1124 lines
26 KiB
C
1124 lines
26 KiB
C
/* $NetBSD: scp.c,v 1.20 2003/04/03 06:21:34 itojun Exp $ */
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/*
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* scp - secure remote copy. This is basically patched BSD rcp which
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* uses ssh to do the data transfer (instead of using rcmd).
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*
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* NOTE: This version should NOT be suid root. (This uses ssh to
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* do the transfer and ssh has the necessary privileges.)
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*
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* 1995 Timo Rinne <tri@iki.fi>, Tatu Ylonen <ylo@cs.hut.fi>
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*
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* As far as I am concerned, the code I have written for this software
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* can be used freely for any purpose. Any derived versions of this
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* software must be clearly marked as such, and if the derived work is
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* incompatible with the protocol description in the RFC file, it must be
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* called by a name other than "ssh" or "Secure Shell".
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*/
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/*
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* Copyright (c) 1999 Theo de Raadt. All rights reserved.
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* Copyright (c) 1999 Aaron Campbell. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Parts from:
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*
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* Copyright (c) 1983, 1990, 1992, 1993, 1995
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include "includes.h"
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RCSID("$OpenBSD: scp.c,v 1.102 2003/03/05 22:33:43 markus Exp $");
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#include "xmalloc.h"
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#include "atomicio.h"
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#include "pathnames.h"
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#include "log.h"
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#include "misc.h"
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#include "progressmeter.h"
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int do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc);
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void bwlimit(int);
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/* Struct for addargs */
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arglist args;
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/* Bandwidth limit */
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off_t limit = 0;
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/* Name of current file being transferred. */
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char *curfile;
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/* This is set to non-zero to enable verbose mode. */
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int verbose_mode = 0;
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/* This is set to zero if the progressmeter is not desired. */
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int showprogress = 1;
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/* This is the program to execute for the secured connection. ("ssh" or -S) */
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char *ssh_program = _PATH_SSH_PROGRAM;
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/* This is used to store the pid of ssh_program */
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pid_t do_cmd_pid;
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/*
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* This function executes the given command as the specified user on the
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* given host. This returns < 0 if execution fails, and >= 0 otherwise. This
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* assigns the input and output file descriptors on success.
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*/
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int
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do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout, int argc)
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{
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int pin[2], pout[2], reserved[2];
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if (verbose_mode)
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fprintf(stderr,
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"Executing: program %s host %s, user %s, command %s\n",
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ssh_program, host,
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remuser ? remuser : "(unspecified)", cmd);
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/*
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* Reserve two descriptors so that the real pipes won't get
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* descriptors 0 and 1 because that will screw up dup2 below.
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*/
