diff --git a/man/standard-specifiers.xml b/man/standard-specifiers.xml
index 0c258241df..3efbb6db00 100644
--- a/man/standard-specifiers.xml
+++ b/man/standard-specifiers.xml
@@ -24,6 +24,11 @@
Host name
The hostname of the running system.
+
+ %l
+ Short host name
+ The hostname of the running system, truncated at the first dot to remove any domain component.
+
%m
Machine ID
diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml
index dd6d6af21d..b451c53020 100644
--- a/man/systemd.unit.xml
+++ b/man/systemd.unit.xml
@@ -1747,6 +1747,11 @@ Note that this setting is not influenced by the Us
Host name
The hostname of the running system at the point in time the unit configuration is loaded.
+
+ %l
+ Short host name
+ The hostname of the running system at the point in time the unit configuration is loaded, truncated at the first dot to remove any domain component.
+
%i
Instance name
diff --git a/man/sysusers.d.xml b/man/sysusers.d.xml
index f7db34ae90..38a95d6e1f 100644
--- a/man/sysusers.d.xml
+++ b/man/sysusers.d.xml
@@ -257,6 +257,7 @@ r - 500-900
+
diff --git a/man/tmpfiles.d.xml b/man/tmpfiles.d.xml
index 2e9ba5fe90..90234c3d43 100644
--- a/man/tmpfiles.d.xml
+++ b/man/tmpfiles.d.xml
@@ -646,6 +646,7 @@ w- /proc/sys/vm/swappiness - - - - 10
This is the home directory of the user running the command. In case of the system instance this resolves to /root.
+
%L
System or user log directory
diff --git a/src/basic/hostname-util.c b/src/basic/hostname-util.c
index 5a2d60f21d..90a3dfc864 100644
--- a/src/basic/hostname-util.c
+++ b/src/basic/hostname-util.c
@@ -31,6 +31,7 @@ bool hostname_is_set(void) {
char* gethostname_malloc(void) {
struct utsname u;
+ const char *s;
/* This call tries to return something useful, either the actual hostname
* or it makes something up. The only reason it might fail is OOM.
@@ -38,10 +39,28 @@ char* gethostname_malloc(void) {
assert_se(uname(&u) >= 0);
- if (isempty(u.nodename) || streq(u.nodename, "(none)"))
- return strdup(FALLBACK_HOSTNAME);
+ s = u.nodename;
+ if (isempty(s) || streq(s, "(none)"))
+ s = FALLBACK_HOSTNAME;
- return strdup(u.nodename);
+ return strdup(s);
+}
+
+char* gethostname_short_malloc(void) {
+ struct utsname u;
+ const char *s;
+
+ /* Like above, but kills the FQDN part if present. */
+
+ assert_se(uname(&u) >= 0);
+
+ s = u.nodename;
+ if (isempty(s) || streq(s, "(none)") || s[0] == '.') {
+ s = FALLBACK_HOSTNAME;
+ assert(s[0] != '.');
+ }
+
+ return strndup(s, strcspn(s, "."));
}
int gethostname_strict(char **ret) {
diff --git a/src/basic/hostname-util.h b/src/basic/hostname-util.h
index 7ba386a0fd..cafd6f020b 100644
--- a/src/basic/hostname-util.h
+++ b/src/basic/hostname-util.h
@@ -9,6 +9,7 @@
bool hostname_is_set(void);
char* gethostname_malloc(void);
+char* gethostname_short_malloc(void);
int gethostname_strict(char **ret);
bool valid_ldh_char(char c) _const_;
diff --git a/src/core/unit-printf.c b/src/core/unit-printf.c
index 049a2f5596..4fee5dc6dc 100644
--- a/src/core/unit-printf.c
+++ b/src/core/unit-printf.c
@@ -291,6 +291,7 @@ int unit_full_printf(const Unit *u, const char *format, char **ret) {
{ 'm', specifier_machine_id, NULL },
{ 'H', specifier_host_name, NULL },
+ { 'l', specifier_short_host_name, NULL },
{ 'b', specifier_boot_id, NULL },
{ 'v', specifier_kernel_release, NULL },
{}
diff --git a/src/shared/specifier.c b/src/shared/specifier.c
index c784222be6..112cf6f8fb 100644
--- a/src/shared/specifier.c
+++ b/src/shared/specifier.c
@@ -160,6 +160,17 @@ int specifier_host_name(char specifier, const void *data, const void *userdata,
return 0;
}
+int specifier_short_host_name(char specifier, const void *data, const void *userdata, char **ret) {
+ char *n;
+
+ n = gethostname_short_malloc();
