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sendmail: update from maintainer

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This commit is contained in:
Denis Vlasenko 2008-02-08 18:24:54 +00:00
parent dc1c45795b
commit 6d52c1ee24
5 changed files with 472 additions and 242 deletions
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3
include/applets.h
View File

@ -151,6 +151,7 @@ USE_FBSET(APPLET(fbset, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
USE_FDFLUSH(APPLET_ODDNAME(fdflush, freeramdisk, _BB_DIR_BIN, _BB_SUID_NEVER, fdflush))
USE_FDFORMAT(APPLET(fdformat, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
USE_FDISK(APPLET(fdisk, _BB_DIR_SBIN, _BB_SUID_NEVER))
USE_FETCHMAIL(APPLET_ODDNAME(fetchmail, sendgetmail, _BB_DIR_USR_BIN, _BB_SUID_NEVER, fetchmail))
USE_FEATURE_GREP_FGREP_ALIAS(APPLET_NOUSAGE(fgrep, grep, _BB_DIR_BIN, _BB_SUID_NEVER))
USE_FIND(APPLET_NOEXEC(find, find, _BB_DIR_USR_BIN, _BB_SUID_NEVER, find))
//USE_FINDFS(APPLET_NOUSAGE(findfs, tune2fs, _BB_DIR_SBIN, _BB_SUID_NEVER))
@ -299,7 +300,7 @@ USE_RUNSV(APPLET(runsv, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
USE_RUNSVDIR(APPLET(runsvdir, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
USE_RX(APPLET(rx, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
USE_SED(APPLET(sed, _BB_DIR_BIN, _BB_SUID_NEVER))
USE_SENDMAIL(APPLET(sendmail, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
USE_SENDMAIL(APPLET_ODDNAME(sendmail, sendgetmail, _BB_DIR_USR_BIN, _BB_SUID_NEVER, sendmail))
USE_SELINUXENABLED(APPLET(selinuxenabled, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
USE_SEQ(APPLET_NOFORK(seq, seq, _BB_DIR_USR_BIN, _BB_SUID_NEVER, seq))
USE_SESTATUS(APPLET(sestatus, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))

45
include/usage.h
View File

@ -1017,6 +1017,19 @@ USE_FEATURE_BRCTL_FANCY("\n" \
" -S SECTORS Set the number of sectors\n" \
" -v Give fdisk version"
#define fetchmail_trivial_usage \
"[-C dir] [-w timeout] [-U user] -P password [-X] [-t] [-z] server[:port]"
#define fetchmail_full_usage \
"Fetch content of remote mailbox to local Maildir." \
"\n\nOptions:\n" \
" -C dir Set Maildir location\n" \
" -w timeout Set timeout on network operations\n" \
" -U username Authenticate with specified username\n" \
" -P password Authenticate with specified password\n" \
" -X Use openssl connection helper for secured servers\n" \
" -t Get only headers\n" \
" -z Delete messages on server"
#define find_trivial_usage \
"[PATH...] [EXPRESSION]"
#define find_full_usage \
@ -3138,29 +3151,21 @@ USE_FEATURE_RUN_PARTS_FANCY("\n -l Prints names of all matching files even when
#define selinuxenabled_full_usage
#define sendmail_trivial_usage \
"{-t to}+ {-f from} [-n[notify]] [-s subject] [-b file]*\n" \
"[-a attachment]* [-c charset]" \
USE_FEATURE_SENDMAIL_NETWORK("\n" \
" [-d] [-w timeout] [-h server] [-p port] [-U user] [-P password]" \
)
"[-C dir] [-w timeout] [-U user] [-P password] [-X]\n" \
"-t to [-t to] -f from [-n] [-s subject] [-c charset] server[:port] [body] [attachment ...]"
