]> andersk Git - openssh.git/blob - sftp-int.c
- itojun@cvs.openbsd.org 2001/06/23 15:12:20
[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 1.37 2001/06/23 15:12:20 itojun 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 /* Version of server we are speaking to */
46 int version;
47
48 /* Seperators for interactive commands */
49 #define WHITESPACE " \t\r\n"
50
51 /* Commands for interactive mode */
52 #define I_CHDIR         1
53 #define I_CHGRP         2
54 #define I_CHMOD         3
55 #define I_CHOWN         4
56 #define I_GET           5
57 #define I_HELP          6
58 #define I_LCHDIR        7
59 #define I_LLS           8
60 #define I_LMKDIR        9
61 #define I_LPWD          10
62 #define I_LS            11
63 #define I_LUMASK        12
64 #define I_MKDIR         13
65 #define I_PUT           14
66 #define I_PWD           15
67 #define I_QUIT          16
68 #define I_RENAME        17
69 #define I_RM            18
70 #define I_RMDIR         19
71 #define I_SHELL         20
72 #define I_SYMLINK       21
73 #define I_VERSION       22
74
75 struct CMD {
76         const char *c;
77         const int n;
78 };
79
80 const struct CMD cmds[] = {
81         { "cd",         I_CHDIR },
82         { "chdir",      I_CHDIR },
83         { "chgrp",      I_CHGRP },
84         { "chmod",      I_CHMOD },
85         { "chown",      I_CHOWN },
86         { "dir",        I_LS },
87         { "exit",       I_QUIT },
88         { "get",        I_GET },
89         { "mget",       I_GET },
90         { "help",       I_HELP },
91         { "lcd",        I_LCHDIR },
92         { "lchdir",     I_LCHDIR },
93         { "lls",        I_LLS },
94         { "lmkdir",     I_LMKDIR },
95         { "ln",         I_SYMLINK },
96         { "lpwd",       I_LPWD },
97         { "ls",         I_LS },
98         { "lumask",     I_LUMASK },
99         { "mkdir",      I_MKDIR },
100         { "put",        I_PUT },
101         { "mput",       I_PUT },
102         { "pwd",        I_PWD },
103         { "quit",       I_QUIT },
104         { "rename",     I_RENAME },
105         { "rm",         I_RM },
106         { "rmdir",      I_RMDIR },
107         { "symlink",    I_SYMLINK },
108         { "version",    I_VERSION },
109         { "!",          I_SHELL },
110         { "?",          I_HELP },
111         { NULL,                 -1}
112 };
113
114 static void
115 help(void)
116 {
117         printf("Available commands:\n");
118         printf("cd path                       Change remote directory to 'path'\n");
119         printf("lcd path                      Change local directory to 'path'\n");
120         printf("chgrp grp path                Change group of file 'path' to 'grp'\n");
121         printf("chmod mode path               Change permissions of file 'path' to 'mode'\n");
122         printf("chown own path                Change owner of file 'path' to 'own'\n");
123         printf("help                          Display this help text\n");
124         printf("get remote-path [local-path]  Download file\n");
125         printf("lls [ls-options [path]]       Display local directory listing\n");
126         printf("ln oldpath newpath            Symlink remote file\n");
127         printf("lmkdir path                   Create local directory\n");
128         printf("lpwd                          Print local working directory\n");
129         printf("ls [path]                     Display remote directory listing\n");
130         printf("lumask umask                  Set local umask to 'umask'\n");
131         printf("mkdir path                    Create remote directory\n");
132         printf("put local-path [remote-path]  Upload file\n");
133         printf("pwd                           Display remote working directory\n");
134         printf("exit                          Quit sftp\n");
135         printf("quit                          Quit sftp\n");
136         printf("rename oldpath newpath        Rename remote file\n");
137         printf("rmdir path                    Remove remote directory\n");
138         printf("rm path                       Delete remote file\n");
139         printf("symlink oldpath newpath       Symlink remote file\n");
140         printf("version                       Show SFTP version\n");
141         printf("!command                      Execute 'command' in local shell\n");
142         printf("!                             Escape to local shell\n");
143         printf("?                             Synonym for help\n");
144 }
145
146 static void
147 local_do_shell(const char *args)
148 {
149         int status;
150         char *shell;
151         pid_t pid;
