[PATCH 1/2][RFC]Ktest: Add email support

[Tim Tianyang Chen <tianyang.chen@oracle.com>]

Users can define optional "MAILER" "USR_EMAIL" variables to get email notifications.
Ktest will send emails when the script:
  * was started
  * was cancelled by Ctrl-C
  * failed with fatal errors and called dodie()
  * completed all testing

Users have to setup the mailer provided in config prior to using this script.
Supported mailers: mailx, mail, sendmail
mailer specific routines are _sendmail_send(), _mailx_send()

Suggested-by: Dhaval Giani <dhaval.giani@oracle.com>
Signed-off-by: Tim Tianyang Chen <tianyang.chen@oracle.com>
---
  ktest.pl | 41 +++++++++++++++++++++++++++++++++++++++++
  1 file changed, 41 insertions(+)

diff --git a/ktest.pl b/ktest.pl
index 0c8b61f..2e38647 100755
--- a/ktest.pl
+++ b/ktest.pl
@@ -22,6 +22,8 @@ my %evals;
  
  #default opts
  my %default = (
+    "USR_EMAIL"			=> "",
+    "MAILER"			=> "mailx",  # default mailer
      "NUM_TESTS"			=> 1,
      "TEST_TYPE"			=> "build",
      "BUILD_TYPE"		=> "randconfig",
@@ -204,6 +206,8 @@ my $install_time;
  my $reboot_time;
  my $test_time;
  
+my $script_start_time = localtime();
+
  # set when a test is something other that just building or install
  # which would require more options.
  my $buildonly = 1;
@@ -1426,6 +1430,9 @@ sub dodie {
  	print " See $opt{LOG_FILE} for more info.\n";
      }
  
+    send_email("KTEST: critical failure for your [$opt{TEST_TYPE}] test",
+                "Your test started at $script_start_time has failed with:\n@_\n");
+
      if ($monitor_cnt) {
  	    # restore terminal settings
  	    system("stty $stty_orig");
@@ -4224,6 +4231,38 @@ sub set_test_option {
      return eval_option($name, $option, $i);
  }
  
+sub _mailx_send {
+    my ($subject, $message) = @_;
+    system("$opt{MAILER} -s \'$subject\' $opt{USR_EMAIL} <<< \'$message\'");
+}
+
+sub _sendmail_send {
+    my ($subject, $message) = @_;
+    system("echo -e \"Subject: $subject\n\n$message\" | sendmail -t $opt{USR_EMAIL}");
+}
+
+sub send_email {
+    if ($opt{USR_EMAIL} ne "" && $opt{MAILER} ne "")
+    {
+        if ($opt{MAILER} eq "mail" || $opt{MAILER} eq "mailx"){ _mailx_send(@_);}
+        elsif ($opt{MAILER} eq "sendmail" ) { _sendmail_send(@_);}
+        else { doprint "\nYour mailer: $opt{MAILER} is not supported.\n" }
+    }
+    else
+    {
+        print "No email sent: email or mailer not specified in config.\n"
+    }
+}
+
+$SIG{INT} = sub {
+    send_email("KTEST: Your [$opt{TEST_TYPE}] test was cancelled",
+                "Your test started at $script_start_time was cancelled: sig int");
+    die "\nCaught Sig Int, test interrupted: $!\n"
+};
+
+send_email("KTEST: Your [$opt{TEST_TYPE}] test was started",
+            "Your test was started on $script_start_time");
+
  # First we need to do is the builds
  for (my $i = 1; $i <= $opt{"NUM_TESTS"}; $i++) {
  
@@ -4429,5 +4468,7 @@ if ($opt{"POWEROFF_ON_SUCCESS"}) {
  
  
  doprint "\n    $successes of $opt{NUM_TESTS} tests were successful\n\n";
+send_email("KTEST: Your [$opt{TEST_TYPE}] test has finished!",
+            "$successes of $opt{NUM_TESTS} tests started at $script_start_time were successful!");
  
  exit 0;
-- 
1.8.3.1