]> andersk Git - openssh.git/blob - sftp-int.c
- djm@cvs.openbsd.org 2002/02/05 00:00:46
[openssh.git] / sftp-int.c
1 /*
2  * Copyright (c) 2001 Damien Miller.  All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23  */
24
25 /* XXX: globbed ls */
26 /* XXX: recursive operations */
27
28 #include "includes.h"
29 RCSID("$OpenBSD: sftp-int.c,v 1.42 2002/02/05 00:00:46 djm Exp $");
30
31 #include "buffer.h"
32 #include "xmalloc.h"
33 #include "log.h"
34 #include "pathnames.h"
35
36 #include "sftp.h"
37 #include "sftp-common.h"
38 #include "sftp-glob.h"
39 #include "sftp-client.h"
40 #include "sftp-int.h"
41
42 /* File to read commands from */
43 extern FILE *infile;
44
45 /* Size of buffer used when copying files */
46 extern size_t copy_buffer_len;
47
48 /* Version of server we are speaking to */
49 int version;
50
51 /* Seperators for interactive commands */
52 #define WHITESPACE " \t\r\n"
53
54 /* Commands for interactive mode */
55 #define I_CHDIR         1
56 #define I_CHGRP         2
57 #define I_CHMOD         3
58 #define I_CHOWN         4
59 #define I_GET           5
60 #define I_HELP          6
61 #define I_LCHDIR        7
62 #define I_LLS           8
63 #define I_LMKDIR        9
64 #define I_LPWD          10
65 #define I_LS            11
66 #define I_LUMASK        12
67 #define I_MKDIR         13
68 #define I_PUT           14
69 #define I_PWD           15
70 #define I_QUIT          16
71 #define I_RENAME        17
72 #define I_RM            18
73 #define I_RMDIR         19
74 #define I_SHELL         20
75 #define I_SYMLINK       21
76 #define I_VERSION       22
77
78 struct CMD {
79         const char *c;
80         const int n;
81 };
82
83 const struct CMD cmds[] = {
84         { "bye",        I_QUIT },
85         { "cd",         I_CHDIR },
86         { "chdir",      I_CHDIR },
87         { "chgrp",      I_CHGRP },
88         { "chmod",      I_CHMOD },
89         { "chown",      I_CHOWN },
90         { "dir",        I_LS },
91         { "exit",       I_QUIT },
92         { "get",        I_GET },
93         { "mget",       I_GET },
94         { "help",       I_HELP },
95         { "lcd",        I_LCHDIR },
96         { "lchdir",     I_LCHDIR },
97         { "lls",        I_LLS },
98         { "lmkdir",     I_LMKDIR },
99         { "ln",         I_SYMLINK },
100         { "lpwd",       I_LPWD },
101         { "ls",         I_LS },
102         { "lumask",     I_LUMASK },
103         { "mkdir",      I_MKDIR },
104         { "put",        I_PUT },
105         { "mput",       I_PUT },
106         { "pwd",        I_PWD },
107         { "quit",       I_QUIT },
108         { "rename",     I_RENAME },
109         { "rm",         I_RM },
110         { "rmdir",      I_RMDIR },
111         { "symlink",    I_SYMLINK },
112         { "version",    I_VERSION },
113         { "!",          I_SHELL },
114         { "?",          I_HELP },
115         { NULL,                 -1}
116 };
117
118 static void
119 help(void)
120 {
121         printf("Available commands:\n");
122         printf("cd path                       Change remote directory to 'path'\n");
123         printf("lcd path                      Change local directory to 'path'\n");
124         printf("chgrp grp path                Change group of file 'path' to 'grp'\n");
125         printf("chmod mode path               Change permissions of file 'path' to 'mode'\n");
126         printf("chown own path                Change owner of file 'path' to 'own'\n");
127         printf("help                          Display this help text\n");
128         printf("get remote-path [local-path]  Download file\n");
129         printf("lls [ls-options [path]]       Display local directory listing\n");
130         printf("ln oldpath newpath            Symlink remote file\n");
131         printf("lmkdir path                   Create local directory\n");
132         printf("lpwd                          Print local working directory\n");
133         printf("ls [path]                     Display remote directory listing\n");
134         printf("lumask umask                  Set local umask to 'umask'\n");
135         printf("mkdir path                    Create remote directory\n");
136         printf("put local-path [remote-path]  Upload file\n");
137         printf("pwd                           Display remote working directory\n");
138         printf("exit                          Quit sftp\n");
139         printf("quit                          Quit sftp\n");
140         printf("rename oldpath newpath        Rename remote file\n");
141         printf("rmdir path                    Remove remote directory\n");
142         printf("rm path                       Delete remote file\n");
143         printf("symlink oldpath newpath       Symlink remote file\n");