#define sendmail_full_usage \
"Send an email <from> <to> with <subject> and optional attachments." \
"\n\nArguments:\n" \
"Send an email with optional attachments." \
"\n\nOptions:\n" \
" -C dir Change current directory to dir\n" \
" -w timeout Set timeout on network operations\n" \
" -U username Authenticate with specified username\n" \
" -P password Authenticate with specified password\n" \
" -X Use openssl connection helper for secured servers\n" \
" -t to Recipient email. May be multiple\n" \
" -f from Sender address\n" \
" -n[notify] Optional notification address. If just -n given then notifies the sender\n" \
" -s subject Optional subject\n" \
" -b filename Optional body content file. May be multiple\n" \
" -a filename Optional file attachment. May be multiple\n" \
" -c charset Assumed charset for body and subject [koi8-r]" \
USE_FEATURE_SENDMAIL_NETWORK("\n" \
" -d Just dump composed message\n" \
" -w timeout Set timeout on network operations\n" \
" -h server Optional mail server name or IP [127.0.0.1]\n" \
" -p port Optional mail server port [25]\n" \
" -U username Authenticate using AUTH LOGIN with specified username\n" \
" -P password Authenticate using AUTH LOGIN with specified password" \
)
" -n Request delivery notification to sender\n" \
" -s subject Subject\n" \
" -c charset Assumed charset for body and subject [utf-8]"
#define seq_trivial_usage \
"[first [increment]] last"

35
networking/Config.in
View File

@ -671,12 +671,39 @@ config SENDMAIL
help
Barebones sendmail.
config FEATURE_SENDMAIL_NETWORK
bool "Support network connectivity"
default y
config FEATURE_SENDMAIL_EHLO
bool "Support EHLO command"
default n
depends on SENDMAIL
help
Add ability to send, not only compose messages.
Support ESMTP EHLO command.
config FEATURE_SENDMAIL_BLOATY
bool "Be more verbose"
default n
depends on SENDMAIL
help
Should be turned off.
config FETCHMAIL
bool "fetchmail"
default n
help
Barebones fetchmail.
config FEATURE_FETCHMAIL_APOP
bool "Support APOP authentication"
default y
depends on FETCHMAIL
help
Support secure APOP authentication.
config FEATURE_FETCHMAIL_FILTER
bool "Pipe thru external filter"
default n
depends on FETCHMAIL
help
Support piping incoming messages thru external filter.
config SLATTACH
bool "slattach"

1
networking/Kbuild
View File

@ -11,6 +11,7 @@ lib-$(CONFIG_BRCTL) += brctl.o
lib-$(CONFIG_DNSD) += dnsd.o
lib-$(CONFIG_ETHER_WAKE) += ether-wake.o
lib-$(CONFIG_FAKEIDENTD) += isrv_identd.o isrv.o
lib-$(CONFIG_FETCHMAIL) += sendmail.o
lib-$(CONFIG_FTPGET) += ftpgetput.o
lib-$(CONFIG_FTPPUT) += ftpgetput.o
lib-$(CONFIG_HOSTNAME) += hostname.o

630
networking/sendmail.c
View File

@ -1,6 +1,6 @@
/* vi: set sw=4 ts=4: */
/*
* bare bones sendmail
* bare bones sendmail/fetchmail
*
* Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
*
@ -8,23 +8,24 @@
*/
#include "libbb.h"
/*
Extracted from BB uuencode.c
*/
enum {
SRC_BUF_SIZE = 45, /* This *MUST* be a multiple of 3 */
DST_BUF_SIZE = 4 * ((SRC_BUF_SIZE + 2) / 3),
};
#define INITIAL_STDIN_FILENO 3
static void uuencode(char *fname, const char *text)
{
enum {
SRC_BUF_SIZE = 45, /* This *MUST* be a multiple of 3 */
DST_BUF_SIZE = 4 * ((SRC_BUF_SIZE + 2) / 3),
};
#define src_buf text
int fd;
#define len fd
char dst_buf[DST_BUF_SIZE + 1];
if (fname) {
fd = xopen(fname, O_RDONLY);
fd = INITIAL_STDIN_FILENO;
if (NOT_LONE_DASH(fname))
fd = xopen(fname, O_RDONLY);
src_buf = bb_common_bufsiz1;
} else {
len = strlen(text);
@ -44,69 +45,147 @@ static void uuencode(char *fname, const char *text)
}
if (!size)
break;
// Encode the buffer we just read in
// encode the buffer we just read in
bb_uuencode(dst_buf, src_buf, size, bb_uuenc_tbl_base64);
if (fname) {
xwrite(STDOUT_FILENO, "\n", 1);
xwrite(STDOUT_FILENO, "\r\n", 2);
} else {
src_buf += size;
len -= size;
}
xwrite(STDOUT_FILENO, dst_buf, 4 * ((size + 2) / 3));
}
if (ENABLE_FEATURE_CLEAN_UP && fname)
if (fname)
close(fd);
}
#if ENABLE_FEATURE_SENDMAIL_NETWORK
static pid_t helper_pid;
static void kill_helper(void)
{
// TODO!!!: is there more elegant way to terminate child on program failure?
