option handling: make exceptions more consistent

* doc/coreutils.texi (Common options): Not all utilities reject
option abbreviations.
* src/chroot.c (main): Report correct name on failure.
* src/echo.c (usage): Clarify long option usage.
* src/setuidgid.c (usage): Likewise.
* src/hostid.c (usage): Condense.

doc/coreutils.texi

@@ -681,7 +681,7 @@ abbreviations of those options.  For example, @samp{rmdir
 
 Some of these programs recognize the @option{--help} and @option{--version}
 options only when one of them is the sole command line argument.  For
-these programs, abbreviations of the long options are not recognized.
+these programs, abbreviations of the long options are not always recognized.
 
 @table @samp
 

src/chroot.c

@@ -1,5 +1,5 @@
 /* chroot -- run command or shell with special root directory
-   Copyright (C) 95, 96, 1997, 1999-2004, 2007-2008
+   Copyright (C) 95, 96, 1997, 1999-2004, 2007-2009
    Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
@@ -83,7 +83,8 @@ main (int argc, char **argv)
     }
 
   if (chroot (argv[optind]) != 0)
-    error (EXIT_FAILURE, errno, _("cannot change root directory to %s"), argv[1]);
+    error (EXIT_FAILURE, errno, _("cannot change root directory to %s"),
+	   argv[optind]);
 
   if (chdir ("/"))
     error (EXIT_FAILURE, errno, _("cannot chdir to root directory"));

src/echo.c

@@ -1,5 +1,5 @@
 /* echo.c, derived from code echo.c in Bash.
-   Copyright (C) 87,89, 1991-1997, 1999-2005, 2007-2008 Free Software
+   Copyright (C) 87,89, 1991-1997, 1999-2005, 2007-2009 Free Software
    Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
@@ -41,7 +41,10 @@ usage (int status)
 	     program_name);
   else
     {
-      printf (_("Usage: %s [OPTION]... [STRING]...\n"), program_name);
+      printf (_("\
+Usage: %s [SHORT-OPTION]... [STRING]...\n\
+  or:  %s LONG-OPTION\n\
+"), program_name, program_name);
       fputs (_("\
 Echo the STRING(s) to standard output.\n\
 \n\

src/hostid.c

@@ -1,6 +1,6 @@
 /* print the hexadecimal identifier for the current host
 
-   Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2007-2008 Free
+   Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2007-2009 Free
    Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
@@ -42,12 +42,10 @@ usage (int status)
   else
     {
       printf (_("\
-Usage: %s\n\
-  or:  %s OPTION\n\
+Usage: %s [OPTION]\n\
 Print the numeric identifier (in hexadecimal) for the current host.\n\
 \n\
-"),
-	      program_name, program_name);
+"), program_name);
       fputs (HELP_OPTION_DESCRIPTION, stdout);
       fputs (VERSION_OPTION_DESCRIPTION, stdout);
       emit_bug_reporting_address ();

src/setuidgid.c

@@ -1,5 +1,5 @@
 /* setuidgid - run a command with the UID and GID of a specified user
-   Copyright (C) 2003-2008 Free Software Foundation, Inc.
+   Copyright (C) 2003-2009 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -48,8 +48,8 @@ usage (int status)
   else
     {
       printf (_("\
-Usage: %s OPTION USER COMMAND [ARGUMENT]...\n\
-  or:  %s OPTION\n\
+Usage: %s [SHORT-OPTION]... USER COMMAND [ARGUMENT]...\n\
+  or:  %s LONG-OPTION\n\
 "),
               program_name, program_name);