[LTP] [PATCH v2 1/5] Add SAFE_SYMLINKAT macro

[Andrea Cervesato]

From: Andrea Cervesato <andrea.cervesato@suse.com>

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
 include/safe_macros_fn.h  |  4 ++++
 include/tst_safe_macros.h |  3 +++
 lib/safe_macros.c         | 20 ++++++++++++++++++++
 3 files changed, 27 insertions(+)

diff --git a/include/safe_macros_fn.h b/include/safe_macros_fn.h
index d256091b7..6d9e72e4f 100644
--- a/include/safe_macros_fn.h
+++ b/include/safe_macros_fn.h
@@ -122,6 +122,10 @@ int safe_symlink(const char *file, const int lineno,
                  void (cleanup_fn)(void), const char *oldpath,
                  const char *newpath);
 
+int safe_symlinkat(const char *file, const int lineno,
+                 void (cleanup_fn)(void), const char *oldpath,
+                 const int newdirfd, const char *newpath);
+
 ssize_t safe_write(const char *file, const int lineno,
 		   void (cleanup_fn)(void), enum safe_write_opts len_strict,
 		   int fildes, const void *buf, size_t nbyte);
diff --git a/include/tst_safe_macros.h b/include/tst_safe_macros.h
index 92b9bc119..47a6f99df 100644
--- a/include/tst_safe_macros.h
+++ b/include/tst_safe_macros.h
@@ -191,6 +191,9 @@ int safe_getgroups(const char *file, const int lineno, int size, gid_t list[]);
 #define SAFE_SYMLINK(oldpath, newpath) \
 	safe_symlink(__FILE__, __LINE__, NULL, (oldpath), (newpath))
 
+#define SAFE_SYMLINKAT(oldpath, newdirfd, newpath) \
+	safe_symlinkat(__FILE__, __LINE__, NULL, (oldpath), (newdirfd), (newpath))
+
 #define SAFE_WRITE(len_strict, fildes, buf, nbyte) \
 	safe_write(__FILE__, __LINE__, NULL, (len_strict), (fildes), (buf), (nbyte))
 
diff --git a/lib/safe_macros.c b/lib/safe_macros.c
index 109268587..f91e77022 100644
--- a/lib/safe_macros.c
+++ b/lib/safe_macros.c
@@ -527,6 +527,26 @@ int safe_symlink(const char *file, const int lineno,
 	return rval;
 }
 
+int safe_symlinkat(const char *file, const int lineno,
+                 void (cleanup_fn)(void), const char *oldpath,
+				 const int newdirfd, const char *newpath)
+{
+	int rval;
+
+	rval = symlinkat(oldpath, newdirfd, newpath);
+
+	if (rval == -1) {
+		tst_brkm_(file, lineno, TBROK | TERRNO, cleanup_fn,
+			"symlinkat(%s,%d,%s) failed", oldpath, newdirfd, newpath);
+	} else if (rval) {
+		tst_brkm_(file, lineno, TBROK | TERRNO, cleanup_fn,
+			"Invalid symlinkat(%s,%d,%s) return value %d", oldpath,
+			newdirfd, newpath, rval);
+	}
+
+	return rval;
+}
+
 ssize_t safe_write(const char *file, const int lineno, void (cleanup_fn) (void),
 		   enum safe_write_opts len_strict, int fildes, const void *buf,
 		   size_t nbyte)

-- 
2.43.0