cmd/rpcgen/rpc_svcout.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

/*
 * rpc_svcout.c, Server-skeleton outputter for the RPC protocol compiler
 */
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include "rpc_parse.h"
#include "rpc_util.h"

extern int nullproc(proc_list *);

static char RQSTP[] = "rqstp";
static char TRANSP[] = "transp";
static char ARG[] = "argument";
static char RESULT[] = "result";
static char ROUTINE[] = "local";
static char RETVAL[] = "retval";

#define ERRBUFLEN   256

static void internal_proctype(proc_list *);
static void write_real_program(definition *);
static void write_programs(char *);
static void write_program(definition *, char *);
static void printerr(char *, char *);
static void write_svc_aux(int);
static void printif(char *, char *, char *, char *);
static void write_inetmost(char *);
static void print_return(char *);
static void print_pmapunset(char *);
static void print_err_message(const char *, const char *, ...);
static void write_msg_out(void);
static void write_timeout_func(void);
static void write_pm_most(char *, int);
static void write_rpc_svc_fg(char *, char *);
static void open_log_file(char *, char *);

static void
p_xdrfunc(char *rname, char *typename)
{
    if (Cflag) {
        f_print(fout, "\t\t_xdr_%s = (xdrproc_t)\n", rname);
        f_print(fout, "\t\t    xdr_%s;\n", stringfix(typename));
    } else {
        f_print(fout, "\t\t_xdr_%s = xdr_%s;\n",
            rname, stringfix(typename));
    }
}

static void
internal_proctype(proc_list *plist)
{
    f_print(fout, "static ");
    ptype(plist->res_prefix, plist->res_type, 1);
    f_print(fout, "*");
}


static void
write_mtauto(void)
{
    f_print(fout, "\tif (!rpc_control(RPC_SVC_MTMODE_SET, &mode)) {\n");
    print_err_message("\t\t", "unable to set automatic MT mode.");
    f_print(fout, "\t\texit(1);\n\t}\n");
}

/*
 * write most of the service, that is, everything but the registrations.
 */
void
write_most(char *infile, int netflag, int nomain)
{
    if (inetdflag || pmflag) {
        char *var_type;
        var_type = (nomain? "extern" : "static");
        f_print(fout, "%s int _rpcpmstart;", var_type);
        f_print(fout, "\t\t/* Started by a port monitor ? */\n");
        if (!tirpcflag) {
            f_print(fout, "%s int _rpcfdtype;", var_type);
            f_print(fout,
                "\t\t /* Whether Stream or Datagram ? */\n");
        }

        if (timerflag) {
            f_print(fout,
"\n/* States a server can be in wrt request */\n\n");
            f_print(fout, "#define\t_IDLE 0\n");
            f_print(fout, "#define\t_SERVED 1\n\n");
            if (nomain) {
                f_print(fout,
                    "/* LINTED static unused if no main */\n");
            }
            f_print(fout,
                "static int _rpcsvcstate = _IDLE;");
            f_print(fout,
"\t/* Set when a request is serviced */\n");
            f_print(fout, "static int _rpcsvccount = 0;");
            f_print(fout,
"\t\t/* Number of requests being serviced */\n");

            if (mtflag) {
                f_print(fout, "mutex_t _svcstate_lock;");
                f_print(fout,
"\t\t/* lock for _rpcsvcstate, _rpcsvccount */\n");

            }
        }

        write_svc_aux(nomain);
    }
    /* write out dispatcher and stubs */
    write_programs(nomain ? NULL : "static");

    if (nomain)
        return;

    f_print(fout, "\nint\nmain()\n");
    f_print(fout, "{\n");
    if (inetdflag) {
        write_inetmost(infile);
        /* Includes call to write_rpc_svc_fg() */
    } else {
        if (tirpcflag) {
            if (netflag) {
                f_print(fout,
                    "\tregister SVCXPRT *%s;\n", TRANSP);
                f_print(fout,
                    "\tstruct netconfig *nconf = NULL;\n");
            }
            f_print(fout, "\tpid_t pid;\n");
            f_print(fout, "\tint i;\n");
            if (mtauto) {
                f_print(fout,
                    "\tint mode = RPC_SVC_MT_AUTO;\n\n");
                write_mtauto();
            } else
                f_print(fout, "\n");

            if (mtflag & timerflag)
                f_print(fout,
"\tmutex_init(&_svcstate_lock, USYNC_THREAD, NULL);\n");

            write_pm_most(infile, netflag);
            f_print(fout, "\telse {\n");
            write_rpc_svc_fg(infile, "\t\t");
            f_print(fout, "\t}\n");
        } else {
            f_print(fout, "\tregister SVCXPRT *%s;\n", TRANSP);
            f_print(fout, "\n");
            print_pmapunset("\t");
        }
    }

    if (logflag && !inetdflag) {
        open_log_file(infile, "\t");
    }
}

/*
 * write a registration for the given transport
 */
void
write_netid_register(char *transp)
{
    list *l;
    definition *def;
    version_list *vp;
    char *sp;
    char tmpbuf[32];

