sftp.c

   1 /* $OpenBSD: sftp.c,v 1.97 2007/10/24 03:30:02 djm Exp $ */
   2 /*
   3  * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include "includes.h"
  19
  20 #include <sys/types.h>
  21 #include <sys/ioctl.h>
  22 #ifdef HAVE_SYS_STAT_H
  23 # include <sys/stat.h>
  24 #endif
  25 #include <sys/param.h>
  26 #include <sys/socket.h>
  27 #include <sys/wait.h>
  28
  29 #include <ctype.h>
  30 #include <errno.h>
  31
  32 #ifdef HAVE_PATHS_H
  33 # include <paths.h>
  34 #endif
  35 #ifdef USE_LIBEDIT
  36 #include <histedit.h>
  37 #else
  38 typedef void EditLine;
  39 #endif
  40 #include <signal.h>
  41 #include <stdlib.h>
  42 #include <stdio.h>
  43 #include <string.h>
  44 #include <unistd.h>
  45 #include <stdarg.h>
  46
  47 #include "xmalloc.h"
  48 #include "log.h"
  49 #include "pathnames.h"
  50 #include "misc.h"
  51
  52 #include "sftp.h"
  53 #include "buffer.h"
  54 #include "sftp-common.h"
  55 #include "sftp-client.h"
  56
  57 /* File to read commands from */
  58 FILE* infile;
  59
  60 /* Are we in batchfile mode? */
  61 int batchmode = 0;
  62
  63 /* Size of buffer used when copying files */
  64 size_t copy_buffer_len = 32768;
  65
  66 /* Number of concurrent outstanding requests */
  67 size_t num_requests = 16;
  68
  69 /* PID of ssh transport process */
  70 static pid_t sshpid = -1;
  71
  72 /* This is set to 0 if the progressmeter is not desired. */
  73 int showprogress = 1;
  74
  75 /* SIGINT received during command processing */
  76 volatile sig_atomic_t interrupted = 0;
  77
  78 /* I wish qsort() took a separate ctx for the comparison function...*/
  79 int sort_flag;
  80
  81 int remote_glob(struct sftp_conn *, const char *, int,
  82     int (*)(const char *, int), glob_t *); /* proto for sftp-glob.c */
  83
  84 extern char *__progname;
  85
  86 /* Separators for interactive commands */
  87 #define WHITESPACE " \t\r\n"
  88
  89 /* ls flags */
  90 #define LS_LONG_VIEW    0x01    /* Full view ala ls -l */
  91 #define LS_SHORT_VIEW   0x02    /* Single row view ala ls -1 */
  92 #define LS_NUMERIC_VIEW 0x04    /* Long view with numeric uid/gid */
  93 #define LS_NAME_SORT    0x08    /* Sort by name (default) */
  94 #define LS_TIME_SORT    0x10    /* Sort by mtime */
  95 #define LS_SIZE_SORT    0x20    /* Sort by file size */
  96 #define LS_REVERSE_SORT 0x40    /* Reverse sort order */
  97 #define LS_SHOW_ALL     0x80    /* Don't skip filenames starting with '.' */
  98
  99 #define VIEW_FLAGS      (LS_LONG_VIEW|LS_SHORT_VIEW|LS_NUMERIC_VIEW)
 100 #define SORT_FLAGS      (LS_NAME_SORT|LS_TIME_SORT|LS_SIZE_SORT)
 101
 102 /* Commands for interactive mode */
 103 #define I_CHDIR         1
 104 #define I_CHGRP         2
 105 #define I_CHMOD         3
 106 #define I_CHOWN         4
 107 #define I_GET           5
 108 #define I_HELP          6
 109 #define I_LCHDIR        7
 110 #define I_LLS           8
 111 #define I_LMKDIR        9
 112 #define I_LPWD          10
 113 #define I_LS            11
 114 #define I_LUMASK        12
 115 #define I_MKDIR         13
 116 #define I_PUT           14
 117 #define I_PWD           15
 118 #define I_QUIT          16
 119 #define I_RENAME        17
 120 #define I_RM            18
 121 #define I_RMDIR         19
 122 #define I_SHELL         20
 123 #define I_SYMLINK       21
 124 #define I_VERSION       22
 125 #define I_PROGRESS      23
 126
 127 struct CMD {
 128         const char *c;
 129         const int n;
 130 };
 131
 132 static const struct CMD cmds[] = {
 133         { "bye",        I_QUIT },
 134         { "cd",         I_CHDIR },
 135         { "chdir",      I_CHDIR },
 136         { "chgrp",      I_CHGRP },
 137         { "chmod",      I_CHMOD },
 138         { "chown",      I_CHOWN },
 139         { "dir",        I_LS },
 140         { "exit",       I_QUIT },
 141         { "get",        I_GET },
 142         { "mget",       I_GET },
 143         { "help",       I_HELP },
 144         { "lcd",        I_LCHDIR },
 145         { "lchdir",     I_LCHDIR },
 146         { "lls",        I_LLS },
 147         { "lmkdir",     I_LMKDIR },
 148         { "ln",         I_SYMLINK },
 149         { "lpwd",       I_LPWD },
 150         { "ls",         I_LS },
 151         { "lumask",     I_LUMASK },
 152         { "mkdir",      I_MKDIR },
 153         { "progress",   I_PROGRESS },
 154         { "put",        I_PUT },
 155         { "mput",       I_PUT },
 156         { "pwd",        I_PWD },
 157         { "quit",       I_QUIT },
 158         { "rename",     I_RENAME },
 159         { "rm",         I_RM },
 160         { "rmdir",      I_RMDIR },
 161         { "symlink",    I_SYMLINK },
 162         { "version",    I_VERSION },
 163         { "!",          I_SHELL },
 164         { "?",          I_HELP },
 165         { NULL,                 -1}
 166 };
 167
 168 int interactive_loop(int fd_in, int fd_out, char *file1, char *file2);
 169
 170 /* ARGSUSED */
 171 static void
 172 killchild(int signo)
 173 {
 174         if (sshpid > 1) {
 175                 kill(sshpid, SIGTERM);
 176                 waitpid(sshpid, NULL, 0);
 177         }
 178
 179         _exit(1);
 180 }
 181
 182 /* ARGSUSED */
 183 static void
 184 cmd_interrupt(int signo)
 185 {
 186         const char msg[] = "\rInterrupt  \n";
 187         int olderrno = errno;
 188
 189         write(STDERR_FILENO, msg, sizeof(msg) - 1);
 190         interrupted = 1;
 191         errno = olderrno;
 192 }
 193
 194 static void
 195 help(void)
 196 {
 197         printf("Available commands:\n");
 198         printf("cd path                       Change remote directory to 'path'\n");
 199         printf("lcd path                      Change local directory to 'path'\n");
 200         printf("chgrp grp path                Change group of file 'path' to 'grp'\n");
 201         printf("chmod mode path               Change permissions of file 'path' to 'mode'\n");
 202         printf("chown own path                Change owner of file 'path' to 'own'\n");
 203         printf("help                          Display this help text\n");
 204         printf("get remote-path [local-path]  Download file\n");
 205         printf("lls [ls-options [path]]       Display local directory listing\n");
 206         printf("ln oldpath newpath            Symlink remote file\n");
 207         printf("lmkdir path                   Create local directory\n");
 208         printf("lpwd                          Print local working directory\n");
 209         printf("ls [path]                     Display remote directory listing\n");
 210         printf("lumask umask                  Set local umask to 'umask'\n");
 211         printf("mkdir path                    Create remote directory\n");
 212         printf("progress                      Toggle display of progress meter\n");
 213         printf("put local-path [remote-path]  Upload file\n");
 214         printf("pwd                           Display remote working directory\n");
 215         printf("exit                          Quit sftp\n");
 216         printf("quit                          Quit sftp\n");
 217         printf("rename oldpath newpath        Rename remote file\n");
 218         printf("rmdir path                    Remove remote directory\n");
 219         printf("rm path                       Delete remote file\n");
 220         printf("symlink oldpath newpath       Symlink remote file\n");
 221         printf("version                       Show SFTP version\n");
 222         printf("!command                      Execute 'command' in local shell\n");
 223         printf("!                             Escape to local shell\n");
 224         printf("?                             Synonym for help\n");
 225 }
 226
 227 static void
 228 local_do_shell(const char *args)
 229 {
 230         int status;
 231         char *shell;
 232         pid_t pid;
 233
 234         if (!*args)
 235                 args = NULL;
 236
 237         if ((shell = getenv("SHELL")) == NULL)
 238                 shell = _PATH_BSHELL;
 239
 240         if ((pid = fork()) == -1)
 241                 fatal("Couldn't fork: %s", strerror(errno));
 242
 243         if (pid == 0) {
 244                 /* XXX: child has pipe fds to ssh subproc open - issue? */
 245                 if (args) {
 246                         debug3("Executing %s -c \"%s\"", shell, args);
