condition: add ConditionPathIsSymbolicLink

6 files changed, 23 insertions, 3 deletions

diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml
index 4437510df7..f4764f9557 100644
--- a/man/systemd.unit.xml
+++ b/man/systemd.unit.xml
@@ -665,6 +665,7 @@
                                 <term><varname>ConditionPathExists=</varname></term>
                                 <term><varname>ConditionPathExistsGlob=</varname></term>
                                 <term><varname>ConditionPathIsDirectory=</varname></term>
+                                <term><varname>ConditionPathIsSymbolicLink=</varname></term>
                                 <term><varname>ConditionPathIsMountPoint=</varname></term>
                                 <term><varname>ConditionDirectoryNotEmpty=</varname></term>
                                 <term><varname>ConditionFileIsExecutable=</varname></term>
@@ -702,7 +703,12 @@
                                 <varname>ConditionPathExists=</varname>
                                 but verifies whether a certain path
                                 exists and is a
-                                directory. <varname>ConditionPathIsMountPoint=</varname>
+                                directory. <varname>ConditionPathIsSymbolicLink=</varname>
+                                is similar to
+                                <varname>ConditionPathExists=</varname>
+                                but verifies whether a certain path
+                                exists and is a
+                                symbolic link. <varname>ConditionPathIsMountPoint=</varname>
                                 is similar to
                                 <varname>ConditionPathExists=</varname>
                                 but verifies whether a certain path
@@ -780,8 +786,9 @@
                                 prefix an argument with the pipe
                                 symbol and an exclamation mark the
                                 pipe symbol must be passed first, the
-                                exclamation second. All path checks
-                                follow symlinks.</para></listitem>
+                                exclamation second. Except for
+                                <varname>ConditionPathIsSymbolicLink=</varname>,
+                                all path checks follow symlinks.</para></listitem>
                         </varlistentry>
 
                         <varlistentry>
diff --git a/src/condition.c b/src/condition.c
index 7f8564966a..f84c81bd81 100644
--- a/src/condition.c
+++ b/src/condition.c
@@ -167,6 +167,14 @@ bool condition_test(Condition *c) {
                 return S_ISDIR(st.st_mode) == !c->negate;
         }
 
+        case CONDITION_PATH_IS_SYMBOLIC_LINK: {
+                struct stat st;
+
+                if (lstat(c->parameter, &st) < 0)
+                        return !c->negate;
+                return S_ISLNK(st.st_mode) == !c->negate;
+        }
+
         case CONDITION_PATH_IS_MOUNT_POINT:
                 return (path_is_mount_point(c->parameter, true) > 0) == !c->negate;
 
@@ -256,6 +264,7 @@ static const char* const condition_type_table[_CONDITION_TYPE_MAX] = {
         [CONDITION_PATH_EXISTS] = "ConditionPathExists",
         [CONDITION_PATH_EXISTS_GLOB] = "ConditionPathExistsGlob",
         [CONDITION_PATH_IS_DIRECTORY] = "ConditionPathIsDirectory",
+        [CONDITION_PATH_IS_SYMBOLIC_LINK] = "ConditionPathIsSymbolicLink",
         [CONDITION_PATH_IS_MOUNT_POINT] = "ConditionPathIsMountPoint",
         [CONDITION_DIRECTORY_NOT_EMPTY] = "ConditionDirectoryNotEmpty",
         [CONDITION_KERNEL_COMMAND_LINE] = "ConditionKernelCommandLine",
diff --git a/src/condition.h b/src/condition.h
index 66b020fc8c..dd65aa6054 100644
--- a/src/condition.h
+++ b/src/condition.h
@@ -30,6 +30,7 @@ typedef enum ConditionType {
         CONDITION_PATH_EXISTS,
         CONDITION_PATH_EXISTS_GLOB,
         CONDITION_PATH_IS_DIRECTORY,
+        CONDITION_PATH_IS_SYMBOLIC_LINK,
         CONDITION_PATH_IS_MOUNT_POINT,
         CONDITION_DIRECTORY_NOT_EMPTY,
         CONDITION_FILE_IS_EXECUTABLE,
diff --git a/src/load-fragment-gperf.gperf.m4 b/src/load-fragment-gperf.gperf.m4
index 370a7a7eb6..7749b88dfb 100644
--- a/src/load-fragment-gperf.gperf.m4
+++ b/src/load-fragment-gperf.gperf.m4
@@ -112,6 +112,7 @@ Unit.JobTimeoutSec,              config_parse_usec,                  0,
 Unit.ConditionPathExists,        config_parse_unit_condition_path,   CONDITION_PATH_EXISTS,         0
 Unit.ConditionPathExistsGlob,    config_parse_unit_condition_path,   CONDITION_PATH_EXISTS_GLOB,    0
 Unit.ConditionPathIsDirectory,   config_parse_unit_condition_path,   CONDITION_PATH_IS_DIRECTORY,   0
+Unit.ConditionPathIsSymbolicLink,config_parse_unit_condition_path,   CONDITION_PATH_IS_SYMBOLIC_LINK,0
 Unit.ConditionPathIsMountPoint,  config_parse_unit_condition_path,   CONDITION_PATH_IS_MOUNT_POINT, 0
 Unit.ConditionDirectoryNotEmpty, config_parse_unit_condition_path,   CONDITION_DIRECTORY_NOT_EMPTY, 0
 Unit.ConditionFileIsExecutable,  config_parse_unit_condition_path,   CONDITION_FILE_IS_EXECUTABLE,  0
diff --git a/units/var-lock.mount b/units/var-lock.mount
index 80e1bab261..07277adac3 100644
--- a/units/var-lock.mount
+++ b/units/var-lock.mount
@@ -10,6 +10,7 @@ Description=Lock Directory
 Before=local-fs.target
 # skip mounting if the directory does not exist or is a symlink
 ConditionPathIsDirectory=/var/lock
+ConditionPathIsSymbolicLink=!/var/lock
 
 [Mount]
 What=/run/lock
diff --git a/units/var-run.mount b/units/var-run.mount
index c513dfecd2..ab4da424c9 100644
--- a/units/var-run.mount
+++ b/units/var-run.mount
@@ -10,6 +10,7 @@ Description=Runtime Directory
 Before=local-fs.target
 # skip mounting if the directory does not exist or is a symlink
 ConditionPathIsDirectory=/var/run
+ConditionPathIsSymbolicLink=!/var/run
 
 [Mount]
 What=/run