/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user.
 *
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 *
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 *
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 *
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 *
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 */


/*
 * rpc_main.c, Top level of the RPC protocol compiler.
 * Copyright (C) 1987, Sun Microsystems, Inc.
 */

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

static void c_output(const char *, const char *, int, const char *);
static void h_output(const char *, const char *, int, const char *, int);
static void l_output(const char *, const char *, int, const char *);
static void t_output(const char *, const char *, int, const char *);
static void clnt_output(const char *, const char *, int, const char * );
static char *generate_guard(const char *);
static void c_initialize(void);

static void usage(void) __dead2;
static void options_usage(void);
static int do_registers(int, const char **);
static int parseargs(int, const char **, struct commandline *);
static void svc_output(const char *, const char *, int, const char *);
static void mkfile_output(struct commandline *);
static void s_output(int, const char **, const char *, const char *, int, const char *, int, int);

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

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

/*
 * machinations for handling expanding argument list
 */
static void addarg(const char *);       /* add another argument to the list */
static void insarg(int, const char *);  /* insert arg at specified location */
static void checkfiles(const char *, const char *);
                                        /* check if out file already exists */

static char **arglist;
static int argcount = 0;
static int argmax = 0;

int nonfatalerrors;     /* errors */
int inetdflag = 0;      /* Support for inetd is disabled by default, use -I */
int pmflag = 0;         /* Support for port monitors is disabled by default */
int tirpc_socket = 1;   /* TI-RPC on socket, no TLI library */
int logflag;            /* Use syslog instead of fprintf for errors */
int tblflag;            /* Support for dispatch table file */
int mtflag = 0;         /* Support for MT */

#define INLINE 0
/* length at which to start doing an inline */

int inline_size = 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 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, const char *argv[])
{
        struct commandline cmd;

        (void) memset((char *)&cmd, 0, sizeof (struct commandline));
        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,
                    cmd.hflag);
        } 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", cmd.hflag);
                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);
                }

        }
        exit(nonfatalerrors);
        /* NOTREACHED */
}


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

        if ((file = strrchr(path, '/')) == NULL)
                file = path;
        else
                file++;
        res = xmalloc(strlen(file) + strlen(ext) + 1);
        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(const char *infile, const char *outfile)
{

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

        if (infile != NULL && streq(outfile, infile)) {
                warnx("%s already exists. No output generated", infile);
                crash();
        }
        fout = fopen(outfile, "w");
        if (fout == NULL) {
                warn("unable to open %s", outfile);
                crash();
        }
        record_open(outfile);

        return;
}

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");
}

/* prepend C-preprocessor and flags before arguments */
static void
prepend_cpp(void)
{
        int idx = 0, quoted;
        const char *var, *s;
        char *dupvar, *t, *word;

        if (CPP != NULL)
                insarg(idx++, CPP);
        else if ((var = getenv("RPCGEN_CPP")) == NULL)
                insarg(idx++, "/usr/bin/cpp");
        else {
                /*
                 * Parse command line like a shell (but only handle whitespace,
                 * quotes and backslash).
                 */
                dupvar = malloc(strlen(var) + 1);
                quoted = 0;
                word = NULL;
                for (s = var, t = dupvar; *s; ++s) {
                        switch (quoted) {
                        /* Unquoted */
                        case 0:
                                switch (*s) {
                                case ' ':
                                case '\t':
                                case '\n':
                                        if (word != NULL) {
                                                *t++ = '\0';
                                                insarg(idx++, word);
                                                word = NULL;
                                        }
                                        break;
                                case '\'':
                                        if (word == NULL)
                                                word = t;
                                        quoted = 1;
                                        break;
                                case '"':
                                        if (word == NULL)
                                                word = t;
                                        quoted = 2;
                                        break;
                                case '\\':
                                        switch (*(s + 1)) {
                                        case '\0':
                                                break;
                                        case '\n':
                                                ++s;
                                                continue;
                                        default:
                                                ++s;
                                                break;
                                        }
                                        /* FALLTHROUGH */
                                default:
                                        if (word == NULL)
                                                word = t;
                                        *t++ = *s;
                                        break;
                                }
                                break;

                        /* Single-quoted */
                        case 1:
                                switch (*s) {
                                case '\'':
                                        quoted = 0;
                                        break;
                                default:
                                        *t++ = *s;
                                        break;
                                }
                                break;

