xref: /illumos-gate/usr/src/cmd/rpcgen/rpc_main.c (revision 8cd45542f2a452ca0dab13d8b2d5cfa876ccbebc)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2005 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.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*
 * rpc_main.c, Top level of the RPC protocol compiler.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/file.h>
#include <sys/stat.h>
#include "rpc_parse.h"
#include "rpc_util.h"
#include "rpc_scan.h"


extern void write_sample_svc(definition *);
extern int write_sample_clnt(definition *);
extern void write_sample_clnt_main(void);
extern void reinitialize(void);
extern void crash(void);
extern void add_type(int, char *);
extern void add_sample_msg(void);

static void svc_output(char *, char *, int, char *);
static void clnt_output(char *, char *, int, char *);
static void c_output(char *, char *, int, char *);
static void mkfile_output(struct commandline *);
static void c_initialize(void);
static void h_output(char *, char *, int, char *);
static void s_output(int, char *[], char *, char *, int, char *, int, int);
static void l_output(char *, char *, int, char *);
static void t_output(char *, char *, int, char *);
static int do_registers(int, char *[]);
static uint_t parseargs(int, char *[], struct commandline *);
static void usage(void);
static void version_info(void);
static void options_usage(void);

#define	EXTEND		1		/* alias for TRUE */
#define	DONT_EXTEND	0		/* alias for FALSE */

#define	SUNOS_CPP "/usr/lib/cpp"
static int cppDefined = 0;	/* explicit path for C preprocessor */


static char *cmdname;

static char *svcclosetime = "120";
static char *CPP = SUNOS_CPP;
static char CPPFLAGS[] = "-C";
static char pathbuf[MAXPATHLEN + 1];
static char *allv[] = {
	"rpcgen", "-s", "udp", "-s", "tcp",
};
static int allc = sizeof (allv)/sizeof (allv[0]);
static char *allnv[] = {
	"rpcgen", "-s", "netpath",
};
static int allnc = sizeof (allnv)/sizeof (allnv[0]);

/*
 * machinations for handling expanding argument list
 */
static void addarg(char *);	/* add another argument to the list */
static void putarg(int, char *); /* put argument at specified location  */
static void clear_args(void);	/* clear argument list */
static void checkfiles(char *, char *);	/* check if out file already exists */


#define	ARGLISTLEN	20
#define	FIXEDARGS	2

static char *arglist[ARGLISTLEN];
static int argcount = FIXEDARGS;


int nonfatalerrors;	/* errors */
int inetdflag;	/* Support for inetd  is now the default */
int pmflag;		/* Support for port monitors */
int logflag;		/* Use syslog instead of fprintf for errors */
int tblflag;		/* Support for dispatch table file */
int mtflag = 0;		/* Support for MT */
int mtauto = 0;		/* Enable automatic mode */
int rflag = 1;		/* Eliminate tail recursion from structures */
#define	INLINE 5
/* length at which to start doing an inline */

int inlinelen = INLINE;
/*
 * Length at which to start doing an inline. INLINE = default
 * if 0, no xdr_inline code
 */

int indefinitewait;	/* If started by port monitors, hang till it wants */
int exitnow;		/* If started by port monitors, exit after the call */
int timerflag;		/* TRUE if !indefinite && !exitnow */
int newstyle;		/* newstyle of passing arguments (by value) */
int Cflag = 0;		/* ANSI C syntax */
int CCflag = 0;		/* C++ files */
static int allfiles;   /* generate all files */
int tirpcflag = 1;    /* generating code for tirpc, by default */
xdrfunc *xdrfunc_head = NULL; /* xdr function list */
xdrfunc *xdrfunc_tail = NULL; /* xdr function list */
pid_t childpid;


int
main(int argc, char *argv[])
{
	struct commandline cmd;

	(void) memset(&cmd, 0, sizeof (struct commandline));
	clear_args();
	if (!parseargs(argc, argv, &cmd))
		usage();
	/*
	 * Only the client and server side stubs are likely to be customized,
	 *  so in that case only, check if the outfile exists, and if so,
	 *  print an error message and exit.
	 */
	if (cmd.Ssflag || cmd.Scflag || cmd.makefileflag)
		checkfiles(cmd.infile, cmd.outfile);
	else
		checkfiles(cmd.infile, NULL);

