Sync usage with man page.

[netbsd-mini2440.git] / external / gpl2 / xcvs / dist / src / admin.c

/*
 * Copyright (C) 1986-2005 The Free Software Foundation, Inc.
 *
 * Portions Copyright (C) 1998-2005 Derek Price, Ximbiot <http://ximbiot.com>,
 *                                  and others.
 *
 * Portions Copyright (c) 1992, Brian Berliner and Jeff Polk
 * Portions Copyright (c) 1989-1992, Brian Berliner
 * 
 * You may distribute under the terms of the GNU General Public License as
 * specified in the README file that comes with the CVS source distribution.
 * 
 * Administration ("cvs admin")
 * 
 */

#include "cvs.h"
#include <grp.h>

static Dtype admin_dirproc (void *callerdat, const char *dir,
                            const char *repos, const char *update_dir,
                            List *entries);
static int admin_fileproc (void *callerdat, struct file_info *finfo);

static const char *const admin_usage[] =
{
    "Usage: %s %s [options] files...\n",
    "\t-a users   Append (comma-separated) user names to access list.\n",
    "\t-A file    Append another file's access list.\n",
    "\t-b[rev]    Set default branch (highest branch on trunk if omitted).\n",
    "\t-c string  Set comment leader.\n",
    "\t-e[users]  Remove (comma-separated) user names from access list\n",
    "\t           (all names if omitted).\n",
    "\t-I         Run interactively.\n",
    "\t-k subst   Set keyword substitution mode:\n",
    "\t   kv   (Default) Substitute keyword and value.\n",
    "\t   kvl  Substitute keyword, value, and locker (if any).\n",
    "\t   k    Substitute keyword only.\n",
    "\t   o    Preserve original string.\n",
    "\t   b    Like o, but mark file as binary.\n",
    "\t   v    Substitute value only.\n",
    "\t-l[rev]    Lock revision (latest revision on branch,\n",
    "\t           latest revision on trunk if omitted).\n",
    "\t-L         Set strict locking.\n",
    "\t-m rev:msg  Replace revision's log message.\n",
    "\t-n tag[:[rev]]  Tag branch or revision.  If :rev is omitted,\n",
    "\t                delete the tag; if rev is omitted, tag the latest\n",
    "\t                revision on the default branch.\n",
    "\t-N tag[:[rev]]  Same as -n except override existing tag.\n",
    "\t-o range   Delete (outdate) specified range of revisions:\n",
    "\t   rev1:rev2   Between rev1 and rev2, including rev1 and rev2.\n",
    "\t   rev1::rev2  Between rev1 and rev2, excluding rev1 and rev2.\n",
    "\t   rev:        rev and following revisions on the same branch.\n",
    "\t   rev::       After rev on the same branch.\n",
    "\t   :rev        rev and previous revisions on the same branch.\n",
    "\t   ::rev       Before rev on the same branch.\n",
    "\t   rev         Just rev.\n",
    "\t-q         Run quietly.\n",
    "\t-s state[:rev]  Set revision state (latest revision on branch,\n",
    "\t                latest revision on trunk if omitted).\n",
    "\t-t[file]   Get descriptive text from file (stdin if omitted).\n",
    "\t-t-string  Set descriptive text.\n",
    "\t-u[rev]    Unlock the revision (latest revision on branch,\n",
    "\t           latest revision on trunk if omitted).\n",
    "\t-U         Unset strict locking.\n",
    "(Specify the --help global option for a list of other help options)\n",
    NULL
};

/* This structure is used to pass information through start_recursion.  */
struct admin_data
{
    /* Set default branch (-b).  It is "-b" followed by the value
       given, or NULL if not specified, or merely "-b" if -b is
       specified without a value.  */
    char *branch;

    /* Set comment leader (-c).  It is "-c" followed by the value
       given, or NULL if not specified.  The comment leader is
       relevant only for old versions of RCS, but we let people set it
       anyway.  */
    char *comment;

    /* Set strict locking (-L).  */
    int set_strict;

    /* Set nonstrict locking (-U).  */
    int set_nonstrict;

