cmd/3d/mkdir3d.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1989-2011 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                 Eclipse Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*          http://www.eclipse.org/org/documents/epl-v10.html           *
*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
*                                                                      *
*              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

#if defined(__STDPP__directive) && defined(__STDPP__hide)
__STDPP__directive pragma pp:hide mkdir
#else
#define mkdir        ______mkdir
#endif
#define _def_syscall_3d 1
#define _LS_H       1

#include "3d.h"

#undef  _def_syscall_3d
#if defined(__STDPP__directive) && defined(__STDPP__hide)
__STDPP__directive pragma pp:nohide mkdir
#else
#undef  mkdir
#endif

#include "FEATURE/syscall"

/*
 * mkdir() will always create a directory on the highest layer
 * mkdir() will create intermediate directories if they virtually exist
 * mkdir() will do a chdir() if a virtual dot directory is created
 */

int
mkdir3d(const char* path, mode_t mode)
{
    register char*  sp;
    register char*  cp;
    register int    r;
    char        buf[PATH_MAX + 1];
    char        tmp[PATH_MAX + 1];
#if FS
    Mount_t*    mp;
#endif

    if (state.real)
    {
#if FS
        mp = 0;
#endif
        sp = (char*)path;
    }
#if FS
    else if (!fscall(NiL, MSG_mkdir, 0, path, mode))
        return(state.ret);
#endif
    else
    {
#if FS
        mp = monitored();
#endif
        if (!(sp = pathreal(path, P_PATHONLY|P_NOOPAQUE, NiL)))
            return(-1);
    }
    if (state.path.level || state.level && (sp == state.pwd || streq(sp, state.pwd)) || (r = MKDIR(sp, mode)) && errno == ENOENT)
    {
        /*
         * copy canonicalized pathname into buf
         */

        if (*sp != '/')
            sp = state.path.name;
        for (cp = buf; *cp = *sp++; cp++);
        if (!state.real)
        {
            /*
             * create intermediate dirs if they exist in lower view
             */

            char*   a;
            char*   b;
            Path_t  save;
            int oerrno;

            a = tmp;
            b = buf;
            while (*a++ = *b++);
            if (b = strrchr(tmp, '/'))
                *b = 0;
            oerrno = errno;
            save = state.path;
            for (;;)
                if (!pathnext(tmp, NiL, NiL) || ACCESS(tmp, F_OK))
                {
                    state.path = save;
                    errno = oerrno;
                    return -1;
                }
            state.path = save;
            errno = oerrno;
        }

        /*
         * ok to create intermediate dirs
         */

        do
        {
            while (*--cp != '/');
            if (cp <= buf) return(-1);
            *cp = 0;
            r = !pathreal(buf, 0, NiL) || !streq(buf, state.path.name);
            *cp = '/';
        } while (r);
        *cp = '/';
        do
        {
            r = *++cp;
            if (r == 0 || r == '/')
            {
                *cp = 0;
                sp = pathreal(buf, P_PATHONLY, NiL);
                *cp = r;
                if (!sp) return(-1);
                if (sp == state.dot) sp = state.pwd;
                if (r = MKDIR(sp, r ? (mode|S_IWUSR|S_IXUSR) : mode)) return(r);
#if FS
                if (fsmonitored(state.path.name) && !LSTAT(state.path.name, &state.path.st))
                    fscall(state.path.monitor, MSG_mkdir, 0, state.path.name, state.path.st.st_mode);
#endif
                if (sp == state.pwd || streq(sp, state.pwd))
                {
                    state.level = 0;
                    CHDIR(state.pwd);
                }
            }
        } while (*cp);
    }
#if FS
    if (!r)
    {
        if (mp) fscall(mp, MSG_mkdir, 0, path, mode);
        for (mp = state.global; mp; mp = mp->global)
            if (fssys(mp, MSG_mkdir))
                fscall(mp, MSG_mkdir, 0, path, mode);
    }
#endif
    return(r);
}

/*
 * 3d internal mkdir to skip pathreal(path, ...)
 */

int
fs3d_mkdir(const char* path, mode_t mode)
{
    int r;

    state.real++;
    r = mkdir(path, mode);
    state.real--;
    return(r);
}