bin/ls/stat_flags.c

   1 /*-
   2  * Copyright (c) 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 static char sccsid[] = "@(#)stat_flags.c        8.1 (Berkeley) 5/31/93";
  36 #endif /* not lint */
  37
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40
  41 #include <stddef.h>
  42 #include <string.h>
  43
  44 #define SAPPEND(s) {                                                    \
  45         if (prefix != NULL)                                             \
  46                 (void)strcat(string, prefix);                           \
  47         (void)strcat(string, s);                                        \
  48         prefix = ",";                                                   \
  49 }
  50
  51 /*
  52  * flags_to_string --
  53  *      Convert stat flags to a comma-separated string.  If no flags
  54  *      are set, return the default string.
  55  */
  56 char *
  57 flags_to_string(flags, def)
  58         u_long flags;
  59         char *def;
  60 {
  61         static char string[128];
  62         char *prefix;
  63
  64         string[0] = '\0';
  65         prefix = NULL;
  66         if (flags & UF_APPEND)
  67                 SAPPEND("uappnd");
  68         if (flags & UF_IMMUTABLE)
  69                 SAPPEND("uchg");
  70         if (flags & UF_NODUMP)
  71                 SAPPEND("nodump");
  72         if (flags & SF_APPEND)
  73                 SAPPEND("sappnd");
  74         if (flags & SF_ARCHIVED)
  75                 SAPPEND("arch");
  76         if (flags & SF_IMMUTABLE)
  77                 SAPPEND("schg");
  78         return (prefix == NULL && def != NULL ? def : string);
  79 }
  80
  81 #define TEST(a, b, f) {                                                 \
  82         if (!memcmp(a, b, sizeof(b))) {                                 \
  83                 if (clear) {                                            \
  84                         if (clrp)                                       \
  85                                 *clrp |= (f);                           \
  86                 } else if (setp)                                        \
  87                         *setp |= (f);                                   \
  88                 break;                                                  \
  89         }                                                               \
  90 }
  91
  92 /*
  93  * string_to_flags --
  94  *      Take string of arguments and return stat flags.  Return 0 on
  95  *      success, 1 on failure.  On failure, stringp is set to point
  96  *      to the offending token.
  97  */
  98 int
  99 string_to_flags(stringp, setp, clrp)
 100         char **stringp;
 101         u_long *setp, *clrp;
 102 {
 103         int clear;
 104         char *string, *p;
 105
 106         clear = 0;
 107         if (setp)
 108                 *setp = 0;
 109         if (clrp)
 110                 *clrp = 0;
 111         string = *stringp;
 112         while ((p = strsep(&string, "\t ,")) != NULL) {
 113                 *stringp = p;
 114                 if (*p == '\0')
 115                         continue;
 116                 if (p[0] == 'n' && p[1] == 'o') {
 117                         clear = 1;
 118                         p += 2;
 119                 }
 120                 switch (p[0]) {
 121                 case 'a':
 122                         TEST(p, "arch", SF_ARCHIVED);
 123                         TEST(p, "archived", SF_ARCHIVED);
 124                         return (1);
 125                 case 'd':
 126                         clear = !clear;
 127                         TEST(p, "dump", UF_NODUMP);
 128                         return (1);
 129                 case 's':
 130                         TEST(p, "sappnd", SF_APPEND);
 131                         TEST(p, "sappend", SF_APPEND);
 132                         TEST(p, "schg", SF_IMMUTABLE);
 133                         TEST(p, "schange", SF_IMMUTABLE);
 134                         TEST(p, "simmutable", SF_IMMUTABLE);
 135                         return (1);
 136                 case 'u':
 137                         TEST(p, "uappnd", UF_APPEND);
 138                         TEST(p, "uappend", UF_APPEND);
 139                         TEST(p, "uchg", UF_IMMUTABLE);
 140                         TEST(p, "uchange", UF_IMMUTABLE);
 141                         TEST(p, "uimmutable", UF_IMMUTABLE);
 142                         /* FALLTHROUGH */
 143                 default:
 144                         return (1);
 145                 }
 146         }
 147         return (0);
 148 }