]> andersk Git - openssh.git/blobdiff - scp.c
- markus@cvs.openbsd.org 2002/06/10 22:28:41
[openssh.git] / scp.c
diff --git a/scp.c b/scp.c
index 3455b165c7b4f24006f72c1fc48b0fac14f7ce3e..860dc108bd2cd72c92b6f69a58396338cc3a66eb 100644 (file)
--- a/scp.c
+++ b/scp.c
@@ -1,16 +1,46 @@
 /*
+ * scp - secure remote copy.  This is basically patched BSD rcp which
+ * uses ssh to do the data transfer (instead of using rcmd).
  *
- * 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.)
+ * 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>
  *
-*/
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose.  Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
+ */
+/*
+ * Copyright (c) 1999 Theo de Raadt.  All rights reserved.
+ * Copyright (c) 1999 Aaron Campbell.  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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
 
 /*
+ * Parts from:
+ *
  * Copyright (c) 1983, 1990, 1992, 1993, 1995
  *     The Regents of the University of California.  All rights reserved.
  *
  */
 
 #include "includes.h"
-RCSID("$Id$");
+RCSID("$OpenBSD: scp.c,v 1.89 2002/06/08 12:36:53 markus Exp $");
 
-#include "ssh.h"
 #include "xmalloc.h"
-#include <utime.h>
-
-#define _PATH_CP "cp"
+#include "atomicio.h"
+#include "pathnames.h"
+#include "log.h"
+#include "misc.h"
+
+#ifdef HAVE___PROGNAME
+extern char *__progname;
+#else
+char *__progname;
+#endif
 
 /* For progressmeter() -- number of seconds before xfer considered "stalled" */
 #define STALLTIME      5
+/* alarm() interval for updating progress meter */
+#define PROGRESSTIME   1
 
 /* Visual statistics about files as they are transferred. */
 void progressmeter(int);
 
 /* Returns width of the terminal (for progress meter calculations). */
 int getttywidth(void);
+int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc);
+
+/* Struct for addargs */
+arglist args;
 
 /* Time a transfer started. */
 static struct timeval start;
 
 /* Number of bytes of current file transferred so far. */
-volatile unsigned long statbytes;
+volatile off_t statbytes;
 
 /* Total size of current file. */
 off_t totalbytes = 0;
@@ -74,34 +116,14 @@ off_t totalbytes = 0;
 /* Name of current file being transferred. */
 char *curfile;
 
-/* This is set to non-zero if IPv4 is desired. */
-int IPv4 = 0;
-
-/* This is set to non-zero if IPv6 is desired. */
-int IPv6 = 0;
-
 /* This is set to non-zero to enable verbose mode. */
 int verbose_mode = 0;
 
-/* This is set to non-zero if compression is desired. */
-int compress_flag = 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 is the program to execute for the secured connection. ("ssh" or -S) */
+char *ssh_program = _PATH_SSH_PROGRAM;
 
 /*
  * This function executes the given command as the specified user on the
@@ -110,13 +132,15 @@ char *port = NULL;
  */
 
 int
-do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
+do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
 {
        int pin[2], pout[2], reserved[2];
 
        if (verbose_mode)
-               fprintf(stderr, "Executing: host %s, user %s, command %s\n",
-                       host, remuser ? remuser : "(unspecified)", cmd);
+               fprintf(stderr,
+                   "Executing: program %s host %s, user %s, command %s\n",
+                   ssh_program, host,
+                   remuser ? remuser : "(unspecified)", cmd);
 
        /*
         * Reserve two descriptors so that the real pipes won't get
@@ -135,10 +159,7 @@ do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
        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;
-
+       if (fork() == 0)  {
                /* Child. */
                close(pin[1]);
                close(pout[0]);
@@ -147,42 +168,14 @@ do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
                close(pin[0]);
                close(pout[1]);
 
