1 /* $NetBSD: mail_conf_int.c,v 1.3 2020/03/18 19:05:16 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 /* Wietse Venema 89 /* Google, Inc. 90 /* 111 8th Avenue 91 /* New York, NY 10011, USA 92 /*--*/ 93 94 /* System library. */ 95 96 #include <sys_defs.h> 97 #include <stdlib.h> 98 #include <stdio.h> /* BUFSIZ */ 99 #include <errno.h> 100 101 /* Utility library. */ 102 103 #include <msg.h> 104 #include <mymalloc.h> 105 #include <dict.h> 106 #include <stringops.h> 107 108 /* Global library. */ 109 110 #include "mail_conf.h" 111 112 /* convert_mail_conf_int - look up and convert integer parameter value */ 113 114 static int convert_mail_conf_int(const char *name, int *intval) 115 { 116 const char *strval; 117 char *end; 118 long longval; 119 120 if ((strval = mail_conf_lookup_eval(name)) != 0) { 121 errno = 0; 122 *intval = longval = strtol(strval, &end, 10); 123 if (*strval == 0 || *end != 0 || errno == ERANGE || longval != *intval) 124 msg_fatal("bad numerical configuration: %s = %s", name, strval); 125 return (1); 126 } 127 return (0); 128 } 129 130 /* check_mail_conf_int - validate integer value */ 131 132 void check_mail_conf_int(const char *name, int intval, int min, int max) 133 { 134 if (min && intval < min) 135 msg_fatal("invalid %s parameter value %d < %d", name, intval, min); 136 if (max && intval > max) 137 msg_fatal("invalid %s parameter value %d > %d", name, intval, max); 138 } 139 140 /* get_mail_conf_int - evaluate integer-valued configuration variable */ 141 142 int get_mail_conf_int(const char *name, int defval, int min, int max) 143 { 144 int intval; 145 146 if (convert_mail_conf_int(name, &intval) == 0) 147 set_mail_conf_int(name, intval = defval); 148 check_mail_conf_int(name, intval, min, max); 149 return (intval); 150 } 151 152 /* get_mail_conf_int2 - evaluate integer-valued configuration variable */ 153 154 int get_mail_conf_int2(const char *name1, const char *name2, int defval, 155 int min, int max) 156 { 157 int intval; 158 char *name; 159 160 name = concatenate(name1, name2, (char *) 0); 161 if (convert_mail_conf_int(name, &intval) == 0) 162 set_mail_conf_int(name, intval = defval); 163 check_mail_conf_int(name, intval, min, max); 164 myfree(name); 165 return (intval); 166 } 167 168 /* get_mail_conf_int_fn - evaluate integer-valued configuration variable */ 169 170 typedef int (*stupid_indent_int) (void); 171 172 int get_mail_conf_int_fn(const char *name, stupid_indent_int defval, 173 int min, int max) 174 { 175 int intval; 176 177 if (convert_mail_conf_int(name, &intval) == 0) 178 set_mail_conf_int(name, intval = defval()); 179 check_mail_conf_int(name, intval, min, max); 180 return (intval); 181 } 182 183 /* set_mail_conf_int - update integer-valued configuration dictionary entry */ 184 185 void set_mail_conf_int(const char *name, int value) 186 { 187 const char myname[] = "set_mail_conf_int"; 188 char buf[BUFSIZ]; /* yeah! crappy code! */ 189 190 #ifndef NO_SNPRINTF 191 ssize_t ret; 192 193 ret = snprintf(buf, sizeof(buf), "%d", value); 194 if (ret < 0) 195 msg_panic("%s: output error for %%d", myname); 196 if (ret >= sizeof(buf)) 197 msg_panic("%s: output for %%d exceeds space %ld", 198 myname, (long) sizeof(buf)); 199 #else 200 sprintf(buf, "%d", value); /* yeah! more crappy code! */ 201 #endif 202 mail_conf_update(name, buf); 203 } 204 205 /* get_mail_conf_int_table - look up table of integers */ 206 207 void get_mail_conf_int_table(const CONFIG_INT_TABLE *table) 208 { 209 while (table->name) { 210 table->target[0] = get_mail_conf_int(table->name, table->defval, 211 table->min, table->max); 212 table++; 213 } 214 } 215 216 /* get_mail_conf_int_fn_table - look up integers, defaults are functions */ 217 218 void get_mail_conf_int_fn_table(const CONFIG_INT_FN_TABLE *table) 219 { 220 while (table->name) { 221 table->target[0] = get_mail_conf_int_fn(table->name, table->defval, 222 table->min, table->max); 223 table++; 224 } 225 } 226
Indexes created Thu Jun 11 00:25:07 UTC 2026