    /* Delete revisions (-o).  It is "-o" followed by the value specified.  */
    char *delete_revs;

    /* Keyword substitution mode (-k), e.g. "-kb".  */
    char *kflag;

    /* Description (-t).  */
    char *desc;

    /* Interactive (-I).  Problematic with client/server.  */
    int interactive;

    /* This is the cheesy part.  It is a vector with the options which
       we don't deal with above (e.g. "-afoo" "-abar,baz").  In the future
       this presumably will be replaced by other variables which break
       out the data in a more convenient fashion.  AV as well as each of
       the strings it points to is malloc'd.  */
    int ac;
    char **av;
    int av_alloc;

    /* This contains a printable version of the command line used
     * for logging
     */
    char *cmdline;
};

/* Add an argument.  OPT is the option letter, e.g. 'a'.  ARG is the
   argument to that option, or NULL if omitted (whether NULL can actually
   happen depends on whether the option was specified as optional to
   getopt).  */
static void
arg_add (struct admin_data *dat, int opt, char *arg)
{
    char *newelt = Xasprintf ("-%c%s", opt, arg ? arg : "");

    if (dat->av_alloc == 0)
    {
        dat->av_alloc = 1;
        dat->av = xnmalloc (dat->av_alloc, sizeof (*dat->av));
    }
    else if (dat->ac >= dat->av_alloc)
    {
        dat->av_alloc *= 2;
        dat->av = xnrealloc (dat->av, dat->av_alloc, sizeof (*dat->av));
    }
    dat->av[dat->ac++] = newelt;
}



/*
 * callback proc to run a script when admin finishes.
 */
static int
postadmin_proc (const char *repository, const char *filter, void *closure)
{
    char *cmdline;
    const char *srepos = Short_Repository (repository);

    TRACE (TRACE_FUNCTION, "postadmin_proc (%s, %s)", repository, filter);

    /* %c = cvs_cmd_name
     * %R = referrer
     * %p = shortrepos
     * %r = repository
     */
    /*
     * Cast any NULL arguments as appropriate pointers as this is an
     * stdarg function and we need to be certain the caller gets what
     * is expected.
     */
    cmdline = format_cmdline (
#ifdef SUPPORT_OLD_INFO_FMT_STRINGS
                              false, srepos,
#endif /* SUPPORT_OLD_INFO_FMT_STRINGS */
                              filter,
                              "c", "s", cvs_cmd_name,
#ifdef SERVER_SUPPORT
                              "R", "s", referrer ? referrer->original : "NONE",
#endif /* SERVER_SUPPORT */
                              "p", "s", srepos,
                              "r", "s", current_parsed_root->directory,
                              (char *) NULL);

    if (!cmdline || !strlen (cmdline))
    {
        if (cmdline) free (cmdline);
        error (0, 0, "postadmin proc resolved to the empty string!");
        return 1;
    }

    run_setup (cmdline);

    free (cmdline);

    /* FIXME - read the comment in verifymsg_proc() about why we use abs()
     * below() and shouldn't.
     */
    return abs (run_exec (RUN_TTY, RUN_TTY, RUN_TTY,
                          RUN_NORMAL | RUN_SIGIGNORE));
}



/*
 * Call any postadmin procs.
 */
static int
admin_filesdoneproc (void *callerdat, int err, const char *repository,
                     const char *update_dir, List *entries)
{
    TRACE (TRACE_FUNCTION, "admin_filesdoneproc (%d, %s, %s)", err, repository,
           update_dir);
    Parse_Info (CVSROOTADM_POSTADMIN, repository, postadmin_proc, PIOPT_ALL,
                NULL);

    return err;
}


static size_t
wescape (char *dst, const char *src)
{
    const unsigned char *s = src;
    char *d = dst;
    for (; *s; s++) {
        if (!isprint(*s) || isspace(*s) || *s == '|') {
            *d++ = '\\';
            *d++ = ((*s >> 6) & 3) + '0';
            *d++ = ((*s >> 3) & 7) + '0';
            *d++ = ((*s >> 0) & 7) + '0';
        } else  {
            *d++ = *s;
        }
    }
    *d = '\0';
    return d - dst;
}

