* lib/groupio.c, lib/groupio.h, lib/pwio.c, lib/pwio.h,

lib/sgroupio.c, lib/sgroupio.h, lib/shadowio.c, lib/shadowio.h:
	Added *_dbname() functions to retrieve the name of the databases.
	* lib/groupio.c, lib/groupio.h, lib/pwio.c, lib/pwio.h,
	lib/sgroupio.c, lib/sgroupio.h, lib/shadowio.c, lib/shadowio.h:
	*_name() functions renamed *setname().
	* src/grpck.c, src/pwck.c: Likewise.
	* lib/groupio.h, lib/pwio.h, lib/sgroupio.h, lib/shadowio.h: Added
	the name of the arguments to the prototypes.
	* src/chage, src/chfn.c, src/chgpasswd.c, src/chpasswd.c,
	src/chsh.c, src/gpasswd.c, src/groupadd.c, src/groupdel.c,
	src/groupmod.c, src/grpck.c, src/grpconv.c, src/grpunconv.c,
	src/newusers.c, src/passwd.c, src/pwck.c, src/pwconv.c,
	src/pwunconv.c, src/useradd.c, src/userdel.c, src/usermod.c:
	Harmonize the erro & syslog messages in case of failure of the
	*_lock(), *_open(), *_close(), *_unlock(), *_remove() functions.
	* src/chgpasswd.c, src/chpasswd.c, src/usermod.c: Avoid
	capitalized messages.
	* src/chpasswd.c, src/useradd.c, src/usermod.c: Harmonize messages
	in case of inexistent entries.
	* src/usermod.c:  Harmonize messages in case of already existing
	entries.
	* src/newusers.c, src/useradd.c: Simplify PAM error handling.
	* src/useradd.c: Report failures to unlock files (stderr, syslog,
	and audit). But do not fail (continue).
	* src/useradd.c (open_files): Do not report to syslog & audit
	failures to lock or open the databases. This might be harmless,
	and the logs were not already informed that a change was
	requested.
	* src/usermod.c: It's not the account which is unlocked, but its
	password.

src/pwconv.c

@@ -113,22 +113,26 @@ int main (int argc, char **argv)
 	(void) textdomain (PACKAGE);
 
 	if (pw_lock () == 0) {
-		fprintf (stderr, _("%s: can't lock passwd file\n"), Prog);
+		fprintf (stderr,
+		         _("%s: cannot lock %s\n"), Prog, pw_dbname ());
 		fail_exit (E_PWDBUSY);
 	}
 	passwd_locked = true;
 	if (pw_open (O_RDWR) == 0) {
-		fprintf (stderr, _("%s: can't open passwd file\n"), Prog);
+		fprintf (stderr,
+		         _("%s: cannot open %s\n"), Prog, pw_dbname ());
 		fail_exit (E_MISSING);
 	}
 
 	if (spw_lock () == 0) {
-		fprintf (stderr, _("%s: can't lock shadow file\n"), Prog);
+		fprintf (stderr,
+		         _("%s: cannot lock %s\n"), Prog, spw_dbname ());
 		fail_exit (E_PWDBUSY);
 	}
 	shadow_locked = true;
 	if (spw_open (O_CREAT | O_RDWR) == 0) {
-		fprintf (stderr, _("%s: can't open shadow file\n"), Prog);
+		fprintf (stderr,
+		         _("%s: cannot open %s\n"), Prog, spw_dbname ());
 		fail_exit (E_FAILURE);
 	}
 
@@ -146,9 +150,8 @@ int main (int argc, char **argv)
 			 * This shouldn't happen (the entry exists) but...
 			 */
 			fprintf (stderr,
-				 _
-				 ("%s: can't remove shadow entry for %s\n"),
-				 Prog, sp->sp_namp);
+			         _("%s: cannot remove entry '%s' from %s\n"),
+			         Prog, sp->sp_namp, spw_dbname ());
 			fail_exit (E_FAILURE);
 		}
 	}
@@ -201,11 +204,15 @@ int main (int argc, char **argv)
 	}
 
 	if (spw_close () == 0) {
-		fprintf (stderr, _("%s: can't update shadow file\n"), Prog);
+		fprintf (stderr,
+		         _("%s: failure while writing changes to %s\n"),
+		         Prog, spw_dbname ());
 		fail_exit (E_FAILURE);
 	}
 	if (pw_close () == 0) {
-		fprintf (stderr, _("%s: can't update passwd file\n"), Prog);
+		fprintf (stderr,
+		         _("%s: failure while writing changes to %s\n"),
+		         Prog, pw_dbname ());
 		fail_exit (E_FAILURE);
 	}
 	chmod (PASSWD_FILE "-", 0600);	/* /etc/passwd- (backup file) */