494 lines
12 KiB
C
494 lines
12 KiB
C
#ifndef lint
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static char sccsid[] = "@(#)rpc_svcout.c 1.1 94/10/31 (C) 1987 SMI";
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#endif
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/*
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* rpc_svcout.c, Server-skeleton outputter for the RPC protocol compiler
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* Copyright (C) 1987, Sun Microsytsems, Inc.
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*/
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#include <stdio.h>
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#include <strings.h>
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#include "rpc_parse.h"
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#include "rpc_util.h"
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static char RQSTP[] = "rqstp";
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static char TRANSP[] = "transp";
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static char ARG[] = "argument";
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static char RESULT[] = "result";
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static char ROUTINE[] = "local";
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char _errbuf[256]; /* For all messages */
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/*
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* write most of the service, that is, everything but the registrations.
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*/
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void
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write_most(infile)
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char *infile; /* our name */
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{
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list *l;
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definition *def;
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version_list *vp;
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for (l = defined; l != NULL; l = l->next) {
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def = (definition *) l->val;
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if (def->def_kind == DEF_PROGRAM) {
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for (vp = def->def.pr.versions; vp != NULL;
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vp = vp->next) {
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f_print(fout, "\nstatic void ");
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pvname(def->def_name, vp->vers_num);
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f_print(fout, "();");
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}
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}
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}
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if (timerflag)
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f_print(fout, "\nstatic void closedown();");
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f_print(fout, "\n");
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if (inetdflag) {
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f_print(fout, "\nstatic int _rpcpmstart;");
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f_print(fout, "\t\t/* Started by a port monitor ? */\n");
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f_print(fout, "static int _rpcfdtype;");
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f_print(fout, "\t\t/* Whether Stream or Datagram ? */\n");
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if (timerflag) {
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f_print(fout, "static int _rpcsvcdirty;");
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f_print(fout, "\t/* Still serving ? */\n");
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}
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}
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f_print(fout, "\nmain()\n");
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f_print(fout, "{\n");
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f_print(fout, "\tregister SVCXPRT *%s;\n", TRANSP);
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if (inetdflag) {
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write_inetmost(infile); /* Includes call to write_rpc_svc_fg() */
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} else {
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f_print(fout, "\n");
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print_pmapunset("\t");
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}
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if (logflag && !inetdflag) {
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open_log_file(infile, "\t");
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}
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}
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/*
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* write a registration for the given transport for Inetd
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*/
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void
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write_register(transp)
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char *transp;
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{
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list *l;
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definition *def;
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version_list *vp;
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char *sp;
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int isudp;
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char tmpbuf[32];
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if (inetdflag)
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sp = "\t";
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else
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sp = "";
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if (streq(transp, "udp"))
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isudp = 1;
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else
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isudp = 0;
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f_print(fout, "\n");
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if (inetdflag) {
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f_print(fout, "\tif ((_rpcfdtype == 0) || (_rpcfdtype == %s)) {\n",
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isudp ? "SOCK_DGRAM" : "SOCK_STREAM");
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}
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f_print(fout, "%s\t%s = svc%s_create(%s",
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sp, TRANSP, transp, inetdflag? "sock": "RPC_ANYSOCK");
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if (!isudp)
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f_print(fout, ", 0, 0");
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f_print(fout, ");\n");
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f_print(fout, "%s\tif (%s == NULL) {\n", sp, TRANSP);
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(void) sprintf(_errbuf, "cannot create %s service.", transp);
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(void) sprintf(tmpbuf, "%s\t\t", sp);
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print_err_message(tmpbuf);
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f_print(fout, "%s\t\texit(1);\n", sp);
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f_print(fout, "%s\t}\n", sp);
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if (inetdflag) {
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f_print(fout, "%s\tif (!_rpcpmstart)\n\t", sp);
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f_print(fout, "%s\tproto = IPPROTO_%s;\n",
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sp, isudp ? "UDP": "TCP");
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}
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for (l = defined; l != NULL; l = l->next) {
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def = (definition *) l->val;
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if (def->def_kind != DEF_PROGRAM) {
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continue;