if (helper_pid > 0)
kill(helper_pid, SIGTERM);
}
// generic signal handler
static void signal_handler(int signo)
{
int err;
if (SIGALRM == signo)
if (SIGALRM == signo) {
kill_helper();
bb_error_msg_and_die("timed out");
}
// SIGCHLD. reap zombies
if (wait_any_nohang(&err) > 0)
if (WIFEXITED(err) && WEXITSTATUS(err))
#if ENABLE_FEATURE_SENDMAIL_BLOATY
bb_error_msg_and_die("child exited (%d)", WEXITSTATUS(err));
#else
bb_error_msg_and_die("child failed");
#endif
}
static pid_t helper_pid;
static void launch_helper(const char **argv)
{
// setup vanilla unidirectional pipes interchange
int idx;
int pipes[4];
xpipe(pipes);
xpipe(pipes+2);
helper_pid = vfork();
if (helper_pid < 0)
bb_perror_msg_and_die("vfork");
idx = (!helper_pid)*2;
xdup2(pipes[idx], STDIN_FILENO);
xdup2(pipes[3-idx], STDOUT_FILENO);
if (ENABLE_FEATURE_CLEAN_UP)
for (int i = 4; --i >= 0; )
if (pipes[i] > STDOUT_FILENO)
close(pipes[i]);
if (!helper_pid) {
// child - try to execute connection helper
BB_EXECVP(argv[0], (char **)argv);
_exit(127);
}
// parent - check whether child is alive
sig_catch(SIGCHLD, signal_handler);
sig_catch(SIGALRM, signal_handler);
signal_handler(SIGCHLD);
// child seems OK -> parent goes on
}
// read stdin, parses first bytes to a number, i.e. server response
// if code = -1 then just return this number
// if code != -1 then checks whether the number equals the code
// if not equal -> die saying errmsg
static int check(int code, const char *errmsg)
static unsigned timeout;
static char *command(const char *fmt, const char *param)
{
char *msg = (char *)fmt;
alarm(timeout);
if (msg) {
// if (param)
msg = xasprintf(fmt, param);
printf("%s\r\n", msg);
}
fflush(stdout);
return msg;
}
static int smtp_checkp(const char *fmt, const char *param, int code)
{
char *answer;
// read a string and match it against the set of available answers
fflush(stdout);
char *msg = command(fmt, param);
// read stdin
// if the string has a form \d\d\d- -- read next string. E.g. EHLO response
// parse first bytes to a number
// if code = -1 then just return this number
// if code != -1 then checks whether the number equals the code
// if not equal -> die saying msg
#if ENABLE_FEATURE_SENDMAIL_EHLO
while ((answer = xmalloc_getline(stdin)) && '-' == answer[3]) ;
#else
answer = xmalloc_getline(stdin);
#endif
if (answer) {
int n = atoi(answer);
if (-1 == code || n == code) {
alarm(0);
if (ENABLE_FEATURE_CLEAN_UP) {
free(msg);
free(answer);
}
if (-1 == code || n == code) {
return n;
}
}
// TODO: is there more elegant way to terminate child on program failure?
