| /* $OpenBSD: scp.c,v 1.187 2016/09/12 01:22:38 deraadt 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> |
| #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 "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, char *cmd, int *fdin, int *fdout); |
| int do_cmd2(char *host, char *remuser, 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; |
| |
| /* 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, 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); |
| |
| /* |
| * 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 (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 functions executes a command simlar 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, 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); |
| |
| /* 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 (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(char *, int, char *[]); |
| void usage(void); |
| |
| int |
| main(int argc, char **argv) |
| { |
| int ch, fflag, tflag, status, n; |
| char *targ, **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"); |
| |
| fflag = tflag = 0; |
| while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q12346S:o:F:")) != -1) |
| switch (ch) { |
| /* User-visible flags. */ |
| case '1': |
| case '2': |
| 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': |
| addargs(&remote_remote_args, "-p"); |
| addargs(&remote_remote_args, "%s", optarg); |
| addargs(&args, "-p"); |
| addargs(&args, "%s", 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 ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ |
| toremote(targ, argc, argv); |
| else { |
| if (targetshouldbedirectory) |
| verifydir(argv[argc - 1]); |
| tolocal(argc, argv); /* Dest is local host. */ |
| } |
| /* |
| * 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()); |
| } |
| |
| void |
| toremote(char *targ, int argc, char **argv) |
| { |
| char *bp, *host, *src, *suser, *thost, *tuser, *arg; |
| arglist alist; |
| int i; |
| u_int j; |
| |
| memset(&alist, '\0', sizeof(alist)); |
| alist.list = NULL; |
| |
| *targ++ = 0; |
| if (*targ == 0) |
| targ = "."; |
| |
| arg = xstrdup(argv[argc - 1]); |
| if ((thost = strrchr(arg, '@'))) { |
| /* user@host */ |
| *thost++ = 0; |
| tuser = arg; |
| if (*tuser == '\0') |
| tuser = NULL; |
| } else { |
| thost = arg; |
| tuser = NULL; |
| } |
| |
| if (tuser != NULL && !okname(tuser)) { |
| free(arg); |
| return; |
| } |
| |
| for (i = 0; i < argc - 1; i++) { |
| src = colon(argv[i]); |
| if (src && throughlocal) { /* extended remote to remote */ |
| *src++ = 0; |
| if (*src == 0) |
| src = "."; |
| host = strrchr(argv[i], '@'); |
| if (host) { |
| *host++ = 0; |
| host = cleanhostname(host); |
| suser = argv[i]; |
| if (*suser == '\0') |
| suser = pwd->pw_name; |
| else if (!okname(suser)) |
| continue; |
| } else { |
| host = cleanhostname(argv[i]); |
| suser = NULL; |
| } |
| xasprintf(&bp, "%s -f %s%s", cmd, |
| *src == '-' ? "-- " : "", src); |
| if (do_cmd(host, suser, bp, &remin, &remout) < 0) |
| exit(1); |
| free(bp); |
| host = cleanhostname(thost); |
| xasprintf(&bp, "%s -t %s%s", cmd, |
| *targ == '-' ? "-- " : "", targ); |
| if (do_cmd2(host, tuser, bp, remin, remout) < 0) |
| exit(1); |
| free(bp); |
| (void) close(remin); |
| (void) close(remout); |
| remin = remout = -1; |
| } else if (src) { /* standard remote to remote */ |
| 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]); |
| } |
| *src++ = 0; |
| if (*src == 0) |
| src = "."; |
| host = strrchr(argv[i], '@'); |
| |
| if (host) { |
| *host++ = 0; |
| host = cleanhostname(host); |
| suser = argv[i]; |
| if (*suser == '\0') |
| suser = pwd->pw_name; |
| else if (!okname(suser)) |
| continue; |
| addargs(&alist, "-l"); |
| addargs(&alist, "%s", suser); |
| } else { |
| host = cleanhostname(argv[i]); |
| } |
| 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); |
| host = cleanhostname(thost); |
| if (do_cmd(host, tuser, bp, &remin, |
| &remout) < 0) |
| exit(1); |
| if (response() < 0) |
| exit(1); |
| free(bp); |
| } |
| source(1, argv + i); |
| } |
| } |
| free(arg); |
| } |
| |
| void |
| tolocal(int argc, char **argv) |
| { |
| char *bp, *host, *src, *suser; |
| arglist alist; |
| int i; |
| |
| memset(&alist, '\0', sizeof(alist)); |
| alist.list = NULL; |
| |
| for (i = 0; i < argc - 1; i++) { |
| if (!(src = colon(argv[i]))) { /* 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; |
| } |
| *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); |
| xasprintf(&bp, "%s -f %s%s", |
| cmd, *src == '-' ? "-- " : "", src); |
| if (do_cmd(host, suser, bp, &remin, &remout) < 0) { |
| free(bp); |
| ++errs; |
| continue; |
| } |
| free(bp); |
| sink(1, argv + argc - 1); |
| (void) close(remin); |
| remin = remout = -1; |
| } |
| } |
| |
| 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(); |
| } |
| |
| 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; } |
| |
| 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 ((time_t)ull < 0 || |
| (unsigned long long)(time_t)ull != 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 ((time_t)ull < 0 || |
| (unsigned long long)(time_t)ull != 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 (*cp++ != ' ') |
| SCREWUP("mode not delimited"); |
| |
| for (size = 0; isdigit((unsigned char)*cp);) |
| size = size * 10 + (*cp++ - '0'); |
| if (*cp++ != ' ') |
| SCREWUP("size not delimited"); |
| 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 [-12346BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n" |
| " [-l limit] [-o ssh_option] [-P port] [-S program]\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 || (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); |
| if (bp->buf == NULL) |
| bp->buf = xmalloc(size); |
| else |
| bp->buf = xreallocarray(bp->buf, 1, size); |
| memset(bp->buf, 0, size); |
| 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); |
| } |