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+/* $OpenBSD: scp.c,v 1.197 2018/06/01 04:31:48 dtucker Exp $ */
+/*
+ * 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>
+ *
+ * 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.
+ *
+ * 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. 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.
+ *
+ */
+
+#include "includes.h"
+
+#include <sys/types.h>
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+#ifdef HAVE_POLL_H
+#include <poll.h>
+#else
+# ifdef HAVE_SYS_POLL_H
+# include <sys/poll.h>
+# endif
+#endif
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#include <sys/wait.h>
+#include <sys/uio.h>
+
+#include <ctype.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <locale.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdarg.h>
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS)
+#include <vis.h>
+#endif
+
+#include "xmalloc.h"
+#include "ssh.h"
+#include "atomicio.h"
+#include "pathnames.h"
+#include "log.h"
+#include "misc.h"
+#include "progressmeter.h"
+#include "utf8.h"
+
+extern char *__progname;
+
+#define COPY_BUFLEN 16384
+
+int do_cmd(char *host, char *remuser, int port, char *cmd, int *fdin, int *fdout);
+int do_cmd2(char *host, char *remuser, int port, char *cmd, int fdin, int fdout);
+
+/* Struct for addargs */
+arglist args;
+arglist remote_remote_args;
+
+/* Bandwidth limit */
+long long limit_kbps = 0;
+struct bwlimit bwlimit;
+
+/* Name of current file being transferred. */
+char *curfile;
+
+/* This is set to non-zero to enable verbose mode. */
+int verbose_mode = 0;
+
+/* This is set to zero if the progressmeter is not desired. */
+int showprogress = 1;
+
+/*
+ * This is set to non-zero if remote-remote copy should be piped
+ * through this process.
+ */
+int throughlocal = 0;
+
+/* Non-standard port to use for the ssh connection or -1. */
+int sshport = -1;
+
+/* This is the program to execute for the secured connection. ("ssh" or -S) */
+char *ssh_program = _PATH_SSH_PROGRAM;
+
+/* This is used to store the pid of ssh_program */
+pid_t do_cmd_pid = -1;
+
+static void
+killchild(int signo)
+{
+ if (do_cmd_pid > 1) {
+ kill(do_cmd_pid, signo ? signo : SIGTERM);
+ waitpid(do_cmd_pid, NULL, 0);
+ }
+
+ if (signo)
+ _exit(1);
+ exit(1);
+}
+
+static void
+suspchild(int signo)
+{
+ int status;
+
+ if (do_cmd_pid > 1) {
+ kill(do_cmd_pid, signo);
+ while (waitpid(do_cmd_pid, &status, WUNTRACED) == -1 &&
+ errno == EINTR)
+ ;
+ kill(getpid(), SIGSTOP);
+ }
+}
+
+static int
+do_local_cmd(arglist *a)
+{
+ u_int i;
+ int status;
+ pid_t pid;
+
+ if (a->num == 0)
+ fatal("do_local_cmd: no arguments");
+
+ if (verbose_mode) {
+ fprintf(stderr, "Executing:");
+ for (i = 0; i < a->num; i++)
+ fmprintf(stderr, " %s", a->list[i]);
+ fprintf(stderr, "\n");
+ }
+ if ((pid = fork()) == -1)
+ fatal("do_local_cmd: fork: %s", strerror(errno));
+
+ if (pid == 0) {
+ execvp(a->list[0], a->list);
+ perror(a->list[0]);
+ exit(1);
+ }
+
+ do_cmd_pid = pid;
+ signal(SIGTERM, killchild);
+ signal(SIGINT, killchild);
+ signal(SIGHUP, killchild);
+
+ while (waitpid(pid, &status, 0) == -1)
+ if (errno != EINTR)
+ fatal("do_local_cmd: waitpid: %s", strerror(errno));
+
+ do_cmd_pid = -1;
+
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
+ return (-1);
+
+ return (0);
+}
+
+/*
+ * 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, int port, char *cmd, int *fdin, int *fdout)
+{
+ int pin[2], pout[2], reserved[2];
+
+ if (verbose_mode)
+ fmprintf(stderr,
+ "Executing: program %s host %s, user %s, command %s\n",
+ ssh_program, host,
+ remuser ? remuser : "(unspecified)", cmd);
+
+ if (port == -1)
+ port = sshport;
+
+ /*
+ * Reserve two descriptors so that the real pipes won't get
+ * descriptors 0 and 1 because that will screw up dup2 below.