-               i = 0;
-               args[i++] = SSH_PROGRAM;
-               args[i++] = "-x";
-               args[i++] = "-oFallBackToRsh no";
-               if (IPv4)
-                       args[i++] = "-4";
-               if (IPv6)
-                       args[i++] = "-6";
-               if (verbose_mode)
-                       args[i++] = "-v";
-               if (compress_flag)
-                       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;
+               args.list[0] = ssh_program;
+               if (remuser != NULL)
+                       addargs(&args, "-l%s", remuser);
+               addargs(&args, "%s", host);
+               addargs(&args, "%s", cmd);
 
-               execvp(SSH_PROGRAM, args);
-               perror(SSH_PROGRAM);
+               execvp(ssh_program, args.list);
+               perror(ssh_program);
                exit(1);
        }
        /* Parent.  Close the other side, and return the local side. */
@@ -193,38 +186,18 @@ do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
        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;
@@ -251,25 +224,52 @@ main(argc, argv)
        extern char *optarg;
        extern int optind;
 
+       __progname = get_progname(argv[0]);
+
+       args.list = NULL;
+       addargs(&args, "ssh");          /* overwritten with ssh_program */
+       addargs(&args, "-x");
+       addargs(&args, "-oForwardAgent no");
+       addargs(&args, "-oClearAllForwardings yes");
+
        fflag = tflag = 0;
-       while ((ch = getopt(argc, argv, "dfprtvBCc:i:P:q46")) != EOF)
+       while ((ch = getopt(argc, argv, "dfprtvBCc:i:P:q46S:o:F:")) != -1)
                switch (ch) {
                /* User-visible flags. */
                case '4':
-                       IPv4 = 1;
-                       break;
                case '6':
-                       IPv6 = 1;
+               case 'C':
+                       addargs(&args, "-%c", ch);
                        break;
-               case 'p':
-                       pflag = 1;
+               case 'o':
+               case 'c':
+               case 'i':
+               case 'F':
+                       addargs(&args, "-%c%s", ch, optarg);
                        break;
                case 'P':
-                       port = optarg;
+                       addargs(&args, "-p%s", optarg);
+                       break;
+               case 'B':
+                       addargs(&args, "-oBatchmode yes");
+                       break;
+               case 'p':
+                       pflag = 1;
                        break;
                case 'r':
                        iamrecursive = 1;
                        break;
+               case 'S':
+                       ssh_program = xstrdup(optarg);
+                       break;
+               case 'v':
+                       addargs(&args, "-v");
+                       verbose_mode = 1;
+                       break;
+               case 'q':
+                       showprogress = 0;
+                       break;
+
                /* Server options. */
                case 'd':
                        targetshouldbedirectory = 1;
@@ -281,26 +281,10 @@ main(argc, argv)
                case 't':       /* "to" */
                        iamremote = 1;
                        tflag = 1;
+#ifdef HAVE_CYGWIN
+                       setmode(0, O_BINARY);
+#endif
                        break;
-               case 'c':
-                       cipher = optarg;
-                       break;
-               case 'i':
-                       identity = optarg;
-                       break;
-               case 'v':
-                       verbose_mode = 1;
-                       break;
-               case 'B':
-                       batchmode = 1;
-                       break;
-               case 'C':
-                       compress_flag = 1;
-                       break;
-               case 'q':
-                       showprogress = 0;
-                       break;
-               case '?':
                default:
                        usage();
                }
@@ -316,7 +300,7 @@ main(argc, argv)
        remin = STDIN_FILENO;
        remout = STDOUT_FILENO;
 
-       if (fflag) {    
+       if (fflag) {
                /* Follow "protocol", send data. */
                (void) response();
                source(argc, argv);
@@ -334,9 +318,10 @@ main(argc, argv)
 
        remin = remout = -1;
        /* Command to be executed on remote system using "ssh". */
-       (void) sprintf(cmd, "scp%s%s%s%s", verbose_mode ? " -v" : "",
-                      iamrecursive ? " -r" : "", pflag ? " -p" : "",
-                      targetshouldbedirectory ? " -d" : "");
+       (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
+           verbose_mode ? " -v" : "",
+           iamrecursive ? " -r" : "", pflag ? " -p" : "",
+           targetshouldbedirectory ? " -d" : "");
 
        (void) signal(SIGPIPE, lostconn);
 
