This fixes the following compile problem:
````
/route.c: In function 'rtnl_flush':
/route.c:45:15: error: ignoring return value of 'write' declared with attribute 'warn_unused_result' [-Werror=unused-result]
45 | (void)write(fd, "-1", 2);
| ^~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
ninja: build stopped: subcommand failed.
````
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
static void rtnl_flush(void)
{
+ ssize_t ret;
int fd;
fd = open("/proc/sys/net/ipv4/route/flush", O_WRONLY);
if (fd < 0)
return;
- write(fd, "-1", 2);
+ ret = write(fd, "-1", 2);
+ if (ret != 2)
+ perror("write");
close(fd);
}