static char *
makecmdline (int argc, char **argv)
{
    size_t clen = 1024, wlen = 1024, len, cpos = 0, i;
    char *cmd = xmalloc(clen);
    char *word = xmalloc(wlen);

    for (i = 0; i < argc; i++) {
        char *arg = (strncmp(argv[i], "cvs ", 4) == 0) ? argv[i] + 4 : argv[i];
        len = strlen(arg);
        if (len * 4 < wlen) {
            wlen += len * 4;
            word = xrealloc(word, wlen);
        }
        len = wescape(word, arg);
        if (clen - cpos < len + 2) {
            clen += len + 2;
            cmd = xrealloc(cmd, clen);
        }
        memcpy(&cmd[cpos], word, len);
        cpos += len;
        cmd[cpos++] = ' ';
    }
    if (cpos != 0)
        cmd[cpos - 1] = '\0';
    else
        cmd[cpos] = '\0';
    free(word);
    return cmd;
}

int
admin_group_member (void)
{
    struct group *grp;
    int i;

    if (config == NULL || config->UserAdminGroup == NULL)
        return 1;

    if ((grp = getgrnam(config->UserAdminGroup)) == NULL)
        return 0;

    {
#ifdef HAVE_GETGROUPS
        gid_t *grps;
        int n;

        /* get number of auxiliary groups */
        n = getgroups (0, NULL);
        if (n < 0)
            error (1, errno, "unable to get number of auxiliary groups");
        grps = (gid_t *) xmalloc((n + 1) * sizeof *grps);
        n = getgroups (n, grps);
        if (n < 0)
            error (1, errno, "unable to get list of auxiliary groups");
        grps[n] = getgid();
        for (i = 0; i <= n; i++)
            if (grps[i] == grp->gr_gid) break;
        free (grps);
        if (i > n)
            return 0;
#else
        char *me = getcaller();
        char **grnam;
        
        for (grnam = grp->gr_mem; *grnam; grnam++)
            if (strcmp (*grnam, me) == 0) break;
        if (!*grnam && getgid() != grp->gr_gid)
            return 0;
#endif
    }
    return 1;
}

int
admin (int argc, char **argv)
{
    int err;
    struct admin_data admin_data;
    int c;
    int i;
    bool only_allowed_options;

    if (argc <= 1)
        usage (admin_usage);

    wrap_setup ();

    memset (&admin_data, 0, sizeof admin_data);
    admin_data.cmdline = makecmdline (argc, argv);

    /* TODO: get rid of `-' switch notation in admin_data.  For
       example, admin_data->branch should be not `-bfoo' but simply `foo'. */

    getoptreset ();
    only_allowed_options = true;
    while ((c = getopt (argc, argv,
                        "+ib::c:a:A:e::l::u::LUn:N:m:o:s:t::IqxV:k:")) != -1)
    {
        if (config != NULL) {
            if (c != 'q' && !strchr (config->UserAdminOptions, c))
                only_allowed_options = false;
        } else {
#ifdef CLIENT_SUPPORT
            assert(current_parsed_root->isremote);
            only_allowed_options = false;
#else
            assert(0); /* config should not be NULL, except in a client */
#endif
        }

        switch (c)
        {
            case 'i':
                /* This has always been documented as useless in cvs.texinfo
                   and it really is--admin_fileproc silently does nothing
                   if vers->vn_user is NULL. */
                error (0, 0, "the -i option to admin is not supported");
                error (0, 0, "run add or import to create an RCS file");
                goto usage_error;

            case 'b':
                if (admin_data.branch != NULL)
                {
                    error (0, 0, "duplicate 'b' option");
                    goto usage_error;
                }
                if (optarg == NULL)
                    admin_data.branch = xstrdup ("-b");
                else
                    admin_data.branch = Xasprintf ("-b%s", optarg);
                break;

            case 'c':
                if (admin_data.comment != NULL)
                {
                    error (0, 0, "duplicate 'c' option");
                    goto usage_error;
                }
                admin_data.comment = Xasprintf ("-c%s", optarg);
                break;