+ */
+ if (pipe(reserved) < 0)
+ fatal("pipe: %s", strerror(errno));
+
+ /* 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]);
+
+ signal(SIGTSTP, suspchild);
+ signal(SIGTTIN, suspchild);
+ signal(SIGTTOU, suspchild);
+
+ /* Fork a child to execute the command on the remote host using ssh. */
+ do_cmd_pid = fork();
+ if (do_cmd_pid == 0) {
+ /* Child. */
+ close(pin[1]);
+ close(pout[0]);
+ dup2(pin[0], 0);
+ dup2(pout[1], 1);
+ close(pin[0]);
+ close(pout[1]);
+
+ replacearg(&args, 0, "%s", ssh_program);
+ if (port != -1) {
+ addargs(&args, "-p");
+ addargs(&args, "%d", port);
+ }
+ if (remuser != NULL) {
+ addargs(&args, "-l");
+ addargs(&args, "%s", remuser);
+ }
+ addargs(&args, "--");
+ addargs(&args, "%s", host);
+ addargs(&args, "%s", cmd);
+
+ execvp(ssh_program, args.list);
+ perror(ssh_program);
+ exit(1);
+ } else if (do_cmd_pid == -1) {
+ fatal("fork: %s", strerror(errno));
+ }
+ /* Parent. Close the other side, and return the local side. */
+ close(pin[0]);
+ *fdout = pin[1];
+ close(pout[1]);
+ *fdin = pout[0];
+ signal(SIGTERM, killchild);
+ signal(SIGINT, killchild);
+ signal(SIGHUP, killchild);
+ return 0;
+}
+
+/*
+ * This function executes a command similar to do_cmd(), but expects the
+ * input and output descriptors to be setup by a previous call to do_cmd().
+ * This way the input and output of two commands can be connected.
+ */
+int
+do_cmd2(char *host, char *remuser, int port, char *cmd, int fdin, int fdout)
+{
+ pid_t pid;
+ int status;
+
+ if (verbose_mode)
+ fmprintf(stderr,
+ "Executing: 2nd program %s host %s, user %s, command %s\n",
+ ssh_program, host,
+ remuser ? remuser : "(unspecified)", cmd);
+
+ if (port == -1)
+ port = sshport;
+
+ /* Fork a child to execute the command on the remote host using ssh. */
+ pid = fork();
+ if (pid == 0) {
+ dup2(fdin, 0);
+ dup2(fdout, 1);
+
+ replacearg(&args, 0, "%s", ssh_program);
+ if (port != -1) {
+ addargs(&args, "-p");
+ addargs(&args, "%d", port);
+ }
+ if (remuser != NULL) {
+ addargs(&args, "-l");
+ addargs(&args, "%s", remuser);
+ }
+ addargs(&args, "--");
+ addargs(&args, "%s", host);
+ addargs(&args, "%s", cmd);
+
+ execvp(ssh_program, args.list);
+ perror(ssh_program);
+ exit(1);
+ } else if (pid == -1) {
+ fatal("fork: %s", strerror(errno));
+ }
+ while (waitpid(pid, &status, 0) == -1)
+ if (errno != EINTR)
+ fatal("do_cmd2: waitpid: %s", strerror(errno));
+ return 0;
+}
+
+typedef struct {
+ size_t cnt;
+ char *buf;
+} BUF;
+
+BUF *allocbuf(BUF *, int, int);
+void lostconn(int);
+int okname(char *);
+void run_err(const char *,...);
+void verifydir(char *);
+
+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(int, char *[]);
+void usage(void);
+
+int
+main(int argc, char **argv)
+{
+ int ch, fflag, tflag, status, n;
+ char **newargv;
+ const char *errstr;
+ extern char *optarg;
+ extern int optind;
+
+ /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
+ sanitise_stdfd();
+
+ msetlocale();
+
+ /* Copy argv, because we modify it */
+ newargv = xcalloc(MAXIMUM(argc + 1, 1), sizeof(*newargv));
+ for (n = 0; n < argc; n++)
