tools: lxc-unshare: apply argument parser of lxc and log system of lxc

src/lxc/namespace.c

@@ -115,6 +115,7 @@ pid_t lxc_raw_clone(unsigned long flags)
 			     : "=r"(in_child), "=r"(child_pid)
 			     : "i"(__NR_clone), "r"(flags | SIGCHLD)
 			     : "%o1", "%o0", "%g1");
+
 		if (in_child)
 			return 0;
 		else
@@ -174,6 +175,7 @@ const struct ns_info ns_info[LXC_NS_MAX] = {
 int lxc_namespace_2_cloneflag(const char *namespace)
 {
 	int i;
+
 	for (i = 0; i < LXC_NS_MAX; i++)
 		if (!strcasecmp(ns_info[i].proc_name, namespace))
 			return ns_info[i].clone_flag;
@@ -185,6 +187,7 @@ int lxc_namespace_2_cloneflag(const char *namespace)
 int lxc_namespace_2_ns_idx(const char *namespace)
 {
 	int i;
+
 	for (i = 0; i < LXC_NS_MAX; i++)
 		if (!strcmp(ns_info[i].proc_name, namespace))
 			return i;
@@ -239,7 +242,6 @@ int lxc_fill_namespace_flags(char *flaglist, int *flags)
 
 	token = strtok_r(flaglist, "|", &saveptr);
 	while (token) {
-
 		aflag = lxc_namespace_2_cloneflag(token);
 		if (aflag < 0)
 			return -1;
@@ -248,5 +250,6 @@ int lxc_fill_namespace_flags(char *flaglist, int *flags)
 
 		token = strtok_r(NULL, "|", &saveptr);
 	}
+
 	return 0;
 }

src/lxc/tools/arguments.c

@@ -50,7 +50,6 @@ static int build_shortopts(const struct option *a_options, char *a_shortopts,
 		return -1;
 
 	for (opt = a_options; opt->name; opt++) {
-
 		if (!isascii(opt->val))
 			continue;
 
@@ -163,6 +162,7 @@ See the %s man page for further information.\n\n",
 
 	if (args->helpfn)
 		args->helpfn(args);
+
 	exit(code);
 }
 
@@ -183,6 +183,7 @@ static int lxc_arguments_lxcpath_add(struct lxc_arguments *args,
 		lxc_error(args, "no memory");
 		return -ENOMEM;
 	}
+
 	args->lxcpath[args->lxcpath_cnt++] = lxcpath;
 	return 0;
 }
@@ -207,6 +208,7 @@ extern int lxc_arguments_parse(struct lxc_arguments *args, int argc,
 		c = getopt_long(argc, argv, shortopts, args->options, &index);
 		if (c == -1)
 			break;
+
 		switch (c) {
 		case 'n':
 			args->name = optarg;
@@ -261,7 +263,8 @@ extern int lxc_arguments_parse(struct lxc_arguments *args, int argc,
 	}
 
 	/* Check the command options */
-	if (!args->name && strcmp(args->progname, "lxc-autostart") != 0) {
+	if (!args->name && strncmp(args->progname, "lxc-autostart", strlen(args->progname)) != 0
+	                && strncmp(args->progname, "lxc-unshare", strlen(args->progname)) != 0) {
 		if (args->argv) {
 			args->name = argv[optind];
 			optind++;
@@ -277,9 +280,11 @@ extern int lxc_arguments_parse(struct lxc_arguments *args, int argc,
 
 	if (args->checker)
 		ret = args->checker(args);
+
 error:
 	if (ret)
 		lxc_error(args, "could not parse command line");
+
 	return ret;
 }
 
@@ -333,4 +338,4 @@ bool lxc_setup_shared_ns(struct lxc_arguments *args, struct lxc_container *c)
 	}
 
 	return true;
-}
+}
\ No newline at end of file

src/lxc/tools/arguments.h

@@ -94,7 +94,7 @@ struct lxc_arguments {
 	char *rbdname, *rbdpool;
 	char *zfsroot, *lowerdir, *dir;
 
-	/* lxc-execute */
+	/* lxc-execute and lxc-unshare */
 	uid_t uid;
 	gid_t gid;
 
@@ -137,6 +137,12 @@ struct lxc_arguments {
 	/* lxc-copy */
 	bool tmpfs;
 
+	/* lxc-unshare */
+	int flags;
+	int want_default_mounts;
+	const char *want_hostname;
+	bool setuid;
+
 	/* remaining arguments */
 	char *const *argv;
 	int argc;