635 lines
14 KiB
C
635 lines
14 KiB
C
/*
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* Copyright (c) 2001 Damien Miller. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* XXX: finish implementation of all commands */
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/* XXX: do fnmatch() instead of using raw pathname */
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/* XXX: globbed ls */
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/* XXX: recursive operations */
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#include "includes.h"
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RCSID("$OpenBSD: sftp-int.c,v 1.22 2001/02/14 09:46:03 djm Exp $");
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#include "buffer.h"
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#include "xmalloc.h"
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#include "log.h"
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#include "pathnames.h"
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#include "sftp.h"
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#include "sftp-common.h"
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#include "sftp-client.h"
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#include "sftp-int.h"
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/* Seperators for interactive commands */
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#define WHITESPACE " \t\r\n"
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/* Commands for interactive mode */
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#define I_CHDIR 1
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#define I_CHGRP 2
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#define I_CHMOD 3
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#define I_CHOWN 4
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#define I_GET 5
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#define I_HELP 6
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#define I_LCHDIR 7
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#define I_LLS 8
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#define I_LMKDIR 9
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#define I_LPWD 10
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#define I_LS 11
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#define I_LUMASK 12
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#define I_MKDIR 13
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#define I_PUT 14
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#define I_PWD 15
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#define I_QUIT 16
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#define I_RENAME 17
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#define I_RM 18
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#define I_RMDIR 19
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#define I_SHELL 20
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struct CMD {
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const char *c;
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const int n;
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};
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const struct CMD cmds[] = {
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{ "cd", I_CHDIR },
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{ "chdir", I_CHDIR },
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{ "chgrp", I_CHGRP },
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{ "chmod", I_CHMOD },
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{ "chown", I_CHOWN },
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{ "dir", I_LS },
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{ "exit", I_QUIT },
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{ "get", I_GET },
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{ "help", I_HELP },
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{ "lcd", I_LCHDIR },
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{ "lchdir", I_LCHDIR },
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{ "lls", I_LLS },
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{ "lmkdir", I_LMKDIR },
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{ "lpwd", I_LPWD },
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{ "ls", I_LS },
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{ "lumask", I_LUMASK },
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{ "mkdir", I_MKDIR },
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{ "put", I_PUT },
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{ "pwd", I_PWD },
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{ "quit", I_QUIT },
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{ "rename", I_RENAME },
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{ "rm", I_RM },
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{ "rmdir", I_RMDIR },
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{ "!", I_SHELL },
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{ "?", I_HELP },
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{ NULL, -1}
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};
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static void
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help(void)
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{
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printf("Available commands:\n");
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printf("cd path Change remote directory to 'path'\n");
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printf("lcd path Change local directory to 'path'\n");
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printf("chgrp grp path Change group of file 'path' to 'grp'\n");
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printf("chmod mode path Change permissions of file 'path' to 'mode'\n");
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printf("chown own path Change owner of file 'path' to 'own'\n");
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printf("help Display this help text\n");
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printf("get remote-path [local-path] Download file\n");
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printf("lls [ls-options [path]] Display local directory listing\n");
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printf("lmkdir path Create local directory\n");
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printf("lpwd Print local working directory\n");
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printf("ls [path] Display remote directory listing\n");
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printf("lumask umask Set local umask to 'umask'\n");
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printf("mkdir path Create remote directory\n");
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printf("put local-path [remote-path] Upload file\n");
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printf("pwd Display remote working directory\n");
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printf("exit Quit sftp\n");
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printf("quit Quit sftp\n");
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printf("rename oldpath newpath Rename remote file\n");
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printf("rmdir path Remove remote directory\n");
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printf("rm path Delete remote file\n");
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printf("!command Execute 'command' in local shell\n");
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printf("! Escape to local shell\n");
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printf("? Synonym for help\n");
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}
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static void
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local_do_shell(const char *args)
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{
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int ret, status;
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char *shell;
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pid_t pid;
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if (!*args)
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args = NULL;
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if ((shell = getenv("SHELL")) == NULL)
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shell = _PATH_BSHELL;
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if ((pid = fork()) == -1)
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fatal("Couldn't fork: %s", strerror(errno));
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if (pid == 0) {
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/* XXX: child has pipe fds to ssh subproc open - issue? */
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if (args) {
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debug3("Executing %s -c \"%s\"", shell, args);
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ret = execl(shell, shell, "-c", args, NULL);
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} else {
