-/* $Cambridge: exim/src/src/child.c,v 1.1 2004/10/07 10:39:01 ph10 Exp $ */
+/* $Cambridge: exim/src/src/child.c,v 1.4 2005/02/17 11:58:25 ph10 Exp $ */
/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2004 */
+/* Copyright (c) University of Cambridge 1995 - 2005 */
/* See the file NOTICE for conditions of use and distribution. */
any file descriptors "in the way" in the new process, they are closed. A new
umask is supplied for the process, and an optional new uid and gid are also
available. These are used by the queryprogram router to set an unprivileged id.
-The function returns the pid of the new process, or -1 if things go wrong.
+SIGUSR1 is always disabled in the new process, as it is not going to be running
+Exim (the function child_open_exim() is provided for that). This function
+returns the pid of the new process, or -1 if things go wrong.
Arguments:
argv the argv for exec in the new process
close(2);
dup2(1, 2);
- /* Set the required environment. If changing uid, ensure that
- SIGUSR1 is ignored, as the process won't have the privilege to
- write to the process log. */
+ /* Set the required environment. */
+ signal(SIGUSR1, SIG_IGN);
if (newgid != NULL && setgid(*newgid) < 0) goto CHILD_FAILED;
- if (newuid != NULL)
- {
- signal(SIGUSR1, SIG_IGN);
- if (setuid(*newuid) < 0) goto CHILD_FAILED;
- }
+ if (newuid != NULL && setuid(*newuid) < 0) goto CHILD_FAILED;
(void)umask(newumask);
/* Set the working directory if required */
*************************************************/
/* This function is a wrapper for child_open_uid() that doesn't have the uid,
-gid, and working directory changing arguments. It is provided so as to have a
-clean interface for use from local_scan(), but also saves writing NULL
-arguments in other calls.
+gid and working directory changing arguments. The function is provided so as to
+have a clean interface for use from local_scan(), but also saves writing NULL
+arguments several calls that would otherwise use child_open_uid().
Arguments:
argv the argv for exec in the new process