@@ -350,17 +335,6 @@ main(argc, argv)
        exit(errs != 0);
 }
 
-char *
-cleanhostname(host)
-       char *host;
-{
-       if (*host == '[' && host[strlen(host) - 1] == ']') {
-               host[strlen(host) - 1] = '\0';
-               return (host + 1);
-       } else
-               return host;
-}
-
 void
 toremote(targ, argc, argv)
        char *targ, *argv[];
@@ -389,13 +363,16 @@ toremote(targ, argc, argv)
        for (i = 0; i < argc - 1; i++) {
                src = colon(argv[i]);
                if (src) {      /* remote to remote */
+                       static char *ssh_options =
+                           "-x -o'ClearAllForwardings yes'";
                        *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;
+                       len = strlen(ssh_program) + strlen(argv[i]) +
+                           strlen(src) + (tuser ? strlen(tuser) : 0) +
+                           strlen(thost) + strlen(targ) +
+                           strlen(ssh_options) + CMDNEEDS + 20;
                        bp = xmalloc(len);
                        if (host) {
                                *host++ = 0;
@@ -405,20 +382,22 @@ toremote(targ, argc, argv)
                                        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_mode ? " -v" : "",
-                                              suser, host, cmd, src,
-                                              tuser ? tuser : "", tuser ? "@" : "",
-                                              thost, targ);
+                               snprintf(bp, len,
+                                   "%s%s %s -n "
+                                   "-l %s %s %s %s '%s%s%s:%s'",
+                                   ssh_program, verbose_mode ? " -v" : "",
+                                   ssh_options, suser, host, cmd, src,
+                                   tuser ? tuser : "", tuser ? "@" : "",
+                                   thost, targ);
                        } else {
                                host = cleanhostname(argv[i]);
-                               (void) sprintf(bp,
-                                              "exec %s%s -x -o'FallBackToRsh no' -n %s %s %s '%s%s%s:%s'",
-                                              SSH_PROGRAM, verbose_mode ? " -v" : "",
-                                              host, cmd, src,
-                                              tuser ? tuser : "", tuser ? "@" : "",
-                                              thost, targ);
+                               snprintf(bp, len,
+                                   "exec %s%s %s -n %s "
+                                   "%s %s '%s%s%s:%s'",
+                                   ssh_program, verbose_mode ? " -v" : "",
+                                   ssh_options, host, cmd, src,
+                                   tuser ? tuser : "", tuser ? "@" : "",
+                                   thost, targ);
                        }
                        if (verbose_mode)
                                fprintf(stderr, "Executing: %s\n", bp);
@@ -428,10 +407,10 @@ toremote(targ, argc, argv)
                        if (remin == -1) {
                                len = strlen(targ) + CMDNEEDS + 20;
                                bp = xmalloc(len);
-                               (void) sprintf(bp, "%s -t %s", cmd, targ);
+                               (void) snprintf(bp, len, "%s -t %s", cmd, targ);
                                host = cleanhostname(thost);
-                               if (do_cmd(host, tuser,
-                                          bp, &remin, &remout) < 0)
+                               if (do_cmd(host, tuser, bp, &remin,
+                                   &remout, argc) < 0)
                                        exit(1);
                                if (response() < 0)
                                        exit(1);
@@ -453,11 +432,11 @@ tolocal(argc, argv)
        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;
+                           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]);
+                       (void) snprintf(bp, len, "exec %s%s%s %s %s", _PATH_CP,
+                           iamrecursive ? " -r" : "", pflag ? " -p" : "",
+                           argv[i], argv[argc - 1]);
                        if (verbose_mode)
                                fprintf(stderr, "Executing: %s\n", bp);
                        if (system(bp))
@@ -482,8 +461,8 @@ tolocal(argc, argv)
                host = cleanhostname(host);
                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) snprintf(bp, len, "%s -f %s", cmd, src);
+               if (do_cmd(host, suser, bp, &remin, &remout, argc) < 0) {
                        (void) xfree(bp);
                        ++errs;
                        continue;
@@ -503,13 +482,22 @@ source(argc, argv)
        struct stat stb;
        static BUF buffer;
        BUF *bp;
-       off_t i;
-       int amt, fd, haderr, indx, result;
+       off_t i, amt, result;
+       int fd, haderr, indx;
        char *last, *name, buf[2048];
+       int len;
 