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debug3("Executing %s", shell);
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ret = execl(shell, shell, NULL);
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}
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fprintf(stderr, "Couldn't execute \"%s\": %s\n", shell,
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strerror(errno));
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_exit(1);
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}
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if (waitpid(pid, &status, 0) == -1)
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fatal("Couldn't wait for child: %s", strerror(errno));
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if (!WIFEXITED(status))
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error("Shell exited abormally");
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else if (WEXITSTATUS(status))
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error("Shell exited with status %d", WEXITSTATUS(status));
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}
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static void
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local_do_ls(const char *args)
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{
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if (!args || !*args)
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local_do_shell(_PATH_LS);
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else {
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int len = strlen(_PATH_LS " ") + strlen(args) + 1;
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char *buf = xmalloc(len);
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/* XXX: quoting - rip quoting code from ftp? */
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snprintf(buf, len, _PATH_LS " %s", args);
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local_do_shell(buf);
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xfree(buf);
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}
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}
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static char *
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make_absolute(char *p, char *pwd)
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{
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char buf[2048];
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/* Derelativise */
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if (p && p[0] != '/') {
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snprintf(buf, sizeof(buf), "%s/%s", pwd, p);
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xfree(p);
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p = xstrdup(buf);
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}
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return(p);
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}
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static int
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parse_getput_flags(const char **cpp, int *pflag)
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{
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const char *cp = *cpp;
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/* Check for flags */
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if (cp[0] == '-' && cp[1] && strchr(WHITESPACE, cp[2])) {
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switch (cp[1]) {
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case 'p':
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case 'P':
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*pflag = 1;
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break;
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default:
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error("Invalid flag -%c", cp[1]);
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return(-1);
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}
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cp += 2;
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*cpp = cp + strspn(cp, WHITESPACE);
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}
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return(0);
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}
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static int
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get_pathname(const char **cpp, char **path)
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{
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const char *cp = *cpp, *end;
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char quot;
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int i;
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cp += strspn(cp, WHITESPACE);
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if (!*cp) {
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*cpp = cp;
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*path = NULL;
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return (0);
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}
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/* Check for quoted filenames */
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if (*cp == '\"' || *cp == '\'') {
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quot = *cp++;
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end = strchr(cp, quot);
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if (end == NULL) {
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error("Unterminated quote");
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goto fail;
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}
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if (cp == end) {
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error("Empty quotes");
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goto fail;
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}
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*cpp = end + 1 + strspn(end + 1, WHITESPACE);
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} else {
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/* Read to end of filename */
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end = strpbrk(cp, WHITESPACE);
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if (end == NULL)
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end = strchr(cp, '\0');
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*cpp = end + strspn(end, WHITESPACE);
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}
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i = end - cp;
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*path = xmalloc(i + 1);
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memcpy(*path, cp, i);
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(*path)[i] = '\0';
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return(0);
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fail:
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*path = NULL;
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return (-1);
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}
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static int
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infer_path(const char *p, char **ifp)
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{
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char *cp;
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debug("XXX: P = \"%s\"", p);
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cp = strrchr(p, '/');
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if (cp == NULL) {
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*ifp = xstrdup(p);
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return(0);
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}
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if (!cp[1]) {
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error("Invalid path");
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return(-1);
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}
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*ifp = xstrdup(cp + 1);
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return(0);
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}
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static int
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parse_args(const char **cpp, int *pflag, unsigned long *n_arg,
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char **path1, char **path2)
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{
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const char *cmd, *cp = *cpp;
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char *cp2;
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int base = 0;
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long l;
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int i, cmdnum;
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/* Skip leading whitespace */
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cp = cp + strspn(cp, WHITESPACE);
