root/usr/src/cmd/cmd-inet/usr.bin/ftp/cmds.c
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 *      Copyright 2006 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.
 */

/*
 * FTP User Program -- Command Routines.
 */
#define FTP_NAMES
#include "ftp_var.h"

FILE    *tmp_nlst = NULL;       /* tmp file; holds NLST results for mget, etc */

static char *mname;
static jmp_buf jabort;
static jmp_buf abortprox;

static char *remglob(char *argv[], int doswitch);
static char *onoff(int bool);
static int confirm(char *cmd, char *file);
static int globulize(char **cpp);
static void proxabort(int sig);
static void mabort(int sig);
static char *dotrans(char *name);
static char *domap(char *name);
static void getit(int argc, char *argv[], int restartit, char *mode);

static char *getlevel(int);

/* Prompt for command argument, add to buffer with space separator */
static int
prompt_for_arg(char *buffer, int buffer_size, char *prompt)
{
        if (strlen(buffer) > buffer_size - 2) {
                (void) printf("Line too long\n");
                return (-1);
        }
        strcat(buffer, " ");
        stop_timer();
        (void) printf("(%s) ", prompt);
        if (fgets(buffer + strlen(buffer), buffer_size - strlen(buffer), stdin)
            == NULL) {
                reset_timer();
                return (-1);
        }

        /* Flush what didn't fit in the buffer */
        if (buffer[strlen(buffer)-1] != '\n') {
                while (fgetc(stdin) != '\n' && !ferror(stdin) && !feof(stdin))
                        ;
                (void) printf("Line too long\n");
                reset_timer();
                return (-1);
        } else
                buffer[strlen(buffer)-1] = 0;

        reset_timer();
        return (0);
}


/*
 * Connect to peer server and
 * auto-login, if possible.
 */
void
setpeer(int argc, char *argv[])
{
        char *host;

        if (connected) {
                (void) printf("Already connected to %s, use close first.\n",
                        hostname);
                code = -1;
                return;
        }
        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "to") == -1) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc > 3 || argc < 2) {
                (void) printf("usage: %s host-name [port]\n", argv[0]);
                code = -1;
                return;
        }
        strcpy(typename, "ascii");
        host = hookup(argv[1], (argc > 2 ? argv[2] : "ftp"));
        if (host) {
                int overbose;
                extern char reply_string[];

                connected = 1;
                /*
                 * Set up defaults for FTP.
                 */
                clevel = dlevel = PROT_C;
                if (autoauth) {
                        if (do_auth() && autoencrypt) {
                            clevel = PROT_P;
                            setpbsz(1<<20);
                            if (command("PROT P") == COMPLETE)
                                dlevel = PROT_P;
                            else {
                                (void) fprintf(stderr,
                                        "%s: couldn't enable encryption\n",
                                        argv[0]);
                                /* unable to encrypt command channel, too! */
                                dlevel = clevel = PROT_C;
                            }
                        }
                        if ((auth_type != AUTHTYPE_NONE) && (clevel == PROT_C))
                                clevel = PROT_S;
                }

                if (autologin)
                        (void) login(argv[1]);
                /* if skipsyst is enabled, then don't send SYST command */
                if (skipsyst)
                        return;

                overbose = verbose;
                if (debug == 0)
                        verbose = -1;
                if (command("SYST") == COMPLETE && overbose) {
                        char *cp, c;

                        cp = index(reply_string+4, ' ');
                        if (cp == NULL)
                                cp = index(reply_string+4, '\r');
                        if (cp) {
                                if (cp[-1] == '.')
                                        cp--;
                                c = *cp;
                                *cp = '\0';
                        }

                        (void) printf("Remote system type is %s.\n",
                                reply_string+4);
                        if (cp)
                                *cp = c;
                }
                if (strncmp(reply_string, "215 UNIX Type: L8", 17) == 0) {
                        setbinary(0, NULL);
                        if (overbose)
                                (void) printf(
                                    "Using %s mode to transfer files.\n",
                                    typename);
                } else if (overbose &&
                    strncmp(reply_string, "215 TOPS20", 10) == 0) {
                        (void) printf(
                            "Remember to set tenex mode when transfering "
                            "binary files from this machine.\n");
                }
                verbose = overbose;
        }
}

static struct types {
        char    *t_name;
        char    *t_mode;
        int     t_type;
        char    *t_arg;
} types[] = {
        { "ascii",      "A",    TYPE_A, 0 },
        { "binary",     "I",    TYPE_I, 0 },
        { "image",      "I",    TYPE_I, 0 },
        { "ebcdic",     "E",    TYPE_E, 0 },
        { "tenex",      "L",    TYPE_L, bytename },
        0
};

/*
 * Set transfer type.
 */
void
settype(int argc, char *argv[])
{
        struct types *p;
        int comret;

        if (argc > 2) {
                char *sep;

                (void) printf("usage: %s [", argv[0]);
                sep = " ";
                for (p = types; p->t_name; p++) {
                        (void) printf("%s%s", sep, p->t_name);
                        if (*sep == ' ')
                                sep = " | ";
                }
                (void) printf(" ]\n");
                code = -1;
                return;
        }
        if (argc < 2) {
                (void) printf("Using %s mode to transfer files.\n", typename);
                code = 0;
                return;
        }
        for (p = types; p->t_name; p++)
                if (strcmp(argv[1], p->t_name) == 0)
                        break;
        if (p->t_name == 0) {
                (void) printf("%s: unknown mode\n", argv[1]);
                code = -1;
                return;
        }
        if ((p->t_arg != NULL) && (*(p->t_arg) != '\0'))
                comret = command("TYPE %s %s", p->t_mode, p->t_arg);
        else
                comret = command("TYPE %s", p->t_mode);
        if (comret == COMPLETE) {
                (void) strcpy(typename, p->t_name);
                type = p->t_type;
        }
}

/*
 * Set binary transfer type.
 */
/*ARGSUSED*/
void
setbinary(int argc, char *argv[])
{
        call(settype, "type", "binary", 0);
}

/*
 * Set ascii transfer type.
 */
/*ARGSUSED*/
void
setascii(int argc, char *argv[])
{
        call(settype, "type", "ascii", 0);
}

/*
 * Set tenex transfer type.
 */
/*ARGSUSED*/
void
settenex(int argc, char *argv[])
{
        call(settype, "type", "tenex", 0);
}

/*
 * Set ebcdic transfer type.
 */
/*ARGSUSED*/
void
setebcdic(int argc, char *argv[])
{
        call(settype, "type", "ebcdic", 0);
}

/*
 * Set file transfer mode.
 */
/*ARGSUSED*/
void
setmode(int argc, char *argv[])
{
        (void) printf("We only support %s mode, sorry.\n", modename);
        code = -1;
}

/*
 * Set file transfer format.
 */
/*ARGSUSED*/
void
setform(int argc, char *argv[])
{
        (void) printf("We only support %s format, sorry.\n", formname);
        code = -1;
}

/*
 * Set file transfer structure.
 */
/*ARGSUSED*/
void
setstruct(int argc, char *argv[])
{

