service: optimize relaying stdio output of daemons a bit.

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

diff --git a/service/instance.c b/service/instance.c
index 33678851e6321160c2a24609ee8a86dac599035d..4ace40becc86a9ed61a8f69c52dd4774342d7922 100644 (file)
--- a/service/instance.c
+++ b/service/instance.c
@@ -366,6 +366,10 @@ instance_stdio(struct ustream *s, int prio, struct service_instance *in)
        char *newline, *str, *arg0, ident[32];
        int len;
 
+       arg0 = basename(blobmsg_data(blobmsg_data(in->command)));
+       snprintf(ident, sizeof(ident), "%s[%d]", arg0, in->proc.pid);
+       ulog_open(ULOG_SYSLOG, LOG_DAEMON, ident);
+
        do {
                str = ustream_get_read_buf(s, NULL);
                if (!str)
@@ -376,17 +380,13 @@ instance_stdio(struct ustream *s, int prio, struct service_instance *in)
                        break;
 
                *newline = 0;
-               len = newline + 1 - str;
-
-               arg0 = basename(blobmsg_data(blobmsg_data(in->command)));
-               snprintf(ident, sizeof(ident), "%s[%d]", arg0, in->proc.pid);
-
-               ulog_open(ULOG_SYSLOG, LOG_DAEMON, ident);
                ulog(prio, "%s\n", str);
-               ulog_open(ULOG_SYSLOG, LOG_DAEMON, "procd");
 
+               len = newline + 1 - str;
                ustream_consume(s, len);
        } while (1);
+
+       ulog_open(ULOG_SYSLOG, LOG_DAEMON, "procd");
 }
 
 static void