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pipe(reserved);
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/* Create a socket pair for communicating with ssh. */
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if (pipe(pin) < 0)
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fatal("pipe: %s", strerror(errno));
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if (pipe(pout) < 0)
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fatal("pipe: %s", strerror(errno));
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/* Free the reserved descriptors. */
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close(reserved[0]);
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close(reserved[1]);
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/* For a child to execute the command on the remote host using ssh. */
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do_cmd_pid = fork();
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if (do_cmd_pid == 0) {
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/* Child. */
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close(pin[1]);
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close(pout[0]);
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dup2(pin[0], 0);
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dup2(pout[1], 1);
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close(pin[0]);
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close(pout[1]);
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args.list[0] = ssh_program;
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if (remuser != NULL)
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addargs(&args, "-l%s", remuser);
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addargs(&args, "%s", host);
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addargs(&args, "%s", cmd);
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execvp(ssh_program, args.list);
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perror(ssh_program);
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exit(1);
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} else if (do_cmd_pid == -1) {
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fatal("fork: %s", strerror(errno));
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}
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/* Parent. Close the other side, and return the local side. */
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close(pin[0]);
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*fdout = pin[1];
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close(pout[1]);
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*fdin = pout[0];
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return 0;
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}
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typedef struct {
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int cnt;
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char *buf;
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} BUF;
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BUF *allocbuf(BUF *, int, int);
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void lostconn(int);
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void nospace(void);
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int okname(char *);
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void run_err(const char *,...);
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void verifydir(char *);
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struct passwd *pwd;
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uid_t userid;
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int errs, remin, remout;
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int pflag, iamremote, iamrecursive, targetshouldbedirectory;
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#define CMDNEEDS 64
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char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */
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int main(int, char *[]);
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int response(void);
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void rsource(char *, struct stat *);
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void sink(int, char *[]);
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void source(int, char *[]);
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void tolocal(int, char *[]);
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void toremote(char *, int, char *[]);
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void usage(void);
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int ch, fflag, tflag, status;
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double speed;
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char *targ, *endp;
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extern char *optarg;
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extern int optind;
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args.list = NULL;
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addargs(&args, "ssh"); /* overwritten with ssh_program */
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addargs(&args, "-x");
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addargs(&args, "-oForwardAgent no");
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addargs(&args, "-oClearAllForwardings yes");
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fflag = tflag = 0;