                        /* Double-quoted */
                        case 2:
                                switch (*s) {
                                case '"':
                                        quoted = 0;
                                        break;
                                case '\\':
                                        switch (*(s + 1)) {
                                        case '\0':
                                                break;
                                        case '$':
                                        case '`':
                                        case '"':
                                        case '\\':
                                                ++s;
                                                break;
                                        case '\n':
                                                ++s;
                                                continue;
                                        default:
                                                break;
                                        }
                                        /* FALLTHROUGH */
                                default:
                                        *t++ = *s;
                                        break;
                                }
                                break;
                        }
                }
                if (quoted)
                        errx(1, "RPCGEN_CPP: unterminated %c",
                            quoted == 1 ? '\'' : '"');
                if (word != NULL) {
                        *t++ = '\0';
                        insarg(idx++, word);
                }
                free(dupvar);
        }

        insarg(idx, CPPFLAGS);
}

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

        infilename = (infile == NULL) ? "<stdin>" : infile;
        (void) pipe(pd);
        switch (childpid = fork()) {
        case 0:
                prepend_cpp();
                addarg(define);
                if (infile)
                        addarg(infile);
                addarg((char *)NULL);
                (void) close(1);
                (void) dup2(pd[1], 1);
                (void) close(pd[0]);
                execvp(arglist[0], arglist);
                err(1, "execvp %s", arglist[0]);
        case -1:
                err(1, "fork");
        }
        (void) close(pd[1]);
        fin = fdopen(pd[0], "r");
        if (fin == NULL) {
                warn("%s", infilename);
                crash();
        }
}

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

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

static int
check_nettype(const char *name, const 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);
                }
        }
        warnx("illegal nettype :\'%s\'", name);
        return (0);
}

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

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

}


static void
c_output(const char *infile, const char *define, int extend, const char *outfile)
{
        definition *def;
        char *include;
        const 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");
        tell = ftell(fout);
        while ( (def = get_definition()) ) {
                emit(def);
        }
        if (extend && tell == ftell(fout)) {
                (void) unlink(outfilename);
        }
}


void
c_initialize(void)
{

        /* add all the starting basic types */
        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");

}

static const char rpcgen_table_dcl[] = "struct rpcgen_table {\n\
        char    *(*proc)(); \n\
        xdrproc_t       xdr_arg; \n\
        unsigned        len_arg; \n\
        xdrproc_t       xdr_res; \n\
        unsigned        len_res; \n\
}; \n";


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

        filename = strrchr(pathname, '/');  /* find last component */
        filename = ((filename == NULL) ? pathname : filename+1);
        guard = xstrdup(filename);
        stopat = strrchr(guard, '.');

        /*
         * Convert to a valid C macro name and make it upper case.
         * Map macro unfriendly characterss to '_'.
         */
        for (tmp = guard; *tmp != '\000'; ++tmp) {
                if (islower(*tmp))
                        *tmp = toupper(*tmp);
                else if (isupper(*tmp) || *tmp == '_')
                        /* OK for C */;
                else if (tmp == guard)
                        *tmp = '_';
                else if (isdigit(*tmp))
                        /* OK for all but first character */;
                else if (tmp == stopat) {
                        *tmp = '\0';
                        break;
                } else
                        *tmp = '_';
        }
        /*
         * Can't have a '_' in front, because it'll end up being "__".
         * "__" macros shoudln't be used. So, remove all of the
         * '_' characters from the front.
         */
        if (*guard == '_') {
                for (tmp = guard; *tmp == '_'; ++tmp)
                        ;
                strcpy(guard, tmp);
        }
        tmp = guard;
        guard = extendfile(guard, "_H_RPCGEN");
        free(tmp);
        return (guard);
}

/*
 * Compile into an XDR header file
 */


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

        open_input(infile, define);
        outfilename =  extend ? extendfile(infile, outfile) : outfile;
        open_output(infile, outfilename);
        add_warning();
        if (outfilename || infile){
                guard = tmp = 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, "#include <pthread.h>\n");

        /* put the C++ support */
        if (!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, headeronly);
        }

