[LTP] [PATCH] SAFE_MOUNT: print debug info about mounting operation

[Murphy Zhou]

Signed-off-by: Murphy Zhou <jencce.kernel@gmail.com>
---
 lib/safe_macros.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/lib/safe_macros.c b/lib/safe_macros.c
index af6dd0716..a66285a0e 100644
--- a/lib/safe_macros.c
+++ b/lib/safe_macros.c
@@ -898,7 +898,24 @@ int safe_mount(const char *file, const int lineno, void (*cleanup_fn)(void),
 	       const void *data)
 {
 	int rval = -1;
+	char cdir[PATH_MAX], mpath[PATH_MAX];
 
+	if (!getcwd(cdir, PATH_MAX)) {
+		tst_resm(TWARN | TERRNO, "Failed to find current directory");
+		return 0;
+	}
+
+	rval = snprintf(mpath, PATH_MAX, "%s/%s", cdir, target);
+	if (rval < 0 || rval >= PATH_MAX) {
+		tst_resm(TWARN | TERRNO,
+			 "snprintf() should have returned %d instead of %d",
+			 PATH_MAX, rval);
+		return 0;
+	}
+
+	tst_resm_(file, lineno, TINFO,
+		"Mounting %s to %s fstyp=%s flags=%x",
+		source, mpath, filesystemtype, mountflags);
 	/*
 	 * Don't try using the kernel's NTFS driver when mounting NTFS, since
 	 * the kernel's NTFS driver doesn't have proper write support.
-- 
2.31.1