sendmail: update from maintainer

3 files changed, 89 insertions, 58 deletions

diff --git a/include/applets.h b/include/applets.h
index e7fc3c03c..591d715c8 100644
--- a/include/applets.h
+++ b/include/applets.h
@@ -306,7 +306,7 @@ USE_RX(APPLET(rx, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_SCRIPT(APPLET(script, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_SED(APPLET(sed, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_SELINUXENABLED(APPLET(selinuxenabled, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
-USE_SENDMAIL(APPLET_ODDNAME(sendmail, sendgetmail, _BB_DIR_USR_BIN, _BB_SUID_NEVER, sendmail))
+USE_SENDMAIL(APPLET_ODDNAME(sendmail, sendgetmail, _BB_DIR_USR_SBIN, _BB_SUID_NEVER, sendmail))
 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))
 USE_SETARCH(APPLET(setarch, _BB_DIR_BIN, _BB_SUID_NEVER))
diff --git a/include/usage.h b/include/usage.h
index df8958060..dd66728be 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -1088,11 +1088,12 @@
      "\n        -S SECTORS" \
 
 #define fetchmail_trivial_usage \
-       "[-w timeout] [-U user] -P password [-X] [-t] [-z] server[:port] maildir [prog]"
+       "[-w timeout] [-H server[:port]] [-U user] -P password [-X] [-t] [-z] maildir [prog]"
 #define fetchmail_full_usage "\n\n" \
        "Fetch content of remote mailbox to local Maildir.\n" \
      "\nOptions:" \
      "\n        -w timeout      Set timeout on network operations" \
+     "\n        -H server[:port] Set server" \
      "\n        -U username     Authenticate with specified username/password" \
      "\n        -P password" \
      "\n        -X              Use openssl connection helper for secured servers" \
@@ -3425,19 +3426,23 @@
 #define selinuxenabled_full_usage ""
 
 #define sendmail_trivial_usage \
-       "[-w timeout] [-U user] [-P password] [-X]\n" \
-       "-t to [-t to]... [-n] [-s subject] [-c charset] server[:port] from [body] [attachment ...]"
+       "[-w timeout] [-H server[:port]] [-U user] [-P password] [-X]\n" \
+       "[-c charset] [-n] [-i] [-s subject] [-a attach]... [-t] [-f sender] [rcpt]..."
 #define sendmail_full_usage "\n\n" \
        "Send an email.\n" \
      "\nOptions:" \
      "\n        -w timeout      Set timeout on network operations" \
+     "\n        -H server[:port] Set server" \
      "\n        -U username     Authenticate with specified username/password" \
      "\n        -P password" \
-     "\n        -t address      Recipient(s). May be repeated" \
      "\n        -X              Use openssl connection helper for secured servers" \
+     "\n        -c charset      Assumed charset for body and subject [utf-8]" \
      "\n        -n              Request delivery notification to sender" \
+     "\n        -i              Ignore single dots in mail body. Implied" \
      "\n        -s subject      Subject" \
-     "\n        -c charset      Assumed charset for body and subject [utf-8]" \
+     "\n        -a file         File to attach. May be multiple" \
+     "\n        -t              Read recipients and subject from body" \
+     "\n        -f              Set sender address" \
 
 #define seq_trivial_usage \
        "[first [increment]] last"
diff --git a/networking/sendmail.c b/networking/sendmail.c
index 027656dd8..071d9d62d 100644
--- a/networking/sendmail.c
+++ b/networking/sendmail.c
@@ -61,6 +61,8 @@ static void uuencode(char *fname, const char *text)
         }
         if (fname)
                 close(fd);
+#undef src_buf
+#undef len
 }
 
 struct globals {
@@ -82,7 +84,7 @@ struct globals {
         xargs[1] = "s_client"; \
         xargs[2] = "-quiet"; \
         xargs[3] = "-connect"; \
-        /*xargs[4] = "server[:port]";*/ \
+        /*xargs[4] = "localhost";*/ \
         xargs[5] = "-tls1"; \
         xargs[6] = "-starttls"; \
         xargs[7] = "smtp"; \
@@ -115,6 +117,16 @@ static void signal_handler(int signo)
         if (wait_any_nohang(&err) > 0)
                 if (WIFEXITED(err) && WEXITSTATUS(err))
                         bb_error_msg_and_die("child exited (%d)", WEXITSTATUS(err));
+#undef err
+}
+
+/* libbb candidate */
+static pid_t vfork_or_die(void)
+{
+        pid_t pid = vfork();
+        if (pid < 0)
+                bb_perror_msg_and_die("vfork");
+        return pid;
 }
 