if (helper_pid > 0)
kill(helper_pid, SIGTERM);
if (!answer)
answer = (char*)"EOF";
else
*strchrnul(answer, '\r') = '\0';
bb_error_msg_and_die("error at %s: got '%s' instead", errmsg, answer);
kill_helper();
bb_error_msg_and_die("%s failed", msg);
}
static int puts_and_check(const char *msg, int code, const char *errmsg)
static int smtp_check(const char *fmt, int code)
{
printf("%s\r\n", msg);
return check(code, errmsg);
return smtp_checkp(fmt, NULL, code);
}
static void pop3_checkr(const char *fmt, const char *param, char **ret)
{
char *msg = command(fmt, param);
char *answer = xmalloc_getline(stdin);
if (answer && '+' == answer[0]) {
alarm(0);
if (ret)
*ret = answer;
else
free(answer);
return;
}
kill_helper();
bb_error_msg_and_die("%s failed", msg);
}
static void pop3_check(const char *fmt, const char *param)
{
pop3_checkr(fmt, param, NULL);
}
// strip argument of bad chars
@ -123,215 +202,332 @@ static char *sane(char *str)
*p = '\0';
return str;
}
#endif
int sendmail_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int sendmail_main(int argc, char **argv)
static void pop3_message(int fd)
{
char *answer;
// read stdin, copy to file fd
while ((answer = xmalloc_fgets_str(stdin, "\r\n"))) {
char *s = answer;
if ('.' == answer[0]) {
if ('.' == answer[1])
s++;
else if ('\r' == answer[1] && '\n' == answer[2] && '\0' == answer[3])
break;
}
xwrite(fd, s, strlen(s));
free(answer);
}
close(fd);
}
static const char *args[] = {
"openssl", "s_client", "-quiet", "-connect", NULL, "-tls1", "-starttls", "smtp", NULL
};
#define opt_connect args[4]
#define opt_after_connect args[5]
int sendgetmail_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int sendgetmail_main(int argc, char **argv)
{
llist_t *recipients = NULL;
llist_t *bodies = NULL;
llist_t *attachments = NULL;
char *from;
char *notify = NULL;
const char *subject;
char *charset = (char*)"utf-8";
#if ENABLE_FEATURE_SENDMAIL_NETWORK
const char *wsecs = "10";
const char *server = "127.0.0.1";
const char *port = NULL;
char *charset = (char *)"utf-8";
const char *opt_user;
const char *opt_pass;
unsigned timeout;
#endif
char *boundary;
unsigned opts;
const char *opt_timeout;
const char *opt_chdir;
enum {
OPT_f = 1 << 0, // sender
OPT_n = 1 << 2, // notification
OPT_s = 1 << 3, // subject given
OPT_c = 1 << 6, // charset
OPT_d = 1 << 7, // dry run - no networking
OPT_w = 1 << 8, // network timeout
OPT_h = 1 << 9, // server
OPT_p = 1 << 10, // port
OPT_U = 1 << 11, // user specified
OPT_P = 1 << 12, // password specified
OPT_C = 1 << 0, // chdir
OPT_w = 1 << 1, // network timeout
OPT_U = 1 << 2, // user
OPT_P = 1 << 3, // password
OPT_X = 1 << 4, // use openssl connection helper
OPTS_t = 1 << 5, // sendmail "to"
OPTF_t = 1 << 5, // fetchmail "TOP"
OPTS_f = 1 << 6, // sendmail "from"
OPTF_z = 1 << 6, // fetchmail "delete"
OPTS_n = 1 << 7, // notification
OPTS_s = 1 << 8, // subject given
OPTS_c = 1 << 9, // charset for subject and body
};
// -f must be specified
// -t, -b, -a may be multiple
opt_complementary = "f:t::b::a::";
opts = getopt32(argv,
"f:t:n::s:b:a:c:" USE_FEATURE_SENDMAIL_NETWORK("dw:h:p:U:P:"),
&from, &recipients, &notify, &subject, &bodies, &attachments, &charset
USE_FEATURE_SENDMAIL_NETWORK(, &wsecs, &server, &port, &opt_user, &opt_pass)
const char *options;
unsigned opts;
// SENDMAIL
if ('s' == applet_name[0]) {
// save initial stdin
xdup2(STDIN_FILENO, INITIAL_STDIN_FILENO);
// -f must be specified
// -t may be multiple
opt_complementary = "-1:f:t::";
options = "C:w:U:P:X" "t:f:ns:c:";
// FETCHMAIL
} else {
opt_after_connect = NULL;
opt_complementary = "=1:P";
options = "C:w:U:P:X" "tz";
}
opts = getopt32(argv, options,
&opt_chdir, &opt_timeout, &opt_user, &opt_pass,
&recipients, &from, &subject, &charset
);
//argc -= optind;
argv += optind;
// sanitize user input
sane(from);
if (opts & OPT_c)
sane(charset);
// first argument is remote server[:port]
opt_connect = *argv++;
// establish connection
#if ENABLE_FEATURE_SENDMAIL_NETWORK
timeout = xatou(wsecs);
if (!(opts & OPT_d)) {
// ask password if we need to and while we're still have terminal
// TODO: get password directly from /dev/tty? or from a secret file?