+ newargv[n] = xstrdup(argv[n]);
+ argv = newargv;
+
+ __progname = ssh_get_progname(argv[0]);
+
+ memset(&args, '\0', sizeof(args));
+ memset(&remote_remote_args, '\0', sizeof(remote_remote_args));
+ args.list = remote_remote_args.list = NULL;
+ addargs(&args, "%s", ssh_program);
+ addargs(&args, "-x");
+ addargs(&args, "-oForwardAgent=no");
+ addargs(&args, "-oPermitLocalCommand=no");
+ addargs(&args, "-oClearAllForwardings=yes");
+ addargs(&args, "-oRemoteCommand=none");
+ addargs(&args, "-oRequestTTY=no");
+
+ fflag = tflag = 0;
+ while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q12346S:o:F:")) != -1)
+ switch (ch) {
+ /* User-visible flags. */
+ case '1':
+ fatal("SSH protocol v.1 is no longer supported");
+ break;
+ case '2':
+ /* Ignored */
+ break;
+ case '4':
+ case '6':
+ case 'C':
+ addargs(&args, "-%c", ch);
+ addargs(&remote_remote_args, "-%c", ch);
+ break;
+ case '3':
+ throughlocal = 1;
+ break;
+ case 'o':
+ case 'c':
+ case 'i':
+ case 'F':
+ addargs(&remote_remote_args, "-%c", ch);
+ addargs(&remote_remote_args, "%s", optarg);
+ addargs(&args, "-%c", ch);
+ addargs(&args, "%s", optarg);
+ break;
+ case 'P':
+ sshport = a2port(optarg);
+ if (sshport <= 0)
+ fatal("bad port \"%s\"\n", optarg);
+ break;
+ case 'B':
+ addargs(&remote_remote_args, "-oBatchmode=yes");
+ addargs(&args, "-oBatchmode=yes");
+ break;
+ case 'l':
+ limit_kbps = strtonum(optarg, 1, 100 * 1024 * 1024,
+ &errstr);
+ if (errstr != NULL)
+ usage();
+ limit_kbps *= 1024; /* kbps */
+ bandwidth_limit_init(&bwlimit, limit_kbps, COPY_BUFLEN);
+ break;
+ case 'p':
+ pflag = 1;
+ break;
+ case 'r':
+ iamrecursive = 1;
+ break;
+ case 'S':
+ ssh_program = xstrdup(optarg);
+ break;
+ case 'v':
+ addargs(&args, "-v");
+ addargs(&remote_remote_args, "-v");
+ verbose_mode = 1;
+ break;
+ case 'q':
+ addargs(&args, "-q");
+ addargs(&remote_remote_args, "-q");
+ showprogress = 0;
+ break;
+
+ /* Server options. */
+ case 'd':
+ targetshouldbedirectory = 1;
+ break;
+ case 'f': /* "from" */
+ iamremote = 1;
+ fflag = 1;
+ break;
+ case 't': /* "to" */
+ iamremote = 1;
+ tflag = 1;
+#ifdef HAVE_CYGWIN
+ setmode(0, O_BINARY);
+#endif
+ break;
+ default:
+ usage();
+ }
+ argc -= optind;
+ argv += optind;
+
+ if ((pwd = getpwuid(userid = getuid())) == NULL)
+ fatal("unknown user %u", (u_int) userid);
+
+ if (!isatty(STDOUT_FILENO))
+ showprogress = 0;
+
+ if (pflag) {
+ /* Cannot pledge: -p allows setuid/setgid files... */
+ } else {
+ if (pledge("stdio rpath wpath cpath fattr tty proc exec",
+ NULL) == -1) {
+ perror("pledge");
+ exit(1);
+ }
+ }
+
+ 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;
+ do_cmd_pid = -1;
+ /* Command to be executed on remote system using "ssh". */
+ (void) snprintf(cmd, sizeof cmd, "scp%s%s%s%s",
+ verbose_mode ? " -v" : "",
+ iamrecursive ? " -r" : "", pflag ? " -p" : "",
+ targetshouldbedirectory ? " -d" : "");
+
+ (void) signal(SIGPIPE, lostconn);
+
+ if (colon(argv[argc - 1])) /* Dest is remote host. */
+ toremote(argc, argv);
+ else {
+ if (targetshouldbedirectory)
+ verifydir(argv[argc - 1]);
