File crypt-loop-file.patch of Package systemd

Index: systemd-37/src/cryptsetup/cryptsetup-generator.c
===================================================================
--- systemd-37.orig/src/cryptsetup/cryptsetup-generator.c
+++ systemd-37/src/cryptsetup/cryptsetup-generator.c
@@ -138,7 +138,7 @@ static int create_disk(
                 const char *password,
                 const char *options) {
 
-        char *p = NULL, *n = NULL, *d = NULL, *u = NULL, *from = NULL, *to = NULL, *e = NULL;
+        char *p = NULL, *n = NULL, *d = NULL, *u = NULL, *from = NULL, *to = NULL, *e = NULL, *path_file = NULL;
         int r;
         FILE *f = NULL;
         bool noauto, nofail;
@@ -167,10 +167,50 @@ static int create_disk(
                 goto fail;
         }
 
-        if (!(d = unit_name_from_path(u, ".device"))) {
-                r = -ENOMEM;
-                log_error("Failed to allocate device name.");
-                goto fail;
+        if (!startswith(device,"/dev/")) {
+
+                if (!(d = unit_name_build_escape("cryptsetup", name, ".path"))) {
+                        r = -ENOMEM;
+                        log_error("Failed to allocate path name.");
+                        goto fail;
+                }
+
+                if (asprintf(&path_file, "%s/%s", arg_dest, d) < 0) {
+                        r = -ENOMEM;
+                        log_error("Failed to allocate unit file name.");
+                        goto fail;
+                }
+
+                if (!(f = fopen(path_file, "wxe"))) {
+                        r = -errno;
+                        log_error("Failed to create unit file: %m");
+                        goto fail;
+                }
+
+                fprintf(f,
+                        "[Unit]\n"
+                        "Description=Cryptography Setup for %s\n"
+                        "DefaultDependencies=no\n"
+                        "[Path]\n"
+                        "PathExists=%s\n",
+                        device, device);
+
+                fflush(f);
+
+                if (ferror(f)) {
+                        r = -errno;
+                        log_error("Failed to write file: %m");
+                        goto fail;
+                }
+
+                f = NULL;
+        } else {
+
+                if (!(d = unit_name_from_path(u, ".device"))) {
+                        r = -ENOMEM;
+                        log_error("Failed to allocate device name.");
+                        goto fail;
+                }
         }
 
         if (!(f = fopen(p, "wxe"))) {
@@ -300,6 +340,7 @@ fail:
         free(n);
         free(d);
         free(e);
+        free(path_file);
 
         free(from);
         free(to);