From 0b6b94e6b6152f15cf4c2247c5974f539aae28cd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 10 Apr 2024 21:49:46 +0200 Subject: Adding upstream version 1:9.6p1. Signed-off-by: Daniel Baumann --- scp.c | 2275 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 2275 insertions(+) create mode 100644 scp.c (limited to 'scp.c') diff --git a/scp.c b/scp.c new file mode 100644 index 0000000..492dace --- /dev/null +++ b/scp.c @@ -0,0 +1,2275 @@ +/* $OpenBSD: scp.c,v 1.260 2023/10/11 05:42:08 djm 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 , Tatu Ylonen + * + * 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 +#ifdef HAVE_SYS_STAT_H +# include +#endif +#ifdef HAVE_POLL_H +#include +#else +# ifdef HAVE_SYS_POLL_H +# include +# endif +#endif +#ifdef HAVE_SYS_TIME_H +# include +#endif +#include +#include + +#include +#include +#include +#include +#ifdef HAVE_FNMATCH_H +#include +#endif +#ifdef USE_SYSTEM_GLOB +# include +#else +# include "openbsd-compat/glob.h" +#endif +#ifdef HAVE_LIBGEN_H +#include +#endif +#include +#ifdef HAVE_UTIL_H +# include +#endif +#include +#include +#include +#include +#ifdef HAVE_STDINT_H +# include +#endif +#include +#include +#include +#include +#include +#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS) +#include +#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" +#include "sftp.h" + +#include "sftp-common.h" +#include "sftp-client.h" + +extern char *__progname; + +#define COPY_BUFLEN 16384 + +int do_cmd(char *, char *, char *, int, int, char *, int *, int *, pid_t *); +int do_cmd2(char *, char *, int, char *, int, int); + +/* 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; +LogLevel log_level = SYSLOG_LEVEL_INFO; + +/* 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 = 1; + +/* 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; +pid_t do_cmd_pid2 = -1; + +/* SFTP copy parameters */ +size_t sftp_copy_buflen; +size_t sftp_nrequests; + +/* Needed for sftp */ +volatile sig_atomic_t interrupted = 0; + +int sftp_glob(struct sftp_conn *, const char *, int, + int (*)(const char *, int), glob_t *); /* proto for sftp-glob.c */ + +static void +killchild(int signo) +{ + if (do_cmd_pid > 1) { + kill(do_cmd_pid, signo ? signo : SIGTERM); + (void)waitpid(do_cmd_pid, NULL, 0); + } + if (do_cmd_pid2 > 1) { + kill(do_cmd_pid2, signo ? signo : SIGTERM); + (void)waitpid(do_cmd_pid2, NULL, 0); + } + + if (signo) + _exit(1); + exit(1); +} + +static void +suspone(int pid, int signo) +{ + int status; + + if (pid > 1) { + kill(pid, signo); + while (waitpid(pid, &status, WUNTRACED) == -1 && + errno == EINTR) + ; + } +} + +static void +suspchild(int signo) +{ + suspone(do_cmd_pid, signo); + suspone(do_cmd_pid2, signo); + 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; + ssh_signal(SIGTERM, killchild); + ssh_signal(SIGINT, killchild); + ssh_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 *program, char *host, char *remuser, int port, int subsystem, + char *cmd, int *fdin, int *fdout, pid_t *pid) +{ +#ifdef USE_PIPES + int pin[2], pout[2]; +#else + int sv[2]; +#endif + + if (verbose_mode) + fmprintf(stderr, + "Executing: program %s host %s, user %s, command %s\n", + program, host, + remuser ? remuser : "(unspecified)", cmd); + + if (port == -1) + port = sshport; + +#ifdef USE_PIPES + if (pipe(pin) == -1 || pipe(pout) == -1) + fatal("pipe: %s", strerror(errno)); +#else + /* Create a socket pair for communicating with ssh. */ + if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == -1) + fatal("socketpair: %s", strerror(errno)); +#endif + + ssh_signal(SIGTSTP, suspchild); + ssh_signal(SIGTTIN, suspchild); + ssh_signal(SIGTTOU, suspchild); + + /* Fork a child to execute the command on the remote host using ssh. */ + *pid = fork(); + switch (*pid) { + case -1: + fatal("fork: %s", strerror(errno)); + case 0: + /* Child. */ +#ifdef USE_PIPES + if (dup2(pin[0], STDIN_FILENO) == -1 || + dup2(pout[1], STDOUT_FILENO) == -1) { + error("dup2: %s", strerror(errno)); + _exit(1); + } + close(pin[0]); + close(pin[1]); + close(pout[0]); + close(pout[1]); +#else + if (dup2(sv[0], STDIN_FILENO) == -1 || + dup2(sv[0], STDOUT_FILENO) == -1) { + error("dup2: %s", strerror(errno)); + _exit(1); + } + close(sv[0]); + close(sv[1]); +#endif + replacearg(&args, 0, "%s", program); + if (port != -1) { + addargs(&args, "-p"); + addargs(&args, "%d", port); + } + if (remuser != NULL) { + addargs(&args, "-l"); + addargs(&args, "%s", remuser); + } + if (subsystem) + addargs(&args, "-s"); + addargs(&args, "--"); + addargs(&args, "%s", host); + addargs(&args, "%s", cmd); + + execvp(program, args.list); + perror(program); + _exit(1); + default: + /* Parent. Close the other side, and return the local side. */ +#ifdef USE_PIPES + close(pin[0]); + close(pout[1]); + *fdout = pin[1]; + *fdin = pout[0]; +#else + close(sv[0]); + *fdin = sv[1]; + *fdout = sv[1]; +#endif + ssh_signal(SIGTERM, killchild); + ssh_signal(SIGINT, killchild); + ssh_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) +{ + int status; + pid_t pid; + + 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) { + if (dup2(fdin, 0) == -1) + perror("dup2"); + if (dup2(fdout, 1) == -1) + perror("dup2"); + + 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, "-oBatchMode=yes"); + 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 *,...) + __attribute__((__format__ (printf, 1, 2))) + __attribute__((__nonnull__ (1))); +int note_err(const char *,...) + __attribute__((__format__ (printf, 1, 2))); +void verifydir(char *); + +struct passwd *pwd; +uid_t userid; +int errs, remin, remout, remin2, remout2; +int Tflag, pflag, iamremote, iamrecursive, targetshouldbedirectory; + +#define CMDNEEDS 64 +char cmd[CMDNEEDS]; /* must hold "rcp -r -p -d\0" */ + +enum scp_mode_e { + MODE_SCP, + MODE_SFTP +}; + +int response(void); +void rsource(char *, struct stat *); +void sink(int, char *[], const char *); +void source(int, char *[]); +void tolocal(int, char *[], enum scp_mode_e, char *sftp_direct); +void toremote(int, char *[], enum scp_mode_e, char *sftp_direct); +void usage(void); + +void source_sftp(int, char *, char *, struct sftp_conn *); +void sink_sftp(int, char *, const char *, struct sftp_conn *); +void throughlocal_sftp(struct sftp_conn *, struct sftp_conn *, + char *, char *); + +int +main(int argc, char **argv) +{ + int ch, fflag, tflag, status, r, n; + char **newargv, *argv0; + const char *errstr; + extern char *optarg; + extern int optind; + enum scp_mode_e mode = MODE_SFTP; + char *sftp_direct = NULL; + long long llv; + + /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ + sanitise_stdfd(); + + msetlocale(); + + /* Copy argv, because we modify it */ + argv0 = argv[0]; + 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]); + + log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2); + + 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, "-oPermitLocalCommand=no"); + addargs(&args, "-oClearAllForwardings=yes"); + addargs(&args, "-oRemoteCommand=none"); + addargs(&args, "-oRequestTTY=no"); + + fflag = Tflag = tflag = 0; + while ((ch = getopt(argc, argv, + "12346ABCTdfOpqRrstvD:F:J:M:P:S:c:i:l:o:X:")) != -1) { + switch (ch) { + /* User-visible flags. */ + case '1': + fatal("SSH protocol v.1 is no longer supported"); + break; + case '2': + /* Ignored */ + break; + case 'A': + case '4': + case '6': + case 'C': + addargs(&args, "-%c", ch); + addargs(&remote_remote_args, "-%c", ch); + break; + case 'D': + sftp_direct = optarg; + break; + case '3': + throughlocal = 1; + break; + case 'R': + throughlocal = 0; + break; + case 'o': + case 'c': + case 'i': + case 'F': + case 'J': + addargs(&remote_remote_args, "-%c", ch); + addargs(&remote_remote_args, "%s", optarg); + addargs(&args, "-%c", ch); + addargs(&args, "%s", optarg); + break; + case 'O': + mode = MODE_SCP; + break; + case 's': + mode = MODE_SFTP; + 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"); + if (verbose_mode == 0) + log_level = SYSLOG_LEVEL_DEBUG1; + else if (log_level < SYSLOG_LEVEL_DEBUG3) + log_level++; + verbose_mode = 