gen/strtofflags.c

   1 /*
   2  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*-
  26  * Copyright (c) 1993
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58 #ifndef lint
  59 #if 0
  60 static char sccsid[] = "@(#)stat_flags.c        8.1 (Berkeley) 5/31/93";
  61 #else
  62 static const char rcsid[] =
  63   "$FreeBSD: src/lib/libc/gen/strtofflags.c,v 1.18.2.1 2000/06/28 01:52:24 joe Exp $";
  64 #endif
  65 #endif /* not lint */
  66
  67 #include <sys/types.h>
  68 #include <sys/stat.h>
  69
  70 #include <stddef.h>
  71 #include <stdlib.h>
  72 #include <string.h>
  73
  74 static struct {
  75         char *name;
  76         u_long flag;
  77         int invert;
  78 } mapping[] = {
  79         /* shorter names per flag first, all prefixed by "no" */
  80         { "nosappnd",           SF_APPEND,      0 },
  81         { "nosappend",          SF_APPEND,      0 },
  82         { "noarch",             SF_ARCHIVED,    0 },
  83         { "noarchived",         SF_ARCHIVED,    0 },
  84         { "noschg",             SF_IMMUTABLE,   0 },
  85         { "noschange",          SF_IMMUTABLE,   0 },
  86         { "nosimmutable",       SF_IMMUTABLE,   0 },
  87         { "nouappnd",           UF_APPEND,      0 },
  88         { "nouappend",          UF_APPEND,      0 },
  89         { "nouchg",             UF_IMMUTABLE,   0 },
  90         { "nouchange",          UF_IMMUTABLE,   0 },
  91         { "nouimmutable",       UF_IMMUTABLE,   0 },
  92         { "nodump",             UF_NODUMP,      1 },
  93         { "noopaque",           UF_OPAQUE,      0 },
  94 };
  95 #define longestflaglen  12
  96 #define nmappings       (sizeof(mapping) / sizeof(mapping[0]))
  97
  98 /*
  99  * fflagstostr --
 100  *      Convert file flags to a comma-separated string.  If no flags
 101  *      are set, return the empty string.
 102  */
 103 char *
 104 fflagstostr(flags)
 105         u_long flags;
 106 {
 107         char *string;
 108         char *sp, *dp;
 109         u_long setflags;
 110         int i;
 111
 112         if ((string = (char *)malloc(nmappings * (longestflaglen + 1))) == NULL)
 113                 return (NULL);
 114
 115         setflags = flags;
 116         dp = string;
 117         for (i = 0; i < nmappings; i++) {
 118                 if (setflags & mapping[i].flag) {
 119                         if (dp > string)
 120                                 *dp++ = ',';
 121                         for (sp = mapping[i].invert ? mapping[i].name :
 122                             mapping[i].name + 2; *sp; *dp++ = *sp++) ;
 123                         setflags &= ~mapping[i].flag;
 124                 }
 125         }
 126         *dp = '\0';
 127         return (string);
 128 }
 129
 130 /*
 131  * strtofflags --
 132  *      Take string of arguments and return file flags.  Return 0 on
 133  *      success, 1 on failure.  On failure, stringp is set to point
 134  *      to the offending token.
 135  */
 136 int
 137 strtofflags(stringp, setp, clrp)
 138         char **stringp;
 139         u_long *setp, *clrp;
 140 {
 141         char *string, *p;
 142         int i;
 143
 144         if (setp)
 145                 *setp = 0;
 146         if (clrp)
 147                 *clrp = 0;
 148         string = *stringp;
 149         while ((p = strsep(&string, "\t ,")) != NULL) {
 150                 *stringp = p;
 151                 if (*p == '\0')
 152                         continue;
 153                 for (i = 0; i < nmappings; i++) {
 154                         if (strcmp(p, mapping[i].name + 2) == 0) {
 155                                 if (mapping[i].invert) {
 156                                         if (clrp)
 157                                                 *clrp |= mapping[i].flag;
 158                                 } else {
 159                                         if (setp)
 160                                                 *setp |= mapping[i].flag;
 161                                 }
 162                                 break;
 163                         } else if (strcmp(p, mapping[i].name) == 0) {
 164                                 if (mapping[i].invert) {
 165                                         if (setp)
 166                                                 *setp |= mapping[i].flag;
 167                                 } else {
 168                                         if (clrp)
 169                                                 *clrp |= mapping[i].flag;
 170                                 }
 171                                 break;
 172                         }
 173                 }
 174                 if (i == nmappings)
 175                         return 1;
 176         }
 177         return 0;
 178 }