        for (indx = 0; indx < argc; ++indx) {
                name = argv[indx];
                statbytes = 0;
+               len = strlen(name);
+               while (len > 1 && name[len-1] == '/')
+                       name[--len] = '\0';
+               if (strchr(name, '\n') != NULL) {
+                       run_err("%s: skipping, filename contains a newline",
+                           name);
+                       goto next;
+               }
                if ((fd = open(name, O_RDONLY, 0)) < 0)
                        goto syserr;
                if (fstat(fd, &stb) < 0) {
@@ -539,18 +527,24 @@ syserr:                   run_err("%s: %s", name, strerror(errno));
                         * 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) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
+                           (u_long) stb.st_mtime,
+                           (u_long) stb.st_atime);
                        (void) atomicio(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);
+#ifdef HAVE_LONG_LONG_INT
+               snprintf(buf, sizeof buf, "C%04o %lld %s\n",
+                   (u_int) (stb.st_mode & FILEMODEMASK),
+                   (long long)stb.st_size, last);
+#else
+               /* XXX: Handle integer overflow? */
+               snprintf(buf, sizeof buf, "C%04o %lu %s\n",
+                   (u_int) (stb.st_mode & FILEMODEMASK),
+                   (u_long) stb.st_size, last);
+#endif
                if (verbose_mode) {
                        fprintf(stderr, "Sending file modes: %s", buf);
                        fflush(stderr);
@@ -617,18 +611,17 @@ rsource(name, statp)
        else
                last++;
        if (pflag) {
-               (void) sprintf(path, "T%lu 0 %lu 0\n",
-                              (unsigned long) statp->st_mtime,
-                              (unsigned long) statp->st_atime);
+               (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
+                   (u_long) statp->st_mtime,
+                   (u_long) statp->st_atime);
                (void) atomicio(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);
+       (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
+           (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
        if (verbose_mode)
                fprintf(stderr, "Entering directory: %s", path);
        (void) atomicio(write, remout, path, strlen(path));
@@ -636,7 +629,7 @@ rsource(name, statp)
                closedir(dirp);
                return;
        }
-       while ((dp = readdir(dirp))) {
+       while ((dp = readdir(dirp)) != NULL) {
                if (dp->d_ino == 0)
                        continue;
                if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
@@ -645,7 +638,7 @@ rsource(name, statp)
                        run_err("%s/%s: name too long", name, dp->d_name);
                        continue;
                }
-               (void) sprintf(path, "%s/%s", name, dp->d_name);
+               (void) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
                vect[0] = path;
                source(1, vect);
        }
@@ -667,12 +660,14 @@ sink(argc, argv)
        BUF *bp;
        off_t i, j;
        int amt, count, exists, first, mask, mode, ofd, omode;
-       int setimes, size, targisdir, wrerrno = 0;
+       off_t size;
+       int setimes, targisdir, wrerrno = 0;
        char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
-       struct utimbuf ut;
-       int dummy_usec;
+       struct timeval tv[2];
 
-#define        SCREWUP(str)    { why = str; goto screwup; }
+#define        atime   tv[0]
+#define        mtime   tv[1]
+#define        SCREWUP(str)    do { why = str; goto screwup; } while (0)
 