        (void) printf("We only support %s structure, sorry.\n", structname);
        code = -1;
}

/*
 * Send a single file.
 */
void
put(int argc, char *argv[])
{
        char *cmd;
        int loc = 0;
        char *oldargv1;

        if (argc == 2) {
                argc++;
                argv[2] = argv[1];
                loc++;
        }
        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "local-file") == -1) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 2) {
usage:
                (void) printf("usage: %s local-file remote-file\n", argv[0]);
                code = -1;
                return;
        }
        if (argc < 3) {
                if (prompt_for_arg(line, sizeof (line), "remote-file") == -1) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 3)
                goto usage;
        oldargv1 = argv[1];
        if (!globulize(&argv[1])) {
                code = -1;
                return;
        }
        /*
         * If "globulize" modifies argv[1], and argv[2] is a copy of
         * the old argv[1], make it a copy of the new argv[1].
         */
        if (argv[1] != oldargv1 && argv[2] == oldargv1) {
                argv[2] = argv[1];
        }
        cmd = (argv[0][0] == 'a') ? "APPE" : ((sunique) ? "STOU" : "STOR");
        if (loc && ntflag) {
                argv[2] = dotrans(argv[2]);
        }
        if (loc && mapflag) {
                argv[2] = domap(argv[2]);
        }
        sendrequest(cmd, argv[1], argv[2], 1);
}

/*ARGSUSED*/
static void
mabort(int sig)
{
        int ointer;

        (void) printf("\n");
        (void) fflush(stdout);
        if (mflag && fromatty) {
                ointer = interactive;
                interactive = 1;
                if (confirm("Continue with", mname)) {
                        interactive = ointer;
                        longjmp(jabort, 0);
                }
                interactive = ointer;
        }
        mflag = 0;
        longjmp(jabort, 0);
}

/*
 * Send multiple files.
 */
void
mput(int argc, char *argv[])
{
        int i;
        int ointer;
        void (*oldintr)();
        char *tp;
        int     len;

        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "local-files") == -1) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 2) {
                (void) printf("usage: %s local-files\n", argv[0]);
                code = -1;
                return;
        }
        mname = argv[0];
        mflag = 1;
        oldintr = signal(SIGINT, mabort);
        (void) setjmp(jabort);
        if (proxy) {
                char *cp, *tp2, tmpbuf[MAXPATHLEN];

                while ((cp = remglob(argv, 0)) != NULL) {
                        if (*cp == 0) {
                                mflag = 0;
                                continue;
                        }
                        if (mflag && confirm(argv[0], cp)) {
                                tp = cp;
                                if (mcase) {
                                        while (*tp) {
                                                if ((len =
                                                    mblen(tp, MB_CUR_MAX)) <= 0)
                                                        len = 1;
                                                if (islower(*tp))
                                                        break;
                                                tp += len;
                                        }
                                        if (!*tp) {
                                                tp = cp;
                                                tp2 = tmpbuf;
                                                while (*tp) {
                                                        if ((len = mblen(tp,
                                                            MB_CUR_MAX)) <= 0)
                                                                len = 1;
                                                        memcpy(tp2, tp, len);
                                                        if (isupper(*tp2)) {
                                                                *tp2 = 'a' +
                                                                    *tp2 - 'A';
                                                        }
                                                        tp += len;
                                                        tp2 += len;
                                                }
                                                *tp2 = 0;
                                                tp = tmpbuf;
                                        }
                                }
                                if (ntflag) {
                                        tp = dotrans(tp);
                                }
                                if (mapflag) {
                                        tp = domap(tp);
                                }
                                sendrequest((sunique) ? "STOU" : "STOR",
                                    cp, tp, 0);
                                if (!mflag && fromatty) {
                                        ointer = interactive;
                                        interactive = 1;
                                        if (confirm("Continue with", "mput")) {
                                                mflag++;
                                        }
                                        interactive = ointer;
                                }
                        }
                }
                (void) signal(SIGINT, oldintr);
                mflag = 0;
                return;
        }
        for (i = 1; i < argc; i++) {
                char **cpp, **gargs;

                if (!doglob) {
                        if (mflag && confirm(argv[0], argv[i])) {
                                tp = (ntflag) ? dotrans(argv[i]) : argv[i];
                                tp = (mapflag) ? domap(tp) : tp;
                                sendrequest((sunique) ? "STOU" : "STOR",
                                    argv[i], tp, 1);
                                if (!mflag && fromatty) {
                                        ointer = interactive;
                                        interactive = 1;
                                        if (confirm("Continue with", "mput")) {
                                                mflag++;
                                        }
                                        interactive = ointer;
                                }
                        }
                        continue;
                }
                gargs = glob(argv[i]);
                if (globerr != NULL) {
                        (void) printf("%s\n", globerr);
                        if (gargs)
                                blkfree(gargs);
                        continue;
                }
                for (cpp = gargs; cpp && *cpp != NULL; cpp++) {
                        if (mflag && confirm(argv[0], *cpp)) {
                                tp = (ntflag) ? dotrans(*cpp) : *cpp;
                                tp = (mapflag) ? domap(tp) : tp;
                                sendrequest((sunique) ? "STOU" : "STOR",
                                    *cpp, tp, 0);
                                if (!mflag && fromatty) {
                                        ointer = interactive;
                                        interactive = 1;
                                        if (confirm("Continue with", "mput")) {
                                                mflag++;
                                        }
                                        interactive = ointer;
                                }
                        }
                }
                if (gargs != NULL)
                        blkfree(gargs);
        }
        (void) signal(SIGINT, oldintr);
        mflag = 0;
}

/*
 * Restart transfer at a specific offset.
 */
void
restart(int argc, char *argv[])
{
        off_t orestart_point = restart_point;

        if (argc > 2) {
                (void) printf("usage: %s [marker]\n", argv[0]);
                code = -1;
                return;
        }
        if (argc == 2) {
                longlong_t rp;
                char *endp;

                errno = 0;
                rp = strtoll(argv[1], &endp, 10);
                if (errno || rp < 0 || *endp != '\0')
                        (void) printf("%s: Invalid offset `%s'\n",
                                argv[0], argv[1]);
                else
                        restart_point = rp;
        }
        if (restart_point == 0) {
                if (orestart_point == 0)
                        (void) printf("No restart marker defined\n");
                else
                        (void) printf("Restart marker cleared\n");
        } else
                (void) printf(
                        "Restarting at %lld for next get, put or append\n",
                        (longlong_t)restart_point);
}

void
reget(int argc, char *argv[])
{
        getit(argc, argv, 1, "r+w");
}

void
get(int argc, char *argv[])
{
        getit(argc, argv, 0, restart_point ? "r+w" : "w");
}