            case 'a':
                arg_add (&admin_data, 'a', optarg);
                break;

            case 'A':
                /* In the client/server case, this is cheesy because
                   we just pass along the name of the RCS file, which
                   then will want to exist on the server.  This is
                   accidental; having the client specify a pathname on
                   the server is not a design feature of the protocol.  */
                arg_add (&admin_data, 'A', optarg);
                break;

            case 'e':
                arg_add (&admin_data, 'e', optarg);
                break;

            case 'l':
                /* Note that multiple -l options are valid.  */
                arg_add (&admin_data, 'l', optarg);
                break;

            case 'u':
                /* Note that multiple -u options are valid.  */
                arg_add (&admin_data, 'u', optarg);
                break;

            case 'L':
                /* Probably could also complain if -L is specified multiple
                   times, although RCS doesn't and I suppose it is reasonable
                   just to have it mean the same as a single -L.  */
                if (admin_data.set_nonstrict)
                {
                    error (0, 0, "-U and -L are incompatible");
                    goto usage_error;
                }
                admin_data.set_strict = 1;
                break;

            case 'U':
                /* Probably could also complain if -U is specified multiple
                   times, although RCS doesn't and I suppose it is reasonable
                   just to have it mean the same as a single -U.  */
                if (admin_data.set_strict)
                {
                    error (0, 0, "-U and -L are incompatible");
                    goto usage_error;
                }
                admin_data.set_nonstrict = 1;
                break;

            case 'n':
                /* Mostly similar to cvs tag.  Could also be parsing
                   the syntax of optarg, although for now we just pass
                   it to rcs as-is.  Note that multiple -n options are
                   valid.  */
                arg_add (&admin_data, 'n', optarg);
                break;

            case 'N':
                /* Mostly similar to cvs tag.  Could also be parsing
                   the syntax of optarg, although for now we just pass
                   it to rcs as-is.  Note that multiple -N options are
                   valid.  */
                arg_add (&admin_data, 'N', optarg);
                break;

            case 'm':
                /* Change log message.  Could also be parsing the syntax
                   of optarg, although for now we just pass it to rcs
                   as-is.  Note that multiple -m options are valid.  */
                arg_add (&admin_data, 'm', optarg);
                break;

            case 'o':
                /* Delete revisions.  Probably should also be parsing the
                   syntax of optarg, so that the client can give errors
                   rather than making the server take care of that.
                   Other than that I'm not sure whether it matters much
                   whether we parse it here or in admin_fileproc.

                   Note that multiple -o options are invalid, in RCS
                   as well as here.  */

                if (admin_data.delete_revs != NULL)
                {
                    error (0, 0, "duplicate '-o' option");
                    goto usage_error;
                }
                admin_data.delete_revs = Xasprintf ("-o%s", optarg);
                break;

            case 's':
                /* Note that multiple -s options are valid.  */
                arg_add (&admin_data, 's', optarg);
                break;

            case 't':
                if (admin_data.desc != NULL)
                {
                    error (0, 0, "duplicate 't' option");
                    goto usage_error;
                }
                if (optarg != NULL && optarg[0] == '-')
                    admin_data.desc = xstrdup (optarg + 1);
                else
                {
                    size_t bufsize = 0;
                    size_t len;

                    get_file (optarg, optarg, "r", &admin_data.desc,
                              &bufsize, &len);
                }
                break;

            case 'I':
                /* At least in RCS this can be specified several times,
                   with the same meaning as being specified once.  */
                admin_data.interactive = 1;
                break;

            case 'q':
                /* Silently set the global really_quiet flag.  This keeps admin in
                 * sync with the RCS man page and allows us to silently support
                 * older servers when necessary.
                 *
                 * Some logic says we might want to output a deprecation warning
                 * here, but I'm opting not to in order to stay quietly in sync
                 * with the RCS man page.
                 */
                really_quiet = 1;
                break;

            case 'x':
                error (0, 0, "the -x option has never done anything useful");
                error (0, 0, "RCS files in CVS always end in ,v");
                goto usage_error;

            case 'V':
                /* No longer supported. */
                error (0, 0, "the `-V' option is obsolete");
                break;

            case 'k':
                if (admin_data.kflag != NULL)
                {
                    error (0, 0, "duplicate '-k' option");
                    goto usage_error;
                }
                admin_data.kflag = RCS_check_kflag (optarg);
                break;
            default:
            case '?':
                /* getopt will have printed an error message.  */

            usage_error:
                /* Don't use cvs_cmd_name; it might be "server".  */
                error (1, 0, "specify %s -H admin for usage information",
                       program_name);
        }
    }
    argc -= optind;
    argv += optind;

