int hostname_setup(void) {
int r;
char *b = NULL;
const char *hn = NULL;
bool enoent = false;
r = read_hostname(&b);
if (r < 0) {
hn = NULL;
if (r == -ENOENT)
enoent = true;
else
log_warning("Failed to read configured hostname: %s", strerror(-r));
} else
hn = b;
if (isempty(hn)) {
/* Don't override the hostname if it is already set
* and not explicitly configured */
if (hostname_is_set())
goto finish;
if (enoent)
log_info("No hostname configured.");
hn = "localhost";
}
if (sethostname(hn, strlen(hn)) < 0) {
log_warning("Failed to set hostname to <%s>: %m", hn);
r = -errno;
} else
log_info("Set hostname to <%s>.", hn);
finish:
free(b);
return r;
}
int hostname_setup(void) {
int r;
_cleanup_free_ char *b = NULL;
const char *hn;
bool enoent = false;
r = read_hostname_config("/etc/hostname", &b);
if (r < 0) {
if (r == -ENOENT)
enoent = true;
else
log_warning_errno(r, "Failed to read configured hostname: %m");
hn = NULL;
} else
hn = b;
if (isempty(hn)) {
/* Don't override the hostname if it is already set
* and not explicitly configured */
if (hostname_is_set())
return 0;
if (enoent)
log_info("No hostname configured.");
hn = "localhost";
}
r = sethostname_idempotent(hn);
if (r < 0)
return log_warning_errno(r, "Failed to set hostname to <%s>: %m", hn);
log_info("Set hostname to <%s>.", hn);
return 0;
}