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while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
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switch (ch) {
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/* User-visible flags. */
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case '1':
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case '2':
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case '4':
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case '6':
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case 'C':
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addargs(&args, "-%c", ch);
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break;
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case 'o':
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case 'c':
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case 'i':
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case 'F':
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addargs(&args, "-%c%s", ch, optarg);
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break;
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case 'P':
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addargs(&args, "-p%s", optarg);
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break;
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case 'B':
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addargs(&args, "-oBatchmode yes");
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break;
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case 'l':
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speed = strtod(optarg, &endp);
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if (speed <= 0 || *endp != '\0')
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usage();
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limit = speed * 1024;
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break;
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case 'p':
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pflag = 1;
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break;
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case 'r':
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iamrecursive = 1;
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break;
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case 'S':
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ssh_program = xstrdup(optarg);
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break;
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case 'v':
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addargs(&args, "-v");
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verbose_mode = 1;
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break;
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case 'q':
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showprogress = 0;
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break;
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/* Server options. */
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case 'd':
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targetshouldbedirectory = 1;
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break;
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case 'f': /* "from" */
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iamremote = 1;
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fflag = 1;
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break;
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case 't': /* "to" */
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iamremote = 1;
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tflag = 1;
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break;
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if ((pwd = getpwuid(userid = getuid())) == NULL)
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fatal("unknown user %d", (int) userid);
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if (!isatty(STDERR_FILENO))
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showprogress = 0;
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remin = STDIN_FILENO;
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remout = STDOUT_FILENO;
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if (fflag) {
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/* Follow "protocol", send data. */
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(void) response();
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source(argc, argv);
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exit(errs != 0);
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}
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if (tflag) {
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/* Receive data. */
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sink(argc, argv);
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exit(errs != 0);
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}
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if (argc < 2)
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usage();
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if (argc > 2)
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targetshouldbedirectory = 1;
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remin = remout = -1;
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do_cmd_pid = -1;
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/* Command to be executed on remote system using "ssh". */