+ tolocal(argc, argv); /* Dest is local host. */
+ }
+ /*
+ * Finally check the exit status of the ssh process, if one was forked
+ * and no error has occurred yet
+ */
+ if (do_cmd_pid != -1 && errs == 0) {
+ if (remin != -1)
+ (void) close(remin);
+ if (remout != -1)
+ (void) close(remout);
+ if (waitpid(do_cmd_pid, &status, 0) == -1)
+ errs = 1;
+ else {
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
+ errs = 1;
+ }
+ }
+ exit(errs != 0);
+}
+
+/* Callback from atomicio6 to update progress meter and limit bandwidth */
+static int
+scpio(void *_cnt, size_t s)
+{
+ off_t *cnt = (off_t *)_cnt;
+
+ *cnt += s;
+ if (limit_kbps > 0)
+ bandwidth_limit(&bwlimit, s);
+ return 0;
+}
+
+static int
+do_times(int fd, int verb, const struct stat *sb)
+{
+ /* strlen(2^64) == 20; strlen(10^6) == 7 */
+ char buf[(20 + 7 + 2) * 2 + 2];
+
+ (void)snprintf(buf, sizeof(buf), "T%llu 0 %llu 0\n",
+ (unsigned long long) (sb->st_mtime < 0 ? 0 : sb->st_mtime),
+ (unsigned long long) (sb->st_atime < 0 ? 0 : sb->st_atime));
+ if (verb) {
+ fprintf(stderr, "File mtime %lld atime %lld\n",
+ (long long)sb->st_mtime, (long long)sb->st_atime);
+ fprintf(stderr, "Sending file timestamps: %s", buf);
+ }
+ (void) atomicio(vwrite, fd, buf, strlen(buf));
+ return (response());
+}
+
+static int
+parse_scp_uri(const char *uri, char **userp, char **hostp, int *portp,
+ char **pathp)
+{
+ int r;
+
+ r = parse_uri("scp", uri, userp, hostp, portp, pathp);
+ if (r == 0 && *pathp == NULL)
+ *pathp = xstrdup(".");
+ return r;
+}
+
+void
+toremote(int argc, char **argv)
+{
+ char *suser = NULL, *host = NULL, *src = NULL;
+ char *bp, *tuser, *thost, *targ;
+ int sport = -1, tport = -1;
+ arglist alist;
+ int i, r;
+ u_int j;
+
+ memset(&alist, '\0', sizeof(alist));
+ alist.list = NULL;
+
+ /* Parse target */
+ r = parse_scp_uri(argv[argc - 1], &tuser, &thost, &tport, &targ);
+ if (r == -1) {
+ fmprintf(stderr, "%s: invalid uri\n", argv[argc - 1]);
+ ++errs;
+ goto out;
+ }
+ if (r != 0) {
+ if (parse_user_host_path(argv[argc - 1], &tuser, &thost,
+ &targ) == -1) {
+ fmprintf(stderr, "%s: invalid target\n", argv[argc - 1]);
+ ++errs;
+ goto out;
+ }
+ }
+ if (tuser != NULL && !okname(tuser)) {
+ ++errs;
+ goto out;
+ }
+
+ /* Parse source files */
+ for (i = 0; i < argc - 1; i++) {
+ free(suser);
+ free(host);
+ free(src);
+ r = parse_scp_uri(argv[i], &suser, &host, &sport, &src);
+ if (r == -1) {
+ fmprintf(stderr, "%s: invalid uri\n", argv[i]);
+ ++errs;
+ continue;
+ }
+ if (r != 0) {
+ parse_user_host_path(argv[i], &suser, &host, &src);
+ }
+ if (suser != NULL && !okname(suser)) {
+ ++errs;
+ continue;
+ }
+ if (host && throughlocal) { /* extended remote to remote */
+ xasprintf(&bp, "%s -f %s%s", cmd,
+ *src == '-' ? "-- " : "", src);
+ if (do_cmd(host, suser, sport, bp, &remin, &remout) < 0)
+ exit(1);
+ free(bp);
+ xasprintf(&bp, "%s -t %s%s", cmd,
+ *targ == '-' ? "-- " : "", targ);
+ if (do_cmd2(thost, tuser, tport, bp, remin, remout) < 0)
+ exit(1);
+ free(bp);
+ (void) close(remin);
+ (void) close(remout);
+ remin = remout = -1;
+ } else if (host) { /* standard remote to remote */
