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/* libjodycode: link() stdio call
*
* Copyright (C) 2014-2026 by Jody Bruchon <jody@jodybruchon.com>
* Released under The MIT License
*/
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include "likely_unlikely.h"
#include "libjodycode.h"
#ifdef UNICODE
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif
/* Hard link a file, converting for Windows if necessary */
int jc_link(const char *path1, const char *path2)
{
int retval = 0;
#ifdef UNICODE
JC_WCHAR_T *widename1, *widename2;
#endif
if (unlikely(path1 == NULL || path2 == NULL)) {
jc_errno = EFAULT;
return -1;
}
#ifdef ON_WINDOWS
#ifdef UNICODE
if (jc_string_to_wstring(path1, &widename1) != 0 || jc_string_to_wstring(path2, &widename2) != 0) {
jc_errno = ENOMEM;
return -1;
}
if (CreateHardLinkW((LPCWSTR)widename2, (LPCWSTR)widename1, NULL) == 0) retval = -1;
free(widename1); free(widename2);
#else
if (CreateHardLink(path2, path1, NULL) == 0) retval = -1;
#endif /* UNICODE */
if (retval != 0) jc_errno = jc_GetLastError();
#else
retval = link(path1, path2);
if (retval != 0) jc_errno = errno;
#endif /* ON_WINDOWS */
return retval;
}
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