id bug fix: don't point to potentially clobbered static storage

On at least Mac OS, when calling getpwuid twice with the same UID,
the static storage containing results from the first call is
invalidated by the second call.
* src/id.c (main): Point to a copy of the user name string.

diff --git a/src/id.c b/src/id.c
index 9ee52e1fcb1584c4c1cc003887d056d3df607798..a178714fd6ebb942bf0d7f0d1eb7be0f8573bffd 100644 (file)
--- a/src/id.c
+++ b/src/id.c
@@ -211,7 +211,7 @@ of a different user"));
       struct passwd const *pwd;
       euid = geteuid ();
       pwd = getpwuid (euid);
-      user_name = pwd ? pwd->pw_name : NULL;
+      user_name = pwd ? xstrdup (pwd->pw_name) : NULL;
       ruid = getuid ();
       egid = getegid ();
       rgid = getgid ();