Initial revision

1 files changed, 1220 insertions, 0 deletions

diff --git a/scp.c b/scp.c
new file mode 100644
index 00000000..6145fdeb
--- /dev/null
+++ b/scp.c
@@ -0,0 +1,1220 @@
+/*
+
+scp - secure remote copy.  This is basically patched BSD rcp which uses ssh
+to do the data transfer (instead of using rcmd).
+
+NOTE: This version should NOT be suid root.  (This uses ssh to do the transfer
+and ssh has the necessary privileges.)
+
+1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi>
+     
+*/
+
+/*
+ * Copyright (c) 1983, 1990, 1992, 1993, 1995
+ *	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.
+ *
+ *	$Id: scp.c,v 1.1 1999/10/27 03:42:45 damien Exp $
+ */
+
+#include "includes.h"
+RCSID("$Id: scp.c,v 1.1 1999/10/27 03:42:45 damien Exp $");
+
+#include "ssh.h"
+#include "xmalloc.h"
+#include <utime.h>
+
+#define _PATH_CP "cp"
+
+/* For progressmeter() -- number of seconds before xfer considered "stalled" */
+#define STALLTIME	5
+
+/* Visual statistics about files as they are transferred. */
+void progressmeter(int);
+
+/* Returns width of the terminal (for progress meter calculations). */
+int getttywidth(void);
+
+/* Time a transfer started. */
+static struct timeval start;
+
+/* Number of bytes of current file transferred so far. */
+volatile unsigned long statbytes;
+
+/* Total size of current file. */
+unsigned long totalbytes = 0;
+
+/* Name of current file being transferred. */
+char *curfile;
+
+/* This is set to non-zero to enable verbose mode. */
+int verbose = 0;
+
+/* This is set to non-zero if compression is desired. */
+int compress = 0;
+
+/* This is set to zero if the progressmeter is not desired. */
+int showprogress = 1;
+
+/* This is set to non-zero if running in batch mode (that is, password
+   and passphrase queries are not allowed). */
+int batchmode = 0;
+
+/* This is set to the cipher type string if given on the command line. */
+char *cipher = NULL;
+
+/* This is set to the RSA authentication identity file name if given on 
+   the command line. */
+char *identity = NULL;
+
+/* This is the port to use in contacting the remote site (is non-NULL). */
+char *port = NULL;
+
+/* This function executes the given command as the specified user on the given
+   host.  This returns < 0 if execution fails, and >= 0 otherwise.
+   This assigns the input and output file descriptors on success. */
+
+int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
+{
+  int pin[2], pout[2], reserved[2];
+
+  if (verbose)
+    fprintf(stderr, "Executing: host %s, user %s, command %s\n",
+	    host, remuser ? remuser : "(unspecified)", cmd);
+
+  /* Reserve two descriptors so that the real pipes won't get descriptors
+     0 and 1 because that will screw up dup2 below. */
+  pipe(reserved);
+
+  /* Create a socket pair for communicating with ssh. */
+  if (pipe(pin) < 0)
+    fatal("pipe: %s", strerror(errno));
+  if (pipe(pout) < 0)
+    fatal("pipe: %s", strerror(errno));
+
+  /* Free the reserved descriptors. */
+  close(reserved[0]);
+  close(reserved[1]);
+
+  /* For a child to execute the command on the remote host using ssh. */
+  if (fork() == 0) 
+    {
+      char *args[100];
+      unsigned int i;
+
+      /* Child. */
+      close(pin[1]);
+      close(pout[0]);
+      dup2(pin[0], 0);
+      dup2(pout[1], 1);
+      close(pin[0]);
+      close(pout[1]);
+
+      i = 0;
+      args[i++] = SSH_PROGRAM;
+      args[i++] = "-x";
+      args[i++] = "-oFallBackToRsh no";
+      if (verbose)
+	args[i++] = "-v";
+      if (compress)
+	args[i++] = "-C";
+      if (batchmode)
+	args[i++] = "-oBatchMode yes";
+      if (cipher != NULL)
+	{
+	  args[i++] = "-c";
+	  args[i++] = cipher;
+	}
+      if (identity != NULL)
+	{
+	  args[i++] = "-i";
+	  args[i++] = identity;
+	}
+      if (port != NULL)
+	{
+	  args[i++] = "-p";
+	  args[i++] = port;
+	}
+      if (remuser != NULL)
+	{
+	  args[i++] = "-l";
+	  args[i++] = remuser;
+	}
+      args[i++] = host;
+      args[i++] = cmd;
+      args[i++] = NULL;
+
+      execvp(SSH_PROGRAM, args);
+      perror(SSH_PROGRAM);
+      exit(1);
+    }
+  /* Parent.  Close the other side, and return the local side. */
+  close(pin[0]);
+  *fdout = pin[1];
+  close(pout[1]);
+  *fdin = pout[0];
+  return 0;
+}
+
+void fatal(const char *fmt, ...)