+ if (tport != -1 && tport != SSH_DEFAULT_PORT) {
+ /* This would require the remote support URIs */
+ fatal("target port not supported with two "
+ "remote hosts without the -3 option");
+ }
+
+ freeargs(&alist);
+ addargs(&alist, "%s", ssh_program);
+ addargs(&alist, "-x");
+ addargs(&alist, "-oClearAllForwardings=yes");
+ addargs(&alist, "-n");
+ for (j = 0; j < remote_remote_args.num; j++) {
+ addargs(&alist, "%s",
+ remote_remote_args.list[j]);
+ }
+
+ if (sport != -1) {
+ addargs(&alist, "-p");
+ addargs(&alist, "%d", sport);
+ }
+ if (suser) {
+ addargs(&alist, "-l");
+ addargs(&alist, "%s", suser);
+ }
+ addargs(&alist, "--");
+ addargs(&alist, "%s", host);
+ addargs(&alist, "%s", cmd);
+ addargs(&alist, "%s", src);
+ addargs(&alist, "%s%s%s:%s",
+ tuser ? tuser : "", tuser ? "@" : "",
+ thost, targ);
+ if (do_local_cmd(&alist) != 0)
+ errs = 1;
+ } else { /* local to remote */
+ if (remin == -1) {
+ xasprintf(&bp, "%s -t %s%s", cmd,
+ *targ == '-' ? "-- " : "", targ);
+ if (do_cmd(thost, tuser, tport, bp, &remin,
+ &remout) < 0)
+ exit(1);
+ if (response() < 0)
+ exit(1);
+ free(bp);
+ }
+ source(1, argv + i);
+ }
+ }
+out:
+ free(tuser);
+ free(thost);
+ free(targ);
+ free(suser);
+ free(host);
+ free(src);
+}
+
+void
+tolocal(int argc, char **argv)
+{
+ char *bp, *host = NULL, *src = NULL, *suser = NULL;
+ arglist alist;
+ int i, r, sport = -1;
+
+ memset(&alist, '\0', sizeof(alist));
+ alist.list = NULL;
+
+ for (i = 0; i < argc - 1; i++) {
+ free(suser);
+ free(host);
+ free(src);
+ r = parse_scp_uri(argv[i], &suser, &host, &sport, &src);
+ if (r == -1) {
+ fmprintf(stderr, "%s: invalid uri\n", argv[i]);
+ ++errs;
+ continue;
+ }
+ if (r != 0)
+ parse_user_host_path(argv[i], &suser, &host, &src);
+ if (suser != NULL && !okname(suser)) {
+ ++errs;
+ continue;
+ }
+ if (!host) { /* Local to local. */
+ freeargs(&alist);
+ addargs(&alist, "%s", _PATH_CP);
+ if (iamrecursive)
+ addargs(&alist, "-r");
+ if (pflag)
+ addargs(&alist, "-p");
+ addargs(&alist, "--");
+ addargs(&alist, "%s", argv[i]);
+ addargs(&alist, "%s", argv[argc-1]);
+ if (do_local_cmd(&alist))
+ ++errs;
+ continue;
+ }
+ /* Remote to local. */
+ xasprintf(&bp, "%s -f %s%s",
+ cmd, *src == '-' ? "-- " : "", src);
+ if (do_cmd(host, suser, sport, bp, &remin, &remout) < 0) {
+ free(bp);
+ ++errs;
+ continue;
+ }
+ free(bp);
+ sink(1, argv + argc - 1);
+ (void) close(remin);
+ remin = remout = -1;
+ }
+ free(suser);
+ free(host);
+ free(src);
+}
+
+void
+source(int argc, char **argv)
+{
+ struct stat stb;
+ static BUF buffer;
+ BUF *bp;
+ off_t i, statbytes;
+ size_t amt, nr;
+ int fd = -1, haderr, indx;
+ char *last, *name, buf[2048], encname[PATH_MAX];
+ 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 ((fd = open(name, O_RDONLY|O_NONBLOCK, 0)) < 0)
+ goto syserr;
+ if (strchr(name, '\n') != NULL) {
+ strnvis(encname, name, sizeof(encname), VIS_NL);
+ name = encname;
+ }
+ if (fstat(fd, &stb) < 0) {
+syserr: run_err("%s: %s", name, strerror(errno));
+ goto next;
+ }
+ if (stb.st_size < 0) {
+ run_err("%s: %s", name, "Negative file size");
