1 /* $NetBSD: mail_conf_nbool.c,v 1.1.1.1 2011/03/02 19:32:15 tron Exp $ */
2
3 /*++
4 /* NAME
5 /* mail_conf_nbool 3
6 /* SUMMARY
7 /* boolean-valued configuration parameter support
8 /* SYNOPSIS
9 /* #include <mail_conf.h>
10 /*
11 /* int get_mail_conf_nbool(name, defval)
12 /* const char *name;
13 /* const char *defval;
14 /*
15 /* int get_mail_conf_nbool_fn(name, defval)
16 /* const char *name;
17 /* const char *(*defval)();
18 /*
19 /* void set_mail_conf_nbool(name, value)
20 /* const char *name;
21 /* const char *value;
22 /*
23 /* void get_mail_conf_nbool_table(table)
24 /* const CONFIG_NBOOL_TABLE *table;
25 /*
26 /* void get_mail_conf_nbool_fn_table(table)
27 /* const CONFIG_NBOOL_TABLE *table;
28 /* DESCRIPTION
29 /* This module implements configuration parameter support for
30 /* boolean values. The internal representation is zero (false)
31 /* and non-zero (true). The external representation is "no"
32 /* (false) and "yes" (true). The conversion from external
33 /* representation is case insensitive. Unlike mail_conf_bool(3)
34 /* the default is a string value which is subject to macro expansion.
35 /*
36 /* get_mail_conf_nbool() looks up the named entry in the global
37 /* configuration dictionary. The specified default value is
38 /* returned when no value was found.
39 /*
40 /* get_mail_conf_nbool_fn() is similar but specifies a function that
41 /* provides the default value. The function is called only
42 /* when the default value is needed.
43 /*
44 /* set_mail_conf_nbool() updates the named entry in the global
45 /* configuration dictionary. This has no effect on values that
46 /* have been looked up earlier via the get_mail_conf_XXX() routines.
47 /*
48 /* get_mail_conf_nbool_table() and get_mail_conf_int_fn_table() initialize
49 /* lists of variables, as directed by their table arguments. A table
50 /* must be terminated by a null entry.
51 /* DIAGNOSTICS
52 /* Fatal errors: malformed boolean value.
53 /* SEE ALSO
54 /* config(3) general configuration
55 /* mail_conf_str(3) string-valued configuration parameters
56 /* mail_conf_int(3) integer-valued configuration parameters
57 /* LICENSE
58 /* .ad
59 /* .fi
60 /* The Secure Mailer license must be distributed with this software.
61 /* AUTHOR(S)
62 /* Wietse Venema
63 /* IBM T.J. Watson Research
64 /* P.O. Box 704
65 /* Yorktown Heights, NY 10598, USA
66 /*--*/
67
68 /* System library. */
69
70 #include <sys_defs.h>
71 #include <stdlib.h>
72 #include <string.h>
73
74 #ifdef STRCASECMP_IN_STRINGS_H
75 #include <strings.h>
76 #endif
77
78 /* Utility library. */
79
80 #include <msg.h>
81 #include <dict.h>
82
83 /* Global library. */
84
85 #include "mail_conf.h"
86
87 /* convert_mail_conf_nbool - look up and convert boolean parameter value */
88
convert_mail_conf_nbool(const char * name,int * intval)89 static int convert_mail_conf_nbool(const char *name, int *intval)
90 {
91 const char *strval;
92
93 if ((strval = mail_conf_lookup_eval(name)) == 0) {
94 return (0);
95 } else {
96 if (strcasecmp(strval, CONFIG_BOOL_YES) == 0) {
97 *intval = 1;
98 } else if (strcasecmp(strval, CONFIG_BOOL_NO) == 0) {
99 *intval = 0;
100 } else {
101 msg_fatal("bad boolean configuration: %s = %s", name, strval);
102 }
103 return (1);
104 }
105 }
106
107 /* get_mail_conf_nbool - evaluate boolean-valued configuration variable */
108
get_mail_conf_nbool(const char * name,const char * defval)109 int get_mail_conf_nbool(const char *name, const char *defval)
110 {
111 int intval;
112
113 if (convert_mail_conf_nbool(name, &intval) == 0)
114 set_mail_conf_nbool(name, defval);
115 if (convert_mail_conf_nbool(name, &intval) == 0)
116 msg_panic("get_mail_conf_nbool: parameter not found: %s", name);
117 return (intval);
118 }
119
120 /* get_mail_conf_nbool_fn - evaluate boolean-valued configuration variable */
121
122 typedef const char *(*stupid_indent_int) (void);
123
get_mail_conf_nbool_fn(const char * name,stupid_indent_int defval)124 int get_mail_conf_nbool_fn(const char *name, stupid_indent_int defval)
125 {
126 int intval;
127
128 if (convert_mail_conf_nbool(name, &intval) == 0)
129 set_mail_conf_nbool(name, defval());
130 if (convert_mail_conf_nbool(name, &intval) == 0)
131 msg_panic("get_mail_conf_nbool_fn: parameter not found: %s", name);
132 return (intval);
133 }
134
135 /* set_mail_conf_nbool - update boolean-valued configuration dictionary entry */
136
set_mail_conf_nbool(const char * name,const char * value)137 void set_mail_conf_nbool(const char *name, const char *value)
138 {
139 mail_conf_update(name, value);
140 }
141
142 /* get_mail_conf_nbool_table - look up table of booleans */
143
get_mail_conf_nbool_table(const CONFIG_NBOOL_TABLE * table)144 void get_mail_conf_nbool_table(const CONFIG_NBOOL_TABLE *table)
145 {
146 while (table->name) {
147 table->target[0] = get_mail_conf_nbool(table->name, table->defval);
148 table++;
149 }
150 }
151
152 /* get_mail_conf_nbool_fn_table - look up booleans, defaults are functions */
153
get_mail_conf_nbool_fn_table(const CONFIG_NBOOL_FN_TABLE * table)154 void get_mail_conf_nbool_fn_table(const CONFIG_NBOOL_FN_TABLE *table)
155 {
156 while (table->name) {
157 table->target[0] = get_mail_conf_nbool_fn(table->name, table->defval);
158 table++;
159 }
160 }
161