+{
+  va_list ap;
+  char buf[1024];
+
+  va_start(ap, fmt);
+  vsnprintf(buf, sizeof(buf), fmt, ap);
+  va_end(ap);
+  fprintf(stderr, "%s\n", buf);
+  exit(255);
+}
+
+/* This stuff used to be in BSD rcp extern.h. */
+
+typedef struct {
+	int cnt;
+	char *buf;
+} BUF;
+
+extern int iamremote;
+
+BUF	*allocbuf(BUF *, int, int);
+char	*colon(char *);
+void	 lostconn(int);
+void	 nospace(void);
+int	 okname(char *);
+void	 run_err(const char *, ...);
+void	 verifydir(char *);
+
+/* Stuff from BSD rcp.c continues. */
+
+struct passwd *pwd;
+uid_t	userid;
+int errs, remin, remout;
+int pflag, iamremote, iamrecursive, targetshouldbedirectory;
+
+#define	CMDNEEDS	64
+char cmd[CMDNEEDS];		/* must hold "rcp -r -p -d\0" */
+
+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);
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	int ch, fflag, tflag;
+	char *targ;
+	extern char *optarg;
+	extern int optind;
+
+	fflag = tflag = 0;
+	while ((ch = getopt(argc, argv,  "dfprtvBCc:i:P:q")) != EOF)
+		switch(ch) {			/* User-visible flags. */
+		case 'p':
+			pflag = 1;
+			break;
+		case 'P':
+		  	port = optarg;
+		  	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 'c':
+			cipher = optarg;
+		  	break;
+		case 'i':
+		  	identity = optarg;
+			break;
+		case 'v':
+			verbose = 1;
+		  	break;
+		case 'B':
+		  	batchmode = 1;
+		  	break;
+		case 'C':
+		  	compress = 1;
+		  	break;
+		case 'q':
+		  	showprogress = 0;
+		  	break;
+		case '?':
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	if ((pwd = getpwuid(userid = getuid())) == NULL)
+		fatal("unknown user %d", (int)userid);
+
+	if (! isatty(STDERR_FILENO))
+		showprogress = 0;
+
+	remin = STDIN_FILENO;
+	remout = STDOUT_FILENO;
+
+	if (fflag) {			/* Follow "protocol", send data. */
+		(void)response();
+		source(argc, argv);
+		exit(errs != 0);
+	}
+
+	if (tflag) {			/* Receive data. */
+		sink(argc, argv);
+		exit(errs != 0);
+	}
+
+	if (argc < 2)
+		usage();
+	if (argc > 2)
+		targetshouldbedirectory = 1;
+
+	remin = remout = -1;
+	/* Command to be executed on remote system using "ssh". */
+  	(void)sprintf(cmd, "scp%s%s%s%s", verbose ? " -v" : "",
+	    iamrecursive ? " -r" : "", pflag ? " -p" : "",
+	    targetshouldbedirectory ? " -d" : "");
+
+	(void)signal(SIGPIPE, lostconn);
+
+	if ((targ = colon(argv[argc - 1])))	/* Dest is remote host. */
+		toremote(targ, argc, argv);
+	else {
+		tolocal(argc, argv);		/* Dest is local host. */
+		if (targetshouldbedirectory)
+			verifydir(argv[argc - 1]);
+	}
+	exit(errs != 0);
+}
+
+void
+toremote(targ, argc, argv)
+	char *targ, *argv[];
+	int argc;
+{
+	int i, len;
+	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(SSH_PROGRAM) + strlen(argv[i]) +
+			    strlen(src) + (tuser ? strlen(tuser) : 0) +