        /*
         * 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, headeronly);
        }
        /* 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");
                }

                xdrfuncp = xdrfunc_head;
                while (xdrfuncp != NULL){
                        print_xdr_func_def(xdrfuncp->name, xdrfuncp->pointerp);
                        xdrfuncp = xdrfuncp->next;
                }
        }

        if (extend && tell == ftell(fout)) {
                (void) unlink(outfilename);
        } else if (tblflag) {
                f_print(fout, rpcgen_table_dcl);
        }

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

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

/*
 * Compile into an RPC service
 */
static void
s_output(int argc, const char *argv[], const char *infile, const char *define,
    int extend, const char *outfile, int nomain, int netflag)
{
        char *include;
        definition *def;
        int foundprogram = 0;
        const 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 <rpc/pmap_clnt.h> /* for pmap_unset */\n");
        f_print (fout, "#include <string.h> /* strcmp */\n");
        if (tirpcflag)
                f_print(fout, "#include <rpc/rpc_com.h>\n");
        if (strcmp(svcclosetime, "-1") == 0)
                indefinitewait = 1;
        else if (strcmp(svcclosetime, "0") == 0)
                exitnow = 1;
        else if (inetdflag || pmflag) {
                f_print(fout, "#include <signal.h>\n");
                timerflag = 1;
        }

        if (!tirpcflag && inetdflag)
                f_print(fout, "#include <sys/ttycom.h> /* TIOCNOTTY */\n");
        if (inetdflag || pmflag) {
                f_print(fout, "#ifdef __cplusplus\n");
                f_print(fout,
                        "#include <sys/sysent.h> /* getdtablesize, open */\n");
                f_print(fout, "#endif /* __cplusplus */\n");
        }
        if (tirpcflag) {
                f_print(fout, "#include <fcntl.h> /* open */\n");
                f_print(fout, "#include <unistd.h> /* fork / setsid */\n");
                f_print(fout, "#include <sys/types.h>\n");
        }

        f_print(fout, "#include <string.h>\n");
        if (inetdflag || !tirpcflag) {
                f_print(fout, "#include <sys/socket.h>\n");
                f_print(fout, "#include <netinet/in.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 || tirpcflag)
                f_print(fout, "#include <syslog.h>\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(const char *infile, const char *define, int extend, const char *outfile)
{
        char *include;
        definition *def;
        int foundprogram = 0;
        const char *outfilename;

        open_input(infile, define);
        outfilename = extend ? extendfile(infile, outfile) : outfile;
        open_output(infile, outfilename);
        add_warning();
        f_print (fout, "#include <string.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");
        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(const char *infile, const char *define, int extend, const char *outfile)
{
        definition *def;
        int foundprogram = 0;
        const 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(const char *infile, const char *define, int extend, const char *outfile)
{
        definition *def;
        char *include;
        const 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");

        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(const char *infile, const char *define, int extend, const char *outfile)
{
        definition *def;
        char *include;
        const 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>\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)
{
        const char *mkfilename, *clientname, *clntname, *xdrname, *hdrname;
        const char *servername, *svcname, *servprogname, *clntprogname;
        char *temp, *mkftemp;

        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){
                mkftemp = xmalloc(strlen("makefile.") +
                                     strlen(cmd->infile) + 1);
                temp = strrchr(cmd->infile, '.');
                strcpy(mkftemp, "makefile.");
                (void) strncat(mkftemp, cmd->infile,
                        (temp - cmd->infile));
                mkfilename = mkftemp;
        } 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, "\nCFLAGS += -D_REENTRANT -D_THEAD_SAFE \nLDLIBS += -pthread\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");
        if (allfiles) {
                f_print(fout, "\trpcgen -Sc $(RPCGENFLAGS) $(SOURCES.x) -o %s\n\n", clientname);
                f_print(fout, "\trpcgen -Ss $(RPCGENFLAGS) $(SOURCES.x) -o %s\n\n", servername);
        }
        f_print(fout, "$(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) : $(OBJECTS_CLNT) \n");
        f_print(fout, "\t$(CC) -o $(CLIENT) $(OBJECTS_CLNT) \
$(LDLIBS) \n\n");
        f_print(fout, "$(SERVER) : $(OBJECTS_SVC) \n");
        f_print(fout, "\t$(CC) -o $(SERVER) $(OBJECTS_SVC) $(LDLIBS)\n\n");
        f_print(fout, "clean:\n\t rm -f 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, const 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);
}