144         printf("version                       Show SFTP version\n");
145         printf("!command                      Execute 'command' in local shell\n");
146         printf("!                             Escape to local shell\n");
147         printf("?                             Synonym for help\n");
148 }
149
150 static void
151 local_do_shell(const char *args)
152 {
153         int status;
154         char *shell;
155         pid_t pid;
156
157         if (!*args)
158                 args = NULL;
159
160         if ((shell = getenv("SHELL")) == NULL)
161                 shell = _PATH_BSHELL;
162
163         if ((pid = fork()) == -1)
164                 fatal("Couldn't fork: %s", strerror(errno));
165
166         if (pid == 0) {
167                 /* XXX: child has pipe fds to ssh subproc open - issue? */
168                 if (args) {
169                         debug3("Executing %s -c \"%s\"", shell, args);
170                         execl(shell, shell, "-c", args, (char *)NULL);
171                 } else {
172                         debug3("Executing %s", shell);
173                         execl(shell, shell, (char *)NULL);
174                 }
175                 fprintf(stderr, "Couldn't execute \"%s\": %s\n", shell,
176                     strerror(errno));
177                 _exit(1);
178         }
179         if (waitpid(pid, &status, 0) == -1)
180                 fatal("Couldn't wait for child: %s", strerror(errno));
181         if (!WIFEXITED(status))
182                 error("Shell exited abormally");
183         else if (WEXITSTATUS(status))
184                 error("Shell exited with status %d", WEXITSTATUS(status));
185 }
186
187 static void
188 local_do_ls(const char *args)
189 {
190         if (!args || !*args)
191                 local_do_shell(_PATH_LS);
192         else {
193                 int len = strlen(_PATH_LS " ") + strlen(args) + 1;
194                 char *buf = xmalloc(len);
195
196                 /* XXX: quoting - rip quoting code from ftp? */
197                 snprintf(buf, len, _PATH_LS " %s", args);
198                 local_do_shell(buf);
199                 xfree(buf);
200         }
201 }
202
203 static char *
204 path_append(char *p1, char *p2)
205 {
206         char *ret;
207         int len = strlen(p1) + strlen(p2) + 2;
208
209         ret = xmalloc(len);
210         strlcpy(ret, p1, len);
211         if (strcmp(p1, "/") != 0)
212                 strlcat(ret, "/", len);
213         strlcat(ret, p2, len);
214
215         return(ret);
216 }
217
218 static char *
219 make_absolute(char *p, char *pwd)
220 {
221         char *abs;
222
223         /* Derelativise */
224         if (p && p[0] != '/') {
225                 abs = path_append(pwd, p);
226                 xfree(p);
227                 return(abs);
228         } else
229                 return(p);
230 }
231
232 static int
233 infer_path(const char *p, char **ifp)
234 {
235         char *cp;
236
237         cp = strrchr(p, '/');
238         if (cp == NULL) {
239                 *ifp = xstrdup(p);
240                 return(0);
241         }
242
243         if (!cp[1]) {
244                 error("Invalid path");
245                 return(-1);
246         }
247
248         *ifp = xstrdup(cp + 1);
249         return(0);
250 }
251
252 static int
253 parse_getput_flags(const char **cpp, int *pflag)
254 {
255         const char *cp = *cpp;
256
257         /* Check for flags */
258         if (cp[0] == '-' && cp[1] && strchr(WHITESPACE, cp[2])) {
259                 switch (cp[1]) {
260                 case 'p':
261                 case 'P':
262                         *pflag = 1;
263                         break;
264                 default:
265                         error("Invalid flag -%c", cp[1]);
266                         return(-1);
267                 }
268                 cp += 2;
269                 *cpp = cp + strspn(cp, WHITESPACE);
270         }
271
272         return(0);
273 }
274
275 static int
276 get_pathname(const char **cpp, char **path)
277 {
278         const char *cp = *cpp, *end;
279         char quot;
280         int i;
281
282         cp += strspn(cp, WHITESPACE);
283         if (!*cp) {
284                 *cpp = cp;
285                 *path = NULL;
286                 return (0);
287         }
288
289         /* Check for quoted filenames */
290         if (*cp == '\"' || *cp == '\'') {
291                 quot = *cp++;
292
293                 end = strchr(cp, quot);
294                 if (end == NULL) {
295                         error("Unterminated quote");
296                         goto fail;
297                 }
298                 if (cp == end) {
299                         error("Empty quotes");
300                         goto fail;