        setimes = targisdir = 0;
        mask = umask(0);
@@ -705,7 +700,7 @@ sink(argc, argv)
                if (buf[0] == '\01' || buf[0] == '\02') {
                        if (iamremote == 0)
                                (void) atomicio(write, STDERR_FILENO,
-                                            buf + 1, strlen(buf + 1));
+                                   buf + 1, strlen(buf + 1));
                        if (buf[0] == '\02')
                                exit(1);
                        ++errs;
@@ -718,23 +713,21 @@ sink(argc, argv)
                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++ != ' ')
+                       mtime.tv_sec = strtol(cp, &cp, 10);
+                       if (!cp || *cp++ != ' ')
                                SCREWUP("mtime.sec not delimited");
-                       getnum(dummy_usec);
-                       if (*cp++ != ' ')
+                       mtime.tv_usec = strtol(cp, &cp, 10);
+                       if (!cp || *cp++ != ' ')
                                SCREWUP("mtime.usec not delimited");
-                       getnum(ut.actime);
-                       if (*cp++ != ' ')
+                       atime.tv_sec = strtol(cp, &cp, 10);
+                       if (!cp || *cp++ != ' ')
                                SCREWUP("atime.sec not delimited");
-                       getnum(dummy_usec);
-                       if (*cp++ != '\0')
+                       atime.tv_usec = strtol(cp, &cp, 10);
+                       if (!cp || *cp++ != '\0')
                                SCREWUP("atime.usec not delimited");
                        (void) atomicio(write, remout, "", 1);
                        continue;
@@ -762,7 +755,7 @@ sink(argc, argv)
                if (*cp++ != ' ')
                        SCREWUP("mode not delimited");
 
-               for (size = 0; *cp >= '0' && *cp <= '9';)
+               for (size = 0; isdigit(*cp);)
                        size = size * 10 + (*cp++ - '0');
                if (*cp++ != ' ')
                        SCREWUP("size not delimited");
@@ -772,10 +765,14 @@ sink(argc, argv)
                        size_t need;
 
                        need = strlen(targ) + strlen(cp) + 250;
-                       if (need > cursize)
+                       if (need > cursize) {
+                               if (namebuf)
+                                       xfree(namebuf);
                                namebuf = xmalloc(need);
-                       (void) sprintf(namebuf, "%s%s%s", targ,
-                                      *targ ? "/" : "", cp);
+                               cursize = need;
+                       }
+                       (void) snprintf(namebuf, need, "%s%s%s", targ,
+                           strcmp(targ, "/") ? "/" : "", cp);
                        np = namebuf;
                } else
                        np = targ;
@@ -797,21 +794,23 @@ sink(argc, argv)
                                if (mkdir(np, mode | S_IRWXU) < 0)
                                        goto bad;
                        }
-                       vect[0] = np;
+                       vect[0] = xstrdup(np);
                        sink(1, vect);
                        if (setimes) {
                                setimes = 0;
-                               if (utime(np, &ut) < 0)
+                               if (utimes(vect[0], tv) < 0)
                                        run_err("%s: set times: %s",
-                                               np, strerror(errno));
+                                           vect[0], strerror(errno));
                        }
                        if (mod_flag)
-                               (void) chmod(np, mode);
+                               (void) chmod(vect[0], mode);
+                       if (vect[0])
+                               xfree(vect[0]);
                        continue;
                }
                omode = mode;
                mode |= S_IWRITE;
-               if ((ofd = open(np, O_WRONLY | O_CREAT | O_TRUNC, mode)) < 0) {
+               if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
 bad:                   run_err("%s: %s", np, strerror(errno));
                        continue;
                }
@@ -834,10 +833,13 @@ bad:                      run_err("%s: %s", np, strerror(errno));
                                amt = size - i;
                        count += amt;
                        do {
-                               j = atomicio(read, remin, cp, amt);
-                               if (j <= 0) {
+                               j = read(remin, cp, amt);
+                               if (j == -1 && (errno == EINTR ||
+                                   errno == EAGAIN)) {
+                                       continue;
+                               } else if (j <= 0) {
                                        run_err("%s", j ? strerror(errno) :
-                                               "dropped connection");
+                                           "dropped connection");
                                        exit(1);
                                }
                                amt -= j;
@@ -864,30 +866,39 @@ bad:                      run_err("%s: %s", np, strerror(errno));
                        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)
+#ifdef HAVE_FCHMOD
                                if (fchmod(ofd, omode))
+#else /* HAVE_FCHMOD */
+                               if (chmod(np, omode))
+#endif /* HAVE_FCHMOD */
                                        run_err("%s: set mode: %s",
-                                               np, strerror(errno));
+                                           np, strerror(errno));
                } else {
                        if (!exists && omode != mode)
+#ifdef HAVE_FCHMOD
                                if (fchmod(ofd, omode & ~mask))
+#else /* HAVE_FCHMOD */
+                               if (chmod(np, omode & ~mask))
+#endif /* HAVE_FCHMOD */
                                        run_err("%s: set mode: %s",
-                                               np, strerror(errno));
+                                           np, strerror(errno));
+               }
+               if (close(ofd) == -1) {
+                       wrerr = YES;
+                       wrerrno = errno;
                }
-               (void) close(ofd);
                (void) response();
                if (setimes && wrerr == NO) {
                        setimes = 0;
-                       if (utime(np, &ut) < 0) {
+                       if (utimes(np, tv) < 0) {
                                run_err("%s: set times: %s",
-                                       np, strerror(errno));
+                                   np, strerror(errno));
                                wrerr = DISPLAYED;
                        }
                }
@@ -908,7 +919,7 @@ screwup:
 }
 
