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-rw-r--r--src/scp.c1259
1 files changed, 1259 insertions, 0 deletions
diff --git a/src/scp.c b/src/scp.c
new file mode 100644
index 0000000..72e04f8
--- /dev/null
+++ b/src/scp.c
@@ -0,0 +1,1259 @@
+/* Dropbear Note: This file is based on OpenSSH 4.3p2. Avoid unnecessary
+ changes to simplify future updates */
+
+/*
+ * 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"
+/*RCSID("$OpenBSD: scp.c,v 1.130 2006/01/31 10:35:43 djm Exp $");*/
+
+#include "atomicio.h"
+#include "compat.h"
+#include "scpmisc.h"
+#include "progressmeter.h"
+
+void bwlimit(int);
+
+/* Struct for addargs */
+arglist args;
+
+/* Bandwidth limit */
+off_t limit_rate = 0;
+
+/* 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 the program to execute for the secured connection. ("ssh" or -S) */
+char *ssh_program = DROPBEAR_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 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++)
+ fprintf(stderr, " %s", a->list[i]);
+ fprintf(stderr, "\n");
+ }
+#if DROPBEAR_VFORK
+ pid = vfork();
+#else
+ pid = fork();
+#endif
+ if (pid == -1)
+ fatal("do_local_cmd: fork: %s", strerror(errno));
+
+ if (pid == 0) {
+ execvp(a->list[0], a->list);
+ perror(a->list[0]);
+#if DROPBEAR_VFORK
+ _exit(1);
+#else
+ exit(1);
+#endif
+ }
+
+ 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.
+ */
+
+static void
+arg_setup(char *host, char *remuser, char *cmd)
+{
+ replacearg(&args, 0, "%s", ssh_program);
+ if (remuser != NULL)
+ addargs(&args, "-l%s", remuser);
+ addargs(&args, "%s", host);
+ addargs(&args, "%s", cmd);
+}
+
+int
+do_cmd(char *host, char *remuser, char *cmd, int *fdin, int *fdout)
+{
+ int pin[2], pout[2], reserved[2];
+
+ if (verbose_mode)
+ fprintf(stderr,
+ "Executing: program %s host %s, user %s, command %s\n",
+ ssh_program, host,
+ remuser ? remuser : "(unspecified)", cmd);
+
+ /*
+ * Reserve two descriptors so that the real pipes won't get
+ * descriptors 0 and 1 because that will screw up dup2 below.
+ */
+ pipe(reserved);
+
+ /* 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]);
+
+ /* uClinux needs to build the args here before vforking,
+ otherwise we do it later on. */
+#if DROPBEAR_VFORK
+ arg_setup(host, remuser, cmd);
+#endif
+
+ /* Fork a child to execute the command on the remote host using ssh. */
+#if DROPBEAR_VFORK
+ do_cmd_pid = vfork();
+#else
+ do_cmd_pid = fork();
+#endif
+
+ 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]);
+
+#if !DROPBEAR_VFORK
+ arg_setup(host, remuser, cmd);
+#endif
+
+ execvp(ssh_program, args.list);
+ perror(ssh_program);
+#if DROPBEAR_VFORK
+ _exit(1);
+#else
+ exit(1);
+#endif
+ } else if (do_cmd_pid == -1) {
+ fatal("fork: %s", strerror(errno));
+ }
+
+#if DROPBEAR_VFORK
+ /* clean up command */
+ /* pop cmd */
+ xfree(args.list[args.num-1]);
+ args.list[args.num-1]=NULL;
+ args.num--;
+ /* pop host */
+ xfree(args.list[args.num-1]);
+ args.list[args.num-1]=NULL;
+ args.num--;
+ /* pop user */
+ if (remuser != NULL) {
+ xfree(args.list[args.num-1]);
+ args.list[args.num-1]=NULL;
+ args.num--;
+ }
+#endif
+
+ /* 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;
