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-rw-r--r--networking/Config.in21
-rw-r--r--networking/sendmail.c315
2 files changed, 202 insertions, 134 deletions
diff --git a/networking/Config.in b/networking/Config.in
index f23ca47..1984297 100644
--- a/networking/Config.in
+++ b/networking/Config.in
@@ -687,6 +687,27 @@ config SENDMAIL
help
Barebones sendmail.
+config FEATURE_SENDMAIL_MAILX
+ bool "Allow to specify subject, attachments and their charset"
+ default y
+ depends on SENDMAIL
+ help
+ Allow to specify subject, attachments and their charset.
+
+config FEATURE_SENDMAIL_SSL
+ bool "Allow to communicate via SSL/TLS"
+ default y
+ depends on SENDMAIL
+ help
+ Allow to use secure connections provided by openssl. E.g. @gmail.com.
+
+config FEATURE_SENDMAIL_CHARSET
+ string "Default charset"
+ default "utf-8"
+ depends on SENDMAIL
+ help
+ Default charset of the message.
+
config FETCHMAIL
bool "fetchmail"
default n
diff --git a/networking/sendmail.c b/networking/sendmail.c
index c605d7c..6d00026 100644
--- a/networking/sendmail.c
+++ b/networking/sendmail.c
@@ -8,7 +8,38 @@
*/
#include "libbb.h"
-#define INITIAL_STDIN_FILENO 3
+struct globals {
+ pid_t helper_pid;
+ unsigned timeout;
+ FILE *fp0; // initial stdin
+ // arguments for SSL connection helper
+ const char *xargs[9];
+ // arguments for postprocess helper
+ const char *fargs[3];
+};
+#define G (*ptr_to_globals)
+#define helper_pid (G.helper_pid)
+#define timeout (G.timeout )
+#define fp0 (G.fp0 )
+#define xargs (G.xargs )
+#define fargs (G.fargs )
+#define INIT_G() do { \
+ SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
+ xargs[0] = "openssl"; \
+ xargs[1] = "s_client"; \
+ xargs[2] = "-quiet"; \
+ xargs[3] = "-connect"; \
+ /*xargs[4] = "localhost";*/ \
+ xargs[5] = "-tls1"; \
+ xargs[6] = "-starttls"; \
+ xargs[7] = "smtp"; \
+ fargs[0] = CONFIG_FEATURE_SENDMAIL_CHARSET; \
+} while (0)
+
+#define opt_connect (xargs[4])
+#define opt_after_connect (xargs[5])
+#define opt_charset (fargs[0])
+#define opt_subject (fargs[1])
static void uuencode(char *fname, const char *text)
{
@@ -18,14 +49,12 @@ static void uuencode(char *fname, const char *text)
};
#define src_buf text
- int fd;
-#define len fd
+ FILE *fp = fp;
+ ssize_t len = len;
char dst_buf[DST_BUF_SIZE + 1];
if (fname) {
- fd = INITIAL_STDIN_FILENO;
- if (NOT_LONE_DASH(fname))
- fd = xopen(fname, O_RDONLY);
+ fp = (NOT_LONE_DASH(fname)) ? xfopen_for_read(fname) : fp0;
src_buf = bb_common_bufsiz1;
// N.B. strlen(NULL) segfaults!
} else if (text) {
@@ -35,11 +64,10 @@ static void uuencode(char *fname, const char *text)
} else
return;
- fflush(stdout); // sync stdio and unistd output
while (1) {
size_t size;
if (fname) {
- size = full_read(fd, (char *)src_buf, SRC_BUF_SIZE);
+ size = fread((char *)src_buf, 1, SRC_BUF_SIZE, fp);
if ((ssize_t)size < 0)
bb_perror_msg_and_die(bb_msg_read_error);
} else {
@@ -52,50 +80,20 @@ static void uuencode(char *fname, const char *text)
// encode the buffer we just read in
bb_uuencode(dst_buf, src_buf, size, bb_uuenc_tbl_base64);
if (fname) {
- xwrite(STDOUT_FILENO, "\r\n", 2);
+ printf("\r\n");
} else {
src_buf += size;
len -= size;
}
- xwrite(STDOUT_FILENO, dst_buf, 4 * ((size + 2) / 3));
+ fwrite(dst_buf, 1, 4 * ((size + 2) / 3), stdout);
}
if (fname)
- close(fd);
+ fclose(fp);
#undef src_buf
-#undef len
}
-struct globals {
- pid_t helper_pid;
- unsigned timeout;
- // arguments for SSL connection helper
- const char *xargs[9];
- // arguments for postprocess helper
- const char *fargs[3];
-};
-#define G (*ptr_to_globals)
-#define helper_pid (G.helper_pid)
-#define timeout (G.timeout )
-#define xargs (G.xargs )
-#define fargs (G.fargs )
-#define INIT_G() do { \
- SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
- xargs[0] = "openssl"; \
- xargs[1] = "s_client"; \
- xargs[2] = "-quiet"; \
- xargs[3] = "-connect"; \
- /*xargs[4] = "localhost";*/ \
- xargs[5] = "-tls1"; \
- xargs[6] = "-starttls"; \
- xargs[7] = "smtp"; \
- fargs[0] = "utf-8"; \
-} while (0)
-
-#define opt_connect (xargs[4])
-#define opt_after_connect (xargs[5])
-#define opt_charset (fargs[0])
-#define opt_subject (fargs[1])
+#if ENABLE_FEATURE_SENDMAIL_SSL
static void kill_helper(void)
{
// TODO!!!: is there more elegant way to terminate child on program failure?
