1 /* $NetBSD: mail_conf_int.c,v 1.2 2017/02/14 01:16:45 christos Exp $ */ 2 3 /*++ 4 /* NAME 5 /* mail_conf_int 3 6 /* SUMMARY 7 /* integer-valued configuration parameter support 8 /* SYNOPSIS 9 /* #include <mail_conf.h> 10 /* 11 /* int get_mail_conf_int(name, defval, min, max); 12 /* const char *name; 13 /* int defval; 14 /* int min; 15 /* int max; 16 /* 17 /* int get_mail_conf_int_fn(name, defval, min, max); 18 /* const char *name; 19 /* int (*defval)(); 20 /* int min; 21 /* int max; 22 /* 23 /* void set_mail_conf_int(name, value) 24 /* const char *name; 25 /* int value; 26 /* 27 /* void get_mail_conf_int_table(table) 28 /* const CONFIG_INT_TABLE *table; 29 /* 30 /* void get_mail_conf_int_fn_table(table) 31 /* const CONFIG_INT_TABLE *table; 32 /* AUXILIARY FUNCTIONS 33 /* int get_mail_conf_int2(name1, name2, defval, min, max); 34 /* const char *name1; 35 /* const char *name2; 36 /* int defval; 37 /* int min; 38 /* int max; 39 /* 40 /* void check_mail_conf_int(name, intval, min, max) 41 /* const char *name; 42 /* int intval; 43 /* int min; 44 /* int max; 45 /* DESCRIPTION 46 /* This module implements configuration parameter support 47 /* for integer values. 48 /* 49 /* get_mail_conf_int() looks up the named entry in the global 50 /* configuration dictionary. The default value is returned 51 /* when no value was found. 52 /* \fImin\fR is zero or specifies a lower limit on the integer 53 /* value or string length; \fImax\fR is zero or specifies an 54 /* upper limit on the integer value or string length. 55 /* 56 /* get_mail_conf_int_fn() is similar but specifies a function that 57 /* provides the default value. The function is called only 58 /* when the default value is needed. 59 /* 60 /* set_mail_conf_int() updates the named entry in the global 61 /* configuration dictionary. This has no effect on values that 62 /* have been looked up earlier via the get_mail_conf_XXX() routines. 63 /* 64 /* get_mail_conf_int_table() and get_mail_conf_int_fn_table() initialize 65 /* lists of variables, as directed by their table arguments. A table 66 /* must be terminated by a null entry. 67 /* 68 /* get_mail_conf_int2() concatenates the two names and is otherwise 69 /* identical to get_mail_conf_int(). 70 /* 71 /* check_mail_conf_int() exits with a fatal run-time error 72 /* when the integer value does not meet its requirements. 73 /* DIAGNOSTICS 74 /* Fatal errors: malformed numerical value. 75 /* SEE ALSO 76 /* config(3) general configuration 77 /* mail_conf_str(3) string-valued configuration parameters 78 /* LICENSE 79 /* .ad 80 /* .fi 81 /* The Secure Mailer license must be distributed with this software. 82 /* AUTHOR(S) 83 /* Wietse Venema 84 /* IBM T.J. Watson Research 85 /* P.O. Box 704 86 /* Yorktown Heights, NY 10598, USA 87 /*--*/ 88 89 /* System library. */ 90 91 #include <sys_defs.h> 92 #include <stdlib.h> 93 #include <stdio.h> /* BUFSIZ */ 94 #include <errno.h> 95 96 /* Utility library. */ 97 98 #include <msg.h> 99 #include <mymalloc.h> 100 #include <dict.h> 101 #include <stringops.h> 102 103 /* Global library. */ 104 105 #include "mail_conf.h" 106 107 /* convert_mail_conf_int - look up and convert integer parameter value */ 108 109 static int convert_mail_conf_int(const char *name, int *intval) 110 { 111 const char *strval; 112 char *end; 113 long longval; 114 115 if ((strval = mail_conf_lookup_eval(name)) != 0) { 116 errno = 0; 117 *intval = longval = strtol(strval, &end, 10); 118 if (*strval == 0 || *end != 0 || errno == ERANGE || longval != *intval) 119 msg_fatal("bad numerical configuration: %s = %s", name, strval); 120 return (1); 121 } 122 return (0); 123 } 124 125 /* check_mail_conf_int - validate integer value */ 126 127 void check_mail_conf_int(const char *name, int intval, int min, int max) 128 { 129 if (min && intval < min) 130 msg_fatal("invalid %s parameter value %d < %d", name, intval, min); 131 if (max && intval > max) 132 msg_fatal("invalid %s parameter value %d > %d", name, intval, max); 133 } 134 135 /* get_mail_conf_int - evaluate integer-valued configuration variable */ 136 137 int get_mail_conf_int(const char *name, int defval, int min, int max) 138 { 139 int intval; 140 141 if (convert_mail_conf_int(name, &intval) == 0) 142 set_mail_conf_int(name, intval = defval); 143 check_mail_conf_int(name, intval, min, max); 144 return (intval); 145 } 146 147 /* get_mail_conf_int2 - evaluate integer-valued configuration variable */ 148 149 int get_mail_conf_int2(const char *name1, const char *name2, int defval, 150 int min, int max) 151 { 152 int intval; 153 char *name; 154 155 name = concatenate(name1, name2, (char *) 0); 156 if (convert_mail_conf_int(name, &intval) == 0) 157 set_mail_conf_int(name, intval = defval); 158 check_mail_conf_int(name, intval, min, max); 159 myfree(name); 160 return (intval); 161 } 162 163 /* get_mail_conf_int_fn - evaluate integer-valued configuration variable */ 164 165 typedef int (*stupid_indent_int) (void); 166 167 int get_mail_conf_int_fn(const char *name, stupid_indent_int defval, 168 int min, int max) 169 { 170 int intval; 171 172 if (convert_mail_conf_int(name, &intval) == 0) 173 set_mail_conf_int(name, intval = defval()); 174 check_mail_conf_int(name, intval, min, max); 175 return (intval); 176 } 177 178 /* set_mail_conf_int - update integer-valued configuration dictionary entry */ 179 180 void set_mail_conf_int(const char *name, int value) 181 { 182 char buf[BUFSIZ]; /* yeah! crappy code! */ 183 184 sprintf(buf, "%d", value); /* yeah! more crappy code! */ 185 mail_conf_update(name, buf); 186 } 187 188 /* get_mail_conf_int_table - look up table of integers */ 189 190 void get_mail_conf_int_table(const CONFIG_INT_TABLE *table) 191 { 192 while (table->name) { 193 table->target[0] = get_mail_conf_int(table->name, table->defval, 194 table->min, table->max); 195 table++; 196 } 197 } 198 199 /* get_mail_conf_int_fn_table - look up integers, defaults are functions */ 200 201 void get_mail_conf_int_fn_table(const CONFIG_INT_FN_TABLE *table) 202 { 203 while (table->name) { 204 table->target[0] = get_mail_conf_int_fn(table->name, table->defval, 205 table->min, table->max); 206 table++; 207 } 208 } 209