+ goto next;
+ }
+ unset_nonblock(fd);
+ 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) {
+ if (do_times(remout, verbose_mode, &stb) < 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)
+ fmprintf(stderr, "Sending file modes: %s", buf);
+ (void) atomicio(vwrite, remout, buf, strlen(buf));
+ if (response() < 0)
+ goto next;
+ if ((bp = allocbuf(&buffer, fd, COPY_BUFLEN)) == NULL) {
+next: if (fd != -1) {
+ (void) close(fd);
+ fd = -1;
+ }
+ continue;
+ }
+ if (showprogress)
+ start_progress_meter(curfile, stb.st_size, &statbytes);
+ set_nonblock(remout);
+ for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
+ amt = bp->cnt;
+ if (i + (off_t)amt > stb.st_size)
+ amt = stb.st_size - i;
+ if (!haderr) {
+ if ((nr = atomicio(read, fd,
+ bp->buf, amt)) != amt) {
+ haderr = errno;
+ memset(bp->buf + nr, 0, amt - nr);
+ }
+ }
+ /* Keep writing after error to retain sync */
+ if (haderr) {
+ (void)atomicio(vwrite, remout, bp->buf, amt);
+ memset(bp->buf, 0, amt);
+ continue;
+ }
+ if (atomicio6(vwrite, remout, bp->buf, amt, scpio,
+ &statbytes) != amt)
+ haderr = errno;
+ }
+ unset_nonblock(remout);
+
+ if (fd != -1) {
+ if (close(fd) < 0 && !haderr)
+ haderr = errno;
+ fd = -1;
+ }
+ if (!haderr)
+ (void) atomicio(vwrite, remout, "", 1);
+ else
+ run_err("%s: %s", name, strerror(haderr));
+ (void) response();
+ if (showprogress)
+ stop_progress_meter();
+ }
+}
+
+void
+rsource(char *name, struct stat *statp)
+{
+ DIR *dirp;
+ struct dirent *dp;
+ char *last, *vect[1], path[PATH_MAX];
+
+ if (!(dirp = opendir(name))) {
+ run_err("%s: %s", name, strerror(errno));
+ return;
+ }
+ last = strrchr(name, '/');
+ if (last == NULL)
+ last = name;
+ else
+ last++;
+ if (pflag) {
+ if (do_times(remout, verbose_mode, statp) < 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)
+ fmprintf(stderr, "Entering directory: %s", path);
+ (void) atomicio(vwrite, 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) atomicio(vwrite, remout, "E\n", 2);
+ (void) response();
+}
+
+#define TYPE_OVERFLOW(type, val) \
+ ((sizeof(type) == 4 && (val) > INT32_MAX) || \
+ (sizeof(type) == 8 && (val) > INT64_MAX) || \
+ (sizeof(type) != 4 && sizeof(type) != 8))
+
+void
+sink(int argc, char **argv)
+{
+ static BUF buffer;
+ struct stat stb;
+ enum {
+ YES, NO, DISPLAYED
+ } wrerr;
+ BUF *bp;
+ off_t i;
+ size_t j, count;
+ int amt, exists, first, ofd;
+ mode_t mode, omode, mask;
+ off_t size, statbytes;
+ unsigned long long ull;
+ int setimes, targisdir, wrerrno = 0;
+ char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048];
+ struct timeval tv[2];
+
+#define atime tv[0]
+#define mtime tv[1]
+#define SCREWUP(str) { why = str; goto screwup; }
+
+ if (TYPE_OVERFLOW(time_t, 0) || TYPE_OVERFLOW(off_t, 0))
+ SCREWUP("Unexpected off_t/time_t size");
+
+ 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) atomicio(vwrite, remout, "", 1);
+ if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
+ targisdir = 1;
+ for (first = 1;; first = 0) {
+ cp = buf;
+ if (atomicio(read, remin, cp, 1) != 1)
+ return;
+ if (*cp++ == '\n')