    /* The use of `cvs admin -k' is unrestricted.  However, any other
       option is restricted if the group CVS_ADMIN_GROUP exists on the
       server.  */
    /* This is only "secure" on the server, since the user could edit the
     * RCS file on a local host, but some people like this kind of
     * check anyhow.  The alternative would be to check only when
     * (server_active) rather than when not on the client.
     */
    if (!only_allowed_options && !admin_group_member())
        error (1, 0, "usage is restricted to members of the group %s",
               CVS_ADMIN_GROUP);

    for (i = 0; i < admin_data.ac; ++i)
    {
        assert (admin_data.av[i][0] == '-');
        switch (admin_data.av[i][1])
        {
            case 'm':
            case 'l':
            case 'u':
                check_numeric (&admin_data.av[i][2], argc, argv);
                break;
            default:
                break;
        }
    }
    if (admin_data.branch != NULL)
        check_numeric (admin_data.branch + 2, argc, argv);
    if (admin_data.delete_revs != NULL)
    {
        char *p;

        check_numeric (admin_data.delete_revs + 2, argc, argv);
        p = strchr (admin_data.delete_revs + 2, ':');
        if (p != NULL && isdigit ((unsigned char) p[1]))
            check_numeric (p + 1, argc, argv);
        else if (p != NULL && p[1] == ':' && isdigit ((unsigned char) p[2]))
            check_numeric (p + 2, argc, argv);
    }

#ifdef CLIENT_SUPPORT
    if (current_parsed_root->isremote)
    {
        /* We're the client side.  Fire up the remote server.  */
        start_server ();
        
        ign_setup ();

        /* Note that option_with_arg does not work for us, because some
           of the options must be sent without a space between the option
           and its argument.  */
        if (admin_data.interactive)
            error (1, 0, "-I option not useful with client/server");
        if (admin_data.branch != NULL)
            send_arg (admin_data.branch);
        if (admin_data.comment != NULL)
            send_arg (admin_data.comment);
        if (admin_data.set_strict)
            send_arg ("-L");
        if (admin_data.set_nonstrict)
            send_arg ("-U");
        if (admin_data.delete_revs != NULL)
            send_arg (admin_data.delete_revs);
        if (admin_data.desc != NULL)
        {
            char *p = admin_data.desc;
            send_to_server ("Argument -t-", 0);
            while (*p)
            {
                if (*p == '\n')
                {
                    send_to_server ("\012Argumentx ", 0);
                    ++p;
                }
                else
                {
                    char *q = strchr (p, '\n');
                    if (q == NULL) q = p + strlen (p);
                    send_to_server (p, q - p);
                    p = q;
                }
            }
            send_to_server ("\012", 1);
        }
        /* Send this for all really_quiets since we know that it will be silently
         * ignored when unneeded.  This supports old servers.
         */
        if (really_quiet)
            send_arg ("-q");
        if (admin_data.kflag != NULL)
            send_arg (admin_data.kflag);

        for (i = 0; i < admin_data.ac; ++i)
            send_arg (admin_data.av[i]);

        send_arg ("--");
        send_files (argc, argv, 0, 0, SEND_NO_CONTENTS);
        send_file_names (argc, argv, SEND_EXPAND_WILD);
        send_to_server ("admin\012", 0);
        err = get_responses_and_close ();
        goto return_it;
    }
#endif /* CLIENT_SUPPORT */

    lock_tree_promotably (argc, argv, 0, W_LOCAL, 0);

    err = start_recursion
            (admin_fileproc, admin_filesdoneproc, admin_dirproc,
             NULL, &admin_data,
             argc, argv, 0,
             W_LOCAL, 0, CVS_LOCK_WRITE, NULL, 1, NULL);

