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1 /* $OpenBSD: sftp.c,v 1.100 2008/04/18 12:32:11 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 #ifdef HAVE_SYS_STATVFS_H
29 #include <sys/statvfs.h>
30 #endif
31
32 #include <ctype.h>
33 #include <errno.h>
34
35 #ifdef HAVE_PATHS_H
36 # include <paths.h>
37 #endif
38 #ifdef USE_LIBEDIT
39 #include <histedit.h>
40 #else
41 typedef void EditLine;
42 #endif
43 #include <signal.h>
44 #include <stdlib.h>
45 #include <stdio.h>
46 #include <string.h>
47 #include <unistd.h>
48 #include <stdarg.h>
49
50 #ifdef HAVE_UTIL_H
51 # include <util.h>
52 #endif
53
54 #ifdef HAVE_LIBUTIL_H
55 # include <libutil.h>
56 #endif
57
58 #include "xmalloc.h"
59 #include "log.h"
60 #include "pathnames.h"
61 #include "misc.h"
62
63 #include "sftp.h"
64 #include "buffer.h"
65 #include "sftp-common.h"
66 #include "sftp-client.h"
67
68 /* File to read commands from */
69 FILE* infile;
70
71 /* Are we in batchfile mode? */
72 int batchmode = 0;
73
74 /* Size of buffer used when copying files */
75 size_t copy_buffer_len = 32768;
76
77 /* Number of concurrent outstanding requests */
78 size_t num_requests = 16;
79
80 /* PID of ssh transport process */
81 static pid_t sshpid = -1;
82
83 /* This is set to 0 if the progressmeter is not desired. */
84 int showprogress = 1;
85
86 /* SIGINT received during command processing */
87 volatile sig_atomic_t interrupted = 0;
88
89 /* I wish qsort() took a separate ctx for the comparison function...*/
90 int sort_flag;
91
92 int remote_glob(struct sftp_conn *, const char *, int,
93     int (*)(const char *, int), glob_t *); /* proto for sftp-glob.c */
94
95 extern char *__progname;
96
97 /* Separators for interactive commands */
98 #define WHITESPACE " \t\r\n"
99
100 /* ls flags */
101 #define LS_LONG_VIEW    0x01    /* Full view ala ls -l */
102 #define LS_SHORT_VIEW   0x02    /* Single row view ala ls -1 */
103 #define LS_NUMERIC_VIEW 0x04    /* Long view with numeric uid/gid */
104 #define LS_NAME_SORT    0x08    /* Sort by name (default) */
105 #define LS_TIME_SORT    0x10    /* Sort by mtime */
106 #define LS_SIZE_SORT    0x20    /* Sort by file size */
107 #define LS_REVERSE_SORT 0x40    /* Reverse sort order */
108 #define LS_SHOW_ALL     0x80    /* Don't skip filenames starting with '.' */
109
110 #define VIEW_FLAGS      (LS_LONG_VIEW|LS_SHORT_VIEW|LS_NUMERIC_VIEW)
111 #define SORT_FLAGS      (LS_NAME_SORT|LS_TIME_SORT|LS_SIZE_SORT)
112
113 /* Commands for interactive mode */
114 #define I_CHDIR         1
115 #define I_CHGRP         2
116 #define I_CHMOD         3
117 #define I_CHOWN         4
118 #define I_DF            24
119 #define I_GET           5
120 #define I_HELP          6
121 #define I_LCHDIR        7
122 #define I_LLS           8
123 #define I_LMKDIR        9
124 #define I_LPWD          10
125 #define I_LS            11
126 #define I_LUMASK        12
127 #define I_MKDIR         13
128 #define I_PUT           14
129 #define I_PWD           15
130 #define I_QUIT          16
131 #define I_RENAME        17
132 #define I_RM            18
133 #define I_RMDIR         19
134 #define I_SHELL         20
135 #define I_SYMLINK       21
136 #define I_VERSION       22
137 #define I_PROGRESS      23
138
139 struct CMD {
140         const char *c;
141         const int n;
142 };
143
144 static const struct CMD cmds[] = {
145         { "bye",        I_QUIT },
146         { "cd",         I_CHDIR },
147         { "chdir",      I_CHDIR },
148         { "chgrp",      I_CHGRP },
149         { "chmod",      I_CHMOD },
150         { "chown",      I_CHOWN },
151         { "df",         I_DF },
152         { "dir",        I_LS },
153         { "exit",       I_QUIT },
154         { "get",        I_GET },
155         { "mget",       I_GET },
156         { "help",       I_HELP },
157         { "lcd",        I_LCHDIR },
158         { "lchdir",     I_LCHDIR },
159         { "lls",        I_LLS },
160         { "lmkdir",     I_LMKDIR },
161         { "ln",         I_SYMLINK },
162         { "lpwd",       I_LPWD },
163         { "ls",         I_LS },
164         { "lumask",     I_LUMASK },
165         { "mkdir",      I_MKDIR },
166         { "progress",   I_PROGRESS },
167         { "put",        I_PUT },
168         { "mput",       I_PUT },
169         { "pwd",        I_PWD },
170         { "quit",       I_QUIT },
171         { "rename",     I_RENAME },
172         { "rm",         I_RM },
173         { "rmdir",      I_RMDIR },
174         { "symlink",    I_SYMLINK },
175         { "version",    I_VERSION },
176         { "!",          I_SHELL },
177         { "?",          I_HELP },
178         { NULL,                 -1}
179 };
180
181 int interactive_loop(int fd_in, int fd_out, char *file1, char *file2);
182
183 /* ARGSUSED */
184 static void
185 killchild(int signo)
186 {
187         if (sshpid > 1) {
188                 kill(sshpid, SIGTERM);
189                 waitpid(sshpid, NULL, 0);
190         }
191
192         _exit(1);
193 }
194
195 /* ARGSUSED */
196 static void
197 cmd_interrupt(int signo)
198 {
199         const char msg[] = "\rInterrupt  \n";
200         int olderrno = errno;
201
202         write(STDERR_FILENO, msg, sizeof(msg) - 1);
203         interrupted = 1;
204         errno = olderrno;
205 }
206
207 static void
208 help(void)
209 {
210         printf("Available commands:\n");
211         printf("cd path                       Change remote directory to 'path'\n");
212         printf("lcd path                      Change local directory to 'path'\n");
213         printf("chgrp grp path                Change group of file 'path' to 'grp'\n");
214         printf("chmod mode path               Change permissions of file 'path' to 'mode'\n");
215         printf("chown own path                Change owner of file 'path' to 'own'\n");
216         printf("df [path]                     Display statistics for current directory or\n");
217         printf("                              filesystem containing 'path'\n");
218         printf("help                          Display this help text\n");
219         printf("get remote-path [local-path]  Download file\n");
220         printf("lls [ls-options [path]]       Display local directory listing\n");
221         printf("ln oldpath newpath            Symlink remote file\n");
222         printf("lmkdir path                   Create local directory\n");
223         printf("lpwd                          Print local working directory\n");
224         printf("ls [path]                     Display remote directory listing\n");
225         printf("lumask umask                  Set local umask to 'umask'\n");
226         printf("mkdir path                    Create remote directory\n");
227         printf("progress                      Toggle display of progress meter\n");
228         printf("put local-path [remote-path]  Upload file\n");
229         printf("pwd                           Display remote working directory\n");
230         printf("exit                          Quit sftp\n");
231         printf("quit                          Quit sftp\n");
232         printf("rename oldpath newpath        Rename remote file\n");
233         printf("rmdir path                    Remove remote directory\n");
234         printf("rm path                       Delete remote file\n");
235         printf("symlink oldpath newpath       Symlink remote file\n");
236         printf("version                       Show SFTP version\n");
237         printf("!command                      Execute 'command' in local shell\n");
238         printf("!                             Escape to local shell\n");
239         printf("?                             Synonym for help\n");
240 }
241
242 static void
243 local_do_shell(const char *args)
244 {
245         int status;
246         char *shell;
247         pid_t pid;
248
249         if (!*args)
250                 args = NULL;
251
252         if ((shell = getenv("SHELL")) == NULL)
253                 shell = _PATH_BSHELL;
254
255         if ((pid = fork()) == -1)
256                 fatal("Couldn't fork: %s", strerror(errno));
257
258         if (pid == 0) {
259                 /* XXX: child has pipe fds to ssh subproc open - issue? */
260                 if (args) {
261                         debug3("Executing %s -c \"%s\"", shell, args);
262                         execl(shell, shell, "-c", args, (char *)NULL);
263                 } else {
264                         debug3("Executing %s", shell);