+			    strlen(thost) + strlen(targ) + CMDNEEDS + 32;
+		        bp = xmalloc(len);
+			if (host) {
+				*host++ = 0;
+				suser = argv[i];
+				if (*suser == '\0')
+					suser = pwd->pw_name;
+				else if (!okname(suser))
+					continue;
+				(void)sprintf(bp, 
+				    "%s%s -x -o'FallBackToRsh no' -n -l %s %s %s %s '%s%s%s:%s'",
+				    SSH_PROGRAM, verbose ? " -v" : "",
+				    suser, host, cmd, src,
+				    tuser ? tuser : "", tuser ? "@" : "",
+				    thost, targ);
+			} else
+				(void)sprintf(bp,
+				    "exec %s%s -x -o'FallBackToRsh no' -n %s %s %s '%s%s%s:%s'",
+				    SSH_PROGRAM, verbose ? " -v" : "",
+				    argv[i], cmd, src,
+				    tuser ? tuser : "", tuser ? "@" : "",
+				    thost, targ);
+		        if (verbose)
+			  fprintf(stderr, "Executing: %s\n", bp);
+			(void)system(bp);
+			(void)xfree(bp);
+		} else {			/* local to remote */
+			if (remin == -1) {
+				len = strlen(targ) + CMDNEEDS + 20;
+			        bp = xmalloc(len);
+				(void)sprintf(bp, "%s -t %s", cmd, targ);
+				host = thost;
+				if (do_cmd(host,  tuser,
+					   bp, &remin, &remout) < 0)
+				  exit(1);
+				if (response() < 0)
+					exit(1);
+				(void)xfree(bp);
+			}
+			source(1, argv+i);
+		}
+	}
+}
+
+void
+tolocal(argc, argv)
+	int argc;
+	char *argv[];
+{
+	int i, len;
+	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;
+			bp = xmalloc(len);
+			(void)sprintf(bp, "exec %s%s%s %s %s", _PATH_CP,
+			    iamrecursive ? " -r" : "", pflag ? " -p" : "",
+			    argv[i], argv[argc - 1]);
+	  		if (verbose)
+			  fprintf(stderr, "Executing: %s\n", bp);
+			if (system(bp))
+				++errs;
+			(void)xfree(bp);
+			continue;
+		}
+		*src++ = 0;
+		if (*src == 0)
+			src = ".";
+		if ((host = strchr(argv[i], '@')) == NULL) {
+			host = argv[i];
+			suser = NULL;
+		} else {
+			*host++ = 0;
+			suser = argv[i];
+			if (*suser == '\0')
+				suser = pwd->pw_name;
+			else if (!okname(suser))
+				continue;
+		}
+		len = strlen(src) + CMDNEEDS + 20;
+	        bp = xmalloc(len);
+		(void)sprintf(bp, "%s -f %s", cmd, src);
+	  	if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
+		  (void)xfree(bp);
+		  ++errs;
+		  continue;
+		}
+	  	xfree(bp);
+		sink(1, argv + argc - 1);
+		(void)close(remin);
+		remin = remout = -1;
+	}
+}
+
+void
+source(argc, argv)
+	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[2048];
+
+	for (indx = 0; indx < argc; ++indx) {
+                name = argv[indx];
+		statbytes = 0;
+		if ((fd = open(name, O_RDONLY, 0)) < 0)
+			goto syserr;
+		if (fstat(fd, &stb) < 0) {
+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;
+		curfile = last;
+		if (pflag) {
+			/*
+			 * Make it compatible with possible future
+			 * versions expecting microseconds.
