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r24879: Activate the winbindd cache-validation message handler.

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Now the winbindd cache can be checked at runtime by
calling "smbcontrol winbindd validate-cache".

For the execution of the validation code, I fork a child
and in the child restore the default SIGCHLD handler in
order for the fork/waitpid mechanism of tdb_validate to work.

Michael
(This used to be commit f379a5c47d5004a5a66b6c12ec119c739b9e146d)
This commit is contained in:
Michael Adam 2007-09-02 00:32:57 +00:00 committed by Gerald (Jerry) Carter
parent 60abd094fa
commit f9a177772d
1 changed files with 38 additions and 4 deletions
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42
source3/nsswitch/winbindd.c
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@ -210,18 +210,52 @@ static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
DATA_BLOB *data)
{
uint8 ret;
pid_t child_pid;
struct sigaction act;
struct sigaction oldact;
DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
"message.\n"));
#if 0
/*
* call the validation code from a child:
* so we don't block the main winbindd and the validation
* code can safely use fork/waitpid...
*/
CatchChild();
child_pid = sys_fork();
if (child_pid == -1) {
DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
strerror(errno)));
return;
}
if (child_pid != 0) {
/* parent */
DEBUG(5, ("winbind_msg_validate_cache: child created with "
"pid %d.\n", child_pid));
return;
}
/* child */
/* install default SIGCHLD handler: validation code uses fork/waitpid */
ZERO_STRUCT(act);
act.sa_handler = SIG_DFL;
#ifdef SA_RESTART
/* We *want* SIGALRM to interrupt a system call. */
act.sa_flags = SA_RESTART;
#endif
sigemptyset(&act.sa_mask);
sigaddset(&act.sa_mask,SIGCHLD);
sigaction(SIGCHLD,&act,&oldact);
ret = (uint8)winbindd_validate_cache_nobackup();
DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
#else
ret = 0;
#endif
messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
(size_t)1);
_exit(0);
}
static struct winbindd_dispatch_table {