265                         execl(shell, shell, (char *)NULL);
266                 }
267                 fprintf(stderr, "Couldn't execute \"%s\": %s\n", shell,
268                     strerror(errno));
269                 _exit(1);
270         }
271         while (waitpid(pid, &status, 0) == -1)
272                 if (errno != EINTR)
273                         fatal("Couldn't wait for child: %s", strerror(errno));
274         if (!WIFEXITED(status))
275                 error("Shell exited abnormally");
276         else if (WEXITSTATUS(status))
277                 error("Shell exited with status %d", WEXITSTATUS(status));
278 }
279
280 static void
281 local_do_ls(const char *args)
282 {
283         if (!args || !*args)
284                 local_do_shell(_PATH_LS);
285         else {
286                 int len = strlen(_PATH_LS " ") + strlen(args) + 1;
287                 char *buf = xmalloc(len);
288
289                 /* XXX: quoting - rip quoting code from ftp? */
290                 snprintf(buf, len, _PATH_LS " %s", args);
291                 local_do_shell(buf);
292                 xfree(buf);
293         }
294 }
295
296 /* Strip one path (usually the pwd) from the start of another */
297 static char *
298 path_strip(char *path, char *strip)
299 {
300         size_t len;
301
302         if (strip == NULL)
303                 return (xstrdup(path));
304
305         len = strlen(strip);
306         if (strncmp(path, strip, len) == 0) {
307                 if (strip[len - 1] != '/' && path[len] == '/')
308                         len++;
309                 return (xstrdup(path + len));
310         }
311
312         return (xstrdup(path));
313 }
314
315 static char *
316 path_append(char *p1, char *p2)
317 {
318         char *ret;
319         size_t len = strlen(p1) + strlen(p2) + 2;
320
321         ret = xmalloc(len);
322         strlcpy(ret, p1, len);
323         if (p1[0] != '\0' && p1[strlen(p1) - 1] != '/')
324                 strlcat(ret, "/", len);
325         strlcat(ret, p2, len);
326
327         return(ret);
328 }
329
330 static char *
331 make_absolute(char *p, char *pwd)
332 {
333         char *abs_str;
334
335         /* Derelativise */
336         if (p && p[0] != '/') {
337                 abs_str = path_append(pwd, p);
338                 xfree(p);
339                 return(abs_str);
340         } else
341                 return(p);
342 }
343
344 static int
345 infer_path(const char *p, char **ifp)
346 {
347         char *cp;
348
349         cp = strrchr(p, '/');
350         if (cp == NULL) {
351                 *ifp = xstrdup(p);
352                 return(0);
353         }
354
355         if (!cp[1]) {
356                 error("Invalid path");
357                 return(-1);
358         }
359
360         *ifp = xstrdup(cp + 1);
361         return(0);
362 }
363
364 static int
365 parse_getput_flags(const char *cmd, char **argv, int argc, int *pflag)
366 {
367         extern int optind, optreset, opterr;
368         int ch;
369
370         optind = optreset = 1;
371         opterr = 0;
372
373         *pflag = 0;
374         while ((ch = getopt(argc, argv, "Pp")) != -1) {
375                 switch (ch) {
376                 case 'p':
377                 case 'P':
378                         *pflag = 1;
379                         break;
380                 default:
381                         error("%s: Invalid flag -%c", cmd, ch);
382                         return -1;
383                 }
384         }
385
386         return optind;
387 }
388
389 static int
390 parse_ls_flags(char **argv, int argc, int *lflag)
391 {
392         extern int optind, optreset, opterr;
393         int ch;
394
395         optind = optreset = 1;
396         opterr = 0;
397
398         *lflag = LS_NAME_SORT;
399         while ((ch = getopt(argc, argv, "1Saflnrt")) != -1) {
400                 switch (ch) {
401                 case '1':
402                         *lflag &= ~VIEW_FLAGS;
403                         *lflag |= LS_SHORT_VIEW;
404                         break;
405                 case 'S':
406                         *lflag &= ~SORT_FLAGS;
407                         *lflag |= LS_SIZE_SORT;
408                         break;
409                 case 'a':
410                         *lflag |= LS_SHOW_ALL;
411                         break;
412                 case 'f':
413                         *lflag &= ~SORT_FLAGS;
414                         break;
415                 case 'l':
416                         *lflag &= ~VIEW_FLAGS;
417                         *lflag |= LS_LONG_VIEW;
418                         break;
419                 case 'n':
420                         *lflag &= ~VIEW_FLAGS;
421                         *lflag |= LS_NUMERIC_VIEW|LS_LONG_VIEW;
422                         break;
423                 case 'r':
424                         *lflag |= LS_REVERSE_SORT;
425                         break;
426                 case 't':
427                         *lflag &= ~SORT_FLAGS;
428                         *lflag |= LS_TIME_SORT;
429                         break;
430                 default:
431                         error("ls: Invalid flag -%c", ch);
432                         return -1;
433                 }
434         }
435
436         return optind;
437 }
438
439 static int
440 parse_df_flags(const char *cmd, char **argv, int argc, int *hflag, int *iflag)
441 {
442         extern int optind, optreset, opterr;
443         int ch;
444
445         optind = optreset = 1;
446         opterr = 0;
447
448         *hflag = *iflag = 0;
449         while ((ch = getopt(argc, argv, "hi")) != -1) {
450                 switch (ch) {
451                 case 'h':
452                         *hflag = 1;
453                         break;
454                 case 'i':
455                         *iflag = 1;
456                         break;
457                 default:
458                         error("%s: Invalid flag -%c", cmd, ch);
459                         return -1;
460                 }
461         }
462
463         return optind;
464 }
465
466 static int
467 is_dir(char *path)
468 {
469         struct stat sb;
470
471         /* XXX: report errors? */
472         if (stat(path, &sb) == -1)
473                 return(0);
474
475         return(S_ISDIR(sb.st_mode));
476 }
477
478 static int
479 remote_is_dir(struct sftp_conn *conn, char *path)
480 {
481         Attrib *a;
482
483         /* XXX: report errors? */
484         if ((a = do_stat(conn, path, 1)) == NULL)
485                 return(0);
486         if (!(a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS))
487                 return(0);
488         return(S_ISDIR(a->perm));
489 }
490
491 static int
492 process_get(struct sftp_conn *conn, char *src, char *dst, char *pwd, int pflag)
493 {
494         char *abs_src = NULL;
495         char *abs_dst = NULL;
496         char *tmp;
497         glob_t g;
498         int err = 0;
499         int i;
500
501         abs_src = xstrdup(src);
502         abs_src = make_absolute(abs_src, pwd);
503
504         memset(&g, 0, sizeof(g));
505         debug3("Looking up %s", abs_src);
506         if (remote_glob(conn, abs_src, 0, NULL, &g)) {
507                 error("File \"%s\" not found.", abs_src);
508                 err = -1;
509                 goto out;
510         }
511
512         /* If multiple matches, dst must be a directory or unspecified */
513         if (g.gl_matchc > 1 && dst && !is_dir(dst)) {
514                 error("Multiple files match, but \"%s\" is not a directory",
515                     dst);
516                 err = -1;
517                 goto out;
518         }
519
520         for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
521                 if (infer_path(g.gl_pathv[i], &tmp)) {
522                         err = -1;
523                         goto out;
524                 }
525
526                 if (g.gl_matchc == 1 && dst) {
527                         /* If directory specified, append filename */
528                         xfree(tmp);
529                         if (is_dir(dst)) {
530                                 if (infer_path(g.gl_pathv[0], &tmp)) {
531                                         err = 1;
532                                         goto out;
533                                 }
534                                 abs_dst = path_append(dst, tmp);
535                                 xfree(tmp);