/*
 * Receive one file.
 */
static void
getit(int argc, char *argv[], int restartit, char *mode)
{
        int loc = 0;
        int len;
        int allowpipe = 1;

        if (argc == 2) {
                argc++;
                argv[2] = argv[1];
                /* Only permit !file if two arguments. */
                allowpipe = 0;
                loc++;
        }
        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "remote-file") == -1) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 2) {
usage:
                (void) printf("usage: %s remote-file [ local-file ]\n",
                        argv[0]);
                code = -1;
                return;
        }
        if (argc < 3) {
                if (prompt_for_arg(line, sizeof (line), "local-file") == -1) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 3)
                goto usage;
        if (!globulize(&argv[2])) {
                code = -1;
                return;
        }
        if (loc && mcase) {
                char *tp = argv[1], *tp2, tmpbuf[MAXPATHLEN];

                while (*tp) {
                        if ((len = mblen(tp, MB_CUR_MAX)) <= 0)
                                len = 1;
                        if (islower(*tp))
                                break;
                        tp += len;
                }
                if (!*tp) {
                        tp = argv[2];
                        tp2 = tmpbuf;
                        while (*tp) {
                                if ((len = mblen(tp, MB_CUR_MAX)) <= 0)
                                        len = 1;
                                memcpy(tp2, tp, len);
                                if (isupper(*tp2))
                                        *tp2 = 'a' + *tp2 - 'A';
                                tp += len;
                                tp2 += len;
                        }
                        *tp2 = 0;
                        argv[2] = tmpbuf;
                }
        }
        if (loc && ntflag) {
                argv[2] = dotrans(argv[2]);
        }
        if (loc && mapflag) {
                argv[2] = domap(argv[2]);
        }
        if (restartit) {
                struct stat stbuf;

                if (stat(argv[2], &stbuf) < 0) {
                        perror(argv[2]);
                        code = -1;
                        return;
                }
                restart_point = stbuf.st_size;
        }
        recvrequest("RETR", argv[2], argv[1], mode, allowpipe);
        restart_point = 0;
}

/*
 * Get multiple files.
 */
void
mget(int argc, char *argv[])
{
        char *cp, *tp, *tp2, tmpbuf[MAXPATHLEN];
        int ointer;
        void (*oldintr)();
        int need_convert;
        int     len;

        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "remote-files") < 0) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 2) {
                (void) printf("usage: %s remote-files\n", argv[0]);
                code = -1;
                return;
        }
        mname = argv[0];
        mflag = 1;
        oldintr = signal(SIGINT, mabort);
        (void) setjmp(jabort);
        while ((cp = remglob(argv, proxy)) != NULL) {
                if (*cp == '\0') {
                        mflag = 0;
                        continue;
                }
                if (mflag && confirm(argv[0], cp)) {
                        strcpy(tmpbuf, cp);
                        tp =  tmpbuf;
                        need_convert = 1;
                        if (mcase) {
                                tp2 = tp;
                                while (*tp2 && need_convert) {
                                /* Need any case convert? */
                                        if (islower(*tp2))
                                                need_convert = 0;
                                        if ((len = mblen(tp2, MB_CUR_MAX)) <= 0)
                                                len = 1;
                                        tp2 += len;
                                }
                                tp2 = tp;
                                while (need_convert && *tp2) {
                                /* Convert to lower case */
                                        if (isupper(*tp2))
                                                *tp2 = tolower(*tp2);
                                        if ((len = mblen(tp2, MB_CUR_MAX)) <= 0)
                                                len = 1;
                                        tp2 += len;
                                }
                        }

                        if (ntflag) {
                                tp = dotrans(tp);
                        }
                        if (mapflag) {
                                tp = domap(tp);
                        }
                        recvrequest("RETR", tp, cp, "w", 0);
                        restart_point = 0;
                        if (!mflag && fromatty) {
                                ointer = interactive;
                                interactive = 1;
                                if (confirm("Continue with", "mget")) {
                                        mflag++;
                                }
                                interactive = ointer;
                        }
                }
        }
        (void) signal(SIGINT, oldintr);
        mflag = 0;
}

static char *
remglob(char *argv[], int doswitch)
{
        static char buf[MAXPATHLEN];
        static char **args;
        int oldverbose, oldhash;
        char *cp;

        if (!mflag) {
                if (!doglob) {
                        args = NULL;
                } else {
                        if (tmp_nlst != NULL) {
                                (void) fclose(tmp_nlst);
                                tmp_nlst = NULL;
                        }
                }
                return (NULL);
        }
        if (!doglob) {
                if (args == NULL)
                        args = argv;
                if ((cp = *++args) == NULL)
                        args = NULL;
                return (cp);
        }
        if (tmp_nlst == NULL) {
                if ((tmp_nlst = tmpfile()) == NULL) {
                        (void) printf("%s\n", strerror(errno));
                        return (NULL);
                }
                oldverbose = verbose, verbose = 0;
                oldhash = hash, hash = 0;
                if (doswitch) {
                        pswitch(!proxy);
                }
                for (; *++argv != NULL; )
                        recvrequest("NLST", NULL, *argv, "", 0);
                rewind(tmp_nlst);
                if (doswitch) {
                        pswitch(!proxy);
                }
                verbose = oldverbose; hash = oldhash;
        }
        reset_timer();
        if (fgets(buf, sizeof (buf), tmp_nlst) == NULL) {
                (void) fclose(tmp_nlst), tmp_nlst = NULL;
                return (NULL);
        }
        if ((cp = index(buf, '\n')) != NULL)
                *cp = '\0';
        return (buf);
}

static char *
onoff(int bool)
{
        return (bool ? "on" : "off");
}

/*
 * Show status.
 */
/*ARGSUSED*/
void
status(int argc, char *argv[])
{
        int i;
        char *levelp;

        if (connected)
                (void) printf("Connected to %s.\n", hostname);
        else
                (void) printf("Not connected.\n");
        if (!proxy) {
                pswitch(1);
                if (connected) {
                        (void) printf("Connected for proxy commands to %s.\n",
                            hostname);
                } else {
                        (void) printf("No proxy connection.\n");
                }
                pswitch(0);
        }

        if (auth_type != AUTHTYPE_NONE)
                (void) printf("Authentication type: %s\n",
                        GSS_AUTHTYPE_NAME(auth_type));
        else
                (void) printf("Not authenticated.\n");
        (void) printf("Mechanism: %s\n", mechstr);
        (void) printf("Autoauth: %s; Autologin: %s\n",
                onoff(autoauth), onoff(autologin));
        levelp = getlevel(clevel);
        (void) printf("Control Channel Protection Level: %s\n",
                levelp ? levelp : "<unknown>");
        levelp = getlevel(dlevel);
        (void) printf("Data Channel Protection Level: %s\n",
                levelp ? levelp : "<unknown>");

        (void) printf("Passive mode: %s.\n", onoff(passivemode));
        (void) printf("Mode: %s; Type: %s; Form: %s; Structure: %s\n",
                modename, typename, formname, structname);
        (void) printf("Verbose: %s; Bell: %s; Prompting: %s; Globbing: %s\n",
                onoff(verbose), onoff(bell), onoff(interactive),
                onoff(doglob));
        (void) printf("Store unique: %s; Receive unique: %s\n", onoff(sunique),
                onoff(runique));
        (void) printf("Case: %s; CR stripping: %s\n",
                onoff(mcase), onoff(crflag));
        if (ntflag) {
                (void) printf("Ntrans: (in) %s (out) %s\n", ntin, ntout);
        } else {
                (void) printf("Ntrans: off\n");
        }
        if (mapflag) {
                (void) printf("Nmap: (in) %s (out) %s\n", mapin, mapout);
        } else {
                (void) printf("Nmap: off\n");
        }
        (void) printf("Hash mark printing: %s; Use of PORT cmds: %s\n",
                onoff(hash), onoff(sendport));
        if (macnum > 0) {
                (void) printf("Macros:\n");
                for (i = 0; i < macnum; i++) {
                        (void) printf("\t%s\n", macros[i].mac_name);
                }
        }
        code = 0;
}