152
153         if (!*args)
154                 args = NULL;
155
156         if ((shell = getenv("SHELL")) == NULL)
157                 shell = _PATH_BSHELL;
158
159         if ((pid = fork()) == -1)
160                 fatal("Couldn't fork: %s", strerror(errno));
161
162         if (pid == 0) {
163                 /* XXX: child has pipe fds to ssh subproc open - issue? */
164                 if (args) {
165                         debug3("Executing %s -c \"%s\"", shell, args);
166                         execl(shell, shell, "-c", args, NULL);
167                 } else {
168                         debug3("Executing %s", shell);
169                         execl(shell, shell, NULL);
170                 }
171                 fprintf(stderr, "Couldn't execute \"%s\": %s\n", shell,
172                     strerror(errno));
173                 _exit(1);
174         }
175         if (waitpid(pid, &status, 0) == -1)
176                 fatal("Couldn't wait for child: %s", strerror(errno));
177         if (!WIFEXITED(status))
178                 error("Shell exited abormally");
179         else if (WEXITSTATUS(status))
180                 error("Shell exited with status %d", WEXITSTATUS(status));
181 }
182
183 static void
184 local_do_ls(const char *args)
185 {
186         if (!args || !*args)
187                 local_do_shell(_PATH_LS);
188         else {
189                 int len = strlen(_PATH_LS " ") + strlen(args) + 1;
190                 char *buf = xmalloc(len);
191
192                 /* XXX: quoting - rip quoting code from ftp? */
193                 snprintf(buf, len, _PATH_LS " %s", args);
194                 local_do_shell(buf);
195                 xfree(buf);
196         }
197 }
198
199 static char *
200 path_append(char *p1, char *p2)
201 {
202         char *ret;
203         int len = strlen(p1) + strlen(p2) + 2;
204
205         ret = xmalloc(len);
206         strlcpy(ret, p1, len);
207         strlcat(ret, "/", len);
208         strlcat(ret, p2, len);
209
210         return(ret);
211 }
212
213 static char *
214 make_absolute(char *p, char *pwd)
215 {
216         char *abs;
217
218         /* Derelativise */
219         if (p && p[0] != '/') {
220                 abs = path_append(pwd, p);
221                 xfree(p);
222                 return(abs);
223         } else
224                 return(p);
225 }
226
227 static int
228 infer_path(const char *p, char **ifp)
229 {
230         char *cp;
231
232         cp = strrchr(p, '/');
233         if (cp == NULL) {
234                 *ifp = xstrdup(p);
235                 return(0);
236         }
237
238         if (!cp[1]) {
239                 error("Invalid path");
240                 return(-1);
241         }
242
243         *ifp = xstrdup(cp + 1);
244         return(0);
245 }
246
247 static int
248 parse_getput_flags(const char **cpp, int *pflag)
249 {
250         const char *cp = *cpp;
251
252         /* Check for flags */
253         if (cp[0] == '-' && cp[1] && strchr(WHITESPACE, cp[2])) {
254                 switch (cp[1]) {
255                 case 'p':
256                 case 'P':
257                         *pflag = 1;
258                         break;
259                 default:
260                         error("Invalid flag -%c", cp[1]);
261                         return(-1);
262                 }
263                 cp += 2;
264                 *cpp = cp + strspn(cp, WHITESPACE);
265         }
266
267         return(0);
268 }
269
270 static int
271 get_pathname(const char **cpp, char **path)
272 {
273         const char *cp = *cpp, *end;
274         char quot;
275         int i;
276
277         cp += strspn(cp, WHITESPACE);
278         if (!*cp) {
279                 *cpp = cp;
280                 *path = NULL;
281                 return (0);
282         }
283
284         /* Check for quoted filenames */
285         if (*cp == '\"' || *cp == '\'') {
286                 quot = *cp++;
287
288                 end = strchr(cp, quot);
289                 if (end == NULL) {
290                         error("Unterminated quote");
291                         goto fail;
292                 }
293                 if (cp == end) {
294                         error("Empty quotes");
295                         goto fail;
296                 }
297                 *cpp = end + 1 + strspn(end + 1, WHITESPACE);
298         } else {
299                 /* Read to end of filename */
300                 end = strpbrk(cp, WHITESPACE);
301                 if (end == NULL)
302                         end = strchr(cp, '\0');
303                 *cpp = end + strspn(end, WHITESPACE);
304         }
305
306         i = end - cp;