536                         } else
537                                 abs_dst = xstrdup(dst);
538                 } else if (dst) {
539                         abs_dst = path_append(dst, tmp);
540                         xfree(tmp);
541                 } else
542                         abs_dst = tmp;
543
544                 printf("Fetching %s to %s\n", g.gl_pathv[i], abs_dst);
545                 if (do_download(conn, g.gl_pathv[i], abs_dst, pflag) == -1)
546                         err = -1;
547                 xfree(abs_dst);
548                 abs_dst = NULL;
549         }
550
551 out:
552         xfree(abs_src);
553         globfree(&g);
554         return(err);
555 }
556
557 static int
558 process_put(struct sftp_conn *conn, char *src, char *dst, char *pwd, int pflag)
559 {
560         char *tmp_dst = NULL;
561         char *abs_dst = NULL;
562         char *tmp;
563         glob_t g;
564         int err = 0;
565         int i;
566         struct stat sb;
567
568         if (dst) {
569                 tmp_dst = xstrdup(dst);
570                 tmp_dst = make_absolute(tmp_dst, pwd);
571         }
572
573         memset(&g, 0, sizeof(g));
574         debug3("Looking up %s", src);
575         if (glob(src, GLOB_NOCHECK, NULL, &g)) {
576                 error("File \"%s\" not found.", src);
577                 err = -1;
578                 goto out;
579         }
580
581         /* If multiple matches, dst may be directory or unspecified */
582         if (g.gl_matchc > 1 && tmp_dst && !remote_is_dir(conn, tmp_dst)) {
583                 error("Multiple files match, but \"%s\" is not a directory",
584                     tmp_dst);
585                 err = -1;
586                 goto out;
587         }
588
589         for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
590                 if (stat(g.gl_pathv[i], &sb) == -1) {
591                         err = -1;
592                         error("stat %s: %s", g.gl_pathv[i], strerror(errno));
593                         continue;
594                 }
595
596                 if (!S_ISREG(sb.st_mode)) {
597                         error("skipping non-regular file %s",
598                             g.gl_pathv[i]);
599                         continue;
600                 }
601                 if (infer_path(g.gl_pathv[i], &tmp)) {
602                         err = -1;
603                         goto out;
604                 }
605
606                 if (g.gl_matchc == 1 && tmp_dst) {
607                         /* If directory specified, append filename */
608                         if (remote_is_dir(conn, tmp_dst)) {
609                                 if (infer_path(g.gl_pathv[0], &tmp)) {
610                                         err = 1;
611                                         goto out;
612                                 }
613                                 abs_dst = path_append(tmp_dst, tmp);
614                                 xfree(tmp);
615                         } else
616                                 abs_dst = xstrdup(tmp_dst);
617
618                 } else if (tmp_dst) {
619                         abs_dst = path_append(tmp_dst, tmp);
620                         xfree(tmp);
621                 } else
622                         abs_dst = make_absolute(tmp, pwd);
623
624                 printf("Uploading %s to %s\n", g.gl_pathv[i], abs_dst);
625                 if (do_upload(conn, g.gl_pathv[i], abs_dst, pflag) == -1)
626                         err = -1;
627         }
628
629 out:
630         if (abs_dst)
631                 xfree(abs_dst);
632         if (tmp_dst)
633                 xfree(tmp_dst);
634         globfree(&g);
635         return(err);
636 }
637
638 static int
639 sdirent_comp(const void *aa, const void *bb)
640 {
641         SFTP_DIRENT *a = *(SFTP_DIRENT **)aa;
642         SFTP_DIRENT *b = *(SFTP_DIRENT **)bb;
643         int rmul = sort_flag & LS_REVERSE_SORT ? -1 : 1;
644
645 #define NCMP(a,b) (a == b ? 0 : (a < b ? 1 : -1))
646         if (sort_flag & LS_NAME_SORT)
647                 return (rmul * strcmp(a->filename, b->filename));
648         else if (sort_flag & LS_TIME_SORT)
649                 return (rmul * NCMP(a->a.mtime, b->a.mtime));
650         else if (sort_flag & LS_SIZE_SORT)
651                 return (rmul * NCMP(a->a.size, b->a.size));
652
653         fatal("Unknown ls sort type");
654 }
655
656 /* sftp ls.1 replacement for directories */
657 static int
658 do_ls_dir(struct sftp_conn *conn, char *path, char *strip_path, int lflag)
659 {
660         int n;
661         u_int c = 1, colspace = 0, columns = 1;
662         SFTP_DIRENT **d;
663
664         if ((n = do_readdir(conn, path, &d)) != 0)
665                 return (n);
666
667         if (!(lflag & LS_SHORT_VIEW)) {
668                 u_int m = 0, width = 80;
669                 struct winsize ws;
670                 char *tmp;
671
672                 /* Count entries for sort and find longest filename */
673                 for (n = 0; d[n] != NULL; n++) {
674                         if (d[n]->filename[0] != '.' || (lflag & LS_SHOW_ALL))
675                                 m = MAX(m, strlen(d[n]->filename));
676                 }
677
678                 /* Add any subpath that also needs to be counted */
679                 tmp = path_strip(path, strip_path);
680                 m += strlen(tmp);
681                 xfree(tmp);
682
683                 if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) != -1)
684                         width = ws.ws_col;
685
686                 columns = width / (m + 2);
687                 columns = MAX(columns, 1);
688                 colspace = width / columns;
689                 colspace = MIN(colspace, width);
690         }
691
692         if (lflag & SORT_FLAGS) {
693                 for (n = 0; d[n] != NULL; n++)
694                         ;       /* count entries */
695                 sort_flag = lflag & (SORT_FLAGS|LS_REVERSE_SORT);
696                 qsort(d, n, sizeof(*d), sdirent_comp);
697         }
698
699         for (n = 0; d[n] != NULL && !interrupted; n++) {
700                 char *tmp, *fname;
701
702                 if (d[n]->filename[0] == '.' && !(lflag & LS_SHOW_ALL))
703                         continue;
704
705                 tmp = path_append(path, d[n]->filename);
706                 fname = path_strip(tmp, strip_path);
707                 xfree(tmp);
708
709                 if (lflag & LS_LONG_VIEW) {
710                         if (lflag & LS_NUMERIC_VIEW) {
711                                 char *lname;
712                                 struct stat sb;
713
714                                 memset(&sb, 0, sizeof(sb));
715                                 attrib_to_stat(&d[n]->a, &sb);
716                                 lname = ls_file(fname, &sb, 1);
717                                 printf("%s\n", lname);
718                                 xfree(lname);
719                         } else
720                                 printf("%s\n", d[n]->longname);
721                 } else {
722                         printf("%-*s", colspace, fname);
723                         if (c >= columns) {
724                                 printf("\n");
725                                 c = 1;
726                         } else
727                                 c++;
728                 }
729
730                 xfree(fname);
731         }
732
733         if (!(lflag & LS_LONG_VIEW) && (c != 1))
734                 printf("\n");
735
736         free_sftp_dirents(d);
737         return (0);
738 }
739
740 /* sftp ls.1 replacement which handles path globs */
741 static int
742 do_globbed_ls(struct sftp_conn *conn, char *path, char *strip_path,
743     int lflag)
744 {
745         glob_t g;
746         u_int i, c = 1, colspace = 0, columns = 1;
747         Attrib *a = NULL;
748
749         memset(&g, 0, sizeof(g));
750
751         if (remote_glob(conn, path, GLOB_MARK|GLOB_NOCHECK|GLOB_BRACE,
752             NULL, &g) || (g.gl_pathc && !g.gl_matchc)) {
753                 if (g.gl_pathc)
754                         globfree(&g);
755                 error("Can't ls: \"%s\" not found", path);
756                 return (-1);
757         }
758
759         if (interrupted)
760                 goto out;
761
762         /*
763          * If the glob returns a single match and it is a directory,
764          * then just list its contents.