	if (cmd.cflag) {
		c_output(cmd.infile, "-DRPC_XDR", DONT_EXTEND, cmd.outfile);
	} else if (cmd.hflag) {
		h_output(cmd.infile, "-DRPC_HDR", DONT_EXTEND, cmd.outfile);
	} else if (cmd.lflag) {
		l_output(cmd.infile, "-DRPC_CLNT", DONT_EXTEND, cmd.outfile);
	} else if (cmd.sflag || cmd.mflag || (cmd.nflag)) {
		s_output(argc, argv, cmd.infile, "-DRPC_SVC", DONT_EXTEND,
			cmd.outfile, cmd.mflag, cmd.nflag);
	} else if (cmd.tflag) {
		t_output(cmd.infile, "-DRPC_TBL", DONT_EXTEND, cmd.outfile);
	} else if (cmd.Ssflag) {
		svc_output(cmd.infile, "-DRPC_SERVER", DONT_EXTEND,
			cmd.outfile);
	} else if (cmd.Scflag) {
		clnt_output(cmd.infile, "-DRPC_CLIENT", DONT_EXTEND,
			    cmd.outfile);
	} else if (cmd.makefileflag) {
		mkfile_output(&cmd);
	} else {
		/* the rescans are required, since cpp may effect input */
		c_output(cmd.infile, "-DRPC_XDR", EXTEND, "_xdr.c");
		reinitialize();
		h_output(cmd.infile, "-DRPC_HDR", EXTEND, ".h");
		reinitialize();
		l_output(cmd.infile, "-DRPC_CLNT", EXTEND, "_clnt.c");
		reinitialize();
		if (inetdflag || !tirpcflag)
			s_output(allc, allv, cmd.infile, "-DRPC_SVC", EXTEND,
			"_svc.c", cmd.mflag, cmd.nflag);
		else
			s_output(allnc, allnv, cmd.infile, "-DRPC_SVC",
				EXTEND, "_svc.c", cmd.mflag, cmd.nflag);
		if (tblflag) {
			reinitialize();
			t_output(cmd.infile, "-DRPC_TBL", EXTEND, "_tbl.i");
		}

		if (allfiles) {
			reinitialize();
			svc_output(cmd.infile, "-DRPC_SERVER", EXTEND,
				"_server.c");
			reinitialize();
			clnt_output(cmd.infile, "-DRPC_CLIENT", EXTEND,
				"_client.c");

		}
		if (allfiles || (cmd.makefileflag == 1)) {
			reinitialize();
			mkfile_output(&cmd);
		}

	}
	return (nonfatalerrors);
}


/*
 * add extension to filename
 */
static char *
extendfile(char *file, char *ext)
{
	char *res;
	char *p;

	res = malloc(strlen(file) + strlen(ext) + 1);
	if (res == NULL)
		abort();
	p = strrchr(file, '.');
	if (p == NULL)
		p = file + strlen(file);
	(void) strcpy(res, file);
	(void) strcpy(res + (p - file), ext);
	return (res);
}

/*
 * Open output file with given extension
 */
static void
open_output(char *infile, char *outfile)
{

	if (outfile == NULL) {
		fout = stdout;
		return;
	}

	if (infile != NULL && streq(outfile, infile)) {
	f_print(stderr, "%s: %s already exists.  No output generated.\n",
		cmdname, infile);
		crash();
	}
	fout = fopen(outfile, "w");
	if (fout == NULL) {
		f_print(stderr, "%s: unable to open ", cmdname);
		perror(outfile);
		crash();
	}
	record_open(outfile);

}

static void
add_warning(void)
{
	f_print(fout, "/*\n");
	f_print(fout, " * Please do not edit this file.\n");
	f_print(fout, " * It was generated using rpcgen.\n");
	f_print(fout, " */\n\n");
}

/* clear list of arguments */
static void
clear_args(void)
{
	int i;

	for (i = FIXEDARGS; i < ARGLISTLEN; i++)
		arglist[i] = NULL;
	argcount = FIXEDARGS;
}

/* make sure that a CPP exists */
static void
find_cpp(void)
{
	struct stat buf;

	if (stat(CPP, &buf) < 0)  { /* SVR4 or explicit cpp does not exist */
		if (cppDefined) {
			(void) fprintf(stderr,
				"cannot find C preprocessor: %s \n", CPP);
			crash();
		} else {	/* try the other one */
			CPP = SUNOS_CPP;
			if (stat(CPP, &buf) < 0) { /* can't find any cpp */
				(void) fprintf(stderr,
		"cannot find any C preprocessor (cpp)\n");
				crash();
			}
		}
	}
}

/*
 * Open input file with given define for C-preprocessor
 */
static void
open_input(char *infile, char *define)
{
	int pd[2];

	infilename = (infile == NULL) ? "<stdin>" : infile;
	(void) pipe(pd);
	switch (childpid = fork()) {
	case 0:
		find_cpp();
		putarg(0, CPP);
		putarg(1, CPPFLAGS);
		addarg(define);
		if (infile)
			addarg(infile);
		addarg((char *)NULL);
		(void) close(1);
		(void) dup2(pd[1], 1);
		(void) close(pd[0]);
		(void) execv(arglist[0], arglist);
		perror("execv");
		exit(1);
		/* NOTREACHED */
	case -1:
		perror("fork");
		exit(1);
	}
	(void) close(pd[1]);
	fin = fdopen(pd[0], "r");
	if (fin == NULL) {
		f_print(stderr, "%s: ", cmdname);
		perror(infilename);
		crash();
	}
}