 static void launch_helper(const char **argv)
@@ -122,12 +134,11 @@ 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;
+        helper_pid = vfork_or_die();
+        idx = (!helper_pid) * 2;
         xdup2(pipes[idx], STDIN_FILENO);
         xdup2(pipes[3-idx], STDOUT_FILENO);
         if (ENABLE_FEATURE_CLEAN_UP)
@@ -255,29 +266,31 @@ int sendgetmail_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
         llist_t *opt_recipients = NULL;
-
+        llist_t *opt_attachments = NULL;
+        char *opt_from;
         const char *opt_user;
         const char *opt_pass;
-
         enum {
                 OPT_w = 1 << 0,         // network timeout
-                OPT_U = 1 << 1,         // user
-                OPT_P = 1 << 2,         // password
-                OPT_X = 1 << 3,         // connect using openssl s_client helper
+                OPT_H = 1 << 1,         // server[:port]
+                OPT_U = 1 << 2,         // user
+                OPT_P = 1 << 3,         // password
+                OPT_X = 1 << 4,         // connect using openssl s_client helper
 
-                OPTS_n = 1 << 4,        // sendmail: request notification
-                OPTF_t = 1 << 4,        // fetchmail: use "TOP" not "RETR"
+                OPTS_t = 1 << 5,        // sendmail: read addresses from body
+                OPTF_t = 1 << 5,        // fetchmail: use "TOP" not "RETR"
 
-                OPTS_s = 1 << 5,        // sendmail: subject
-                OPTF_z = 1 << 5,        // fetchmail: delete from server
+                OPTS_s = 1 << 6,        // sendmail: subject
+                OPTF_z = 1 << 6,        // fetchmail: delete from server
 
-                OPTS_c = 1 << 6,        // sendmail: assumed charset
-                OPTS_t = 1 << 7,        // sendmail: recipient(s)
-                OPTS_i = 1 << 8,        // sendmail: ignore lone dots in message body (implied)
-        };
+                OPTS_c = 1 << 7,        // sendmail: assumed charset
+                OPTS_a = 1 << 8,        // sendmail: attachment(s)
+                OPTS_i = 1 << 9,        // sendmail: ignore lone dots in message body (implied)
 
+                OPTS_n = 1 << 10,       // sendmail: request notification
+        };
         const char *options;
-        unsigned opts;
+        int opts;
 
         // init global variables
         INIT_G();
@@ -289,25 +302,30 @@ int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
                 // SENDMAIL
                 // save initial stdin (body or attachements can be piped!)
                 xdup2(STDIN_FILENO, INITIAL_STDIN_FILENO);
-                opt_complementary = "-2:w+:t::";
-                options = "w:U:P:X" "ns:c:t:i";
+                opt_complementary = "w+:a::";
+                options = "w:H:U:P:Xt" "s:c:a:inf:";
+                // body is pseudo attachment read from stdin
+                llist_add_to_end(&opt_attachments, (char *)"-");
         } else {
                 // FETCHMAIL
                 opt_after_connect = NULL;
-                opt_complementary = "-2:w+:P";
-                options = "w:U:P:X" "tz";
+                opt_complementary = "-1:w+:P";
+                options = "w:H:U:P:Xt" "z";
         }
         opts = getopt32(argv, options,
-                &timeout, &opt_user, &opt_pass,
-                &opt_subject, &opt_charset, &opt_recipients
+                &timeout, &opt_connect, &opt_user, &opt_pass,
+                &opt_subject, &opt_charset, &opt_attachments, &opt_from
         );
         //argc -= optind;
         argv += optind;
 
-        // first argument is remote server[:port]
-        opt_connect = *argv++;
-
         // connect to server
+        // host[:port] not specified ? -> use $HOST. no $HOST ? -> use localhost
+        if (!(opts & OPT_H)) {
+                opt_connect = getenv("HOST");
+                if (!opt_connect)
+                        opt_connect = "127.0.0.1";
+        }
         // SSL ordered? ->
         if (opts & OPT_X) {
                 // ... use openssl helper
@@ -323,20 +341,27 @@ int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
         }
 