    sp = "";
    f_print(fout, "\n");
    f_print(fout, "%s\tnconf = getnetconfigent(\"%s\");\n", sp, transp);
    f_print(fout, "%s\tif (nconf == NULL) {\n", sp);
    (void) snprintf(tmpbuf, sizeof (tmpbuf), "%s\t\t", sp);
    print_err_message(tmpbuf, "cannot find %s netid.", transp);
    f_print(fout, "%s\t\texit(1);\n", sp);
    f_print(fout, "%s\t}\n", sp);
    f_print(fout, "%s\t%s = svc_tli_create(RPC_ANYFD, nconf, 0, 0, 0);\n",
        sp, TRANSP);
    f_print(fout, "%s\tif (%s == NULL) {\n", sp, TRANSP);
    print_err_message(tmpbuf, "cannot create %s service.", transp);
    f_print(fout, "%s\t\texit(1);\n", sp);
    f_print(fout, "%s\t}\n", sp);

    for (l = defined; l != NULL; l = l->next) {
        def = (definition *) l->val;
        if (def->def_kind != DEF_PROGRAM) {
            continue;
        }
        for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
            f_print(fout,
                "%s\t(void) rpcb_unset(%s, %s, nconf);\n",
                sp, def->def_name, vp->vers_name);
            f_print(fout,
                "%s\tif (!svc_reg(%s, %s, %s, ",
                sp, TRANSP, def->def_name, vp->vers_name);
            pvname(def->def_name, vp->vers_num);
            f_print(fout, ", nconf)) {\n");
            print_err_message(tmpbuf,
                "unable to register (%s, %s, %s).",
                def->def_name, vp->vers_name, transp);
            f_print(fout, "%s\t\texit(1);\n", sp);
            f_print(fout, "%s\t}\n", sp);
        }
    }
    f_print(fout, "%s\tfreenetconfigent(nconf);\n", sp);
}

/*
 * write a registration for the given transport for TLI
 */
void
write_nettype_register(char *transp)
{
    list *l;
    definition *def;
    version_list *vp;

    for (l = defined; l != NULL; l = l->next) {
        def = (definition *) l->val;
        if (def->def_kind != DEF_PROGRAM) {
            continue;
        }
        for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
            f_print(fout, "\tif (!svc_create(\n");
            f_print(fout, "\t    ");
            pvname(def->def_name, vp->vers_num);
            f_print(fout, ", %s, %s,\n",
                def->def_name, vp->vers_name);
            f_print(fout, "\t    \"%s\")) {\n", transp);
            print_err_message("\t\t",
                "unable to create (%s, %s) for %s.",
                def->def_name, vp->vers_name, transp);
            f_print(fout, "\t\texit(1);\n");
            f_print(fout, "\t}\n");
        }
    }
}

/*
 * write the rest of the service
 */
void
write_rest(void)
{
    f_print(fout, "\n");
    if (inetdflag) {
        f_print(fout, "\tif (%s == (SVCXPRT *)NULL) {\n", TRANSP);
        print_err_message("\t\t", "could not create a handle");
        f_print(fout, "\t\texit(1);\n");
        f_print(fout, "\t}\n");
        if (timerflag) {
            f_print(fout, "\tif (_rpcpmstart) {\n");
            if (mtflag) {
                f_print(fout,
"\t\tif (thr_create(NULL, 0, closedown, NULL, 0, NULL) != 0) {\n");
                print_err_message("\t\t\t",
                    "cannot create closedown thread");
                f_print(fout, "\t\t\texit(1);\n");
                f_print(fout, "\t\t}\n");
                f_print(fout, "\t}\n");
            } else {
                f_print(fout,
                "\t\t(void) signal(SIGALRM, %s closedown);\n",
                    Cflag? "(SIG_PF)":"(void(*)())");
                f_print(fout,
"\t\t(void) alarm(_RPCSVC_CLOSEDOWN/2);\n");
                f_print(fout, "\t}\n");
            }
        }
    }
    f_print(fout, "\tsvc_run();\n");
    print_err_message("\t", "svc_run returned");
    f_print(fout, "\texit(1);\n");
    f_print(fout, "\t/* NOTREACHED */\n");
    f_print(fout, "}\n");
}

static void
write_programs(char *storage)
{
    list *l;
    definition *def;

    /* write out stubs for procedure  definitions */
    for (l = defined; l != NULL; l = l->next) {
        def = (definition *) l->val;
        if (def->def_kind == DEF_PROGRAM)
            write_real_program(def);
    }

    /* write out dispatcher for each program */
    for (l = defined; l != NULL; l = l->next) {
        def = (definition *) l->val;
        if (def->def_kind == DEF_PROGRAM)
            write_program(def, storage);
    }


}

/*
 * write out definition of internal function (e.g. _printmsg_1(...))
 *  which calls server's defintion of actual function (e.g. printmsg_1(...)).
 *  Unpacks single user argument of printmsg_1 to call-by-value format
 *  expected by printmsg_1.
 */
static void
write_real_program(definition *def)
{
    version_list *vp;
    proc_list *proc;
    decl_list *l;

    if (!newstyle)
        return;  /* not needed for old style */
    for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
        for (proc = vp->procs; proc != NULL; proc = proc->next) {
            int oneway = streq(proc->res_type, "oneway");