+			 */
+			(void)sprintf(buf, "T%lu 0 %lu 0\n",
+				      (unsigned long)stb.st_mtime, 
+				      (unsigned long)stb.st_atime);
+			(void)write(remout, buf, strlen(buf));
+			if (response() < 0)
+				goto next;
+		}
+#define	FILEMODEMASK	(S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
+		(void)sprintf(buf, "C%04o %lu %s\n",
+			      (unsigned int)(stb.st_mode & FILEMODEMASK), 
+			      (unsigned long)stb.st_size, 
+			      last);
+	        if (verbose)
+		  {
+		    fprintf(stderr, "Sending file modes: %s", buf);
+		    fflush(stderr);
+		  }
+		(void)write(remout, buf, strlen(buf));
+		if (response() < 0)
+			goto next;
+		if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
+next:			(void)close(fd);
+			continue;
+		}
+
+		if (showprogress) {
+			totalbytes = stb.st_size;
+			progressmeter(-1);
+		}
+
+		/* 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(remout, bp->buf, amt);
+			else {
+				result = write(remout, bp->buf, amt);
+				if (result != amt)
+					haderr = result >= 0 ? EIO : errno;
+				statbytes += result;
+			}
+		}
+		if(showprogress)
+			progressmeter(1);
+
+		if (close(fd) < 0 && !haderr)
+			haderr = errno;
+		if (!haderr)
+			(void)write(remout, "", 1);
+		else
+			run_err("%s: %s", name, strerror(haderr));
+		(void)response();
+	}
+}
+
+void
+rsource(name, statp)
+	char *name;
+	struct stat *statp;
+{
+	DIR *dirp;
+	struct dirent *dp;
+	char *last, *vect[1], path[1100];
+
+	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%lu 0 %lu 0\n",
+			      (unsigned long)statp->st_mtime, 
+			      (unsigned long)statp->st_atime);
+		(void)write(remout, path, strlen(path));
+		if (response() < 0) {
+			closedir(dirp);
+			return;
+		}
+	}
+	(void)sprintf(path, 
+	    "D%04o %d %.1024s\n", (unsigned int)(statp->st_mode & FILEMODEMASK),
+		      0, last);
+  	if (verbose)
+	  fprintf(stderr, "Entering directory: %s", path);
+	(void)write(remout, 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) >= sizeof(path) - 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(remout, "E\n", 2);
+	(void)response();
+}
+
+void
+sink(argc, argv)
+	int argc;
+	char *argv[];
+{
+	static BUF buffer;
+	struct stat stb;
+	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 = 0;
+	char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
+  	struct utimbuf ut;
+  	int dummy_usec;
+
+#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(remout, "", 1);
+	if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
+		targisdir = 1;
+	for (first = 1;; first = 0) {
+		cp = buf;
+		if (read(remin, cp, 1) <= 0)
+			return;
+		if (*cp++ == '\n')
+			SCREWUP("unexpected <newline>");
+		do {
+			if (read(remin, &ch, sizeof(ch)) != sizeof(ch))
+				SCREWUP("lost connection");
+			*cp++ = ch;
+		} while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
+		*cp = 0;
+
+		if (buf[0] == '\01' || buf[0] == '\02') {
+			if (iamremote == 0)
+				(void)write(STDERR_FILENO,
+				    buf + 1, strlen(buf + 1));
+			if (buf[0] == '\02')
+				exit(1);
+			++errs;
+			continue;
+		}
+		if (buf[0] == 'E') {
+			(void)write(remout, "", 1);
+			return;
+		}
+
+		if (ch == '\n')
+			*--cp = 0;
+
+#define getnum(t) (t) = 0; \
+  while (*cp >= '0' && *cp <= '9') (t) = (t) * 10 + (*cp++ - '0');
+		cp = buf;
+		if (*cp == 'T') {
+			setimes++;
+			cp++;
+			getnum(ut.modtime);
+			if (*cp++ != ' ')
+				SCREWUP("mtime.sec not delimited");
+			getnum(dummy_usec);