/*
 * Set beep on cmd completed mode.
 */
/*ARGSUSED*/
void
setbell(int argc, char *argv[])
{
        bell = !bell;
        (void) printf("Bell mode %s.\n", onoff(bell));
        code = bell;
}

/*
 * Turn on packet tracing.
 */
/*ARGSUSED*/
void
settrace(int argc, char *argv[])
{
        trace = !trace;
        (void) printf("Packet tracing %s.\n", onoff(trace));
        code = trace;
}

/*
 * Toggle hash mark printing during transfers.
 */
/*ARGSUSED*/
void
sethash(int argc, char *argv[])
{
        hash = !hash;
        (void) printf("Hash mark printing %s", onoff(hash));
        code = hash;
        if (hash)
                (void) printf(" (%d bytes/hash mark)", HASHSIZ);
        (void) printf(".\n");
}

/*
 * Turn on printing of server echo's.
 */
/*ARGSUSED*/
void
setverbose(int argc, char *argv[])
{
        verbose = !verbose;
        (void) printf("Verbose mode %s.\n", onoff(verbose));
        code = verbose;
}

/*
 * Toggle PORT cmd use before each data connection.
 */
/*ARGSUSED*/
void
setport(int argc, char *argv[])
{
        sendport = !sendport;
        (void) printf("Use of PORT cmds %s.\n", onoff(sendport));
        code = sendport;
}

/*
 * Turn on interactive prompting
 * during mget, mput, and mdelete.
 */
/*ARGSUSED*/
void
setprompt(int argc, char *argv[])
{
        interactive = !interactive;
        (void) printf("Interactive mode %s.\n", onoff(interactive));
        code = interactive;
}

/*
 * Toggle metacharacter interpretation
 * on local file names.
 */
/*ARGSUSED*/
void
setglob(int argc, char *argv[])
{
        doglob = !doglob;
        (void) printf("Globbing %s.\n", onoff(doglob));
        code = doglob;
}

/*
 * Set debugging mode on/off and/or
 * set level of debugging.
 */
void
setdebug(int argc, char *argv[])
{
        int val;

        if (argc > 1) {
                val = atoi(argv[1]);
                if (val < 0) {
                        (void) printf("%s: bad debugging value.\n", argv[1]);
                        code = -1;
                        return;
                }
        } else
                val = !debug;
        debug = val;
        if (debug)
                options |= SO_DEBUG;
        else
                options &= ~SO_DEBUG;
        (void) printf("Debugging %s (debug=%d).\n", onoff(debug), debug);
        code = debug > 0;
}

/*
 * Set current working directory
 * on remote machine.
 */
void
cd(int argc, char *argv[])
{
        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "remote-directory") <
                    0) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 2) {
                (void) printf("usage: %s remote-directory\n", argv[0]);
                code = -1;
                return;
        }
        (void) command("CWD %s", argv[1]);
}

/*
 * Set current working directory
 * on local machine.
 */
void
lcd(int argc, char *argv[])
{
        char buf[MAXPATHLEN], *bufptr;

        if (argc < 2)
                argc++, argv[1] = home;
        if (argc != 2) {
                (void) printf("usage: %s local-directory\n", argv[0]);
                code = -1;
                return;
        }
        if (!globulize(&argv[1])) {
                code = -1;
                return;
        }
        if (chdir(argv[1]) < 0) {
                perror(argv[1]);
                code = -1;
                return;
        }
        bufptr = getcwd(buf, MAXPATHLEN);
        /*
         * Even though chdir may succeed, getcwd may fail if a component
         * of the pwd is unreadable. In this case, print the argument to
         * chdir as the resultant directory, since we know it succeeded above.
         */
        (void) printf("Local directory now %s\n", (bufptr ? bufptr : argv[1]));
        code = 0;
}

/*
 * Delete a single file.
 */
void
delete(int argc, char *argv[])
{

        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "remote-file") < 0) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 2) {
                (void) printf("usage: %s remote-file\n", argv[0]);
                code = -1;
                return;
        }
        (void) command("DELE %s", argv[1]);
}

/*
 * Delete multiple files.
 */
void
mdelete(int argc, char *argv[])
{
        char *cp;
        int ointer;
        void (*oldintr)();

        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "remote-files") < 0) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 2) {
                (void) printf("usage: %s remote-files\n", argv[0]);
                code = -1;
                return;
        }
        mname = argv[0];
        mflag = 1;
        oldintr = signal(SIGINT, mabort);
        (void) setjmp(jabort);
        while ((cp = remglob(argv, 0)) != NULL) {
                if (*cp == '\0') {
                        mflag = 0;
                        continue;
                }
                if (mflag && confirm(argv[0], cp)) {
                        (void) command("DELE %s", cp);
                        if (!mflag && fromatty) {
                                ointer = interactive;
                                interactive = 1;
                                if (confirm("Continue with", "mdelete")) {
                                        mflag++;
                                }
                                interactive = ointer;
                        }
                }
        }
        (void) signal(SIGINT, oldintr);
        mflag = 0;
}

/*
 * Rename a remote file.
 */
void
renamefile(int argc, char *argv[])
{

        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "from-name") < 0) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 2) {
usage:
                (void) printf("%s from-name to-name\n", argv[0]);
                code = -1;
                return;
        }
        if (argc < 3) {
                if (prompt_for_arg(line, sizeof (line), "to-name") < 0) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 3)
                goto usage;
        if (command("RNFR %s", argv[1]) == CONTINUE)
                (void) command("RNTO %s", argv[2]);
}

/*
 * Get a directory listing
 * of remote files.
 */
void
ls(int argc, char *argv[])
{
        char *cmd;

        if (argc < 2)
                argc++, argv[1] = NULL;
        if (argc < 3)
                argc++, argv[2] = "-";
        if (argc > 3) {
                (void) printf("usage: %s remote-directory local-file\n",
                        argv[0]);
                code = -1;
                return;
        }
        if (ls_invokes_NLST) {
                cmd = ((argv[0][0] == 'l' || argv[0][0] == 'n') ?
                    "NLST" : "LIST");
        } else {
                cmd = ((argv[0][0] == 'n') ? "NLST" : "LIST");
        }
        if (strcmp(argv[2], "-") && !globulize(&argv[2])) {
                code = -1;
                return;
        }
        recvrequest(cmd, argv[2], argv[1], "w", 1);
}

/*
 * Get a directory listing
 * of multiple remote files.
 */
void
mls(int argc, char *argv[])
{
        char *cmd, mode[1], *dest;
        int ointer, i;
        void (*oldintr)();