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}
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for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
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f_print(fout, "%s\tif (!svc_register(%s, %s, %s, ",
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sp, TRANSP, def->def_name, vp->vers_name);
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pvname(def->def_name, vp->vers_num);
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if (inetdflag)
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f_print(fout, ", proto)) {\n");
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else
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f_print(fout, ", IPPROTO_%s)) {\n",
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isudp ? "UDP": "TCP");
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(void) sprintf(_errbuf, "unable to register (%s, %s, %s).",
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def->def_name, vp->vers_name, transp);
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print_err_message(tmpbuf);
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f_print(fout, "%s\t\texit(1);\n", sp);
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f_print(fout, "%s\t}\n", sp);
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}
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}
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if (inetdflag)
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f_print(fout, "\t}\n");
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}
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/*
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* write the rest of the service
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*/
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void
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write_rest()
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{
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f_print(fout, "\n");
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if (inetdflag) {
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f_print(fout, "\tif (%s == (SVCXPRT *)NULL) {\n", TRANSP);
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(void) sprintf(_errbuf, "could not create a handle");
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print_err_message("\t\t");
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f_print(fout, "\t\texit(1);\n");
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f_print(fout, "\t}\n");
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if (timerflag) {
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f_print(fout, "\tif (_rpcpmstart) {\n");
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f_print(fout, "\t\t(void) signal(SIGALRM, closedown);\n");
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f_print(fout, "\t\t(void) alarm(_RPCSVC_CLOSEDOWN);\n");
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f_print(fout, "\t}\n");
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}
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}
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f_print(fout, "\tsvc_run();\n");
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(void) sprintf(_errbuf, "svc_run returned");
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print_err_message("\t");
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f_print(fout, "\texit(1);\n");
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f_print(fout, "\t/* NOTREACHED */\n");
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f_print(fout, "}\n");
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}
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void
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write_programs(storage)
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char *storage;
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{
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list *l;
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definition *def;
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for (l = defined; l != NULL; l = l->next) {
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def = (definition *) l->val;
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if (def->def_kind == DEF_PROGRAM) {
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write_program(def, storage);
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}
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}
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}
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static
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write_program(def, storage)
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definition *def;
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char *storage;
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{
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version_list *vp;
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proc_list *proc;
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int filled;
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for (vp = def->def.pr.versions; vp != NULL; vp = vp->next) {
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f_print(fout, "\n");
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if (storage != NULL) {
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f_print(fout, "%s ", storage);
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}
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f_print(fout, "void\n");
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pvname(def->def_name, vp->vers_num);
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f_print(fout, "(%s, %s)\n", RQSTP, TRANSP);
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f_print(fout, " struct svc_req *%s;\n", RQSTP);
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f_print(fout, " register SVCXPRT *%s;\n", TRANSP);
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f_print(fout, "{\n");
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filled = 0;
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f_print(fout, "\tunion {\n");
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for (proc = vp->procs; proc != NULL; proc = proc->next) {
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if (streq(proc->arg_type, "void")) {
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continue;
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}
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filled = 1;
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f_print(fout, "\t\t");
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ptype(proc->arg_prefix, proc->arg_type, 0);
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pvname(proc->proc_name, vp->vers_num);
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f_print(fout, "_arg;\n");
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}
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if (!filled) {
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f_print(fout, "\t\tint fill;\n");
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}
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f_print(fout, "\t} %s;\n", ARG);
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f_print(fout, "\tchar *%s;\n", RESULT);
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f_print(fout, "\tbool_t (*xdr_%s)(), (*xdr_%s)();\n", ARG, RESULT);
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f_print(fout, "\tchar *(*%s)();\n", ROUTINE);
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f_print(fout, "\n");
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if (timerflag)
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f_print(fout, "\t_rpcsvcdirty = 1;\n");
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f_print(fout, "\tswitch (%s->rq_proc) {\n", RQSTP);
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if (!nullproc(vp->procs)) {
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f_print(fout, "\tcase NULLPROC:\n");
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f_print(fout,
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"\t\t(void) svc_sendreply(%s, xdr_void, (char *)NULL);\n",
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TRANSP);
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print_return("\t\t");
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f_print(fout, "\n");
