may be quite different from that of the client.

n_closerfile()

is passed a SERVER * and an open RFILE *. It will close the file both locally and remotely.

n_rread()

works more like read() instead of fread() because there is absolutely no point in a sizeof parameter.

n_rwrite()

works more like write() instead of fwrite() because there is absolutely no point in a sizeof parameter.

n_rseek()

works like lseek() to reposition the read/write pointer in an open file.

Everything that applies to the normal versions of these functions applies to the remote file routines. The big difference is that the functions use an RFILE * instead of an int as the int file handle or FILE *.


CAVEATS
The byte ordering may not be the same on the server as it is on the client.


Copyright © Thunderstone Software     Last updated: Dec 10 2018
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