301                 }
302                 *cpp = end + 1 + strspn(end + 1, WHITESPACE);
303         } else {
304                 /* Read to end of filename */
305                 end = strpbrk(cp, WHITESPACE);
306                 if (end == NULL)
307                         end = strchr(cp, '\0');
308                 *cpp = end + strspn(end, WHITESPACE);
309         }
310
311         i = end - cp;
312
313         *path = xmalloc(i + 1);
314         memcpy(*path, cp, i);
315         (*path)[i] = '\0';
316         return(0);
317
318  fail:
319         *path = NULL;
320         return (-1);
321 }
322
323 static int
324 is_dir(char *path)
325 {
326         struct stat sb;
327
328         /* XXX: report errors? */
329         if (stat(path, &sb) == -1)
330                 return(0);
331
332         return(sb.st_mode & S_IFDIR);
333 }
334
335 static int
336 remote_is_dir(int in, int out, char *path)
337 {
338         Attrib *a;
339
340         /* XXX: report errors? */
341         if ((a = do_stat(in, out, path, 1)) == NULL)
342                 return(0);
343         if (!(a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS))
344                 return(0);
345         return(a->perm & S_IFDIR);
346 }
347
348 static int
349 process_get(int in, int out, char *src, char *dst, char *pwd, int pflag)
350 {
351         char *abs_src = NULL;
352         char *abs_dst = NULL;
353         char *tmp;
354         glob_t g;
355         int err = 0;
356         int i;
357
358         abs_src = xstrdup(src);
359         abs_src = make_absolute(abs_src, pwd);
360
361         memset(&g, 0, sizeof(g));
362         debug3("Looking up %s", abs_src);
363         if (remote_glob(in, out, abs_src, 0, NULL, &g)) {
364                 error("File \"%s\" not found.", abs_src);
365                 err = -1;
366                 goto out;
367         }
368
369         /* Only one match, dst may be file, directory or unspecified */
370         if (g.gl_pathv[0] && g.gl_matchc == 1) {
371                 if (dst) {
372                         /* If directory specified, append filename */
373                         if (is_dir(dst)) {
374                                 if (infer_path(g.gl_pathv[0], &tmp)) {
375                                         err = 1;
376                                         goto out;
377                                 }
378                                 abs_dst = path_append(dst, tmp);
379                                 xfree(tmp);
380                         } else
381                                 abs_dst = xstrdup(dst);
382                 } else if (infer_path(g.gl_pathv[0], &abs_dst)) {
383                         err = -1;
384                         goto out;
385                 }
386                 printf("Fetching %s to %s\n", g.gl_pathv[0], abs_dst);
387                 err = do_download(in, out, g.gl_pathv[0], abs_dst, pflag,
388                     copy_buffer_len);
389                 goto out;
390         }
391
392         /* Multiple matches, dst may be directory or unspecified */
393         if (dst && !is_dir(dst)) {
394                 error("Multiple files match, but \"%s\" is not a directory",
395                     dst);
396                 err = -1;
397                 goto out;
398         }
399
400         for (i = 0; g.gl_pathv[i]; i++) {
401                 if (infer_path(g.gl_pathv[i], &tmp)) {
402                         err = -1;
403                         goto out;
404                 }
405                 if (dst) {
406                         abs_dst = path_append(dst, tmp);
407                         xfree(tmp);
408                 } else
409                         abs_dst = tmp;
410
411                 printf("Fetching %s to %s\n", g.gl_pathv[i], abs_dst);
412                 if (do_download(in, out, g.gl_pathv[i], abs_dst, pflag,
413                     copy_buffer_len) == -1)
414                         err = -1;
415                 xfree(abs_dst);
416                 abs_dst = NULL;
417         }
418
419 out:
420         xfree(abs_src);
421         if (abs_dst)
422                 xfree(abs_dst);
423         globfree(&g);
424         return(err);
425 }
426
427 static int
428 process_put(int in, int out, char *src, char *dst, char *pwd, int pflag)
429 {
430         char *tmp_dst = NULL;
431         char *abs_dst = NULL;
432         char *tmp;
433         glob_t g;
434         int err = 0;
435         int i;
436
437         if (dst) {
438                 tmp_dst = xstrdup(dst);
439                 tmp_dst = make_absolute(tmp_dst, pwd);
440         }
441
442         memset(&g, 0, sizeof(g));
443         debug3("Looking up %s", src);
444         if (glob(src, 0, NULL, &g)) {
445                 error("File \"%s\" not found.", src);