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/* Ignore blank lines */
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if (!*cp)
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return(-1);
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/* Figure out which command we have */
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for(i = 0; cmds[i].c; i++) {
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int cmdlen = strlen(cmds[i].c);
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/* Check for command followed by whitespace */
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if (!strncasecmp(cp, cmds[i].c, cmdlen) &&
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strchr(WHITESPACE, cp[cmdlen])) {
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cp += cmdlen;
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cp = cp + strspn(cp, WHITESPACE);
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break;
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}
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}
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cmdnum = cmds[i].n;
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cmd = cmds[i].c;
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/* Special case */
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if (*cp == '!') {
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cp++;
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cmdnum = I_SHELL;
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} else if (cmdnum == -1) {
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error("Invalid command.");
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return(-1);
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}
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/* Get arguments and parse flags */
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*pflag = *n_arg = 0;
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*path1 = *path2 = NULL;
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switch (cmdnum) {
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case I_GET:
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case I_PUT:
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if (parse_getput_flags(&cp, pflag))
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return(-1);
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/* Get first pathname (mandatory) */
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if (get_pathname(&cp, path1))
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return(-1);
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if (*path1 == NULL) {
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error("You must specify at least one path after a "
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"%s command.", cmd);
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return(-1);
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}
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/* Try to get second pathname (optional) */
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if (get_pathname(&cp, path2))
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return(-1);
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/* Otherwise try to guess it from first path */
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if (*path2 == NULL && infer_path(*path1, path2))
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return(-1);
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break;
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case I_RENAME:
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/* Get first pathname (mandatory) */
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if (get_pathname(&cp, path1))
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return(-1);
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if (get_pathname(&cp, path2))
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return(-1);
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if (!*path1 || !*path2) {
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error("You must specify two paths after a %s "
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"command.", cmd);
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return(-1);
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}
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break;
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case I_RM:
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case I_MKDIR:
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case I_RMDIR:
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case I_CHDIR:
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case I_LCHDIR:
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case I_LMKDIR:
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/* Get pathname (mandatory) */
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if (get_pathname(&cp, path1))
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return(-1);
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if (*path1 == NULL) {
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error("You must specify a path after a %s command.",
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cmd);
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return(-1);
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}
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break;
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case I_LS:
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/* Path is optional */
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if (get_pathname(&cp, path1))
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return(-1);
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break;
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case I_LLS:
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case I_SHELL:
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/* Uses the rest of the line */
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break;
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case I_LUMASK:
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base = 8;
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case I_CHMOD:
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base = 8;
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case I_CHOWN:
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case I_CHGRP:
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/* Get numeric arg (mandatory) */
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l = strtol(cp, &cp2, base);
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if (cp2 == cp || ((l == LONG_MIN || l == LONG_MAX) &&
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errno == ERANGE) || l < 0) {
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error("You must supply a numeric argument "
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"to the %s command.", cmd);
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return(-1);
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}
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cp = cp2;
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*n_arg = l;
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if (cmdnum == I_LUMASK && strchr(WHITESPACE, *cp))
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break;
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if (cmdnum == I_LUMASK || !strchr(WHITESPACE, *cp)) {
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error("You must supply a numeric argument "
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"to the %s command.", cmd);
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return(-1);
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}
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cp += strspn(cp, WHITESPACE);
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/* Get pathname (mandatory) */
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if (get_pathname(&cp, path1))
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return(-1);
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if (*path1 == NULL) {
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error("You must specify a path after a %s command.",
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cmd);
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return(-1);
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}
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break;
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case I_QUIT:
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case I_PWD:
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case I_LPWD:
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case I_HELP:
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break;
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default:
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fatal("Command not implemented");
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}
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*cpp = cp;
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return(cmdnum);
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}
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static int
