tools: move lxc-create to API symbols only

Closes #2073.

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

src/lxc/tools/lxc_create.c

@@ -22,16 +22,14 @@
 #include <libgen.h>
 #include <stdint.h>
 #include <stdio.h>
+#include <string.h>
 #include <unistd.h>
-#include <lxc/lxccontainer.h>
 #include <sys/types.h>
 
+#include <lxc/lxccontainer.h>
+
 #include "arguments.h"
-#include "log.h"
-#include "lxc.h"
-#include "storage.h"
-#include "storage_utils.h"
-#include "utils.h"
+#include "tool_utils.h"
 
 static uint64_t get_fssize(char *s)
 {
@@ -203,6 +201,23 @@ static bool validate_bdev_args(struct lxc_arguments *a)
 	return true;
 }
 
+static bool is_valid_storage_type(const char *type)
+{
+	if (strcmp(type, "dir") == 0 ||
+	    strcmp(type, "btrfs") == 0 ||
+	    strcmp(type, "aufs") == 0 ||
+	    strcmp(type, "loop") == 0 ||
+	    strcmp(type, "lvm") == 0 ||
+	    strcmp(type, "nbd") == 0 ||
+	    strcmp(type, "overlay") == 0 ||
+	    strcmp(type, "overlayfs") == 0 ||
+	    strcmp(type, "rbd") == 0 ||
+	    strcmp(type, "zfs") == 0)
+		return true;
+
+	return false;
+}
+
 int main(int argc, char *argv[])
 {
 	struct lxc_container *c;
@@ -225,7 +240,6 @@ int main(int argc, char *argv[])
 
 	if (lxc_log_init(&log))
 		exit(EXIT_FAILURE);
-	lxc_log_options_no_override();
 
 	/* REMOVE IN LXC 3.0 */
 	setenv("LXC_UPDATE_CONFIG_FORMAT", "1", 0);
@@ -286,7 +300,7 @@ int main(int argc, char *argv[])
 	if (my_args.configfile)
 		c->load_config(c, my_args.configfile);
 	else
-		c->load_config(c, lxc_global_config_value("lxc.default_config"));
+		c->load_config(c, lxc_get_global_config_item("lxc.default_config"));
 
 	if (my_args.fstype)
 		spec.fstype = my_args.fstype;

src/lxc/tools/tool_utils.c

@@ -539,3 +539,60 @@ size_t lxc_array_len(void **array)
 
 	return result;
 }
+
+/*
+ * Given the '-t' template option to lxc-create, figure out what to
+ * do.  If the template is a full executable path, use that.  If it
+ * is something like 'sshd', then return $templatepath/lxc-sshd.
+ * On success return the template, on error return NULL.
+ */
+char *get_template_path(const char *t)
+{
+	int ret, len;
+	char *tpath;
+
+	if (t[0] == '/' && access(t, X_OK) == 0) {
+		tpath = strdup(t);
+		return tpath;
+	}
+
+	len = strlen(LXCTEMPLATEDIR) + strlen(t) + strlen("/lxc-") + 1;
+	tpath = malloc(len);
+	if (!tpath)
+		return NULL;
+	ret = snprintf(tpath, len, "%s/lxc-%s", LXCTEMPLATEDIR, t);
+	if (ret < 0 || ret >= len) {
+		free(tpath);
+		return NULL;
+	}
+	if (access(tpath, X_OK) < 0) {
+		fprintf(stderr, "Bad template: %s\n", t);
+		free(tpath);
+		return NULL;
+	}
+
+	return tpath;
+}
+
+int mkdir_p(const char *dir, mode_t mode)
+{
+	const char *tmp = dir;
+	const char *orig = dir;
+	char *makeme;
+
+	do {
+		dir = tmp + strspn(tmp, "/");
+		tmp = dir + strcspn(dir, "/");
+		makeme = strndup(orig, dir - orig);
+		if (*makeme) {
+			if (mkdir(makeme, mode) && errno != EEXIST) {
+				fprintf(stderr, "Failed to create directory \"%s\"\n", makeme);
+				free(makeme);
+				return -1;
+			}
+		}
+		free(makeme);
+	} while(tmp != dir);
+
+	return 0;
+}

src/lxc/tools/tool_utils.h

@@ -139,6 +139,9 @@ extern char **lxc_normalize_path(const char *path);
 extern char *lxc_string_join(const char *sep, const char **parts,
 			     bool use_as_prefix);
 
+extern int mkdir_p(const char *dir, mode_t mode);
 extern int is_dir(const char *path);
 
+extern char *get_template_path(const char *t);
+
 #endif /* __LXC_UTILS_H */