1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*++
/* NAME
/* attr_override 3
/* SUMMARY
/* apply name=value settings from string
/* SYNOPSIS
/* #include <attr_override.h>
/*
/* void attr_override(bp, delimiters, parens, ... CA_ATTR_OVER_END);
/* char *bp;
/* const char *delimiters;
/* const char *parens;
/* DESCRIPTION
/* This routine updates the values of known in-memory variables
/* based on the name=value specifications from an input string.
/* The input format supports parentheses around name=value to
/* allow whitespace around "=" and within values.
/*
/* This may be used, for example, with client endpoint
/* specifications or with policy tables to allow selective
/* overrides of global main.cf parameter settings (timeouts,
/* fall-back policies, etc.).
/*
/* Arguments:
/* .IP bp
/* Pointer to input string. The input is modified.
/* .IP "delimiters, parens"
/* See mystrtok(3) for description. Typical values are
/* CHARS_COMMA_SP and CHARS_BRACE, respectively.
/* .PP
/* The parens argument is followed by a list of macros
/* with arguments. Each macro may appear only once. The list
/* must be terminated with CA_ATTR_OVER_END which has no argument.
/* The following describes the expected values.
/* .IP "CA_ATTR_OVER_STR_TABLE(const ATTR_OVER_STR *)"
/* The macro argument specifies a null-terminated table with
/* attribute names, assignment targets, and range limits which
/* should be the same as for the corresponding main.cf parameters.
/* .IP "CA_ATTR_OVER_TIME_TABLE(const ATTR_OVER_TIME *)"
/* The macro argument specifies a null-terminated table with
/* attribute names, their default time units (leading digits
/* are skipped), assignment targets, and range limits which
/* should be the same as for the corresponding main.cf parameters.
/* .IP "CA_ATTR_OVER_INT_TABLE(const ATTR_OVER_INT *)"
/* The macro argument specifies a null-terminated table with
/* attribute names, assignment targets, and range limits which
/* should be the same as for the corresponding main.cf parameters.
/* SEE ALSO
/* mystrtok(3), safe tokenizer
/* extpar(3), extract text from parentheses
/* split_nameval(3), name-value splitter
/* DIAGNOSTICS
/* Panic: interface violations.
/*
/* Fatal errors: memory allocation problem, syntax error,
/* out-of-range error.
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*--*/
/*
* System library.
*/
#include <sys_defs.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h> /* strtol() */
/*
* Utility library.
*/
#include <msg.h>
#include <stringops.h>
/*
* Global library.
*/
#include <mail_conf.h>
#include <conv_time.h>
#include <attr_override.h>
/* attr_override - apply settings from list of attribute=value pairs */
void attr_override(char *cp, const char *sep, const char *parens,...)
{
static const char myname[] = "attr_override";
va_list ap;
int idx;
char *nameval;
const ATTR_OVER_INT *int_table = 0;
const ATTR_OVER_STR *str_table = 0;
const ATTR_OVER_TIME *time_table = 0;
/*
* Get the lookup tables and assignment targets.
*/
va_start(ap, parens);
while ((idx = va_arg(ap, int)) != ATTR_OVER_END) {
switch (idx) {
case ATTR_OVER_INT_TABLE:
if (int_table)
msg_panic("%s: multiple ATTR_OVER_INT_TABLE", myname);
int_table = va_arg(ap, const ATTR_OVER_INT *);
break;
case ATTR_OVER_STR_TABLE:
if (str_table)
msg_panic("%s: multiple ATTR_OVER_STR_TABLE", myname);
str_table = va_arg(ap, const ATTR_OVER_STR *);
break;
case ATTR_OVER_TIME_TABLE:
if (time_table)
msg_panic("%s: multiple ATTR_OVER_TIME_TABLE", myname);
time_table = va_arg(ap, const ATTR_OVER_TIME *);
break;
default:
msg_panic("%s: unknown argument type: %d", myname, idx);
}
}
va_end(ap);
/*
* Process each attribute=value override in the input string.
*/
while ((nameval = mystrtokq(&cp, sep, parens)) != 0) {
int found = 0;
char *key;
char *value;
const char *err;
const ATTR_OVER_INT *ip;
const ATTR_OVER_STR *sp;
const ATTR_OVER_TIME *tp;
int int_val;
int def_unit;
char *end;
long longval;
/*
* Split into name and value.
*/
/* { name = value } */
if (*nameval == parens[0]
&& (err = extpar(&nameval, parens, EXTPAR_FLAG_NONE)) != 0)
msg_fatal("%s in \"%s\"", err, nameval);
if ((err = split_nameval(nameval, &key, &value)) != 0)
msg_fatal("malformed option: %s: \"...%s...\"", err, nameval);
/*
* Look up the name and apply the value.
*/
for (sp = str_table; sp != 0 && found == 0 && sp->name != 0; sp++) {
if (strcmp(sp->name, key) != 0)
continue;
check_mail_conf_str(sp->name, value, sp->min, sp->max);
sp->target[0] = value;
found = 1;
}
for (ip = int_table; ip != 0 && found == 0 && ip->name != 0; ip++) {
if (strcmp(ip->name, key) != 0)
continue;
/* XXX Duplicated from mail_conf_int(3). */
errno = 0;
int_val = longval = strtol(value, &end, 10);
if (*value == 0 || *end != 0 || errno == ERANGE
|| longval != int_val)
msg_fatal("bad numerical configuration: %s = %s", key, value);
check_mail_conf_int(key, int_val, ip->min, ip->max);
ip->target[0] = int_val;
found = 1;
}
for (tp = time_table; tp != 0 && found == 0 && tp->name != 0; tp++) {
if (strcmp(tp->name, key) != 0)
continue;
def_unit = tp->defval[strspn(tp->defval, "0123456789")];
if (conv_time(value, &int_val, def_unit) == 0)
msg_fatal("%s: bad time value or unit: %s", key, value);
check_mail_conf_time(key, int_val, tp->min, tp->max);
tp->target[0] = int_val;
found = 1;
}
if (found == 0)
msg_fatal("unknown option: \"%s = %s\"", key, value);
}
}
|