307
308         *path = xmalloc(i + 1);
309         memcpy(*path, cp, i);
310         (*path)[i] = '\0';
311         return(0);
312
313  fail:
314         *path = NULL;
315         return (-1);
316 }
317
318 static int
319 is_dir(char *path)
320 {
321         struct stat sb;
322
323         /* XXX: report errors? */
324         if (stat(path, &sb) == -1)
325                 return(0);
326
327         return(sb.st_mode & S_IFDIR);
328 }
329
330 static int
331 remote_is_dir(int in, int out, char *path)
332 {
333         Attrib *a;
334
335         /* XXX: report errors? */
336         if ((a = do_stat(in, out, path, 1)) == NULL)
337                 return(0);
338         if (!(a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS))
339                 return(0);
340         return(a->perm & S_IFDIR);
341 }
342
343 static int
344 process_get(int in, int out, char *src, char *dst, char *pwd, int pflag)
345 {
346         char *abs_src = NULL;
347         char *abs_dst = NULL;
348         char *tmp;
349         glob_t g;
350         int err = 0;
351         int i;
352
353         abs_src = xstrdup(src);
354         abs_src = make_absolute(abs_src, pwd);
355
356         memset(&g, 0, sizeof(g));
357         debug3("Looking up %s", abs_src);
358         if (remote_glob(in, out, abs_src, 0, NULL, &g)) {
359                 error("File \"%s\" not found.", abs_src);
360                 err = -1;
361                 goto out;
362         }
363
364         /* Only one match, dst may be file, directory or unspecified */
365         if (g.gl_pathv[0] && g.gl_matchc == 1) {
366                 if (dst) {
367                         /* If directory specified, append filename */
368                         if (is_dir(dst)) {
369                                 if (infer_path(g.gl_pathv[0], &tmp)) {
370                                         err = 1;
371                                         goto out;
372                                 }
373                                 abs_dst = path_append(dst, tmp);
374                                 xfree(tmp);
375                         } else
376                                 abs_dst = xstrdup(dst);
377                 } else if (infer_path(g.gl_pathv[0], &abs_dst)) {
378                         err = -1;
379                         goto out;
380                 }
381                 printf("Fetching %s to %s\n", g.gl_pathv[0], abs_dst);
382                 err = do_download(in, out, g.gl_pathv[0], abs_dst, pflag);
383                 goto out;
384         }
385
386         /* Multiple matches, dst may be directory or unspecified */
387         if (dst && !is_dir(dst)) {
388                 error("Multiple files match, but \"%s\" is not a directory",
389                     dst);
390                 err = -1;
391                 goto out;
392         }
393
394         for(i = 0; g.gl_pathv[i]; i++) {
395                 if (infer_path(g.gl_pathv[i], &tmp)) {
396                         err = -1;
397                         goto out;
398                 }
399                 if (dst) {
400                         abs_dst = path_append(dst, tmp);
401                         xfree(tmp);
402                 } else
403                         abs_dst = tmp;
404
405                 printf("Fetching %s to %s\n", g.gl_pathv[i], abs_dst);
406                 if (do_download(in, out, g.gl_pathv[i], abs_dst, pflag) == -1)
407                         err = -1;
408                 xfree(abs_dst);
409                 abs_dst = NULL;
410         }
411
412 out:
413         xfree(abs_src);
414         if (abs_dst)
415                 xfree(abs_dst);
416         globfree(&g);
417         return(err);
418 }
419
420 static int
421 process_put(int in, int out, char *src, char *dst, char *pwd, int pflag)
422 {
423         char *tmp_dst = NULL;
424         char *abs_dst = NULL;
425         char *tmp;
426         glob_t g;
427         int err = 0;
428         int i;
429
430         if (dst) {
431                 tmp_dst = xstrdup(dst);
432                 tmp_dst = make_absolute(tmp_dst, pwd);
433         }
434
435         memset(&g, 0, sizeof(g));
436         debug3("Looking up %s", src);
437         if (glob(src, 0, NULL, &g)) {
438                 error("File \"%s\" not found.", src);
439                 err = -1;
440                 goto out;
441         }
442
443         /* Only one match, dst may be file, directory or unspecified */
444         if (g.gl_pathv[0] && g.gl_matchc == 1) {
445                 if (tmp_dst) {
446                         /* If directory specified, append filename */
447                         if (remote_is_dir(in, out, tmp_dst)) {