+ if (!n)
+ return -ENOMEM;
+
+ *ret = n;
+ return 0;
+}
+
int specifier_kernel_release(char specifier, const void *data, const void *userdata, char **ret) {
struct utsname uts;
char *n;
diff --git a/src/shared/specifier.h b/src/shared/specifier.h
index 33c17eae67..50c6cbd6ab 100644
--- a/src/shared/specifier.h
+++ b/src/shared/specifier.h
@@ -18,6 +18,7 @@ int specifier_string(char specifier, const void *data, const void *userdata, cha
int specifier_machine_id(char specifier, const void *data, const void *userdata, char **ret);
int specifier_boot_id(char specifier, const void *data, const void *userdata, char **ret);
int specifier_host_name(char specifier, const void *data, const void *userdata, char **ret);
+int specifier_short_host_name(char specifier, const void *data, const void *userdata, char **ret);
int specifier_kernel_release(char specifier, const void *data, const void *userdata, char **ret);
int specifier_architecture(char specifier, const void *data, const void *userdata, char **ret);
int specifier_os_id(char specifier, const void *data, const void *userdata, char **ret);
diff --git a/src/sysusers/sysusers.c b/src/sysusers/sysusers.c
index 73a710bee7..a13c35b648 100644
--- a/src/sysusers/sysusers.c
+++ b/src/sysusers/sysusers.c
@@ -1389,17 +1389,18 @@ static bool item_equal(Item *a, Item *b) {
static int parse_line(const char *fname, unsigned line, const char *buffer) {
static const Specifier specifier_table[] = {
- { 'm', specifier_machine_id, NULL },
- { 'b', specifier_boot_id, NULL },
- { 'H', specifier_host_name, NULL },
- { 'v', specifier_kernel_release, NULL },
- { 'a', specifier_architecture, NULL },
- { 'o', specifier_os_id, NULL },
- { 'w', specifier_os_version_id, NULL },
- { 'B', specifier_os_build_id, NULL },
- { 'W', specifier_os_variant_id, NULL },
- { 'T', specifier_tmp_dir, NULL },
- { 'V', specifier_var_tmp_dir, NULL },
+ { 'm', specifier_machine_id, NULL },
+ { 'b', specifier_boot_id, NULL },
+ { 'H', specifier_host_name, NULL },
+ { 'l', specifier_short_host_name, NULL },
+ { 'v', specifier_kernel_release, NULL },
+ { 'a', specifier_architecture, NULL },
+ { 'o', specifier_os_id, NULL },
+ { 'w', specifier_os_version_id, NULL },
+ { 'B', specifier_os_build_id, NULL },
+ { 'W', specifier_os_variant_id, NULL },
+ { 'T', specifier_tmp_dir, NULL },
+ { 'V', specifier_var_tmp_dir, NULL },
{}
};
diff --git a/src/test/test-hostname-util.c b/src/test/test-hostname-util.c
index fe1b23e1bb..5ab82bba61 100644
--- a/src/test/test-hostname-util.c
+++ b/src/test/test-hostname-util.c
@@ -140,6 +140,16 @@ static void test_read_etc_hostname(void) {
unlink(path);
}
+static void test_hostname_malloc(void) {
+ _cleanup_free_ char *h = NULL, *l = NULL;
+
+ assert_se(h = gethostname_malloc());
+ log_info("hostname_malloc: \"%s\"", h);
+
+ assert_se(l = gethostname_short_malloc());
+ log_info("hostname_short_malloc: \"%s\"", l);
+}
+
static void test_fallback_hostname(void) {
if (!hostname_is_valid(FALLBACK_HOSTNAME, false)) {
log_error("Configured fallback hostname \"%s\" is not valid.", FALLBACK_HOSTNAME);
@@ -154,6 +164,7 @@ int main(int argc, char *argv[]) {
test_hostname_is_valid();
test_hostname_cleanup();
test_read_etc_hostname();
+ test_hostname_malloc();
test_fallback_hostname();
diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c
index 7137e9fbd7..2702b36bdd 100644
--- a/src/tmpfiles/tmpfiles.c
+++ b/src/tmpfiles/tmpfiles.c
@@ -184,6 +184,7 @@ static const Specifier specifier_table[] = {
{ 'm', specifier_machine_id_safe, NULL },
{ 'b', specifier_boot_id, NULL },
{ 'H', specifier_host_name, NULL },
+ { 'l', specifier_short_host_name, NULL },
{ 'v', specifier_kernel_release, NULL },
{ 'a', specifier_architecture, NULL },
{ 'o', specifier_os_id, NULL },