 247                         execl(shell, shell, "-c", args, (char *)NULL);
 248                 } else {
 249                         debug3("Executing %s", shell);
 250                         execl(shell, shell, (char *)NULL);
 251                 }
 252                 fprintf(stderr, "Couldn't execute \"%s\": %s\n", shell,
 253                     strerror(errno));
 254                 _exit(1);
 255         }
 256         while (waitpid(pid, &status, 0) == -1)
 257                 if (errno != EINTR)
 258                         fatal("Couldn't wait for child: %s", strerror(errno));
 259         if (!WIFEXITED(status))
 260                 error("Shell exited abnormally");
 261         else if (WEXITSTATUS(status))
 262                 error("Shell exited with status %d", WEXITSTATUS(status));
 263 }
 264
 265 static void
 266 local_do_ls(const char *args)
 267 {
 268         if (!args || !*args)
 269                 local_do_shell(_PATH_LS);
 270         else {
 271                 int len = strlen(_PATH_LS " ") + strlen(args) + 1;
 272                 char *buf = xmalloc(len);
 273
 274                 /* XXX: quoting - rip quoting code from ftp? */
 275                 snprintf(buf, len, _PATH_LS " %s", args);
 276                 local_do_shell(buf);
 277                 xfree(buf);
 278         }
 279 }
 280
 281 /* Strip one path (usually the pwd) from the start of another */
 282 static char *
 283 path_strip(char *path, char *strip)
 284 {
 285         size_t len;
 286
 287         if (strip == NULL)
 288                 return (xstrdup(path));
 289
 290         len = strlen(strip);
 291         if (strncmp(path, strip, len) == 0) {
 292                 if (strip[len - 1] != '/' && path[len] == '/')
 293                         len++;
 294                 return (xstrdup(path + len));
 295         }
 296
 297         return (xstrdup(path));
 298 }
 299
 300 static char *
 301 path_append(char *p1, char *p2)
 302 {
 303         char *ret;
 304         size_t len = strlen(p1) + strlen(p2) + 2;
 305
 306         ret = xmalloc(len);
 307         strlcpy(ret, p1, len);
 308         if (p1[0] != '\0' && p1[strlen(p1) - 1] != '/')
 309                 strlcat(ret, "/", len);
 310         strlcat(ret, p2, len);
 311
 312         return(ret);
 313 }
 314
 315 static char *
 316 make_absolute(char *p, char *pwd)
 317 {
 318         char *abs_str;
 319
 320         /* Derelativise */
 321         if (p && p[0] != '/') {
 322                 abs_str = path_append(pwd, p);
 323                 xfree(p);
 324                 return(abs_str);
 325         } else
 326                 return(p);
 327 }
 328
 329 static int
 330 infer_path(const char *p, char **ifp)
 331 {
 332         char *cp;
 333
 334         cp = strrchr(p, '/');
 335         if (cp == NULL) {
 336                 *ifp = xstrdup(p);
 337                 return(0);
 338         }
 339
 340         if (!cp[1]) {
 341                 error("Invalid path");
 342                 return(-1);
 343         }
 344
 345         *ifp = xstrdup(cp + 1);
 346         return(0);
 347 }
 348
 349 static int
 350 parse_getput_flags(const char *cmd, char **argv, int argc, int *pflag)
 351 {
 352         extern int optind, optreset, opterr;
 353         int ch;
 354
 355         optind = optreset = 1;
 356         opterr = 0;
 357
 358         *pflag = 0;
 359         while ((ch = getopt(argc, argv, "Pp")) != -1) {
 360                 switch (ch) {
 361                 case 'p':
 362                 case 'P':
 363                         *pflag = 1;
 364                         break;
 365                 default:
 366                         error("%s: Invalid flag -%c", cmd, ch);
 367                         return -1;
 368                 }
 369         }
 370
 371         return optind;
 372 }
 373
 374 static int
 375 parse_ls_flags(char **argv, int argc, int *lflag)
 376 {
 377         extern int optind, optreset, opterr;
 378         int ch;
 379
 380         optind = optreset = 1;
 381         opterr = 0;
 382
 383         *lflag = LS_NAME_SORT;
 384         while ((ch = getopt(argc, argv, "1Saflnrt")) != -1) {
 385                 switch (ch) {
 386                 case '1':
 387                         *lflag &= ~VIEW_FLAGS;
 388                         *lflag |= LS_SHORT_VIEW;
 389                         break;
 390                 case 'S':
 391                         *lflag &= ~SORT_FLAGS;
 392                         *lflag |= LS_SIZE_SORT;
 393                         break;
 394                 case 'a':
 395                         *lflag |= LS_SHOW_ALL;
 396                         break;
 397                 case 'f':
 398                         *lflag &= ~SORT_FLAGS;
 399                         break;
 400                 case 'l':
 401                         *lflag &= ~VIEW_FLAGS;
 402                         *lflag |= LS_LONG_VIEW;
 403                         break;
 404                 case 'n':
 405                         *lflag &= ~VIEW_FLAGS;
 406                         *lflag |= LS_NUMERIC_VIEW|LS_LONG_VIEW;
 407                         break;
 408                 case 'r':
 409                         *lflag |= LS_REVERSE_SORT;
 410                         break;
 411                 case 't':
 412                         *lflag &= ~SORT_FLAGS;
 413                         *lflag |= LS_TIME_SORT;
 414                         break;
 415                 default:
 416                         error("ls: Invalid flag -%c", ch);
 417                         return -1;
 418                 }
 419         }
 420
 421         return optind;
 422 }
 423
 424 static int
 425 is_dir(char *path)
 426 {
 427         struct stat sb;
 428
 429         /* XXX: report errors? */
 430         if (stat(path, &sb) == -1)
 431                 return(0);
 432
 433         return(S_ISDIR(sb.st_mode));
 434 }
 435
 436 static int
 437 is_reg(char *path)
 438 {
 439         struct stat sb;
 440
 441         if (stat(path, &sb) == -1)
 442                 fatal("stat %s: %s", path, strerror(errno));
 443
 444         return(S_ISREG(sb.st_mode));
 445 }
 446
 447 static int
 448 remote_is_dir(struct sftp_conn *conn, char *path)
 449 {
 450         Attrib *a;
 451
 452         /* XXX: report errors? */
 453         if ((a = do_stat(conn, path, 1)) == NULL)
 454                 return(0);
 455         if (!(a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS))
 456                 return(0);
 457         return(S_ISDIR(a->perm));
 458 }
 459
 460 static int
 461 process_get(struct sftp_conn *conn, char *src, char *dst, char *pwd, int pflag)
 462 {
 463         char *abs_src = NULL;
 464         char *abs_dst = NULL;
 465         char *tmp;
 466         glob_t g;
 467         int err = 0;
 468         int i;
 469
 470         abs_src = xstrdup(src);
 471         abs_src = make_absolute(abs_src, pwd);
 472
 473         memset(&g, 0, sizeof(g));
 474         debug3("Looking up %s", abs_src);
 475         if (remote_glob(conn, abs_src, 0, NULL, &g)) {
 476                 error("File \"%s\" not found.", abs_src);
 477                 err = -1;
 478                 goto out;
 479         }
 480
 481         /* If multiple matches, dst must be a directory or unspecified */
 482         if (g.gl_matchc > 1 && dst && !is_dir(dst)) {
 483                 error("Multiple files match, but \"%s\" is not a directory",
 484                     dst);
 485                 err = -1;
 486                 goto out;
 487         }
 488
 489         for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
 490                 if (infer_path(g.gl_pathv[i], &tmp)) {
 491                         err = -1;
 492                         goto out;
 493                 }
 494
 495                 if (g.gl_matchc == 1 && dst) {
 496                         /* If directory specified, append filename */
 497                         xfree(tmp);
 498                         if (is_dir(dst)) {
 499                                 if (infer_path(g.gl_pathv[0], &tmp)) {
 500                                         err = 1;
 501                                         goto out;
 502                                 }
 503                                 abs_dst = path_append(dst, tmp);
 504                                 xfree(tmp);
 505                         } else