/* valid tirpc nettypes */
static char *valid_ti_nettypes[] = {
	"netpath",
	"visible",
	"circuit_v",
	"datagram_v",
	"circuit_n",
	"datagram_n",
	"udp",
	"tcp",
	"raw",
	NULL
};

/* valid inetd nettypes */
static char *valid_i_nettypes[] = {
	"udp",
	"tcp",
	NULL
};

static int
check_nettype(char *name, char *list_to_check[])
{
	int i;
	for (i = 0; list_to_check[i] != NULL; i++) {
		if (strcmp(name, list_to_check[i]) == 0) {
			return (1);
		}
	}
	f_print(stderr, "illegal nettype :\'%s\'\n", name);
	return (0);
}

static char *
file_name(char *file, char *ext)
{
	char *temp;
	temp = extendfile(file, ext);

	if (access(temp, F_OK) != -1)
		return (temp);
	else
		return ((char *)" ");
}


static void
c_output(char *infile, char *define, int extend, char *outfile)
{
	definition *def;
	char *include;
	char *outfilename;
	long tell;

	c_initialize();
	open_input(infile, define);
	outfilename = extend ? extendfile(infile, outfile) : outfile;
	open_output(infile, outfilename);
	add_warning();
	if (infile && (include = extendfile(infile, ".h"))) {
		f_print(fout, "#include \"%s\"\n", include);
		free(include);
		/* .h file already contains rpc/rpc.h */
	} else
		f_print(fout, "#include <rpc/rpc.h>\n");
	/*
	 * Include stdlib.h to support mem_alloc calls.
	 */
	f_print(fout, "\n#ifndef _KERNEL\n");
	f_print(fout, "#include <stdlib.h>\n");
	f_print(fout, "#endif /* !_KERNEL */\n\n");
	tell = ftell(fout);
	while (def = get_definition()) {
		emit(def);
	}
	if (extend && tell == ftell(fout)) {
		(void) unlink(outfilename);
	}
}


static void
c_initialize(void)
{
	/*
	 * add all the starting basic types.
	 * We may need to add some derived types
	 * if we need to generate INLINE macros.
	 * These types are defined in rpc/types.h
	 */
	add_type(1, "int");
	add_type(1, "long");
	add_type(1, "short");
	add_type(1, "bool");
	add_type(1, "u_int");
	add_type(1, "u_long");
	add_type(1, "u_short");
	add_type(1, "rpcprog_t");
	add_type(1, "rpcvers_t");
	add_type(1, "rpcproc_t");
	add_type(1, "rpcprot_t");
	add_type(1, "rpcport_t");
}

char rpcgen_table_dcl1[] = "struct rpcgen_table {\n";

char rpcgen_table_dcl2[] = "\txdrproc_t\txdr_arg;\n"
				"\tunsigned\tlen_arg;\n"
				"\txdrproc_t\txdr_res;\n"
				"\tunsigned\tlen_res;\n"
				"};\n";

char rpcgen_table_proc[] = "\tvoid\t*(*proc)();\n";

char rpcgen_table_proc_b[] = "\tchar\t*(*proc)();\n";


char *
generate_guard(char *pathname)
{
	char *filename, *guard, *tmp;

	filename = strrchr(pathname, '/');  /* find last component */
	filename = ((filename == 0) ? pathname : filename+1);
	guard = extendfile(filename, "_H_RPCGEN");

	/*
	 * Guard must be an ANSI C identifier composed of
	 * upper case letters, digits, or '_'.
	 * Convert invalid characters to '_'.
	 */
	for (tmp = guard; *tmp; tmp++) {
		if (!isalpha(*tmp) && !isdigit(*tmp)) {
			*tmp = '_';
			continue;
		}
		if (islower(*tmp))
			*tmp = toupper(*tmp);
	}

	/*
	 * The first character must be a letter; the underscore '_'
	 * counts as a letter.
	 */
	if (!isalpha(guard[0]))
		guard[0] = '_';

	return (guard);
}

/*
 * Compile into an XDR header file
 */


static void
h_output(char *infile, char *define, int extend, char *outfile)
{
	definition *def;
	char *outfilename;
	long tell;
	char *guard;
	list *l;
	xdrfunc *xdrfuncp;
	int i;

	open_input(infile, define);
	outfilename =  extend ? extendfile(infile, outfile) : outfile;
	open_output(infile, outfilename);
	add_warning();
	if (outfilename || infile)
		guard = generate_guard(outfilename ? outfilename: infile);
	else
		guard = "STDIN_";

	f_print(fout, "#ifndef _%s\n#define	_%s\n\n", guard, guard);

	f_print(fout, "#include <rpc/rpc.h>\n");

	if (mtflag) {
		f_print(fout, "#ifndef _KERNEL\n");
		f_print(fout, "#include <synch.h>\n");
		f_print(fout, "#include <thread.h>\n");
		f_print(fout, "#endif /* !_KERNEL */\n");
	};