 int
-response()
+response(void)
 {
        char ch, *cp, resp, rbuf[2048];
 
@@ -941,10 +952,12 @@ response()
 }
 
 void
-usage()
+usage(void)
 {
        (void) fprintf(stderr,
-                      "usage: scp [-pqrvC46] [-P port] [-c cipher] [-i identity] f1 f2; or:\n       scp [options] f1 ... fn directory\n");
+           "usage: scp [-pqrvBC46] [-F config] [-S ssh] [-P port] [-c cipher] [-i identity]\n"
+           "           [-o option] f1 f2\n"
+           "   or: scp [options] f1 ... fn directory\n");
        exit(1);
 }
 
@@ -973,67 +986,6 @@ run_err(const char *fmt,...)
        }
 }
 
-/* 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.
- *
- *     $Id$
- */
-
-char *
-colon(cp)
-       char *cp;
-{
-       int flag = 0;
-
-       if (*cp == ':')         /* Leading colon is part of file name. */
-               return (0);
-       if (*cp == '[')
-               flag = 1;
-
-       for (; *cp; ++cp) {
-               if (*cp == '@' && *(cp+1) == '[')
-                       flag = 1;
-               if (*cp == ']' && *(cp+1) == ':' && flag)
-                       return (cp+1);
-               if (*cp == ':' && !flag)
-                       return (cp);
-               if (*cp == '/')
-                       return (0);
-       }
-       return (0);
-}
-
 void
 verifydir(cp)
        char *cp;
@@ -1058,10 +1010,11 @@ okname(cp0)
 
        cp = cp0;
        do {
-               c = *cp;
+               c = (int)*cp;
                if (c & 0200)
                        goto bad;
-               if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
+               if (!isalpha(c) && !isdigit(c) &&
+                   c != '_' && c != '-' && c != '.' && c != '+')
                        goto bad;
        } while (*++cp);
        return (1);
@@ -1076,6 +1029,7 @@ allocbuf(bp, fd, blksize)
        int fd, blksize;
 {
        size_t size;
+#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
        struct stat stb;
 
        if (fstat(fd, &stb) < 0) {
@@ -1086,13 +1040,17 @@ allocbuf(bp, fd, blksize)
                size = blksize;
        else
                size = blksize + (stb.st_blksize - blksize % stb.st_blksize) %
-                       stb.st_blksize;
+                   stb.st_blksize;
+#else /* HAVE_STRUCT_STAT_ST_BLKSIZE */
+       size = blksize;
+#endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */
        if (bp->cnt >= size)
                return (bp);
        if (bp->buf == NULL)
                bp->buf = xmalloc(size);
        else
                bp->buf = xrealloc(bp->buf, size);
+       memset(bp->buf, 0, size);
        bp->cnt = size;
        return (bp);
 }
@@ -1102,33 +1060,26 @@ lostconn(signo)
        int signo;
 {
        if (!iamremote)
-               fprintf(stderr, "lost connection\n");
-       exit(1);
-}
-
-
-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);
+               write(STDERR_FILENO, "lost connection\n", 16);
+       if (signo)
+               _exit(1);
+       else
+               exit(1);
 }
 
-void
+static void
 updateprogressmeter(int ignore)
 {
        int save_errno = errno;
 
        progressmeter(0);
+       signal(SIGALRM, updateprogressmeter);
+       alarm(PROGRESSTIME);
        errno = save_errno;
 }
 