 506                                 abs_dst = xstrdup(dst);
 507                 } else if (dst) {
 508                         abs_dst = path_append(dst, tmp);
 509                         xfree(tmp);
 510                 } else
 511                         abs_dst = tmp;
 512
 513                 printf("Fetching %s to %s\n", g.gl_pathv[i], abs_dst);
 514                 if (do_download(conn, g.gl_pathv[i], abs_dst, pflag) == -1)
 515                         err = -1;
 516                 xfree(abs_dst);
 517                 abs_dst = NULL;
 518         }
 519
 520 out:
 521         xfree(abs_src);
 522         globfree(&g);
 523         return(err);
 524 }
 525
 526 static int
 527 process_put(struct sftp_conn *conn, char *src, char *dst, char *pwd, int pflag)
 528 {
 529         char *tmp_dst = NULL;
 530         char *abs_dst = NULL;
 531         char *tmp;
 532         glob_t g;
 533         int err = 0;
 534         int i;
 535
 536         if (dst) {
 537                 tmp_dst = xstrdup(dst);
 538                 tmp_dst = make_absolute(tmp_dst, pwd);
 539         }
 540
 541         memset(&g, 0, sizeof(g));
 542         debug3("Looking up %s", src);
 543         if (glob(src, 0, NULL, &g)) {
 544                 error("File \"%s\" not found.", src);
 545                 err = -1;
 546                 goto out;
 547         }
 548
 549         /* If multiple matches, dst may be directory or unspecified */
 550         if (g.gl_matchc > 1 && tmp_dst && !remote_is_dir(conn, tmp_dst)) {
 551                 error("Multiple files match, but \"%s\" is not a directory",
 552                     tmp_dst);
 553                 err = -1;
 554                 goto out;
 555         }
 556
 557         for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
 558                 if (!is_reg(g.gl_pathv[i])) {
 559                         error("skipping non-regular file %s",
 560                             g.gl_pathv[i]);
 561                         continue;
 562                 }
 563                 if (infer_path(g.gl_pathv[i], &tmp)) {
 564                         err = -1;
 565                         goto out;
 566                 }
 567
 568                 if (g.gl_matchc == 1 && tmp_dst) {
 569                         /* If directory specified, append filename */
 570                         if (remote_is_dir(conn, tmp_dst)) {
 571                                 if (infer_path(g.gl_pathv[0], &tmp)) {
 572                                         err = 1;
 573                                         goto out;
 574                                 }
 575                                 abs_dst = path_append(tmp_dst, tmp);
 576                                 xfree(tmp);
 577                         } else
 578                                 abs_dst = xstrdup(tmp_dst);
 579
 580                 } else if (tmp_dst) {
 581                         abs_dst = path_append(tmp_dst, tmp);
 582                         xfree(tmp);
 583                 } else
 584                         abs_dst = make_absolute(tmp, pwd);
 585
 586                 printf("Uploading %s to %s\n", g.gl_pathv[i], abs_dst);
 587                 if (do_upload(conn, g.gl_pathv[i], abs_dst, pflag) == -1)
 588                         err = -1;
 589         }
 590
 591 out:
 592         if (abs_dst)
 593                 xfree(abs_dst);
 594         if (tmp_dst)
 595                 xfree(tmp_dst);
 596         globfree(&g);
 597         return(err);
 598 }
 599
 600 static int
 601 sdirent_comp(const void *aa, const void *bb)
 602 {
 603         SFTP_DIRENT *a = *(SFTP_DIRENT **)aa;
 604         SFTP_DIRENT *b = *(SFTP_DIRENT **)bb;
 605         int rmul = sort_flag & LS_REVERSE_SORT ? -1 : 1;
 606
 607 #define NCMP(a,b) (a == b ? 0 : (a < b ? 1 : -1))
 608         if (sort_flag & LS_NAME_SORT)
 609                 return (rmul * strcmp(a->filename, b->filename));
 610         else if (sort_flag & LS_TIME_SORT)
 611                 return (rmul * NCMP(a->a.mtime, b->a.mtime));
 612         else if (sort_flag & LS_SIZE_SORT)
 613                 return (rmul * NCMP(a->a.size, b->a.size));
 614
 615         fatal("Unknown ls sort type");
 616 }
 617
 618 /* sftp ls.1 replacement for directories */
 619 static int
 620 do_ls_dir(struct sftp_conn *conn, char *path, char *strip_path, int lflag)
 621 {
 622         int n;
 623         u_int c = 1, colspace = 0, columns = 1;
 624         SFTP_DIRENT **d;
 625
 626         if ((n = do_readdir(conn, path, &d)) != 0)
 627                 return (n);
 628
 629         if (!(lflag & LS_SHORT_VIEW)) {
 630                 u_int m = 0, width = 80;
 631                 struct winsize ws;
 632                 char *tmp;
 633
 634                 /* Count entries for sort and find longest filename */
 635                 for (n = 0; d[n] != NULL; n++) {
 636                         if (d[n]->filename[0] != '.' || (lflag & LS_SHOW_ALL))
 637                                 m = MAX(m, strlen(d[n]->filename));
 638                 }
 639
 640                 /* Add any subpath that also needs to be counted */
 641                 tmp = path_strip(path, strip_path);
 642                 m += strlen(tmp);
 643                 xfree(tmp);
 644
 645                 if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) != -1)
 646                         width = ws.ws_col;
 647
 648                 columns = width / (m + 2);
 649                 columns = MAX(columns, 1);
 650                 colspace = width / columns;
 651                 colspace = MIN(colspace, width);
 652         }
 653
 654         if (lflag & SORT_FLAGS) {
 655                 for (n = 0; d[n] != NULL; n++)
 656                         ;       /* count entries */
 657                 sort_flag = lflag & (SORT_FLAGS|LS_REVERSE_SORT);
 658                 qsort(d, n, sizeof(*d), sdirent_comp);
 659         }
 660
 661         for (n = 0; d[n] != NULL && !interrupted; n++) {
 662                 char *tmp, *fname;
 663
 664                 if (d[n]->filename[0] == '.' && !(lflag & LS_SHOW_ALL))
 665                         continue;
 666
 667                 tmp = path_append(path, d[n]->filename);
 668                 fname = path_strip(tmp, strip_path);
 669                 xfree(tmp);
 670
 671                 if (lflag & LS_LONG_VIEW) {
 672                         if (lflag & LS_NUMERIC_VIEW) {
 673                                 char *lname;
 674                                 struct stat sb;
 675
 676                                 memset(&sb, 0, sizeof(sb));
 677                                 attrib_to_stat(&d[n]->a, &sb);
 678                                 lname = ls_file(fname, &sb, 1);
 679                                 printf("%s\n", lname);
 680                                 xfree(lname);
 681                         } else
 682                                 printf("%s\n", d[n]->longname);
 683                 } else {
 684                         printf("%-*s", colspace, fname);
 685                         if (c >= columns) {
 686                                 printf("\n");
 687                                 c = 1;
 688                         } else
 689                                 c++;
 690                 }
 691
 692                 xfree(fname);
 693         }
 694
 695         if (!(lflag & LS_LONG_VIEW) && (c != 1))
 696                 printf("\n");
 697
 698         free_sftp_dirents(d);
 699         return (0);
 700 }
 701
 702 /* sftp ls.1 replacement which handles path globs */
 703 static int
 704 do_globbed_ls(struct sftp_conn *conn, char *path, char *strip_path,
 705     int lflag)
 706 {
 707         glob_t g;
 708         u_int i, c = 1, colspace = 0, columns = 1;
 709         Attrib *a = NULL;
 710
 711         memset(&g, 0, sizeof(g));
 712
 713         if (remote_glob(conn, path, GLOB_MARK|GLOB_NOCHECK|GLOB_BRACE,
 714             NULL, &g) || (g.gl_pathc && !g.gl_matchc)) {
 715                 if (g.gl_pathc)
 716                         globfree(&g);
 717                 error("Can't ls: \"%s\" not found", path);
 718                 return (-1);
 719         }
 720
 721         if (interrupted)
 722                 goto out;
 723
 724         /*
 725          * If the glob returns a single match and it is a directory,
 726          * then just list its contents.
