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      1 /*	$NetBSD: mail_conf_bool.c,v 1.1.1.1 2009/06/23 10:08:46 tron Exp $	*/
      2 
      3 /*++
      4 /* NAME
      5 /*	mail_conf_bool 3
      6 /* SUMMARY
      7 /*	boolean-valued configuration parameter support
      8 /* SYNOPSIS
      9 /*	#include <mail_conf.h>
     10 /*
     11 /*	int	get_mail_conf_bool(name, defval)
     12 /*	const char *name;
     13 /*	int	defval;
     14 /*
     15 /*	int	get_mail_conf_bool_fn(name, defval)
     16 /*	const char *name;
     17 /*	int	(*defval)();
     18 /*
     19 /*	void	set_mail_conf_bool(name, value)
     20 /*	const char *name;
     21 /*	int	value;
     22 /*
     23 /*	void	get_mail_conf_bool_table(table)
     24 /*	const CONFIG_BOOL_TABLE *table;
     25 /*
     26 /*	void	get_mail_conf_bool_fn_table(table)
     27 /*	const CONFIG_BOOL_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.
     34 /*
     35 /*	get_mail_conf_bool() looks up the named entry in the global
     36 /*	configuration dictionary. The specified default value is
     37 /*	returned when no value was found.
     38 /*
     39 /*	get_mail_conf_bool_fn() is similar but specifies a function that
     40 /*	provides the default value. The function is called only
     41 /*	when the default value is needed.
     42 /*
     43 /*	set_mail_conf_bool() updates the named entry in the global
     44 /*	configuration dictionary. This has no effect on values that
     45 /*	have been looked up earlier via the get_mail_conf_XXX() routines.
     46 /*
     47 /*	get_mail_conf_bool_table() and get_mail_conf_int_fn_table() initialize
     48 /*	lists of variables, as directed by their table arguments. A table
     49 /*	must be terminated by a null entry.
     50 /* DIAGNOSTICS
     51 /*	Fatal errors: malformed boolean value.
     52 /* SEE ALSO
     53 /*	config(3) general configuration
     54 /*	mail_conf_str(3) string-valued configuration parameters
     55 /*	mail_conf_int(3) integer-valued configuration parameters
     56 /* LICENSE
     57 /* .ad
     58 /* .fi
     59 /*	The Secure Mailer license must be distributed with this software.
     60 /* AUTHOR(S)
     61 /*	Wietse Venema
     62 /*	IBM T.J. Watson Research
     63 /*	P.O. Box 704
     64 /*	Yorktown Heights, NY 10598, USA
     65 /*--*/
     66 
     67 /* System library. */
     68 
     69 #include <sys_defs.h>
     70 #include <stdlib.h>
     71 #include <string.h>
     72 
     73 #ifdef STRCASECMP_IN_STRINGS_H
     74 #include <strings.h>
     75 #endif
     76 
     77 /* Utility library. */
     78 
     79 #include <msg.h>
     80 #include <dict.h>
     81 
     82 /* Global library. */
     83 
     84 #include "mail_conf.h"
     85 
     86 /* convert_mail_conf_bool - look up and convert boolean parameter value */
     87 
     88 static int convert_mail_conf_bool(const char *name, int *intval)
     89 {
     90     const char *strval;
     91 
     92     if ((strval = mail_conf_lookup_eval(name)) == 0) {
     93 	return (0);
     94     } else {
     95 	if (strcasecmp(strval, CONFIG_BOOL_YES) == 0) {
     96 	    *intval = 1;
     97 	} else if (strcasecmp(strval, CONFIG_BOOL_NO) == 0) {
     98 	    *intval = 0;
     99 	} else {
    100 	    msg_fatal("bad boolean configuration: %s = %s", name, strval);
    101 	}
    102 	return (1);
    103     }
    104 }
    105 
    106 /* get_mail_conf_bool - evaluate boolean-valued configuration variable */
    107 
    108 int     get_mail_conf_bool(const char *name, int defval)
    109 {
    110     int     intval;
    111 
    112     if (convert_mail_conf_bool(name, &intval) == 0)
    113 	set_mail_conf_bool(name, intval = defval);
    114     return (intval);
    115 }
    116 
    117 /* get_mail_conf_bool_fn - evaluate boolean-valued configuration variable */
    118 
    119 typedef int (*stupid_indent_int) (void);
    120 
    121 int     get_mail_conf_bool_fn(const char *name, stupid_indent_int defval)
    122 {
    123     int     intval;
    124 
    125     if (convert_mail_conf_bool(name, &intval) == 0)
    126 	set_mail_conf_bool(name, intval = defval());
    127     return (intval);
    128 }
    129 
    130 /* set_mail_conf_bool - update boolean-valued configuration dictionary entry */
    131 
    132 void    set_mail_conf_bool(const char *name, int value)
    133 {
    134     mail_conf_update(name, value ? CONFIG_BOOL_YES : CONFIG_BOOL_NO);
    135 }
    136 
    137 /* get_mail_conf_bool_table - look up table of booleans */
    138 
    139 void    get_mail_conf_bool_table(const CONFIG_BOOL_TABLE *table)
    140 {
    141     while (table->name) {
    142 	table->target[0] = get_mail_conf_bool(table->name, table->defval);
    143 	table++;
    144     }
    145 }
    146 
    147 /* get_mail_conf_bool_fn_table - look up booleans, defaults are functions */
    148 
    149 void    get_mail_conf_bool_fn_table(const CONFIG_BOOL_FN_TABLE *table)
    150 {
    151     while (table->name) {
    152 	table->target[0] = get_mail_conf_bool_fn(table->name, table->defval);
    153 	table++;
    154     }
    155 }
    156