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/*
Copyright (c) 1990-1999 Info-ZIP. All rights reserved.
See the accompanying file LICENSE, version 1999-Oct-05 or later
(the contents of which are also included in zip.h) for terms of use.
If, for some reason, both of these files are missing, the Info-ZIP license
also may be found at: ftp://ftp.cdrom.com/pub/infozip/license.html
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#define EXDEV 590
#define _sys_rename() _sc_140()
extern unsigned short _sys_rename(const char _far *oldfn, char *newfn);
/* rename a file. Report an error on cross disk renames */
static void _n_(const char* fn, char* bfn)
{
if (*fn != '.' && *fn != '/')
strcpy(bfn, "./");
else
*bfn = '\0';
strcat(bfn, fn);
}
int _rename(const char* old, const char* new)
{
char* p;
char* q;
char* r;
char olddrv, newdrv;
char dir[FILENAME_MAX];
short status;
char bold[FILENAME_MAX], bnew[FILENAME_MAX];
p = strrchr(old, ':');
q = strrchr(new, ':');
/* if at least one path includes a disk name, check for equality */
if (p != NULL || q != NULL) {
/* getcwd return a NULL pointer for /:S */
getcwd(dir, FILENAME_MAX);
r = strrchr(dir, ':');
if (p == NULL)
p = r;
olddrv = p ? p[1] : 'S';
if (q == NULL)
q = r;
newdrv = q ? q[1] : 'S';
/* return an error if uppercased disk names are not the same */
if ((old & ~0x20) != (new & ~0x20)) {
_errarg = NULL;
return errno = _errnum = EXDEV;
}
}
/* prepend ./ if there is no path to force rename to work on files
* in the current directory instead of default library
*/
_n_(old, bold);
_n_(new, bnew);
status = _sys_rename(bold, bnew);
/* can be :
* 0 no error
* 19 "old" file not found
* 44 "new" file already exist
* 45 "new" filename missing
* 46 "old" file name missing
*/
if (status) {
errno = _errnum = status;
_errarg = (status == 44 || status == 45) ? new : old;
}
return status;
}
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