static int context_read_data(Context *c) {
int r;
struct utsname u;
assert(c);
context_reset(c);
assert_se(uname(&u) >= 0);
c->data[PROP_KERNEL_NAME] = strdup(u.sysname);
c->data[PROP_KERNEL_RELEASE] = strdup(u.release);
c->data[PROP_KERNEL_VERSION] = strdup(u.version);
if (!c->data[PROP_KERNEL_NAME] || !c->data[PROP_KERNEL_RELEASE] ||
!c->data[PROP_KERNEL_VERSION])
return -ENOMEM;
c->data[PROP_HOSTNAME] = gethostname_malloc();
if (!c->data[PROP_HOSTNAME])
return -ENOMEM;
r = read_hostname_config("/etc/hostname", &c->data[PROP_STATIC_HOSTNAME]);
if (r < 0 && r != -ENOENT)
return r;
r = parse_env_file("/etc/machine-info", NEWLINE,
"PRETTY_HOSTNAME", &c->data[PROP_PRETTY_HOSTNAME],
"ICON_NAME", &c->data[PROP_ICON_NAME],
"CHASSIS", &c->data[PROP_CHASSIS],
"DEPLOYMENT", &c->data[PROP_DEPLOYMENT],
"LOCATION", &c->data[PROP_LOCATION],
NULL);
if (r < 0 && r != -ENOENT)
return r;
r = parse_env_file("/etc/os-release", NEWLINE,
"PRETTY_NAME", &c->data[PROP_OS_PRETTY_NAME],
"CPE_NAME", &c->data[PROP_OS_CPE_NAME],
NULL);
if (r == -ENOENT) {
r = parse_env_file("/usr/lib/os-release", NEWLINE,
"PRETTY_NAME", &c->data[PROP_OS_PRETTY_NAME],
"CPE_NAME", &c->data[PROP_OS_CPE_NAME],
NULL);
}
if (r < 0 && r != -ENOENT)
return r;
return 0;
}
static void test_read_hostname_config(void) {
char path[] = "/tmp/hostname.XXXXXX";
char *hostname;
int fd;
fd = mkostemp_safe(path, O_RDWR|O_CLOEXEC);
assert(fd > 0);
close(fd);
/* simple hostname */
write_string_file(path, "foo", WRITE_STRING_FILE_CREATE);
assert_se(read_hostname_config(path, &hostname) == 0);
assert_se(streq(hostname, "foo"));
hostname = mfree(hostname);
/* with comment */
write_string_file(path, "# comment\nfoo", WRITE_STRING_FILE_CREATE);
assert_se(read_hostname_config(path, &hostname) == 0);
assert_se(hostname);
assert_se(streq(hostname, "foo"));
hostname = mfree(hostname);
/* with comment and extra whitespace */
write_string_file(path, "# comment\n\n foo ", WRITE_STRING_FILE_CREATE);
assert_se(read_hostname_config(path, &hostname) == 0);
assert_se(hostname);
assert_se(streq(hostname, "foo"));
hostname = mfree(hostname);
/* cleans up name */
write_string_file(path, "!foo/bar.com", WRITE_STRING_FILE_CREATE);
assert_se(read_hostname_config(path, &hostname) == 0);
assert_se(hostname);
assert_se(streq(hostname, "foobar.com"));
hostname = mfree(hostname);
/* no value set */
hostname = (char*) 0x1234;
write_string_file(path, "# nothing here\n", WRITE_STRING_FILE_CREATE);
assert_se(read_hostname_config(path, &hostname) == -ENOENT);
assert_se(hostname == (char*) 0x1234); /* does not touch argument on error */
/* nonexisting file */
assert_se(read_hostname_config("/non/existing", &hostname) == -ENOENT);
assert_se(hostname == (char*) 0x1234); /* does not touch argument on error */
unlink(path);
}
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;
}