            f_print(fout, "\n");
            if (proc->arg_num < 2 &&
                streq(proc->args.decls->decl.type, "void")) {
                f_print(fout, "/* ARGSUSED */\n");
            }
            if (!mtflag)
                internal_proctype(proc);
            else
                f_print(fout, "int");
            f_print(fout, "\n_");
            pvname(proc->proc_name, vp->vers_num);
            if (Cflag) {
                f_print(fout, "(\n");
                f_print(fout, "    ");
                /* arg name */
                if (proc->arg_num > 1)
                    /* LINTED variable format */
                    f_print(fout, proc->args.argname);
                else
                    ptype(proc->args.decls->decl.prefix,
                        proc->args.decls->decl.type, 0);
                f_print(fout, " *argp,\n");
                if (mtflag) {
                    f_print(fout, "    ");
                    ptype(proc->res_prefix,
                        proc->res_type, 1);
                    f_print(fout, "*%s,\n", RESULT);
                }
                f_print(fout, "    struct svc_req *%s)\n",
                    RQSTP);

            } else {
                if (mtflag)
                    f_print(fout, "(argp, %s, %s)\n",
                        RESULT, RQSTP);
                else
                    f_print(fout, "(argp, %s)\n", RQSTP);
                /* arg name */
                if (proc->arg_num > 1)
                    f_print(fout, "\t%s *argp;\n",
                        proc->args.argname);
                else {
                    f_print(fout, "\t");
                    ptype(proc->args.decls->decl.prefix,
                        proc->args.decls->decl.type, 0);
                    f_print(fout, " *argp;\n");
                }
                if (mtflag)
                    f_print(fout, "\tvoid *%s;\n", RESULT);
                f_print(fout, "\tstruct svc_req *%s;\n", RQSTP);
            }

            f_print(fout, "{\n");
            f_print(fout, "\treturn (");
            /* for mtflag, arguments are different */
            if (Cflag || mtflag)
                pvname_svc(proc->proc_name, vp->vers_num);
            else
                pvname(proc->proc_name, vp->vers_num);
            f_print(fout, "(");
            if (proc->arg_num < 2) { /* single argument */
                /* only print if non-void */
                if (!streq(proc->args.decls->decl.type, "void"))
                    f_print(fout, "*argp, ");
            } else {
                f_print(fout, "\n");
                for (l = proc->args.decls;  l != NULL;
                    l = l->next)
                    f_print(fout, "\t    argp->%s,\n",
                        l->decl.name);
                f_print(fout, "\t    ");
            }
            if (mtflag && !oneway)
                f_print(fout, "%s, ", RESULT);
            f_print(fout, "%s));\n}\n", RQSTP);
        }
    }
}

static void
write_program(definition *def, char *storage)
{
    version_list *vp;
    proc_list *proc;
    int filled;

    for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
        f_print(fout, "\n");
        if (storage != NULL) {
            f_print(fout, "%s ", storage);
        }
        f_print(fout, "void\n");
        pvname(def->def_name, vp->vers_num);

        if (Cflag) {
            f_print(fout, "(struct svc_req *%s, ", RQSTP);
            f_print(fout, "register SVCXPRT *%s)\n", TRANSP);
        } else {
            f_print(fout, "(%s, %s)\n", RQSTP, TRANSP);
            f_print(fout, " struct svc_req *%s;\n", RQSTP);
            f_print(fout, " register SVCXPRT *%s;\n", TRANSP);
        }

        f_print(fout, "{\n");

        filled = 0;
        f_print(fout, "\tunion {\n");
        for (proc = vp->procs; proc != NULL; proc = proc->next) {
            if (proc->arg_num < 2) { /* single argument */
                if (streq(proc->args.decls->decl.type,
                    "void")) {
                    continue;
                }
                filled = 1;
                f_print(fout, "\t\t");
                ptype(proc->args.decls->decl.prefix,
                    proc->args.decls->decl.type, 0);
                pvname(proc->proc_name, vp->vers_num);
                f_print(fout, "_arg;\n");

            } else {
                filled = 1;
                f_print(fout, "\t\t%s", proc->args.argname);
                f_print(fout, " ");
                pvname(proc->proc_name, vp->vers_num);
                f_print(fout, "_arg;\n");
            }
        }
        if (!filled) {
            f_print(fout, "\t\tint fill;\n");
        }
        f_print(fout, "\t} %s;\n", ARG);

        if (mtflag) {
            filled = 0;
            f_print(fout, "\tunion {\n");
            for (proc = vp->procs; proc != NULL;
                proc = proc->next) {
                if (streq(proc->res_type, "void") ||
                    streq(proc->res_type, "oneway"))
                    continue;
                filled = 1;
                f_print(fout, "\t\t");
                ptype(proc->res_prefix, proc->res_type, 0);
                pvname(proc->proc_name, vp->vers_num);
                f_print(fout, "_res;\n");
            }
            if (!filled)
                f_print(fout, "\t\tint fill;\n");
            f_print(fout, "\t} %s;\n", RESULT);
            f_print(fout, "\tbool_t %s;\n", RETVAL);