        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "remote-files") < 0) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 3) {
                if (prompt_for_arg(line, sizeof (line), "local-file") < 0) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 3) {
                (void) printf("usage: %s remote-files local-file\n", argv[0]);
                code = -1;
                return;
        }
        dest = argv[argc - 1];
        argv[argc - 1] = NULL;
        if (strcmp(dest, "-") && *dest != '|')
                if (!globulize(&dest) ||
                    !confirm("output to local-file:", dest)) {
                        code = -1;
                        return;
                }
        cmd = argv[0][1] == 'l' ? "NLST" : "LIST";
        mname = argv[0];
        mflag = 1;
        oldintr = signal(SIGINT, mabort);
        (void) setjmp(jabort);
        for (i = 1; mflag && i < argc-1; ++i) {
                *mode = (i == 1) ? 'w' : 'a';
                recvrequest(cmd, dest, argv[i], mode, 1);
                if (!mflag && fromatty) {
                        ointer = interactive;
                        interactive = 1;
                        if (confirm("Continue with", argv[0])) {
                                mflag ++;
                        }
                        interactive = ointer;
                }
        }
        (void) signal(SIGINT, oldintr);
        mflag = 0;
}

/*
 * Do a shell escape
 */
/*ARGSUSED*/
void
shell(int argc, char *argv[])
{
        pid_t pid;
        void (*old1)(), (*old2)();
        char *shellstring, *namep;
        int status;

        stop_timer();
        old1 = signal(SIGINT, SIG_IGN);
        old2 = signal(SIGQUIT, SIG_IGN);
        if ((pid = fork()) == 0) {
                closefrom(STDERR_FILENO + 1);
                (void) signal(SIGINT, SIG_DFL);
                (void) signal(SIGQUIT, SIG_DFL);
                shellstring = getenv("SHELL");
                if (shellstring == NULL)
                        shellstring = "/bin/sh";
                namep = rindex(shellstring, '/');
                if (namep == NULL)
                        namep = shellstring;
                if (argc > 1) {
                        if (debug) {
                                (void) printf("%s -c %s\n", shellstring,
                                        altarg);
                                (void) fflush(stdout);
                        }
                        execl(shellstring, namep, "-c", altarg, (char *)0);
                } else {
                        if (debug) {
                                (void) printf("%s\n", shellstring);
                                (void) fflush(stdout);
                        }
                        execl(shellstring, namep, (char *)0);
                }
                perror(shellstring);
                code = -1;
                exit(1);
                }
        if (pid > 0)
                while (wait(&status) != pid)
                        ;
        (void) signal(SIGINT, old1);
        (void) signal(SIGQUIT, old2);
        reset_timer();
        if (pid == (pid_t)-1) {
                perror("Try again later");
                code = -1;
        } else {
                code = 0;
        }
}

/*
 * Send new user information (re-login)
 */
void
user(int argc, char *argv[])
{
        char acct[80];
        int n, aflag = 0;

        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "username") < 0) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc > 4) {
                (void) printf("usage: %s username [password] [account]\n",
                        argv[0]);
                code = -1;
                return;
        }
        if (argv[1] == 0) {
                (void) printf("access for user (nil) denied\n");
                code = -1;
                return;
        }
        n = command("USER %s", argv[1]);
        if (n == CONTINUE) {
                int oldclevel;
                if (argc < 3)
                        argv[2] = mygetpass("Password: "), argc++;
                if ((oldclevel = clevel) == PROT_S)
                        clevel = PROT_P;
                n = command("PASS %s", argv[2]);
                /* level may have changed */
                if (clevel == PROT_P)
                        clevel = oldclevel;
        }
        if (n == CONTINUE) {
                if (argc < 4) {
                        (void) printf("Account: "); (void) fflush(stdout);
                        stop_timer();
                        (void) fgets(acct, sizeof (acct) - 1, stdin);
                        reset_timer();
                        acct[strlen(acct) - 1] = '\0';
                        argv[3] = acct; argc++;
                }
                n = command("ACCT %s", argv[3]);
                aflag++;
        }
        if (n != COMPLETE) {
                (void) fprintf(stdout, "Login failed.\n");
                return;
        }
        if (!aflag && argc == 4) {
                (void) command("ACCT %s", argv[3]);
        }
}

/*
 * Print working directory.
 */
/*ARGSUSED*/
void
pwd(int argc, char *argv[])
{
        (void) command("PWD");
}

/*
 * Make a directory.
 */
void
makedir(int argc, char *argv[])
{
        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "directory-name") <
                    0) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 2) {
                (void) printf("usage: %s directory-name\n", argv[0]);
                code = -1;
                return;
        }
        (void) command("MKD %s", argv[1]);
}

/*
 * Remove a directory.
 */
void
removedir(int argc, char *argv[])
{
        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "directory-name") <
                    0) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 2) {
                (void) printf("usage: %s directory-name\n", argv[0]);
                code = -1;
                return;
        }
        (void) command("RMD %s", argv[1]);
}

/*
 * Send a line, verbatim, to the remote machine.
 */
void
quote(int argc, char *argv[])
{
        int i, n, len;
        char buf[FTPBUFSIZ];

        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line),
                    "command line to send") == -1) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 2) {
                (void) printf("usage: %s line-to-send\n", argv[0]);
                code = -1;
                return;
        }
        len = snprintf(buf, sizeof (buf), "%s", argv[1]);
        if (len >= 0 && len < sizeof (buf) - 1) {
                for (i = 2; i < argc; i++) {
                        n = snprintf(&buf[len], sizeof (buf) - len, " %s",
                                        argv[i]);
                        if (n < 0 || n >= sizeof (buf) - len)
                                break;
                        len += n;
                }
        }
        if (command("%s", buf) == PRELIM) {
                while (getreply(0) == PRELIM)
                        ;
        }
}

/*
 * Send a line, verbatim, to the remote machine as a SITE command.
 */
void
site(int argc, char *argv[])
{
        int i, n, len;
        char buf[FTPBUFSIZ];

        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line),
                    "arguments to SITE command") == -1) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 2) {
                (void) printf("usage: %s arg1 [arg2] ...\n", argv[0]);
                code = -1;
                return;
        }
        len = snprintf(buf, sizeof (buf), "%s", argv[1]);
        if (len >= 0 && len < sizeof (buf) - 1) {
                for (i = 2; i < argc; i++) {
                        n = snprintf(&buf[len], sizeof (buf) - len, " %s",
                                        argv[i]);
                        if (n < 0 || n >= sizeof (buf) - len)
                                break;
                        len += n;
                }
        }
        if (command("SITE %s", buf) == PRELIM) {
                while (getreply(0) == PRELIM)
                        ;
        }
}

/*
 * Ask the other side for help.
 */
void
rmthelp(int argc, char *argv[])
{
        int oldverbose = verbose;

        verbose = 1;
        (void) command(argc == 1 ? "HELP" : "HELP %s", argv[1]);
        verbose = oldverbose;
}

