static char *
hesiod_get_pobox (const char **user)
{
char *ret = NULL;
struct hes_postoffice *hpo;
hpo = hes_getmailhost (*user);
if (hpo == NULL) {
warn ("hes_getmailhost %s", *user);
} else {
if (strcasecmp(hpo->po_type, "pop") != 0)
errx (1, "Unsupported po type %s", hpo->po_type);
ret = estrdup(hpo->po_host);
*user = estrdup(hpo->po_name);
}
return ret;
}
/*
* Function: pop_open (char *host, char *username, char *password,
* int flags)
*
* Purpose: Establishes a connection with a post-office server, and
* completes the authorization portion of the session.
*
* Arguments:
* host The server host with which the connection should be
* established. Optional. If omitted, internal
* heuristics will be used to determine the server host,
* if possible.
* username
* The username of the mail-drop to access. Optional.
* If omitted, internal heuristics will be used to
* determine the username, if possible.
* password
* The password to use for authorization. If omitted,
* internal heuristics will be used to determine the
* password, if possible.
* flags A bit mask containing flags controlling certain
* functions of the routine. Valid flags are defined in
* the file pop.h
*
* Return value: Upon successful establishment of a connection, a
* non-null popserver will be returned. Otherwise, null will be
* returned, and the string variable pop_error will contain an
* explanation of the error.
*/
popserver
pop_open (char *host, char *username, char *password, int flags)
{
int sock;
popserver server;
/* Determine the user name */
if (! username)
{
username = getenv ("USER");
if (! (username && *username))
{
username = getlogin ();
if (! (username && *username))
{
struct passwd *passwd;
passwd = getpwuid (getuid ());
if (passwd && passwd->pw_name && *passwd->pw_name)
{
username = passwd->pw_name;
}
else
{
strcpy (pop_error, "Could not determine username");
return (0);
}
}
}
}
/*
* Determine the mail host.
*/
if (! host)
{
host = getenv ("MAILHOST");
}
#ifdef HESIOD
if ((! host) && (! (flags & POP_NO_HESIOD)))
{
struct hes_postoffice *office;
office = hes_getmailhost (username);
if (office && office->po_type && (! strcmp (office->po_type, "POP"))
&& office->po_name && *office->po_name && office->po_host
&& *office->po_host)
{
host = office->po_host;
username = office->po_name;
}
}
#endif
#ifdef MAILHOST
if (! host)
{
host = MAILHOST;
}
#endif
if (! host)
{
strcpy (pop_error, "Could not determine POP server");
return (0);
}
/* Determine the password */
#ifdef KERBEROS
#define DONT_NEED_PASSWORD (! (flags & POP_NO_KERBEROS))
#else
#define DONT_NEED_PASSWORD 0
#endif
if ((! password) && (! DONT_NEED_PASSWORD))
{
if (! (flags & POP_NO_GETPASS))
{
password = getpass ("Enter POP password:"******"Could not determine POP password");
return (0);
}
}
if (password) /* always true, detected 20060515 */
flags |= POP_NO_KERBEROS;
else
password = username; /* dead code, detected 20060515 */
/** "kpop" service is never used: look for 20060515 to see why **/
sock = socket_connection (host, flags);
if (sock == -1)
return (0);
server = (popserver) malloc (sizeof (struct _popserver));
if (! server)
{
strcpy (pop_error, "Out of memory in pop_open");
return (0);
}
server->buffer = (char *) malloc (GETLINE_MIN);
if (! server->buffer)
{
strcpy (pop_error, "Out of memory in pop_open");
free ((char *) server);
return (0);
}
server->file = sock;
server->data = 0;
server->buffer_index = 0;
server->buffer_size = GETLINE_MIN;
server->in_multi = false;
server->trash_started = false;
if (getok (server))
return (0);
/*
* I really shouldn't use the pop_error variable like this, but....
*/
if (strlen (username) > ERROR_MAX - 6)
{
pop_close (server);
strcpy (pop_error,
"Username too long; recompile pop.c with larger ERROR_MAX");
return (0);
}
sprintf (pop_error, "USER %s", username);
if (sendline (server, pop_error) || getok (server))
{
return (0);
}
if (strlen (password) > ERROR_MAX - 6)
{
pop_close (server);
strcpy (pop_error,
"Password too long; recompile pop.c with larger ERROR_MAX");
return (0);
}
sprintf (pop_error, "PASS %s", password);
if (sendline (server, pop_error) || getok (server))
{
return (0);
}
return (server);
}