usr/src/lib/librpc/rpcgen/rpc_main.c

/* @(#)rpc_main.c       2.2 88/08/01 4.0 RPCSRC */
/*
 * 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
 */
#ifndef lint
static char sccsid[] = "@(#)rpc_main.c 1.7 87/06/24 (C) 1987 SMI";
#endif

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

#include <stdio.h>
#include <strings.h>
#include <sys/file.h>
#include "rpc_util.h"
#include "rpc_parse.h"
#include "rpc_scan.h"

#define EXTEND  1               /* alias for TRUE */

struct commandline {
        int cflag;
        int hflag;
        int lflag;
        int sflag;
        int mflag;
        char *infile;
        char *outfile;
};

static char *cmdname;
static char CPP[] = "/lib/cpp";
static char CPPFLAGS[] = "-C";
static char *allv[] = {
        "rpcgen", "-s", "udp", "-s", "tcp",
};
static int allc = sizeof(allv)/sizeof(allv[0]);

main(argc, argv)
        int argc;
        char *argv[];

{
        struct commandline cmd;

        if (!parseargs(argc, argv, &cmd)) {
                f_print(stderr,
                        "usage: %s infile\n", cmdname);
                f_print(stderr,
                        "       %s [-c | -h | -l | -m] [-o outfile] [infile]\n",
                        cmdname);
                f_print(stderr,
                        "       %s [-s udp|tcp]* [-o outfile] [infile]\n",
                        cmdname);
                exit(1);
        }
        if (cmd.cflag) {
                c_output(cmd.infile, "-DRPC_XDR", !EXTEND, cmd.outfile);
        } else if (cmd.hflag) {
                h_output(cmd.infile, "-DRPC_HDR", !EXTEND, cmd.outfile);
        } else if (cmd.lflag) {
                l_output(cmd.infile, "-DRPC_CLNT", !EXTEND, cmd.outfile);
        } else if (cmd.sflag || cmd.mflag) {
                s_output(argc, argv, cmd.infile, "-DRPC_SVC", !EXTEND,
                         cmd.outfile, cmd.mflag);
        } else {
                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();
                s_output(allc, allv, cmd.infile, "-DRPC_SVC", EXTEND,
                         "_svc.c", cmd.mflag);
        }
        exit(0);
}

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

        res = alloc(strlen(file) + strlen(ext) + 1);
        if (res == NULL) {
                abort();
        }
        p = rindex(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
open_output(infile, outfile)
        char *infile;
        char *outfile;
{
        if (outfile == NULL) {
                fout = stdout;
                return;
        }
        if (infile != NULL && streq(outfile, infile)) {
                f_print(stderr, "%s: output would overwrite %s\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);
}

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

        infilename = (infile == NULL) ? "<stdin>" : infile;
        (void) pipe(pd);
        switch (fork()) {
        case 0:
                (void) close(1);
                (void) dup2(pd[1], 1);
                (void) close(pd[0]);
                execl(CPP, CPP, CPPFLAGS, define, infile, NULL);
                perror("execl");
                exit(1);
        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();
        }
}

/*
 * Compile into an XDR routine output file
 */
static
c_output(infile, define, extend, outfile)
        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;
        open_output(infile, outfilename);
        f_print(fout, "#include <rpc/rpc.h>\n");
        if (infile && (include = extendfile(infile, ".h"))) {
                f_print(fout, "#include \"%s\"\n", include);
                free(include);
        }
        tell = ftell(fout);
        while (def = get_definition()) {
                emit(def);
        }
        if (extend && tell == ftell(fout)) {
                (void) unlink(outfilename);
        }
}

/*
 * Compile into an XDR header file
 */
static
h_output(infile, define, extend, outfile)
        char *infile;
        char *define;
        int extend;
        char *outfile;
{
        definition *def;
        char *outfilename;
        long tell;

        open_input(infile, define);
        outfilename =  extend ? extendfile(infile, outfile) : outfile;
        open_output(infile, outfilename);
        tell = ftell(fout);
        while (def = get_definition()) {
                print_datadef(def);
        }
        if (extend && tell == ftell(fout)) {
                (void) unlink(outfilename);
        }
}