	/* put the C++ support */
	if (Cflag && !CCflag) {
		f_print(fout, "\n#ifdef __cplusplus\n");
		f_print(fout, "extern \"C\" {\n");
		f_print(fout, "#endif\n\n");
	}

	/* put in a typedef for quadprecision. Only with Cflag */

	tell = ftell(fout);

	/* print data definitions */
	while (def = get_definition())
		print_datadef(def);

	/*
	 * print function declarations.
	 *  Do this after data definitions because they might be used as
	 *  arguments for functions
	 */
	for (l = defined; l != NULL; l = l->next)
		print_funcdef(l->val);
	/* Now  print all xdr func declarations */
	if (xdrfunc_head != NULL) {
		f_print(fout, "\n/* the xdr functions */\n");

		if (CCflag) {
			f_print(fout, "\n#ifdef __cplusplus\n");
			f_print(fout, "extern \"C\" {\n");
			f_print(fout, "#endif\n");
		}

		if (!Cflag) {
			xdrfuncp = xdrfunc_head;
			while (xdrfuncp != NULL) {
				print_xdr_func_def(xdrfuncp->name,
							xdrfuncp->pointerp, 2);
				xdrfuncp = xdrfuncp->next;
			}
		} else {
			for (i = 1; i < 3; i++) {
				if (i == 1)
					f_print(fout,
"\n#if defined(__STDC__) || defined(__cplusplus)\n");
				else
					f_print(fout, "\n#else /* K&R C */\n");

				xdrfuncp = xdrfunc_head;
				while (xdrfuncp != NULL) {
					print_xdr_func_def(xdrfuncp->name,
							xdrfuncp->pointerp, i);
					xdrfuncp = xdrfuncp->next;
				}
			}
			f_print(fout, "\n#endif /* K&R C */\n");
		}
	}

	if (extend && tell == ftell(fout)) {
		(void) unlink(outfilename);
	} else if (tblflag) {
		f_print(fout, rpcgen_table_dcl1);
		if (tirpcflag)
			f_print(fout, rpcgen_table_proc);
		else
			f_print(fout, rpcgen_table_proc_b);
		f_print(fout, rpcgen_table_dcl2);
	}

	if (Cflag) {
		f_print(fout, "\n#ifdef __cplusplus\n");
		f_print(fout, "}\n");
		f_print(fout, "#endif\n");
	}

	f_print(fout, "\n#endif /* !_%s */\n", guard);
}

/*
 * Compile into an RPC service
 */
static void
s_output(int argc, char *argv[], char *infile, char *define, int extend,
					char *outfile, int nomain, int netflag)
{
	char *include;
	definition *def;
	int foundprogram = 0;
	char *outfilename;

	open_input(infile, define);
	outfilename = extend ? extendfile(infile, outfile) : outfile;
	open_output(infile, outfilename);
	add_warning();
	if (infile && (include = extendfile(infile, ".h"))) {
		f_print(fout, "#include \"%s\"\n", include);
		free(include);
	} else
		f_print(fout, "#include <rpc/rpc.h>\n");

	f_print(fout, "#include <stdio.h>\n");
	f_print(fout, "#include <stdlib.h> /* getenv, exit */\n");
	f_print(fout, "#include <signal.h>\n");

	if (Cflag) {
		f_print(fout,
		"#include <rpc/pmap_clnt.h> /* for pmap_unset */\n");
		f_print(fout, "#include <string.h> /* strcmp */\n");
	}
	if (strcmp(svcclosetime, "-1") == 0)
		indefinitewait = 1;
	else if (strcmp(svcclosetime, "0") == 0)
		exitnow = 1;
	else if (inetdflag || pmflag)
		timerflag = 1;

	if (!tirpcflag && inetdflag)
		f_print(fout, "#include <sys/termios.h> /* TIOCNOTTY */\n");
	if (Cflag && (inetdflag || pmflag))
		if (tirpcflag)
			f_print(fout, "#include <unistd.h> /* setsid */\n");
	if (tirpcflag)
		f_print(fout, "#include <sys/types.h>\n");

	f_print(fout, "#include <memory.h>\n");
	f_print(fout, "#include <stropts.h>\n");
	if (inetdflag || !tirpcflag) {
		f_print(fout, "#include <sys/socket.h>\n");
		f_print(fout, "#include <netinet/in.h>\n");
		f_print(fout, "#include <rpc/svc_soc.h>\n");
	}

	if ((netflag || pmflag) && tirpcflag && !nomain)
		f_print(fout, "#include <netconfig.h>\n");
	if (tirpcflag)
		f_print(fout, "#include <sys/resource.h> /* rlimit */\n");
	if (logflag || inetdflag || pmflag)
		f_print(fout, "#include <syslog.h>\n");