 727          */
 728         if (g.gl_matchc == 1) {
 729                 if ((a = do_lstat(conn, g.gl_pathv[0], 1)) == NULL) {
 730                         globfree(&g);
 731                         return (-1);
 732                 }
 733                 if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
 734                     S_ISDIR(a->perm)) {
 735                         int err;
 736
 737                         err = do_ls_dir(conn, g.gl_pathv[0], strip_path, lflag);
 738                         globfree(&g);
 739                         return (err);
 740                 }
 741         }
 742
 743         if (!(lflag & LS_SHORT_VIEW)) {
 744                 u_int m = 0, width = 80;
 745                 struct winsize ws;
 746
 747                 /* Count entries for sort and find longest filename */
 748                 for (i = 0; g.gl_pathv[i]; i++)
 749                         m = MAX(m, strlen(g.gl_pathv[i]));
 750
 751                 if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) != -1)
 752                         width = ws.ws_col;
 753
 754                 columns = width / (m + 2);
 755                 columns = MAX(columns, 1);
 756                 colspace = width / columns;
 757         }
 758
 759         for (i = 0; g.gl_pathv[i] && !interrupted; i++, a = NULL) {
 760                 char *fname;
 761
 762                 fname = path_strip(g.gl_pathv[i], strip_path);
 763
 764                 if (lflag & LS_LONG_VIEW) {
 765                         char *lname;
 766                         struct stat sb;
 767
 768                         /*
 769                          * XXX: this is slow - 1 roundtrip per path
 770                          * A solution to this is to fork glob() and
 771                          * build a sftp specific version which keeps the
 772                          * attribs (which currently get thrown away)
 773                          * that the server returns as well as the filenames.
 774                          */
 775                         memset(&sb, 0, sizeof(sb));
 776                         if (a == NULL)
 777                                 a = do_lstat(conn, g.gl_pathv[i], 1);
 778                         if (a != NULL)
 779                                 attrib_to_stat(a, &sb);
 780                         lname = ls_file(fname, &sb, 1);
 781                         printf("%s\n", lname);
 782                         xfree(lname);
 783                 } else {
 784                         printf("%-*s", colspace, fname);
 785                         if (c >= columns) {
 786                                 printf("\n");
 787                                 c = 1;
 788                         } else
 789                                 c++;
 790                 }
 791                 xfree(fname);
 792         }
 793
 794         if (!(lflag & LS_LONG_VIEW) && (c != 1))
 795                 printf("\n");
 796
 797  out:
 798         if (g.gl_pathc)
 799                 globfree(&g);
 800
 801         return (0);
 802 }
 803
 804 /*
 805  * Undo escaping of glob sequences in place. Used to undo extra escaping
 806  * applied in makeargv() when the string is destined for a function that
 807  * does not glob it.
 808  */
 809 static void
 810 undo_glob_escape(char *s)
 811 {
 812         size_t i, j;
 813
 814         for (i = j = 0;;) {
 815                 if (s[i] == '\0') {
 816                         s[j] = '\0';
 817                         return;
 818                 }
 819                 if (s[i] != '\\') {
 820                         s[j++] = s[i++];
 821                         continue;
 822                 }
 823                 /* s[i] == '\\' */
 824                 ++i;
 825                 switch (s[i]) {
 826                 case '?':
 827                 case '[':
 828                 case '*':
 829                 case '\\':
 830                         s[j++] = s[i++];
 831                         break;
 832                 case '\0':
 833                         s[j++] = '\\';
 834                         s[j] = '\0';
 835                         return;
 836                 default:
 837                         s[j++] = '\\';
 838                         s[j++] = s[i++];
 839                         break;
 840                 }
 841         }
 842 }
 843
 844 /*
 845  * Split a string into an argument vector using sh(1)-style quoting,
 846  * comment and escaping rules, but with some tweaks to handle glob(3)
 847  * wildcards.
 848  * Returns NULL on error or a NULL-terminated array of arguments.
 849  */
 850 #define MAXARGS         128
 851 #define MAXARGLEN       8192
 852 static char **
 853 makeargv(const char *arg, int *argcp)
 854 {
 855         int argc, quot;
 856         size_t i, j;
 857         static char argvs[MAXARGLEN];
 858         static char *argv[MAXARGS + 1];
 859         enum { MA_START, MA_SQUOTE, MA_DQUOTE, MA_UNQUOTED } state, q;
 860
 861         *argcp = argc = 0;
 862         if (strlen(arg) > sizeof(argvs) - 1) {
 863  args_too_longs:
 864                 error("string too long");
 865                 return NULL;
 866         }
 867         state = MA_START;
 868         i = j = 0;
 869         for (;;) {
 870                 if (isspace(arg[i])) {
 871                         if (state == MA_UNQUOTED) {
 872                                 /* Terminate current argument */
 873                                 argvs[j++] = '\0';
 874                                 argc++;
 875                                 state = MA_START;
 876                         } else if (state != MA_START)
 877                                 argvs[j++] = arg[i];
 878                 } else if (arg[i] == '"' || arg[i] == '\'') {
 879                         q = arg[i] == '"' ? MA_DQUOTE : MA_SQUOTE;
 880                         if (state == MA_START) {
 881                                 argv[argc] = argvs + j;
 882                                 state = q;
 883                         } else if (state == MA_UNQUOTED)
 884                                 state = q;
 885                         else if (state == q)
 886                                 state = MA_UNQUOTED;
 887                         else
 888                                 argvs[j++] = arg[i];
 889                 } else if (arg[i] == '\\') {
 890                         if (state == MA_SQUOTE || state == MA_DQUOTE) {
 891                                 quot = state == MA_SQUOTE ? '\'' : '"';
 892                                 /* Unescape quote we are in */
 893                                 /* XXX support \n and friends? */
 894                                 if (arg[i + 1] == quot) {
 895                                         i++;
 896                                         argvs[j++] = arg[i];
 897                                 } else if (arg[i + 1] == '?' ||
 898                                     arg[i + 1] == '[' || arg[i + 1] == '*') {
 899                                         /*
 900                                          * Special case for sftp: append
 901                                          * double-escaped glob sequence -
 902                                          * glob will undo one level of
 903                                          * escaping. NB. string can grow here.