+			if (*cp++ != ' ')
+				SCREWUP("mtime.usec not delimited");
+			getnum(ut.actime);
+			if (*cp++ != ' ')
+				SCREWUP("atime.sec not delimited");
+			getnum(dummy_usec);
+			if (*cp++ != '\0')
+				SCREWUP("atime.usec not delimited");
+			(void)write(remout, "", 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; *cp >= '0' && *cp <= '9';)
+			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)
+			  namebuf = xmalloc(need);
+			(void)sprintf(namebuf, "%s%s%s", targ,
+			    *targ ? "/" : "", cp);
+			np = namebuf;
+		} else
+			np = targ;
+		curfile = cp;
+		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, mode | S_IRWXU) < 0)
+					goto bad;
+			}
+			vect[0] = np;
+			sink(1, vect);
+			if (setimes) {
+				setimes = 0;
+				if (utime(np, &ut) < 0)
+				    run_err("%s: set times: %s",
+					np, strerror(errno));
+			}
+			if (mod_flag)
+				(void)chmod(np, mode);
+			continue;
+		}
+		omode = mode;
+		mode |= S_IWRITE;
+		if ((ofd = open(np, O_WRONLY|O_CREAT|O_TRUNC, mode)) < 0) {
+bad:			run_err("%s: %s", np, strerror(errno));
+			continue;
+		}
+		(void)write(remout, "", 1);
+		if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
+			(void)close(ofd);
+			continue;
+		}
+		cp = bp->buf;
+		wrerr = NO;
+
+		if (showprogress) {
+			totalbytes = size;
+			progressmeter(-1);
+		}
+		statbytes = 0;
+		for (count = i = 0; i < size; i += 4096) {
+			amt = 4096;
+			if (i + amt > size)
+				amt = size - i;
+			count += amt;
+			do {
+				j = read(remin, cp, amt);
+				if (j <= 0) {
+					run_err("%s", j ? strerror(errno) :
+					    "dropped connection");
+					exit(1);
+				}
+				amt -= j;
+				cp += j;
+			statbytes += 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 (showprogress)
+			progressmeter(1);
+		if (count != 0 && wrerr == NO &&
+		    (j = write(ofd, bp->buf, count)) != count) {
+			wrerr = YES;
+			wrerrno = j >= 0 ? EIO : errno; 
+		}
+#if 0
+		if (ftruncate(ofd, size)) {
+			run_err("%s: truncate: %s", np, strerror(errno));
+			wrerr = DISPLAYED;
+		}
+#endif
+		if (pflag) {
+			if (exists || omode != mode)
+				if (fchmod(ofd, omode))
+					run_err("%s: set mode: %s",
+					    np, strerror(errno));
+		} else {
+			if (!exists && omode != mode)
+				if (fchmod(ofd, omode & ~mask))
+					run_err("%s: set mode: %s",
+					    np, strerror(errno));
+		}
+		(void)close(ofd);
+		(void)response();
+		if (setimes && wrerr == NO) {
+			setimes = 0;
+			if (utime(np, &ut) < 0) {
+				run_err("%s: set times: %s",
+				    np, strerror(errno));
+				wrerr = DISPLAYED;
+			}
+		}
+		switch(wrerr) {
+		case YES:
+			run_err("%s: %s", np, strerror(wrerrno));
+			break;
+		case NO:
+			(void)write(remout, "", 1);
+			break;
+		case DISPLAYED:
+			break;
+		}
+	}
+screwup:
+	run_err("protocol error: %s", why);
+	exit(1);
+}
+
+int
+response()
+{
+	char ch, *cp, resp, rbuf[2048];
+
+	if (read(remin, &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(remin, &ch, sizeof(ch)) != sizeof(ch))
+				lostconn(0);
+			*cp++ = ch;
+		} while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
+
+		if (!iamremote)
+			(void)write(STDERR_FILENO, rbuf, cp - rbuf);
+		++errs;
+		if (resp == 1)
+			return (-1);
+		exit(1);
+	}
+	/* NOTREACHED */
+}
+
+void
+usage()
+{
+	(void)fprintf(stderr,
+	    "usage: scp [-pqrvC] [-P port] [-c cipher] [-i identity] f1 f2; or:\n       scp [options] f1 ... fn directory\n");
+	exit(1);
+}
+
+void
+run_err(const char *fmt, ...)