446                 err = -1;
447                 goto out;
448         }
449
450         /* Only one match, dst may be file, directory or unspecified */
451         if (g.gl_pathv[0] && g.gl_matchc == 1) {
452                 if (tmp_dst) {
453                         /* If directory specified, append filename */
454                         if (remote_is_dir(in, out, tmp_dst)) {
455                                 if (infer_path(g.gl_pathv[0], &tmp)) {
456                                         err = 1;
457                                         goto out;
458                                 }
459                                 abs_dst = path_append(tmp_dst, tmp);
460                                 xfree(tmp);
461                         } else
462                                 abs_dst = xstrdup(tmp_dst);
463                 } else {
464                         if (infer_path(g.gl_pathv[0], &abs_dst)) {
465                                 err = -1;
466                                 goto out;
467                         }
468                         abs_dst = make_absolute(abs_dst, pwd);
469                 }
470                 printf("Uploading %s to %s\n", g.gl_pathv[0], abs_dst);
471                 err = do_upload(in, out, g.gl_pathv[0], abs_dst, pflag,
472                     copy_buffer_len);
473                 goto out;
474         }
475
476         /* Multiple matches, dst may be directory or unspecified */
477         if (tmp_dst && !remote_is_dir(in, out, tmp_dst)) {
478                 error("Multiple files match, but \"%s\" is not a directory",
479                     tmp_dst);
480                 err = -1;
481                 goto out;
482         }
483
484         for (i = 0; g.gl_pathv[i]; i++) {
485                 if (infer_path(g.gl_pathv[i], &tmp)) {
486                         err = -1;
487                         goto out;
488                 }
489                 if (tmp_dst) {
490                         abs_dst = path_append(tmp_dst, tmp);
491                         xfree(tmp);
492                 } else
493                         abs_dst = make_absolute(tmp, pwd);
494
495                 printf("Uploading %s to %s\n", g.gl_pathv[i], abs_dst);
496                 if (do_upload(in, out, g.gl_pathv[i], abs_dst, pflag, 
497                     copy_buffer_len) == -1)
498                         err = -1;
499         }
500
501 out:
502         if (abs_dst)
503                 xfree(abs_dst);
504         if (tmp_dst)
505                 xfree(tmp_dst);
506         return(err);
507 }
508
509 static int
510 parse_args(const char **cpp, int *pflag, unsigned long *n_arg,
511     char **path1, char **path2)
512 {
513         const char *cmd, *cp = *cpp;
514         char *cp2;
515         int base = 0;
516         long l;
517         int i, cmdnum;
518
519         /* Skip leading whitespace */
520         cp = cp + strspn(cp, WHITESPACE);
521
522         /* Ignore blank lines */
523         if (!*cp)
524                 return(-1);
525
526         /* Figure out which command we have */
527         for (i = 0; cmds[i].c; i++) {
528                 int cmdlen = strlen(cmds[i].c);
529
530                 /* Check for command followed by whitespace */
531                 if (!strncasecmp(cp, cmds[i].c, cmdlen) &&
532                     strchr(WHITESPACE, cp[cmdlen])) {
533                         cp += cmdlen;
534                         cp = cp + strspn(cp, WHITESPACE);
535                         break;
536                 }
537         }
538         cmdnum = cmds[i].n;
539         cmd = cmds[i].c;
540
541         /* Special case */
542         if (*cp == '!') {
543                 cp++;
544                 cmdnum = I_SHELL;
545         } else if (cmdnum == -1) {
546                 error("Invalid command.");
547                 return(-1);
548         }
549
550         /* Get arguments and parse flags */
551         *pflag = *n_arg = 0;
552         *path1 = *path2 = NULL;
553         switch (cmdnum) {
554         case I_GET:
555         case I_PUT:
556                 if (parse_getput_flags(&cp, pflag))
557                         return(-1);
558                 /* Get first pathname (mandatory) */
559                 if (get_pathname(&cp, path1))
560                         return(-1);
561                 if (*path1 == NULL) {
562                         error("You must specify at least one path after a "
563                             "%s command.", cmd);
564                         return(-1);
565                 }
566                 /* Try to get second pathname (optional) */
567                 if (get_pathname(&cp, path2))
568                         return(-1);
569                 break;
570         case I_RENAME:
571         case I_SYMLINK:
572                 if (get_pathname(&cp, path1))
573                         return(-1);
574                 if (get_pathname(&cp, path2))
575                         return(-1);
576                 if (!*path1 || !*path2) {
577                         error("You must specify two paths after a %s "
578                             "command.", cmd);
579                         return(-1);
580                 }
581                 break;
582         case I_RM:
583         case I_MKDIR:
584         case I_RMDIR:
585         case I_CHDIR:
586         case I_LCHDIR:
587         case I_LMKDIR:
588                 /* Get pathname (mandatory) */
589                 if (get_pathname(&cp, path1))
590                         return(-1);
591                 if (*path1 == NULL) {
592                         error("You must specify a path after a %s command.",
593                             cmd);
594                         return(-1);
595                 }
596                 break;
597         case I_LS:
598                 /* Path is optional */
599                 if (get_pathname(&cp, path1))
600                         return(-1);
601                 break;
602         case I_LLS:
603         case I_SHELL:
604                 /* Uses the rest of the line */
605                 break;
606         case I_LUMASK:
607                 base = 8;
608         case I_CHMOD:
609                 base = 8;
610         case I_CHOWN:
611         case I_CHGRP:
612                 /* Get numeric arg (mandatory) */
613                 l = strtol(cp, &cp2, base);
614                 if (cp2 == cp || ((l == LONG_MIN || l == LONG_MAX) &&
615                     errno == ERANGE) || l < 0) {
616                         error("You must supply a numeric argument "
617                             "to the %s command.", cmd);
618                         return(-1);
619                 }
620                 cp = cp2;
621                 *n_arg = l;
622                 if (cmdnum == I_LUMASK && strchr(WHITESPACE, *cp))
623                         break;
624                 if (cmdnum == I_LUMASK || !strchr(WHITESPACE, *cp)) {
625                         error("You must supply a numeric argument "
626                             "to the %s command.", cmd);
627                         return(-1);
628                 }
629                 cp += strspn(cp, WHITESPACE);
630
631                 /* Get pathname (mandatory) */
632                 if (get_pathname(&cp, path1))
633                         return(-1);
634                 if (*path1 == NULL) {
635                         error("You must specify a path after a %s command.",
636                             cmd);
637                         return(-1);
638                 }
639                 break;
640         case I_QUIT:
641         case I_PWD:
642         case I_LPWD:
643         case I_HELP:
644         case I_VERSION:
645                 break;
646         default:
647                 fatal("Command not implemented");
648         }
649
650         *cpp = cp;
651         return(cmdnum);
652 }
653
654 static int
655 parse_dispatch_command(int in, int out, const char *cmd, char **pwd)
656 {
657         char *path1, *path2, *tmp;
658         int pflag, cmdnum, i;
659         unsigned long n_arg;
660         Attrib a, *aa;
661         char path_buf[MAXPATHLEN];
662         int err = 0;
663         glob_t g;
664
665         path1 = path2 = NULL;
666         cmdnum = parse_args(&cmd, &pflag, &n_arg, &path1, &path2);
667
668         memset(&g, 0, sizeof(g));
669
670         /* Perform command */
671         switch (cmdnum) {
672         case -1:
673                 break;
674         case I_GET:
675                 err = process_get(in, out, path1, path2, *pwd, pflag);
676                 break;
677         case I_PUT:
678                 err = process_put(in, out, path1, path2, *pwd, pflag);
679                 break;
680         case I_RENAME:
681                 path1 = make_absolute(path1, *pwd);
682                 path2 = make_absolute(path2, *pwd);
683                 err = do_rename(in, out, path1, path2);
684                 break;
685         case I_SYMLINK:
686                 if (version < 3) {
687                         error("The server (version %d) does not support "
688                             "this operation", version);
689                         err = -1;
690                 } else {
691                         path2 = make_absolute(path2, *pwd);
692                         err = do_symlink(in, out, path1, path2);
693                 }
694                 break;
695         case I_RM:
696                 path1 = make_absolute(path1, *pwd);
697                 remote_glob(in, out, path1, GLOB_NOCHECK, NULL, &g);
698                 for (i = 0; g.gl_pathv[i]; i++) {
