popen() and substrings

char *command = "dht";
// The command "dht" returns a string in the form "xx.x xx.x"

FILE *fd = popen(command, "r");
char buffer[10];
fgets(buffer, 10, fd);
pclose(fd);

char temp[5] = "";
char humid[5] = "";

strncpy(temp, buffer, 4);
temp[4] = '\0';
strncpy(humid, buffer+5, 4);
humid[4] = '\0';

char tempInfo[15];
sprintf(tempInfo, "Temp: %s C", temp);

char humidInfo[15];
sprintf(humidInfo, "Hum: %s %%", humid);