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