 904                                          */
 905                                         if (j >= sizeof(argvs) - 5)
 906                                                 goto args_too_longs;
 907                                         argvs[j++] = '\\';
 908                                         argvs[j++] = arg[i++];
 909                                         argvs[j++] = '\\';
 910                                         argvs[j++] = arg[i];
 911                                 } else {
 912                                         argvs[j++] = arg[i++];
 913                                         argvs[j++] = arg[i];
 914                                 }
 915                         } else {
 916                                 if (state == MA_START) {
 917                                         argv[argc] = argvs + j;
 918                                         state = MA_UNQUOTED;
 919                                 }
 920                                 if (arg[i + 1] == '?' || arg[i + 1] == '[' ||
 921                                     arg[i + 1] == '*' || arg[i + 1] == '\\') {
 922                                         /*
 923                                          * Special case for sftp: append
 924                                          * escaped glob sequence -
 925                                          * glob will undo one level of
 926                                          * escaping.
 927                                          */
 928                                         argvs[j++] = arg[i++];
 929                                         argvs[j++] = arg[i];
 930                                 } else {
 931                                         /* Unescape everything */
 932                                         /* XXX support \n and friends? */
 933                                         i++;
 934                                         argvs[j++] = arg[i];
 935                                 }
 936                         }
 937                 } else if (arg[i] == '#') {
 938                         if (state == MA_SQUOTE || state == MA_DQUOTE)
 939                                 argvs[j++] = arg[i];
 940                         else
 941                                 goto string_done;
 942                 } else if (arg[i] == '\0') {
 943                         if (state == MA_SQUOTE || state == MA_DQUOTE) {
 944                                 error("Unterminated quoted argument");
 945                                 return NULL;
 946                         }
 947  string_done:
 948                         if (state == MA_UNQUOTED) {
 949                                 argvs[j++] = '\0';
 950                                 argc++;
 951                         }
 952                         break;
 953                 } else {
 954                         if (state == MA_START) {
 955                                 argv[argc] = argvs + j;
 956                                 state = MA_UNQUOTED;
 957                         }
 958                         if ((state == MA_SQUOTE || state == MA_DQUOTE) &&
 959                             (arg[i] == '?' || arg[i] == '[' || arg[i] == '*')) {
 960                                 /*
 961                                  * Special case for sftp: escape quoted
 962                                  * glob(3) wildcards. NB. string can grow
 963                                  * here.
 964                                  */
 965                                 if (j >= sizeof(argvs) - 3)
 966                                         goto args_too_longs;
 967                                 argvs[j++] = '\\';
 968                                 argvs[j++] = arg[i];
 969                         } else
 970                                 argvs[j++] = arg[i];
 971                 }
 972                 i++;
 973         }
 974         *argcp = argc;
 975         return argv;
 976 }
 977
 978 static int
 979 parse_args(const char **cpp, int *pflag, int *lflag, int *iflag,
 980     unsigned long *n_arg, char **path1, char **path2)
 981 {
 982         const char *cmd, *cp = *cpp;
 983         char *cp2, **argv;
 984         int base = 0;
 985         long l;
 986         int i, cmdnum, optidx, argc;
 987
 988         /* Skip leading whitespace */
 989         cp = cp + strspn(cp, WHITESPACE);
 990
 991         /* Ignore blank lines and lines which begin with comment '#' char */
 992         if (*cp == '\0' || *cp == '#')
 993                 return (0);
 994
 995         /* Check for leading '-' (disable error processing) */
 996         *iflag = 0;
 997         if (*cp == '-') {
 998                 *iflag = 1;
 999                 cp++;
1000         }
1001
1002         if ((argv = makeargv(cp, &argc)) == NULL)
1003                 return -1;
1004
1005         /* Figure out which command we have */
1006         for (i = 0; cmds[i].c != NULL; i++) {
1007                 if (strcasecmp(cmds[i].c, argv[0]) == 0)
1008                         break;
1009         }
1010         cmdnum = cmds[i].n;
1011         cmd = cmds[i].c;
1012
1013         /* Special case */
1014         if (*cp == '!') {
1015                 cp++;
1016                 cmdnum = I_SHELL;
1017         } else if (cmdnum == -1) {
1018                 error("Invalid command.");
1019                 return -1;
1020         }
1021
1022         /* Get arguments and parse flags */
1023         *lflag = *pflag = *n_arg = 0;
1024         *path1 = *path2 = NULL;
1025         optidx = 1;
1026         switch (cmdnum) {
1027         case I_GET:
1028         case I_PUT:
1029                 if ((optidx = parse_getput_flags(cmd, argv, argc, pflag)) == -1)
1030                         return -1;
1031                 /* Get first pathname (mandatory) */
1032                 if (argc - optidx < 1) {
1033                         error("You must specify at least one path after a "
1034                             "%s command.", cmd);
1035                         return -1;
1036                 }
1037                 *path1 = xstrdup(argv[optidx]);
1038                 /* Get second pathname (optional) */
1039                 if (argc - optidx > 1) {
1040                         *path2 = xstrdup(argv[optidx + 1]);
1041                         /* Destination is not globbed */
1042                         undo_glob_escape(*path2);
1043                 }
1044                 break;
1045         case I_RENAME:
1046         case I_SYMLINK:
1047                 if (argc - optidx < 2) {
1048                         error("You must specify two paths after a %s "
1049                             "command.", cmd);
1050                         return -1;
1051                 }
1052                 *path1 = xstrdup(argv[optidx]);
1053                 *path2 = xstrdup(argv[optidx + 1]);
1054                 /* Paths are not globbed */
1055                 undo_glob_escape(*path1);
1056                 undo_glob_escape(*path2);
1057                 break;
1058         case I_RM:
1059         case I_MKDIR:
1060         case I_RMDIR:
1061         case I_CHDIR:
1062         case I_LCHDIR:
1063         case I_LMKDIR:
1064                 /* Get pathname (mandatory) */
1065                 if (argc - optidx < 1) {
1066                         error("You must specify a path after a %s command.",
1067                             cmd);
1068                         return -1;
1069                 }
1070                 *path1 = xstrdup(argv[optidx]);
1071                 /* Only "rm" globs */
1072                 if (cmdnum != I_RM)
1073                         undo_glob_escape(*path1);
1074                 break;
1075         case I_LS:
1076                 if ((optidx = parse_ls_flags(argv, argc, lflag)) == -1)
1077                         return(-1);
1078                 /* Path is optional */
1079                 if (argc - optidx > 0)
1080                         *path1 = xstrdup(argv[optidx]);
1081                 break;
1082         case I_LLS:
1083         case I_SHELL:
1084                 /* Uses the rest of the line */
1085                 break;
1086         case I_LUMASK:
1087         case I_CHMOD:
1088                 base = 8;
1089         case I_CHOWN:
1090         case I_CHGRP:
1091                 /* Get numeric arg (mandatory) */
1092                 if (argc - optidx < 1)
1093                         goto need_num_arg;
1094                 errno = 0;