/*
 * Terminate session and exit.
 */
/*ARGSUSED*/
void
quit(int argc, char *argv[])
{
        if (connected)
                disconnect(0, NULL);
        pswitch(1);
        if (connected) {
                disconnect(0, NULL);
        }
        exit(0);
}

/*
 * Terminate session, but don't exit.
 */
/*ARGSUSED*/
void
disconnect(int argc, char *argv[])
{
        extern FILE *ctrl_in, *ctrl_out;
        extern int data;

        if (!connected)
                return;
        (void) command("QUIT");
        if (ctrl_in) {
                reset_timer();
                (void) fclose(ctrl_in);
        }
        if (ctrl_out) {
                reset_timer();
                (void) fclose(ctrl_out);
        }
        ctrl_out = ctrl_in = NULL;
        connected = 0;
        data = -1;
        if (!proxy) {
                macnum = 0;
        }

        auth_type = AUTHTYPE_NONE;
        clevel = dlevel = PROT_C;
        goteof = 0;
}

static int
confirm(char *cmd, char *file)
{
        char line[FTPBUFSIZ];

        if (!interactive)
                return (1);
        stop_timer();
        (void) printf("%s %s? ", cmd, file);
        (void) fflush(stdout);
        *line = '\0';
        (void) fgets(line, sizeof (line), stdin);
        reset_timer();
        return (*line != 'n' && *line != 'N');
}

void
fatal(char *msg)
{
        (void) fprintf(stderr, "ftp: %s\n", msg);
        exit(1);
}

/*
 * Glob a local file name specification with
 * the expectation of a single return value.
 * Can't control multiple values being expanded
 * from the expression, we return only the first.
 */
static int
globulize(char **cpp)
{
        char **globbed;

        if (!doglob)
                return (1);
        globbed = glob(*cpp);
        if (globbed != NULL && *globbed == NULL && globerr == NULL)
                globerr = "No match";
        if (globerr != NULL) {
                (void) printf("%s: %s\n", *cpp, globerr);
                if (globbed)
                        blkfree(globbed);
                return (0);
        }
        if (globbed) {
                *cpp = strdup(*globbed);
                blkfree(globbed);
                if (!*cpp)
                        return (0);
        }
        return (1);
}

void
account(int argc, char *argv[])
{
        char acct[50], *ap;

        if (argc > 1) {
                ++argv;
                --argc;
                (void) strncpy(acct, *argv, 49);
                acct[49] = '\0';
                while (argc > 1) {
                        --argc;
                        ++argv;
                        (void) strncat(acct, *argv, 49 - strlen(acct));
                }
                ap = acct;
        } else {
                ap = mygetpass("Account:");
        }
        (void) command("ACCT %s", ap);
}

/*ARGSUSED*/
static void
proxabort(int sig)
{
        extern int proxy;

        if (!proxy) {
                pswitch(1);
        }
        if (connected) {
                proxflag = 1;
        } else {
                proxflag = 0;
        }
        pswitch(0);
        longjmp(abortprox, 1);
}

void
doproxy(int argc, char *argv[])
{
        void (*oldintr)();
        struct cmd *c;

        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "command") == -1) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 2) {
                (void) printf("usage: %s command\n", argv[0]);
                code = -1;
                return;
        }
        c = getcmd(argv[1]);
        if (c == (struct cmd *)-1) {
                (void) printf("?Ambiguous command\n");
                (void) fflush(stdout);
                code = -1;
                return;
        }
        if (c == 0) {
                (void) printf("?Invalid command\n");
                (void) fflush(stdout);
                code = -1;
                return;
        }
        if (!c->c_proxy) {
                (void) printf("?Invalid proxy command\n");
                (void) fflush(stdout);
                code = -1;
                return;
        }
        if (setjmp(abortprox)) {
                code = -1;
                return;
        }
        oldintr = signal(SIGINT, (void (*)())proxabort);
        pswitch(1);
        if (c->c_conn && !connected) {
                (void) printf("Not connected\n");
                (void) fflush(stdout);
                pswitch(0);
                (void) signal(SIGINT, oldintr);
                code = -1;
                return;
        }
        (*c->c_handler)(argc-1, argv+1);
        if (connected) {
                proxflag = 1;
        } else {
                proxflag = 0;
        }
        pswitch(0);
        (void) signal(SIGINT, oldintr);
}

/*ARGSUSED*/
void
setcase(int argc, char *argv[])
{
        mcase = !mcase;
        (void) printf("Case mapping %s.\n", onoff(mcase));
        code = mcase;
}

/*ARGSUSED*/
void
setcr(int argc, char *argv[])
{
        crflag = !crflag;
        (void) printf("Carriage Return stripping %s.\n", onoff(crflag));
        code = crflag;
}

void
setntrans(int argc, char *argv[])
{
        if (argc == 1) {
                ntflag = 0;
                (void) printf("Ntrans off.\n");
                code = ntflag;
                return;
        }
        ntflag++;
        code = ntflag;
        (void) strncpy(ntin, argv[1], 16);
        ntin[16] = '\0';
        if (argc == 2) {
                ntout[0] = '\0';
                return;
        }
        (void) strncpy(ntout, argv[2], 16);
        ntout[16] = '\0';
}

static char *
dotrans(char *name)
{
        static char new[MAXPATHLEN];
        char *cp1, *cp2 = new;
        int i, ostop, found;

        for (ostop = 0; *(ntout + ostop) && ostop < 16; ostop++)
                ;
        for (cp1 = name; *cp1; cp1++) {
                found = 0;
                for (i = 0; *(ntin + i) && i < 16; i++) {
                        if (*cp1 == *(ntin + i)) {
                                found++;
                                if (i < ostop) {
                                        *cp2++ = *(ntout + i);
                                }
                                break;
                        }
                }
                if (!found) {
                        *cp2++ = *cp1;
                }
        }
        *cp2 = '\0';
        return (new);
}

void
setnmap(int argc, char *argv[])
{
        char *cp;

        if (argc == 1) {
                mapflag = 0;
                (void) printf("Nmap off.\n");
                code = mapflag;
                return;
        }
        if (argc < 3) {
                if (prompt_for_arg(line, sizeof (line), "mapout") == -1) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc < 3) {
                (void) printf("Usage: %s [mapin mapout]\n", argv[0]);
                code = -1;
                return;
        }
        mapflag = 1;
        code = 1;
        cp = index(altarg, ' ');
        if (proxy) {
                while (*++cp == ' ')
                        /* NULL */;
                altarg = cp;
                cp = index(altarg, ' ');
        }
        *cp = '\0';
        (void) strncpy(mapin, altarg, MAXPATHLEN - 1);
        while (*++cp == ' ')
                /* NULL */;
        (void) strncpy(mapout, cp, MAXPATHLEN - 1);
}

static char *
domap(char *name)
{
        static char new[MAXPATHLEN];
        char *cp1 = name, *cp2 = mapin;
        char *tp[9], *te[9];
        int i, toks[9], toknum, match = 1;
        wchar_t wc1, wc2;
        int     len1, len2;