448                                 if (infer_path(g.gl_pathv[0], &tmp)) {
449                                         err = 1;
450                                         goto out;
451                                 }
452                                 abs_dst = path_append(tmp_dst, tmp);
453                                 xfree(tmp);
454                         } else
455                                 abs_dst = xstrdup(tmp_dst);
456                 } else {
457                         if (infer_path(g.gl_pathv[0], &abs_dst)) {
458                                 err = -1;
459                                 goto out;
460                         }
461                         abs_dst = make_absolute(abs_dst, pwd);
462                 }
463                 printf("Uploading %s to %s\n", g.gl_pathv[0], abs_dst);
464                 err = do_upload(in, out, g.gl_pathv[0], abs_dst, pflag);
465                 goto out;
466         }
467
468         /* Multiple matches, dst may be directory or unspecified */
469         if (tmp_dst && !remote_is_dir(in, out, tmp_dst)) {
470                 error("Multiple files match, but \"%s\" is not a directory",
471                     tmp_dst);
472                 err = -1;
473                 goto out;
474         }
475
476         for(i = 0; g.gl_pathv[i]; i++) {
477                 if (infer_path(g.gl_pathv[i], &tmp)) {
478                         err = -1;
479                         goto out;
480                 }
481                 if (tmp_dst) {
482                         abs_dst = path_append(tmp_dst, tmp);
483                         xfree(tmp);
484                 } else
485                         abs_dst = make_absolute(tmp, pwd);
486
487                 printf("Uploading %s to %s\n", g.gl_pathv[i], abs_dst);
488                 if (do_upload(in, out, g.gl_pathv[i], abs_dst, pflag) == -1)
489                         err = -1;
490         }
491
492 out:
493         if (abs_dst)
494                 xfree(abs_dst);
495         if (tmp_dst)
496                 xfree(tmp_dst);
497         return(err);
498 }
499
500 static int
501 parse_args(const char **cpp, int *pflag, unsigned long *n_arg,
502     char **path1, char **path2)
503 {
504         const char *cmd, *cp = *cpp;
505         char *cp2;
506         int base = 0;
507         long l;
508         int i, cmdnum;
509
510         /* Skip leading whitespace */
511         cp = cp + strspn(cp, WHITESPACE);
512
513         /* Ignore blank lines */
514         if (!*cp)
515                 return(-1);
516
517         /* Figure out which command we have */
518         for(i = 0; cmds[i].c; i++) {
519                 int cmdlen = strlen(cmds[i].c);
520
521                 /* Check for command followed by whitespace */
522                 if (!strncasecmp(cp, cmds[i].c, cmdlen) &&
523                     strchr(WHITESPACE, cp[cmdlen])) {
524                         cp += cmdlen;
525                         cp = cp + strspn(cp, WHITESPACE);
526                         break;
527                 }
528         }
529         cmdnum = cmds[i].n;
530         cmd = cmds[i].c;
531
532         /* Special case */
533         if (*cp == '!') {
534                 cp++;
535                 cmdnum = I_SHELL;
536         } else if (cmdnum == -1) {
537                 error("Invalid command.");
538                 return(-1);
539         }
540
541         /* Get arguments and parse flags */
542         *pflag = *n_arg = 0;
543         *path1 = *path2 = NULL;
544         switch (cmdnum) {
545         case I_GET:
546         case I_PUT:
547                 if (parse_getput_flags(&cp, pflag))
548                         return(-1);
549                 /* Get first pathname (mandatory) */
550                 if (get_pathname(&cp, path1))
551                         return(-1);
552                 if (*path1 == NULL) {
553                         error("You must specify at least one path after a "
554                             "%s command.", cmd);
555                         return(-1);
556                 }
557                 /* Try to get second pathname (optional) */
558                 if (get_pathname(&cp, path2))
559                         return(-1);
560                 break;
561         case I_RENAME:
562         case I_SYMLINK:
563                 if (get_pathname(&cp, path1))
564                         return(-1);
565                 if (get_pathname(&cp, path2))
566                         return(-1);
567                 if (!*path1 || !*path2) {
568                         error("You must specify two paths after a %s "
569                             "command.", cmd);