+ SCREWUP("unexpected <newline>");
+ do {
+ if (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
+ SCREWUP("lost connection");
+ *cp++ = ch;
+ } while (cp < &buf[sizeof(buf) - 1] && ch != '\n');
+ *cp = 0;
+ if (verbose_mode)
+ fmprintf(stderr, "Sink: %s", buf);
+
+ if (buf[0] == '\01' || buf[0] == '\02') {
+ if (iamremote == 0) {
+ (void) snmprintf(visbuf, sizeof(visbuf),
+ NULL, "%s", buf + 1);
+ (void) atomicio(vwrite, STDERR_FILENO,
+ visbuf, strlen(visbuf));
+ }
+ if (buf[0] == '\02')
+ exit(1);
+ ++errs;
+ continue;
+ }
+ if (buf[0] == 'E') {
+ (void) atomicio(vwrite, remout, "", 1);
+ return;
+ }
+ if (ch == '\n')
+ *--cp = 0;
+
+ cp = buf;
+ if (*cp == 'T') {
+ setimes++;
+ cp++;
+ if (!isdigit((unsigned char)*cp))
+ SCREWUP("mtime.sec not present");
+ ull = strtoull(cp, &cp, 10);
+ if (!cp || *cp++ != ' ')
+ SCREWUP("mtime.sec not delimited");
+ if (TYPE_OVERFLOW(time_t, ull))
+ setimes = 0; /* out of range */
+ mtime.tv_sec = ull;
+ mtime.tv_usec = strtol(cp, &cp, 10);
+ if (!cp || *cp++ != ' ' || mtime.tv_usec < 0 ||
+ mtime.tv_usec > 999999)
+ SCREWUP("mtime.usec not delimited");
+ if (!isdigit((unsigned char)*cp))
+ SCREWUP("atime.sec not present");
+ ull = strtoull(cp, &cp, 10);
+ if (!cp || *cp++ != ' ')
+ SCREWUP("atime.sec not delimited");
+ if (TYPE_OVERFLOW(time_t, ull))
+ setimes = 0; /* out of range */
+ atime.tv_sec = ull;
+ atime.tv_usec = strtol(cp, &cp, 10);
+ if (!cp || *cp++ != '\0' || atime.tv_usec < 0 ||
+ atime.tv_usec > 999999)
+ SCREWUP("atime.usec not delimited");
+ (void) atomicio(vwrite, 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 (!pflag)
+ mode &= ~mask;
+ if (*cp++ != ' ')
+ SCREWUP("mode not delimited");
+
+ if (!isdigit((unsigned char)*cp))
+ SCREWUP("size not present");
+ ull = strtoull(cp, &cp, 10);
+ if (!cp || *cp++ != ' ')
+ SCREWUP("size not delimited");
+ if (TYPE_OVERFLOW(off_t, ull))
+ SCREWUP("size out of range");
+ size = (off_t)ull;
+
+ if ((strchr(cp, '/') != NULL) || (strcmp(cp, "..") == 0)) {
+ run_err("error: unexpected filename: %s", cp);
+ exit(1);
+ }
+ if (targisdir) {
+ static char *namebuf;
+ static size_t cursize;
+ size_t need;
+
+ need = strlen(targ) + strlen(cp) + 250;
+ if (need > cursize) {
+ free(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 (!iamrecursive)
+ SCREWUP("received directory without -r");
+ 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);
+ free(vect[0]);
+ continue;
+ }
+ omode = mode;
+ mode |= S_IWUSR;
+ if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
+bad: run_err("%s: %s", np, strerror(errno));
+ continue;
+ }
+ (void) atomicio(vwrite, remout, "", 1);
+ if ((bp = allocbuf(&buffer, ofd, COPY_BUFLEN)) == NULL) {
+ (void) close(ofd);
+ continue;
+ }
+ cp = bp->buf;
+ wrerr = NO;
+
+ statbytes = 0;
+ if (showprogress)
+ start_progress_meter(curfile, size, &statbytes);
+ set_nonblock(remin);
+ for (count = i = 0; i < size; i += bp->cnt) {
+ amt = bp->cnt;
+ if (i + amt > size)
+ amt = size - i;
+ count += amt;
+ do {
+ j = atomicio6(read, remin, cp, amt,
+ scpio, &statbytes);
+ if (j == 0) {
+ run_err("%s", j != EPIPE ?