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(void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
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verbose_mode ? " -v" : "",
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iamrecursive ? " -r" : "", pflag ? " -p" : "",
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targetshouldbedirectory ? " -d" : "");
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(void) signal(SIGPIPE, lostconn);
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if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */
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toremote(targ, argc, argv);
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else {
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tolocal(argc, argv); /* Dest is local host. */
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if (targetshouldbedirectory)
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verifydir(argv[argc - 1]);
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}
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/*
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* Finally check the exit status of the ssh process, if one was forked
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* and no error has occured yet
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*/
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if (do_cmd_pid != -1 && errs == 0) {
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if (remin != -1)
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(void) close(remin);
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if (remout != -1)
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(void) close(remout);
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if (waitpid(do_cmd_pid, &status, 0) == -1)
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errs = 1;
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else {
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if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
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errs = 1;
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}
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}
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exit(errs != 0);
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}
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void
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toremote(targ, argc, argv)
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char *targ, *argv[];
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int argc;
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{
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int i, len;
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char *bp, *host, *src, *suser, *thost, *tuser;
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*targ++ = 0;
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if (*targ == 0)
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targ = ".";
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if ((thost = strrchr(argv[argc - 1], '@'))) {
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/* user@host */
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*thost++ = 0;
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tuser = argv[argc - 1];
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if (*tuser == '\0')
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tuser = NULL;
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} else {
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thost = argv[argc - 1];
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tuser = NULL;
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}
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for (i = 0; i < argc - 1; i++) {
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src = colon(argv[i]);
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if (src) { /* remote to remote */
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static char *ssh_options =
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"-x -o'ClearAllForwardings yes'";
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*src++ = 0;
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if (*src == 0)
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src = ".";
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host = strrchr(argv[i], '@');
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len = strlen(ssh_program) + strlen(argv[i]) +
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strlen(src) + (tuser ? strlen(tuser) : 0) +
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strlen(thost) + strlen(targ) +
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strlen(ssh_options) + CMDNEEDS + 20;
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bp = xmalloc(len);
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if (host) {
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*host++ = 0;
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host = cleanhostname(host);
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suser = argv[i];
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if (*suser == '\0')
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suser = pwd->pw_name;
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else if (!okname(suser)) {
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xfree(bp);
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continue;
|
|
}
|
|
if (tuser && !okname(tuser)) {
