[PATCH v1] tools/hv: reduce resouce usage in hv_kvp_daemon

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hv_kvp_daemon uses popen(3) and system(3) as convinience helper to
launch external helpers. These helpers are invoked via a
temporary shell process. There is no need to keep this temporary
process around while the helper runs. Replace this temporary shell
with the actual helper process via 'exec'.

Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
---
 tools/hv/hv_kvp_daemon.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c
index ae57bf69ad4a..91b50cadfc52 100644
--- a/tools/hv/hv_kvp_daemon.c
+++ b/tools/hv/hv_kvp_daemon.c
@@ -725,7 +725,7 @@ static void kvp_get_ipconfig_info(char *if_name,
 	 * .
 	 */
 
-	sprintf(cmd, KVP_SCRIPTS_PATH "%s",  "hv_get_dns_info");
+	sprintf(cmd, "exec %s", KVP_SCRIPTS_PATH "hv_get_dns_info");
 
 	/*
 	 * Execute the command to gather DNS info.
@@ -742,7 +742,7 @@ static void kvp_get_ipconfig_info(char *if_name,
 	 * Enabled: DHCP enabled.
 	 */
 
-	sprintf(cmd, KVP_SCRIPTS_PATH "%s %s", "hv_get_dhcp_info", if_name);
+	sprintf(cmd, "exec %s %s", KVP_SCRIPTS_PATH "hv_get_dhcp_info", if_name);
 
 	file = popen(cmd, "r");
 	if (file == NULL)
@@ -1606,7 +1606,7 @@ static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
 	 * invoke the external script to do its magic.
 	 */
 
-	str_len = snprintf(cmd, sizeof(cmd), KVP_SCRIPTS_PATH "%s %s %s",
+	str_len = snprintf(cmd, sizeof(cmd), "exec %s %s %s", KVP_SCRIPTS_PATH
 			   "hv_set_ifconfig", if_filename, nm_filename);
 	/*
 	 * This is a little overcautious, but it's necessary to suppress some




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