Program name: Difference between revisions

=== Windows ===

[http://msdn.microsoft.com/en-us/library/ms683197%28v=VS.85%29.aspx GetModuleFileName], from the Win32 API, provides the correct path to the current executable file.

{{libheader|Win32}}

<lang c>#include <windows.h>

#include <stdlib.h>

#include <wchar.h>

/*

* Returns the path to the current executable file, in a newly

* allocated buffer. Use free() to free it.

*/

wchar_t *

exepath(void)

{

wchar_t *buf, *newbuf;

long blen, flen;

/*

* Most paths fit in MAX_PATH == 260 characters, but very

* long UNC paths might require a larger buffer.

*/

buf = NULL;

for (blen = MAX_PATH; 1; blen += MAX_PATH) {

/* Enlarge buffer. */

newbuf = realloc(buf, blen * sizeof buf[0]);

if (newbuf == NULL) {

free(buf);

return NULL;

}

buf = newbuf;

flen = GetModuleFileNameW(NULL, buf, blen);

if (flen == 0) {

free(buf);

return NULL;

}

if (flen < blen)

return buf;

}

}

/*

* Print the path to this executable.

*/

int

main()

{

wchar_t *path;

path = exepath();

if (path == NULL) {

wprintf(L"Sorry, an error occured.\n");

return 1;

}

wprintf(L"Path to executable: %ls\n", path);

free(path);

return 0;

}</lang>

<pre>Path to executable: C:\Users\kernigh\Documents\field\scratch.exe</pre>