sendmail: support address lists

Headers To:, Cc: and Bcc: may have a list of comma-separated
addresses. Add support for that. Commas inside double quotes are ignored.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/mailutils/sendmail.c b/mailutils/sendmail.c
index 10a5a85d4b79745c493c569723174063043fba5c..c5df5f5d33d9524cd186fbf0592c48e7cb984a70 100644 (file)
--- a/mailutils/sendmail.c
+++ b/mailutils/sendmail.c
@@ -144,6 +144,33 @@ static void rcptto(const char *s)
                bb_error_msg("Bad recipient: <%s>", s);
 }
 
+// send to a list of comma separated addresses
+static void rcptto_list(const char *_str)
+{
+       char *str = xstrdup(_str);
+       int len = strlen(str);
+       int in_quote = 0;
+       char *s = str;
+       char prev = 0;
+       int pos;
+
+       for (pos = 0; pos < len; pos++) {
+               char ch = str[pos];
+
+               if (ch == '"' && prev != '\\') {
+                       in_quote = !in_quote;
+               } else if (!in_quote && ch == ',') {
+                       str[pos] = '\0';
+                       rcptto(angle_address(s));
+                       s = str + pos + 1;
+               }
+               prev = ch;
+       }
+       if (prev != ',')
+               rcptto(angle_address(s));
+       free(str);
+}
+
 int sendmail_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int sendmail_main(int argc UNUSED_PARAM, char **argv)
 {
@@ -317,14 +344,12 @@ int sendmail_main(int argc UNUSED_PARAM, char **argv)
                // To: or Cc: headers add recipients
                if (opts & OPT_t) {
                        if (0 == strncasecmp("To:", s, 3) || 0 == strncasecmp("Bcc:" + 1, s, 3)) {
-                               char *r = xstrdup(s+3);
-                               rcptto(angle_address(r));
-                               free(r);
+                               rcptto_list(s+3);
                                goto addheader;
                        }
                        // Bcc: header adds blind copy (hidden) recipient
                        if (0 == strncasecmp("Bcc:", s, 4)) {
-                               rcptto(angle_address(s+4));
+                               rcptto_list(s+4);
                                free(s);
                                continue; // N.B. Bcc: vanishes from headers!
                        }