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}
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for (proc = vp->procs; proc != NULL; proc = proc->next) {
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f_print(fout, "\tcase %s:\n", proc->proc_name);
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f_print(fout, "\t\txdr_%s = xdr_%s;\n", ARG,
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stringfix(proc->arg_type));
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f_print(fout, "\t\txdr_%s = xdr_%s;\n", RESULT,
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stringfix(proc->res_type));
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f_print(fout, "\t\t%s = (char *(*)()) ", ROUTINE);
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pvname(proc->proc_name, vp->vers_num);
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f_print(fout, ";\n");
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f_print(fout, "\t\tbreak;\n\n");
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}
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f_print(fout, "\tdefault:\n");
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printerr("noproc", TRANSP);
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print_return("\t\t");
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f_print(fout, "\t}\n");
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f_print(fout, "\tbzero((char *)&%s, sizeof(%s));\n", ARG, ARG);
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printif("getargs", TRANSP, "&", ARG);
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printerr("decode", TRANSP);
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print_return("\t\t");
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f_print(fout, "\t}\n");
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f_print(fout, "\t%s = (*%s)(&%s, %s);\n", RESULT, ROUTINE,
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ARG, RQSTP);
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f_print(fout,
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"\tif (%s != NULL && !svc_sendreply(%s, xdr_%s, %s)) {\n",
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RESULT, TRANSP, RESULT, RESULT);
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printerr("systemerr", TRANSP);
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f_print(fout, "\t}\n");
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printif("freeargs", TRANSP, "&", ARG);
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(void) sprintf(_errbuf, "unable to free arguments");
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print_err_message("\t\t");
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f_print(fout, "\t\texit(1);\n");
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f_print(fout, "\t}\n");
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print_return("\t");
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f_print(fout, "}\n");
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}
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}
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static
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printerr(err, transp)
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char *err;
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char *transp;
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{
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f_print(fout, "\t\tsvcerr_%s(%s);\n", err, transp);
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}
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static
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printif(proc, transp, prefix, arg)
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char *proc;
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char *transp;
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char *prefix;
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char *arg;
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{
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f_print(fout, "\tif (!svc_%s(%s, xdr_%s, %s%s)) {\n",
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proc, transp, arg, prefix, arg);
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}
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nullproc(proc)
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proc_list *proc;
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{
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for (; proc != NULL; proc = proc->next) {
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if (streq(proc->proc_num, "0")) {
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return (1);
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}
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}
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return (0);
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}
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static
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write_inetmost(infile)
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char *infile;
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{
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f_print(fout, "\tint sock;\n");
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f_print(fout, "\tint proto;\n");
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f_print(fout, "\tstruct sockaddr_in saddr;\n");
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f_print(fout, "\tint asize = sizeof(saddr);\n");
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f_print(fout, "\n");
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f_print(fout,
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"\tif (getsockname(0, (struct sockaddr *)&saddr, &asize) == 0) {\n");
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f_print(fout, "\t\tint ssize = sizeof(int);\n\n");
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f_print(fout, "\t\tif (saddr.sin_family != AF_INET)\n");
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f_print(fout, "\t\t\texit(1);\n");
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f_print(fout, "\t\tif (getsockopt(0, SOL_SOCKET, SO_TYPE,\n");
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f_print(fout, "\t\t\t\t(char *)&_rpcfdtype, &ssize) == -1)\n");
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f_print(fout, "\t\t\texit(1);\n");
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f_print(fout, "\t\tsock = 0;\n");
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f_print(fout, "\t\t_rpcpmstart = 1;\n");
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f_print(fout, "\t\tproto = 0;\n");
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open_log_file(infile, "\t\t");
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f_print(fout, "\t} else {\n");
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write_rpc_svc_fg(infile, "\t\t");
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f_print(fout, "\t\tsock = RPC_ANYSOCK;\n");
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print_pmapunset("\t\t");
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f_print(fout, "\t}\n");
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}
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static
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print_return(space)
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char *space;
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{
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if (exitnow)
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f_print(fout, "%sexit(0);\n", space);
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else {
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if (timerflag)
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f_print(fout, "%s_rpcsvcdirty = 0;\n", space);
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f_print(fout, "%sreturn;\n", space);
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}
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}
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static
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print_pmapunset(space)
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char *space;
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{
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list *l;
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definition *def;
