Print errno when socket and ioctl fail

Change-Id: I29f6264dd8db405405494f360c9543a33d342bb9
Signed-off-by: Cheoleun Moon <chleun.moon@samsung.com>

diff --git a/src/utils/util.c b/src/utils/util.c
index f113032..26beb05 100755 (executable)
--- a/src/utils/util.c
+++ b/src/utils/util.c
@@ -370,19 +370,23 @@ gboolean netconfig_interface_up(const char *ifname)
        struct ifreq ifr;
 
        fd = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
-       if (fd < 0)
+       if (fd < 0) {
+               ERR("socket failed %d", errno);
                return FALSE;
+       }
 
        memset(&ifr, 0, sizeof(ifr));
        g_strlcpy((char *)ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
 
        if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
+               ERR("Fail to get IFFLAGS %d", errno);
                close(fd);
                return FALSE;
        }
 
        ifr.ifr_flags |= (IFF_UP | IFF_DYNAMIC);
        if (ioctl(fd, SIOCSIFFLAGS, &ifr) < 0) {
+               ERR("Fail to set IFFLAGS %d", errno);
                close(fd);
                return FALSE;
        }
@@ -399,19 +403,23 @@ gboolean netconfig_interface_down(const char *ifname)
        struct ifreq ifr;
 
        fd = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
-       if (fd < 0)
+       if (fd < 0) {
+               ERR("socket failed %d", errno);
                return FALSE;
+       }
 
        memset(&ifr, 0, sizeof(ifr));
        g_strlcpy((char *)ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
 
        if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
+               ERR("Fail to get IFFLAGS %d", errno);
                close(fd);
                return FALSE;
        }
 
        ifr.ifr_flags = (ifr.ifr_flags & ~IFF_UP) | IFF_DYNAMIC;
        if (ioctl(fd, SIOCSIFFLAGS, &ifr) < 0) {
+               ERR("Fail to set IFFLAGS %d", errno);
                close(fd);
                return FALSE;
        }