1095                 l = strtol(argv[optidx], &cp2, base);
1096                 if (cp2 == argv[optidx] || *cp2 != '\0' ||
1097                     ((l == LONG_MIN || l == LONG_MAX) && errno == ERANGE) ||
1098                     l < 0) {
1099  need_num_arg:
1100                         error("You must supply a numeric argument "
1101                             "to the %s command.", cmd);
1102                         return -1;
1103                 }
1104                 *n_arg = l;
1105                 if (cmdnum == I_LUMASK)
1106                         break;
1107                 /* Get pathname (mandatory) */
1108                 if (argc - optidx < 2) {
1109                         error("You must specify a path after a %s command.",
1110                             cmd);
1111                         return -1;
1112                 }
1113                 *path1 = xstrdup(argv[optidx + 1]);
1114                 break;
1115         case I_QUIT:
1116         case I_PWD:
1117         case I_LPWD:
1118         case I_HELP:
1119         case I_VERSION:
1120         case I_PROGRESS:
1121                 break;
1122         default:
1123                 fatal("Command not implemented");
1124         }
1125
1126         *cpp = cp;
1127         return(cmdnum);
1128 }
1129
1130 static int
1131 parse_dispatch_command(struct sftp_conn *conn, const char *cmd, char **pwd,
1132     int err_abort)
1133 {
1134         char *path1, *path2, *tmp;
1135         int pflag, lflag, iflag, cmdnum, i;
1136         unsigned long n_arg;
1137         Attrib a, *aa;
1138         char path_buf[MAXPATHLEN];
1139         int err = 0;
1140         glob_t g;
1141
1142         path1 = path2 = NULL;
1143         cmdnum = parse_args(&cmd, &pflag, &lflag, &iflag, &n_arg,
1144             &path1, &path2);
1145
1146         if (iflag != 0)
1147                 err_abort = 0;
1148
1149         memset(&g, 0, sizeof(g));
1150
1151         /* Perform command */
1152         switch (cmdnum) {
1153         case 0:
1154                 /* Blank line */
1155                 break;
1156         case -1:
1157                 /* Unrecognized command */
1158                 err = -1;
1159                 break;
1160         case I_GET:
1161                 err = process_get(conn, path1, path2, *pwd, pflag);
1162                 break;
1163         case I_PUT:
1164                 err = process_put(conn, path1, path2, *pwd, pflag);
1165                 break;
1166         case I_RENAME:
1167                 path1 = make_absolute(path1, *pwd);
1168                 path2 = make_absolute(path2, *pwd);
1169                 err = do_rename(conn, path1, path2);
1170                 break;
1171         case I_SYMLINK:
1172                 path2 = make_absolute(path2, *pwd);
1173                 err = do_symlink(conn, path1, path2);
1174                 break;
1175         case I_RM:
1176                 path1 = make_absolute(path1, *pwd);
1177                 remote_glob(conn, path1, GLOB_NOCHECK, NULL, &g);
1178                 for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
1179                         printf("Removing %s\n", g.gl_pathv[i]);
1180                         err = do_rm(conn, g.gl_pathv[i]);
1181                         if (err != 0 && err_abort)
1182                                 break;
1183                 }
1184                 break;
1185         case I_MKDIR:
1186                 path1 = make_absolute(path1, *pwd);
1187                 attrib_clear(&a);
1188                 a.flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
1189                 a.perm = 0777;
1190                 err = do_mkdir(conn, path1, &a);
1191                 break;
1192         case I_RMDIR:
1193                 path1 = make_absolute(path1, *pwd);
1194                 err = do_rmdir(conn, path1);
1195                 break;
1196         case I_CHDIR:
1197                 path1 = make_absolute(path1, *pwd);
1198                 if ((tmp = do_realpath(conn, path1)) == NULL) {
1199                         err = 1;
1200                         break;
1201                 }
1202                 if ((aa = do_stat(conn, tmp, 0)) == NULL) {
1203                         xfree(tmp);
1204                         err = 1;
1205                         break;
1206                 }
1207                 if (!(aa->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)) {
1208                         error("Can't change directory: Can't check target");
1209                         xfree(tmp);
1210                         err = 1;
1211                         break;
1212                 }
1213                 if (!S_ISDIR(aa->perm)) {
1214                         error("Can't change directory: \"%s\" is not "
1215                             "a directory", tmp);
1216                         xfree(tmp);
1217                         err = 1;
1218                         break;
1219                 }
1220                 xfree(*pwd);
1221                 *pwd = tmp;
1222                 break;
1223         case I_LS:
1224                 if (!path1) {
1225                         do_globbed_ls(conn, *pwd, *pwd, lflag);
1226                         break;
1227                 }
1228
1229                 /* Strip pwd off beginning of non-absolute paths */
1230                 tmp = NULL;
1231                 if (*path1 != '/')
1232                         tmp = *pwd;
1233
1234                 path1 = make_absolute(path1, *pwd);
1235                 err = do_globbed_ls(conn, path1, tmp, lflag);
1236                 break;
1237         case I_LCHDIR:
1238                 if (chdir(path1) == -1) {
1239                         error("Couldn't change local directory to "
1240                             "\"%s\": %s", path1, strerror(errno));
1241                         err = 1;
1242                 }
1243                 break;
1244         case I_LMKDIR:
1245                 if (mkdir(path1, 0777) == -1) {
1246                         error("Couldn't create local directory "
1247                             "\"%s\": %s", path1, strerror(errno));
1248                         err = 1;
1249                 }
1250                 break;
1251         case I_LLS:
1252                 local_do_ls(cmd);
1253                 break;
1254         case I_SHELL:
1255                 local_do_shell(cmd);
1256                 break;
1257         case I_LUMASK:
1258                 umask(n_arg);
1259                 printf("Local umask: %03lo\n", n_arg);
1260                 break;
1261         case I_CHMOD:
1262                 path1 = make_absolute(path1, *pwd);
1263                 attrib_clear(&a);
1264                 a.flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
1265                 a.perm = n_arg;
1266                 remote_glob(conn, path1, GLOB_NOCHECK, NULL, &g);
1267                 for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
1268                         printf("Changing mode on %s\n", g.gl_pathv[i]);
1269                         err = do_setstat(conn, g.gl_pathv[i], &a);
1270                         if (err != 0 && err_abort)
1271                                 break;
1272                 }
1273                 break;
1274         case I_CHOWN:
1275         case I_CHGRP:
1276                 path1 = make_absolute(path1, *pwd);
1277                 remote_glob(conn, path1, GLOB_NOCHECK, NULL, &g);
1278                 for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
1279                         if (!(aa = do_stat(conn, g.gl_pathv[i], 0))) {
1280                                 if (err != 0 && err_abort)
1281                                         break;
1282                                 else
1283                                         continue;
1284                         }
1285                         if (!(aa->flags & SSH2_FILEXFER_ATTR_UIDGID)) {
1286                                 error("Can't get current ownership of "
1287                                     "remote file \"%s\"", g.gl_pathv[i]);
1288                                 if (err != 0 && err_abort)
1289                                         break;
1290                                 else
1291                                         continue;
1292                         }
1293                         aa->flags &= SSH2_FILEXFER_ATTR_UIDGID;
1294                         if (cmdnum == I_CHOWN) {
1295                                 printf("Changing owner on %s\n", g.gl_pathv[i]);