699                         printf("Removing %s\n", g.gl_pathv[i]);
700                         if (do_rm(in, out, g.gl_pathv[i]) == -1)
701                                 err = -1;
702                 }
703                 break;
704         case I_MKDIR:
705                 path1 = make_absolute(path1, *pwd);
706                 attrib_clear(&a);
707                 a.flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
708                 a.perm = 0777;
709                 err = do_mkdir(in, out, path1, &a);
710                 break;
711         case I_RMDIR:
712                 path1 = make_absolute(path1, *pwd);
713                 err = do_rmdir(in, out, path1);
714                 break;
715         case I_CHDIR:
716                 path1 = make_absolute(path1, *pwd);
717                 if ((tmp = do_realpath(in, out, path1)) == NULL) {
718                         err = 1;
719                         break;
720                 }
721                 if ((aa = do_stat(in, out, tmp, 0)) == NULL) {
722                         xfree(tmp);
723                         err = 1;
724                         break;
725                 }
726                 if (!(aa->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)) {
727                         error("Can't change directory: Can't check target");
728                         xfree(tmp);
729                         err = 1;
730                         break;
731                 }
732                 if (!S_ISDIR(aa->perm)) {
733                         error("Can't change directory: \"%s\" is not "
734                             "a directory", tmp);
735                         xfree(tmp);
736                         err = 1;
737                         break;
738                 }
739                 xfree(*pwd);
740                 *pwd = tmp;
741                 break;
742         case I_LS:
743                 if (!path1) {
744                         do_ls(in, out, *pwd);
745                         break;
746                 }
747                 path1 = make_absolute(path1, *pwd);
748                 if ((tmp = do_realpath(in, out, path1)) == NULL)
749                         break;
750                 xfree(path1);
751                 path1 = tmp;
752                 if ((aa = do_stat(in, out, path1, 0)) == NULL)
753                         break;
754                 if ((aa->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
755                     !S_ISDIR(aa->perm)) {
756                         error("Can't ls: \"%s\" is not a directory", path1);
757                         break;
758                 }
759                 do_ls(in, out, path1);
760                 break;
761         case I_LCHDIR:
762                 if (chdir(path1) == -1) {
763                         error("Couldn't change local directory to "
764                             "\"%s\": %s", path1, strerror(errno));
765                         err = 1;
766                 }
767                 break;
768         case I_LMKDIR:
769                 if (mkdir(path1, 0777) == -1) {
770                         error("Couldn't create local directory "
771                             "\"%s\": %s", path1, strerror(errno));
772                         err = 1;
773                 }
774                 break;
775         case I_LLS:
776                 local_do_ls(cmd);
777                 break;
778         case I_SHELL:
779                 local_do_shell(cmd);
780                 break;
781         case I_LUMASK:
782                 umask(n_arg);
783                 printf("Local umask: %03lo\n", n_arg);
784                 break;
785         case I_CHMOD:
786                 path1 = make_absolute(path1, *pwd);
787                 attrib_clear(&a);
788                 a.flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
789                 a.perm = n_arg;
790                 remote_glob(in, out, path1, GLOB_NOCHECK, NULL, &g);
791                 for (i = 0; g.gl_pathv[i]; i++) {
792                         printf("Changing mode on %s\n", g.gl_pathv[i]);
793                         do_setstat(in, out, g.gl_pathv[i], &a);
794                 }
795                 break;
796         case I_CHOWN:
797                 path1 = make_absolute(path1, *pwd);
798                 remote_glob(in, out, path1, GLOB_NOCHECK, NULL, &g);
799                 for (i = 0; g.gl_pathv[i]; i++) {
800                         if (!(aa = do_stat(in, out, g.gl_pathv[i], 0)))
801                                 continue;
802                         if (!(aa->flags & SSH2_FILEXFER_ATTR_UIDGID)) {
803                                 error("Can't get current ownership of "
804                                     "remote file \"%s\"", g.gl_pathv[i]);
