/* 
 * Copyright (c) 1983, 1990, 1992, 1993 The Regents of the University of 
 * California.  All rights reserved. Redistribution and use in source and 
 * binary forms, with or without modification, are permitted provided that
 * the following conditions are met: 1. Redistributions of source code
 * must retain the above copyright notice, this list of conditions and
 * the following disclaimer. 2. Redistributions in binary form must
 * reproduce the above copyright notice, this list of conditions and the 
 * following disclaimer in the documentation and/or other materials
 * provided with the distribution. 3. All advertising materials mentioning
 * features or use of this software must display the following
 * acknowledgement: This product includes software developed by the
 * University of California, Berkeley and its contributors. 4. Neither
 * the name of the University nor the names of its contributors may be
 * used to endorse or promote products derived from this software 
 * without specific prior written permission. THIS SOFTWARE IS PROVIDED
 * BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN 
 * NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE. 
 *
 * Ported to the Amiga by Michael Heinz. 
 */

#include <sys/param.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>

#include <ctype.h>
#include <dirent.h>
#include "err.h"
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string.h>
#include <unistd.h>
#include <dos.h>

#include "pathnames.h"
#include "extern.h"

/* MHEINZ */
#define MAXPATHLEN 256
/* #define BUFSIZ 2048 */

#define	OPTIONS "dfprt"

struct passwd *pwd;
u_short port;
uid_t userid;
int errs, rem;
int pflag, iamremote, iamrecursive, targetshouldbedirectory;

/* 
 * must hold "rcp -r -p -d\0" 
 */
#define	CMDNEEDS	64
char cmd[CMDNEEDS];				 

int response(void);
void rsource(char *, struct stat *);
void sink(int, char *[]);
void source(int, char *[]);
void tolocal(int, char *[]);
void toremote(char *, int, char *[]);
void usage(void);

/* 
 * * MHEINZ - emulate UNIX ftruncate function. */
int
ftruncate(int fd, long len)
{
    long i, olen;
    char buf = '\0';

    olen = lseek(fd, 0L, 2);

    if (olen == len)
	return 0;

    for (i = olen; i < len; i++) {
	write(fd, &buf, 1);
    }

    return 0;
}

int
main(int argc, char *argv[])
{
    struct servent *sp;
    int ch, fflag, tflag;
    char *targ, *shell;

    fflag = tflag = 0;
    while ((ch = getopt(argc, argv, OPTIONS)) != EOF)
	switch (ch) {				 /* User-visible flags. */
	    case 'p':
		pflag = 1;
		break;
	    case 'r':
		iamrecursive = 1;
		break;
		/* Server options. */
	    case 'd':
		targetshouldbedirectory = 1;
		break;
	    case 'f':				 /* "from" */
		iamremote = 1;
		fflag = 1;
		break;
	    case 't':				 /* "to" */
		iamremote = 1;
		tflag = 1;
		break;
	    case '?':
	    default:
		usage();
	}
    argc -= optind;
    argv += optind;

    sp = getservbyname(shell = "shell", "tcp");
    if (sp == NULL)
	errx(stderr, "%s/tcp: unknown service", shell);
    port = sp->s_port;

    if ((pwd = getpwuid(userid = getuid())) == NULL)
	errx(stderr, "unknown user %d", (int)userid);

    rem = 0;					 /* stdin - mheinz */

    if (fflag) {
	/* Follow "protocol", send data. */
	(void)response();
	(void)setuid(userid);
	source(argc, argv);
	exit(errs);
    }
    if (tflag) {				 /* Receive data. */
	(void)setuid(userid);
	sink(argc, argv);
	exit(errs);
    }
    if (argc < 2)
	usage();
    if (argc > 2)
	targetshouldbedirectory = 1;

    rem = -1;
    /* Command to be executed on remote system using "rsh". */
    (void)sprintf(cmd, "rcp%s%s%s",
		  iamrecursive ? " -r" : "", 
		  pflag ? " -p" : "",
		  targetshouldbedirectory ? " -d" : "");
    if (targ = colon(argv[argc - 1]))		 /* Dest is remote host. */
	toremote(targ, argc, argv);
    else {
	if (targetshouldbedirectory)
	    verifydir(argv[argc - 1]);
	tolocal(argc, argv);			 /* Dest is local host. */
    }
    exit(errs);
}

void
toremote(char *targ, int argc, char *argv[])
{
    int i, len, tos;
    char *bp, *host, *src, *suser, *thost, *tuser;