+ strerror(errno) :
+ "dropped connection");
+ exit(1);
+ }
+ amt -= j;
+ cp += j;
+ } while (amt > 0);
+
+ if (count == bp->cnt) {
+ /* Keep reading so we stay sync'd up. */
+ if (wrerr == NO) {
+ if (atomicio(vwrite, ofd, bp->buf,
+ count) != count) {
+ wrerr = YES;
+ wrerrno = errno;
+ }
+ }
+ count = 0;
+ cp = bp->buf;
+ }
+ }
+ unset_nonblock(remin);
+ if (count != 0 && wrerr == NO &&
+ atomicio(vwrite, ofd, bp->buf, count) != count) {
+ wrerr = YES;
+ wrerrno = errno;
+ }
+ if (wrerr == NO && (!exists || S_ISREG(stb.st_mode)) &&
+ ftruncate(ofd, size) != 0) {
+ run_err("%s: truncate: %s", np, strerror(errno));
+ wrerr = DISPLAYED;
+ }
+ 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));
+ wrerr = DISPLAYED;
+ }
+ } 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));
+ wrerr = DISPLAYED;
+ }
+ }
+ if (close(ofd) == -1) {
+ wrerr = YES;
+ wrerrno = errno;
+ }
+ (void) response();
+ if (showprogress)
+ stop_progress_meter();
+ 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) atomicio(vwrite, remout, "", 1);
+ break;
+ case DISPLAYED:
+ break;
+ }
+ }
+screwup:
+ run_err("protocol error: %s", why);
+ exit(1);
+}
+
+int
+response(void)
+{
+ char ch, *cp, resp, rbuf[2048], visbuf[2048];
+
+ if (atomicio(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 (atomicio(read, remin, &ch, sizeof(ch)) != sizeof(ch))
+ lostconn(0);
+ *cp++ = ch;
+ } while (cp < &rbuf[sizeof(rbuf) - 1] && ch != '\n');
+
+ if (!iamremote) {
+ cp[-1] = '\0';
+ (void) snmprintf(visbuf, sizeof(visbuf),
+ NULL, "%s\n", rbuf);
+ (void) atomicio(vwrite, STDERR_FILENO,
+ visbuf, strlen(visbuf));
+ }
+ ++errs;
+ if (resp == 1)
+ return (-1);
+ exit(1);
+ }
+ /* NOTREACHED */
+}
+
+void
+usage(void)
+{
+ (void) fprintf(stderr,
+ "usage: scp [-346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
+ " [-l limit] [-o ssh_option] [-P port] [-S program] source ... target\n");
+ exit(1);
+}
+
+void
+run_err(const char *fmt,...)
+{
+ static FILE *fp;
+ va_list ap;
+
+ ++errs;
+ if (fp != NULL || (remout != -1 && (fp = fdopen(remout, "w")))) {
+ (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);
+ vfmprintf(stderr, fmt, ap);
+ va_end(ap);
+ fprintf(stderr, "\n");
+ }
+}
+
+void
+verifydir(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));
+ killchild(0);
+}
+
+int
+okname(char *cp0)
+{
+ int c;
+ char *cp;
+
+ cp = cp0;
+ do {
+ c = (int)*cp;
+ if (c & 0200)
+ goto bad;
+ if (!isalpha(c) && !isdigit((unsigned char)c)) {
+ switch (c) {
+ case '\'':
+ case '"':
+ case '`':
+ case ' ':
+ case '#':
+ goto bad;
+ default:
+ break;
+ }
+ }
+ } while (*++cp);
+ return (1);
+
+bad: fmprintf(stderr, "%s: invalid user name\n", cp0);
+ return (0);
+}
+
+BUF *
+allocbuf(BUF *bp, int fd, int blksize)
+{
+ size_t size;
+#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
+ 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;
+#else /* HAVE_STRUCT_STAT_ST_BLKSIZE */
+ size = blksize;
+#endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */
+ if (bp->cnt >= size)
+ return (bp);
+ bp->buf = xrecallocarray(bp->buf, bp->cnt, size, 1);
+ bp->cnt = size;
+ return (bp);
+}
+
+void
+lostconn(int signo)
+{
+ if (!iamremote)
+ (void)write(STDERR_FILENO, "lost connection\n", 16);
+ if (signo)
+ _exit(1);
+ else
+ exit(1);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 13:53:37 +0000