Re: [Libguestfs] [nbdkit PATCH] plugin: add and use nbdkit_realpath

Introduce a new helper function to resolve a path name, calling nbdkit_error on failure: other than doing what nbdkit_absolute_path does, it also checks that the file exist (and thus avoid errors later on). Apply it where an existing path is required, both in nbdkit itself and in plugins. Related to: https://bugzilla.redhat.com/show_bug.cgi?id=1527334 --- docs/nbdkit-plugin.pod | 13 +++++++++++++ include/nbdkit-common.h | 1 + plugins/example2/example2.c | 2 +- plugins/file/file.c | 6 +----- plugins/gzip/gzip.c | 2 +- plugins/nbd/nbd.c | 2 +- plugins/split/split.c | 2 +- plugins/vddk/vddk.c | 2 +- plugins/xz/xz.c | 2 +- src/plugins.c | 2 +- src/utils.c | 19 +++++++++++++++++++ 11 files changed, 41 insertions(+), 12 deletions(-) diff --git a/docs/nbdkit-plugin.pod b/docs/nbdkit-plugin.pod index 44822fc..4576635 100644 --- a/docs/nbdkit-plugin.pod +++ b/docs/nbdkit-plugin.pod @@ -207,6 +207,19 @@ C<NULL>. Note that this function does not check that the file exists. The returned string must be freed by the caller. +=head2 C<nbdkit_realpath> + + char *nbdkit_realpath (const char *filename); + +The utility function C<nbdkit_realpath> converts any path to an +absolute path, resolving symlinks. Under the hood, it uses the +C<realpath> function.