    *targ++ = 0;
    if (*targ == 0)
	targ = ".";

    if (thost = strchr(argv[argc - 1], '@')) {
   	/* user@host */
	*thost++ = 0;
	tuser = argv[argc - 1];
	if (*tuser == '\0')
	    tuser = NULL;
	else if (!okname(tuser))
	    exit(1);
    } else {
	thost = argv[argc - 1];
	tuser = NULL;
    }

    for (i = 0; i < argc - 1; i++) {
	src = colon(argv[i]);
	if (src) {				 /* remote to remote */
	    *src++ = 0;
	    if (*src == 0)
		src = ".";
	    host = strchr(argv[i], '@');
	    len = strlen(_PATH_RSH) + strlen(argv[i]) +
		strlen(src) + (tuser ? strlen(tuser) : 0) +
		strlen(thost) + strlen(targ) + CMDNEEDS + 20;
	    if (!(bp = malloc(len)))
		err(stderr, "Failed to allocate a buffer.");
	    if (host) {
		*host++ = 0;
		suser = argv[i];
		if (*suser == '\0')
		    suser = pwd->pw_name;
		else if (!okname(suser))
		    continue;
		(void)sprintf(bp, "%s %s -l %s -n %s %s '%s%s%s:%s'",
			      _PATH_RSH, host, suser, cmd, src,
			      tuser ? tuser : "", tuser ? "@" : "",
			      thost, targ);
	    } else
		(void)sprintf(bp, "exec %s %s -n %s %s '%s%s%s:%s'",
			      _PATH_RSH, argv[i], cmd, src,
			      tuser ? tuser : "", tuser ? "@" : "",
			      thost, targ);
	    (void)susystem(bp, userid);
	    (void)free(bp);
	} else {				 /* local to remote */
	    if (rem == -1) {
		len = strlen(targ) + CMDNEEDS + 20;
		if (!(bp = malloc(len)))
		    err(stderr, "Failed to allocate a buffer.");
		(void)sprintf(bp, "%s -t %s", cmd, targ);
		host = thost;
		rem = rcmd(&host, port, pwd->pw_name,
			   tuser ? tuser : pwd->pw_name,
			   bp, 0);
		if (rem < 0)
		    errx(stderr, "rcmd failed.");

		tos = IPTOS_THROUGHPUT; 
		/* tos = IPTOS_RELIABILITY;*/

		if (setsockopt(rem, IPPROTO_IP, IP_TOS,
			       &tos, sizeof(int)) < 0)
		     warn("TOS (ignored)");

		if (response() < 0)
		    exit(1);
		(void)free(bp);
		(void)setuid(userid);
	    }
	    source(1, argv + i);
	}
    }
}

void
tolocal(int argc, char *argv[])
{
    int i, len, tos;
    char *bp, *host, *src, *suser;

    for (i = 0; i < argc - 1; i++) {
	if (!(src = colon(argv[i]))) {		 /* Local to local. */
	    len = strlen(_PATH_CP) + strlen(argv[i]) +
		strlen(argv[argc - 1]) + 20;
	    if (!(bp = malloc(len)))
		err(stderr, "Failed to allocate a buffer.");
	    (void)sprintf(bp, "%s %s %s %s %s", _PATH_CP,
			  argv[i], argv[argc - 1],
			  iamrecursive ? "all" : "", pflag ? "clone" : "");
	    if (susystem(bp, userid))
		++errs;
	    (void)free(bp);
	    continue;
	}
	*src++ = 0;
	if (*src == 0)
	    src = ".";
	if ((host = strchr(argv[i], '@')) == NULL) {
	    host = argv[i];
	    suser = pwd->pw_name;
	} else {
	    *host++ = 0;
	    suser = argv[i];
	    if (*suser == '\0')
		suser = pwd->pw_name;
	    else if (!okname(suser))
		continue;
	}
	len = strlen(src) + CMDNEEDS + 20;
	if ((bp = malloc(len)) == NULL)
	    err(stderr, "Failed to allocate a buffer.");
	(void)sprintf(bp, "%s -f %s", cmd, src);
	rem = rcmd(&host, port, pwd->pw_name, suser, bp, 0);
	(void)free(bp);
	if (rem < 0) {
	    ++errs;
	    continue;
	}
	(void)seteuid(userid);
	/* tos = IPTOS_THROUGHPUT; */
	tos = IPTOS_RELIABILITY;
	if (setsockopt(rem, IPPROTO_IP, IP_TOS, &tos, sizeof(int)) < 0)
	     warn("TOS (ignored)");