        } else
            f_print(fout, "\tchar *%s;\n", RESULT);

        if (Cflag) {
            f_print(fout, "\txdrproc_t _xdr_%s, _xdr_%s;\n",
                ARG, RESULT);
            if (mtflag)
                f_print(fout,
"\tbool_t (*%s)(char *, void *, struct svc_req *);\n",
                    ROUTINE);
            else
                f_print(fout,
"\tchar *(*%s)(char *, struct svc_req *);\n",
                    ROUTINE);
        } else {
            f_print(fout,
                "\tbool_t (*_xdr_%s)(), (*_xdr_%s)();\n",
                ARG, RESULT);
            if (mtflag)
                f_print(fout, "\tbool_t (*%s)();\n", ROUTINE);
            else
                f_print(fout, "\tchar *(*%s)();\n", ROUTINE);
        }
        f_print(fout, "\n");

        if (timerflag) {
            if (mtflag)
                f_print(fout,
"\t(void) mutex_lock(&_svcstate_lock);\n");

            f_print(fout, "\t_rpcsvccount++;\n");
            if (mtflag)
                f_print(fout,
"\t(void) mutex_unlock(&_svcstate_lock);\n");
        }

        f_print(fout, "\tswitch (%s->rq_proc) {\n", RQSTP);
        if (!nullproc(vp->procs)) {
            f_print(fout, "\tcase NULLPROC:\n");
            f_print(fout,
                Cflag ?
"\t\t(void) svc_sendreply(%s,\n\t\t    (xdrproc_t)xdr_void, NULL);\n" :
"\t\t(void) svc_sendreply(%s, xdr_void,\n\t\t\tNULL);\n",
                TRANSP);
            print_return("\t\t");
            f_print(fout, "\n");
        }
        for (proc = vp->procs; proc != NULL; proc = proc->next) {
            f_print(fout, "\tcase %s:\n", proc->proc_name);
            if (proc->arg_num < 2) { /* single argument */
                p_xdrfunc(ARG, proc->args.decls->decl.type);
            } else {
                p_xdrfunc(ARG, proc->args.argname);
            }

            if (streq(proc->res_type, "oneway")) {
                /* One-way call */
                f_print(fout, "\t\t_xdr_%s = NULL;\n", RESULT);
            } else {
                p_xdrfunc(RESULT, proc->res_type);
            }
            if (Cflag) {
                if (mtflag) {
                    f_print(fout,
                        "\t\t%s = (bool_t (*) (char *,  "
                        "void *,  struct svc_req *))",
                        ROUTINE);
                } else {
                    f_print(fout,
                        "\t\t%s = (char *(*)(char *, "
                        "struct svc_req *))",
                        ROUTINE);
                }
            } else {
                if (mtflag) {
                    f_print(fout,
                        "\t\t%s = (bool_t (*)())",
                        ROUTINE);
                } else {
                    f_print(fout, "\t\t%s = (char *(*)())",
                        ROUTINE);
                }
            }

            f_print(fout, "\n\t\t    ");
            if (newstyle) { /* new style: calls internal routine */
                f_print(fout, "_");
            }
            if ((Cflag || mtflag) && !newstyle)
                pvname_svc(proc->proc_name, vp->vers_num);
            else
                pvname(proc->proc_name, vp->vers_num);
            f_print(fout, ";\n");
            f_print(fout, "\t\tbreak;\n\n");
        }
        f_print(fout, "\tdefault:\n");
        printerr("noproc", TRANSP);
        print_return("\t\t");
        f_print(fout, "\t}\n");

        f_print(fout,
            "\t(void) memset((char *)&%s, 0, sizeof (%s));\n",
            ARG, ARG);
        printif("getargs", TRANSP, "(caddr_t)&", ARG);
        printerr("decode", TRANSP);
        print_return("\t\t");
        f_print(fout, "\t}\n");

        if (!mtflag)
            if (Cflag)
                f_print(fout,
                    "\t%s = (*%s)((char *)&%s, %s);\n",
                    RESULT, ROUTINE, ARG, RQSTP);
            else
                f_print(fout, "\t%s = (*%s)(&%s, %s);\n",
                    RESULT, ROUTINE, ARG, RQSTP);
        else
            if (Cflag)
                f_print(fout,
"\t%s = (bool_t)(*%s)((char *)&%s, (void *)&%s, %s);\n",
                    RETVAL, ROUTINE, ARG, RESULT, RQSTP);
            else
                f_print(fout,
"\t%s = (bool_t)(*%s)(&%s, &%s, %s);\n",
                    RETVAL, ROUTINE, ARG, RESULT, RQSTP);


        if (mtflag)
            f_print(fout,
"\tif (_xdr_%s && %s > 0 &&\n"
"\t    !svc_sendreply(%s, _xdr_%s, (char *)&%s)) {\n",
                RESULT, RETVAL, TRANSP, RESULT, RESULT);
        else
            f_print(fout,
"\tif (_xdr_%s && %s != NULL &&\n"
"\t    !svc_sendreply(%s, _xdr_%s, %s)) {\n",
                RESULT, RESULT, TRANSP, RESULT, RESULT);

        printerr("systemerr", TRANSP);
        f_print(fout, "\t}\n");

        printif("freeargs", TRANSP, "(caddr_t)&", ARG);
        print_err_message("\t\t", "unable to free arguments");
        f_print(fout, "\t\texit(1);\n");
        f_print(fout, "\t}\n");
        /* print out free routine */
        if (mtflag) {
            f_print(fout, "\tif (_xdr_%s != NULL) {\n", RESULT);
            f_print(fout, "\t\tif (!");