1296                                 aa->uid = n_arg;
1297                         } else {
1298                                 printf("Changing group on %s\n", g.gl_pathv[i]);
1299                                 aa->gid = n_arg;
1300                         }
1301                         err = do_setstat(conn, g.gl_pathv[i], aa);
1302                         if (err != 0 && err_abort)
1303                                 break;
1304                 }
1305                 break;
1306         case I_PWD:
1307                 printf("Remote working directory: %s\n", *pwd);
1308                 break;
1309         case I_LPWD:
1310                 if (!getcwd(path_buf, sizeof(path_buf))) {
1311                         error("Couldn't get local cwd: %s", strerror(errno));
1312                         err = -1;
1313                         break;
1314                 }
1315                 printf("Local working directory: %s\n", path_buf);
1316                 break;
1317         case I_QUIT:
1318                 /* Processed below */
1319                 break;
1320         case I_HELP:
1321                 help();
1322                 break;
1323         case I_VERSION:
1324                 printf("SFTP protocol version %u\n", sftp_proto_version(conn));
1325                 break;
1326         case I_PROGRESS:
1327                 showprogress = !showprogress;
1328                 if (showprogress)
1329                         printf("Progress meter enabled\n");
1330                 else
1331                         printf("Progress meter disabled\n");
1332                 break;
1333         default:
1334                 fatal("%d is not implemented", cmdnum);
1335         }
1336
1337         if (g.gl_pathc)
1338                 globfree(&g);
1339         if (path1)
1340                 xfree(path1);
1341         if (path2)
1342                 xfree(path2);
1343
1344         /* If an unignored error occurs in batch mode we should abort. */
1345         if (err_abort && err != 0)
1346                 return (-1);
1347         else if (cmdnum == I_QUIT)
1348                 return (1);
1349
1350         return (0);
1351 }
1352
1353 #ifdef USE_LIBEDIT
1354 static char *
1355 prompt(EditLine *el)
1356 {
1357         return ("sftp> ");
1358 }
1359 #endif
1360
1361 int
1362 interactive_loop(int fd_in, int fd_out, char *file1, char *file2)
1363 {
1364         char *pwd;
1365         char *dir = NULL;
1366         char cmd[2048];
1367         struct sftp_conn *conn;
1368         int err, interactive;
1369         EditLine *el = NULL;
1370 #ifdef USE_LIBEDIT
1371         History *hl = NULL;
1372         HistEvent hev;
1373         extern char *__progname;
1374
1375         if (!batchmode && isatty(STDIN_FILENO)) {
1376                 if ((el = el_init(__progname, stdin, stdout, stderr)) == NULL)
1377                         fatal("Couldn't initialise editline");
1378                 if ((hl = history_init()) == NULL)
1379                         fatal("Couldn't initialise editline history");
1380                 history(hl, &hev, H_SETSIZE, 100);
1381                 el_set(el, EL_HIST, history, hl);
1382
1383                 el_set(el, EL_PROMPT, prompt);
1384                 el_set(el, EL_EDITOR, "emacs");
1385                 el_set(el, EL_TERMINAL, NULL);
1386                 el_set(el, EL_SIGNAL, 1);
1387                 el_source(el, NULL);
1388         }
1389 #endif /* USE_LIBEDIT */
1390
1391         conn = do_init(fd_in, fd_out, copy_buffer_len, num_requests);
1392         if (conn == NULL)
1393                 fatal("Couldn't initialise connection to server");
1394
1395         pwd = do_realpath(conn, ".");
1396         if (pwd == NULL)
1397                 fatal("Need cwd");
1398
1399         if (file1 != NULL) {
1400                 dir = xstrdup(file1);
1401                 dir = make_absolute(dir, pwd);
1402
1403                 if (remote_is_dir(conn, dir) && file2 == NULL) {
1404                         printf("Changing to: %s\n", dir);
1405                         snprintf(cmd, sizeof cmd, "cd \"%s\"", dir);
1406                         if (parse_dispatch_command(conn, cmd, &pwd, 1) != 0) {
1407                                 xfree(dir);
1408                                 xfree(pwd);
1409                                 xfree(conn);
1410                                 return (-1);
1411                         }
1412                 } else {
1413                         if (file2 == NULL)
1414                                 snprintf(cmd, sizeof cmd, "get %s", dir);
1415                         else
1416                                 snprintf(cmd, sizeof cmd, "get %s %s", dir,
1417                                     file2);
1418
1419                         err = parse_dispatch_command(conn, cmd, &pwd, 1);
1420                         xfree(dir);
1421                         xfree(pwd);
1422                         xfree(conn);
1423                         return (err);
1424                 }
1425                 xfree(dir);
1426         }
1427
1428 #if defined(HAVE_SETVBUF) && !defined(BROKEN_SETVBUF)
1429         setvbuf(stdout, NULL, _IOLBF, 0);
1430         setvbuf(infile, NULL, _IOLBF, 0);
1431 #else
1432         setlinebuf(stdout);
1433         setlinebuf(infile);
1434 #endif
1435
1436         interactive = !batchmode && isatty(STDIN_FILENO);
1437         err = 0;
1438         for (;;) {
1439                 char *cp;
1440
1441                 signal(SIGINT, SIG_IGN);
1442
1443                 if (el == NULL) {
1444                         if (interactive)
1445                                 printf("sftp> ");
1446                         if (fgets(cmd, sizeof(cmd), infile) == NULL) {
1447                                 if (interactive)
1448                                         printf("\n");
1449                                 break;
1450                         }
1451                         if (!interactive) { /* Echo command */
1452                                 printf("sftp> %s", cmd);
1453                                 if (strlen(cmd) > 0 &&
1454                                     cmd[strlen(cmd) - 1] != '\n')
1455                                         printf("\n");
1456                         }
1457                 } else {
1458 #ifdef USE_LIBEDIT
1459                         const char *line;
1460                         int count = 0;
1461
1462                         if ((line = el_gets(el, &count)) == NULL || count <= 0) {
1463                                 printf("\n");
1464                                 break;
1465                         }
1466                         history(hl, &hev, H_ENTER, line);
1467                         if (strlcpy(cmd, line, sizeof(cmd)) >= sizeof(cmd)) {
1468                                 fprintf(stderr, "Error: input line too long\n");
1469                                 continue;
1470                         }
1471 #endif /* USE_LIBEDIT */
1472                 }
1473
1474                 cp = strrchr(cmd, '\n');
1475                 if (cp)
1476                         *cp = '\0';
1477
1478                 /* Handle user interrupts gracefully during commands */
1479                 interrupted = 0;
1480                 signal(SIGINT, cmd_interrupt);
1481
1482                 err = parse_dispatch_command(conn, cmd, &pwd, batchmode);
1483                 if (err != 0)
1484                         break;
1485         }
1486         xfree(pwd);
1487         xfree(conn);
1488
1489 #ifdef USE_LIBEDIT
1490         if (el != NULL)
1491                 el_end(el);
1492 #endif /* USE_LIBEDIT */
1493
1494         /* err == 1 signifies normal "quit" exit */
1495         return (err >= 0 ? 0 : -1);
1496 }
1497
1498 static void
1499 connect_to_server(char *path, char **args, int *in, int *out)
1500 {
1501         int c_in, c_out;
1502
1503 #ifdef USE_PIPES
1504         int pin[2], pout[2];
1505
1506         if ((pipe(pin) == -1) || (pipe(pout) == -1))
1507                 fatal("pipe: %s", strerror(errno));
1508         *in = pin[0];
1509         *out = pout[1];
1510         c_in = pout[0];
1511         c_out = pin[1];
1512 #else /* USE_PIPES */
1513         int inout[2];
1514
1515         if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1)
1516                 fatal("socketpair: %s", strerror(errno));
1517         *in = *out = inout[0];
1518         c_in = c_out = inout[1];
1519 #endif /* USE_PIPES */
1520
1521         if ((sshpid = fork()) == -1)