	sink(1, argv + argc - 1);
	(void)seteuid(0);
	(void)close(rem);
	rem = -1;
    }
}

void
source(int argc, char *argv[])
{
    struct stat stb;
    static BUF buffer;
    BUF *bp;
    off_t i;
    int amt, fd, haderr, indx, result;
    char *last, *name, buf[BUFSIZ];

    for (indx = 0; indx < argc; ++indx) {
	name = argv[indx];
	if ((fd = open(name, O_RDONLY, 0)) < 0)
	    goto syserr;
	if (fstat(fd, &stb)) {
	  syserr:run_err("%s: %s", name, strerror(errno));
	    goto next;
	}
	switch (stb.st_mode & S_IFMT) {
	    case S_IFREG:
		break;
	    case S_IFDIR:
		if (iamrecursive) {
		    rsource(name, &stb);
		    goto next;
		}
		/* FALLTHROUGH */
	    default:
		run_err("%s: not a regular file", name);
		goto next;
	}
	if ((last = strrchr(name, '/')) == NULL)
	    last = name;
	else
	    ++last;
	if (pflag) {
	    /* 
	     * Make it compatible with possible future
	     * versions expecting microseconds.
	     */
	    (void)sprintf(buf, "T%ld 0 %ld 0\n",
			  stb.st_mtime, stb.st_atime);
	    (void)write(rem, buf, strlen(buf));
	    if (response() < 0)
		goto next;
	}
	(void)sprintf(buf, "C%04o %ld %s\n",
		      stb.st_mode & 0755, stb.st_size, last);
	(void)write(rem, buf, strlen(buf));
	if (response() < 0)
	    goto next;
	if ((bp = allocbuf(&buffer, fd, BUFSIZ)) == NULL) {
	  next:(void)close(fd);
	    continue;
	}
	/* Keep writing after an error so that we stay sync'd up. */
	for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
	    amt = bp->cnt;
	    if (i + amt > stb.st_size)
		amt = stb.st_size - i;
	    if (!haderr) {
		result = read(fd, bp->buf, amt);
		if (result != amt)
		    haderr = result >= 0 ? EIO : errno;
	    }
	    if (haderr)
		(void)write(rem, bp->buf, amt);
	    else {
		result = write(rem, bp->buf, amt);
		if (result != amt)
		    haderr = result >= 0 ? EIO : errno;
	    }
	}
	if (close(fd) && !haderr)
	    haderr = errno;
	if (!haderr)
	    (void)write(rem, "", 1);
	else
	    run_err("%s: %s", name, strerror(haderr));
	(void)response();
    }
}

void
rsource(char *name, struct stat *statp)
{
    DIR *dirp;
    struct dirent *dp;
    char *last, *vect[1], path[MAXPATHLEN];

    if (!(dirp = opendir(name))) {
	run_err("%s: %s", name, strerror(errno));
	return;
    }
    last = strrchr(name, '/');
    if (last == 0)
	last = name;
    else
	last++;
    if (pflag) {
	(void)sprintf(path, "T%ld 0 %ld 0\n",
		      statp->st_mtime, statp->st_atime);
	(void)write(rem, path, strlen(path));
	if (response() < 0) {
	    closedir(dirp);
	    return;
	}
    }
    (void)sprintf(path, "D%04o %d %s\n", statp->st_mode & 0755, 0, last);
    (void)write(rem, path, strlen(path));
    if (response() < 0) {
	closedir(dirp);
	return;
    }
    while (dp = readdir(dirp)) {
	if (dp->d_ino == 0)
	    continue;
	if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
	    continue;
	if (strlen(name) + 1 + strlen(dp->d_name) >= MAXPATHLEN - 1) {
	    run_err("%s/%s: name too long", name, dp->d_name);
	    continue;
	}
	(void)sprintf(path, "%s/%s", name, dp->d_name);
	vect[0] = path;
	source(1, vect);
    }
    (void)closedir(dirp);
    (void)write(rem, "E\n", 2);
    (void)response();
}

void
sink(int argc, char *argv[])
{
    static BUF buffer;
    struct stat stb;
    struct timeval tv[2];
    enum {
	YES, NO, DISPLAYED
    } wrerr;
    BUF *bp;
    off_t i, j;
    int amt, count, exists, first, mask, mode, ofd, omode;
    int setimes, size, targisdir, wrerrno;
    char ch, *cp, *np, *targ, *why, *vect[1], buf[BUFSIZ];