	/* for ANSI-C */
	if (Cflag)
		f_print(fout,
			"\n#ifndef SIG_PF\n#define	SIG_PF void(*)\
(int)\n#endif\n");

	f_print(fout, "\n#ifdef DEBUG\n#define	RPC_SVC_FG\n#endif\n");
	if (timerflag)
		f_print(fout, "\n#define	_RPCSVC_CLOSEDOWN %s\n",
			svcclosetime);
	while (def = get_definition())
		foundprogram |= (def->def_kind == DEF_PROGRAM);
	if (extend && !foundprogram) {
		(void) unlink(outfilename);
		return;
	}
	write_most(infile, netflag, nomain);
	if (!nomain) {
		if (!do_registers(argc, argv)) {
			if (outfilename)
				(void) unlink(outfilename);
			usage();
		}
		write_rest();
	}
}

/*
 * generate client side stubs
 */
static void
l_output(char *infile, char *define, int extend, char *outfile)
{
	char *include;
	definition *def;
	int foundprogram = 0;
	char *outfilename;

	open_input(infile, define);
	outfilename = extend ? extendfile(infile, outfile) : outfile;
	open_output(infile, outfilename);
	add_warning();
	if (Cflag)
		f_print(fout, "#include <memory.h> /* for memset */\n");
	if (infile && (include = extendfile(infile, ".h"))) {
		f_print(fout, "#include \"%s\"\n", include);
		free(include);
	} else
		f_print(fout, "#include <rpc/rpc.h>\n");

	f_print(fout, "#ifndef _KERNEL\n");
	f_print(fout, "#include <stdio.h>\n");
	f_print(fout, "#include <stdlib.h> /* getenv, exit */\n");
	f_print(fout, "#endif /* !_KERNEL */\n");

	while (def = get_definition())
		foundprogram |= (def->def_kind == DEF_PROGRAM);
	if (extend && !foundprogram) {
		(void) unlink(outfilename);
		return;
	}
	write_stubs();
}

/*
 * generate the dispatch table
 */
static void
t_output(char *infile, char *define, int extend, char *outfile)
{
	definition *def;
	int foundprogram = 0;
	char *outfilename;

	open_input(infile, define);
	outfilename = extend ? extendfile(infile, outfile) : outfile;
	open_output(infile, outfilename);
	add_warning();
	while (def = get_definition()) {
		foundprogram |= (def->def_kind == DEF_PROGRAM);
	}
	if (extend && !foundprogram) {
		(void) unlink(outfilename);
		return;
	}
	write_tables();
}

/* sample routine for the server template */
static void
svc_output(char *infile, char *define, int extend, char *outfile)
{
	definition *def;
	char *include;
	char *outfilename;
	long tell;
	open_input(infile, define);
	outfilename = extend ? extendfile(infile, outfile) : outfile;
	checkfiles(infile, outfilename);
	/*
	 * Check if outfile already exists.
	 * if so, print an error message and exit
	 */
	open_output(infile, outfilename);
	add_sample_msg();

	if (infile && (include = extendfile(infile, ".h"))) {
		f_print(fout, "#include \"%s\"\n", include);
		free(include);
	} else {
		f_print(fout, "#include <rpc/rpc.h>\n");
	}

	f_print(fout, "#include <stdio.h>\n");
	f_print(fout, "#include <stdlib.h> /* getenv, exit */\n");
	f_print(fout, "#include <signal.h>\n");

	tell = ftell(fout);
	while (def = get_definition())
		write_sample_svc(def);
	if (extend && tell == ftell(fout))
		(void) unlink(outfilename);
}

/* sample main routine for client */
static void
clnt_output(char *infile, char *define, int extend, char *outfile)
{
	definition *def;
	char *include;
	char *outfilename;
	long tell;
	int has_program = 0;

	open_input(infile, define);
	outfilename = extend ? extendfile(infile, outfile) : outfile;
	checkfiles(infile, outfilename);
	/*
	 * Check if outfile already exists.
	 * if so, print an error message and exit
	 */

	open_output(infile, outfilename);
	add_sample_msg();
	if (infile && (include = extendfile(infile, ".h"))) {
		f_print(fout, "#include \"%s\"\n", include);
		free(include);
	} else
		f_print(fout, "#include <rpc/rpc.h>\n");

	f_print(fout, "#include <stdio.h>\n");
	f_print(fout, "#include <stdlib.h> /* getenv, exit */\n");

	tell = ftell(fout);
	while (def = get_definition())
		has_program += write_sample_clnt(def);

	if (has_program)
		write_sample_clnt_main();

	if (extend && tell == ftell(fout))
		(void) unlink(outfilename);
}


static void
mkfile_output(struct commandline *cmd)
{
	char *mkfilename, *clientname, *clntname, *xdrname, *hdrname;
	char *servername, *svcname, *servprogname, *clntprogname;
	char *temp;

	svcname = file_name(cmd->infile, "_svc.c");
	clntname = file_name(cmd->infile, "_clnt.c");
	xdrname = file_name(cmd->infile, "_xdr.c");
	hdrname = file_name(cmd->infile, ".h");