+}
+
+typedef struct {
+ size_t cnt;
+ char *buf;
+} BUF;
+
+BUF *allocbuf(BUF *, int, int);
+void lostconn(int);
+void nospace(void);
+int okname(char *);
+void run_err(const char *,...);
+void verifydir(char *);
+
+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);
+
+#if defined(DBMULTI_scp) || !DROPBEAR_MULTI
+#if defined(DBMULTI_scp) && DROPBEAR_MULTI
+int scp_main(int argc, char **argv)
+#else
+int
+main(int argc, char **argv)
+#endif
+{
+ int ch, fflag, tflag, status;
+ double speed;
+ char *targ, *endp;
+ extern char *optarg;
+ extern int optind;
+
+ /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
+ sanitise_stdfd();
+
+ memset(&args, '\0', sizeof(args));
+ args.list = NULL;
+ addargs(&args, "%s", ssh_program);
+
+ fflag = tflag = 0;
+ while ((ch = getopt(argc, argv, "dfl:prtvBCc:i:P:q1246S:o:F:")) != -1)
+ switch (ch) {
+ /* User-visible flags. */
+ case '1':
+ case '2':
+ case '4':
+ case '6':
+ case 'C':
+ addargs(&args, "-%c", ch);
+ break;
+ case 'o':
+ case 'c':
+ case 'i':
+ case 'F':
+ addargs(&args, "-%c%s", ch, optarg);
+ break;
+ case 'P':
+ addargs(&args, "-p%s", optarg);
+ break;
+ case 'B':
+ fprintf(stderr, "Note: -B option is disabled in this version of scp");
+ break;
+ case 'l':
+ speed = strtod(optarg, &endp);
+ if (speed <= 0 || *endp != '\0')
+ usage();
+ limit_rate = speed * 1024;
+ break;
+ case 'p':
+ pflag = 1;
+ break;
+ case 'r':
+ iamrecursive = 1;
+ break;
+ case 'S':
+ ssh_program = xstrdup(optarg);
+ break;
+ case 'v':
+ addargs(&args, "-v");
+ verbose_mode = 1;
+ break;
+ case 'q':
+#ifdef PROGRESS_METER
+ addargs(&args, "-q");
+ showprogress = 0;
+#endif
+ 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 (!isatty(STDERR_FILENO))
+ showprogress = 0;
+
+ 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);
+}
+#endif /* DBMULTI_scp stuff */
+
+void
+toremote(char *targ, int argc, char **argv)
+{
+ int i, len;
+ char *bp, *host, *src, *suser, *thost, *tuser, *arg;
+ arglist alist;
+
+ 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)) {
+ xfree(arg);
+ return;
+ }
+
+ for (i = 0; i < argc - 1; i++) {
+ src = colon(argv[i]);
+ if (src) { /* remote to remote */
+ freeargs(&alist);
+ addargs(&alist, "%s", ssh_program);
+ if (verbose_mode)
+ addargs(&alist, "-v");
+#if 0
+ /* Disabled since dbclient won't understand them
+ and scp works fine without them. */
+ addargs(&alist, "-x");
+ addargs(&alist, "-oClearAllForwardings yes");
+ addargs(&alist, "-n");
+#endif
+
+ *src++ = 0;
+ if (*src == 0)
+ src = ".";
+ host = strrchr(argv[i], '@');
+
+ if (host) {
+ *host++ = 0;
+ host = cleanhostname(host);
+ suser = argv[i];
+ if (*suser == '\0')
+ continue; /* pretend there wasn't any @ at all */
+ else if (!okname(suser))
+ continue;
+ addargs(&alist, "-l");
+ addargs(&alist, "%s", suser);
+ } else {
+ host = cleanhostname(argv[i]);
+ }
+ 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) {
+ len = strlen(targ) + CMDNEEDS + 20;
+ bp = xmalloc(len);
+ (void) snprintf(bp, len, "%s -t %s", cmd, targ);
+ host = cleanhostname(thost);
+ if (do_cmd(host, tuser, bp, &remin, &remout) < 0)
+ exit(1);
+ if (response() < 0)
+ exit(1);
+ (void) xfree(bp);
