From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx>
Add an API tracefs_list_dup() that will duplicate an existing list.
Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
---
include/tracefs.h | 1 +
src/tracefs-utils.c | 26 ++++++++++++++++++++++++++
2 files changed, 27 insertions(+)
diff --git a/include/tracefs.h b/include/tracefs.h
index f1e4ffa0d65f..6fb66c44afc7 100644
--- a/include/tracefs.h
+++ b/include/tracefs.h
@@ -67,6 +67,7 @@ void tracefs_list_free(char **list);
char **tracefs_list_add(char **list, const char *string);
int tracefs_list_size(char **list);
int tracefs_list_pop(char **list);
+char **tracefs_list_dup(char **list);
/**
* tracefs_trace_on_get_fd - Get a file descriptor of "tracing_on" in given instance
diff --git a/src/tracefs-utils.c b/src/tracefs-utils.c
index 63bb413298fe..8c92d6c54ab1 100644
--- a/src/tracefs-utils.c
+++ b/src/tracefs-utils.c
@@ -489,3 +489,29 @@ int tracefs_list_size(char **list)
list--;
return (int)*(unsigned long *)list;
}
+
+/**
+ * tracefs_list_dup - create a duplicate list
+ * @list: The list to duplicate
+ *
+ * Allocates a new list that can be modified and freed separately.
+ *
+ * Returns a new allocated list that must be freed with
+ * tracefs_list_free(), or NULL on error.
+ */
+char **tracefs_list_dup(char **list)
+{
+ char **new = NULL;
+ char **tmp;
+ int i;
+
+ for (i = 0; list[i]; i++) {
+ tmp = tracefs_list_add(new, list[i]);
+ if (!tmp) {
+ free(new);
+ return NULL;
+ }
+ new = tmp;
+ }
+ return new;
+}
--
2.30.2