|
|
xfree(bp);
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|
continue;
|
|
}
|
|
snprintf(bp, len,
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"%s%s %s -n "
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"-l %s %s %s %s '%s%s%s:%s'",
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ssh_program, verbose_mode ? " -v" : "",
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|
ssh_options, suser, host, cmd, src,
|
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tuser ? tuser : "", tuser ? "@" : "",
|
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thost, targ);
|
|
} else {
|
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host = cleanhostname(argv[i]);
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|
snprintf(bp, len,
|
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"exec %s%s %s -n %s "
|
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"%s %s '%s%s%s:%s'",
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|
ssh_program, verbose_mode ? " -v" : "",
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|
ssh_options, host, cmd, src,
|
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tuser ? tuser : "", tuser ? "@" : "",
|
|
thost, targ);
|
|
}
|
|
if (verbose_mode)
|
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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) snprintf(bp, len, "%s -t %s", cmd, targ);
|
|
host = cleanhostname(thost);
|
|
if (do_cmd(host, tuser, bp, &remin,
|
|
&remout, argc) < 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) 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))
|
|
++errs;
|
|
(void) xfree(bp);
|
|
continue;
|
|
}
|
|
*src++ = 0;
|
|
if (*src == 0)
|
|
src = ".";
|
|
if ((host = strrchr(argv[i], '@')) == NULL) {
|
|
host = argv[i];
|
|
suser = NULL;
|
|
} else {
|
|
*host++ = 0;
|
|
suser = argv[i];
|
|
if (*suser == '\0')
|
|
suser = pwd->pw_name;
|
|
}
|
|
host = cleanhostname(host);
|
|
len = strlen(src) + CMDNEEDS + 20;
|
|
bp = xmalloc(len);
|
|
(void) snprintf(bp, len, "%s -f %s", cmd, src);
|
|
if (do_cmd(host, suser, bp, &remin, &remout, argc) < 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, amt, result, statbytes;
|
|
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) {
|
|
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) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
|
|
(u_long) stb.st_mtime,
|
|
(u_long) stb.st_atime);
|
|
(void) atomic_write(remout, buf, strlen(buf));
|
|
if (response() < 0)
|
|
goto next;
|
|
}
|
|
#define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
|
|
snprintf(buf, sizeof buf, "C%04o %lld %s\n",
|
|
(u_int) (stb.st_mode & FILEMODEMASK),
|
|
(long long)stb.st_size, last);
|
|
if (verbose_mode) {
|
|
fprintf(stderr, "Sending file modes: %s", buf);
|
|
}
|
|
(void) atomic_write(remout, buf, strlen(buf));
|
|
if (response() < 0)
|
|
goto next;
|
|
if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
|
|
next: (void) close(fd);
|
|
continue;
|
|
}
|
|
if (showprogress)
|
|
start_progress_meter(curfile, stb.st_size, &statbytes);
|
|
/* 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 = atomic_read(fd, bp->buf, amt);
|
|
if (result != amt)
|
|
haderr = result >= 0 ? EIO : errno;
|
|
}
|
|
if (haderr)
|
|
(void) atomic_write(remout, bp->buf, amt);
|
|
else {
|
|
result = atomic_write(remout, bp->buf, amt);
|
|
if (result != amt)
|
|
haderr = result >= 0 ? EIO : errno;
|
|
statbytes += result;
|
|
}
|
|
if (limit)
|
|
bwlimit(amt);
|
|
}
|
|
if (showprogress)
|
|
stop_progress_meter();
|
|
|
|
if (close(fd) < 0 && !haderr)
|
|
haderr = errno;
|
|
if (!haderr)
|
|
(void) atomic_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) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
|
|
(u_long) statp->st_mtime,
|
|
(u_long) statp->st_atime);
|
|
(void) atomic_write(remout, path, strlen(path));
|
|
if (response() < 0) {
|
|
closedir(dirp);
|
|
return;
|
|
}
|
|
}
|
|
(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) atomic_write(remout, path, strlen(path));
|
|
if (response() < 0) {
|
|
closedir(dirp);
|
|
return;
|
|
}
|
|
while ((dp = readdir(dirp)) != NULL) {
|
|
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) snprintf(path, sizeof path, "%s/%s", name, dp->d_name);
|
|
vect[0] = path;
|
|
source(1, vect);
|
|
}
|
|
(void) closedir(dirp);
|
|
(void) atomic_write(remout, "E\n", 2);
|
|
(void) response();
|
|
}
|
|
|
|
void
|
|
bwlimit(int amount)
|
|
{
|
|
static struct timeval bwstart, bwend;
|
|
static int lamt, thresh = 16384;
|
|
u_int64_t wait;
|
|
struct timespec ts, rm;
|
|
|
|
if (!timerisset(&bwstart)) {
|
|
gettimeofday(&bwstart, NULL);
|
|
return;
|
|
}
|
|
|
|
lamt += amount;
|
|
if (lamt < thresh)
|
|
return;
|
|
|
|
gettimeofday(&bwend, NULL);
|
|
timersub(&bwend, &bwstart, &bwend);
|
|
if (!timerisset(&bwend))
|
|
return;
|
|
|
|
lamt *= 8;
|
|
wait = (double)1000000L * lamt / limit;
|
|
|
|
bwstart.tv_sec = wait / 1000000L;
|
|
bwstart.tv_usec = wait % 1000000L;
|
|
|
|
if (timercmp(&bwstart, &bwend, >)) {
|
|
timersub(&bwstart, &bwend, &bwend);
|
|
|
|
/* Adjust the wait time */
|
|
if (bwend.tv_sec) {
|
|
thresh /= 2;
|
|
if (thresh < 2048)
|
|
thresh = 2048;
|
|
} else if (bwend.tv_usec < 100) {
|
|
thresh *= 2;
|
|
if (thresh > 32768)
|
|
thresh = 32768;
|
|
}
|
|
|
|
TIMEVAL_TO_TIMESPEC(&bwend, &ts);
|
|
while (nanosleep(&ts, &rm) == -1) {
|
|
if (errno != EINTR)
|
|
break;
|
|
ts = rm;
|
|
}
|
|
}
|
|
|
|
lamt = 0;
|
|
gettimeofday(&bwstart, NULL);
|
|
}
|
|
|
|
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;
|
|
off_t size, statbytes;
|
|
int setimes, targisdir, wrerrno = 0;
|
|