570                         return(-1);
571                 }
572                 break;
573         case I_RM:
574         case I_MKDIR:
575         case I_RMDIR:
576         case I_CHDIR:
577         case I_LCHDIR:
578         case I_LMKDIR:
579                 /* Get pathname (mandatory) */
580                 if (get_pathname(&cp, path1))
581                         return(-1);
582                 if (*path1 == NULL) {
583                         error("You must specify a path after a %s command.",
584                             cmd);
585                         return(-1);
586                 }
587                 break;
588         case I_LS:
589                 /* Path is optional */
590                 if (get_pathname(&cp, path1))
591                         return(-1);
592                 break;
593         case I_LLS:
594         case I_SHELL:
595                 /* Uses the rest of the line */
596                 break;
597         case I_LUMASK:
598                 base = 8;
599         case I_CHMOD:
600                 base = 8;
601         case I_CHOWN:
602         case I_CHGRP:
603                 /* Get numeric arg (mandatory) */
604                 l = strtol(cp, &cp2, base);
605                 if (cp2 == cp || ((l == LONG_MIN || l == LONG_MAX) &&
606                     errno == ERANGE) || l < 0) {
607                         error("You must supply a numeric argument "
608                             "to the %s command.", cmd);
609                         return(-1);
610                 }
611                 cp = cp2;
612                 *n_arg = l;
613                 if (cmdnum == I_LUMASK && strchr(WHITESPACE, *cp))
614                         break;
615                 if (cmdnum == I_LUMASK || !strchr(WHITESPACE, *cp)) {
616                         error("You must supply a numeric argument "
617                             "to the %s command.", cmd);
618                         return(-1);
619                 }
620                 cp += strspn(cp, WHITESPACE);
621
622                 /* Get pathname (mandatory) */
623                 if (get_pathname(&cp, path1))
624                         return(-1);
625                 if (*path1 == NULL) {
626                         error("You must specify a path after a %s command.",
627                             cmd);
628                         return(-1);
629                 }
630                 break;
631         case I_QUIT:
632         case I_PWD:
633         case I_LPWD:
634         case I_HELP:
635         case I_VERSION:
636                 break;
637         default:
638                 fatal("Command not implemented");
639         }
640
641         *cpp = cp;
642         return(cmdnum);
643 }
644
645 static int
646 parse_dispatch_command(int in, int out, const char *cmd, char **pwd)
647 {
648         char *path1, *path2, *tmp;
649         int pflag, cmdnum, i;
650         unsigned long n_arg;
651         Attrib a, *aa;
652         char path_buf[MAXPATHLEN];
653         int err = 0;
654         glob_t g;
655
656         path1 = path2 = NULL;
657         cmdnum = parse_args(&cmd, &pflag, &n_arg, &path1, &path2);
658
659         memset(&g, 0, sizeof(g));
660
661         /* Perform command */
662         switch (cmdnum) {
663         case -1:
664                 break;
665         case I_GET:
666                 err = process_get(in, out, path1, path2, *pwd, pflag);
667                 break;
668         case I_PUT:
669                 err = process_put(in, out, path1, path2, *pwd, pflag);
670                 break;
671         case I_RENAME:
672                 path1 = make_absolute(path1, *pwd);
673                 path2 = make_absolute(path2, *pwd);
674                 err = do_rename(in, out, path1, path2);
675                 break;
676         case I_SYMLINK:
677                 if (version < 3) {
678                         error("The server (version %d) does not support "
679                             "this operation", version);
680                         err = -1;
681                 } else {
682                         path2 = make_absolute(path2, *pwd);
683                         err = do_symlink(in, out, path1, path2);
684                 }
685                 break;
686         case I_RM:
687                 path1 = make_absolute(path1, *pwd);
688                 remote_glob(in, out, path1, GLOB_NOCHECK, NULL, &g);
689                 for(i = 0; g.gl_pathv[i]; i++) {
690                         printf("Removing %s\n", g.gl_pathv[i]);
691                         if (do_rm(in, out, g.gl_pathv[i]) == -1)
692                                 err = -1;
693                 }