if ((opts & (OPT_U+OPT_P)) == OPT_U) {
if (!isatty(STDIN_FILENO) || !(opt_pass = bb_askpass(0, "Password: "))) {
bb_error_msg_and_die("no password");
}
}
// set chat timeout
alarm(timeout);
// connect to server
if (argv[0]) {
// if connection helper given
// setup vanilla unidirectional pipes interchange
int idx;
int pipes[4];
xpipe(pipes);
xpipe(pipes+2);
helper_pid = vfork();
if (helper_pid < 0)
bb_perror_msg_and_die("vfork");
idx = (!helper_pid)*2;
xdup2(pipes[idx], STDIN_FILENO);
xdup2(pipes[3-idx], STDOUT_FILENO);
if (ENABLE_FEATURE_CLEAN_UP)
for (int i = 4; --i >= 0;)
if (pipes[i] > STDOUT_FILENO)
close(pipes[i]);
// replace child with connection helper
if (!helper_pid) {
// child - try to execute connection helper
BB_EXECVP(argv[0], argv);
_exit(127);
}
// parent - check whether child is alive
sig_catch(SIGCHLD, signal_handler);
sig_catch(SIGALRM, signal_handler);
signal_handler(SIGCHLD);
// child seems OK -> parent goes on SMTP chat
} else {
// no connection helper provided -> make plain connect
int fd = create_and_connect_stream_or_die(
server,
bb_lookup_port(port, "tcp", 25)
);
xmove_fd(fd, STDIN_FILENO);
xdup2(STDIN_FILENO, STDOUT_FILENO);
// wait for OK
check(220, "INIT");
}
// mail user specified? try modern AUTHentication
if ((opts & OPT_U)
&& (334 == puts_and_check("auth login", -1, "auth login"))
) {
uuencode(NULL, opt_user);
puts_and_check("", 334, "AUTH");
uuencode(NULL, opt_pass);
puts_and_check("", 235, "AUTH");
// no mail user specified or modern AUTHentication is not supported?
} else {
// fallback to simple HELO authentication
// fetch domain name (defaults to local)
const char *domain = strchr(from, '@');
if (domain)
domain++;
else
domain = "local";
printf("helo %s\r\n", domain);
check(250, "HELO");
if (opts & OPT_w)
timeout = xatou(opt_timeout);
// chdir
if (opts & OPT_C)
xchdir(opt_chdir);
// connect to server
if (opts & OPT_X) {
launch_helper(args);
} else {
// no connection helper provided -> make plain connect
int fd = create_and_connect_stream_or_die(opt_connect, 0);
xmove_fd(fd, STDIN_FILENO);
xdup2(STDIN_FILENO, STDOUT_FILENO);
}
// randomize
srand(time(NULL));
// SENDMAIL
if (recipients) {
int code;
char *boundary;
// wait for initial OK on plain connect
if (!(opts & OPT_X))
smtp_check(NULL, 220);
sane(from);
// introduce to server
// should we respect modern (but useless here) EHLO?