805                                 continue;
806                         }
807                         printf("Changing owner on %s\n", g.gl_pathv[i]);
808                         aa->flags &= SSH2_FILEXFER_ATTR_UIDGID;
809                         aa->uid = n_arg;
810                         do_setstat(in, out, g.gl_pathv[i], aa);
811                 }
812                 break;
813         case I_CHGRP:
814                 path1 = make_absolute(path1, *pwd);
815                 remote_glob(in, out, path1, GLOB_NOCHECK, NULL, &g);
816                 for (i = 0; g.gl_pathv[i]; i++) {
817                         if (!(aa = do_stat(in, out, g.gl_pathv[i], 0)))
818                                 continue;
819                         if (!(aa->flags & SSH2_FILEXFER_ATTR_UIDGID)) {
820                                 error("Can't get current ownership of "
821                                     "remote file \"%s\"", g.gl_pathv[i]);
822                                 continue;
823                         }
824                         printf("Changing group on %s\n", g.gl_pathv[i]);
825                         aa->flags &= SSH2_FILEXFER_ATTR_UIDGID;
826                         aa->gid = n_arg;
827                         do_setstat(in, out, g.gl_pathv[i], aa);
828                 }
829                 break;
830         case I_PWD:
831                 printf("Remote working directory: %s\n", *pwd);
832                 break;
833         case I_LPWD:
834                 if (!getcwd(path_buf, sizeof(path_buf)))
835                         error("Couldn't get local cwd: %s",
836                             strerror(errno));
837                 else
838                         printf("Local working directory: %s\n",
839                             path_buf);
840                 break;
841         case I_QUIT:
842                 return(-1);
843         case I_HELP:
844                 help();
845                 break;
846         case I_VERSION:
847                 printf("SFTP protocol version %d\n", version);
848                 break;
849         default:
850                 fatal("%d is not implemented", cmdnum);
851         }
852
853         if (g.gl_pathc)
854                 globfree(&g);
855         if (path1)
856                 xfree(path1);
857         if (path2)
858                 xfree(path2);
859
860         /* If an error occurs in batch mode we should abort. */
861         if (infile != stdin && err > 0)
862                 return -1;
863
864         return(0);
865 }
866
867 void
868 interactive_loop(int fd_in, int fd_out, char *file1, char *file2)
869 {
870         char *pwd;
871         char *dir = NULL;
872         char cmd[2048];
873
874         version = do_init(fd_in, fd_out);
875         if (version == -1)
876                 fatal("Couldn't initialise connection to server");
877
878         pwd = do_realpath(fd_in, fd_out, ".");
879         if (pwd == NULL)
880                 fatal("Need cwd");
881
882         if (file1 != NULL) {
883                 dir = xstrdup(file1);
884                 dir = make_absolute(dir, pwd);
885
886                 if (remote_is_dir(fd_in, fd_out, dir) && file2 == NULL) {
887                         printf("Changing to: %s\n", dir);
888                         snprintf(cmd, sizeof cmd, "cd \"%s\"", dir);
889                         parse_dispatch_command(fd_in, fd_out, cmd, &pwd);
890                 } else {
891                         if (file2 == NULL)
892                                 snprintf(cmd, sizeof cmd, "get %s", dir);
893                         else
894                                 snprintf(cmd, sizeof cmd, "get %s %s", dir,
895                                     file2);
896
897                         parse_dispatch_command(fd_in, fd_out, cmd, &pwd);
898                         return;
899                 }
900         }
901 #if HAVE_SETVBUF
902         setvbuf(stdout, NULL, _IOLBF, 0);
903         setvbuf(infile, NULL, _IOLBF, 0);
904 #else
905         setlinebuf(stdout);
906         setlinebuf(infile);
907 #endif
908
909         for (;;) {
910                 char *cp;
911
912                 printf("sftp> ");
913
914                 /* XXX: use libedit */
915                 if (fgets(cmd, sizeof(cmd), infile) == NULL) {
916                         printf("\n");
917                         break;
918                 } else if (infile != stdin) /* Bluff typing */
919                         printf("%s", cmd);
920
921                 cp = strrchr(cmd, '\n');
922                 if (cp)
923                         *cp = '\0';
924
925                 if (parse_dispatch_command(fd_in, fd_out, cmd, &pwd))
926                         break;
927         }
928         xfree(pwd);
929 }
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