src/useradd.c: E_BAD_NAME: Use a different error code for bad login n…

…ames

Wrappers like adduser(8) want to do their own stuff if the login name is
bad.  For that, they need to be able to differentiate such an error.

Closes: <#1103>
Suggested-by: Chris Hofstaedtler <zeha@debian.org>
Cc: Marc 'Zugschlus' Haber <mh+githubvisible@zugschlus.de>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

src/useradd.c

@@ -201,6 +201,7 @@ static bool home_added = false;
 #define E_SUB_UID_UPDATE 16	/* can't update the subordinate uid file */
 #define E_SUB_GID_UPDATE 18	/* can't update the subordinate gid file */
 #endif				/* ENABLE_SUBIDS */
+#define E_BAD_NAME	19	/* Bad login name */
 
 #define DGROUP			"GROUP"
 #define DGROUPS			"GROUPS"
@@ -1549,7 +1550,7 @@ static void process_flags (int argc, char **argv)
 			              user_name, AUDIT_NO_ID,
 			              SHADOW_AUDIT_FAILURE);
 #endif
-			exit (E_BAD_ARG);
+			exit (E_BAD_NAME);
 		}
 		if (!dflg) {
 			char  *uh;