// or should they respect we wanna be tiny?!
if (!ENABLE_FEATURE_SENDMAIL_EHLO || 250 != smtp_checkp("EHLO %s", from, -1)) {
smtp_checkp("HELO %s", from, 250);
}
// set addresses
printf("mail from:<%s>\r\n", from);
check(250, "MAIL FROM");
// set sender
// NOTE: if password has not been specified ->
// no authentication is possible
code = (opts & OPT_P) ? -1 : 250;
// first try softly without authentication
while (250 != smtp_checkp("MAIL FROM:<%s>", from, code)) {
// MAIL FROM failed -> authentication needed
// do we have username?
if (!(opts & OPT_U)) {
// no! fetch it from "from" option
//opts |= OPT_U;
opt_user = xstrdup(from);
*strchrnul(opt_user, '@') = '\0';
}
// now it seems we have username
// try to authenticate
if (334 == smtp_check("AUTH LOGIN", -1)) {
uuencode(NULL, opt_user);
smtp_check("", 334);
uuencode(NULL, opt_pass);
smtp_check("", 235);
}
// authenticated -> retry set sender
// but now die on failure
code = 250;
}
// set recipients
for (llist_t *to = recipients; to; to = to->link) {
printf("rcpt to:<%s>\r\n", sane(to->data));
check(250, "RCPT TO");
smtp_checkp("RCPT TO:<%s>", sane(to->data), 250);
}
puts_and_check("data", 354, "DATA");
// no timeout while sending message
alarm(0);
}
#endif
// now put message
// put address headers
printf("From: %s\r\n", from);
for (llist_t *to = recipients; to; to = to->link) {
printf("To: %s\r\n", sane(to->data));
}
// put encoded subject
if (opts & OPT_s) {
printf("Subject: =?%s?B?", charset);
uuencode(NULL, subject);
puts("?=\r");
}
// put notification
if (opts & OPT_n) {
// -n without parameter?
if (!notify)
notify = from; // notify sender by default
printf("Disposition-Notification-To: %s\r\n", sane(notify));
}
// put common headers and body start
//srand(?);
boundary = xasprintf("%d-%d-%d", rand(), rand(), rand());
printf(
"X-Mailer: busybox " BB_VER " sendmail\r\n"
"Message-ID: <%s>\r\n"
"Mime-Version: 1.0\r\n"
"%smultipart/mixed; boundary=\"%s\"\r\n"
"\r\n"
"--%s\r\n"
"%stext/plain; charset=%s\r\n"
"%s\r\n%s"
, boundary
, "Content-Type: "
, boundary, boundary
, "Content-Type: "
, charset
, "Content-Disposition: inline"
, "Content-Transfer-Encoding: base64\r\n"
);
// put body(ies)
for (llist_t *f = bodies; f; f = f->link) {
uuencode(f->data, NULL);
}
// put attachment(s)
for (llist_t *f = attachments; f; f = f->link) {
// now put message
smtp_check("DATA", 354);
// put address headers
printf("From: %s\r\n", from);
for (llist_t *to = recipients; to; to = to->link) {
printf("To: %s\r\n", to->data);
}
// put encoded subject
if (opts & OPTS_c)
sane(charset);
if (opts & OPTS_s) {
printf("Subject: =?%s?B?", charset);
uuencode(NULL, subject);
printf("?=\r\n");
}
// put notification
if (opts & OPTS_n)
printf("Disposition-Notification-To: %s\r\n", from);
// put common headers and body start
boundary = xasprintf("%d-%d-%d", rand(), rand(), rand());
printf(
"\r\n--%s\r\n"
"%sapplication/octet-stream\r\n"
"%s; filename=\"%s\"\r\n"
"%s"
USE_FEATURE_SENDMAIL_BLOATY("X-Mailer: busybox " BB_VER " sendmail\r\n")
"Message-ID: <%s>\r\n"
"Mime-Version: 1.0\r\n"
"%smultipart/mixed; boundary=\"%s\"\r\n"
, boundary
, "Content-Type: "
, "Content-Disposition: inline"
, bb_get_last_path_component_strip(f->data)
