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/*++
/* NAME
/* dict_env 3
/* SUMMARY
/* dictionary manager interface to environment variables
/* SYNOPSIS
/* #include <dict_env.h>
/*
/* DICT *dict_env_open(name, dummy, dict_flags)
/* const char *name;
/* int dummy;
/* int dict_flags;
/* DESCRIPTION
/* dict_env_open() opens the environment variable array and
/* makes it accessible via the generic operations documented
/* in dict_open(3). The \fIname\fR and \fIdummy\fR arguments
/* are ignored.
/* SEE ALSO
/* dict(3) generic dictionary manager
/* safe_getenv(3) safe getenv() interface
/* 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 <stdio.h> /* sprintf() prototype */
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
/* Utility library. */
#include "mymalloc.h"
#include "msg.h"
#include "safe.h"
#include "stringops.h"
#include "dict.h"
#include "dict_env.h"
/* dict_env_update - update environment array */
static int dict_env_update(DICT *dict, const char *name, const char *value)
{
dict->error = 0;
/*
* Optionally fold the key.
*/
if (dict->flags & DICT_FLAG_FOLD_FIX) {
if (dict->fold_buf == 0)
dict->fold_buf = vstring_alloc(10);
vstring_strcpy(dict->fold_buf, name);
name = lowercase(vstring_str(dict->fold_buf));
}
if (setenv(name, value, 1))
msg_fatal("setenv: %m");
return (DICT_STAT_SUCCESS);
}
/* dict_env_lookup - access environment array */
static const char *dict_env_lookup(DICT *dict, const char *name)
{
dict->error = 0;
/*
* Optionally fold the key.
*/
if (dict->flags & DICT_FLAG_FOLD_FIX) {
if (dict->fold_buf == 0)
dict->fold_buf = vstring_alloc(10);
vstring_strcpy(dict->fold_buf, name);
name = lowercase(vstring_str(dict->fold_buf));
}
return (safe_getenv(name));
}
/* dict_env_close - close environment dictionary */
static void dict_env_close(DICT *dict)
{
if (dict->fold_buf)
vstring_free(dict->fold_buf);
dict_free(dict);
}
/* dict_env_open - make association with environment array */
DICT *dict_env_open(const char *name, int unused_flags, int dict_flags)
{
DICT *dict;
dict = dict_alloc(DICT_TYPE_ENVIRON, name, sizeof(*dict));
dict->lookup = dict_env_lookup;
dict->update = dict_env_update;
dict->close = dict_env_close;
dict->flags = dict_flags | DICT_FLAG_FIXED;
if (dict_flags & DICT_FLAG_FOLD_FIX)
dict->fold_buf = vstring_alloc(10);
dict->owner.status = DICT_OWNER_TRUSTED;
return (DICT_DEBUG (dict));
}
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