glnx-fdio: Add wrappers around fstat() and fstatat() to handle errors

Add two inline wrappers around fstat() and fstatat() which handle
retrying on EINTR and return other errors using GError, to be consistent
with other glnx functions.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

1 files changed, 51 insertions, 0 deletions

diff --git a/glnx-fdio.h b/glnx-fdio.h
index c3e7573..56d0b78 100644
--- a/glnx-fdio.h
+++ b/glnx-fdio.h
@@ -35,6 +35,8 @@
 #include <libgen.h>
 #undef basename
 
+#include <glnx-errors.h>
+
 G_BEGIN_DECLS
 
 /* Irritatingly, g_basename() which is what we want
@@ -155,5 +157,54 @@ int glnx_renameat2_noreplace (int olddirfd, const char *oldpath,
 int glnx_renameat2_exchange (int olddirfd, const char *oldpath,
                              int newdirfd, const char *newpath);
 
+/**
+ * glnx_fstat:
+ * @fd: FD to stat
+ * @buf: (out caller-allocates): Return location for stat details
+ * @error: Return location for a #GError, or %NULL
+ *
+ * Wrapper around fstat() which adds #GError support and ensures that it retries
+ * on %EINTR.
+ *
+ * Returns: %TRUE on success, %FALSE otherwise
+ * Since: UNRELEASED
+ */
+static inline gboolean
+glnx_fstat (int           fd,
+            struct stat  *buf,
+            GError      **error)
+{
+  if (TEMP_FAILURE_RETRY (fstat (fd, buf)) != 0)
+    return glnx_throw_errno (error);
+
+  return TRUE;
+}
+
+/**
+ * glnx_fstatat:
+ * @dfd: Directory FD to stat beneath
+ * @path: Path to stat beneath @dfd
+ * @buf: (out caller-allocates): Return location for stat details
+ * @flags: Flags to pass to fstatat()
+ * @error: Return location for a #GError, or %NULL
+ *
+ * Wrapper around fstatat() which adds #GError support and ensures that it
+ * retries on %EINTR.
+ *
+ * Returns: %TRUE on success, %FALSE otherwise
+ * Since: UNRELEASED
+ */
+static inline gboolean
+glnx_fstatat (int           dfd,
+              const gchar  *path,
+              struct stat  *buf,
+              int           flags,
+              GError      **error)
+{
+  if (TEMP_FAILURE_RETRY (fstatat (dfd, path, buf, flags)) != 0)
+    return glnx_throw_errno (error);
+
+  return TRUE;
+}
 
 G_END_DECLS