Preserve errno across free().

Dept. of second thoughts: free() isn't guaranteed not to change errno.
Make sure we report the right error if getcwd() fails.

diff --git a/src/port/path.c b/src/port/path.c
index 438b52960423bfec077e78e7d80246fffa4899ac..3484f2cb6155fc7865adc4c3e4d807a661793ddc 100644 (file)
--- a/src/port/path.c
+++ b/src/port/path.c
@@ -608,7 +608,10 @@ make_absolute_path(const char *path)
                        }
                        else
                        {
+                               int                     save_errno = errno;
+
                                free(buf);
+                               errno = save_errno;
 #ifndef FRONTEND
                                elog(ERROR, "could not get current working directory: %m");
 #else