    Lock_Cleanup ();

/* This just suppresses a warning from -Wall.  */
#ifdef CLIENT_SUPPORT
 return_it:
#endif /* CLIENT_SUPPORT */
    if (admin_data.cmdline != NULL)
        free (admin_data.cmdline);
    if (admin_data.branch != NULL)
        free (admin_data.branch);
    if (admin_data.comment != NULL)
        free (admin_data.comment);
    if (admin_data.delete_revs != NULL)
        free (admin_data.delete_revs);
    if (admin_data.kflag != NULL)
        free (admin_data.kflag);
    if (admin_data.desc != NULL)
        free (admin_data.desc);
    for (i = 0; i < admin_data.ac; ++i)
        free (admin_data.av[i]);
    if (admin_data.av != NULL)
        free (admin_data.av);

    return err;
}



/*
 * Called to run "rcs" on a particular file.
 */
/* ARGSUSED */
static int
admin_fileproc (void *callerdat, struct file_info *finfo)
{
    struct admin_data *admin_data = (struct admin_data *) callerdat;
    Vers_TS *vers;
    char *version;
    int i;
    int status = 0;
    RCSNode *rcs, *rcs2;

    vers = Version_TS (finfo, NULL, NULL, NULL, 0, 0);

    version = vers->vn_user;
    if (version != NULL && strcmp (version, "0") == 0)
    {
        error (0, 0, "cannot admin newly added file `%s'", finfo->file);
        status = 1;
        goto exitfunc;
    }

    history_write ('X', finfo->update_dir, admin_data->cmdline, finfo->file,
        finfo->repository);
    rcs = vers->srcfile;
    if (rcs == NULL)
    {
        if (!really_quiet)
            error (0, 0, "nothing known about %s", finfo->file);
        status = 1;
        goto exitfunc;
    }

    if (rcs->flags & PARTIAL)
        RCS_reparsercsfile (rcs, NULL, NULL);

    if (!really_quiet)
    {
        cvs_output ("RCS file: ", 0);
        cvs_output (rcs->path, 0);
        cvs_output ("\n", 1);
    }

    if (admin_data->branch != NULL)
    {
        char *branch = &admin_data->branch[2];
        if (*branch != '\0' && ! isdigit ((unsigned char) *branch))
        {
            branch = RCS_whatbranch (rcs, admin_data->branch + 2);
            if (branch == NULL)
            {
                error (0, 0, "%s: Symbolic name %s is undefined.",
                                rcs->path, admin_data->branch + 2);
                status = 1;
            }
        }
        if (status == 0)
            RCS_setbranch (rcs, branch);
        if (branch != NULL && branch != &admin_data->branch[2])
            free (branch);
    }
    if (admin_data->comment != NULL)
    {
        if (rcs->comment != NULL)
            free (rcs->comment);
        rcs->comment = xstrdup (admin_data->comment + 2);
    }
    if (admin_data->set_strict)
        rcs->strict_locks = 1;
    if (admin_data->set_nonstrict)
        rcs->strict_locks = 0;
    if (admin_data->delete_revs != NULL)
    {
        char *s, *t, *rev1, *rev2;
        /* Set for :, clear for ::.  */
        int inclusive;
        char *t2;

        s = admin_data->delete_revs + 2;
        inclusive = 1;
        t = strchr (s, ':');
        if (t != NULL)
        {
            if (t[1] == ':')
            {
                inclusive = 0;
                t2 = t + 2;
            }
            else
                t2 = t + 1;
        }

