From: Ralph Boehme <slow@samba.org>
Date: Thu, 25 Apr 2024 13:17:08 +0000 (+0200)
Subject: s3/lib: add option "serverid watch:debug script"
X-Git-Tag: ldb-2.8.2~14
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b5388c25b886b207e6a24e29c1495654c29d2de6;p=thirdparty%2Fsamba.git

s3/lib: add option "serverid watch:debug script"

This takes just PID and NODE:PID on a cluster.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15624

Pair-Programmed-With: Stefan Metzmacher <metze@samba.org>

Signed-off-by: Ralph Boehme <slow@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
(cherry picked from commit 7add7dbf1aee13b4d9ab70d1a5312c8ff30d9e00)
---

diff --git a/source3/lib/server_id_watch.c b/source3/lib/server_id_watch.c
index c372ec8c431..8ddf9c6b1c8 100644
--- a/source3/lib/server_id_watch.c
+++ b/source3/lib/server_id_watch.c
@@ -100,6 +100,7 @@ static void server_id_watch_waited(struct tevent_req *subreq)
 
 	if (timeval_compare(&state->warn, &now) == -1) {
 		double duration = timeval_elapsed2(&state->start, &now);
+		const char *cmd = NULL;
 		char proc_path[64] = { 0, };
 		char *kstack = NULL;
 		struct server_id_buf buf;
@@ -108,6 +109,57 @@ static void server_id_watch_waited(struct tevent_req *subreq)
 
 		state->warn = tevent_timeval_add(&now, 10, 0);
 
+		cmd = lp_parm_const_string(GLOBAL_SECTION_SNUM,
+					   "serverid watch",
+					   "debug script",
+					   NULL);
+		if (cmd != NULL) {
+			char *cmdstr = NULL;
+			char *output = NULL;
+			int fd;
+
+			/*
+			 * Note in a cluster setup pid will be
+			 * a NOTE:PID like '1:3978365'
+			 *
+			 * Without clustering it is just '3978365'
+			 */
+			cmdstr = talloc_asprintf(state, "%s %s", cmd, pid);
+			if (cmdstr == NULL) {
+				DBG_ERR("Process %s hanging for %f seconds?\n"
+					"talloc_asprintf failed\n",
+					pid, duration);
+				goto next;
+			}
+
+			become_root();
+			ret = smbrun(cmdstr, &fd, NULL);
+			unbecome_root();
+			if (ret != 0) {
+				DBG_ERR("Process %s hanging for %f seconds?\n"
+					"smbrun('%s') failed\n",
+					pid, duration, cmdstr);
+				TALLOC_FREE(cmdstr);
+				goto next;
+			}
+
+			output = fd_load(fd, NULL, 0, state);
+			close(fd);
+			if (output == NULL) {
+				DBG_ERR("Process %s hanging for %f seconds?\n"
+					"fd_load() of smbrun('%s') failed\n",
+					pid, duration, cmdstr);
+				TALLOC_FREE(cmdstr);
+				goto next;
+			}
+			DBG_ERR("Process %s hanging for %f seconds?\n"
+				"%s returned:\n%s",
+				pid, duration, cmdstr, output);
+			TALLOC_FREE(cmdstr);
+			TALLOC_FREE(output);
+			goto next;
+		}
+
 		if (!procid_is_local(&state->pid) || !sys_have_proc_fds()) {
 			DBG_ERR("Process %s hanging for %f seconds?\n",
 				pid, duration);