            pvname(def->def_name, vp->vers_num);
            f_print(fout, "_freeresult(%s, _xdr_%s,\n",
                TRANSP, RESULT);
            f_print(fout, "\t\t    (caddr_t)&%s))\n",
                RESULT);
            print_err_message("\t\t\t", "unable to free results");
            f_print(fout, "\n");
            f_print(fout, "\t}\n");
        };
        print_return("\t");
        f_print(fout, "}\n");
    }
}

static void
printerr(char *err, char *transp)
{
    f_print(fout, "\t\tsvcerr_%s(%s);\n", err, transp);
}

static void
printif(char *proc, char *transp, char *prefix, char *arg)
{
    f_print(fout, "\tif (!svc_%s(%s, _xdr_%s, %s%s)) {\n",
        proc, transp, arg, prefix, arg);
}

int
nullproc(proc_list *proc)
{
    for (; proc != NULL; proc = proc->next) {
        if (streq(proc->proc_num, "0"))
            return (1);
    }
    return (0);
}

static void
write_inetmost(char *infile)
{
    f_print(fout, "\tregister SVCXPRT *%s;\n", TRANSP);
    f_print(fout, "\tint sock;\n");
    f_print(fout, "\tint proto;\n");
    f_print(fout, "\tstruct sockaddr_in saddr;\n");
    f_print(fout, "\tint asize = sizeof (saddr);\n");
    f_print(fout, "\n");
    f_print(fout,
    "\tif (getsockname(0, (struct sockaddr *)&saddr, &asize) == 0) {\n");
    f_print(fout, "\t\tint ssize = sizeof (int);\n\n");
    f_print(fout, "\t\tif (saddr.sin_family != AF_INET)\n");
    f_print(fout, "\t\t\texit(1);\n");
    f_print(fout, "\t\tif (getsockopt(0, SOL_SOCKET, SO_TYPE,\n");
    f_print(fout, "\t\t    (char *)&_rpcfdtype, &ssize) == -1)\n");
    f_print(fout, "\t\t\texit(1);\n");
    f_print(fout, "\t\tsock = 0;\n");
    f_print(fout, "\t\t_rpcpmstart = 1;\n");
    f_print(fout, "\t\tproto = 0;\n");
    open_log_file(infile, "\t\t");
    f_print(fout, "\t} else {\n");
    write_rpc_svc_fg(infile, "\t\t");
    f_print(fout, "\t\tsock = RPC_ANYSOCK;\n");
    print_pmapunset("\t\t");
    f_print(fout, "\t}\n");
}

static void
print_return(char *space)
{
    if (exitnow) {
        f_print(fout, "%sexit(0);\n", space);
        return;
    }
    if (timerflag) {
        if (mtflag) {
            f_print(fout,
                "%s(void) mutex_lock(&_svcstate_lock);\n",
                space);
        }
        f_print(fout, "%s_rpcsvccount--;\n", space);
        f_print(fout, "%s_rpcsvcstate = _SERVED;\n", space);
        if (mtflag) {
            f_print(fout,
                "%s(void) mutex_unlock(&_svcstate_lock);\n",
                space);
        }
    }
    f_print(fout, "%sreturn; /* CSTYLED */\n", space);
}

static void
print_pmapunset(char *space)
{
    list *l;
    definition *def;
    version_list *vp;

    for (l = defined; l != NULL; l = l->next) {
        def = (definition *)l->val;
        if (def->def_kind == DEF_PROGRAM) {
            for (vp = def->def.pr.versions; vp != NULL;
                vp = vp->next) {
                f_print(fout, "%s(void) pmap_unset(%s, %s);\n",
                    space, def->def_name, vp->vers_name);
            }
        }
    }
}

static void
print_err_message(const char *space, const char *fmt, ...)
{
    char errbuf[ERRBUFLEN];
    va_list va;

    va_start(va, fmt);
    (void) vsnprintf(errbuf, sizeof (errbuf), fmt, va);
    va_end(va);

    if (logflag)
        f_print(fout, "%ssyslog(LOG_ERR, \"%%s\",\n", space);
    else if (inetdflag || pmflag)
        f_print(fout, "%sRPC_MSGOUT(\"%%s\",\n", space);
    else
        f_print(fout, "%sfprintf(stderr, \"%%s\",\n", space);
    f_print(fout, "%s    \"%s\");\n", space, errbuf);
}

/*
 * Write the server auxiliary function (RPC_MSGOUT, timeout)
 */
static void
write_svc_aux(int nomain)
{
    if (!logflag)
        write_msg_out();
    if (!nomain)
        write_timeout_func();
}