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

        open_input(infile, define);
        outfilename = extend ? extendfile(infile, outfile) : outfile;
        open_output(infile, outfilename);
        f_print(fout, "#include <stdio.h>\n");
        f_print(fout, "#include <rpc/rpc.h>\n");
        if (infile && (include = extendfile(infile, ".h"))) {
                f_print(fout, "#include \"%s\"\n", include);
                free(include);
        }
        foundprogram = 0;
        while (def = get_definition()) {
                foundprogram |= (def->def_kind == DEF_PROGRAM);
        }
        if (extend && !foundprogram) {
                (void) unlink(outfilename);
                return;
        }
        if (nomain) {
                write_programs((char *)NULL);
        } else {
                write_most();
                do_registers(argc, argv);
                write_rest();
                write_programs("static");
        }
}

static
l_output(infile, define, extend, outfile)
        char *infile;
        char *define;
        int extend;
        char *outfile;
{
        char *include;
        definition *def;
        int foundprogram;
        char *outfilename;

        open_input(infile, define);
        outfilename = extend ? extendfile(infile, outfile) : outfile;
        open_output(infile, outfilename);
        f_print(fout, "#include <rpc/rpc.h>\n");
        if (infile && (include = extendfile(infile, ".h"))) {
                f_print(fout, "#include \"%s\"\n", include);
                free(include);
        }
        foundprogram = 0;
        while (def = get_definition()) {
                foundprogram |= (def->def_kind == DEF_PROGRAM);
        }
        if (extend && !foundprogram) {
                (void) unlink(outfilename);
                return;
        }
        write_stubs();
}

/*
 * Perform registrations for service output
 */
static
do_registers(argc, argv)
        int argc;
        char *argv[];

{
        int i;

        for (i = 1; i < argc; i++) {
                if (streq(argv[i], "-s")) {
                        write_register(argv[i + 1]);
                        i++;
                }
        }
}

/*
 * Parse command line arguments
 */
static
parseargs(argc, argv, cmd)
        int argc;
        char *argv[];
        struct commandline *cmd;

{
        int i;
        int j;
        char c;
        char flag[(1 << 8 * sizeof(char))];
        int nflags;

        cmdname = argv[0];
        cmd->infile = cmd->outfile = NULL;
        if (argc < 2) {
                return (0);
        }
        flag['c'] = 0;
        flag['h'] = 0;
        flag['s'] = 0;
        flag['o'] = 0;
        flag['l'] = 0;
        flag['m'] = 0;
        for (i = 1; i < argc; i++) {
                if (argv[i][0] != '-') {
                        if (cmd->infile) {
                                return (0);
                        }
                        cmd->infile = argv[i];
                } else {
                        for (j = 1; argv[i][j] != 0; j++) {
                                c = argv[i][j];
                                switch (c) {
                                case 'c':
                                case 'h':
                                case 'l':
                                case 'm':
                                        if (flag[c]) {
                                                return (0);
                                        }
                                        flag[c] = 1;
                                        break;
                                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 == 's') {
                                                if (!streq(argv[i], "udp") &&
                                                    !streq(argv[i], "tcp")) {
                                                        return (0);
                                                }
                                        } else if (c == 'o') {
                                                if (cmd->outfile) {
                                                        return (0);
                                                }
                                                cmd->outfile = argv[i];
                                        }
                                        goto nextarg;

                                default:
                                        return (0);
                                }
                        }
        nextarg:
                        ;
                }
        }
        cmd->cflag = flag['c'];
        cmd->hflag = flag['h'];
        cmd->sflag = flag['s'];
        cmd->lflag = flag['l'];
        cmd->mflag = flag['m'];
        nflags = cmd->cflag + cmd->hflag + cmd->sflag + cmd->lflag + cmd->mflag;
        if (nflags == 0) {
                if (cmd->outfile != NULL || cmd->infile == NULL) {
                        return (0);
                }
        } else if (nflags > 1) {
                return (0);
        }
        return (1);
}