	if (allfiles) {
		servername = extendfile(cmd->infile, "_server.c");
		clientname = extendfile(cmd->infile, "_client.c");
	} else {
		servername = " ";
		clientname = " ";
	}
	servprogname = extendfile(cmd->infile, "_server");
	clntprogname = extendfile(cmd->infile, "_client");

	if (allfiles) {
		mkfilename = malloc(strlen("makefile.") +
			strlen(cmd->infile) + 1);
		if (mkfilename == NULL) {
			f_print(stderr, "Out of memory!\n");
			return;
		}
		temp = (char *)rindex(cmd->infile, '.');
		(void) strcpy(mkfilename, "makefile.");
		(void) strncat(mkfilename, cmd->infile,
			(temp - cmd->infile));
	} else
		mkfilename = cmd->outfile;


	checkfiles(NULL, mkfilename);
	open_output(NULL, mkfilename);

	f_print(fout, "\n# This is a template makefile generated\
		by rpcgen \n");

	f_print(fout, "\n# Parameters \n\n");

	f_print(fout, "CLIENT = %s\nSERVER = %s\n\n",
		clntprogname, servprogname);
	f_print(fout, "SOURCES_CLNT.c = \nSOURCES_CLNT.h = \n");
	f_print(fout, "SOURCES_SVC.c = \nSOURCES_SVC.h = \n");
	f_print(fout, "SOURCES.x = %s\n\n", cmd->infile);
	f_print(fout, "TARGETS_SVC.c = %s %s %s \n",
		svcname, servername, xdrname);
	f_print(fout, "TARGETS_CLNT.c = %s %s %s \n",
		clntname, clientname, xdrname);
	f_print(fout, "TARGETS = %s %s %s %s %s %s\n\n",
		hdrname, xdrname, clntname,
		svcname, clientname, servername);

	f_print(fout, "OBJECTS_CLNT = $(SOURCES_CLNT.c:%%.c=%%.o) "
			"$(TARGETS_CLNT.c:%%.c=%%.o) ");

	f_print(fout, "\nOBJECTS_SVC = $(SOURCES_SVC.c:%%.c=%%.o) "
			"$(TARGETS_SVC.c:%%.c=%%.o) ");


	f_print(fout, "\n# Compiler flags \n");
	if (mtflag)
		f_print(fout, "\nCPPFLAGS += -D_REENTRANT\n"
			"CFLAGS += -g\nLDLIBS += -lnsl\n");
	else
		f_print(fout, "\nCFLAGS += -g \nLDLIBS += -lnsl\n");
	f_print(fout, "RPCGENFLAGS = \n");

	f_print(fout, "\n# Targets \n\n");

	f_print(fout, "all : $(CLIENT) $(SERVER)\n\n");
	f_print(fout, "$(TARGETS) : $(SOURCES.x) \n");
	f_print(fout, "\trpcgen $(RPCGENFLAGS) $(SOURCES.x)\n\n");
	f_print(fout, "$(OBJECTS_CLNT) : $(SOURCES_CLNT.c) $(SOURCES_CLNT.h) \
$(TARGETS_CLNT.c) \n\n");

	f_print(fout, "$(OBJECTS_SVC) : $(SOURCES_SVC.c) $(SOURCES_SVC.h) \
$(TARGETS_SVC.c) \n\n");
	f_print(fout, "$(CLIENT) : $(OBJECTS_CLNT) \n");
	f_print(fout, "\t$(LINK.c) -o $(CLIENT) $(OBJECTS_CLNT) \
$(LDLIBS) \n\n");
	f_print(fout, "$(SERVER) : $(OBJECTS_SVC) \n");
	f_print(fout, "\t$(LINK.c) -o $(SERVER) $(OBJECTS_SVC) $(LDLIBS)\n\n ");
	f_print(fout, "clean:\n\t $(RM) core $(TARGETS) $(OBJECTS_CLNT) \
$(OBJECTS_SVC) $(CLIENT) $(SERVER)\n\n");
}


/*
 * Perform registrations for service output
 * Return 0 if failed; 1 otherwise.
 */
static int
do_registers(int argc, char *argv[])
{
	int i;

	if (inetdflag || !tirpcflag) {
		for (i = 1; i < argc; i++) {
			if (streq(argv[i], "-s")) {
				if (!check_nettype(argv[i + 1],
						    valid_i_nettypes))
					return (0);
				write_inetd_register(argv[i + 1]);
				i++;
			}
		}
	} else {
		for (i = 1; i < argc; i++)
			if (streq(argv[i], "-s")) {
				if (!check_nettype(argv[i + 1],
						    valid_ti_nettypes))
					return (0);
				write_nettype_register(argv[i + 1]);
				i++;
			} else if (streq(argv[i], "-n")) {
				write_netid_register(argv[i + 1]);
				i++;
			}
	}
	return (1);
}

