uu_ident.c

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    1 /*
    2  * CDDL HEADER START
    3  *
    4  * The contents of this file are subject to the terms of the
    5  * Common Development and Distribution License, Version 1.0 only
    6  * (the "License").  You may not use this file except in compliance
    7  * with the License.
    8  *
    9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   10  * or https://opensource.org/licenses/CDDL-1.0.
   11  * See the License for the specific language governing permissions
   12  * and limitations under the License.
   13  *
   14  * When distributing Covered Code, include this CDDL HEADER in each
   15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
   16  * If applicable, add the following below this CDDL HEADER, with the
   17  * fields enclosed by brackets "[]" replaced with your own identifying
   18  * information: Portions Copyright [yyyy] [name of copyright owner]
   19  *
   20  * CDDL HEADER END
   21  */
   22 /*
   23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
   24  * Use is subject to license terms.
   25  */
   26 
   27 
   28 
   29 #include "libuutil_common.h"
   30 
   31 #include <string.h>
   32 
   33 /*
   34  * We require names of the form:
   35  *      [provider,]identifier[/[provider,]identifier]...
   36  *
   37  * Where provider is either a stock symbol (SUNW) or a java-style reversed
   38  * domain name (com.sun).
   39  *
   40  * Both providers and identifiers must start with a letter, and may
   41  * only contain alphanumerics, dashes, and underlines.  Providers
   42  * may also contain periods.
   43  *
   44  * Note that we do _not_ use the macros in <ctype.h>, since they are affected
   45  * by the current locale settings.
   46  */
   47 
   48 #define IS_ALPHA(c) \
   49         (((c) >= 'a' && (c) <= 'z') || ((c) >= 'A' && (c) <= 'Z'))
   50 
   51 #define IS_DIGIT(c) \
   52         ((c) >= '' && (c) <= '9')
   53 
   54 static int
   55 is_valid_ident(const char *s, const char *e, int allowdot)
   56 {
   57         char c;
   58 
   59         if (s >= e)
   60                 return (0);             /* name is empty */
   61 
   62         c = *s++;
   63         if (!IS_ALPHA(c))
   64                 return (0);             /* does not start with letter */
   65 
   66         while (s < e && (c = *s++) != 0) {
   67                 if (IS_ALPHA(c) || IS_DIGIT(c) || c == '-' || c == '_' ||
   68                     (allowdot && c == '.'))
   69                         continue;
   70                 return (0);             /* invalid character */
   71         }
   72         return (1);
   73 }
   74 
   75 static int
   76 is_valid_component(const char *b, const char *e, uint_t flags)
   77 {
   78         char *sp;
   79 
   80         if (flags & UU_NAME_DOMAIN) {
   81                 sp = strchr(b, ',');
   82                 if (sp != NULL && sp < e) {
   83                         if (!is_valid_ident(b, sp, 1))
   84                                 return (0);
   85                         b = sp + 1;
   86                 }
   87         }
   88 
   89         return (is_valid_ident(b, e, 0));
   90 }
   91 
   92 int
   93 uu_check_name(const char *name, uint_t flags)
   94 {
   95         const char *end = name + strlen(name);
   96         const char *p;
   97 
   98         if (flags & ~(UU_NAME_DOMAIN | UU_NAME_PATH)) {
   99                 uu_set_error(UU_ERROR_UNKNOWN_FLAG);
  100                 return (-1);
  101         }
  102 
  103         if (!(flags & UU_NAME_PATH)) {
  104                 if (!is_valid_component(name, end, flags))
  105                         goto bad;
  106                 return (0);
  107         }
  108 
  109         while ((p = strchr(name, '/')) != NULL) {
  110                 if (!is_valid_component(name, p - 1, flags))
  111                         goto bad;
  112                 name = p + 1;
  113         }
  114         if (!is_valid_component(name, end, flags))
  115                 goto bad;
  116 
  117         return (0);
  118 
  119 bad:
  120         uu_set_error(UU_ERROR_INVALID_ARGUMENT);
  121         return (-1);
  122 }

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FreeBSD/Linux Kernel Cross Reference sys/contrib/openzfs/lib/libuutil/uu_ident.c

FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/lib/libuutil/uu_ident.c