+{
+	static FILE *fp;
+	va_list ap;
+	va_start(ap, fmt);
+
+	++errs;
+	if (fp == NULL && !(fp = fdopen(remout, "w")))
+		return;
+	(void)fprintf(fp, "%c", 0x01);
+	(void)fprintf(fp, "scp: ");
+	(void)vfprintf(fp, fmt, ap);
+	(void)fprintf(fp, "\n");
+	(void)fflush(fp);
+
+	if (!iamremote)
+	  {
+	    vfprintf(stderr, fmt, ap);
+	    fprintf(stderr, "\n");
+	  }
+
+	va_end(ap);
+}
+
+/* Stuff below is from BSD rcp util.c. */
+
+/*-
+ * Copyright (c) 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.
+ *
+ *	$Id: scp.c,v 1.1 1999/10/27 03:42:45 damien Exp $
+ */
+
+char *
+colon(cp)
+	char *cp;
+{
+	if (*cp == ':')		/* Leading colon is part of file name. */
+		return (0);
+
+	for (; *cp; ++cp) {
+		if (*cp == ':')
+			return (cp);
+		if (*cp == '/')
+			return (0);
+	}
+	return (0);
+}
+
+void
+verifydir(cp)
+	char *cp;
+{
+	struct stat stb;
+
+	if (!stat(cp, &stb)) {
+		if (S_ISDIR(stb.st_mode))
+			return;
+		errno = ENOTDIR;
+	}
+	run_err("%s: %s", cp, strerror(errno));
+	exit(1);
+}
+
+int
+okname(cp0)
+	char *cp0;
+{
+	int c;
+	char *cp;
+
+	cp = cp0;
+	do {
+		c = *cp;
+		if (c & 0200)
+			goto bad;
+		if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
+			goto bad;
+	} while (*++cp);
+	return (1);
+
+bad:	fprintf(stderr, "%s: invalid user name", cp0);
+	return (0);
+}
+
+BUF *
+allocbuf(bp, fd, blksize)
+	BUF *bp;
+	int fd, blksize;
+{
+	size_t size;
+	struct stat stb;
+
+	if (fstat(fd, &stb) < 0) {
+		run_err("fstat: %s", strerror(errno));
+		return (0);
+	}
+        if (stb.st_blksize == 0)
+	  size = blksize;
+        else
+  	  size = blksize + (stb.st_blksize - blksize % stb.st_blksize) %
+	    stb.st_blksize;
+	if (bp->cnt >= size)
+		return (bp);
+  	if (bp->buf == NULL)
+	  bp->buf = xmalloc(size);
+  	else
+	  bp->buf = xrealloc(bp->buf, size);
+	bp->cnt = size;
+	return (bp);
+}
+
+void
+lostconn(signo)
+	int signo;
+{
+	if (!iamremote)
+		fprintf(stderr, "lost connection\n");
+	exit(1);
+}
+
+/*
+ * ensure all of data on socket comes through. f==read || f==write
+ */
+int
+atomicio(f, fd, s, n)
+int (*f)();
+char *s;
+{
+	int res, pos = 0;
+
+	while (n>pos) {
+		res = (f)(fd, s+pos, n-pos);
+		switch (res) {
+		case -1:
+			if (errno==EINTR || errno==EAGAIN)
+				continue;
+		case 0:
+			return (res);
+		default:
+			pos += res;
+		}
+	}
+	return (pos);
+}
+
+void
+alarmtimer(int wait)
+{
+   struct itimerval itv;
+
+   itv.it_value.tv_sec = wait;
+   itv.it_value.tv_usec = 0;
+   itv.it_interval = itv.it_value;
+   setitimer(ITIMER_REAL, &itv, NULL);
+}
+
+void
+updateprogressmeter(void)
+{
+	int save_errno = errno;
+
+	progressmeter(0);
+	errno = save_errno;
+}
+
+void
+progressmeter(int flag)