+ }
+ source(1, argv + i);
+ }
+ }
+}
+
+void
+tolocal(int argc, char **argv)
+{
+ int i, len;
+ char *bp, *host, *src, *suser;
+ arglist alist;
+
+ 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, "%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 = NULL;
+ }
+ host = cleanhostname(host);
+ len = strlen(src) + CMDNEEDS + 20;
+ bp = xmalloc(len);
+ (void) snprintf(bp, len, "%s -f %s", cmd, src);
+ if (do_cmd(host, suser, bp, &remin, &remout) < 0) {
+ (void) xfree(bp);
+ ++errs;
+ continue;
+ }
+ xfree(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, amt, statbytes;
+ size_t result;
+ int fd = -1, haderr, indx;
+ char *last, *name, buf[2048];
+ int len;
+
+ for (indx = 0; indx < argc; ++indx) {
+ name = argv[indx];
+ statbytes = 0;
+ len = strlen(name);
+ while (len > 1 && name[len-1] == '/')
+ name[--len] = '\0';
+ if (strchr(name, '\n') != NULL) {
+ run_err("%s: skipping, filename contains a newline",
+ name);
+ goto next;
+ }
+ if ((fd = open(name, O_RDONLY, 0)) < 0)
+ goto syserr;
+ if (fstat(fd, &stb) < 0) {
+syserr: run_err("%s: %s", name, strerror(errno));
+ goto next;
+ }
+ switch (stb.st_mode & S_IFMT) {
+ case S_IFREG:
+ break;
+ case S_IFDIR:
+ if (iamrecursive) {
+ rsource(name, &stb);
+ goto next;
+ }
+ /* FALLTHROUGH */
+ default:
+ run_err("%s: not a regular file", name);
+ goto next;
+ }
+ if ((last = strrchr(name, '/')) == NULL)
+ last = name;
+ else
+ ++last;
+ curfile = last;
+ if (pflag) {
+ /*
+ * Make it compatible with possible future
+ * versions expecting microseconds.
+ */
+ (void) snprintf(buf, sizeof buf, "T%lu 0 %lu 0\n",
+ (u_long) stb.st_mtime,
+ (u_long) stb.st_atime);
+ (void) atomicio(vwrite, remout, buf, strlen(buf));
+ if (response() < 0)
+ goto next;
+ }
+#define FILEMODEMASK (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
+ snprintf(buf, sizeof buf, "C%04o %lld %s\n",
+ (u_int) (stb.st_mode & FILEMODEMASK),
+ (long long)stb.st_size, last);
+ if (verbose_mode) {
+ fprintf(stderr, "Sending file modes: %s", buf);
+ }
+ (void) atomicio(vwrite, remout, buf, strlen(buf));
+ if (response() < 0)
+ goto next;
+ if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) {
+next: if (fd != -1) {
+ (void) close(fd);
+ fd = -1;
+ }
+ continue;
+ }
+#ifdef PROGRESS_METER
+ if (showprogress)
+ start_progress_meter(curfile, stb.st_size, &statbytes);
+#endif
+ /* Keep writing after an error so that we stay sync'd up. */
+ for (haderr = i = 0; i < stb.st_size; i += bp->cnt) {
+ amt = bp->cnt;
+ if (i + amt > stb.st_size)
+ amt = stb.st_size - i;
+ if (!haderr) {
+ result = atomicio(read, fd, bp->buf, amt);
+ if (result != amt)
+ haderr = errno;
+ }
+ if (haderr)
+ (void) atomicio(vwrite, remout, bp->buf, amt);
+ else {
+ result = atomicio(vwrite, remout, bp->buf, amt);
+ if (result != amt)
+ haderr = errno;
+ statbytes += result;
+ }
+ if (limit_rate)
+ bwlimit(amt);
+ }
+#ifdef PROGRESS_METER
+ if (showprogress)
+ stop_progress_meter();
+#endif
+
+ 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();
+ }
+}
+
+void
+rsource(char *name, struct stat *statp)
+{
+ DIR *dirp;
+ struct dirent *dp;
+ char *last, *vect[1], path[1100];
+
+ if (!(dirp = opendir(name))) {
