git: eff7d958dda8 - stable/14 - genl: allow to monitor all know groups

The branch stable/14 has been updated by bapt:

URL: https://cgit.FreeBSD.org/src/commit/?id=eff7d958dda8542dc5be4ac6109d0da2055c0d02

commit eff7d958dda8542dc5be4ac6109d0da2055c0d02
Author:     Baptiste Daroussin <bapt@FreeBSD.org>
AuthorDate: 2024-10-07 09:45:21 +0000
Commit:     Baptiste Daroussin <bapt@FreeBSD.org>
CommitDate: 2024-10-23 07:24:09 +0000

    genl: allow to monitor all know groups
    
    Add a special keyword "all" for the group name, which allows genl
    to monitor all groups in an existing family
    
    (cherry picked from commit 65e7a648693cc151990688f48c190df1c1fc858b)
---
 usr.bin/genl/genl.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/usr.bin/genl/genl.c b/usr.bin/genl/genl.c
index e3acb872a39e..eaf20d20e890 100644
--- a/usr.bin/genl/genl.c
+++ b/usr.bin/genl/genl.c
@@ -197,6 +197,7 @@ monitor_mcast(int argc __unused, char **argv)
 	struct _getfamily_attrs attrs;
 	struct pollfd pfd;
 	bool found = false;
+	bool all = false;
 	void (*parser)(struct snl_state *ss, struct nlmsghdr *hdr);
 
 	parser = parser_fallback;
@@ -210,8 +211,10 @@ monitor_mcast(int argc __unused, char **argv)
 	}
 	if (!snl_get_genl_family_info(&ss, argv[0], &attrs))
 		errx(EXIT_FAILURE, "Unknown family '%s'", argv[0]);
+	if (strcmp(argv[1], "all") == 0)
+		all = true;
 	for (uint32_t i = 0; i < attrs.mcast_groups.num_groups; i++) {
-		if (strcmp(attrs.mcast_groups.groups[i]->mcast_grp_name,
+		if (all || strcmp(attrs.mcast_groups.groups[i]->mcast_grp_name,
 		    argv[1]) == 0) {
 			found = true;
 			if (setsockopt(ss.fd, SOL_NETLINK,
@@ -221,7 +224,8 @@ monitor_mcast(int argc __unused, char **argv)
 			    == -1)
 				err(EXIT_FAILURE, "Cannot subscribe to command "
 				    "notify");
-			break;
+			if (!all)
+				break;
 		}
 	}
 	if (!found)