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/*
NAME
testclient - test imap client library using GNU imap4d
SYNOPSIS
testclient CONFIG_FILE CLIENT_COMMAND
DESCRIPTION
Auxiliary tool for testing the mailutils IMAP client library.
Arguments are:
CONFIG_FILE - name of the imap4d configuration file
CLIENT_COMMAND - command to run.
The tool finds first unused TCP port on localhost and starts
listening on that port in the background. When a connection
arrives, it starts imap4d in inetd mode with the given
configuratiom file.
The master process then adds the following two variables to the
environment:
PORT - port number it is listening on
URL - mailutils URL (imap://127.0.0.1:$PORT)
Finally, it executes /bin/sh -c CLIENT_COMMAND. The client
command is supposed to connect to the port and issue some IMAP
commands.
The program imposes a 60 second timeout on the execution time.
LICENSE
Copyright (C) 2021-2025 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <errno.h>
#include <unistd.h>
#include <sysexits.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <string.h>
char const *progname;
static void
error (int exit_code, int error_code, char const *fmt, ...)
{
va_list ap;
fprintf (stderr, "%s: ", progname);
va_start (ap, fmt);
vfprintf (stderr, fmt, ap);
va_end (ap);
if (error_code)
fprintf (stderr, ": %s", strerror (error_code));
fputc ('\n', stderr);
if (exit_code)
exit (exit_code);
}
static int
listener_setup (char *scheme)
{
struct addrinfo *ap, hints;
socklen_t len;
int fd;
int i;
char serv[80];
char urlbuf[93];
/* Find first free port */
memset (&hints, 0, sizeof (hints));
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = 0;
hints.ai_family = AF_INET;
if ((i = getaddrinfo ("127.0.0.1", NULL, &hints, &ap)) != 0)
error (EX_OSERR, errno, "getaddrinfo: %s", gai_strerror (i));
fd = socket (PF_INET, SOCK_STREAM, 0);
if (fd < 0)
error (EX_OSERR, errno, "socket");
i = 1;
setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, &i, sizeof (i));
((struct sockaddr_in*)ap->ai_addr)->sin_port = 0;
if (bind (fd, ap->ai_addr, ap->ai_addrlen) < 0)
error (EX_OSERR, errno, "bind");
if (listen (fd, 8) == -1)
error (EX_OSERR, errno, "listen");
len = ap->ai_addrlen;
if (getsockname (fd, ap->ai_addr, &len))
error(EX_OSERR, errno, "getsockname");
/* Prepare environment */
if ((i = getnameinfo (ap->ai_addr, len, NULL, 0, serv, sizeof serv,
NI_NUMERICSERV)) != 0)
error (EX_OSERR, errno, "getnameinfo: %s", gai_strerror (i));
setenv ("PORT", serv, 1);
snprintf (urlbuf, sizeof urlbuf, "%s://127.0.0.1:%s", scheme, serv);
setenv ("URL", urlbuf, 1);
return fd;
}
void
usage (void)
{
printf ("usage: %s CONFIG_FILE COMMAND\n", progname);
}
int
main (int argc, char **argv)
{
int lfd;
pid_t pid;
progname = argv[0];
if (argc != 3)
{
usage ();
exit (EX_USAGE);
}
lfd = listener_setup ("imap");
pid = fork ();
if (pid == -1)
error (EX_OSERR, errno, "fork");
if (pid == 0)
{
/* Run server */
int fd;
char *sargv[] = {
"imap4d",
"--inetd",
"--preauth",
"--foreground",
"--no-config",
"--config-file",
argv[1],
"--set",
".logging.syslog=off",
NULL
};
struct sockaddr_in sin;
socklen_t len = sizeof sin;
alarm (60);//FIXME
fd = accept (lfd, (struct sockaddr *)&sin, &len);
if (fd == -1)
error (EX_OSERR, errno, "accept");
dup2 (fd, 0);
dup2 (fd, 1);
if (fd > 1)
close (fd);
close (lfd);
execvp (sargv[0], sargv);
_exit (127);
}
execlp ("/bin/sh", "/bin/sh", "-c", argv[2], NULL);
error (EX_OSERR, errno, "execlp");
}
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