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chdir3d.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1989-2007 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Eduardo Krell <ekrell@adexus.cl>                   *
*                                                                      *
***********************************************************************/
#pragma prototyped

#include "3d.h"

int
chdir3d(const char* path)
{
      register char*    sp;
      char        buf[PATH_MAX + 1];

#if FS
      if (!fscall(NiL, MSG_stat, 0, path, &state.path.st))
      {
            if (state.ret)
                  return -1;
            if (!S_ISDIR(state.path.st.st_mode))
            {
                  errno = ENOTDIR;
                  return -1;
            }
            state.level = 1;
      }
      else
#else
      initialize();
#endif
      {
            if (state.level > 0 && state.pwd && !CHDIR(state.pwd))
                  state.level = 0;
            if (!(sp = pathreal(path, P_SAFE, NiL)))
                  return -1;
            if (CHDIR(sp))
                  return -1;
      }
      if (state.pwd)
      {
            /*
             * save absolute path in state.pwd
             */

            if (*path != '/')
            {
                  strcpy(buf, state.pwd);
                  sp = buf + state.pwdsize;
                  *sp++ = '/';
            }
            else
                  sp = buf;
            strcpy(sp, path);
#if 0
            state.path.level = 0;
#endif
            if ((sp = pathcanon(buf, 0)) && *(sp - 1) == '.' && *(sp - 2) == '/')
                  *(sp -= 2) = 0;
            state.pwdsize = strcopy(state.pwd, buf) - state.pwd;
            memcpy(state.envpwd + sizeof(var_pwd) - 1, state.pwd, state.pwdsize);
            state.level = state.path.level;
            message((-1, "chdir: %s [%d]", state.pwd, state.level));
      }
      return 0;
}

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