check_smtp: Remove a comment regarding MAIL FROM

Earlier versions of check_smtp generated an (invalid) "MAIL FROM"
command without arguments by default.  These days, a "MAIL FROM" command
is only sent if the --from option is specified.

This commit removes a comment which explains the old behaviour, and it
updates a variable name accordingly.

1 files changed, 4 insertions, 15 deletions

diff --git a/plugins/check_smtp.c b/plugins/check_smtp.c
index 58367a3..3758fd9 100644
--- a/plugins/check_smtp.c
+++ b/plugins/check_smtp.c
@@ -87,9 +87,7 @@ int errcode, excode;
 int server_port = SMTP_PORT;
 char *server_address = NULL;
 char *server_expect = NULL;
-int smtp_use_dummycmd = 0;
-char *mail_command = NULL;
-char *from_arg = NULL;
+int send_mail_from=0;
 int ncommands=0;
 int command_size=0;
 int nresponses=0;
@@ -166,7 +164,7 @@ main (int argc, char **argv)
         /* initialize the MAIL command with optional FROM command  */
         xasprintf (&cmd_str, "%sFROM:<%s>%s", mail_command, from_arg, "\r\n");
 
-        if (verbose && smtp_use_dummycmd)
+        if (verbose && send_mail_from)
                 printf ("FROM CMD: %s", cmd_str);
 
         /* initialize alarm signal handling */
@@ -283,16 +281,7 @@ main (int argc, char **argv)
                 }
 #endif
 
-                /* sendmail will syslog a "NOQUEUE" error if session does not attempt
-                 * to do something useful. This can be prevented by giving a command
-                 * even if syntax is illegal (MAIL requires a FROM:<...> argument)
-                 *
-                 * According to rfc821 you can include a null reversepath in the from command
-                 * - but a log message is generated on the smtp server.
-                 *
-                 * Use the -f option to provide a FROM address
-                 */
-                if (smtp_use_dummycmd) {
+                if (send_mail_from) {
                   my_send(cmd_str, strlen(cmd_str));
                   if (recvlines(buffer, MAX_INPUT_BUFFER) >= 1 && verbose)
                     printf("%s", buffer);
@@ -521,7 +510,7 @@ process_arguments (int argc, char **argv)
                 case 'f':                                                                       /* from argument */
                         from_arg = optarg + strspn(optarg, "<");
                         from_arg = strndup(from_arg, strcspn(from_arg, ">"));
-                        smtp_use_dummycmd = 1;
+                        send_mail_from = 1;
                         break;
                 case 'A':
                         authtype = optarg;