@@ -107,7 +105,6 @@ static void kill_helper(void)
static void signal_handler(int signo)
{
#define err signo
-
if (SIGALRM == signo) {
kill_helper();
bb_error_msg_and_die("timed out");
@@ -151,6 +148,10 @@ static void launch_helper(const char **argv)
signal_handler(SIGCHLD);
// child seems OK -> parent goes on
}
+#else
+#define kill_helper() ((void)0)
+#define launch_helper(x) bb_error_msg_and_die("no SSL support")
+#endif
static const char *command(const char *fmt, const char *param)
{
@@ -177,15 +178,14 @@ static int smtp_checkp(const char *fmt, const char *param, int code)
while ((answer = xmalloc_fgetline(stdin)) != NULL)
if (strlen(answer) <= 3 || '-' != answer[3])
break;
+//bb_error_msg("FMT[%s]ANS[%s]", fmt, answer);
if (answer) {
int n = atoi(answer);
+//bb_error_msg("FMT[%s]COD[%d][%d]", fmt, n, code);
alarm(0);
- if (ENABLE_FEATURE_CLEAN_UP) {
- free(answer);
- }
- if (-1 == code || n == code) {
+ free(answer);
+ if (-1 == code || n == code)
return n;
- }
}
kill_helper();
bb_error_msg_and_die("%s failed", msg);
@@ -283,30 +283,34 @@ static void rcptto(const char *s)
int sendgetmail_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int sendgetmail_main(int argc UNUSED_PARAM, char **argv)
{
+#if ENABLE_FEATURE_SENDMAIL_MAILX
llist_t *opt_attachments = NULL;
- char *opt_from;
+#endif
+ char *opt_from, *opt_fullname;
const char *opt_user;
const char *opt_pass;
+
enum {
OPT_w = 1 << 0, // network timeout
+
OPT_H = 1 << 1, // [user:password@]server[:port]
OPT_S = 1 << 2, // connect using openssl s_client helper
- OPTS_t = 1 << 3, // sendmail: read addresses from body
+ OPTS_t = 1 << 3, // sendmail: read message for recipients
OPTF_t = 1 << 3, // fetchmail: use "TOP" not "RETR"
- OPTS_s = 1 << 4, // sendmail: subject
+ OPTS_N = 1 << 4, // sendmail: request notification
OPTF_z = 1 << 4, // fetchmail: delete from server
- OPTS_c = 1 << 5, // sendmail: assumed charset
- OPTS_a = 1 << 6, // sendmail: attachment(s)
- OPTS_i = 1 << 7, // sendmail: ignore lone dots in message body (implied)
+ OPTS_f = 1 << 5, // sendmail: sender address
+ OPTS_F = 1 << 6, // sendmail: sender name, overrides $NAME
- OPTS_N = 1 << 8, // sendmail: request notification
- OPTS_f = 1 << 9, // sendmail: sender address
+ OPTS_s = 1 << 7, // sendmail: subject
+ OPTS_c = 1 << 8, // sendmail: assumed charset
+ OPTS_a = 1 << 9, // sendmail: attachment(s)
};
const char *options;
- int opts;
+ unsigned opts;
// init global variables
INIT_G();
@@ -317,11 +321,11 @@ int sendgetmail_main(int argc UNUSED_PARAM, char **argv)
if (!ENABLE_FETCHMAIL || 's' == applet_name[0]) {
// SENDMAIL
// save initial stdin since body is piped!