/*
 * Add another argument to the arg list
 */
static void
addarg(char *cp)
{
	if (argcount >= ARGLISTLEN) {
		f_print(stderr, "rpcgen: too many defines\n");
		crash();
		/*NOTREACHED*/
	}
	arglist[argcount++] = cp;
}

static void
putarg(int where, char *cp)
{
	if (where >= ARGLISTLEN) {
		f_print(stderr, "rpcgen: arglist coding error\n");
		crash();
		/*NOTREACHED*/
	}
	arglist[where] = cp;
}

/*
 * if input file is stdin and an output file is specified then complain
 * if the file already exists. Otherwise the file may get overwritten
 * If input file does not exist, exit with an error
 */
static void
checkfiles(char *infile, char *outfile)
{
	struct stat buf;

	if (infile) {		/* infile ! = NULL */
		if (stat(infile, &buf) < 0) {
			perror(infile);
			crash();
		}
	}
	if (outfile) {
		if (stat(outfile, &buf) < 0)
			return;	/* file does not exist */
		f_print(stderr,
			"file '%s' already exists and may be overwritten\n",
			outfile);
		crash();
	}
}

/*
 * Parse command line arguments
 */
static uint_t
parseargs(int argc, char *argv[], struct commandline *cmd)
{
	int i;
	int j;
	char c, ch;
	char flag[(1 << 8 * sizeof (char))];
	int nflags;

	cmdname = argv[0];
	cmd->infile = cmd->outfile = NULL;
	if (argc < 2)
		return (0);
	allfiles = 0;
	flag['c'] = 0;
	flag['h'] = 0;
	flag['l'] = 0;
	flag['m'] = 0;
	flag['o'] = 0;
	flag['s'] = 0;
	flag['n'] = 0;
	flag['t'] = 0;
	flag['S'] = 0;
	flag['C'] = 0;
	flag['M'] = 0;

	for (i = 1; i < argc; i++) {
		if (argv[i][0] != '-') {
			if (cmd->infile) {
				f_print(stderr,
	"Cannot specify more than one input file.\n");

				return (0);
			}
			cmd->infile = argv[i];
		} else {
			for (j = 1; argv[i][j] != 0; j++) {
				c = argv[i][j];
				switch (c) {
				case 'a':
					allfiles = 1;
					break;
				case 'c':
				case 'h':
				case 'l':
				case 'm':
				case 't':
					if (flag[c])
						return (0);
					flag[c] = 1;
					break;
				case 'S':
					/*
					 * sample flag: Ss or Sc.
					 *  Ss means set flag['S'];
					 *  Sc means set flag['C'];
					 *  Sm means set flag['M'];
					 */
					ch = argv[i][++j]; /* get next char */
					if (ch == 's')
						ch = 'S';
					else if (ch == 'c')
						ch = 'C';
					else if (ch == 'm')
						ch = 'M';
					else
						return (0);

					if (flag[ch])
						return (0);
					flag[ch] = 1;
					break;
				case 'C': /* ANSI C syntax */
					Cflag = 1;
					ch = argv[i][j+1]; /* get next char */

					if (ch != 'C')
						break;
					CCflag = 1;
					break;
				case 'b':
					/*
					 *  Turn TIRPC flag off for
					 *  generating backward compatible
					 *  code
					 */
					tirpcflag = 0;
					break;

				case 'I':
					inetdflag = 1;
					break;
				case 'N':
					newstyle = 1;
					break;
				case 'L':
					logflag = 1;
					break;
				case 'K':
					if (++i == argc)
						return (0);
					svcclosetime = argv[i];
					goto nextarg;
				case 'T':
					tblflag = 1;
					break;
				case 'A':
					mtauto = 1;
					/* FALLTHRU */
				case 'M':
					mtflag = 1;
					break;
				case 'i' :
					if (++i == argc)
						return (0);
					inlinelen = atoi(argv[i]);
					goto nextarg;
				case 'n':
				case 'o':
				case 's':
					if (argv[i][j - 1] != '-' ||
					    argv[i][j + 1] != 0)
						return (0);
					flag[c] = 1;
					if (++i == argc)
						return (0);
					if (c == 'o') {
						if (cmd->outfile)
							return (0);
						cmd->outfile = argv[i];
					}
					goto nextarg;
				case 'D':
					if (argv[i][j - 1] != '-')
						return (0);
					(void) addarg(argv[i]);
					goto nextarg;
				case 'v':
					version_info();
					return (0);
				case 'Y':
					if (++i == argc)
						return (0);
					(void) strcpy(pathbuf, argv[i]);
					(void) strcat(pathbuf, "/cpp");
					CPP = pathbuf;
					cppDefined = 1;
					goto nextarg;
				case 'r':
					rflag = !rflag;
					break;
				default:
					return (0);
				}
			}
		nextarg:
			;
		}
	}