765          */
766         if (g.gl_matchc == 1) {
767                 if ((a = do_lstat(conn, g.gl_pathv[0], 1)) == NULL) {
768                         globfree(&g);
769                         return (-1);
770                 }
771                 if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
772                     S_ISDIR(a->perm)) {
773                         int err;
774
775                         err = do_ls_dir(conn, g.gl_pathv[0], strip_path, lflag);
776                         globfree(&g);
777                         return (err);
778                 }
779         }
780
781         if (!(lflag & LS_SHORT_VIEW)) {
782                 u_int m = 0, width = 80;
783                 struct winsize ws;
784
785                 /* Count entries for sort and find longest filename */
786                 for (i = 0; g.gl_pathv[i]; i++)
787                         m = MAX(m, strlen(g.gl_pathv[i]));
788
789                 if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) != -1)
790                         width = ws.ws_col;
791
792                 columns = width / (m + 2);
793                 columns = MAX(columns, 1);
794                 colspace = width / columns;
795         }
796
797         for (i = 0; g.gl_pathv[i] && !interrupted; i++, a = NULL) {
798                 char *fname;
799
800                 fname = path_strip(g.gl_pathv[i], strip_path);
801
802                 if (lflag & LS_LONG_VIEW) {
803                         char *lname;
804                         struct stat sb;
805
806                         /*
807                          * XXX: this is slow - 1 roundtrip per path
808                          * A solution to this is to fork glob() and
809                          * build a sftp specific version which keeps the
810                          * attribs (which currently get thrown away)
811                          * that the server returns as well as the filenames.
812                          */
813                         memset(&sb, 0, sizeof(sb));
814                         if (a == NULL)
815                                 a = do_lstat(conn, g.gl_pathv[i], 1);
816                         if (a != NULL)
817                                 attrib_to_stat(a, &sb);
818                         lname = ls_file(fname, &sb, 1);
819                         printf("%s\n", lname);
820                         xfree(lname);
821                 } else {
822                         printf("%-*s", colspace, fname);
823                         if (c >= columns) {
824                                 printf("\n");
825                                 c = 1;
826                         } else
827                                 c++;
828                 }
829                 xfree(fname);
830         }
831
832         if (!(lflag & LS_LONG_VIEW) && (c != 1))
833                 printf("\n");
834
835  out:
836         if (g.gl_pathc)
837                 globfree(&g);
838
839         return (0);
840 }
841
842 static int
843 do_df(struct sftp_conn *conn, char *path, int hflag, int iflag)
844 {
845 #ifdef USE_STATVFS
846         struct statvfs st;
847         char s_used[FMT_SCALED_STRSIZE];
848         char s_avail[FMT_SCALED_STRSIZE];
849         char s_root[FMT_SCALED_STRSIZE];
850         char s_total[FMT_SCALED_STRSIZE];
851
852         if (do_statvfs(conn, path, &st, 1) == -1)
853                 return -1;
854         if (iflag) {
855                 printf("     Inodes        Used       Avail      "
856                     "(root)    %%Capacity\n");
857                 printf("%11llu %11llu %11llu %11llu         %3llu%%\n",
858                     (unsigned long long)st.f_files,
859                     (unsigned long long)(st.f_files - st.f_ffree),
860                     (unsigned long long)st.f_favail,
861                     (unsigned long long)st.f_ffree,
862                     (unsigned long long)(100 * (st.f_files - st.f_ffree) /
863                     st.f_files));
864         } else if (hflag) {
865                 strlcpy(s_used, "error", sizeof(s_used));
866                 strlcpy(s_avail, "error", sizeof(s_avail));
867                 strlcpy(s_root, "error", sizeof(s_root));
868                 strlcpy(s_total, "error", sizeof(s_total));
869                 fmt_scaled((st.f_blocks - st.f_bfree) * st.f_frsize, s_used);
870                 fmt_scaled(st.f_bavail * st.f_frsize, s_avail);
871                 fmt_scaled(st.f_bfree * st.f_frsize, s_root);
872                 fmt_scaled(st.f_blocks * st.f_frsize, s_total);
873                 printf("    Size     Used    Avail   (root)    %%Capacity\n");
874                 printf("%7sB %7sB %7sB %7sB         %3llu%%\n",
875                     s_total, s_used, s_avail, s_root,
876                     (unsigned long long)(100 * (st.f_blocks - st.f_bfree) /
877                     st.f_blocks));
878         } else {
879                 printf("        Size         Used        Avail       "
880                     "(root)    %%Capacity\n");
881                 printf("%12llu %12llu %12llu %12llu         %3llu%%\n",
882                     (unsigned long long)(st.f_frsize * st.f_blocks / 1024),
883                     (unsigned long long)(st.f_frsize *
884                     (st.f_blocks - st.f_bfree) / 1024),
885                     (unsigned long long)(st.f_frsize * st.f_bavail / 1024),
886                     (unsigned long long)(st.f_frsize * st.f_bfree / 1024),
887                     (unsigned long long)(100 * (st.f_blocks - st.f_bfree) /
888                     st.f_blocks));
889         }
890         return 0;
891 #else
892         error("client does not support statvfs extension");
893         return -1;
894 #endif
895 }
896
897 /*
898  * Undo escaping of glob sequences in place. Used to undo extra escaping
899  * applied in makeargv() when the string is destined for a function that
900  * does not glob it.
901  */
902 static void
903 undo_glob_escape(char *s)
904 {
905         size_t i, j;
906
907         for (i = j = 0;;) {
908                 if (s[i] == '\0') {
909                         s[j] = '\0';
910                         return;
911                 }
912                 if (s[i] != '\\') {
913                         s[j++] = s[i++];
914                         continue;
915                 }
916                 /* s[i] == '\\' */
917                 ++i;
918                 switch (s[i]) {
919                 case '?':
920                 case '[':
921                 case '*':
922                 case '\\':
923                         s[j++] = s[i++];
924                         break;
925                 case '\0':
926                         s[j++] = '\\';
927                         s[j] = '\0';
928                         return;
929                 default:
930                         s[j++] = '\\';
931                         s[j++] = s[i++];
932                         break;
933                 }
934         }
935 }
936
937 /*
938  * Split a string into an argument vector using sh(1)-style quoting,
939  * comment and escaping rules, but with some tweaks to handle glob(3)
940  * wildcards.
941  * Returns NULL on error or a NULL-terminated array of arguments.
942  */
943 #define MAXARGS         128
944 #define MAXARGLEN       8192
945 static char **
946 makeargv(const char *arg, int *argcp)
947 {
948         int argc, quot;
949         size_t i, j;
950         static char argvs[MAXARGLEN];
951         static char *argv[MAXARGS + 1];
952         enum { MA_START, MA_SQUOTE, MA_DQUOTE, MA_UNQUOTED } state, q;
953
954         *argcp = argc = 0;
955         if (strlen(arg) > sizeof(argvs) - 1) {
956  args_too_longs:
957                 error("string too long");
958                 return NULL;
959         }
960         state = MA_START;
961         i = j = 0;
962         for (;;) {
963                 if (isspace(arg[i])) {
964                         if (state == MA_UNQUOTED) {
965                                 /* Terminate current argument */
966                                 argvs[j++] = '\0';
967                                 argc++;
968                                 state = MA_START;
969                         } else if (state != MA_START)
970                                 argvs[j++] = arg[i];
971                 } else if (arg[i] == '"' || arg[i] == '\'') {
972                         q = arg[i] == '"' ? MA_DQUOTE : MA_SQUOTE;
973                         if (state == MA_START) {
974                                 argv[argc] = argvs + j;
975                                 state = q;
976                         } else if (state == MA_UNQUOTED) 
977                                 state = q;
978                         else if (state == q)
979                                 state = MA_UNQUOTED;
980                         else
981                                 argvs[j++] = arg[i];
982                 } else if (arg[i] == '\\') {
983                         if (state == MA_SQUOTE || state == MA_DQUOTE) {
984                                 quot = state == MA_SQUOTE ? '\'' : '"';
985                                 /* Unescape quote we are in */
986                                 /* XXX support \n and friends? */
987                                 if (arg[i + 1] == quot) {
988                                         i++;
989                                         argvs[j++] = arg[i];
990                                 } else if (arg[i + 1] == '?' ||
991                                     arg[i + 1] == '[' || arg[i + 1] == '*') {
992                                         /*
993                                          * Special case for sftp: append
994                                          * double-escaped glob sequence -
995                                          * glob will undo one level of
996                                          * escaping. NB. string can grow here.
