Guys,
Here's a well tested piece of code for replacing the calls to
'system(mv)' in htfuzzy/EndingsDB.cc & htfuzzy/Synonym.cc
Example Useage:
file_copy(root2word.get(), config["endings_root2word_db"].get(),
FILECOPY_OVERWRITE_ON);
unlink(root2word.get());
returns TRUE or FALSE
By well tested I mean shipping and executing tens, if not hundreds, of
thousands of times a day in our code.
Works across file systems in Linux, Solaris, FreeBSD & Windows NT 4.0, &
Windows 2000, and probably many others.
Note that each system defines BUFSIZ to be optimal in its libc header
files.
Thanks.
--
Neal Richter
Knowledgebase Developer
RightNow Technologies, Inc.
Customer Service for Every Web Site
//
// filecopy.c
//
// Copies files from one file to another.
//
//
// Part of the ht://Dig package <http://www.htdig.org/>
// Copyright (c) 1995-2001 The ht://Dig Group
// For copyright details, see the file COPYING in your distribution
// or the GNU Public License version 2 or later
// <http://www.gnu.org/copyleft/gpl.html>
//
// Copyright (c) 2002 RightWow Technologies, Inc.
// Donated to The ht://Dig Group
#include <stdio.h>
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#else /* UNIX */
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#endif /* _WIN32 | UNIX */
#include "filecopy.h"
//----------------------------------------------------------------------
// int file_copy (char * from, char * to, char flags)
//----------------------------------------------------------------------
//
// copy file 'from' -> 'to'
//
// set flags to FILECOPY_OVERWRITE_ON to overwrite the 'to' file if
// it exists
//
// set flags to FILECOPY_OVERWRITE_OFF to not overwrite the 'to' file
// if it exists
//
// returns 0/FALSE if unsucessful
// returns 1/TRUE if sucessful
//
//
#ifdef _WIN32
DLLEXPORT int file_copy (char * from, char * to, char flags)
{
if (flags == FILECOPY_OVERWRITE_ON)
{
//overwrite
if (TRUE != (CopyFile(from , to, FALSE)))
return (FALSE);
}
else if (flags == FILECOPY_OVERWRITE_OFF)
{
//don't overwrite
if (TRUE != (CopyFile(from , to, TRUE)))
return (FALSE);
}
else //bad flag
{
return (FALSE);
}
return (TRUE);
}
#else //UNIX
int file_copy (char * from, char * to, char flags)
{
int nmemb;
FILE *ifp, *ofp;
char buf[BUFSIZ];
if (flags == FILECOPY_OVERWRITE_OFF) {
if (access(to, F_OK) == 0) {
//OUTLOG((FUNC, TRWRN, "file %s already exists\n", to));
return(FALSE);
}
else if (errno != ENOENT) {
//OUTLOG((FUNC, TRERR, "access(%s, F_OK) failed\n", to));
return(FALSE);
}
}
if ((ifp=fopen(from, "r")) == NULL) {
//OUTLOG((FUNC, TRERR, "%s doesn't exist\n", from));
return(FALSE);
}
if ((ofp=fopen(to, "w+")) == NULL) {
//OUTLOG((FUNC, TRERR, "can't create %s\n", to));
fclose(ifp);
return(FALSE);
}
while ((nmemb=fread(buf, 1, sizeof(buf), ifp)) > 0) {
if (fwrite(buf, 1, nmemb, ofp) != nmemb) {
//OUTLOG((FUNC, TRERR, "fwrite failed\n"));
fclose(ifp);
fclose(ofp);
return(FALSE);
}
}
fclose(ifp);
fclose(ofp);
return (TRUE);
}
#endif /* _WIN32 | UNIX */
//
// filecopy.h
//
// Copies files from one file to another.
//
//
// Part of the ht://Dig package <http://www.htdig.org/>
// Copyright (c) 1995-2001 The ht://Dig Group
// For copyright details, see the file COPYING in your distribution
// or the GNU Public License version 2 or later
// <http://www.gnu.org/copyleft/gpl.html>
//
// Copyright (c) 2002 RightWow Technologies, Inc.
// Donated to The ht://Dig Group
#ifndef FILECOPY_H
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE 1
#endif
#define FILECOPY_OVERWRITE_ON 1
#define FILECOPY_OVERWRITE_OFF 2
int file_copy (char * from, char * to, char flags);
#endif /* FILECOPY_H */