/*
 * Extend the argument list
 */
static void
moreargs(void)
{
        char **newarglist;

        argmax = argmax == 0 ? 32 : argmax << 1;
        if (argmax > INT_MAX / 4) {
                warnx("refusing to allocate too many arguments");
                crash();
        }
        newarglist = realloc(arglist, argmax * sizeof(*arglist));
        if (newarglist == NULL) {
                warnx("unable to allocate arglist");
                crash();
        }
        arglist = newarglist;
}

/*
 * Add another argument to the arg list
 */
static void
addarg(const char *cp)
{
        if (argcount >= argmax)
                moreargs();

        if (cp != NULL)
                arglist[argcount++] = xstrdup(cp);
        else
                arglist[argcount++] = NULL;
}

/*
 * Insert an argument at the specified location
 */
static void
insarg(int place, const char *cp)
{
        int i;

        if (argcount >= argmax)
                moreargs();

        /* Move up existing arguments */
        for (i = argcount - 1; i >= place; i--)
                arglist[i + 1] = arglist[i];

        arglist[place] = xstrdup(cp);
        argcount++;
}

/*
 * 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(const char *infile, const char *outfile)
{

        struct stat buf;

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

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

        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) {
                                warnx("cannot specify more than one input file");
                                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[(int)c]) {
                                                return (0);
                                        }
                                        flag[(int)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[(int)ch]) {
                                                return (0);
                                        }
                                        flag[(int)ch] = 1;
                                        break;
                                case 'C': /* ANSI C syntax */
                                        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 'P':
                                        pmflag = 1;
                                        break;
                                case 'K':
                                        if (++i == argc) {
                                                return (0);
                                        }
                                        svcclosetime = argv[i];
                                        goto nextarg;
                                case 'T':
                                        tblflag = 1;
                                        break;
                                case 'M':
                                        mtflag = 1;
                                        break;
                                case 'i' :
                                        if (++i == argc) {
                                                return (0);
                                        }
                                        inline_size = atoi(argv[i]);
                                        goto nextarg;
                                case 'n':
                                case 'o':
                                case 's':
                                        if (argv[i][j - 1] != '-' ||
                                            argv[i][j + 1] != 0) {
                                                return (0);
                                        }
                                        flag[(int)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 'Y':
                                        if (++i == argc) {
                                                return (0);
                                        }
                                        if (strlcpy(pathbuf, argv[i],
                                            sizeof(pathbuf)) >= sizeof(pathbuf)
                                            || strlcat(pathbuf, "/cpp",
                                            sizeof(pathbuf)) >=
                                            sizeof(pathbuf)) {
                                                warnx("argument too long");
                                                return (0);
                                        }
                                        CPP = pathbuf;
                                        goto nextarg;



                                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)
                        pmflag = 0;
                if ((inetdflag && cmd->nflag)) {
                        /* netid not allowed with inetdflag */
                        warnx("cannot use netid flag with inetd flag");
                        return (0);
                }
        } else {                /* 4.1 mode */
                pmflag = 0;     /* set pmflag only in tirpcmode */
                if (cmd->nflag) { /* netid needs TIRPC */
                        warnx("cannot use netid flag without TIRPC");
                        return (0);
                }
        }

        if (newstyle && (tblflag || cmd->tflag)) {
                warnx("cannot use table flags with newstyle");
                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)) {
                warnx("\"infile\" is required for template generation flags");
                return (0);
        } if (nflags > 1) {
                warnx("cannot have more than one file generation flag");
                return (0);
        }
        return (1);
}

static void
usage(void)
{
        f_print(stderr, "%s\n%s\n%s\n%s\n%s\n",
                "usage: rpcgen infile",
                "       rpcgen [-abCLNTM] [-Dname[=value]] [-i size]\
[-I -P [-K seconds]] [-Y path] infile",
                "       rpcgen [-c | -h | -l | -m | -t | -Sc | -Ss | -Sm]\
[-o outfile] [infile]",
                "       rpcgen [-s nettype]* [-o outfile] [infile]",
                "       rpcgen [-n netid]* [-o outfile] [infile]");
        options_usage();
        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, "-b\t\tbackward compatibility mode (generates code \
for FreeBSD 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\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, "-P\t\tgenerate code for port monitoring support in server\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, "-Y path\t\tpath where cpp is found\n");
        exit(1);
}