997                                          */
998                                         if (j >= sizeof(argvs) - 5)
999                                                 goto args_too_longs;
1000                                         argvs[j++] = '\\';
1001                                         argvs[j++] = arg[i++];
1002                                         argvs[j++] = '\\';
1003                                         argvs[j++] = arg[i];
1004                                 } else {
1005                                         argvs[j++] = arg[i++];
1006                                         argvs[j++] = arg[i];
1007                                 }
1008                         } else {
1009                                 if (state == MA_START) {
1010                                         argv[argc] = argvs + j;
1011                                         state = MA_UNQUOTED;
1012                                 }
1013                                 if (arg[i + 1] == '?' || arg[i + 1] == '[' ||
1014                                     arg[i + 1] == '*' || arg[i + 1] == '\\') {
1015                                         /*
1016                                          * Special case for sftp: append
1017                                          * escaped glob sequence -
1018                                          * glob will undo one level of
1019                                          * escaping.
1020                                          */
1021                                         argvs[j++] = arg[i++];
1022                                         argvs[j++] = arg[i];
1023                                 } else {
1024                                         /* Unescape everything */
1025                                         /* XXX support \n and friends? */
1026                                         i++;
1027                                         argvs[j++] = arg[i];
1028                                 }
1029                         }
1030                 } else if (arg[i] == '#') {
1031                         if (state == MA_SQUOTE || state == MA_DQUOTE)
1032                                 argvs[j++] = arg[i];
1033                         else
1034                                 goto string_done;
1035                 } else if (arg[i] == '\0') {
1036                         if (state == MA_SQUOTE || state == MA_DQUOTE) {
1037                                 error("Unterminated quoted argument");
1038                                 return NULL;
1039                         }
1040  string_done:
1041                         if (state == MA_UNQUOTED) {
1042                                 argvs[j++] = '\0';
1043                                 argc++;
1044                         }
1045                         break;
1046                 } else {
1047                         if (state == MA_START) {
1048                                 argv[argc] = argvs + j;
1049                                 state = MA_UNQUOTED;
1050                         }
1051                         if ((state == MA_SQUOTE || state == MA_DQUOTE) &&
1052                             (arg[i] == '?' || arg[i] == '[' || arg[i] == '*')) {
1053                                 /*
1054                                  * Special case for sftp: escape quoted
1055                                  * glob(3) wildcards. NB. string can grow
1056                                  * here.
1057                                  */
1058                                 if (j >= sizeof(argvs) - 3)
1059                                         goto args_too_longs;
1060                                 argvs[j++] = '\\';
1061                                 argvs[j++] = arg[i];
1062                         } else
1063                                 argvs[j++] = arg[i];
1064                 }
1065                 i++;
1066         }
1067         *argcp = argc;
1068         return argv;
1069 }
1070
1071 static int
1072 parse_args(const char **cpp, int *pflag, int *lflag, int *iflag, int *hflag,
1073     unsigned long *n_arg, char **path1, char **path2)
1074 {
1075         const char *cmd, *cp = *cpp;
1076         char *cp2, **argv;
1077         int base = 0;
1078         long l;
1079         int i, cmdnum, optidx, argc;
1080
1081         /* Skip leading whitespace */
1082         cp = cp + strspn(cp, WHITESPACE);
1083
1084         /* Ignore blank lines and lines which begin with comment '#' char */
1085         if (*cp == '\0' || *cp == '#')
1086                 return (0);
1087
1088         /* Check for leading '-' (disable error processing) */
1089         *iflag = 0;
1090         if (*cp == '-') {
1091                 *iflag = 1;
1092                 cp++;
1093         }
1094
1095         if ((argv = makeargv(cp, &argc)) == NULL)
1096                 return -1;
1097
1098         /* Figure out which command we have */
1099         for (i = 0; cmds[i].c != NULL; i++) {
1100                 if (strcasecmp(cmds[i].c, argv[0]) == 0)
1101                         break;
1102         }
1103         cmdnum = cmds[i].n;
1104         cmd = cmds[i].c;
1105
1106         /* Special case */
1107         if (*cp == '!') {
1108                 cp++;
1109                 cmdnum = I_SHELL;
1110         } else if (cmdnum == -1) {
1111                 error("Invalid command.");
1112                 return -1;
1113         }
1114
1115         /* Get arguments and parse flags */
1116         *lflag = *pflag = *hflag = *n_arg = 0;
1117         *path1 = *path2 = NULL;
1118         optidx = 1;
1119         switch (cmdnum) {
1120         case I_GET:
1121         case I_PUT:
1122                 if ((optidx = parse_getput_flags(cmd, argv, argc, pflag)) == -1)
1123                         return -1;
1124                 /* Get first pathname (mandatory) */
1125                 if (argc - optidx < 1) {
1126                         error("You must specify at least one path after a "
1127                             "%s command.", cmd);
1128                         return -1;
1129                 }
1130                 *path1 = xstrdup(argv[optidx]);
1131                 /* Get second pathname (optional) */
1132                 if (argc - optidx > 1) {
1133                         *path2 = xstrdup(argv[optidx + 1]);
1134                         /* Destination is not globbed */
1135                         undo_glob_escape(*path2);
1136                 }
1137                 break;
1138         case I_RENAME:
1139         case I_SYMLINK:
1140                 if (argc - optidx < 2) {
1141                         error("You must specify two paths after a %s "
1142                             "command.", cmd);
1143                         return -1;
1144                 }
1145                 *path1 = xstrdup(argv[optidx]);
1146                 *path2 = xstrdup(argv[optidx + 1]);
1147                 /* Paths are not globbed */
1148                 undo_glob_escape(*path1);
1149                 undo_glob_escape(*path2);
1150                 break;
1151         case I_RM:
1152         case I_MKDIR:
1153         case I_RMDIR:
1154         case I_CHDIR:
1155         case I_LCHDIR:
1156         case I_LMKDIR:
1157                 /* Get pathname (mandatory) */
1158                 if (argc - optidx < 1) {
1159                         error("You must specify a path after a %s command.",
1160                             cmd);
1161                         return -1;
1162                 }
1163                 *path1 = xstrdup(argv[optidx]);
1164                 /* Only "rm" globs */
1165                 if (cmdnum != I_RM)
1166                         undo_glob_escape(*path1);
1167                 break;
1168         case I_DF:
1169                 if ((optidx = parse_df_flags(cmd, argv, argc, hflag,
1170                     iflag)) == -1)
1171                         return -1;
1172                 /* Default to current directory if no path specified */
1173                 if (argc - optidx < 1)
1174                         *path1 = NULL;
1175                 else {
1176                         *path1 = xstrdup(argv[optidx]);
1177                         undo_glob_escape(*path1);
1178                 }
1179                 break;
1180         case I_LS:
1181                 if ((optidx = parse_ls_flags(argv, argc, lflag)) == -1)
1182                         return(-1);
1183                 /* Path is optional */
1184                 if (argc - optidx > 0)
1185                         *path1 = xstrdup(argv[optidx]);
1186                 break;
1187         case I_LLS:
1188                 /* Skip ls command and following whitespace */
1189                 cp = cp + strlen(cmd) + strspn(cp, WHITESPACE);
1190         case I_SHELL:
1191                 /* Uses the rest of the line */
1192                 break;
1193         case I_LUMASK:
1194         case I_CHMOD:
1195                 base = 8;
1196         case I_CHOWN:
1197         case I_CHGRP:
1198                 /* Get numeric arg (mandatory) */
1199                 if (argc - optidx < 1)
1200                         goto need_num_arg;
1201                 errno = 0;
1202                 l = strtol(argv[optidx], &cp2, base);
1203                 if (cp2 == argv[optidx] || *cp2 != '\0' ||
1204                     ((l == LONG_MIN || l == LONG_MAX) && errno == ERANGE) ||
1205                     l < 0) {
1206  need_num_arg:
1207                         error("You must supply a numeric argument "
1208                             "to the %s command.", cmd);
1209                         return -1;
1210                 }
1211                 *n_arg = l;
1212                 if (cmdnum == I_LUMASK)
1213                         break;
1214                 /* Get pathname (mandatory) */
1215                 if (argc - optidx < 2) {
1216                         error("You must specify a path after a %s command.",
1217                             cmd);
1218                         return -1;
1219                 }
1220                 *path1 = xstrdup(argv[optidx + 1]);
1221                 break;
1222         case I_QUIT:
1223         case I_PWD:
1224         case I_LPWD:
1225         case I_HELP:
1226         case I_VERSION:
1227         case I_PROGRESS:
1228                 break;
1229         default:
1230                 fatal("Command not implemented");
1231         }
1232
1233         *cpp = cp;
1234         return(cmdnum);
1235 }
1236
1237 static int
1238 parse_dispatch_command(struct sftp_conn *conn, const char *cmd, char **pwd,
1239     int err_abort)
1240 {
1241         char *path1, *path2, *tmp;
1242         int pflag, lflag, iflag, hflag, cmdnum, i;
1243         unsigned long n_arg;
1244         Attrib a, *aa;
1245         char path_buf[MAXPATHLEN];
1246         int err = 0;
1247         glob_t g;
1248
1249         path1 = path2 = NULL;
1250         cmdnum = parse_args(&cmd, &pflag, &lflag, &iflag, &hflag, &n_arg,
1251             &path1, &path2);
1252
1253         if (iflag != 0)
1254                 err_abort = 0;
1255
1256         memset(&g, 0, sizeof(g));
1257
1258         /* Perform command */
1259         switch (cmdnum) {
1260         case 0:
1261                 /* Blank line */
1262                 break;
1263         case -1:
1264                 /* Unrecognized command */
1265                 err = -1;
1266                 break;
1267         case I_GET:
1268                 err = process_get(conn, path1, path2, *pwd, pflag);
1269                 break;
1270         case I_PUT:
1271                 err = process_put(conn, path1, path2, *pwd, pflag);
1272                 break;
1273         case I_RENAME:
1274                 path1 = make_absolute(path1, *pwd);
1275                 path2 = make_absolute(path2, *pwd);
1276                 err = do_rename(conn, path1, path2);
1277                 break;
1278         case I_SYMLINK:
1279                 path2 = make_absolute(path2, *pwd);
1280                 err = do_symlink(conn, path1, path2);
1281                 break;
1282         case I_RM:
1283                 path1 = make_absolute(path1, *pwd);
1284                 remote_glob(conn, path1, GLOB_NOCHECK, NULL, &g);
1285                 for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
1286                         printf("Removing %s\n", g.gl_pathv[i]);
1287                         err = do_rm(conn, g.gl_pathv[i]);
1288                         if (err != 0 && err_abort)
1289                                 break;
1290                 }
1291                 break;
1292         case I_MKDIR:
1293                 path1 = make_absolute(path1, *pwd);
1294                 attrib_clear(&a);
1295                 a.flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
1296                 a.perm = 0777;
1297                 err = do_mkdir(conn, path1, &a);
1298                 break;
1299         case I_RMDIR:
1300                 path1 = make_absolute(path1, *pwd);
1301                 err = do_rmdir(conn, path1);
1302                 break;
1303         case I_CHDIR:
1304                 path1 = make_absolute(path1, *pwd);
1305                 if ((tmp = do_realpath(conn, path1)) == NULL) {
1306                         err = 1;
1307                         break;
1308                 }
1309                 if ((aa = do_stat(conn, tmp, 0)) == NULL) {
1310                         xfree(tmp);
1311                         err = 1;
1312                         break;
1313                 }
1314                 if (!(aa->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)) {
1315                         error("Can't change directory: Can't check target");
1316                         xfree(tmp);
1317                         err = 1;
1318                         break;
1319                 }
1320                 if (!S_ISDIR(aa->perm)) {
1321                         error("Can't change directory: \"%s\" is not "
1322                             "a directory", tmp);
1323                         xfree(tmp);
1324                         err = 1;
1325                         break;
1326                 }
1327                 xfree(*pwd);
1328                 *pwd = tmp;
1329                 break;
1330         case I_LS:
1331                 if (!path1) {
1332                         do_globbed_ls(conn, *pwd, *pwd, lflag);
1333                         break;
1334                 }
1335
1336                 /* Strip pwd off beginning of non-absolute paths */
1337                 tmp = NULL;
1338                 if (*path1 != '/')
1339                         tmp = *pwd;
1340
1341                 path1 = make_absolute(path1, *pwd);
1342                 err = do_globbed_ls(conn, path1, tmp, lflag);
1343                 break;
1344         case I_DF:
1345                 /* Default to current directory if no path specified */
1346                 if (path1 == NULL)
1347                         path1 = xstrdup(*pwd);
1348                 path1 = make_absolute(path1, *pwd);
1349                 err = do_df(conn, path1, hflag, iflag);
1350                 break;
1351         case I_LCHDIR:
1352                 if (chdir(path1) == -1) {
1353                         error("Couldn't change local directory to "
1354                             "\"%s\": %s", path1, strerror(errno));
1355                         err = 1;
1356                 }
1357                 break;
1358         case I_LMKDIR:
1359                 if (mkdir(path1, 0777) == -1) {
1360                         error("Couldn't create local directory "
1361                             "\"%s\": %s", path1, strerror(errno));
1362                         err = 1;
1363                 }
1364                 break;
1365         case I_LLS:
1366                 local_do_ls(cmd);
1367                 break;
1368         case I_SHELL:
1369                 local_do_shell(cmd);
1370                 break;
1371         case I_LUMASK:
1372                 umask(n_arg);
1373                 printf("Local umask: %03lo\n", n_arg);
1374                 break;
1375         case I_CHMOD:
1376                 path1 = make_absolute(path1, *pwd);
1377                 attrib_clear(&a);
1378                 a.flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
1379                 a.perm = n_arg;
1380                 remote_glob(conn, path1, GLOB_NOCHECK, NULL, &g);
1381                 for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
1382                         printf("Changing mode on %s\n", g.gl_pathv[i]);
1383                         err = do_setstat(conn, g.gl_pathv[i], &a);
1384                         if (err != 0 && err_abort)
1385                                 break;
1386                 }
1387                 break;
1388         case I_CHOWN:
1389         case I_CHGRP:
1390                 path1 = make_absolute(path1, *pwd);
1391                 remote_glob(conn, path1, GLOB_NOCHECK, NULL, &g);
1392                 for (i = 0; g.gl_pathv[i] && !interrupted; i++) {
1393                         if (!(aa = do_stat(conn, g.gl_pathv[i], 0))) {
1394                                 if (err != 0 && err_abort)
1395                                         break;
1396                                 else
1397                                         continue;
1398                         }
1399                         if (!(aa->flags & SSH2_FILEXFER_ATTR_UIDGID)) {
1400                                 error("Can't get current ownership of "
1401                                     "remote file \"%s\"", g.gl_pathv[i]);