        /* Note that we don't support '-' for ranges.  RCS considers it
           obsolete and it is problematic with tags containing '-'.  "cvs log"
           has made the same decision.  */

        if (t == NULL)
        {
            /* -orev */
            rev1 = xstrdup (s);
            rev2 = xstrdup (s);
        }
        else if (t == s)
        {
            /* -o:rev2 */
            rev1 = NULL;
            rev2 = xstrdup (t2);
        }
        else
        {
            *t = '\0';
            rev1 = xstrdup (s);
            *t = ':';   /* probably unnecessary */
            if (*t2 == '\0')
                /* -orev1: */
                rev2 = NULL;
            else
                /* -orev1:rev2 */
                rev2 = xstrdup (t2);
        }

        if (rev1 == NULL && rev2 == NULL)
        {
            /* RCS segfaults if `-o:' is given */
            error (0, 0, "no valid revisions specified in `%s' option",
                   admin_data->delete_revs);
            status = 1;
        }
        else
        {
            status |= RCS_delete_revs (rcs, rev1, rev2, inclusive);
            if (rev1)
                free (rev1);
            if (rev2)
                free (rev2);
        }
    }
    if (admin_data->desc != NULL)
    {
        free (rcs->desc);
        rcs->desc = xstrdup (admin_data->desc);
    }
    if (admin_data->kflag != NULL)
    {
        char *kflag = admin_data->kflag + 2;
        char *oldexpand = RCS_getexpand (rcs);
        if (oldexpand == NULL || strcmp (oldexpand, kflag) != 0)
            RCS_setexpand (rcs, kflag);
    }

    /* Handle miscellaneous options.  TODO: decide whether any or all
       of these should have their own fields in the admin_data
       structure. */
    for (i = 0; i < admin_data->ac; ++i)
    {
        char *arg;
        char *p, *rev, *revnum, *tag, *msg;
        char **users;
        int argc, u;
        Node *n;
        RCSVers *delta;
        
        arg = admin_data->av[i];
        switch (arg[1])
        {
            case 'a': /* fall through */
            case 'e':
                line2argv (&argc, &users, arg + 2, " ,\t\n");
                if (arg[1] == 'a')
                    for (u = 0; u < argc; ++u)
                        RCS_addaccess (rcs, users[u]);
                else if (argc == 0)
                    RCS_delaccess (rcs, NULL);
                else
                    for (u = 0; u < argc; ++u)
                        RCS_delaccess (rcs, users[u]);
                free_names (&argc, users);
                break;
            case 'A':

                /* See admin-19a-admin and friends in sanity.sh for
                   relative pathnames.  It makes sense to think in
                   terms of a syntax which give pathnames relative to
                   the repository or repository corresponding to the
                   current directory or some such (and perhaps don't
                   include ,v), but trying to worry about such things
                   is a little pointless unless you first worry about
                   whether "cvs admin -A" as a whole makes any sense
                   (currently probably not, as access lists don't
                   affect the behavior of CVS).  */

                rcs2 = RCS_parsercsfile (arg + 2);
                if (rcs2 == NULL)
                    error (1, 0, "cannot continue");

                p = xstrdup (RCS_getaccess (rcs2));
                line2argv (&argc, &users, p, " \t\n");
                free (p);
                freercsnode (&rcs2);

                for (u = 0; u < argc; ++u)
                    RCS_addaccess (rcs, users[u]);
                free_names (&argc, users);
                break;
            case 'n': /* fall through */
            case 'N':
                if (arg[2] == '\0')
                {
                    cvs_outerr ("missing symbolic name after ", 0);
                    cvs_outerr (arg, 0);
                    cvs_outerr ("\n", 1);
                    break;
                }
                p = strchr (arg, ':');
                if (p == NULL)
                {
                    if (RCS_deltag (rcs, arg + 2) != 0)
                    {
                        error (0, 0, "%s: Symbolic name %s is undefined.",
                               rcs->path, 
                               arg + 2);
                        status = 1;
                        continue;
                    }
                    break;
                }
                *p = '\0';
                tag = xstrdup (arg + 2);
                *p++ = ':';

                /* Option `n' signals an error if this tag is already bound. */
                if (arg[1] == 'n')
                {
                    n = findnode (RCS_symbols (rcs), tag);
                    if (n != NULL)
                    {
                        error (0, 0,
                               "%s: symbolic name %s already bound to %s",
                               rcs->path,
                               tag, (char *)n->data);
                        status = 1;
                        free (tag);
                        continue;
                    }
                }