/*
 * Write the RPC_MSGOUT function
 *
 * Note that while we define RPC_MSGOUT to be printf-like, all existing
 * calls are of the form "%s","<msg>" and this implementation assumes that
 * trivial case.  If in the future it's desirable to generate richer calls
 * this implementation can change to match.  This way we don't (yet) have
 * to introduce varargs into the generated code.
 */
static void
write_msg_out(void)
{
    f_print(fout, "\n");
    f_print(fout, "#if\tdefined(RPC_MSGOUT)\n");
    if (!Cflag) {
        f_print(fout, "extern void RPC_MSGOUT();\n");
    } else {
        f_print(fout, "extern void RPC_MSGOUT(const char *, ...);\n");
    }
    f_print(fout, "#else\t/* defined(RPC_MSGOUT) */\n");
    f_print(fout, "static ");
    if (!Cflag) {
        f_print(fout, "void\nRPC_MSGOUT(fmt, msg)\n");
        f_print(fout, "\tchar *fmt;\n");
        f_print(fout, "\tchar *msg;\n");
    } else {
        f_print(fout, "void\nRPC_MSGOUT(const char *fmt, char *msg)\n");
    }
    f_print(fout, "{\n");
    f_print(fout, "#ifdef RPC_SVC_FG\n");
    if (inetdflag || pmflag)
        f_print(fout, "\tif (_rpcpmstart)\n");
    f_print(fout, "\t\tsyslog(LOG_ERR, fmt, msg);\n");
    f_print(fout, "\telse {\n");
    f_print(fout, "\t\t(void) fprintf(stderr, fmt, msg);\n");
    f_print(fout, "\t\t(void) putc('\\n', stderr);\n");
    f_print(fout, "\t}\n");
    f_print(fout, "#else\n");
    f_print(fout, "\tsyslog(LOG_ERR, fmt, msg);\n");
    f_print(fout, "#endif\n");
    f_print(fout, "}\n");
    f_print(fout, "#endif\t/* defined(RPC_MSGOUT) */\n");
}

/*
 * Write the timeout function
 */
static void
write_timeout_func(void)
{
    if (!timerflag)
        return;

    f_print(fout, "\n");
    if (mtflag) {
        f_print(fout, "/*ARGSUSED*/\n");
        f_print(fout, "static void *\n");
        if (!Cflag) {
            f_print(fout, "closedown(arg)\n");
            f_print(fout, "\tvoid *arg;\n");
        } else
            f_print(fout, "closedown(void *arg)\n");
        f_print(fout, "{\n");
        f_print(fout, "\t/*CONSTCOND*/\n");
        f_print(fout, "\twhile (1) {\n");
        f_print(fout, "\t\t(void) sleep(_RPCSVC_CLOSEDOWN/2);\n\n");
        f_print(fout,
"\t\tif (mutex_trylock(&_svcstate_lock) != 0)\n");
        f_print(fout, "\t\t\tcontinue;\n\n");
        f_print(fout,
"\t\tif (_rpcsvcstate == _IDLE && _rpcsvccount == 0) {\n");
        if (tirpcflag) {
            f_print(fout, "\t\t\tint size;\n");
        } else {
            f_print(fout, "\t\t\textern fd_set svc_fdset;\n");
            f_print(fout, "\t\t\tstatic int size;\n");
        }
        f_print(fout, "\t\t\tint i, openfd = 0;\n\n");
        if (tirpcflag) {
            f_print(fout, "\t\t\tsize = svc_max_pollfd;\n");
        } else {
            f_print(fout, "\t\t\tif (size == 0) {\n");
            f_print(fout, "\t\t\t\tsize = getdtablesize();\n");
            f_print(fout, "\t\t\t}\n");
        }
        f_print(fout,
"\t\t\tfor (i = 0; i < size && openfd < 2; i++)\n");
        if (tirpcflag) {
            f_print(fout, "\t\t\t\tif (svc_pollfd[i].fd >= 0)\n");
        } else {
            f_print(fout, "\t\t\t\tif (FD_ISSET(i, &svc_fdset))\n");
        }
        f_print(fout, "\t\t\t\t\topenfd++;\n");
        f_print(fout, "\t\t\tif (openfd <= 1)\n");
        f_print(fout, "\t\t\t\texit(0);\n");
        f_print(fout, "\t\t} else\n");
        f_print(fout, "\t\t\t_rpcsvcstate = _IDLE;\n\n");
        f_print(fout, "\t\t(void) mutex_unlock(&_svcstate_lock);\n");
        f_print(fout, "\t}\n");
        f_print(fout, "}\n");
        return;
    }

    f_print(fout, "static void\n");
    if (!Cflag) {
        f_print(fout, "closedown(sig)\n");
        f_print(fout, "\tint sig;\n");
    } else
        f_print(fout, "closedown(int sig)\n");
    f_print(fout, "{\n");
    f_print(fout, "\tif (_rpcsvcstate == _IDLE && _rpcsvccount == 0) {\n");
    if (tirpcflag) {
        f_print(fout, "\t\tint size;\n");
    } else {
        f_print(fout, "\t\textern fd_set svc_fdset;\n");
        f_print(fout, "\t\tstatic int size;\n");
    }
    f_print(fout, "\t\tint i, openfd = 0;\n\n");
    if (tirpcflag) {
        f_print(fout, "\t\tsize = svc_max_pollfd;\n");
    } else {
        f_print(fout, "\t\tif (size == 0) {\n");
        f_print(fout, "\t\t\tsize = getdtablesize();\n");
        f_print(fout, "\t\t}\n");
    }
    f_print(fout,
        "\t\tfor (i = 0; i < size && openfd < 2; i++)\n");
    if (tirpcflag) {
        f_print(fout, "\t\t\tif (svc_pollfd[i].fd >= 0)\n");
    } else {
        f_print(fout, "\t\t\tif (FD_ISSET(i, &svc_fdset))\n");
    }
    f_print(fout, "\t\t\t\topenfd++;\n");
    f_print(fout, "\t\tif (openfd <= 1)\n");
    f_print(fout, "\t\t\texit(0);\n");
    f_print(fout, "\t} else\n");
    f_print(fout, "\t\t_rpcsvcstate = _IDLE;\n\n");

    f_print(fout, "\t(void) signal(SIGALRM, %s closedown);\n",
        Cflag? "(SIG_PF)" : "(void(*)())");
    f_print(fout, "\t(void) alarm(_RPCSVC_CLOSEDOWN/2);\n");
    f_print(fout, "}\n");
}