1402                                 if (err != 0 && err_abort)
1403                                         break;
1404                                 else
1405                                         continue;
1406                         }
1407                         aa->flags &= SSH2_FILEXFER_ATTR_UIDGID;
1408                         if (cmdnum == I_CHOWN) {
1409                                 printf("Changing owner on %s\n", g.gl_pathv[i]);
1410                                 aa->uid = n_arg;
1411                         } else {
1412                                 printf("Changing group on %s\n", g.gl_pathv[i]);
1413                                 aa->gid = n_arg;
1414                         }
1415                         err = do_setstat(conn, g.gl_pathv[i], aa);
1416                         if (err != 0 && err_abort)
1417                                 break;
1418                 }
1419                 break;
1420         case I_PWD:
1421                 printf("Remote working directory: %s\n", *pwd);
1422                 break;
1423         case I_LPWD:
1424                 if (!getcwd(path_buf, sizeof(path_buf))) {
1425                         error("Couldn't get local cwd: %s", strerror(errno));
1426                         err = -1;
1427                         break;
1428                 }
1429                 printf("Local working directory: %s\n", path_buf);
1430                 break;
1431         case I_QUIT:
1432                 /* Processed below */
1433                 break;
1434         case I_HELP:
1435                 help();
1436                 break;
1437         case I_VERSION:
1438                 printf("SFTP protocol version %u\n", sftp_proto_version(conn));
1439                 break;
1440         case I_PROGRESS:
1441                 showprogress = !showprogress;
1442                 if (showprogress)
1443                         printf("Progress meter enabled\n");
1444                 else
1445                         printf("Progress meter disabled\n");
1446                 break;
1447         default:
1448                 fatal("%d is not implemented", cmdnum);
1449         }
1450
1451         if (g.gl_pathc)
1452                 globfree(&g);
1453         if (path1)
1454                 xfree(path1);
1455         if (path2)
1456                 xfree(path2);
1457
1458         /* If an unignored error occurs in batch mode we should abort. */
1459         if (err_abort && err != 0)
1460                 return (-1);
1461         else if (cmdnum == I_QUIT)
1462                 return (1);
1463
1464         return (0);
1465 }
1466
1467 #ifdef USE_LIBEDIT
1468 static char *
1469 prompt(EditLine *el)
1470 {
1471         return ("sftp> ");
1472 }
1473 #endif
1474
1475 int
1476 interactive_loop(int fd_in, int fd_out, char *file1, char *file2)
1477 {
1478         char *pwd;
1479         char *dir = NULL;
1480         char cmd[2048];
1481         struct sftp_conn *conn;
1482         int err, interactive;
1483         EditLine *el = NULL;
1484 #ifdef USE_LIBEDIT
1485         History *hl = NULL;
1486         HistEvent hev;
1487         extern char *__progname;
1488
1489         if (!batchmode && isatty(STDIN_FILENO)) {
1490                 if ((el = el_init(__progname, stdin, stdout, stderr)) == NULL)
1491                         fatal("Couldn't initialise editline");
1492                 if ((hl = history_init()) == NULL)
1493                         fatal("Couldn't initialise editline history");
1494                 history(hl, &hev, H_SETSIZE, 100);
1495                 el_set(el, EL_HIST, history, hl);
1496
1497                 el_set(el, EL_PROMPT, prompt);
1498                 el_set(el, EL_EDITOR, "emacs");
1499                 el_set(el, EL_TERMINAL, NULL);
1500                 el_set(el, EL_SIGNAL, 1);
1501                 el_source(el, NULL);
1502         }
1503 #endif /* USE_LIBEDIT */
1504
1505         conn = do_init(fd_in, fd_out, copy_buffer_len, num_requests);
1506         if (conn == NULL)
1507                 fatal("Couldn't initialise connection to server");
1508
1509         pwd = do_realpath(conn, ".");
1510         if (pwd == NULL)
1511                 fatal("Need cwd");
1512
1513         if (file1 != NULL) {
1514                 dir = xstrdup(file1);
1515                 dir = make_absolute(dir, pwd);
1516
1517                 if (remote_is_dir(conn, dir) && file2 == NULL) {
1518                         printf("Changing to: %s\n", dir);
1519                         snprintf(cmd, sizeof cmd, "cd \"%s\"", dir);
1520                         if (parse_dispatch_command(conn, cmd, &pwd, 1) != 0) {
1521                                 xfree(dir);
1522                                 xfree(pwd);
1523                                 xfree(conn);
1524                                 return (-1);
1525                         }
1526                 } else {
1527                         if (file2 == NULL)
1528                                 snprintf(cmd, sizeof cmd, "get %s", dir);
1529                         else
1530                                 snprintf(cmd, sizeof cmd, "get %s %s", dir,
1531                                     file2);
1532
1533                         err = parse_dispatch_command(conn, cmd, &pwd, 1);
1534                         xfree(dir);
1535                         xfree(pwd);
1536                         xfree(conn);
1537                         return (err);
1538                 }
1539                 xfree(dir);
1540         }
1541
1542 #if defined(HAVE_SETVBUF) && !defined(BROKEN_SETVBUF)
1543         setvbuf(stdout, NULL, _IOLBF, 0);
1544         setvbuf(infile, NULL, _IOLBF, 0);
1545 #else
1546         setlinebuf(stdout);
1547         setlinebuf(infile);
1548 #endif
1549
1550         interactive = !batchmode && isatty(STDIN_FILENO);
1551         err = 0;
1552         for (;;) {
1553                 char *cp;
1554
1555                 signal(SIGINT, SIG_IGN);
1556
1557                 if (el == NULL) {
1558                         if (interactive)
1559                                 printf("sftp> ");
1560                         if (fgets(cmd, sizeof(cmd), infile) == NULL) {
1561                                 if (interactive)
1562                                         printf("\n");
1563                                 break;
1564                         }
1565                         if (!interactive) { /* Echo command */
1566                                 printf("sftp> %s", cmd);
1567                                 if (strlen(cmd) > 0 &&
1568                                     cmd[strlen(cmd) - 1] != '\n')
1569                                         printf("\n");
1570                         }
1571                 } else {
1572 #ifdef USE_LIBEDIT
1573                         const char *line;
1574                         int count = 0;
1575
1576                         if ((line = el_gets(el, &count)) == NULL || count <= 0) {
1577                                 printf("\n");
1578                                 break;
1579                         }
1580                         history(hl, &hev, H_ENTER, line);
1581                         if (strlcpy(cmd, line, sizeof(cmd)) >= sizeof(cmd)) {
1582                                 fprintf(stderr, "Error: input line too long\n");
1583                                 continue;
1584                         }
1585 #endif /* USE_LIBEDIT */
1586                 }
1587
1588                 cp = strrchr(cmd, '\n');
1589                 if (cp)
1590                         *cp = '\0';
1591
1592                 /* Handle user interrupts gracefully during commands */
1593                 interrupted = 0;
1594                 signal(SIGINT, cmd_interrupt);
1595
1596                 err = parse_dispatch_command(conn, cmd, &pwd, batchmode);
1597                 if (err != 0)
1598                         break;
1599         }
1600         xfree(pwd);
1601         xfree(conn);
1602
1603 #ifdef USE_LIBEDIT
1604         if (el != NULL)
1605                 el_end(el);
1606 #endif /* USE_LIBEDIT */
1607
1608         /* err == 1 signifies normal "quit" exit */
1609         return (err >= 0 ? 0 : -1);
1610 }
1611
1612 static void
1613 connect_to_server(char *path, char **args, int *in, int *out)
1614 {
1615         int c_in, c_out;
1616
1617 #ifdef USE_PIPES
1618         int pin[2], pout[2];
1619
1620         if ((pipe(pin) == -1) || (pipe(pout) == -1))
1621                 fatal("pipe: %s", strerror(errno));
1622         *in = pin[0];
1623         *out = pout[1];
1624         c_in = pout[0];
1625         c_out = pin[1];
1626 #else /* USE_PIPES */
1627         int inout[2];
1628
1629         if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) == -1)