- xdup2(STDIN_FILENO, INITIAL_STDIN_FILENO);
+ xdup2(STDIN_FILENO, 3);
+ fp0 = fdopen(3, "r");
opt_complementary = "w+:a::";
- options = "w:H:St" "s:c:a:iN:f:";
- // body is pseudo attachment read from stdin
- llist_add_to_end(&opt_attachments, (char *)"-");
+ options = "w:H:St" "N:f:F:" USE_FEATURE_SENDMAIL_MAILX("s:c:a:")
+ "X:V:vq:R:O:o:nmL:Iih:GC:B:b:A:"; // postfix compat only, ignored
} else {
// FETCHMAIL
opt_after_connect = NULL;
@@ -330,15 +334,19 @@ int sendgetmail_main(int argc UNUSED_PARAM, char **argv)
}
opts = getopt32(argv, options,
&timeout /* -w */, &opt_connect /* -H */,
- &opt_subject, &opt_charset, &opt_attachments, NULL, &opt_from
+ NULL, &opt_from, &opt_fullname,
+#if ENABLE_FEATURE_SENDMAIL_MAILX
+ &opt_subject, &opt_charset, &opt_attachments,
+#endif
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
);
//argc -= optind;
argv += optind;
// connect to server
- // host[:port] not specified ? -> use $HOSTNAME. no $HOSTNAME ? -> use localhost
+ // host[:port] not specified ? -> use $SMTPHOST. no $SMTPHOST ? -> use localhost
if (!(opts & OPT_H)) {
- opt_connect = getenv("HOSTNAME");
+ opt_connect = getenv("SMTPHOST");
if (!opt_connect)
opt_connect = "127.0.0.1";
}
@@ -376,18 +384,13 @@ int sendgetmail_main(int argc UNUSED_PARAM, char **argv)
{
int code;
char *boundary;
- const char *fmt;
- const char *p;
- char *q;
llist_t *l;
llist_t *headers = NULL;
+ char *domain = sane(safe_getdomainname());
// got no sender address? -> use username as a resort
if (!(opts & OPTS_f)) {
- char *domain = safe_getdomainname();
opt_from = xasprintf("%s@%s", opt_user, domain);
- if (ENABLE_FEATURE_CLEAN_UP)
- free(domain);
}
// introduce to server
@@ -399,9 +402,11 @@ int sendgetmail_main(int argc UNUSED_PARAM, char **argv)
}
// we should start with modern EHLO
- if (250 != smtp_checkp("EHLO %s", sane(opt_from), -1)) {
- smtp_checkp("HELO %s", opt_from, 250);
+ if (250 != smtp_checkp("EHLO %s", domain, -1)) {
+ smtp_checkp("HELO %s", domain, 250);
}
+ if (ENABLE_FEATURE_CLEAN_UP)
+ free(domain);
// set sender
// NOTE: if password has not been specified
@@ -431,37 +436,36 @@ int sendgetmail_main(int argc UNUSED_PARAM, char **argv)
argv++;
}
- // if -t specified or no recipients specified -> enter all-included mode
- // i.e. scan stdin for To:, Cc:, Bcc:, and Subject: lines ...
+ // if -t specified or no recipients specified -> read recipients from message
+ // i.e. scan stdin for To:, Cc:, Bcc: lines ...
// ... and then use the rest of stdin as message body
- // N.B. subject read from body has priority
- // over that specified on command line.
- // recipients are merged
+ // N.B. subject read from body can be further overrided with one specified on command line.
+ // recipients are merged. Bcc: lines are deleted
// N.B. other headers are collected and will be dumped verbatim
if (opts & OPTS_t || !headers) {
// fetch recipients and (optionally) subject
char *s;
- while ((s = xmalloc_reads(INITIAL_STDIN_FILENO, NULL, NULL)) != NULL) {
+ while ((s = xmalloc_fgetline(fp0)) != NULL) {
if (0 == strncasecmp("To: ", s, 4) || 0 == strncasecmp("Cc: ", s, 4)) {
rcptto(sane(s+4));
llist_add_to_end(&headers, s);
} else if (0 == strncasecmp("Bcc: ", s, 5)) {
rcptto(sane(s+5));
- if (ENABLE_FEATURE_CLEAN_UP)
- free(s);
+ free(s);
// N.B. Bcc vanishes from headers!