694                 break;
695         case I_MKDIR:
696                 path1 = make_absolute(path1, *pwd);
697                 attrib_clear(&a);
698                 a.flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
699                 a.perm = 0777;
700                 err = do_mkdir(in, out, path1, &a);
701                 break;
702         case I_RMDIR:
703                 path1 = make_absolute(path1, *pwd);
704                 err = do_rmdir(in, out, path1);
705                 break;
706         case I_CHDIR:
707                 path1 = make_absolute(path1, *pwd);
708                 if ((tmp = do_realpath(in, out, path1)) == NULL) {
709                         err = 1;
710                         break;
711                 }
712                 if ((aa = do_stat(in, out, tmp, 0)) == NULL) {
713                         xfree(tmp);
714                         err = 1;
715                         break;
716                 }
717                 if (!(aa->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)) {
718                         error("Can't change directory: Can't check target");
719                         xfree(tmp);
720                         err = 1;
721                         break;
722                 }
723                 if (!S_ISDIR(aa->perm)) {
724                         error("Can't change directory: \"%s\" is not "
725                             "a directory", tmp);
726                         xfree(tmp);
727                         err = 1;
728                         break;
729                 }
730                 xfree(*pwd);
731                 *pwd = tmp;
732                 break;
733         case I_LS:
734                 if (!path1) {
735                         do_ls(in, out, *pwd);
736                         break;
737                 }
738                 path1 = make_absolute(path1, *pwd);
739                 if ((tmp = do_realpath(in, out, path1)) == NULL)
740                         break;
741                 xfree(path1);
742                 path1 = tmp;
743                 if ((aa = do_stat(in, out, path1, 0)) == NULL)
744                         break;
745                 if ((aa->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
746                     !S_ISDIR(aa->perm)) {
747                         error("Can't ls: \"%s\" is not a directory", path1);
748                         break;
749                 }
750                 do_ls(in, out, path1);
751                 break;
752         case I_LCHDIR:
753                 if (chdir(path1) == -1) {
754                         error("Couldn't change local directory to "
755                             "\"%s\": %s", path1, strerror(errno));
756                         err = 1;
757                 }
758                 break;
759         case I_LMKDIR:
760                 if (mkdir(path1, 0777) == -1) {
761                         error("Couldn't create local directory "
762                             "\"%s\": %s", path1, strerror(errno));
763                         err = 1;
764                 }
765                 break;
766         case I_LLS:
767                 local_do_ls(cmd);
768                 break;
769         case I_SHELL:
770                 local_do_shell(cmd);
771                 break;
772         case I_LUMASK:
773                 umask(n_arg);
774                 printf("Local umask: %03lo\n", n_arg);
775                 break;
776         case I_CHMOD:
777                 path1 = make_absolute(path1, *pwd);
778                 attrib_clear(&a);
779                 a.flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
780                 a.perm = n_arg;
781                 remote_glob(in, out, path1, GLOB_NOCHECK, NULL, &g);
782                 for(i = 0; g.gl_pathv[i]; i++) {
783                         printf("Changing mode on %s\n", g.gl_pathv[i]);
784                         do_setstat(in, out, g.gl_pathv[i], &a);
785                 }
786                 break;
787         case I_CHOWN:
788                 path1 = make_absolute(path1, *pwd);
789                 remote_glob(in, out, path1, GLOB_NOCHECK, NULL, &g);
790                 for(i = 0; g.gl_pathv[i]; i++) {
791                         if (!(aa = do_stat(in, out, g.gl_pathv[i], 0)))
792                                 continue;
793                         if (!(aa->flags & SSH2_FILEXFER_ATTR_UIDGID)) {
794                                 error("Can't get current ownership of "
795                                     "remote file \"%s\"", g.gl_pathv[i]);
796                                 continue;
797                         }
798                         printf("Changing owner on %s\n", g.gl_pathv[i]);