1522                 fatal("fork: %s", strerror(errno));
1523         else if (sshpid == 0) {
1524                 if ((dup2(c_in, STDIN_FILENO) == -1) ||
1525                     (dup2(c_out, STDOUT_FILENO) == -1)) {
1526                         fprintf(stderr, "dup2: %s\n", strerror(errno));
1527                         _exit(1);
1528                 }
1529                 close(*in);
1530                 close(*out);
1531                 close(c_in);
1532                 close(c_out);
1533
1534                 /*
1535                  * The underlying ssh is in the same process group, so we must
1536                  * ignore SIGINT if we want to gracefully abort commands,
1537                  * otherwise the signal will make it to the ssh process and
1538                  * kill it too
1539                  */
1540                 signal(SIGINT, SIG_IGN);
1541                 execvp(path, args);
1542                 fprintf(stderr, "exec: %s: %s\n", path, strerror(errno));
1543                 _exit(1);
1544         }
1545
1546         signal(SIGTERM, killchild);
1547         signal(SIGINT, killchild);
1548         signal(SIGHUP, killchild);
1549         close(c_in);
1550         close(c_out);
1551 }
1552
1553 static void
1554 usage(void)
1555 {
1556         extern char *__progname;
1557
1558         fprintf(stderr,
1559             "usage: %s [-1Cv] [-B buffer_size] [-b batchfile] [-F ssh_config]\n"
1560             "            [-o ssh_option] [-P sftp_server_path] [-R num_requests]\n"
1561             "            [-S program] [-s subsystem | sftp_server] host\n"
1562             "       %s [[user@]host[:file [file]]]\n"
1563             "       %s [[user@]host[:dir[/]]]\n"
1564             "       %s -b batchfile [user@]host\n", __progname, __progname, __progname, __progname);
1565         exit(1);
1566 }
1567
1568 int
1569 main(int argc, char **argv)
1570 {
1571         int in, out, ch, err;
1572         char *host, *userhost, *cp, *file2 = NULL;
1573         int debug_level = 0, sshver = 2;
1574         char *file1 = NULL, *sftp_server = NULL;
1575         char *ssh_program = _PATH_SSH_PROGRAM, *sftp_direct = NULL;
1576         LogLevel ll = SYSLOG_LEVEL_INFO;
1577         arglist args;
1578         extern int optind;
1579         extern char *optarg;
1580
1581         /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
1582         sanitise_stdfd();
1583
1584         __progname = ssh_get_progname(argv[0]);
1585         memset(&args, '\0', sizeof(args));
1586         args.list = NULL;
1587         addargs(&args, "%s", ssh_program);
1588         addargs(&args, "-oForwardX11 no");
1589         addargs(&args, "-oForwardAgent no");
1590         addargs(&args, "-oPermitLocalCommand no");
1591         addargs(&args, "-oClearAllForwardings yes");
1592
1593         ll = SYSLOG_LEVEL_INFO;
1594         infile = stdin;
1595
1596         while ((ch = getopt(argc, argv, "1hvCo:s:S:b:B:F:P:R:")) != -1) {
1597                 switch (ch) {
1598                 case 'C':
1599                         addargs(&args, "-C");
1600                         break;
1601                 case 'v':
1602                         if (debug_level < 3) {
1603                                 addargs(&args, "-v");
1604                                 ll = SYSLOG_LEVEL_DEBUG1 + debug_level;
1605                         }
1606                         debug_level++;
1607                         break;
1608                 case 'F':
1609                 case 'o':
1610                         addargs(&args, "-%c%s", ch, optarg);
1611                         break;
1612                 case '1':
1613                         sshver = 1;
1614                         if (sftp_server == NULL)
1615                                 sftp_server = _PATH_SFTP_SERVER;
1616                         break;
1617                 case 's':
1618                         sftp_server = optarg;
1619                         break;
1620                 case 'S':
1621                         ssh_program = optarg;
1622                         replacearg(&args, 0, "%s", ssh_program);
1623                         break;
1624                 case 'b':
1625                         if (batchmode)
1626                                 fatal("Batch file already specified.");
1627
1628                         /* Allow "-" as stdin */
1629                         if (strcmp(optarg, "-") != 0 &&
1630                             (infile = fopen(optarg, "r")) == NULL)
1631                                 fatal("%s (%s).", strerror(errno), optarg);
1632                         showprogress = 0;
1633                         batchmode = 1;
1634                         addargs(&args, "-obatchmode yes");
1635                         break;
1636                 case 'P':
1637                         sftp_direct = optarg;
1638                         break;
1639                 case 'B':
1640                         copy_buffer_len = strtol(optarg, &cp, 10);
1641                         if (copy_buffer_len == 0 || *cp != '\0')
1642                                 fatal("Invalid buffer size \"%s\"", optarg);
1643                         break;
1644                 case 'R':
1645                         num_requests = strtol(optarg, &cp, 10);
1646                         if (num_requests == 0 || *cp != '\0')
1647                                 fatal("Invalid number of requests \"%s\"",
1648                                     optarg);
1649                         break;
1650                 case 'h':
1651                 default:
1652                         usage();
1653                 }
1654         }
1655
1656         if (!isatty(STDERR_FILENO))
1657                 showprogress = 0;
1658
1659         log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);
1660
1661         if (sftp_direct == NULL) {
1662                 if (optind == argc || argc > (optind + 2))
1663                         usage();
1664
1665                 userhost = xstrdup(argv[optind]);
1666                 file2 = argv[optind+1];
1667
1668                 if ((host = strrchr(userhost, '@')) == NULL)
1669                         host = userhost;
1670                 else {
1671                         *host++ = '\0';
1672                         if (!userhost[0]) {
1673                                 fprintf(stderr, "Missing username\n");
1674                                 usage();
1675                         }
1676                         addargs(&args, "-l%s", userhost);
1677                 }
1678
1679                 if ((cp = colon(host)) != NULL) {
1680                         *cp++ = '\0';
1681                         file1 = cp;
1682                 }
1683
1684                 host = cleanhostname(host);
1685                 if (!*host) {
1686                         fprintf(stderr, "Missing hostname\n");
1687                         usage();
1688                 }
1689
1690                 addargs(&args, "-oProtocol %d", sshver);
1691
1692                 /* no subsystem if the server-spec contains a '/' */
1693                 if (sftp_server == NULL || strchr(sftp_server, '/') == NULL)
1694                         addargs(&args, "-s");
1695
1696                 addargs(&args, "%s", host);
1697                 addargs(&args, "%s", (sftp_server != NULL ?
1698                     sftp_server : "sftp"));
1699
1700                 if (!batchmode)
1701                         fprintf(stderr, "Connecting to %s...\n", host);
1702                 connect_to_server(ssh_program, args.list, &in, &out);
1703         } else {
1704                 args.list = NULL;
1705                 addargs(&args, "sftp-server");
1706
1707                 if (!batchmode)
1708                         fprintf(stderr, "Attaching to %s...\n", sftp_direct);
1709                 connect_to_server(sftp_direct, args.list, &in, &out);
1710         }
1711         freeargs(&args);
1712
1713         err = interactive_loop(in, out, file1, file2);
1714
1715 #if !defined(USE_PIPES)
1716         shutdown(in, SHUT_RDWR);
1717         shutdown(out, SHUT_RDWR);
1718 #endif
1719
1720         close(in);
1721         close(out);
1722         if (batchmode)
1723                 fclose(infile);
1724
1725         while (waitpid(sshpid, NULL, 0) == -1)
1726                 if (errno != EINTR)
1727                         fatal("Couldn't wait for ssh process: %s",
1728                             strerror(errno));
1729
1730         exit(err == 0 ? 0 : 1);
1731 }