                /* Attempt to perform the requested tagging.  */

                if ((*p == 0 && (rev = RCS_head (rcs)))
                    || (rev = RCS_tag2rev (rcs, p))) /* tag2rev may exit */
                {
                    RCS_check_tag (tag); /* exit if not a valid tag */
                    RCS_settag (rcs, tag, rev);
                    free (rev);
                }
                else
                {
                    if (!really_quiet)
                        error (0, 0,
                               "%s: Symbolic name or revision %s is undefined.",
                               rcs->path, p);
                    status = 1;
                }
                free (tag);
                break;
            case 's':
                p = strchr (arg, ':');
                if (p == NULL)
                {
                    tag = xstrdup (arg + 2);
                    rev = RCS_head (rcs);
                    if (!rev)
                    {
                        error (0, 0, "No head revision in archive file `%s'.",
                               rcs->path);
                        status = 1;
                        continue;
                    }
                }
                else
                {
                    *p = '\0';
                    tag = xstrdup (arg + 2);
                    *p++ = ':';
                    rev = xstrdup (p);
                }
                revnum = RCS_gettag (rcs, rev, 0, NULL);
                if (revnum != NULL)
                {
                    n = findnode (rcs->versions, revnum);
                    free (revnum);
                }
                else
                    n = NULL;
                if (n == NULL)
                {
                    error (0, 0,
                           "%s: can't set state of nonexisting revision %s",
                           rcs->path,
                           rev);
                    free (rev);
                    status = 1;
                    continue;
                }
                free (rev);
                delta = n->data;
                free (delta->state);
                delta->state = tag;
                break;

            case 'm':
                p = strchr (arg, ':');
                if (p == NULL)
                {
                    error (0, 0, "%s: -m option lacks revision number",
                           rcs->path);
                    status = 1;
                    continue;
                }
                *p = '\0';      /* temporarily make arg+2 its own string */
                rev = RCS_gettag (rcs, arg + 2, 1, NULL); /* Force tag match */
                if (rev == NULL)
                {
                    error (0, 0, "%s: no such revision %s", rcs->path, arg+2);
                    status = 1;
                    *p = ':';   /* restore the full text of the -m argument */
                    continue;
                }
                msg = p+1;

                n = findnode (rcs->versions, rev);
                /* tags may exist against non-existing versions */
                if (n == NULL)
                {
                     error (0, 0, "%s: no such revision %s: %s",
                            rcs->path, arg+2, rev);
                    status = 1;
                    *p = ':';   /* restore the full text of the -m argument */
                    free (rev);
                    continue;
                }
                *p = ':';       /* restore the full text of the -m argument */
                free (rev);

                delta = n->data;
                if (delta->text == NULL)
                {
                    delta->text = xmalloc (sizeof (Deltatext));
                    memset (delta->text, 0, sizeof (Deltatext));
                }
                delta->text->version = xstrdup (delta->version);
                delta->text->log = make_message_rcsvalid (msg);
                break;

            case 'l':
                status |= RCS_lock (rcs, arg[2] ? arg + 2 : NULL, 0);
                break;
            case 'u':
                status |= RCS_unlock (rcs, arg[2] ? arg + 2 : NULL, 0);
                break;
            default: assert(0); /* can't happen */
        }
    }

    if (status == 0)
    {
        RCS_rewrite (rcs, NULL, NULL);
        if (!really_quiet)
            cvs_output ("done\n", 5);
    }
    else
    {
        /* Note that this message should only occur after another
           message has given a more specific error.  The point of this
           additional message is to make it clear that the previous problems
           caused CVS to forget about the idea of modifying the RCS file.  */
        if (!really_quiet)
            error (0, 0, "RCS file for `%s' not modified.", finfo->file);
        RCS_abandon (rcs);
    }

  exitfunc:
    freevers_ts (&vers);
    return status;
}



/*
 * Print a warm fuzzy message
 */
/* ARGSUSED */
static Dtype
admin_dirproc (void *callerdat, const char *dir, const char *repos,
               const char *update_dir, List *entries)
{
    if (!quiet)
        error (0, 0, "Administrating %s", update_dir);
    return R_PROCESS;
}