#define	atime	tv[0]
#define	mtime	tv[1]
#define	SCREWUP(str)	{ why = str; goto screwup; }

    setimes = targisdir = 0;
    mask = umask(0);
    if (!pflag)
	(void)umask(mask);
    if (argc != 1) {
	run_err("ambiguous target");
	exit(1);
    }
    targ = *argv;
    if (targetshouldbedirectory)
	verifydir(targ);
    (void)write(rem, "", 1);
    if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
	targisdir = 1;
    for (first = 1;; first = 0) {
	cp = buf;
	if (read(rem, cp, 1) <= 0)
	    return;
	if (*cp++ == '\n')
	    SCREWUP("unexpected <newline>");
	do {
	    if (read(rem, &ch, sizeof(ch)) != sizeof(ch))
		SCREWUP("lost connection");
	    *cp++ = ch;
	} while (cp < &buf[BUFSIZ - 1] && ch != '\n');
	*cp = 0;

	if (buf[0] == '\01' || buf[0] == '\02') {
	    if (iamremote == 0)
		(void)write(2,
			    buf + 1, strlen(buf + 1));
	    if (buf[0] == '\02')
		exit(1);
	    ++errs;
	    continue;
	}
	if (buf[0] == 'E') {
	    (void)write(rem, "", 1);
	    return;
	}
	if (ch == '\n')
	    *--cp = 0;

#define getnum(t) (t) = 0; while (isdigit(*cp)) (t) = (t) * 10 + (*cp++ - '0');
	cp = buf;
	if (*cp == 'T') {
	    setimes++;
	    cp++;
	    getnum(mtime.tv_sec);
	    if (*cp++ != ' ')
		SCREWUP("mtime.sec not delimited");
	    getnum(mtime.tv_usec);
	    if (*cp++ != ' ')
		SCREWUP("mtime.usec not delimited");
	    getnum(atime.tv_sec);
	    if (*cp++ != ' ')
		SCREWUP("atime.sec not delimited");
	    getnum(atime.tv_usec);
	    if (*cp++ != '\0')
		SCREWUP("atime.usec not delimited");
	    (void)write(rem, "", 1);
	    continue;
	}
	if (*cp != 'C' && *cp != 'D') {
	    /* 
	     * Check for the case "rcp remote:foo\* local:bar".
	     * In this case, the line "No match." can be returned
	     * by the shell before the rcp command on the remote is
	     * executed so the ^Aerror_message convention isn't
	     * followed.
	     */
	    if (first) {
		run_err("%s", cp);
		exit(1);
	    }
	    SCREWUP("expected control record");
	}
	mode = 0;
	for (++cp; cp < buf + 5; cp++) {
	    if (*cp < '0' || *cp > '7')
		SCREWUP("bad mode");
	    mode = (mode << 3) | (*cp - '0');
	}
	if (*cp++ != ' ')
	    SCREWUP("mode not delimited");

	for (size = 0; isdigit(*cp);)
	    size = size * 10 + (*cp++ - '0');
	if (*cp++ != ' ')
	    SCREWUP("size not delimited");
	if (targisdir) {
	    static char *namebuf;
	    static int cursize;
	    size_t need;

	    need = strlen(targ) + strlen(cp) + 250;
	    if (need > cursize) {
		if (!(namebuf = malloc(need)))
		    run_err("%s", strerror(errno));
	    }
	    (void)sprintf(namebuf, "%s%s%s", targ,
			  *targ ? "/" : "", cp);
	    np = namebuf;
	} else
	    np = targ;
	exists = stat(np, &stb) == 0;
	if (buf[0] == 'D') {
	    int mod_flag = pflag;

