[RFC PATCH 3/6] libutil: Remove usage of PATH_MAX from getrealpath

When realpath is given a NULL argument, it returns a buffer allocated
with malloc containing the path. Update getrealpath function to rely
on this behaviour instead of using PATH_MAX.

While making this change, verify that callers of getrealpath
responsibly free the returned buffer once they no longer have use for
it.
---
 libutil/find.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/libutil/find.c b/libutil/find.c
index f366004..a009538 100644
--- a/libutil/find.c
+++ b/libutil/find.c
@@ -490,11 +490,11 @@ static int current_entry;			/**< current entry of the stack */
 static char *
 getrealpath(const char *dir)
 {
-	char real[PATH_MAX];
+	char *real;
 
-	if (realpath(dir, real) == NULL)
+	if ((real = realpath(dir, NULL)) == NULL)
 		die("cannot get real path of '%s'.", trimpath(dir));
-	return check_strdup(real);
+	return real;
 }
 /**
  * has_symlinkloop: whether or not dir has a symbolic link loops.
-- 
2.11.0