To not require pmc and phc2sys to run under the same user as ptp4l,
change the ownership of their socket to the server socket, so it can
send a response to their socket.
Signed-off-by: Miroslav Lichvar <mlich...@redhat.com>
---
uds.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/uds.c b/uds.c
index 641a672..81a3f22 100644
--- a/uds.c
+++ b/uds.c
@@ -59,6 +59,7 @@ static int uds_open(struct transport *t, struct interface
*iface, struct fdarray
struct uds *uds = container_of(t, struct uds, t);
const char *name = interface_name(iface);
struct sockaddr_un sa;
+ struct stat st;
int fd, err;
fd = socket(AF_LOCAL, SOCK_DGRAM, 0);
@@ -87,6 +88,14 @@ static int uds_open(struct transport *t, struct interface
*iface, struct fdarray
uds->address.len = sizeof(sa);
chmod(name, UDS_FILEMODE);
+
+ /* Copy the ownership of the server's socket to allow it
+ to send a response if running under a non-root user. */
+ if (strcmp(uds_path, name) && !stat(uds_path, &st) &&
+ (st.st_uid || st.st_gid)) {
+ chown(name, st.st_uid, st.st_gid);
+ }
+
fda->fd[FD_EVENT] = -1;
fda->fd[FD_GENERAL] = fd;
return 0;
--
2.26.3
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