	cmd->cflag = flag['c'];
	cmd->hflag = flag['h'];
	cmd->lflag = flag['l'];
	cmd->mflag = flag['m'];
	cmd->nflag = flag['n'];
	cmd->sflag = flag['s'];
	cmd->tflag = flag['t'];
	cmd->Ssflag = flag['S'];
	cmd->Scflag = flag['C'];
	cmd->makefileflag = flag['M'];

	if (tirpcflag) {
		if (inetdflag) {
			f_print(stderr,
				"Cannot use -I flag without -b flag.\n");
			return (0);
		}
		pmflag = 1;
	} else {		/* 4.1 mode */
		pmflag = 0;	/* set pmflag only in tirpcmode */
		inetdflag = 1;	/* inetdflag is TRUE by default */
		if (cmd->nflag) { /* netid needs TIRPC */
			f_print(stderr,
				"Cannot use netid flag without TIRPC.\n");
			return (0);
		}
	}

	if (newstyle && (tblflag || cmd->tflag)) {
		f_print(stderr, "Cannot use table flags with newstyle.\n");
		return (0);
	}

	/* check no conflicts with file generation flags */
	nflags = cmd->cflag + cmd->hflag + cmd->lflag + cmd->mflag +
		cmd->sflag + cmd->nflag + cmd->tflag + cmd->Ssflag +
			cmd->Scflag + cmd->makefileflag;

	if (nflags == 0) {
		if (cmd->outfile != NULL || cmd->infile == NULL)
			return (0);
	} else if (cmd->infile == NULL &&
	    (cmd->Ssflag || cmd->Scflag || cmd->makefileflag)) {
		f_print(stderr, "\"infile\" is required for template"
			" generation flags.\n");
		return (0);
	}
	if (nflags > 1) {
		f_print(stderr,
			"Cannot have more than one file generation flag.\n");
		return (0);
	}
	return (1);
}

static void
usage(void)
{
	f_print(stderr, "%s  (%d.%d)\n", cmdname, RPCGEN_MAJOR, RPCGEN_MINOR);
	f_print(stderr, "usage:  %s infile\n", cmdname);
	f_print(stderr, "\t%s [-abCLNTMA] [-Dname[=value]] [-i size]"
		" [-I [-K seconds]] [-Y path] infile\n", cmdname);
	f_print(stderr, "\t%s [-c | -h | -l | -m | -t | -Sc | -Ss | -Sm]"
		" [-o outfile] [infile]\n", cmdname);
	f_print(stderr, "\t%s [-s nettype]* [-o outfile] [infile]\n", cmdname);
	f_print(stderr, "\t%s [-n netid]* [-o outfile] [infile]\n", cmdname);
	options_usage();
	exit(1);
}

static void
version_info(void)
{
	f_print(stderr, "%s %d.%d\n", cmdname, RPCGEN_MAJOR, RPCGEN_MINOR);
	exit(1);
}

static void
options_usage(void)
{
	f_print(stderr, "options:\n");
	f_print(stderr, "-a\t\tgenerate all files, including samples\n");
	f_print(stderr, "-A\t\tgenerate code to enable automatic MT mode\n");
	f_print(stderr, "-b\t\tbackward compatibility mode (generates code"
			" for SunOS 4.X)\n");
	f_print(stderr, "-c\t\tgenerate XDR routines\n");
	f_print(stderr, "-C\t\tANSI C mode\n");
	f_print(stderr, "-Dname[=value]\tdefine a symbol (same as #define)\n");
	f_print(stderr, "-h\t\tgenerate header file\n");
	f_print(stderr, "-i size\t\tsize at which to start generating"
			" inline code\n");
	f_print(stderr, "-I\t\tgenerate code for inetd support in server"
			" (for SunOS 4.X)\n");
	f_print(stderr, "-K seconds\tserver exits after K seconds of"
			" inactivity\n");
	f_print(stderr, "-l\t\tgenerate client side stubs\n");
	f_print(stderr, "-L\t\tserver errors will be printed to syslog\n");
	f_print(stderr, "-m\t\tgenerate server side stubs\n");
	f_print(stderr, "-M\t\tgenerate MT-safe code\n");
	f_print(stderr, "-n netid\tgenerate server code that supports"
			" named netid\n");
	f_print(stderr, "-N\t\tsupports multiple arguments and"
			" call-by-value\n");
	f_print(stderr, "-o outfile\tname of the output file\n");
	f_print(stderr, "-s nettype\tgenerate server code that supports named"
			" nettype\n");
	f_print(stderr, "-Sc\t\tgenerate sample client code that uses remote"
			" procedures\n");
	f_print(stderr, "-Ss\t\tgenerate sample server code that defines"
			" remote procedures\n");
	f_print(stderr, "-Sm \t\tgenerate makefile template \n");

	f_print(stderr, "-t\t\tgenerate RPC dispatch table\n");
	f_print(stderr, "-T\t\tgenerate code to support RPC dispatch tables\n");
	f_print(stderr, "-v\t\tprint version information and exit\n");
	f_print(stderr, "-Y path\t\tpath where cpp is found\n");
	exit(1);
}