lib/libutil/stat_flags.c

   1 /*      $NetBSD: stat_flags.c,v 1.2 2007/01/16 17:34:02 cbiere Exp $    */
   2
   3 /*-
   4  * Copyright (c) 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #if HAVE_NBTOOL_CONFIG_H
  33 #include "nbtool_config.h"
  34 #else
  35 #define HAVE_STRUCT_STAT_ST_FLAGS 1
  36 #endif
  37
  38 #include <sys/cdefs.h>
  39 #if !defined(lint)
  40 #if 0
  41 static char sccsid[] = "@(#)stat_flags.c        8.2 (Berkeley) 7/28/94";
  42 #else
  43 __RCSID("$NetBSD: stat_flags.c,v 1.2 2007/01/16 17:34:02 cbiere Exp $");
  44 #endif
  45 #endif /* not lint */
  46
  47 #include <sys/types.h>
  48 #include <sys/stat.h>
  49 #include <fts.h>
  50 #include <stddef.h>
  51 #include <string.h>
  52 #include <stdlib.h>
  53
  54 #include "util.h"
  55
  56 #define SAPPEND(s) do {                                                 \
  57         if (prefix != NULL)                                             \
  58                 (void)strlcat(string, prefix, sizeof(string));          \
  59         (void)strlcat(string, s, sizeof(string));                       \
  60         prefix = ",";                                                   \
  61 } while (/* CONSTCOND */ 0)
  62
  63 /*
  64  * flags_to_string --
  65  *      Convert stat flags to a comma-separated string.  If no flags
  66  *      are set, return the default string.
  67  */
  68 char *
  69 flags_to_string(u_long flags, const char *def)
  70 {
  71         char string[128];
  72         const char *prefix;
  73
  74         string[0] = '\0';
  75         prefix = NULL;
  76 #if HAVE_STRUCT_STAT_ST_FLAGS
  77         if (flags & UF_APPEND)
  78                 SAPPEND("uappnd");
  79         if (flags & UF_IMMUTABLE)
  80                 SAPPEND("uchg");
  81         if (flags & UF_NODUMP)
  82                 SAPPEND("nodump");
  83         if (flags & UF_OPAQUE)
  84                 SAPPEND("opaque");
  85         if (flags & SF_APPEND)
  86                 SAPPEND("sappnd");
  87         if (flags & SF_ARCHIVED)
  88                 SAPPEND("arch");
  89         if (flags & SF_IMMUTABLE)
  90                 SAPPEND("schg");
  91 #ifdef SF_SNAPSHOT
  92         if (flags & SF_SNAPSHOT)
  93                 SAPPEND("snap");
  94 #endif
  95 #endif
  96         if (prefix != NULL)
  97                 return strdup(string);
  98         return strdup(def);
  99 }
 100
 101 #define TEST(a, b, f) {                                                 \
 102         if (!strcmp(a, b)) {                                            \
 103                 if (clear) {                                            \
 104                         if (clrp)                                       \
 105                                 *clrp |= (f);                           \
 106                         if (setp)                                       \
 107                                 *setp &= ~(f);                          \
 108                 } else {                                                \
 109                         if (setp)                                       \
 110                                 *setp |= (f);                           \
 111                         if (clrp)                                       \
 112                                 *clrp &= ~(f);                          \
 113                 }                                                       \
 114                 break;                                                  \
 115         }                                                               \
 116 }
 117
 118 /*
 119  * string_to_flags --
 120  *      Take string of arguments and return stat flags.  Return 0 on
 121  *      success, 1 on failure.  On failure, stringp is set to point
 122  *      to the offending token.
 123  */
 124 int
 125 string_to_flags(char **stringp, u_long *setp, u_long *clrp)
 126 {
 127         int clear;
 128         char *string, *p;
 129
 130         if (setp)
 131                 *setp = 0;
 132         if (clrp)
 133                 *clrp = 0;
 134
 135 #if HAVE_STRUCT_STAT_ST_FLAGS
 136         string = *stringp;
 137         while ((p = strsep(&string, "\t ,")) != NULL) {
 138                 clear = 0;
 139                 *stringp = p;
 140                 if (*p == '\0')
 141                         continue;
 142                 if (p[0] == 'n' && p[1] == 'o') {
 143                         clear = 1;
 144                         p += 2;
 145                 }
 146                 switch (p[0]) {
 147                 case 'a':
 148                         TEST(p, "arch", SF_ARCHIVED);
 149                         TEST(p, "archived", SF_ARCHIVED);
 150                         return (1);
 151                 case 'd':
 152                         clear = !clear;
 153                         TEST(p, "dump", UF_NODUMP);
 154                         return (1);
 155                 case 'n':
 156                                 /*
 157                                  * Support `nonodump'. Note that
 158                                  * the state of clear is not changed.
 159                                  */
 160                         TEST(p, "nodump", UF_NODUMP);
 161                         return (1);
 162                 case 'o':
 163                         TEST(p, "opaque", UF_OPAQUE);
 164                         return (1);
 165                 case 's':
 166                         TEST(p, "sappnd", SF_APPEND);
 167                         TEST(p, "sappend", SF_APPEND);
 168                         TEST(p, "schg", SF_IMMUTABLE);
 169                         TEST(p, "schange", SF_IMMUTABLE);
 170                         TEST(p, "simmutable", SF_IMMUTABLE);
 171                         return (1);
 172                 case 'u':
 173                         TEST(p, "uappnd", UF_APPEND);
 174                         TEST(p, "uappend", UF_APPEND);
 175                         TEST(p, "uchg", UF_IMMUTABLE);
 176                         TEST(p, "uchange", UF_IMMUTABLE);
 177                         TEST(p, "uimmutable", UF_IMMUTABLE);
 178                         return (1);
 179                 default:
 180                         return (1);
 181                 }
 182         }
 183 #endif
 184
 185         return (0);
 186 }