On old glibc, reallocarray was not introduced, so this case compiles failed.
We should use reallocarray if glibc supports and use realloc if glibcs doesn't
support reallocarray.
Signed-off-by: Yang Xu <xuyang2018.jy@xxxxxxxxxxx>
---
configure.ac | 1 +
src/idmapped-mounts/idmapped-mounts.c | 4 ++++
2 files changed, 5 insertions(+)
diff --git a/configure.ac b/configure.ac
index 0b55455a..6e5ab397 100644
--- a/configure.ac
+++ b/configure.ac
@@ -68,6 +68,7 @@ AC_PACKAGE_WANT_LIBBTRFSUTIL
AC_HAVE_COPY_FILE_RANGE
AC_CHECK_FUNCS([renameat2])
+AC_CHECK_FUNCS([reallocarray])
AC_CHECK_TYPES([struct mount_attr], [], [], [[#include <linux/mount.h>]])
AC_CHECK_TYPES([struct btrfs_qgroup_limit], [], [], [[
#include <stddef.h>
diff --git a/src/idmapped-mounts/idmapped-mounts.c b/src/idmapped-mounts/idmapped-mounts.c
index 4230cb48..83b7c89a 100644
--- a/src/idmapped-mounts/idmapped-mounts.c
+++ b/src/idmapped-mounts/idmapped-mounts.c
@@ -9910,8 +9910,12 @@ static int append_stack(struct btrfs_iter *iter, uint64_t tree_id, size_t path_l
if (iter->stack_len >= iter->stack_capacity) {
size_t new_capacity = iter->stack_capacity * 2;
struct btrfs_stack *new_search_stack;
+#ifdef HAVE_REALLOCARRAY
new_search_stack = reallocarray(iter->search_stack, new_capacity,
sizeof(*iter->search_stack));
+#else
+ new_search_stack = realloc(iter->search_stack, new_capacity * sizeof(*iter->search_stack));
+#endif
if (!new_search_stack)
return -ENOMEM;
--
2.23.0