	    if (exists) {
		if (!S_ISDIR(stb.st_mode)) {
		    errno = ENOTDIR;
		    goto bad;
		}
		if (pflag)
		    (void)chmod(np, mode);
	    } else {
		/* Handle copying from a read-only directory */
		mod_flag = 1;
		if (mkdir(np) < 0)
		    goto bad;
	    }
	    vect[0] = np;
	    sink(1, vect);
	    if (setimes) {
		setimes = 0;
		/* if (utimes(np, tv) < 0) run_err("%s: set times: %s", np, * 
		 * 
		 * *  * * strerror(errno)); MHEINZ */
	    }
	    if (mod_flag)
		(void)chmod(np, mode);
	    continue;
	}
	omode = mode;
	mode |= S_IWRITE;
	if ((ofd = open(np, O_WRONLY | O_CREAT, mode)) < 0) {
	  bad:run_err("%s: %s", np, strerror(errno));
	    continue;
	}
	(void)write(rem, "", 1);
	if ((bp = allocbuf(&buffer, ofd, BUFSIZ)) == NULL) {
	    (void)close(ofd);
	    continue;
	}
	cp = bp->buf;
	wrerr = NO;
	for (count = i = 0; i < size; i += BUFSIZ) {
	    amt = BUFSIZ;
	    if (i + amt > size)
		amt = size - i;
	    count += amt;
	    do {
		j = read(rem, cp, amt);
		if (j <= 0) {
		    run_err("%s", j ? strerror(errno) :
			    "dropped connection");
		    exit(1);
		}
		amt -= j;
		cp += j;
	    } while (amt > 0);
	    if (count == bp->cnt) {
		/* Keep reading so we stay sync'd up. */
		if (wrerr == NO) {
		    j = write(ofd, bp->buf, count);
		    if (j != count) {
			wrerr = YES;
			wrerrno = j >= 0 ? EIO : errno;
		    }
		}
		count = 0;
		cp = bp->buf;
	    }
	}
	if (count != 0 && wrerr == NO &&
	    (j = write(ofd, bp->buf, count)) != count) {
	    wrerr = YES;
	    wrerrno = j >= 0 ? EIO : errno;
	}
	if (ftruncate(ofd, size)) {
	    run_err("%s: truncate: %s", np, strerror(errno));
	    wrerr = DISPLAYED;
	}
	if (pflag) {
	    if (exists || omode != mode)
		if (chmod(np, omode))
		    run_err("%s: set mode: %s",
			    np, strerror(errno));
	} else {
	    if (!exists && omode != mode)
		if (chmod(np, omode & ~mask))
		    run_err("%s: set mode: %s",
			    np, strerror(errno));
	}
	(void)close(ofd);
	(void)response();
	if (setimes && wrerr == NO) {
	    setimes = 0;
	}
	switch (wrerr) {
	    case YES:
		run_err("%s: %s", np, strerror(wrerrno));
		break;
	    case NO:
		(void)write(rem, "", 1);
		break;
	    case DISPLAYED:
		break;
	}
    }
  screwup:
    run_err("protocol error: %s", why);
    exit(1);
}

int
response()
{
    char ch, *cp, resp, rbuf[BUFSIZ];

    if (read(rem, &resp, sizeof(resp)) != sizeof(resp))
	lostconn(0);

    cp = rbuf;
    switch (resp) {
	case 0:				 /* ok */
	    return (0);
	default:
	    *cp++ = resp;
	    /* FALLTHROUGH */
	case 1:				 
	    /* error, followed by error msg */
	case 2:				 
	    /* fatal error */
	    do {
		if (read(rem, &ch, sizeof(ch)) != sizeof(ch))
		    lostconn(0);
		*cp++ = ch;
	    } while (cp < &rbuf[BUFSIZ] && ch != '\n');
	    *cp = '\0';
	    if (!iamremote)
		err(stderr, rbuf);
	    ++errs;
	    if (resp == 1)
		return (-1);
	    exit(1);
    }
    /* NOTREACHED */
}

void
usage()
{
    (void)fprintf(stderr,
		  "rcp - ported to the Amiga and AmiTCP by Michael Heinz.\nusage: rcp [-p] f1 f2; or: rcp [-pr] f1 ... fn directory\n");
    exit(1);
}

#include <stdarg.h>

void
run_err(const char *fmt,...)
{
    static FILE *fp;
    va_list ap;

    va_start(ap, fmt);

    ++errs;
    if (fp == NULL && !(fp = fdopen(rem, "w")))
	return;
    (void)fprintf(fp, "%c", 0x01);
    (void)fprintf(fp, "rcp: ");
    (void)vfprintf(fp, fmt, ap);
    (void)fprintf(fp, "\n");
    (void)fflush(fp);

    if (!iamremote) {
	char buf[256];

	vsprintf(buf, fmt, ap);
	warn(buf);
    }
    va_end(ap);
}