-/* } else if (0 == strncmp("From: ", s, 6)) {
- opt_from = s+6;
- opts |= OPTS_f;
-*/ } else if (0 == strncmp("Subject: ", s, 9)) {
- opt_subject = s+9;
- opts |= OPTS_s;
+ } else if (0 == strncmp("Subject: ", s, 9)) {
+ // we read subject -> use it verbatim unless it is specified
+ // on command line
+ if (!(opts & OPTS_s))
+ llist_add_to_end(&headers, s);
+ else
+ free(s);
} else if (s[0]) {
// misc header
llist_add_to_end(&headers, s);
} else {
free(s);
- break; // empty line
+ break; // stop on the first empty line
}
}
}
@@ -476,18 +480,27 @@ int sendgetmail_main(int argc UNUSED_PARAM, char **argv)
free(l->data);
}
- // put address header
- printf("From: %s\r\n", opt_from);
-
- // put encoded subject
+ // put (possibly encoded) subject
if (opts & OPTS_c)
sane((char *)opt_charset);
if (opts & OPTS_s) {
- printf("Subject: =?%s?B?", opt_charset);
- uuencode(NULL, opt_subject);
- printf("?=\r\n");
+ printf("Subject: ");
+ if (opts & OPTS_c) {
+ printf("=?%s?B?", opt_charset);
+ uuencode(NULL, opt_subject);
+ printf("?=");
+ } else {
+ printf("%s", opt_subject);
+ }
+ printf("\r\n");
}
+ // put sender name, $NAME is the default
+ if (!(opts & OPTS_F))
+ opt_fullname = getenv("NAME");
+ if (opt_fullname)
+ printf("From: \"%s\" <%s>\r\n", opt_fullname, opt_from);
+
// put notification
if (opts & OPTS_N)
printf("Disposition-Notification-To: %s\r\n", opt_from);
@@ -496,58 +509,92 @@ int sendgetmail_main(int argc UNUSED_PARAM, char **argv)
srand(monotonic_us());
boundary = xasprintf("%d-%d-%d", rand(), rand(), rand());
- // put common headers and body start
- printf(
- "Message-ID: <%s>\r\n"
- "Mime-Version: 1.0\r\n"
- "%smultipart/mixed; boundary=\"%s\"\r\n"
- , boundary
- , "Content-Type: "
- , boundary
- );
-
- // put body + attachment(s)
- // N.B. all these weird things just to be tiny
- // by reusing string patterns!
- fmt =
- "\r\n--%s\r\n"
- "%stext/plain; charset=%s\r\n"
- "%s%s\r\n"
- "%s"
- ;
- p = opt_charset;
- q = (char *)"";
- l = opt_attachments;
- while (l) {
+ // put common headers
+ // TODO: do we really need this?
+// printf("Message-ID: <%s>\r\n", boundary);
+
+#if ENABLE_FEATURE_SENDMAIL_MAILX
+ // have attachments? -> compose multipart MIME
+ if (opt_attachments) {
+ const char *fmt;
+ const char *p;
+ char *q;
+
printf(
- fmt
- , boundary
+ "Mime-Version: 1.0\r\n"
+ "%smultipart/mixed; boundary=\"%s\"\r\n"
, "Content-Type: "
- , p
- , "Content-Disposition: inline"
- , q
- , "Content-Transfer-Encoding: base64\r\n"
+ , boundary
);
- p = "";
+
+ // body is pseudo attachment read from stdin in first turn
+ llist_add_to(&opt_attachments, (char *)"-");
+
+ // put body + attachment(s)
+ // N.B. all these weird things just to be tiny
+ // by reusing string patterns!
fmt =
"\r\n--%s\r\n"
- "%sapplication/octet-stream%s\r\n"
- "%s; filename=\"%s\"\r\n"
+ "%stext/plain; charset=%s\r\n"
+ "%s%s\r\n"
"%s"
;
- uuencode(l->data, NULL);
- l = l->link;
- if (l)
- q = bb_get_last_path_component_strip(l->data);
- }
+ p = opt_charset;
+ q = (char *)"";
+ l = opt_attachments;
+ while (l) {
+ 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(l->data, NULL);
+ l = l->link;
+ if (l)
+ q = bb_get_last_path_component_strip(l->data);
+ }
+
+ // put message terminator
+ printf("\r\n--%s--\r\n" "\r\n", boundary);
- // put message terminator
- printf("\r\n--%s--\r\n" "\r\n", boundary);
+ // no attachments? -> just dump message
+ } else
+#endif
+ {
+ char *s;
+ // terminate headers
+ printf("\r\n");
+ // put plain text respecting leading dots
+ while ((s = xmalloc_fgetline(fp0)) != NULL) {
+ // escape leading dots
+ // N.B. this feature is implied even if no -i switch given
+ // N.B. we need to escape the leading dot regardless of
+ // whether it is single or not character on the line
+ if (/*(opts & OPTS_i) && */ '.' == s[0] /*&& '\0' == s[1] */)
+ printf(".");
+ // dump read line
+ printf("%s\r\n", s);
+ }
+ }
// leave "put message" mode
smtp_check(".", 250);
// ... and say goodbye
smtp_check("QUIT", 221);
+ // cleanup
+ if (ENABLE_FEATURE_CLEAN_UP)
+ fclose(fp0);
}
#if ENABLE_FETCHMAIL
/***************************************************
@@ -671,5 +718,5 @@ int sendgetmail_main(int argc UNUSED_PARAM, char **argv)
}
#endif // ENABLE_FETCHMAIL
- return 0;
+ return EXIT_SUCCESS;
}
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