1; + break; + case 'q': + addargs(&args, "-q"); + addargs(&remote_remote_args, "-q"); + showprogress = 0; + break; + case 'X': + /* Please keep in sync with sftp.c -X */ + if (strncmp(optarg, "buffer=", 7) == 0) { + r = scan_scaled(optarg + 7, &llv); + if (r == 0 && (llv <= 0 || llv > 256 * 1024)) { + r = -1; + errno = EINVAL; + } + if (r == -1) { + fatal("Invalid buffer size \"%s\": %s", + optarg + 7, strerror(errno)); + } + sftp_copy_buflen = (size_t)llv; + } else if (strncmp(optarg, "nrequests=", 10) == 0) { + llv = strtonum(optarg + 10, 1, 256 * 1024, + &errstr); + if (errstr != NULL) { + fatal("Invalid number of requests " + "\"%s\": %s", optarg + 10, errstr); + } + sftp_nrequests = (size_t)llv; + } else { + fatal("Invalid -X option"); + } + 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; + case 'T': + Tflag = 1; + break; + default: + usage(); + } + } + argc -= optind; + argv += optind; + + log_init(argv0, log_level, SYSLOG_FACILITY_USER, 2); + + /* Do this last because we want the user to be able to override it */ + addargs(&args, "-oForwardAgent=no"); + + if (iamremote) + mode = MODE_SCP; + + 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, NULL); + 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) ssh_signal(SIGPIPE, lostconn); + + if (colon(argv[argc - 1])) /* Dest is remote host. */ + toremote(argc, argv, mode, sftp_direct); + else { + if (targetshouldbedirectory) + verifydir(argv[argc - 1]); + tolocal(argc, argv, mode, sftp_direct); /* 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 && (mode == MODE_SFTP || 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; + refresh_progress_meter(0); + 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; +} + +/* Appends a string to an array; returns 0 on success, -1 on alloc failure */ +static int +append(char *cp, char ***ap, size_t *np) +{ + char **tmp; + + if ((tmp = reallocarray(*ap, *np + 1, sizeof(*tmp))) == NULL) + return -1; + tmp[(*np)] = cp; + (*np)++; + *ap = tmp; + return 0; +} + +/* + * Finds the start and end of the first brace pair in the pattern. + * returns 0 on success or -1 for invalid patterns. + */ +static int +find_brace(const char *pattern, int *startp, int *endp) +{ + int i; + int in_bracket, brace_level; + + *startp = *endp = -1; + in_bracket = brace_level = 0; + for (i = 0; i < INT_MAX && *endp < 0 && pattern[i] != '\0'; i++) { + switch (pattern[i]) { + case '\\': + /* skip next character */ + if (pattern[i + 1] != '\0') + i++; + break; + case '[': + in_bracket = 1; + break; + case ']': + in_bracket = 0; + break; + case '{': + if (in_bracket) + break; + if (pattern[i + 1] == '}') { + /* Protect a single {}, for find(1), like csh */ + i++; /* skip */ + break; + } + if (*startp == -1) + *startp = i; + brace_level++; + break; + case '}': + if (in_bracket) + break; + if (*startp < 0) { + /* Unbalanced brace */ + return -1; + } + if (--brace_level <= 0) + *endp = i; + break; + } + } + /* unbalanced brackets/braces */ + if (*endp < 0 && (*startp >= 0 || in_bracket)) + return -1; + return 0; +} + +/* + * Assembles and records a successfully-expanded pattern, returns -1 on + * alloc failure. + */ +static int +emit_expansion(const char *pattern, int brace_start, int brace_end, + int sel_start, int sel_end, char ***patternsp, size_t *npatternsp) +{ + char *cp; + size_t pattern_len; + int o = 0, tail_len; + + if ((pattern_len = strlen(pattern)) == 0 || pattern_len >= INT_MAX) + return -1; + + tail_len = strlen(pattern + brace_end + 1); + if ((cp = malloc(brace_start + (sel_end - sel_start) + + tail_len + 1)) == NULL) + return -1; + + /* Pattern before initial brace */ + if (brace_start > 0) { + memcpy(cp, pattern, brace_start); + o = brace_start; + } + /* Current braced selection */ + if (sel_end - sel_start > 0) { + memcpy(cp + o, pattern + sel_start, + sel_end - sel_start); + o += sel_end - sel_start; + } + /* Remainder of pattern after closing brace */ + if (tail_len > 0) { + memcpy(cp + o, pattern + brace_end + 1, tail_len); + o += tail_len; + } + cp[o] = '\0'; + if (append(cp, patternsp, npatternsp) != 0) { + free(cp); + return -1; + } + return 0; +} + +/* + * Expand the first encountered brace in pattern, appending the expanded + * patterns it yielded to the *patternsp array. + * + * Returns 0 on success or -1 on allocation failure. + * + * Signals whether expansion was performed via *expanded and whether + * pattern was invalid via *invalid. + */ +static int +brace_expand_one(const char *pattern, char ***patternsp, size_t *npatternsp, + int *expanded, int *invalid) +{ + int i; + int in_bracket, brace_start, brace_end, brace_level; + int sel_start, sel_end; + + *invalid = *expanded = 0; + + if (find_brace(pattern, &brace_start, &brace_end) != 0) { + *invalid = 1; + return 0; + } else if (brace_start == -1) + return 0; + + in_bracket = brace_level = 0; + for (i = sel_start = brace_start + 1; i < brace_end; i++) { + switch (pattern[i]) { + case '{': + if (in_bracket) + break; + brace_level++; + break; + case '}': + if (in_bracket) + break; + brace_level--; + break; + case '[': + in_bracket = 1; + break; + case ']': + in_bracket = 0; + break; + case '\\': + if (i < brace_end - 1) + i++; /* skip */ + break; + } + if (pattern[i] == ',' || i == brace_end - 1) { + if (in_bracket || brace_level > 0) + continue; + /* End of a selection, emit an expanded pattern */ + + /* Adjust end index for last selection */ + sel_end = (i == brace_end - 1) ? brace_end : i; + if (emit_expansion(pattern, brace_start, brace_end, + sel_start, sel_end, patternsp, npatternsp) != 0) + return -1; + /* move on to the next selection */ + sel_start = i + 1; + continue; + } + } + if (in_bracket || brace_level > 0) { + *invalid = 1; + return 0; + } + /* success */ + *expanded = 1; + return 0; +} + +/* Expand braces from pattern. Returns 0 on success, -1 on failure */ +static int +brace_expand(const char *pattern, char ***patternsp, size_t *npatternsp) +{ + char *cp, *cp2, **active = NULL, **done = NULL; + size_t i, nactive = 0, ndone = 0; + int ret = -1, invalid = 0, expanded = 0; + + *patternsp = NULL; + *npatternsp = 0; + + /* Start the worklist with the original pattern */ + if ((cp = strdup(pattern)) == NULL) + return -1; + if (append(cp, &active, &nactive) != 0) { + free(cp); + return -1; + } + while (nactive > 0) { + cp = active[nactive - 1]; + nactive--; + if (brace_expand_one(cp, &active, &nactive, + &expanded, &invalid) == -1) { + free(cp); + goto fail; + } + if (invalid) + fatal_f("invalid brace pattern \"%s\"", cp); + if (expanded) { + /* + * Current entry expanded to new entries on the + * active list; discard the progenitor pattern. + */ + free(cp); + continue; + } + /* + * Pattern did not expand; append the finename component to + * the completed list + */ + if ((cp2 = strrchr(cp, '/')) != NULL) + *cp2++ = '\0'; + else + cp2 = cp; + if (append(xstrdup(cp2), &done, &ndone) != 0) { + free(cp); + goto fail; + } + free(cp); + } + /* success */ + *patternsp = done; + *npatternsp = ndone; + done = NULL; + ndone = 0; + ret = 0; + fail: + for (i = 0; i < nactive; i++) + free(active[i]); + free(active); + for (i = 0; i < ndone; i++) + free(done[i]); + free(done); + return ret; +} + +static struct sftp_conn * +do_sftp_connect(char *host, char *user, int port, char *sftp_direct, + int *reminp, int *remoutp, int *pidp) +{ + if (sftp_direct == NULL) { + if (do_cmd(ssh_program, host, user, port, 1, "sftp", + reminp, remoutp, pidp) < 0) + return NULL; + + } else { + freeargs(&args); + addargs(&args, "sftp-server"); + if (do_cmd(sftp_direct, host, NULL, -1, 0, "sftp", + reminp, remoutp, pidp) < 0) + return NULL; + } + return sftp_init(*reminp, *remoutp, + sftp_copy_buflen, sftp_nrequests, limit_kbps); +} + +void +toremote(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct) +{ + char *suser = NULL, *host = NULL, *src = NULL; + char *bp, *tuser, *thost, *targ; + int sport = -1, tport = -1; + struct sftp_conn *conn = NULL, *conn2 = NULL; + arglist alist; + int i, r, status; + struct stat sb; + 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; + } + } + + /* 