1 /* $NetBSD: mail_conf_long.c,v 1.1.1.2 2011/03/02 19:32:15 tron Exp $ */ 2 3 /*++ 4 /* NAME 5 /* mail_conf_long 3 6 /* SUMMARY 7 /* long integer-valued configuration parameter support 8 /* SYNOPSIS 9 /* #include <mail_conf.h> 10 /* 11 /* int get_mail_conf_long(name, defval, min, max); 12 /* const char *name; 13 /* long defval; 14 /* long min; 15 /* long max; 16 /* 17 /* int get_mail_conf_long_fn(name, defval, min, max); 18 /* const char *name; 19 /* long (*defval)(void); 20 /* long min; 21 /* long max; 22 /* 23 /* void set_mail_conf_long(name, value) 24 /* const char *name; 25 /* long value; 26 /* 27 /* void get_mail_conf_long_table(table) 28 /* const CONFIG_LONG_TABLE *table; 29 /* 30 /* void get_mail_conf_long_fn_table(table) 31 /* const CONFIG_LONG_TABLE *table; 32 /* AUXILIARY FUNCTIONS 33 /* int get_mail_conf_long2(name1, name2, defval, min, max); 34 /* const char *name1; 35 /* const char *name2; 36 /* long defval; 37 /* long min; 38 /* long max; 39 /* DESCRIPTION 40 /* This module implements configuration parameter support 41 /* for long integer values. 42 /* 43 /* get_mail_conf_long() looks up the named entry in the global 44 /* configuration dictionary. The default value is returned 45 /* when no value was found. 46 /* \fImin\fR is zero or specifies a lower limit on the long 47 /* integer value; \fImax\fR is zero or specifies an upper limit 48 /* on the long integer value. 49 /* 50 /* get_mail_conf_long_fn() is similar but specifies a function that 51 /* provides the default value. The function is called only 52 /* when the default value is needed. 53 /* 54 /* set_mail_conf_long() updates the named entry in the global 55 /* configuration dictionary. This has no effect on values that 56 /* have been looked up earlier via the get_mail_conf_XXX() routines. 57 /* 58 /* get_mail_conf_long_table() and get_mail_conf_long_fn_table() initialize 59 /* lists of variables, as directed by their table arguments. A table 60 /* must be terminated by a null entry. 61 /* 62 /* get_mail_conf_long2() concatenates the two names and is otherwise 63 /* identical to get_mail_conf_long(). 64 /* DIAGNOSTICS 65 /* Fatal errors: malformed numerical value. 66 /* SEE ALSO 67 /* config(3) general configuration 68 /* mail_conf_str(3) string-valued configuration parameters 69 /* LICENSE 70 /* .ad 71 /* .fi 72 /* The Secure Mailer license must be distributed with this software. 73 /* AUTHOR(S) 74 /* Wietse Venema 75 /* IBM T.J. Watson Research 76 /* P.O. Box 704 77 /* Yorktown Heights, NY 10598, USA 78 /*--*/ 79 80 /* System library. */ 81 82 #include <sys_defs.h> 83 #include <stdlib.h> 84 #include <stdio.h> /* BUFSIZ */ 85 #include <errno.h> 86 87 /* Utility library. */ 88 89 #include <msg.h> 90 #include <mymalloc.h> 91 #include <dict.h> 92 #include <stringops.h> 93 94 /* Global library. */ 95 96 #include "mail_conf.h" 97 98 /* convert_mail_conf_long - look up and convert integer parameter value */ 99 100 static int convert_mail_conf_long(const char *name, long *longval) 101 { 102 const char *strval; 103 char *end; 104 105 if ((strval = mail_conf_lookup_eval(name)) != 0) { 106 errno = 0; 107 *longval = strtol(strval, &end, 10); 108 if (*strval == 0 || *end != 0 || errno == ERANGE) 109 msg_fatal("bad numerical configuration: %s = %s", name, strval); 110 return (1); 111 } 112 return (0); 113 } 114 115 /* check_mail_conf_long - validate integer value */ 116 117 static void check_mail_conf_long(const char *name, long longval, long min, long max) 118 { 119 if (min && longval < min) 120 msg_fatal("invalid %s parameter value %ld < %ld", name, longval, min); 121 if (max && longval > max) 122 msg_fatal("invalid %s parameter value %ld > %ld", name, longval, max); 123 } 124 125 /* get_mail_conf_long - evaluate integer-valued configuration variable */ 126 127 long get_mail_conf_long(const char *name, long defval, long min, long max) 128 { 129 long longval; 130 131 if (convert_mail_conf_long(name, &longval) == 0) 132 set_mail_conf_long(name, longval = defval); 133 check_mail_conf_long(name, longval, min, max); 134 return (longval); 135 } 136 137 /* get_mail_conf_long2 - evaluate integer-valued configuration variable */ 138 139 long get_mail_conf_long2(const char *name1, const char *name2, long defval, 140 long min, long max) 141 { 142 long longval; 143 char *name; 144 145 name = concatenate(name1, name2, (char *) 0); 146 if (convert_mail_conf_long(name, &longval) == 0) 147 set_mail_conf_long(name, longval = defval); 148 check_mail_conf_long(name, longval, min, max); 149 myfree(name); 150 return (longval); 151 } 152 153 /* get_mail_conf_long_fn - evaluate integer-valued configuration variable */ 154 155 typedef long (*stupid_indent_long) (void); 156 157 long get_mail_conf_long_fn(const char *name, stupid_indent_long defval, 158 long min, long max) 159 { 160 long longval; 161 162 if (convert_mail_conf_long(name, &longval) == 0) 163 set_mail_conf_long(name, longval = defval()); 164 check_mail_conf_long(name, longval, min, max); 165 return (longval); 166 } 167 168 /* set_mail_conf_long - update integer-valued configuration dictionary entry */ 169 170 void set_mail_conf_long(const char *name, long value) 171 { 172 char buf[BUFSIZ]; /* yeah! crappy code! */ 173 174 sprintf(buf, "%ld", value); /* yeah! more crappy code! */ 175 mail_conf_update(name, buf); 176 } 177 178 /* get_mail_conf_long_table - look up table of integers */ 179 180 void get_mail_conf_long_table(const CONFIG_LONG_TABLE *table) 181 { 182 while (table->name) { 183 table->target[0] = get_mail_conf_long(table->name, table->defval, 184 table->min, table->max); 185 table++; 186 } 187 } 188 189 /* get_mail_conf_long_fn_table - look up integers, defaults are functions */ 190 191 void get_mail_conf_long_fn_table(const CONFIG_LONG_FN_TABLE *table) 192 { 193 while (table->name) { 194 table->target[0] = get_mail_conf_long_fn(table->name, table->defval, 195 table->min, table->max); 196 table++; 197 } 198 } 199