source: trunk/src/emx/src/lib/sys/__chdir.c@ 1326

/* sys/chdir.c (emx+gcc) -- Copyright (c) 1992-1996 by Eberhard Mattes
                         -- Copyright (c) 2003-2004 by knut st. osmundsen */

#include "libc-alias.h"
#define INCL_FSMACROS
#include <os2emx.h>
#include <stdlib.h>
#include <errno.h>
#include <emx/syscalls.h>
#include "syscalls.h"
#define __LIBC_LOG_GROUP __LIBC_LOG_GRP_BACK_IO
#include <InnoTekLIBC/logstrict.h>
#include <InnoTekLIBC/pathrewrite.h>


int __chdir (const char *pszPath)
{
    LIBCLOG_ENTER("pszPath=%s\n", pszPath);
    ULONG   rc;
    int     cch;
    FS_VAR();

    /*
     * Rewrite the specified file path.
     */
    cch = __libc_PathRewrite(pszPath, NULL, 0);
    if (cch > 0)
    {
        char *pszRewritten = alloca(cch);
        if (!pszRewritten)
        {
            errno = ENOMEM;
            LIBCLOG_RETURN_INT(-1);
        }
        cch = __libc_PathRewrite(pszPath, pszRewritten, cch);
        if (cch > 0)
            pszPath = pszRewritten;
        /* else happens when someone changes the rules between the two calls. */
        else if (cch < 0)
        {
            errno = EAGAIN;             /* non-standard, I'm sure. */
            LIBCLOG_RETURN_INT(-1);
        }
    }

    /*
     * Change the current directory.
     */
    FS_SAVE_LOAD();
    rc = DosSetCurrentDir((PCSZ)pszPath);
    FS_RESTORE();
    if (rc != 0)
    {
        _sys_set_errno(rc);
        LIBCLOG_RETURN_INT(-1);

    }
    LIBCLOG_RETURN_INT(0);
}