Author: kevans
Date: Thu Dec 26 22:49:19 2019
New Revision: 356103
URL: https://svnweb.freebsd.org/changeset/base/356103
Log:
cron(8): use proper variable to determine mailer process status
While the mailer is normally opened/set if the mailto is set, this is not
the case if the grandchild actually didn't produce any output. This change
corrects the situation to only attempt to kill/close the mail process if it
was actually opened in the first place.
The reporter initially stumbled on the -n (suppress mail on success) flag
leading to a SIGKILL of the process group, but simultaneously
discovered/reported the behavior with !-n jobs if MAILTO was set and no
output happened.
All of these places that are checking mailto should actually be checking
whether mail is set, so do that for consistency+correctness.
This set of bugs were introduced by r352668.
Submitted by: sig...@gmail.com
Reported by: sig...@gmail.com
Modified:
head/usr.sbin/cron/cron/do_command.c
Modified: head/usr.sbin/cron/cron/do_command.c
==============================================================================
--- head/usr.sbin/cron/cron/do_command.c Thu Dec 26 22:47:24 2019
(r356102)
+++ head/usr.sbin/cron/cron/do_command.c Thu Dec 26 22:49:19 2019
(r356103)
@@ -460,6 +460,8 @@ child_process(e, u)
_exit(ERROR_EXIT);
}
+ mail = NULL;
+
ch = getc(in);
if (ch != EOF) {
Debug(DPROC|DEXT,
@@ -531,7 +533,7 @@ child_process(e, u)
while (EOF != (ch = getc(in))) {
bytes++;
- if (mailto)
+ if (mail)
putc(ch, mail);
}
}
@@ -555,12 +557,12 @@ child_process(e, u)
*/
if (WIFEXITED(waiter) && WEXITSTATUS(waiter) == 0
&& (e->flags & MAIL_WHEN_ERR) == MAIL_WHEN_ERR
- && mailto) {
+ && mail) {
Debug(DPROC, ("[%d] %s executed successfully, mail
suppressed\n",
getpid(), "grandchild command job"))
kill(mailpid, SIGKILL);
(void)fclose(mail);
- mailto = NULL;
+ mail = NULL;
}
@@ -568,7 +570,7 @@ child_process(e, u)
* mailing...
*/
- if (mailto) {
+ if (mail) {
Debug(DPROC, ("[%d] closing pipe to mail\n",
getpid()))
/* Note: the pclose will probably see
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