/*
 * Write the most of port monitor support
 */
static void
write_pm_most(char *infile, int netflag)
{
    list *l;
    definition *def;
    version_list *vp;

    f_print(fout, "\t(void) sigset(SIGPIPE, SIG_IGN);\n\n");
    f_print(fout, "\t/*\n");
    f_print(fout, "\t * If stdin looks like a TLI endpoint, we assume\n");
    f_print(fout, "\t * that we were started by a port monitor. If\n");
    f_print(fout, "\t * t_getstate fails with TBADF, this is not a\n");
    f_print(fout, "\t * TLI endpoint.\n");
    f_print(fout, "\t */\n");
    f_print(fout, "\tif (t_getstate(0) != -1 || t_errno != TBADF) {\n");
    f_print(fout, "\t\tchar *netid;\n");
    if (!netflag) { /* Not included by -n option */
        f_print(fout, "\t\tstruct netconfig *nconf = NULL;\n");
        f_print(fout, "\t\tSVCXPRT *%s;\n", TRANSP);
    }
    if (timerflag)
        f_print(fout, "\t\tint pmclose;\n");
/*
 *  Not necessary, defined in /usr/include/stdlib
 *  f_print(fout, "\t\textern char *getenv();\n");
 */
    f_print(fout, "\n");
    f_print(fout, "\t\t_rpcpmstart = 1;\n");
    open_log_file(infile, "\t\t");
    f_print(fout,
"\n\t\tif ((netid = getenv(\"NLSPROVIDER\")) == NULL) {\n");

    if (timerflag) {
        f_print(fout, "\t\t/* started from inetd */\n");
        f_print(fout, "\t\t\tpmclose = 1;\n");
    }
    f_print(fout, "\t\t} else {\n");
    f_print(fout, "\t\t\tif ((nconf = getnetconfigent(netid)) == NULL)\n");
    print_err_message("\t\t\t\t", "cannot get transport info");
    if (timerflag)
        f_print(fout,
            "\n\t\t\tpmclose = (t_getstate(0) != T_DATAXFER);\n");
    f_print(fout, "\t\t}\n");
    f_print(fout,
"\t\tif ((%s = svc_tli_create(0, nconf, NULL, 0, 0)) == NULL) {\n",
        TRANSP);
    print_err_message("\t\t\t", "cannot create server handle");
    f_print(fout, "\t\t\texit(1);\n");
    f_print(fout, "\t\t}\n");
    f_print(fout, "\t\tif (nconf)\n");
    f_print(fout, "\t\t\tfreenetconfigent(nconf);\n");
    for (l = defined; l != NULL; l = l->next) {
        def = (definition *) l->val;
        if (def->def_kind != DEF_PROGRAM) {
            continue;
        }
        for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
            f_print(fout,
                "\t\tif (!svc_reg(%s, %s, %s,\n",
                TRANSP, def->def_name, vp->vers_name);
            f_print(fout, "\t\t    ");
            pvname(def->def_name, vp->vers_num);
            f_print(fout, ", 0)) {\n");
            print_err_message("\t\t\t",
                "unable to register (%s, %s).",
                def->def_name, vp->vers_name);
            f_print(fout, "\t\t\texit(1);\n");
            f_print(fout, "\t\t}\n");
        }
    }
    if (timerflag) {
        f_print(fout, "\t\tif (pmclose) {\n");
        if (mtflag) {
            f_print(fout,
"\t\t\tif (thr_create(NULL, 0, closedown, NULL,\n\t\t\t    0, NULL) != 0) {\n");
            print_err_message("\t\t\t\t",
                "cannot create closedown thread");
            f_print(fout, "\t\t\t\texit(1);\n");
            f_print(fout, "\t\t\t}\n");
        } else {
            f_print(fout,
"\t\t\t(void) signal(SIGALRM, %s closedown);\n",
                Cflag? "(SIG_PF)" : "(void(*)())");
            f_print(fout,
"\t\t\t(void) alarm(_RPCSVC_CLOSEDOWN/2);\n");
        }
        f_print(fout, "\t\t}\n");
    }
    f_print(fout, "\t\tsvc_run();\n");
    f_print(fout, "\t\texit(1);\n");
    f_print(fout, "\t\t/* NOTREACHED */\n");
    f_print(fout, "\t}");
}