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 */ + if (mode == MODE_SFTP) { + if (remin == -1) { + /* Connect to dest now */ + conn = do_sftp_connect(thost, tuser, + tport, sftp_direct, + &remin, &remout, &do_cmd_pid); + if (conn == NULL) { + fatal("Unable to open " + "destination connection"); + } + debug3_f("origin in %d out %d pid %ld", + remin, remout, (long)do_cmd_pid); + } + /* + * XXX remember suser/host/sport and only + * reconnect if they change between arguments. + * would save reconnections for cases like + * scp -3 hosta:/foo hosta:/bar hostb: + */ + /* Connect to origin now */ + conn2 = do_sftp_connect(host, suser, + sport, sftp_direct, + &remin2, &remout2, &do_cmd_pid2); + if (conn2 == NULL) { + fatal("Unable to open " + "source connection"); + } + debug3_f("destination in %d out %d pid %ld", + remin2, remout2, (long)do_cmd_pid2); + throughlocal_sftp(conn2, conn, src, targ); + (void) close(remin2); + (void) close(remout2); + remin2 = remout2 = -1; + if (waitpid(do_cmd_pid2, &status, 0) == -1) + ++errs; + else if (!WIFEXITED(status) || + WEXITSTATUS(status) != 0) + ++errs; + do_cmd_pid2 = -1; + continue; + } else { + xasprintf(&bp, "%s -f %s%s", cmd, + *src == '-' ? "-- " : "", src); + if (do_cmd(ssh_program, host, suser, sport, 0, + bp, &remin, &remout, &do_cmd_pid) < 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 */ + /* + * Second remote user is passed to first remote side + * via scp command-line. Ensure it contains no obvious + * shell characters. + */ + if (tuser != NULL && !okname(tuser)) { + ++errs; + continue; + } + if (tport != -1 && tport != SSH_DEFAULT_PORT) { + /* This would require the remote support URIs */ + fatal("target port not supported with two " + "remote hosts and the -R 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 (mode == MODE_SFTP) { + /* no need to glob: already done by shell */ + if (stat(argv[i], &sb) != 0) { + fatal("stat local \"%s\": %s", argv[i], + strerror(errno)); + } + if (remin == -1) { + /* Connect to remote now */ + conn = do_sftp_connect(thost, tuser, + tport, sftp_direct, + &remin, &remout, &do_cmd_pid); + if (conn == NULL) { + fatal("Unable to open sftp " + "connection"); + } + } + + /* The protocol */ + source_sftp(1, argv[i], targ, conn); + continue; + } + /* SCP */ + if (remin == -1) { + xasprintf(&bp, "%s -t %s%s", cmd, + *targ == '-' ? "-- " : "", targ); + if (do_cmd(ssh_program, thost, tuser, tport, 0, + bp, &remin, &remout, &do_cmd_pid) < 0) + exit(1); + if (response() < 0) + exit(1); + free(bp); + } + source(1, argv + i); + } + } +out: + if (mode == MODE_SFTP) + free(conn); + free(tuser); + free(thost); + free(targ); + free(suser); + free(host); + free(src); +} + +void +tolocal(int argc, char **argv, enum scp_mode_e mode, char *sftp_direct) +{ + char *bp, *host = NULL, *src = NULL, *suser = NULL; + arglist alist; + struct sftp_conn *conn = NULL; + 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. */ + if (mode == MODE_SFTP) { + conn = do_sftp_connect(host, suser, sport, + sftp_direct, &remin, &remout, &do_cmd_pid); + if (conn == NULL) { + error("sftp connection failed"); + ++errs; + continue; + } + + /* The protocol */ + sink_sftp(1, argv[argc - 1], src, conn); + + free(conn); + (void) close(remin); + (void) close(remout); + remin = remout = -1; + continue; + } + /* SCP */ + xasprintf(&bp, "%s -f %s%s", + cmd, *src == '-' ? "-- " : "", src); + if (do_cmd(ssh_program, host, suser, sport, 0, bp, + &remin, &remout, &do_cmd_pid) < 0) { + free(bp); + ++errs; + continue; + } + free(bp); + sink(1, argv + argc - 1, src); + (void) close(remin); + remin = remout = -1; + } + free(suser); + free(host); + free(src); +} + +/* Prepare remote path, handling ~ by assuming cwd is the homedir */ +static char * +prepare_remote_path(struct sftp_conn *conn, const char *path) +{ + size_t nslash; + + /* Handle ~ prefixed paths */ + if (*path == '\0' || strcmp(path, "~") == 0) + return xstrdup("."); + if (*path != '~') + return xstrdup(path); + if (strncmp(path, "~/", 2) == 0) { + if ((nslash = strspn(path + 2, "/")) == strlen(path + 2)) + return xstrdup("."); + return xstrdup(path + 2 + nslash); + } + if (sftp_can_expand_path(conn)) + return sftp_expand_path(conn, path); + /* No protocol extension */ + error("server expand-path extension is required " + "for ~user paths in SFTP mode"); + return NULL; +} + +void +source_sftp(int argc, char *src, char *targ, struct sftp_conn *conn) +{ + char *target = NULL, *filename = NULL, *abs_dst = NULL; + int src_is_dir, target_is_dir; + Attrib a; + struct stat st; + + memset(&a, '\0', sizeof(a)); + if (stat(src, &st) != 0) + fatal("stat local \"%s\": %s", src, strerror(errno)); + src_is_dir = S_ISDIR(st.st_mode); + if ((filename = basename(src)) == NULL) + fatal("basename \"%s\": %s", src, strerror(errno)); + + /* + * No need to glob here - the local shell already took care of + * the expansions + */ + if ((target = prepare_remote_path(conn, targ)) == NULL) + cleanup_exit(255); + target_is_dir = sftp_remote_is_dir(conn, target); + if (targetshouldbedirectory && !target_is_dir) { + debug("target directory \"%s\" does not exist", target); + a.flags = SSH2_FILEXFER_ATTR_PERMISSIONS; + a.perm = st.st_mode | 0700; /* ensure writable */ + if (sftp_mkdir(conn, target, &a, 1) != 0) + cleanup_exit(255); /* error already logged */ + target_is_dir = 1; + } + if (target_is_dir) + abs_dst = sftp_path_append(target, filename); + else { + abs_dst = target; + target = NULL; + } + debug3_f("copying local %s to remote %s", src, abs_dst); + + if (src_is_dir && iamrecursive) { + if (sftp_upload_dir(conn, src, abs_dst, pflag, + SFTP_PROGRESS_ONLY, 0, 0, 1, 1) != 0) { + error("failed to upload directory %s to %s", src, targ); + errs = 1; + } + } else if (sftp_upload(conn, src, abs_dst, pflag, 0, 0, 1) != 0) { + error("failed to upload file %s to %s", src, targ); + errs = 1; + } + + free(abs_dst); + free(target); +} + +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[PATH_MAX + 128], 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)) == -1) + goto syserr; + if (strchr(name, '\n') != NULL) { + strnvis(encname, name, sizeof(encname), VIS_NL); + name = encname; + } + if (fstat(fd, &stb) == -1) { +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) == -1 && !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_sftp(int argc, char *dst, const char *src, struct sftp_conn *conn) +{ + char *abs_src = NULL; + char *abs_dst = NULL; + glob_t g; + char *filename, *tmp = NULL; + int i, r, err = 0, dst_is_dir; + struct stat st; + + memset(&g, 0, sizeof(g)); + + /* + * Here, we need remote glob as SFTP can not depend on remote shell + * expansions + */ + if ((abs_src = prepare_remote_path(conn, src)) == NULL) { + err = -1; + goto out; + } + + debug3_f("copying remote %s to local %s", abs_src, dst); + if ((r = sftp_glob(conn, abs_src, GLOB_NOCHECK|GLOB_MARK, + NULL, &g)) != 0) { + if (r == GLOB_NOSPACE) + error("%s: too many glob matches", src); + else + error("%s: %s", src, strerror(ENOENT)); + err = -1; + goto out; + } + + /* Did we actually get any matches back from the glob? */ + if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) { + /* + * If nothing matched but a path returned, then it's probably + * a GLOB_NOCHECK result. Check whether the unglobbed path + * exists so we can give a nice error message early. + */ + if (sftp_stat(conn, g.gl_pathv[0], 1, NULL) != 0) { + error("%s: %s", src, strerror(ENOENT)); + err = -1; + goto out; + } + } + + if ((r = stat(dst, &st)) != 0) + debug2_f("stat local \"%s\": %s", dst, strerror(errno)); + dst_is_dir = r == 0 && S_ISDIR(st.st_mode); + + if (g.gl_matchc > 1 && !dst_is_dir) { + if (r == 0) { + error("Multiple files match pattern, but destination " + "\"%s\" is not a directory", dst); + err = -1; + goto out; + } + debug2_f("creating destination \"%s\"", dst); + if (mkdir(dst, 0777) != 0) { + error("local mkdir \"%s\": %s", dst, strerror(errno)); + err = -1; + goto out; + } + dst_is_dir = 1; + } + + for (i = 