+ run_err("%s: %s", name, strerror(errno));
+ return;
+ }
+ last = strrchr(name, '/');
+ if (last == 0)
+ last = name;
+ else
+ last++;
+ if (pflag) {
+ (void) snprintf(path, sizeof(path), "T%lu 0 %lu 0\n",
+ (u_long) statp->st_mtime,
+ (u_long) statp->st_atime);
+ (void) atomicio(vwrite, remout, path, strlen(path));
+ if (response() < 0) {
+ closedir(dirp);
+ return;
+ }
+ }
+ (void) snprintf(path, sizeof path, "D%04o %d %.1024s\n",
+ (u_int) (statp->st_mode & FILEMODEMASK), 0, last);
+ if (verbose_mode)
+ fprintf(stderr, "Entering directory: %s", path);
+ (void) 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
+bwlimit(int amount)
+{
+ static struct timeval bwstart, bwend;
+ static int lamt = 0, thresh = 16384;
+ uint64_t waitlen;
+ struct timespec ts, rm;
+
+ if (!timerisset(&bwstart)) {
+ gettimeofday(&bwstart, NULL);
+ return;
+ }
+
+ lamt += amount;
+ if (lamt < thresh)
+ return;
+
+ gettimeofday(&bwend, NULL);
+ timersub(&bwend, &bwstart, &bwend);
+ if (!timerisset(&bwend))
+ return;
+
+ lamt *= 8;
+ waitlen = (double)1000000L * lamt / limit_rate;
+
+ bwstart.tv_sec = waitlen / 1000000L;
+ bwstart.tv_usec = waitlen % 1000000L;
+
+ if (timercmp(&bwstart, &bwend, >)) {
+ timersub(&bwstart, &bwend, &bwend);
+
+ /* Adjust the wait time */
+ if (bwend.tv_sec) {
+ thresh /= 2;
+ if (thresh < 2048)
+ thresh = 2048;
+ } else if (bwend.tv_usec < 100) {
+ thresh *= 2;
+ if (thresh > 32768)
+ thresh = 32768;
+ }
+
+ TIMEVAL_TO_TIMESPEC(&bwend, &ts);
+ while (nanosleep(&ts, &rm) == -1) {
+ if (errno != EINTR)
+ break;
+ ts = rm;
+ }
+ }
+
+ lamt = 0;
+ gettimeofday(&bwstart, NULL);
+}
+
+void
+sink(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, mask, mode, ofd, omode;
+ off_t size, statbytes;
+ int setimes, targisdir, wrerrno = 0;
+ char ch, *cp, *np, *targ, *why, *vect[1], buf[2048];
+ struct timeval tv[2];
+
+#define atime tv[0]
+#define mtime tv[1]
+#define SCREWUP(str) do { why = str; goto screwup; } while (0)
+
+ setimes = targisdir = 0;
+ mask = umask(0);
+ if (!pflag)
+ (void) umask(mask);
+ if (argc != 1) {
+ run_err("ambiguous target");
+ exit(1);
+ }
+ targ = *argv;
+ if (targetshouldbedirectory)
+ verifydir(targ);
+
+ (void) 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)
+ fprintf(stderr, "Sink: %s", buf);
+
+ if (buf[0] == '\01' || buf[0] == '\02') {
+ if (iamremote == 0)
+ (void) atomicio(vwrite, STDERR_FILENO,
+ buf + 1, strlen(buf + 1));
+ 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++;
+ mtime.tv_sec = strtol(cp, &cp, 10);
+ if (!cp || *cp++ != ' ')
+ SCREWUP("mtime.sec not delimited");
+ mtime.tv_usec = strtol(cp, &cp, 10);
+ if (!cp || *cp++ != ' ')
+ SCREWUP("mtime.usec not delimited");
+ atime.tv_sec = strtol(cp, &cp, 10);
+ if (!cp || *cp++ != ' ')
+ SCREWUP("atime.sec not delimited");
+ atime.tv_usec = strtol(cp, &cp, 10);
+ if (!cp || *cp++ != '\0')
+ SCREWUP("atime.usec not delimited");
+ (void) 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(*cp);)
+ size = size * 10 + (*cp++ - '0');
+ if (*cp++ != ' ')
+ SCREWUP("size not delimited");
+ if (*cp == '\0' || strchr(cp, '/') != NULL ||
+ strcmp(cp, ".") == 0 || strcmp(cp, "..") == 0) {