-int
-foregroundproc()
+static int
+foregroundproc(void)
 {
        static pid_t pgrp = -1;
        int ctty_pgrp;
@@ -1136,8 +1087,13 @@ foregroundproc()
        if (pgrp == -1)
                pgrp = getpgrp();
 
+#ifdef HAVE_TCGETPGRP
+       return ((ctty_pgrp = tcgetpgrp(STDOUT_FILENO)) != -1 &&
+               ctty_pgrp == pgrp);
+#else
        return ((ioctl(STDOUT_FILENO, TIOCGPGRP, &ctty_pgrp) != -1 &&
                 ctty_pgrp == pgrp));
+#endif
 }
 
 void
@@ -1150,7 +1106,7 @@ progressmeter(int flag)
        off_t cursize, abbrevsize;
        double elapsed;
        int ratio, barlength, i, remaining;
-       char buf[256];
+       char buf[512];
 
        if (flag == -1) {
                (void) gettimeofday(&start, (struct timezone *) 0);
@@ -1175,10 +1131,15 @@ progressmeter(int flag)
        if (barlength > 0) {
                i = barlength * ratio / 100;
                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
-                        "|%.*s%*s|", i,
-                        "*****************************************************************************"
-                        "*****************************************************************************",
-                        barlength - i, "");
+                   "|%.*s%*s|", i,
+                   "*******************************************************"
+                   "*******************************************************"
+                   "*******************************************************"
+                   "*******************************************************"
+                   "*******************************************************"
+                   "*******************************************************"
+                   "*******************************************************",
+                   barlength - i, "");
        }
        i = 0;
        abbrevsize = cursize;
@@ -1186,9 +1147,9 @@ progressmeter(int flag)
                i++;
                abbrevsize >>= 10;
        }
-       snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
-            (int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
-                'B');
+       snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5lu %c%c ",
+           (unsigned long) abbrevsize, prefixes[i],
+           prefixes[i] == ' ' ? ' ' : 'B');
 
        timersub(&now, &lastupdate, &wait);
        if (cursize > lastsize) {
@@ -1203,44 +1164,39 @@ progressmeter(int flag)
        timersub(&now, &start, &td);
        elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
 
-       if (statbytes <= 0 || elapsed <= 0.0 || cursize > totalbytes) {
+       if (flag != 1 &&
+           (statbytes <= 0 || elapsed <= 0.0 || cursize > totalbytes)) {
                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
-                        "   --:-- ETA");
+                   "   --:-- ETA");
        } else if (wait.tv_sec >= STALLTIME) {
                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
-                        " - stalled -");
+                   " - stalled -");
        } else {
                if (flag != 1)
-                       remaining =
-                           (int)(totalbytes / (statbytes / elapsed) - elapsed);
+                       remaining = (int)(totalbytes / (statbytes / elapsed) -
+                           elapsed);
                else
                        remaining = elapsed;
 
                i = remaining / 3600;
                if (i)
                        snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
-                                "%2d:", i);
+                           "%2d:", i);
                else
                        snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
-                                "   ");
+                           "   ");
                i = remaining % 3600;
                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
-                        "%02d:%02d%s", i / 60, i % 60,
-                        (flag != 1) ? " ETA" : "    ");
+                   "%02d:%02d%s", i / 60, i % 60,
+                   (flag != 1) ? " ETA" : "    ");
        }
        atomicio(write, fileno(stdout), buf, strlen(buf));
 
        if (flag == -1) {
-               struct sigaction sa;
-               sa.sa_handler = updateprogressmeter;
-               sigemptyset(&sa.sa_mask);
-#ifdef SA_RESTART
-               sa.sa_flags = SA_RESTART;
-#endif
-               sigaction(SIGALRM, &sa, NULL);
-               alarmtimer(1);
+               mysignal(SIGALRM, updateprogressmeter);
+               alarm(PROGRESSTIME);
        } else if (flag == 1) {
-               alarmtimer(0);
+               alarm(0);
                atomicio(write, fileno(stdout), "\n", 1);
                statbytes = 0;
        }
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