gen/strtofflags.c

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