+ run_err("error: unexpected filename: %s", cp);
+ exit(1);
+ }
+ if (targisdir) {
+ static char *namebuf = NULL;
+ static size_t cursize = 0;
+ size_t need;
+
+ need = strlen(targ) + strlen(cp) + 250;
+ if (need > cursize) {
+ if (namebuf)
+ xfree(namebuf);
+ namebuf = xmalloc(need);
+ cursize = need;
+ }
+ (void) snprintf(namebuf, need, "%s%s%s", targ,
+ strcmp(targ, "/") ? "/" : "", cp);
+ np = namebuf;
+ } else
+ np = targ;
+ curfile = cp;
+ exists = stat(np, &stb) == 0;
+ if (buf[0] == 'D') {
+ int mod_flag = pflag;
+ if (!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);
+ if (vect[0])
+ xfree(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, 4096)) == NULL) {
+ (void) close(ofd);
+ continue;
+ }
+ cp = bp->buf;
+ wrerr = NO;
+
+ statbytes = 0;
+#ifdef PROGRESS_METER
+ if (showprogress)
+ start_progress_meter(curfile, size, &statbytes);
+#endif
+ for (count = i = 0; i < size; i += 4096) {
+ amt = 4096;
+ if (i + amt > size)
+ amt = size - i;
+ count += amt;
+ do {
+ j = atomicio(read, remin, cp, amt);
+ if (j == 0) {
+ run_err("%s", j ? strerror(errno) :
+ "dropped connection");
+ exit(1);
+ }
+ amt -= j;
+ cp += j;
+ statbytes += j;
+ } while (amt > 0);
+
+ if (limit_rate)
+ bwlimit(4096);
+
+ 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;
+ }
+ }
+#ifdef PROGRESS_METER
+ if (showprogress)
+ stop_progress_meter();
+#endif
+ if (count != 0 && wrerr == NO &&
+ atomicio(vwrite, ofd, bp->buf, count) != count) {
+ wrerr = YES;
+ wrerrno = errno;
+ }
+ if (wrerr == NO && 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 (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];
+
+ 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)
+ (void) atomicio(vwrite, STDERR_FILENO, rbuf, cp - rbuf);
+ ++errs;
+ if (resp == 1)
+ return (-1);
+ exit(1);
+ }
+ /* NOTREACHED */
+}
+
+void
+usage(void)
+{
+ (void) fprintf(stderr,
+ "usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]\n"
+ " [-l limit] [-P port] [-S program]\n"
+ " [[user@]host1:]file1 [...] [[user@]host2:]file2\n");
+ exit(1);
+}
+
+void
+run_err(const char *fmt,...)
+{
+ static FILE *fp = NULL;
+ va_list ap;
+
+ ++errs;
+ if (fp == NULL && !(fp = fdopen(remout, "w")))
+ return;
+ (void) fprintf(fp, "%c", 0x01);
+ (void) fprintf(fp, "scp: ");
+ va_start(ap, fmt);
+ (void) vfprintf(fp, fmt, ap);
+ va_end(ap);
+ (void) fprintf(fp, "\n");
+ (void) fflush(fp);
+
+ if (!iamremote) {
+ va_start(ap, fmt);
+ vfprintf(stderr, fmt, ap);
+ va_end(ap);
+ fprintf(stderr, "\n");
+ }
+}
+
+void
+verifydir(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(c)) {
+ switch (c) {
+ case '\'':
+ case '"':
+ case '`':
+ case ' ':
+ case '#':
+ goto bad;
+ default:
+ break;
+ }
+ }
+ } while (*++cp);
+ return (1);
+
+bad: fprintf(stderr, "%s: invalid user name\n", cp0);
+ return (0);
+}
+
+BUF *
+allocbuf(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 = xrealloc(bp->buf, size);
+ memset(bp->buf, 0, size);
+ bp->cnt = size;
+ return (bp);
+}
+
+void
+lostconn(int signo)
+{
+ if (!iamremote)
+ write(STDERR_FILENO, "lost connection\n", 16);
+ if (signo)
+ _exit(1);
+ else
+ exit(1);
+}
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