0; g.gl_pathv[i] && !interrupted; i++) { + tmp = xstrdup(g.gl_pathv[i]); + if ((filename = basename(tmp)) == NULL) { + error("basename %s: %s", tmp, strerror(errno)); + err = -1; + goto out; + } + + if (dst_is_dir) + abs_dst = sftp_path_append(dst, filename); + else + abs_dst = xstrdup(dst); + + debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); + if (sftp_globpath_is_dir(g.gl_pathv[i]) && iamrecursive) { + if (sftp_download_dir(conn, g.gl_pathv[i], abs_dst, + NULL, pflag, SFTP_PROGRESS_ONLY, 0, 0, 1, 1) == -1) + err = -1; + } else { + if (sftp_download(conn, g.gl_pathv[i], abs_dst, NULL, + pflag, 0, 0, 1) == -1) + err = -1; + } + free(abs_dst); + abs_dst = NULL; + free(tmp); + tmp = NULL; + } + +out: + free(abs_src); + free(tmp); + globfree(&g); + if (err == -1) + errs = 1; +} + + +#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, const char *src) +{ + static BUF buffer; + struct stat stb; + 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, wrerr; + char ch, *cp, *np, *targ, *why, *vect[1], buf[2048], visbuf[2048]; + char **patterns = NULL; + size_t n, npatterns = 0; + 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; + if (src != NULL && !iamrecursive && !Tflag) { + /* + * Prepare to try to restrict incoming filenames to match + * the requested destination file glob. + */ + if (brace_expand(src, &patterns, &npatterns) != 0) + fatal_f("could not expand pattern"); + } + for (first = 1;; first = 0) { + cp = buf; + if (atomicio(read, remin, cp, 1) != 1) + goto done; + if (*cp++ == '\n') + SCREWUP("unexpected "); + 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); + goto done; + } + 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 (*cp == '\0' || strchr(cp, '/') != NULL || + strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) { + run_err("error: unexpected filename: %s", cp); + exit(1); + } + if (npatterns > 0) { + for (n = 0; n < npatterns; n++) { + if (strcmp(patterns[n], cp) == 0 || + fnmatch(patterns[n], cp, 0) == 0) + break; + } + if (n >= npatterns) { + debug2_f("incoming filename \"%s\" does not " + "match any of %zu expected patterns", cp, + npatterns); + for (n = 0; n < npatterns; n++) { + debug3_f("expected pattern %zu: \"%s\"", + n, patterns[n]); + } + SCREWUP("filename does not match request"); + } + } + 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) == -1) + goto bad; + } + vect[0] = xstrdup(np); + sink(1, vect, src); + if (setimes) { + setimes = 0; + (void) utimes(vect[0], tv); + } + 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)) == -1) { +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 = 0; + + /* + * NB. do not use run_err() unless immediately followed by + * exit() below as it may send a spurious reply that might + * desyncronise us from the peer. Use note_err() instead. + */ + 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) { + if (atomicio(vwrite, ofd, bp->buf, + count) != count) { + note_err("%s: %s", np, + strerror(errno)); + wrerr = 1; + } + } + count = 0; + cp = bp->buf; + } + } + unset_nonblock(remin); + if (count != 0 && !wrerr && + atomicio(vwrite, ofd, bp->buf, count) != count) { + note_err("%s: %s", np, strerror(errno)); + wrerr = 1; + } + if (!wrerr && (!exists || S_ISREG(stb.st_mode)) && + ftruncate(ofd, size) != 0) + note_err("%s: truncate: %s", np, strerror(errno)); + if (pflag) { + if (exists || omode != mode) +#ifdef HAVE_FCHMOD + if (fchmod(ofd, omode)) { +#else /* HAVE_FCHMOD */ + if (chmod(np, omode)) { +#endif /* HAVE_FCHMOD */ + note_err("%s: set mode: %s", + np, strerror(errno)); + } + } else { + if (!exists && omode != mode) +#ifdef HAVE_FCHMOD + if (fchmod(ofd, omode & ~mask)) { +#else /* HAVE_FCHMOD */ + if (chmod(np, omode & ~mask)) { +#endif /* HAVE_FCHMOD */ + note_err("%s: set mode: %s", + np, strerror(errno)); + } + } + if (close(ofd) == -1) + note_err("%s: close: %s", np, strerror(errno)); + (void) response(); + if (showprogress) + stop_progress_meter(); + if (setimes && !wrerr) { + setimes = 0; + if (utimes(np, tv) == -1) { + note_err("%s: set times: %s", + np, strerror(errno)); + } + } + /* If no error was noted then signal success for this file */ + if (note_err(NULL) == 0) + (void) atomicio(vwrite, remout, "", 1); + } +done: + for (n = 0; n < npatterns; n++) + free(patterns[n]); + free(patterns); + return; +screwup: + for (n = 0; n < npatterns; n++) + free(patterns[n]); + free(patterns); + run_err("protocol error: %s", why); + exit(1); +} + +void +throughlocal_sftp(struct sftp_conn *from, struct sftp_conn *to, + char *src, char *targ) +{ + char *target = NULL, *filename = NULL, *abs_dst = NULL; + char *abs_src = NULL, *tmp = NULL; + glob_t g; + int i, r, targetisdir, err = 0; + + if ((filename = basename(src)) == NULL) + fatal("basename %s: %s", src, strerror(errno)); + + if ((abs_src = prepare_remote_path(from, src)) == NULL || + (target = prepare_remote_path(to, targ)) == NULL) + cleanup_exit(255); + memset(&g, 0, sizeof(g)); + + targetisdir = sftp_remote_is_dir(to, target); + if (!targetisdir && targetshouldbedirectory) { + error("%s: destination is not a directory", targ); + err = -1; + goto out; + } + + debug3_f("copying remote %s to remote %s", abs_src, target); + if ((r = sftp_glob(from, abs_src, GLOB_NOCHECK|GLOB_MARK, + NULL, &g)) != 0) { + if (r == GLOB_NOSPACE) + error("%s: too many glob matches", src); + else + error("%s: %s", src, strerror(ENOENT)); + err = -1; + goto out; + } + + /* Did we actually get any matches back from the glob? */ + if (g.gl_matchc == 0 && g.gl_pathc == 1 && g.gl_pathv[0] != 0) { + /* + * If nothing matched but a path returned, then it's probably + * a GLOB_NOCHECK result. Check whether the unglobbed path + * exists so we can give a nice error message early. + */ + if (sftp_stat(from, g.gl_pathv[0], 1, NULL) != 0) { + error("%s: %s", src, strerror(ENOENT)); + err = -1; + goto out; + } + } + + for (i = 0; g.gl_pathv[i] && !interrupted; i++) { + tmp = xstrdup(g.gl_pathv[i]); + if ((filename = basename(tmp)) == NULL) { + error("basename %s: %s", tmp, strerror(errno)); + err = -1; + goto out; + } + + if (targetisdir) + abs_dst = sftp_path_append(target, filename); + else + abs_dst = xstrdup(target); + + debug("Fetching %s to %s\n", g.gl_pathv[i], abs_dst); + if (sftp_globpath_is_dir(g.gl_pathv[i]) && iamrecursive) { + if (sftp_crossload_dir(from, to, g.gl_pathv[i], abs_dst, + NULL, pflag, SFTP_PROGRESS_ONLY, 1) == -1) + err = -1; + } else { + if (sftp_crossload(from, to, g.gl_pathv[i], abs_dst, + NULL, pflag) == -1) + err = -1; + } + free(abs_dst); + abs_dst = NULL; + free(tmp); + tmp = NULL; + } + +out: + free(abs_src); + free(abs_dst); + free(target); + free(tmp); + globfree(&g); + if (err == -1) + errs = 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 [-346ABCOpqRrsTv] [-c cipher] [-D sftp_server_path] [-F ssh_config]\n" + " [-i identity_file] [-J destination] [-l limit] [-o ssh_option]\n" + " [-P port] [-S program] [-X sftp_option] 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"); + } +} + +/* + * Notes a sink error for sending at the end of a file transfer. Returns 0 if + * no error has been noted or -1 otherwise. Use note_err(NULL) to flush + * any active error at the end of the transfer. + */ +int +note_err(const char *fmt, ...) +{ + static char *emsg; + va_list ap; + + /* Replay any previously-noted error */ + if (fmt == NULL) { + if (emsg == NULL) + return 0; + run_err("%s", emsg); + free(emsg); + emsg = NULL; + return -1; + } + + errs++; + /* Prefer first-noted error */ + if (emsg != NULL) + return -1; + + va_start(ap, fmt); + vasnmprintf(&emsg, INT_MAX, NULL, fmt, ap); + va_end(ap); + return -1; +} + +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) == -1) { + 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); +} + +void +cleanup_exit(int i) +{ + if (remin > 0) + close(remin); + if (remout > 0) + close(remout); + if (remin2 > 0) + close(remin2); + if (remout2 > 0) + close(remout2); + if (do_cmd_pid > 0) + (void)waitpid(do_cmd_pid, NULL, 0); + if (do_cmd_pid2 > 0) + (void)waitpid(do_cmd_pid2, NULL, 0); + exit(i); +} -- cgit v1.2.3