This is useful when the uml-utilities user-space package has not been
installed by the administrator and an unprivileged user wants to be able to
telnet into a UML instance. The user can install the port-helper binary to
a writable path and set UML_PORT_HELPER. Fallback to using hardcoded path to
port-helper if environment variable is not set.
Signed-off-by: Glenn Washburn <developm...@efficientek.com>
---
arch/um/drivers/port_user.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/um/drivers/port_user.c b/arch/um/drivers/port_user.c
index 0625aa42041d..3e32351dadad 100644
--- a/arch/um/drivers/port_user.c
+++ b/arch/um/drivers/port_user.c
@@ -167,10 +167,14 @@ static void port_pre_exec(void *arg)
int port_connection(int fd, int *socket, int *pid_out)
{
int new, err;
+ char *env;
char *argv[] = { "in.telnetd", "-L",
OS_LIB_PATH "/uml/port-helper", NULL };
struct port_pre_exec_data data;
+ if ((env = getenv("UML_PORT_HELPER")))
+ argv[2] = env;
+
new = accept(fd, NULL, 0);
if (new < 0)
return -errno;
--
2.30.2
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