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version_list *vp;
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for (l = defined; l != NULL; l = l->next) {
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def = (definition *) l->val;
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if (def->def_kind == DEF_PROGRAM) {
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for (vp = def->def.pr.versions; vp != NULL;
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vp = vp->next) {
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f_print(fout, "%s(void) pmap_unset(%s, %s);\n",
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space, def->def_name, vp->vers_name);
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}
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}
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}
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}
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static
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print_err_message(space)
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char *space;
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{
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if (logflag)
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f_print(fout, "%ssyslog(LOG_ERR, \"%s\");\n", space, _errbuf);
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else if (inetdflag)
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f_print(fout, "%s_msgout(\"%s\");\n", space, _errbuf);
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else
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f_print(fout, "%sfprintf(stderr, \"%s\");\n", space, _errbuf);
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}
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/*
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* Write the server auxiliary function ( _msgout, timeout)
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*/
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void
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write_svc_aux()
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{
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if (!logflag)
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write_msg_out();
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write_timeout_func();
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}
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/*
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* Write the _msgout function
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*/
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static
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write_msg_out()
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{
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f_print(fout, "\n");
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f_print(fout, "static\n");
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f_print(fout, "_msgout(msg)\n");
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f_print(fout, "\tchar *msg;\n");
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f_print(fout, "{\n");
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f_print(fout, "#ifdef RPC_SVC_FG\n");
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f_print(fout, "\tif (_rpcpmstart)\n");
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f_print(fout, "\t\tsyslog(LOG_ERR, msg);\n");
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f_print(fout, "\telse\n");
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f_print(fout, "\t\t(void) fprintf(stderr, \"%%s\\n\", msg);\n");
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f_print(fout, "#else\n");
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f_print(fout, "\tsyslog(LOG_ERR, msg);\n");
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f_print(fout, "#endif\n");
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f_print(fout, "}\n");
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}
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/*
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* Write the timeout function
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*/
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static
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write_timeout_func()
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{
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if (!timerflag)
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return;
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f_print(fout, "\n");
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f_print(fout, "static void\n");
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f_print(fout, "closedown()\n");
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f_print(fout, "{\n");
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f_print(fout, "\tif (_rpcsvcdirty == 0) {\n");
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f_print(fout, "\t\textern fd_set svc_fdset;\n");
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f_print(fout, "\t\tstatic int size;\n");
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f_print(fout, "\t\tint i, openfd;\n");
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f_print(fout, "\n");
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f_print(fout, "\t\tif (_rpcfdtype == SOCK_DGRAM)\n");
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f_print(fout, "\t\t\texit(0);\n");
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f_print(fout, "\t\tif (size == 0)\n");
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f_print(fout, "\t\t\tsize = getdtablesize();\n");
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f_print(fout,
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"\t\tfor (i = 0, openfd = 0; i < size && openfd < 2; i++)\n");
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f_print(fout, "\t\t\tif (FD_ISSET(i, &svc_fdset))\n");
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f_print(fout, "\t\t\t\topenfd++;\n");
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f_print(fout, "\t\tif (openfd <= 1)\n");
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f_print(fout, "\t\t\texit(0);\n");
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f_print(fout, "\t}\n");
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f_print(fout, "\t(void) alarm(_RPCSVC_CLOSEDOWN);\n");
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f_print(fout, "}\n");
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}
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/*
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* Support for backgrounding the server if self started.
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*/
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static
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write_rpc_svc_fg(infile, sp)
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char *infile;
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char *sp;
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{
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f_print(fout, "#ifndef RPC_SVC_FG\n");
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f_print(fout, "%sint i, pid;\n\n", sp);
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f_print(fout, "%spid = fork();\n", sp);
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f_print(fout, "%sif (pid < 0) {\n", sp);
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f_print(fout, "%s\tperror(\"cannot fork\");\n", sp);
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f_print(fout, "%s\texit(1);\n", sp);
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f_print(fout, "%s}\n", sp);
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f_print(fout, "%sif (pid)\n", sp);
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|
f_print(fout, "%s\texit(0);\n", sp);
|
|
f_print(fout, "%sfor (i = 0 ; i < 20; i++)\n", sp);
|
|
f_print(fout, "%s\t(void) close(i);\n", sp);
|
|
f_print(fout, "%si = open(\"/dev/console\", 2);\n", sp);
|
|
f_print(fout, "%s(void) dup2(i, 1);\n", sp);
|
|
f_print(fout, "%s(void) dup2(i, 2);\n", sp);
|
|
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
|
|
open_log_file(infile, sp)
|
|
char *infile;
|
|
char *sp;
|
|
{
|
|
char *s;
|
|
|
|
s = rindex(infile, '.');
|
|
if (s)
|
|
*s = '\0';
|
|
f_print(fout,"%sopenlog(\"%s\", LOG_PID, LOG_DAEMON);\n", sp, infile);
|
|
if (s)
|
|
*s = '.';
|
|
}
|