799                         aa->flags &= SSH2_FILEXFER_ATTR_UIDGID;
800                         aa->uid = n_arg;
801                         do_setstat(in, out, g.gl_pathv[i], aa);
802                 }
803                 break;
804         case I_CHGRP:
805                 path1 = make_absolute(path1, *pwd);
806                 remote_glob(in, out, path1, GLOB_NOCHECK, NULL, &g);
807                 for(i = 0; g.gl_pathv[i]; i++) {
808                         if (!(aa = do_stat(in, out, g.gl_pathv[i], 0)))
809                                 continue;
810                         if (!(aa->flags & SSH2_FILEXFER_ATTR_UIDGID)) {
811                                 error("Can't get current ownership of "
812                                     "remote file \"%s\"", g.gl_pathv[i]);
813                                 continue;
814                         }
815                         printf("Changing group on %s\n", g.gl_pathv[i]);
816                         aa->flags &= SSH2_FILEXFER_ATTR_UIDGID;
817                         aa->gid = n_arg;
818                         do_setstat(in, out, g.gl_pathv[i], aa);
819                 }
820                 break;
821         case I_PWD:
822                 printf("Remote working directory: %s\n", *pwd);
823                 break;
824         case I_LPWD:
825                 if (!getcwd(path_buf, sizeof(path_buf)))
826                         error("Couldn't get local cwd: %s",
827                             strerror(errno));
828                 else
829                         printf("Local working directory: %s\n",
830                             path_buf);
831                 break;
832         case I_QUIT:
833                 return(-1);
834         case I_HELP:
835                 help();
836                 break;
837         case I_VERSION:
838                 printf("SFTP protocol version %d\n", version);
839                 break;
840         default:
841                 fatal("%d is not implemented", cmdnum);
842         }
843
844         if (g.gl_pathc)
845                 globfree(&g);
846         if (path1)
847                 xfree(path1);
848         if (path2)
849                 xfree(path2);
850
851         /* If an error occurs in batch mode we should abort. */
852         if (infile != stdin && err > 0)
853                 return -1;
854
855         return(0);
856 }
857
858 void
859 interactive_loop(int fd_in, int fd_out, char *file1, char *file2)
860 {
861         char *pwd;
862         char *dir = NULL;
863         char cmd[2048];
864
865         version = do_init(fd_in, fd_out);
866         if (version == -1)
867                 fatal("Couldn't initialise connection to server");
868
869         pwd = do_realpath(fd_in, fd_out, ".");
870         if (pwd == NULL)
871                 fatal("Need cwd");
872
873         if (file1 != NULL) {
874                 dir = xstrdup(file1);
875                 dir = make_absolute(dir, pwd);
876
877                 if (remote_is_dir(fd_in, fd_out, dir) && file2 == NULL) {
878                         printf("Changing to: %s\n", dir);
879                         snprintf(cmd, sizeof cmd, "cd \"%s\"", dir);
880                         parse_dispatch_command(fd_in, fd_out, cmd, &pwd);
881                 } else {
882                         if (file2 == NULL)
883                                 snprintf(cmd, sizeof cmd, "get %s", dir);
884                         else
885                                 snprintf(cmd, sizeof cmd, "get %s %s", dir,
886                                     file2);
887
888                         parse_dispatch_command(fd_in, fd_out, cmd, &pwd);
889                         return;
890                 }
891         }
892 #if HAVE_SETVBUF
893         setvbuf(stdout, NULL, _IOLBF, 0);
894         setvbuf(infile, NULL, _IOLBF, 0);
895 #else
896         setlinebuf(stdout);
897         setlinebuf(infile);
898 #endif
899
900         for(;;) {
901                 char *cp;
902
903                 printf("sftp> ");
904
905                 /* XXX: use libedit */
906                 if (fgets(cmd, sizeof(cmd), infile) == NULL) {
907                         printf("\n");
908                         break;
909                 } else if (infile != stdin) /* Bluff typing */
910                         printf("%s", cmd);
911
912                 cp = strrchr(cmd, '\n');
913                 if (cp)
914                         *cp = '\0';
915
916                 if (parse_dispatch_command(fd_in, fd_out, cmd, &pwd))
917                         break;
918         }
919         xfree(pwd);
920 }
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