        for (i = 0; i < 9; ++i) {
                toks[i] = 0;
        }
        while (match && *cp1 && *cp2) {
                if ((len1 = mbtowc(&wc1, cp1, MB_CUR_MAX)) <= 0) {
                        wc1 = (unsigned char)*cp1;
                        len1 = 1;
                }
                cp1 += len1;
                if ((len2 = mbtowc(&wc2, cp2, MB_CUR_MAX)) <= 0) {
                        wc2 = (unsigned char)*cp2;
                        len2 = 1;
                }
                cp2 += len2;

                switch (wc2) {
                case '\\':
                        if ((len2 = mbtowc(&wc2, cp2, MB_CUR_MAX)) <= 0) {
                                wc2 = (unsigned char)*cp2;
                                len2 = 1;
                        }
                        cp2 += len2;
                        if (wc2 != wc1)
                                match = 0;
                        break;

                case '$':
                        if (*cp2 >= '1' && *cp2 <= '9') {
                                if ((len2 =
                                    mbtowc(&wc2, cp2 + 1, MB_CUR_MAX)) <= 0) {
                                        wc2 = (unsigned char)*(cp2 + 1);
                                        len2 = 1;
                                }
                                if (wc1 != wc2) {
                                        toks[toknum = *cp2 - '1']++;
                                        tp[toknum] = cp1 - len1;
                                        while (*cp1) {
                                                if ((len1 = mbtowc(&wc1,
                                                    cp1, MB_CUR_MAX)) <= 0) {
                                                        wc1 =
                                                            (unsigned char)*cp1;
                                                        len1 = 1;
                                                }
                                                cp1 += len1;
                                                if (wc2 == wc1)
                                                        break;
                                        }
                                        if (*cp1 == 0 && wc2 != wc1)
                                                te[toknum] = cp1;
                                        else
                                                te[toknum] = cp1 - len1;
                                }
                                cp2++;                  /* Consume the digit */
                                if (wc2)
                                        cp2 += len2;    /* Consume wide char */
                                break;
                        }
                        /* FALLTHROUGH */
                default:
                        if (wc2 != wc1)
                                match = 0;
                        break;
                }
        }

        cp1 = new;
        *cp1 = '\0';
        cp2 = mapout;
        while (*cp2) {
                match = 0;
                switch (*cp2) {
                case '\\':
                        cp2++;
                        if (*cp2) {
                                if ((len2 = mblen(cp2, MB_CUR_MAX)) <= 0)
                                        len2 = 1;
                                memcpy(cp1, cp2, len2);
                                cp1 += len2;
                                cp2 += len2;
                        }
                        break;

                case '[':
LOOP:
                        cp2++;
                        if (*cp2 == '$' && isdigit(*(cp2+1))) {
                                if (*++cp2 == '0') {
                                        char *cp3 = name;

                                        while (*cp3) {
                                                *cp1++ = *cp3++;
                                        }
                                        match = 1;
                                } else if (toks[toknum = *cp2 - '1']) {
                                        char *cp3 = tp[toknum];

                                        while (cp3 != te[toknum]) {
                                                *cp1++ = *cp3++;
                                        }
                                        match = 1;
                                }
                        } else {
                                while (*cp2 && *cp2 != ',' && *cp2 != ']') {
                                        if (*cp2 == '\\') {
                                                cp2++;
                                                continue;
                                        }

                                        if (*cp2 == '$' && isdigit(*(cp2+1))) {
                                                if (*++cp2 == '0') {
                                                        char *cp3 = name;

                                                        while (*cp3)
                                                                *cp1++ = *cp3++;
                                                        continue;
                                                }
                                                if (toks[toknum = *cp2 - '1']) {
                                                        char *cp3 = tp[toknum];

                                                        while (cp3 !=
                                                            te[toknum])
                                                                *cp1++ = *cp3++;
                                                }
                                                continue;
                                        }
                                        if (*cp2) {
                                                if ((len2 =
                                                    mblen(cp2, MB_CUR_MAX)) <=
                                                    0) {
                                                        len2 = 1;
                                                }
                                                memcpy(cp1, cp2, len2);
                                                cp1 += len2;
                                                cp2 += len2;
                                        }
                                }
                                if (!*cp2) {
                                        (void) printf(
                                                "nmap: unbalanced brackets\n");
                                        return (name);
                                }
                                match = 1;
                        }
                        if (match) {
                                while (*cp2 && *cp2 != ']') {
                                        if (*cp2 == '\\' && *(cp2 + 1)) {
                                                cp2++;
                                        }
                                        if ((len2 = mblen(cp2, MB_CUR_MAX)) <=
                                            0)
                                                len2 = 1;
                                        cp2 += len2;
                                }
                                if (!*cp2) {
                                        (void) printf(
                                                "nmap: unbalanced brackets\n");
                                        return (name);
                                }
                                cp2++;
                                break;
                        }
                        switch (*++cp2) {
                                case ',':
                                        goto LOOP;
                                case ']':
                                        break;
                                default:
                                        cp2--;
                                        goto LOOP;
                        }
                        cp2++;
                        break;
                case '$':
                        if (isdigit(*(cp2 + 1))) {
                                if (*++cp2 == '0') {
                                        char *cp3 = name;

                                        while (*cp3) {
                                                *cp1++ = *cp3++;
                                        }
                                } else if (toks[toknum = *cp2 - '1']) {
                                        char *cp3 = tp[toknum];

                                        while (cp3 != te[toknum]) {
                                                *cp1++ = *cp3++;
                                        }
                                }
                                cp2++;
                                break;
                        }
                        /* FALLTHROUGH */
                default:
                        if ((len2 = mblen(cp2, MB_CUR_MAX)) <= 0)
                                len2 = 1;
                        memcpy(cp1, cp2, len2);
                        cp1 += len2;
                        cp2 += len2;
                        break;
                }
        }
        *cp1 = '\0';
        if (!*new) {
                return (name);
        }
        return (new);
}

/*ARGSUSED*/
void
setsunique(int argc, char *argv[])
{
        sunique = !sunique;
        (void) printf("Store unique %s.\n", onoff(sunique));
        code = sunique;
}

/*ARGSUSED*/
void
setrunique(int argc, char *argv[])
{
        runique = !runique;
        (void) printf("Receive unique %s.\n", onoff(runique));
        code = runique;
}

/*ARGSUSED*/
void
setpassive(int argc, char *argv[])
{
        passivemode = !passivemode;
        (void) printf("Passive mode %s.\n", onoff(passivemode));
        code = passivemode;
}

void
settcpwindow(int argc, char *argv[])
{
        int owindowsize = tcpwindowsize;

        if (argc > 2) {
                (void) printf("usage: %s [size]\n", argv[0]);
                code = -1;
                return;
        }
        if (argc == 2) {
                int window;
                char *endp;

                errno = 0;
                window = (int)strtol(argv[1], &endp, 10);
                if (errno || window < 0 || *endp != '\0')
                        (void) printf("%s: Invalid size `%s'\n",
                                argv[0], argv[1]);
                else
                        tcpwindowsize = window;
        }
        if (tcpwindowsize == 0) {
                if (owindowsize == 0)
                        (void) printf("No TCP window size defined\n");
                else
                        (void) printf("TCP window size cleared\n");
        } else
                (void) printf("TCP window size is set to %d\n", tcpwindowsize);
}