1630                 fatal("socketpair: %s", strerror(errno));
1631         *in = *out = inout[0];
1632         c_in = c_out = inout[1];
1633 #endif /* USE_PIPES */
1634
1635         if ((sshpid = fork()) == -1)
1636                 fatal("fork: %s", strerror(errno));
1637         else if (sshpid == 0) {
1638                 if ((dup2(c_in, STDIN_FILENO) == -1) ||
1639                     (dup2(c_out, STDOUT_FILENO) == -1)) {
1640                         fprintf(stderr, "dup2: %s\n", strerror(errno));
1641                         _exit(1);
1642                 }
1643                 close(*in);
1644                 close(*out);
1645                 close(c_in);
1646                 close(c_out);
1647
1648                 /*
1649                  * The underlying ssh is in the same process group, so we must
1650                  * ignore SIGINT if we want to gracefully abort commands,
1651                  * otherwise the signal will make it to the ssh process and
1652                  * kill it too
1653                  */
1654                 signal(SIGINT, SIG_IGN);
1655                 execvp(path, args);
1656                 fprintf(stderr, "exec: %s: %s\n", path, strerror(errno));
1657                 _exit(1);
1658         }
1659
1660         signal(SIGTERM, killchild);
1661         signal(SIGINT, killchild);
1662         signal(SIGHUP, killchild);
1663         close(c_in);
1664         close(c_out);
1665 }
1666
1667 static void
1668 usage(void)
1669 {
1670         extern char *__progname;
1671
1672         fprintf(stderr,
1673             "usage: %s [-1Cv] [-B buffer_size] [-b batchfile] [-F ssh_config]\n"
1674             "            [-o ssh_option] [-P sftp_server_path] [-R num_requests]\n"
1675             "            [-S program] [-s subsystem | sftp_server] host\n"
1676             "       %s [[user@]host[:file [file]]]\n"
1677             "       %s [[user@]host[:dir[/]]]\n"
1678             "       %s -b batchfile [user@]host\n", __progname, __progname, __progname, __progname);
1679         exit(1);
1680 }
1681
1682 int
1683 main(int argc, char **argv)
1684 {
1685         int in, out, ch, err;
1686         char *host, *userhost, *cp, *file2 = NULL;
1687         int debug_level = 0, sshver = 2;
1688         char *file1 = NULL, *sftp_server = NULL;
1689         char *ssh_program = _PATH_SSH_PROGRAM, *sftp_direct = NULL;
1690         LogLevel ll = SYSLOG_LEVEL_INFO;
1691         arglist args;
1692         extern int optind;
1693         extern char *optarg;
1694
1695         /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
1696         sanitise_stdfd();
1697
1698         __progname = ssh_get_progname(argv[0]);
1699         memset(&args, '\0', sizeof(args));
1700         args.list = NULL;
1701         addargs(&args, "%s", ssh_program);
1702         addargs(&args, "-oForwardX11 no");
1703         addargs(&args, "-oForwardAgent no");
1704         addargs(&args, "-oPermitLocalCommand no");
1705         addargs(&args, "-oClearAllForwardings yes");
1706
1707         ll = SYSLOG_LEVEL_INFO;
1708         infile = stdin;
1709
1710         while ((ch = getopt(argc, argv, "1hvCo:s:S:b:B:F:P:R:")) != -1) {
1711                 switch (ch) {
1712                 case 'C':
1713                         addargs(&args, "-C");
1714                         break;
1715                 case 'v':
1716                         if (debug_level < 3) {
1717                                 addargs(&args, "-v");
1718                                 ll = SYSLOG_LEVEL_DEBUG1 + debug_level;
1719                         }
1720                         debug_level++;
1721                         break;
1722                 case 'F':
1723                 case 'o':
1724                         addargs(&args, "-%c%s", ch, optarg);
1725                         break;
1726                 case '1':
1727                         sshver = 1;
1728                         if (sftp_server == NULL)
1729                                 sftp_server = _PATH_SFTP_SERVER;
1730                         break;
1731                 case 's':
1732                         sftp_server = optarg;
1733                         break;
1734                 case 'S':
1735                         ssh_program = optarg;
1736                         replacearg(&args, 0, "%s", ssh_program);
1737                         break;
1738                 case 'b':
1739                         if (batchmode)
1740                                 fatal("Batch file already specified.");
1741
1742                         /* Allow "-" as stdin */
1743                         if (strcmp(optarg, "-") != 0 &&
1744                             (infile = fopen(optarg, "r")) == NULL)
1745                                 fatal("%s (%s).", strerror(errno), optarg);
1746                         showprogress = 0;
1747                         batchmode = 1;
1748                         addargs(&args, "-obatchmode yes");
1749                         break;
1750                 case 'P':
1751                         sftp_direct = optarg;
1752                         break;
1753                 case 'B':
1754                         copy_buffer_len = strtol(optarg, &cp, 10);
1755                         if (copy_buffer_len == 0 || *cp != '\0')
1756                                 fatal("Invalid buffer size \"%s\"", optarg);
1757                         break;
1758                 case 'R':
1759                         num_requests = strtol(optarg, &cp, 10);
1760                         if (num_requests == 0 || *cp != '\0')
1761                                 fatal("Invalid number of requests \"%s\"",
1762                                     optarg);
1763                         break;
1764                 case 'h':
1765                 default:
1766                         usage();
1767                 }
1768         }
1769
1770         if (!isatty(STDERR_FILENO))
1771                 showprogress = 0;
1772
1773         log_init(argv[0], ll, SYSLOG_FACILITY_USER, 1);
1774
1775         if (sftp_direct == NULL) {
1776                 if (optind == argc || argc > (optind + 2))
1777                         usage();
1778
1779                 userhost = xstrdup(argv[optind]);
1780                 file2 = argv[optind+1];
1781
1782                 if ((host = strrchr(userhost, '@')) == NULL)
1783                         host = userhost;
1784                 else {
1785                         *host++ = '\0';
1786                         if (!userhost[0]) {
1787                                 fprintf(stderr, "Missing username\n");
1788                                 usage();
1789                         }
1790                         addargs(&args, "-l%s", userhost);
1791                 }
1792
1793                 if ((cp = colon(host)) != NULL) {
1794                         *cp++ = '\0';
1795                         file1 = cp;
1796                 }
1797
1798                 host = cleanhostname(host);
1799                 if (!*host) {
1800                         fprintf(stderr, "Missing hostname\n");
1801                         usage();
1802                 }
1803
1804                 addargs(&args, "-oProtocol %d", sshver);
1805
1806                 /* no subsystem if the server-spec contains a '/' */
1807                 if (sftp_server == NULL || strchr(sftp_server, '/') == NULL)
1808                         addargs(&args, "-s");
1809
1810                 addargs(&args, "%s", host);
1811                 addargs(&args, "%s", (sftp_server != NULL ?
1812                     sftp_server : "sftp"));
1813
1814                 if (!batchmode)
1815                         fprintf(stderr, "Connecting to %s...\n", host);
1816                 connect_to_server(ssh_program, args.list, &in, &out);
1817         } else {
1818                 args.list = NULL;
1819                 addargs(&args, "sftp-server");
1820
1821                 if (!batchmode)
1822                         fprintf(stderr, "Attaching to %s...\n", sftp_direct);
1823                 connect_to_server(sftp_direct, args.list, &in, &out);
1824         }
1825         freeargs(&args);
1826
1827         err = interactive_loop(in, out, file1, file2);
1828
1829 #if !defined(USE_PIPES)
1830         shutdown(in, SHUT_RDWR);
1831         shutdown(out, SHUT_RDWR);
1832 #endif
1833
1834         close(in);
1835         close(out);
1836         if (batchmode)
1837                 fclose(infile);
1838
1839         while (waitpid(sshpid, NULL, 0) == -1)
1840                 if (errno != EINTR)
1841                         fatal("Couldn't wait for ssh process: %s",
1842                             strerror(errno));
1843
1844         exit(err == 0 ? 0 : 1);
1845 }
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