, "Content-Transfer-Encoding: base64\r\n"
, boundary
);
uuencode(f->data, NULL);
// put body + attachment(s)
{
const char *fmt =
"\r\n--%s\r\n"
"%stext/plain; charset=%s\r\n"
"%s%s\r\n"
"%s"
;
const char *p = charset;
char *q = (char *)"";
while (argv[0]) {
printf(
fmt
, boundary
, "Content-Type: "
, p
, "Content-Disposition: inline"
, q
, "Content-Transfer-Encoding: base64\r\n"
);
p = "";
fmt =
"\r\n--%s\r\n"
"%sapplication/octet-stream%s\r\n"
"%s; filename=\"%s\"\r\n"
"%s"
;
uuencode(*argv, NULL);
if (*(++argv))
q = bb_get_last_path_component_strip(argv[0]);
}
}
// put terminator
printf("\r\n--%s--\r\n\r\n", boundary);
if (ENABLE_FEATURE_CLEAN_UP)
free(boundary);
// put terminator
printf("\r\n--%s--\r\n" "\r\n", boundary);
if (ENABLE_FEATURE_CLEAN_UP)
free(boundary);
#if ENABLE_FEATURE_SENDMAIL_NETWORK
// end message and say goodbye
if (!(opts & OPT_d)) {
alarm(timeout);
puts_and_check(".", 250, "BODY");
puts_and_check("quit", 221, "QUIT");
}
// end message and say goodbye
smtp_check(".", 250);
smtp_check("QUIT", 221);
// FETCHMAIL
} else {
// authenticate
char *buf;
unsigned nmsg;
if (!(opts & OPT_U)) {
//opts |= OPT_U;
opt_user = getenv("USER");
}
#if ENABLE_FEATURE_FETCHMAIL_APOP
pop3_checkr(NULL, NULL, &buf);
// server supports APOP?
if ('<' == buf[4]) {
md5_ctx_t md5;
uint8_t hex[16*2 + 1];
// yes. compose <stamp><password>
char *s = strchr(buf, '>');
if (s)
strcpy(s+1, opt_pass);
s = buf+4;
// get md5 sum of <stamp><password>
md5_begin(&md5);
md5_hash(s, strlen(s), &md5);
md5_end(s, &md5);
bin2hex(hex, s, 16);
// APOP
s = xasprintf("%s %s", opt_user, hex);
pop3_check("APOP %s", s);
if (ENABLE_FEATURE_CLEAN_UP) {
free(s);
free(buf);
}
} else {
#else
{
pop3_check(NULL, NULL);
#endif
// USER
pop3_check("USER %s", opt_user);
// PASS
pop3_check("PASS %s", opt_pass);
}
// get statistics
pop3_checkr("STAT", NULL, &buf);
// get number of messages
nmsg = atoi(buf+4);
if (ENABLE_FEATURE_CLEAN_UP)
free(buf);
// lock maildir
////USE_FEATURE_CLEAN_UP(close)(xopen(".lock", O_CREAT | O_WRONLY | O_TRUNC | O_EXCL));
// make tempnam(dir, salt) respect dir argument
unsetenv("TMPDIR");
// TODO: piping thru external filter argv... if *argv
// cache fetch command
{
const char *retr = (opts & OPTF_t) ? "TOP %u 0" : "RETR %u";
// loop thru messages
for (; nmsg; nmsg--) {
int fd;
char tmp_name[sizeof("tmp/XXXXXX")];
char new_name[sizeof("new/XXXXXX")];
// retrieve message in ./tmp
strcpy(tmp_name, "tmp/XXXXXX");
fd = mkstemp(tmp_name);
if (fd < 0)
bb_perror_msg_and_die("cannot create unique file");
pop3_check(retr, (const char *)nmsg);
pop3_message(fd); // NB: closes fd
// move file to ./new atomically
strncpy(new_name, "new", 3);
strcpy(new_name + 3, tmp_name + 3);
if (rename(tmp_name, new_name) < 0) {
// rats! such file exists! try to make unique name
strcpy(new_name + 3, "tmp/XXXXXX" + 3);
fd = mkstemp(new_name);
if (fd < 0)
bb_perror_msg_and_die("cannot create unique file");
close(fd);
if (rename(tmp_name, new_name) < 0) {
// something is very wrong
bb_perror_msg_and_die("cannot move %s to %s", tmp_name, new_name);
}
}
// delete message from server
if (opts & OPTF_z)
pop3_check("DELE %u", (const char*)nmsg);
}
}
// Bye
pop3_check("QUIT", NULL);
// unlock maildir
////unlink(".lock");
}
return 0;
}