+{
+	static const char prefixes[] = " KMGTP";
+	static struct timeval lastupdate;
+	static off_t lastsize;
+	struct timeval now, td, wait;
+	off_t cursize, abbrevsize;
+	double elapsed;
+	int ratio, barlength, i, remaining;
+	char buf[256];
+
+	if (flag == -1) {
+		(void)gettimeofday(&start, (struct timezone *)0);
+		lastupdate = start;
+		lastsize = 0;
+	}   
+	(void)gettimeofday(&now, (struct timezone *)0);
+	cursize = statbytes;
+	if (totalbytes != 0) {
+		ratio = cursize * 100 / totalbytes;
+		ratio = MAX(ratio, 0);
+		ratio = MIN(ratio, 100);
+	}
+	else
+		ratio = 100;
+
+	snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio); 
+
+	barlength = getttywidth() - 51;
+	if (barlength > 0) {
+		i = barlength * ratio / 100;
+		snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
+		"|%.*s%*s|", i,
+"*****************************************************************************"
+"*****************************************************************************",
+                 barlength - i, "");
+	}
+
+	i = 0;
+	abbrevsize = cursize;
+	while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
+		i++;
+		abbrevsize >>= 10;
+	}
+	snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5qd %c%c ",
+	    (quad_t)abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
+	    'B');
+
+	timersub(&now, &lastupdate, &wait);
+	if (cursize > lastsize) {
+		lastupdate = now;
+		lastsize = cursize;
+		if (wait.tv_sec >= STALLTIME) {
+			start.tv_sec += wait.tv_sec;
+			start.tv_usec += wait.tv_usec;
+		}
+		wait.tv_sec = 0;
+	}
+
+	timersub(&now, &start, &td);
+	elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
+
+	if (statbytes <= 0 || elapsed <= 0.0 || cursize > totalbytes) {
+		snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
+		    "   --:-- ETA");
+	} else if (wait.tv_sec >= STALLTIME) {
+		snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
+		    " - stalled -");
+	} else {
+		remaining = (int)(totalbytes / (statbytes / elapsed) - elapsed);
+		i = elapsed / 3600;
+		if (i)
+			snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
+			    "%2d:", i);
+		else
+			snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
+			    "   ");
+		i = remaining % 3600;
+		snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
+		    "%02d:%02d ETA", i / 60, i % 60);
+	}
+	atomicio(write, fileno(stdout), buf, strlen(buf));
+
+	if (flag == -1) {
+		signal(SIGALRM, (void *)updateprogressmeter);
+		alarmtimer(1);
+	} else if (flag == 1) {
+		alarmtimer(0);
+		write(fileno(stdout), "\n", 1);
+		statbytes = 0;
+	}
+}
+
+int
+getttywidth(void)
+{
+	struct winsize winsize;
+
+	if (ioctl(fileno(stdout), TIOCG