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stat_flags.c

/**   $MirOS: src/usr.sbin/makefs/nbsrc/lib/libutil/stat_flags.c,v 1.2 2008/10/31 21:24:25 tg Exp $ */
/*    $NetBSD: stat_flags.c,v 1.2 2007/01/16 17:34:02 cbiere Exp $      */

/*-
 * Copyright (c) 1993
 *    The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#else
#define HAVE_STRUCT_STAT_ST_FLAGS 1
#endif

#ifdef __MirBSD__
#include "mbsdtree.h"
#endif

#include <sys/cdefs.h>
#if !defined(lint)
#if 0
static char sccsid[] = "@(#)stat_flags.c  8.2 (Berkeley) 7/28/94";
#else
__RCSID("$NetBSD: stat_flags.c,v 1.2 2007/01/16 17:34:02 cbiere Exp $");
__IDSTRING(mbsdid, "$MirOS: src/usr.sbin/makefs/nbsrc/lib/libutil/stat_flags.c,v 1.2 2008/10/31 21:24:25 tg Exp $");
#endif
#endif /* not lint */

#include <sys/types.h>
#include <sys/stat.h>
#include <fts.h>
#include <stddef.h>
#include <string.h>
#include <stdlib.h>

#include "util.h"

#define     SAPPEND(s) do {                                       \
      if (prefix != NULL)                                   \
            (void)strlcat(string, prefix, sizeof(string));        \
      (void)strlcat(string, s, sizeof(string));             \
      prefix = ",";                                         \
} while (/* CONSTCOND */ 0)

/*
 * flags_to_string --
 *    Convert stat flags to a comma-separated string.  If no flags
 *    are set, return the default string.
 */
char *
flags_to_string(u_long flags, const char *def)
{
      char string[128];
      const char *prefix;

      string[0] = '\0';
      prefix = NULL;
#if HAVE_STRUCT_STAT_ST_FLAGS
      if (flags & UF_APPEND)
            SAPPEND("uappnd");
      if (flags & UF_IMMUTABLE)
            SAPPEND("uchg");
      if (flags & UF_NODUMP)
            SAPPEND("nodump");
      if (flags & UF_OPAQUE)
            SAPPEND("opaque");
      if (flags & SF_APPEND)
            SAPPEND("sappnd");
      if (flags & SF_ARCHIVED)
            SAPPEND("arch");
      if (flags & SF_IMMUTABLE)
            SAPPEND("schg");
#ifdef SF_SNAPSHOT
      if (flags & SF_SNAPSHOT)
            SAPPEND("snap");
#endif
#endif
      if (prefix != NULL)
            return strdup(string);
      return strdup(def);
}

#define     TEST(a, b, f) {                                       \
      if (!strcmp(a, b)) {                                  \
            if (clear) {                                    \
                  if (clrp)                           \
                        *clrp |= (f);                       \
                  if (setp)                           \
                        *setp &= ~(f);                      \
            } else {                                  \
                  if (setp)                           \
                        *setp |= (f);                       \
                  if (clrp)                           \
                        *clrp &= ~(f);                      \
            }                                         \
            break;                                          \
      }                                               \
}

/*
 * string_to_flags --
 *    Take string of arguments and return stat flags.  Return 0 on
 *    success, 1 on failure.  On failure, stringp is set to point
 *    to the offending token.
 */
int
string_to_flags(char **stringp, u_long *setp, u_long *clrp)
{
      int clear;
      char *string, *p;

      if (setp)
            *setp = 0;
      if (clrp)
            *clrp = 0;

#if HAVE_STRUCT_STAT_ST_FLAGS
      string = *stringp;
      while ((p = strsep(&string, "\t ,")) != NULL) {
            clear = 0;
            *stringp = p;
            if (*p == '\0')
                  continue;
            if (p[0] == 'n' && p[1] == 'o') {
                  clear = 1;
                  p += 2;
            }
            switch (p[0]) {
            case 'a':
                  TEST(p, "arch", SF_ARCHIVED);
                  TEST(p, "archived", SF_ARCHIVED);
                  return (1);
            case 'd':
                  clear = !clear;
                  TEST(p, "dump", UF_NODUMP);
                  return (1);
            case 'n':
                        /*
                         * Support `nonodump'. Note that
                         * the state of clear is not changed.
                         */
                  TEST(p, "nodump", UF_NODUMP);
                  return (1);
            case 'o':
                  TEST(p, "opaque", UF_OPAQUE);
                  return (1);
            case 's':
                  TEST(p, "sappnd", SF_APPEND);
                  TEST(p, "sappend", SF_APPEND);
                  TEST(p, "schg", SF_IMMUTABLE);
                  TEST(p, "schange", SF_IMMUTABLE);
                  TEST(p, "simmutable", SF_IMMUTABLE);
                  return (1);
            case 'u':
                  TEST(p, "uappnd", UF_APPEND);
                  TEST(p, "uappend", UF_APPEND);
                  TEST(p, "uchg", UF_IMMUTABLE);
                  TEST(p, "uchange", UF_IMMUTABLE);
                  TEST(p, "uimmutable", UF_IMMUTABLE);
                  return (1);
            default:
                  return (1);
            }
      }
#endif

      return (0);
}

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