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/*++
/* NAME
/* mail_conf_time 3
/* SUMMARY
/* time interval configuration parameter support
/* SYNOPSIS
/* #include <mail_conf.h>
/*
/* int get_mail_conf_time(name, defval, min, max);
/* const char *name;
/* const char *defval;
/* int min;
/* int max;
/*
/* void set_mail_conf_time(name, value)
/* const char *name;
/* const char *value;
/*
/* void set_mail_conf_time_int(name, value)
/* const char *name;
/* int value;
/*
/* void get_mail_conf_time_table(table)
/* const CONFIG_TIME_TABLE *table;
/* AUXILIARY FUNCTIONS
/* int get_mail_conf_time2(name1, name2, defval, def_unit, min, max);
/* const char *name1;
/* const char *name2;
/* int defval;
/* int def_unit;
/* int min;
/* int max;
/*
/* void check_mail_conf_time(name, intval, min, max)
/* const char *name;
/* int intval;
/* int min;
/* int max;
/* DESCRIPTION
/* This module implements configuration parameter support
/* for time interval values. The conversion routines understand
/* one-letter suffixes to specify an explicit time unit: s
/* (seconds), m (minutes), h (hours), d (days) or w (weeks).
/* Internally, time is represented in seconds.
/*
/* get_mail_conf_time() looks up the named entry in the global
/* configuration dictionary. The default value is returned
/* when no value was found. \fIdef_unit\fR supplies the default
/* time unit for numbers specified without explicit unit.
/* \fImin\fR is zero or specifies a lower limit on the integer
/* value or string length; \fImax\fR is zero or specifies an
/* upper limit on the integer value or string length.
/*
/* set_mail_conf_time() updates the named entry in the global
/* configuration dictionary. This has no effect on values that
/* have been looked up earlier via the get_mail_conf_XXX() routines.
/*
/* get_mail_conf_time_table() and get_mail_conf_time_fn_table() initialize
/* lists of variables, as directed by their table arguments. A table
/* must be terminated by a null entry.
/*
/* check_mail_conf_time() terminates the program with a fatal
/* runtime error when the time does not meet its requirements.
/* DIAGNOSTICS
/* Fatal errors: malformed numerical value, unknown time unit.
/* BUGS
/* Values and defaults are given in any unit; upper and lower
/* bounds are given in seconds.
/* SEE ALSO
/* config(3) general configuration
/* mail_conf_str(3) string-valued configuration parameters
/* 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
/*
/* Wietse Venema
/* Google, Inc.
/* 111 8th Avenue
/* New York, NY 10011, USA
/*--*/
/* System library. */
#include <sys_defs.h>
#include <stdlib.h>
#include <stdio.h> /* BUFSIZ */
#include <ctype.h>
/* Utility library. */
#include <msg.h>
#include <mymalloc.h>
#include <dict.h>
#include <stringops.h>
/* Global library. */
#include "conv_time.h"
#include "mail_conf.h"
/* convert_mail_conf_time - look up and convert integer parameter value */
static int convert_mail_conf_time(const char *name, int *intval, int def_unit)
{
const char *strval;
if ((strval = mail_conf_lookup_eval(name)) == 0)
return (0);
if (conv_time(strval, intval, def_unit) == 0)
msg_fatal("parameter %s: bad time value or unit: %s", name, strval);
return (1);
}
/* check_mail_conf_time - validate integer value */
void check_mail_conf_time(const char *name, int intval, int min, int max)
{
if (min && intval < min)
msg_fatal("invalid %s: %d (min %d)", name, intval, min);
if (max && intval > max)
msg_fatal("invalid %s: %d (max %d)", name, intval, max);
}
/* get_def_time_unit - extract time unit from default value */
static int get_def_time_unit(const char *name, const char *defval)
{
const char *cp;
for (cp = mail_conf_eval(defval); /* void */ ; cp++) {
if (*cp == 0)
msg_panic("parameter %s: missing time unit in default value: %s",
name, defval);
if (ISALPHA(*cp)) {
#if 0
if (cp[1] != 0)
msg_panic("parameter %s: bad time unit in default value: %s",
name, defval);
#endif
return (*cp);
}
}
}
/* get_mail_conf_time - evaluate integer-valued configuration variable */
int get_mail_conf_time(const char *name, const char *defval, int min, int max)
{
int intval;
int def_unit;
def_unit = get_def_time_unit(name, defval);
if (convert_mail_conf_time(name, &intval, def_unit) == 0)
set_mail_conf_time(name, defval);
if (convert_mail_conf_time(name, &intval, def_unit) == 0)
msg_panic("get_mail_conf_time: parameter not found: %s", name);
check_mail_conf_time(name, intval, min, max);
return (intval);
}
/* get_mail_conf_time2 - evaluate integer-valued configuration variable */
int get_mail_conf_time2(const char *name1, const char *name2,
int defval, int def_unit, int min, int max)
{
int intval;
char *name;
name = concatenate(name1, name2, (char *) 0);
if (convert_mail_conf_time(name, &intval, def_unit) == 0)
set_mail_conf_time_int(name, defval);
if (convert_mail_conf_time(name, &intval, def_unit) == 0)
msg_panic("get_mail_conf_time2: parameter not found: %s", name);
check_mail_conf_time(name, intval, min, max);
myfree(name);
return (intval);
}
/* set_mail_conf_time - update integer-valued configuration dictionary entry */
void set_mail_conf_time(const char *name, const char *value)
{
mail_conf_update(name, value);
}
/* set_mail_conf_time_int - update integer-valued configuration dictionary entry */
void set_mail_conf_time_int(const char *name, int value)
{
const char myname[] = "set_mail_conf_time_int";
char buf[BUFSIZ]; /* yeah! crappy code! */
#ifndef NO_SNPRINTF
ssize_t ret;
ret = snprintf(buf, sizeof(buf), "%ds", value);
if (ret < 0)
msg_panic("%s: output error for %%ds", myname);
if (ret >= sizeof(buf))
msg_panic("%s: output for %%ds exceeds space %ld",
myname, (long) sizeof(buf));
#else
sprintf(buf, "%ds", value); /* yeah! more crappy code! */
#endif
mail_conf_update(name, buf);
}
/* get_mail_conf_time_table - look up table of integers */
void get_mail_conf_time_table(const CONFIG_TIME_TABLE *table)
{
while (table->name) {
table->target[0] = get_mail_conf_time(table->name, table->defval,
table->min, table->max);
table++;
}
}
#ifdef TEST
/*
* Stand-alone driver program for regression testing.
*/
#include <vstream.h>
int main(int unused_argc, char **unused_argv)
{
static int seconds;
static int minutes;
static int hours;
static int days;
static int weeks;
static const CONFIG_TIME_TABLE time_table[] = {
"seconds", "10s", &seconds, 0, 0,
"minutes", "10m", &minutes, 0, 0,
"hours", "10h", &hours, 0, 0,
"days", "10d", &days, 0, 0,
"weeks", "10w", &weeks, 0, 0,
0,
};
get_mail_conf_time_table(time_table);
vstream_printf("10 seconds = %d\n", seconds);
vstream_printf("10 minutes = %d\n", minutes);
vstream_printf("10 hours = %d\n", hours);
vstream_printf("10 days = %d\n", days);
vstream_printf("10 weeks = %d\n", weeks);
vstream_fflush(VSTREAM_OUT);
return (0);
}
#endif
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