/*
 * Support for backgrounding the server if self started.
 */
static void
write_rpc_svc_fg(char *infile, char *sp)
{
    f_print(fout, "#ifndef RPC_SVC_FG\n");
    f_print(fout, "#pragma weak closefrom\n");
    f_print(fout, "%sextern void closefrom();\n", sp);
    f_print(fout, "%sint size;\n", sp);
    if (tirpcflag)
        f_print(fout, "%sstruct rlimit rl;\n", sp);
    if (inetdflag)
        f_print(fout, "%sint pid, i;\n\n", sp);
    f_print(fout, "%spid = fork();\n", sp);
    f_print(fout, "%sif (pid < 0) {\n", sp);
    f_print(fout, "%s\tperror(\"cannot fork\");\n", sp);
    f_print(fout, "%s\texit(1);\n", sp);
    f_print(fout, "%s}\n", sp);
    f_print(fout, "%sif (pid)\n", sp);
    f_print(fout, "%s\texit(0);\n", sp);
    /* close all file descriptors */
    if (tirpcflag) {
        f_print(fout, "%sif (closefrom != NULL)\n", sp);
        f_print(fout, "%s\tclosefrom(0);\n", sp);
        f_print(fout, "%selse {\n", sp);
        f_print(fout, "%s\trl.rlim_max = 0;\n", sp);
        f_print(fout, "%s\tgetrlimit(RLIMIT_NOFILE, &rl);\n", sp);
        f_print(fout, "%s\tif ((size = rl.rlim_max) == 0)\n", sp);
        f_print(fout, "%s\t\texit(1);\n", sp);
        f_print(fout, "%s\tfor (i = 0; i < size; i++)\n", sp);
        f_print(fout, "%s\t\t(void) close(i);\n", sp);
        f_print(fout, "%s}\n", sp);
    } else {
        f_print(fout, "%s\tsize = getdtablesize();\n", sp);
        f_print(fout, "%s\tfor (i = 0; i < size; i++)\n", sp);
        f_print(fout, "%s\t\t(void) close(i);\n", sp);
    }
    /* Redirect stderr and stdout to /dev/null */
    f_print(fout, "%si = open(\"/dev/null\", 2);\n", sp);
    f_print(fout, "%s(void) dup2(i, 1);\n", sp);
    f_print(fout, "%s(void) dup2(i, 2);\n", sp);
    /* This removes control of the controlling terminal */
    if (tirpcflag)
        f_print(fout, "%ssetsid();\n", sp);
    else {
        f_print(fout, "%si = open(\"/dev/tty\", 2);\n", sp);
        f_print(fout, "%sif (i >= 0) {\n", sp);
        f_print(fout,
            "%s\t(void) ioctl(i, TIOCNOTTY, (char *)NULL);\n", sp);
        f_print(fout, "%s\t(void) close(i);\n", sp);
        f_print(fout, "%s}\n", sp);
    }
    if (!logflag)
        open_log_file(infile, sp);
    f_print(fout, "#endif\n");
    if (logflag)
        open_log_file(infile, sp);
}

static void
open_log_file(char *infile, char *sp)
{
    char *s;

    s = strrchr(infile, '.');
    if (s)
        *s = '\0';
    f_print(fout, "%sopenlog(\"%s\", LOG_PID, LOG_DAEMON);\n", sp, infile);
    if (s)
        *s = '.';
}

/*
 * write a registration for the given transport for Inetd
 */
void
write_inetd_register(char *transp)
{
    list *l;
    definition *def;
    version_list *vp;
    char *sp;
    int isudp;
    char tmpbuf[32];

    if (inetdflag)
        sp = "\t";
    else
        sp = "";
    if (streq(transp, "udp"))
        isudp = 1;
    else
        isudp = 0;
    f_print(fout, "\n");
    if (inetdflag) {
        f_print(fout,
            "\tif ((_rpcfdtype == 0) || (_rpcfdtype == %s)) {\n",
            isudp ? "SOCK_DGRAM" : "SOCK_STREAM");
    }
    f_print(fout, "%s\t%s = svc%s_create(%s",
        sp, TRANSP, transp, inetdflag? "sock": "RPC_ANYSOCK");
    if (!isudp)
        f_print(fout, ", 0, 0");
    f_print(fout, ");\n");
    f_print(fout, "%s\tif (%s == NULL) {\n", sp, TRANSP);
    (void) snprintf(tmpbuf, sizeof (tmpbuf), "%s\t\t", sp);
    print_err_message(tmpbuf, "cannot create %s service.", transp);
    f_print(fout, "%s\t\texit(1);\n", sp);
    f_print(fout, "%s\t}\n", sp);

    if (inetdflag) {
        f_print(fout, "%s\tif (!_rpcpmstart)\n\t", sp);
        f_print(fout, "%s\tproto = IPPROTO_%s;\n",
            sp, isudp ? "UDP": "TCP");
    }
    for (l = defined; l != NULL; l = l->next) {
        def = (definition *) l->val;
        if (def->def_kind != DEF_PROGRAM)
            continue;
        for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
            f_print(fout, "%s\tif (!svc_register(%s, %s, %s,\n",
                sp, TRANSP, def->def_name, vp->vers_name);
            f_print(fout, "%s\t    ", sp);
            pvname(def->def_name, vp->vers_num);
            if (inetdflag)
                f_print(fout, ", proto)) {\n");
            else
                f_print(fout, ", IPPROTO_%s)) {\n",
                    isudp ? "UDP": "TCP");
            print_err_message(tmpbuf,
                "unable to register (%s, %s, %s).",
                def->def_name, vp->vers_name, transp);
            f_print(fout, "%s\t\texit(1);\n", sp);
            f_print(fout, "%s\t}\n", sp);
        }
    }
    if (inetdflag)
        f_print(fout, "\t}\n");
}