/* change directory to parent directory */
/*ARGSUSED*/
void
cdup(int argc, char *argv[])
{
        (void) command("CDUP");
}

void
macdef(int argc, char *argv[])
{
        char *tmp;
        int c;

        if (macnum == 16) {
                (void) printf("Limit of 16 macros have already been defined\n");
                code = -1;
                return;
        }
        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "macro name") == -1) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }
        if (argc != 2) {
                (void) printf("Usage: %s macro_name\n", argv[0]);
                code = -1;
                return;
        }
        if (interactive) {
                (void) printf("Enter macro line by line, terminating "
                    "it with a null line\n");
        }
        (void) strncpy(macros[macnum].mac_name, argv[1], 8);
        if (macnum == 0) {
                macros[macnum].mac_start = macbuf;
        } else {
                macros[macnum].mac_start = macros[macnum - 1].mac_end + 1;
        }
        tmp = macros[macnum].mac_start;
        while (tmp != macbuf+4096) {
                if ((c = getchar()) == EOF) {
                        (void) printf("macdef:end of file encountered\n");
                        code = -1;
                        return;
                }
                if ((*tmp = c) == '\n') {
                        if (tmp == macros[macnum].mac_start) {
                                macros[macnum++].mac_end = tmp;
                                code = 0;
                                return;
                        }
                        if (*(tmp-1) == '\0') {
                                macros[macnum++].mac_end = tmp - 1;
                                code = 0;
                                return;
                        }
                        *tmp = '\0';
                }
                tmp++;
        }
        for (;;) {
                while ((c = getchar()) != '\n' && c != EOF)
                        /* NULL */;
                if (c == EOF || getchar() == '\n') {
                        (void) printf(
                                "Macro not defined - 4k buffer exceeded\n");
                        code = -1;
                        return;
                }
        }
}

/*
 * The p_name strings are for the getlevel and setlevel commands.
 * The name strings for printing are in the arpa/ftp.h file in the
 * protnames[] array of strings.
 */
static  struct  levels {
        char    *p_name;
        char    *p_mode;
        int     p_level;
} levels[] = {
        { "clear",      "C",    PROT_C },
        { "safe",       "S",    PROT_S },
        { "private",    "P",    PROT_P },
        NULL
};

/*
 * Return a pointer to a string which is the readable version of the
 * protection level, or NULL if the input level is not found.
 */
static char *
getlevel(int level)
{
        struct levels *p;

        for (p = levels; (p != NULL) && (p->p_level != level); p++)
                ;
        return (p ? p->p_name : NULL);
}

static char *plevel[] = {
        "protect",
        "",
        NULL
};

/*
 * Set control channel protection level.
 */
void
setclevel(int argc, char *argv[])
{
        struct levels *p;
        char *levelp;
        int comret;

        if (argc > 2) {
                char *sep;

                (void) printf("usage: %s [", argv[0]);
                sep = " ";
                for (p = levels; p->p_name; p++) {
                        (void) printf("%s%s", sep, p->p_name);
                        if (*sep == ' ')
                                sep = " | ";
                }
                (void) printf(" ]\n");
                code = -1;
                return;
        }
        if (argc < 2) {
                levelp = getlevel(clevel);
                (void) printf("Using %s protection level for commands.\n",
                        levelp ? levelp : "<unknown>");
                code = 0;
                return;
        }
        for (p = levels; (p != NULL) && (p->p_name); p++)
                if (strcmp(argv[1], p->p_name) == 0)
                        break;
        if (p->p_name == 0) {
                (void) printf("%s: unknown protection level\n", argv[1]);
                code = -1;
                return;
        }
        if (auth_type == AUTHTYPE_NONE) {
                if (strcmp(p->p_name, "clear"))
                        (void) printf("Cannot set protection level to %s\n",
                                argv[1]);
                return;
        }
        if (strcmp(p->p_name, "clear") == 0) {
                comret = command("CCC");
                if (comret == COMPLETE)
                        clevel = PROT_C;
                return;
        }
        clevel = p->p_level;
        (void) printf("Control channel protection level set to %s.\n",
                p->p_name);
}

/*
 * Set data channel protection level.
 */
void
setdlevel(int argc, char *argv[])
{
        struct levels *p;
        int comret;

        if (argc != 2) {
                char *sep;

                (void) printf("usage: %s [", argv[0]);
                sep = " ";
                for (p = levels; p->p_name; p++) {
                        (void) printf("%s%s", sep, p->p_name);
                        if (*sep == ' ')
                                sep = " | ";
                }
                (void) printf(" ]\n");
                code = -1;
                return;
        }
        for (p = levels; p->p_name; p++)
                if (strcmp(argv[1], p->p_name) == 0)
                        break;
        if (p->p_name == 0) {
                (void) printf("%s: unknown protection level\n", argv[1]);
                code = -1;
                return;
        }
        if (auth_type == AUTHTYPE_NONE) {
                if (strcmp(p->p_name, "clear"))
                        (void) printf("Cannot set protection level to %s\n",
                                argv[1]);
                return;
        }
        /* Start with a PBSZ of 1 meg */
        if (p->p_level != PROT_C)
                setpbsz(1<<20);
        comret = command("PROT %s", p->p_mode);
        if (comret == COMPLETE)
                dlevel = p->p_level;
}

/*
 * Set clear command protection level.
 */
/* VARARGS */
void
ccc(int argc, char *argv[])
{
        plevel[1] = "clear";
        setclevel(2, plevel);
}

/*
 * Set clear data protection level.
 */
/* VARARGS */
void
setclear(int argc, char *argv[])
{
        plevel[1] = "clear";
        setdlevel(2, plevel);
}

/*
 * Set safe data protection level.
 */
/* VARARGS */
void
setsafe(int argc, char *argv[])
{
        plevel[1] = "safe";
        setdlevel(2, plevel);
}

/*
 * Set private data protection level.
 */
/* VARARGS */
void
setprivate(int argc, char *argv[])
{
        plevel[1] = "private";
        setdlevel(2, plevel);
}

/*
 * Set mechanism type
 */
void
setmech(int  argc, char *argv[])
{
        char    tempmech[MECH_SZ];

        if (argc < 2) {
                if (prompt_for_arg(line, sizeof (line), "mech-type") == -1) {
                        code = -1;
                        return;
                }
                makeargv();
                argc = margc;
                argv = margv;
        }

        if (argc != 2) {
                (void) printf("usage: %s [ mechanism type ]\n", argv[0]);
                code = -1;
                return;
        }

        if ((strlcpy(tempmech, argv[1], MECH_SZ) >= MECH_SZ) ||
                __gss_mech_to_oid(tempmech, (gss_OID*)&mechoid) !=
                        GSS_S_COMPLETE) {
                (void) printf("%s: %s: not a valid security mechanism\n",
                        argv[0], tempmech);
                code = -1;
                return;
        } else {
                (void) strlcpy(mechstr, tempmech, MECH_SZ);
                (void) printf("Using %s mechanism type\n", mechstr);
                code = 0;
                return;
        }
}