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unlink3d.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*           Copyright (c) 1989-2007 AT&T Knowledge Ventures            *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                      by AT&T Knowledge Ventures                      *
*                                                                      *
*                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
unlink3d(register const char* path)
{
      register char*    sp;
      register int      r;
#if FS
      Mount_t*    mp;

      if (!fscall(NiL, MSG_remove, 0, path))
            return state.ret;
      mp = monitored();
#endif
      if (!(sp = pathreal(path, P_PATHONLY|P_SAFE, NiL)))
            return -1;
      if (state.path.level)
            return 0;
      if (!(r = LSTAT(sp, &state.path.st)))
      {
            if (S_ISLNK(state.path.st.st_mode) && !checklink(sp, &state.path.st, P_PATHONLY|P_LSTAT) && state.path.linksize > 0)
            {
                  /*
                   * remove instance if not default
                   */

                  r = strlen(sp) - (sizeof(state.vdefault) - 1);
                  if (r > 3 && streq(sp + r, state.vdefault))
                        return 0;
            }
            r = UNLINK(sp);
      }
      if (!r)
      {
#if FS
            if (mp)
                  fscall(mp, MSG_remove, 0, path);
            for (mp = state.global; mp; mp = mp->global)
                  if (fssys(mp, MSG_remove))
                        fscall(mp, MSG_remove, 0, path);
#endif
      }
      else if (errno == ENOENT && pathreal(path, 0, NiL))
            r = 0;
      return r;
}

#undef      remove

int
remove(const char* path)
{
      return unlink(path);
}

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