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/*++
/* NAME
/* postconf_main 3
/* SUMMARY
/* basic support for main.cf
/* SYNOPSIS
/* #include <postconf.h>
/*
/* void pcf_read_parameters()
/*
/* void pcf_show_parameters(fp, mode, param_class, names)
/* VSTREAM *fp;
/* int mode;
/* int param_class;
/* char **names;
/* DESCRIPTION
/* pcf_read_parameters() reads parameters from main.cf.
/*
/* pcf_set_parameters() takes an array of \fIname=value\fR
/* pairs and overrides settings read with pcf_read_parameters().
/*
/* pcf_show_parameters() writes main.cf parameters to the
/* specified output stream.
/*
/* Arguments:
/* .IP fp
/* Output stream.
/* .IP mode
/* Bit-wise OR of zero or more of the following:
/* .RS
/* .IP PCF_FOLD_LINE
/* Fold long lines.
/* .IP PCF_SHOW_DEFS
/* Output default parameter values.
/* .IP PCF_SHOW_NONDEF
/* Output explicit settings only.
/* .IP PCF_HIDE_NAME
/* Output parameter values without the "name =" prefix.
/* .IP PCF_SHOW_EVAL
/* Expand $name in parameter values.
/* .RE
/* .IP param_class
/* Bit-wise OR of one or more of the following:
/* .RS
/* .IP PCF_PARAM_FLAG_BUILTIN
/* Show built-in parameters.
/* .IP PCF_PARAM_FLAG_SERVICE
/* Show service-defined parameters.
/* .IP PCF_PARAM_FLAG_USER
/* Show user-defined parameters.
/* .RE
/* .IP names
/* List of zero or more parameter names. If the list is empty,
/* output all parameters.
/* DIAGNOSTICS
/* Problems are reported to the standard error stream.
/* 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 <stdarg.h>
#include <stdlib.h>
#include <string.h>
/* Utility library. */
#include <msg.h>
#include <mymalloc.h>
#include <vstream.h>
#include <vstring.h>
#include <readlline.h>
#include <dict.h>
#include <stringops.h>
#include <htable.h>
#include <mac_expand.h>
/* Global library. */
#include <mail_params.h>
#include <mail_conf.h>
/* Application-specific. */
#include <postconf.h>
#define STR(x) vstring_str(x)
/* pcf_read_parameters - read parameter info from file */
void pcf_read_parameters(void)
{
const char *path;
/*
* A direct rip-off of mail_conf_read(). XXX Avoid code duplication by
* better code decomposition.
*/
path = pcf_get_main_path();
if (dict_load_file_xt(CONFIG_DICT, path) == 0)
msg_fatal("open %s: %m", path);
}
/* pcf_set_parameters - add or override name=value pairs */
void pcf_set_parameters(char **name_val_array)
{
char *name, *value, *junk;
const char *err;
char **cpp;
for (cpp = name_val_array; *cpp; cpp++) {
junk = mystrdup(*cpp);
if ((err = split_nameval(junk, &name, &value)) != 0)
msg_fatal("invalid parameter override: %s: %s", *cpp, err);
mail_conf_update(name, value);
myfree(junk);
}
}
/* pcf_print_parameter - show specific parameter */
static void pcf_print_parameter(VSTREAM *fp, int mode, const char *name,
PCF_PARAM_NODE *node)
{
static VSTRING *exp_buf = 0;
const char *value;
if (exp_buf == 0)
exp_buf = vstring_alloc(100);
/*
* Use the default or actual value.
*/
value = pcf_lookup_parameter_value(mode, name, (PCF_MASTER_ENT *) 0, node);
/*
* Optionally expand $name in the parameter value. Print the result with
* or without the name= prefix.
*/
if (value != 0) {
if (mode & PCF_HIDE_VALUE) {
pcf_print_line(fp, mode, "%s\n", name);
} else {
if ((mode & PCF_SHOW_EVAL) != 0 && PCF_RAW_PARAMETER(node) == 0)
value = pcf_expand_parameter_value(exp_buf, mode, value,
(PCF_MASTER_ENT *) 0);
if ((mode & PCF_HIDE_NAME) == 0) {
pcf_print_line(fp, mode, "%s = %s\n", name, value);
} else {
pcf_print_line(fp, mode, "%s\n", value);
}
}
if (msg_verbose)
vstream_fflush(fp);
}
}
/* pcf_comp_names - qsort helper */
static int pcf_comp_names(const void *a, const void *b)
{
PCF_PARAM_INFO **ap = (PCF_PARAM_INFO **) a;
PCF_PARAM_INFO **bp = (PCF_PARAM_INFO **) b;
return (strcmp(PCF_PARAM_INFO_NAME(ap[0]),
PCF_PARAM_INFO_NAME(bp[0])));
}
/* pcf_show_parameters - show parameter info */
void pcf_show_parameters(VSTREAM *fp, int mode, int param_class, char **names)
{
PCF_PARAM_INFO **list;
PCF_PARAM_INFO **ht;
char **namep;
PCF_PARAM_NODE *node;
/*
* Show all parameters.
*/
if (*names == 0) {
list = PCF_PARAM_TABLE_LIST(pcf_param_table);
qsort((void *) list, pcf_param_table->used, sizeof(*list),
pcf_comp_names);
for (ht = list; *ht; ht++)
if (param_class & PCF_PARAM_INFO_NODE(*ht)->flags)
pcf_print_parameter(fp, mode, PCF_PARAM_INFO_NAME(*ht),
PCF_PARAM_INFO_NODE(*ht));
myfree((void *) list);
return;
}
/*
* Show named parameters.
*/
for (namep = names; *namep; namep++) {
if ((node = PCF_PARAM_TABLE_FIND(pcf_param_table, *namep)) == 0) {
msg_warn("%s: unknown parameter", *namep);
} else {
pcf_print_parameter(fp, mode, *namep, node);
}
}
}
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