char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
|
|
struct timeval tv[2];
|
|
|
|
#define atime tv[0]
|
|
#define mtime tv[1]
|
|
#define SCREWUP(str) do { why = str; goto screwup; } while (0)
|
|
|
|
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) atomic_write(remout, "", 1);
|
|
if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
|
|
targisdir = 1;
|
|
for (first = 1;; first = 0) {
|
|
cp = buf;
|
|
if (atomic_read(remin, cp, 1) <= 0)
|
|
return;
|
|
if (*cp++ == '\n')
|
|
SCREWUP("unexpected <newline>");
|
|
do {
|
|
if (atomic_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) atomic_write(STDERR_FILENO,
|
|
buf + 1, strlen(buf + 1));
|
|
if (buf[0] == '\02')
|
|
exit(1);
|
|
++errs;
|
|
continue;
|
|
}
|
|
if (buf[0] == 'E') {
|
|
(void) atomic_write(remout, "", 1);
|
|
return;
|
|
}
|
|
if (ch == '\n')
|
|
*--cp = 0;
|
|
|
|
cp = buf;
|
|
if (*cp == 'T') {
|
|
setimes++;
|
|
cp++;
|
|
mtime.tv_sec = strtol(cp, &cp, 10);
|
|
if (!cp || *cp++ != ' ')
|
|
SCREWUP("mtime.sec not delimited");
|
|
mtime.tv_usec = strtol(cp, &cp, 10);
|
|
if (!cp || *cp++ != ' ')
|
|
SCREWUP("mtime.usec not delimited");
|
|
atime.tv_sec = strtol(cp, &cp, 10);
|
|
if (!cp || *cp++ != ' ')
|
|
SCREWUP("atime.sec not delimited");
|
|
atime.tv_usec = strtol(cp, &cp, 10);
|
|
if (!cp || *cp++ != '\0')
|
|
SCREWUP("atime.usec not delimited");
|
|
(void) atomic_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; 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)
|
|
xfree(namebuf);
|
|
namebuf = xmalloc(need);
|
|
cursize = need;
|
|
}
|
|
(void) snprintf(namebuf, need, "%s%s%s", targ,
|
|
strcmp(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] = xstrdup(np);
|
|
sink(1, vect);
|
|
if (setimes) {
|
|
setimes = 0;
|
|
if (utimes(vect[0], tv) < 0)
|
|
run_err("%s: set times: %s",
|
|
vect[0], strerror(errno));
|
|
}
|
|
if (mod_flag)
|
|
(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, mode)) < 0) {
|
|
bad: run_err("%s: %s", np, strerror(errno));
|
|
continue;
|
|
}
|
|
(void) atomic_write(remout, "", 1);
|
|
if ((bp = allocbuf(&buffer, ofd, 4096)) == NULL) {
|
|
(void) close(ofd);
|
|
continue;
|
|
}
|
|
cp = bp->buf;
|
|
wrerr = NO;
|
|
|
|
statbytes = 0;
|
|
if (showprogress)
|
|
start_progress_meter(curfile, size, &statbytes);
|
|
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 == -1 && (errno == EINTR ||
|
|
errno == EAGAIN)) {
|
|
continue;
|
|
} else if (j <= 0) {
|
|
run_err("%s", j ? strerror(errno) :
|
|
"dropped connection");
|
|
exit(1);
|
|
}
|
|
amt -= j;
|
|
cp += j;
|
|
statbytes += j;
|
|
} while (amt > 0);
|
|
|
|
if (limit)
|
|
bwlimit(4096);
|
|
|
|
if (count == bp->cnt) {
|
|
/* Keep reading so we stay sync'd up. */
|
|
if (wrerr == NO) {
|
|
j = atomic_write(ofd, bp->buf, count);
|
|
if (j != count) {
|
|
wrerr = YES;
|
|
wrerrno = j >= 0 ? EIO : errno;
|
|
}
|
|
}
|
|
count = 0;
|
|
cp = bp->buf;
|
|
}
|
|
}
|
|
if (showprogress)
|
|
stop_progress_meter();
|
|
if (count != 0 && wrerr == NO &&
|
|
(j = atomic_write(ofd, bp->buf, count)) != count) {
|
|
wrerr = YES;
|
|
wrerrno = j >= 0 ? EIO : errno;
|
|
}
|
|
if (wrerr == NO && ftruncate(ofd, size) != 0) {
|
|
run_err("%s: truncate: %s", np, strerror(errno));
|
|
wrerr = DISPLAYED;
|
|
}
|
|
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));
|
|
}
|
|
if (close(ofd) == -1) {
|
|
wrerr = YES;
|
|
wrerrno = errno;
|
|
}
|
|
(void) response();
|
|
if (setimes && wrerr == NO) {
|
|
setimes = 0;
|
|
if (utimes(np, tv) < 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) atomic_write(remout, "", 1);
|
|
break;
|
|
case DISPLAYED:
|
|
break;
|
|
}
|
|
}
|
|
screwup:
|
|
run_err("protocol error: %s", why);
|
|
exit(1);
|
|
}
|
|
|
|
int
|
|
response(void)
|
|
{
|
|
char ch, *cp, resp, rbuf[2048];
|
|
|
|
if (atomic_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 (atomic_read(remin, &ch, sizeof(ch)) != sizeof(ch))
|
|
lostconn(0);
|
|
*cp++ = ch;
|
|
} while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
|
|
|
|
if (!iamremote)
|
|
(void) atomic_write(STDERR_FILENO, rbuf, cp - rbuf);
|
|
++errs;
|
|
if (resp == 1)
|
|
return (-1);
|
|
exit(1);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
void
|
|
usage(void)
|
|
{
|
|
(void) fprintf(stderr,
|
|
"usage: scp [-pqrvBC1246] [-F config] [-S program] [-P port]\n"
|
|
" [-c cipher] [-i identity] [-l limit] [-o option]\n"
|
|
" [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
run_err(const char *fmt,...)
|
|
{
|
|
static FILE *fp;
|
|
va_list ap;
|
|
|
|
++errs;
|
|
if (fp == NULL && !(fp = fdopen(remout, "w")))
|
|
return;
|
|
(void) fprintf(fp, "%c", 0x01);
|
|
(void) fprintf(fp, "scp: ");
|
|
va_start(ap, fmt);
|
|
(void) vfprintf(fp, fmt, ap);
|
|
va_end(ap);
|
|
(void) fprintf(fp, "\n");
|
|
(void) fflush(fp);
|
|
|
|
if (!iamremote) {
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
}
|
|
|
|
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 = (int)*cp;
|
|
if (c & 0200)
|
|
goto bad;
|
|
if (!isalpha(c) && !isdigit(c)) {
|
|
switch (c) {
|
|
case '\'':
|
|
case '"':
|
|
case '`':
|
|
case ' ':
|
|
case '#':
|
|
goto bad;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
} while (*++cp);
|
|
return (1);
|
|
|
|
bad: fprintf(stderr, "%s: invalid user name\n", 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);
|
|
}
|
|
size = roundup(stb.st_blksize, blksize);
|
|
if (size == 0)
|
|
size = 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);
|
|
}
|
|
|
|
void
|
|
lostconn(signo)
|
|
int signo;
|
|
{
|
|
if (!iamremote)
|
|
write(STDERR_FILENO, "lost connection\n", 16);
|
|
if (signo)
|
|
_exit(1);
|
|
else
|
|
exit(1);
|
|
}
|