File useradd-mkdirs.patch of Package shadow.12022

https://github.com/shadow-maint/shadow/pull/112

useradd-mkdirs.patch adapted to two comments in https://github.com/shadow-maint/shadow/pull/2
* check for stdup failure
* create dirs with 0755 instead of 0777
diff -urEbwB shadow-4.6/src/useradd.c shadow-4.6.new-useradd-mkdirs/src/useradd.c
--- shadow-4.6/src/useradd.c	2018-04-29 18:42:37.000000000 +0200
+++ shadow-4.6.new-useradd-mkdirs/src/useradd.c	2018-05-15 17:11:03.706371270 +0200
@@ -2018,6 +2018,19 @@
 static void create_home (void)
 {
 	if (access (prefix_user_home, F_OK) != 0) {
+		char path[strlen (prefix_user_home) + 2];
+		char *bhome, *cp;
+
+		path[0] = '\0';
+		bhome = strdup (prefix_user_home);
+		if (!bhome) {
+			fprintf (stderr,
+			         _("%s: error while duplicating string %s\n"),
+			         Prog, user_home);
+			fail_exit (E_HOMEDIR);
+		}
+		++bhome;
+
 #ifdef WITH_SELINUX
 		if (set_selinux_file_context (prefix_user_home) != 0) {
 			fprintf (stderr,
@@ -2026,11 +2039,20 @@
 			fail_exit (E_HOMEDIR);
 		}
 #endif
-		/* XXX - create missing parent directories.  --marekm */
-		if (mkdir (prefix_user_home, 0) != 0) {
+
+		/* Check for every part of the path, if the directory
+		   exists. If not, create it with permissions 755 and
+		   owner root:root.
+		 */
+		cp = strtok (bhome, "/");
+		while (cp) {
+			strcat (path, "/");
+			strcat (path, cp);
+			if (access (path, F_OK) != 0) {
+				if (mkdir (path, 0) != 0) {
 			fprintf (stderr,
 			         _("%s: cannot create directory %s\n"),
-			         Prog, prefix_user_home);
+					         Prog, path);
 #ifdef WITH_AUDIT
 			audit_logger (AUDIT_ADD_USER, Prog,
 			              "adding home directory",
@@ -2039,6 +2061,20 @@
 #endif
 			fail_exit (E_HOMEDIR);
 		}
+				if (chown (path, 0, 0) < 0) {
+					fprintf (stderr,
+					         _("%s: warning: chown on `%s' failed: %m\n"),
+					         Prog, path);
+				}
+				if (chmod (path, 0755) < 0) {
+					fprintf (stderr,
+					         _("%s: warning: chmod on `%s' failed: %m\n"),
+					         Prog, path);
+				}
+			}
+			cp = strtok (NULL, "/");
+		}
+
 		(void) chown (prefix_user_home, user_id, user_gid);
 		chmod (prefix_user_home,
 		       0777 & ~getdef_num ("UMASK", GETDEF_DEFAULT_UMASK));