 #if ENABLE_FETCHMAIL
-        // we are sendmail?
+        // are we sendmail?
         if (opt_after_connect)
 #endif
-        {
 /***************************************************
  * SENDMAIL
  ***************************************************/
-
-                char *opt_from;
+        {
                 int code;
                 char *boundary;
                 const char *fmt;
                 const char *p;
                 char *q;
+                llist_t *l;
+
+                // recipients specified as arguments
+                while (*argv) {
+                        // loose test on email address validity
+                        if (strchr(sane(*argv), '@'))
+                                llist_add_to_end(&opt_recipients, *argv);
+                        argv++;
+                }
 
                 // we didn't use SSL helper? ->
                 if (!(opts & OPT_X)) {
@@ -344,13 +369,13 @@ int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
                         smtp_check(NULL, 220);
                 }
 
-                // get the sender
-                opt_from = sane(*argv++);
-
-                // if no recipients _and_ no body files specified -> enter all-included mode
+                // if -t specified or no recipients specified -> enter all-included mode
                 // i.e. scan stdin for To: and Subject: lines ...
                 // ... and then use the rest of stdin as message body
-                if (!opt_recipients && !*argv) {
+                // N.B. subject read from body has priority
+                // over that specified on command line.
+                // recipients are merged
+                if (opts & OPTS_t || !opt_recipients) {
                         // fetch recipients and (optionally) subject
                         char *s;
                         while ((s = xmalloc_reads(INITIAL_STDIN_FILENO, NULL, NULL)) != NULL) {
@@ -366,13 +391,11 @@ int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
                                                 break; // empty line
                                 }
                         }
-                        // order to read body from stdin
-                        *--argv = (char *)"-";
                 }
 
                 // introduce to server
                 // we should start with modern EHLO
-                if (250 != smtp_checkp("EHLO %s", opt_from, -1)) {
+                if (250 != smtp_checkp("EHLO %s", sane(opt_from), -1)) {
                         smtp_checkp("HELO %s", opt_from, 250);
                 }
 
@@ -404,8 +427,8 @@ int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
                 }
 
                 // set recipients
-                for (llist_t *to = opt_recipients; to; to = to->link) {
-                        smtp_checkp("RCPT TO:<%s>", sane(to->data), 250);
+                for (l = opt_recipients; l; l = l->link) {
+                        smtp_checkp("RCPT TO:<%s>", sane(l->data), 250);
                 }
 
                 // enter "put message" mode
@@ -413,8 +436,8 @@ int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
 
                 // put address headers
                 printf("From: %s\r\n", opt_from);
-                for (llist_t *to = opt_recipients; to; to = to->link) {
-                        printf("To: %s\r\n", to->data);
+                for (l = opt_recipients; l; l = l->link) {
+                        printf("To: %s\r\n", l->data);
                 }
 
                 // put encoded subject
@@ -455,7 +478,8 @@ int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
                 ;
                 p = opt_charset;
                 q = (char *)"";
-                while (*argv) {
+                l = opt_attachments;
+                while (l) {
                         printf(
                                 fmt
                                 , boundary
@@ -472,9 +496,10 @@ int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
                                 "%s; filename=\"%s\"\r\n"
                                 "%s"
                         ;
-                        uuencode(*argv, NULL);
-                        if (*(++argv))
-                                q = bb_get_last_path_component_strip(*argv);
+                        uuencode(l->data, NULL);
+                        l = l->link;
+                        if (l)
+                                q = bb_get_last_path_component_strip(l->data);
                 }
 
                 // put message terminator
@@ -484,12 +509,12 @@ int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
                 smtp_check(".", 250);
                 // ... and say goodbye
                 smtp_check("QUIT", 221);
-
+        }
 #if ENABLE_FETCHMAIL
-        } else {
 /***************************************************
  * FETCHMAIL
  ***************************************************/
+        else {
 
                 char *buf;
                 unsigned nmsg;
@@ -570,7 +595,8 @@ int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
                 for (; nmsg; nmsg--) {
 
                         // generate unique filename
-                        char *filename = xasprintf("tmp/%llu.%u.%s", monotonic_us(), pid, hostname);
+                        char *filename = xasprintf("tmp/%llu.%u.%s",
+                                        monotonic_us(), (unsigned)pid, hostname);
                         char *target;
                         int rc;
 
@@ -604,8 +630,8 @@ int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
 
                 // Bye
                 pop3_check("QUIT", NULL);
-#endif // ENABLE_FETCHMAIL
         }
+#endif // ENABLE_FETCHMAIL
 
         return 0;
 }