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parse_dispatch_command(int in, int out, const char *cmd, char **pwd)
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{
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char *path1, *path2, *tmp;
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int pflag, cmdnum;
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unsigned long n_arg;
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Attrib a, *aa;
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char path_buf[PATH_MAX];
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path1 = path2 = NULL;
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cmdnum = parse_args(&cmd, &pflag, &n_arg, &path1, &path2);
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/* Perform command */
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switch (cmdnum) {
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case -1:
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break;
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case I_GET:
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path1 = make_absolute(path1, *pwd);
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do_download(in, out, path1, path2, pflag);
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break;
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case I_PUT:
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path2 = make_absolute(path2, *pwd);
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do_upload(in, out, path1, path2, pflag);
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break;
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case I_RENAME:
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path1 = make_absolute(path1, *pwd);
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path2 = make_absolute(path2, *pwd);
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do_rename(in, out, path1, path2);
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break;
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case I_RM:
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path1 = make_absolute(path1, *pwd);
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do_rm(in, out, path1);
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break;
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case I_MKDIR:
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path1 = make_absolute(path1, *pwd);
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attrib_clear(&a);
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a.flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
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a.perm = 0777;
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do_mkdir(in, out, path1, &a);
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break;
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case I_RMDIR:
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path1 = make_absolute(path1, *pwd);
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do_rmdir(in, out, path1);
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break;
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case I_CHDIR:
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path1 = make_absolute(path1, *pwd);
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if ((tmp = do_realpath(in, out, path1)) == NULL)
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break;
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if ((aa = do_stat(in, out, tmp)) == NULL) {
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xfree(tmp);
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break;
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}
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if (!(aa->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)) {
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error("Can't change directory: Can't check target");
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xfree(tmp);
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break;
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}
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if (!S_ISDIR(aa->perm)) {
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error("Can't change directory: \"%s\" is not "
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"a directory", tmp);
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xfree(tmp);
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break;
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}
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xfree(*pwd);
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*pwd = tmp;
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break;
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case I_LS:
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if (!path1) {
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do_ls(in, out, *pwd);
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break;
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}
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path1 = make_absolute(path1, *pwd);
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if ((tmp = do_realpath(in, out, path1)) == NULL)
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break;
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xfree(path1);
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path1 = tmp;
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if ((aa = do_stat(in, out, path1)) == NULL)
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break;
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if ((aa->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
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!S_ISDIR(aa->perm)) {
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error("Can't ls: \"%s\" is not a directory", path1);
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break;
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}
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do_ls(in, out, path1);
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break;
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case I_LCHDIR:
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if (chdir(path1) == -1)
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error("Couldn't change local directory to "
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"\"%s\": %s", path1, strerror(errno));
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break;
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case I_LMKDIR:
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if (mkdir(path1, 0777) == -1)
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error("Couldn't create local directory "
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"\"%s\": %s", path1, strerror(errno));
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break;
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case I_LLS:
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local_do_ls(cmd);
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break;
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case I_SHELL:
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local_do_shell(cmd);
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break;
|
|
case I_LUMASK:
|
|
umask(n_arg);
|
|
printf("Local umask: %03lo\n", n_arg);
|
|
break;
|
|
case I_CHMOD:
|
|
path1 = make_absolute(path1, *pwd);
|
|
attrib_clear(&a);
|
|
a.flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
|
|
a.perm = n_arg;
|
|
do_setstat(in, out, path1, &a);
|
|
break;
|
|
case I_CHOWN:
|
|
path1 = make_absolute(path1, *pwd);
|
|
if (!(aa = do_stat(in, out, path1)))
|
|
break;
|
|
if (!(aa->flags & SSH2_FILEXFER_ATTR_UIDGID)) {
|
|
error("Can't get current ownership of "
|
|
"remote file \"%s\"", path1);
|
|
break;
|
|
}
|
|
aa->flags &= SSH2_FILEXFER_ATTR_UIDGID;
|
|
aa->uid = n_arg;
|
|
do_setstat(in, out, path1, aa);
|
|
break;
|
|
case I_CHGRP:
|
|
path1 = make_absolute(path1, *pwd);
|
|
if (!(aa = do_stat(in, out, path1)))
|
|
break;
|
|
if (!(aa->flags & SSH2_FILEXFER_ATTR_UIDGID)) {
|
|
error("Can't get current ownership of "
|
|
"remote file \"%s\"", path1);
|
|
break;
|
|
}
|
|
aa->flags &= SSH2_FILEXFER_ATTR_UIDGID;
|
|
aa->gid = n_arg;
|
|
do_setstat(in, out, path1, aa);
|
|
break;
|
|
case I_PWD:
|
|
printf("Remote working directory: %s\n", *pwd);
|
|
break;
|
|
case I_LPWD:
|
|
if (!getcwd(path_buf, sizeof(path_buf)))
|
|
error("Couldn't get local cwd: %s\n",
|
|
strerror(errno));
|
|
else
|
|
printf("Local working directory: %s\n",
|
|
path_buf);
|
|
break;
|
|
case I_QUIT:
|
|
return(-1);
|
|
case I_HELP:
|
|
help();
|
|
break;
|
|
default:
|
|
fatal("%d is not implemented", cmdnum);
|
|
}
|
|
|
|
if (path1)
|
|
xfree(path1);
|
|
if (path2)
|
|
xfree(path2);
|
|
return(0);
|
|
}
|
|
|
|
void
|
|
interactive_loop(int fd_in, int fd_out)
|
|
{
|
|
char *pwd;
|
|
char cmd[2048];
|
|
|
|
pwd = do_realpath(fd_in, fd_out, ".");
|
|
if (pwd == NULL)
|
|
fatal("Need cwd");
|
|
|
|
setvbuf(stdout, NULL, _IOLBF, 0);
|
|
setvbuf(stdin, NULL, _IOLBF, 0);
|
|
|
|
for(;;) {
|
|
char *cp;
|
|
|
|
printf("sftp> ");
|
|
|
|
/* XXX: use libedit */
|
|
if (fgets(cmd, sizeof(cmd), stdin) == NULL) {
|
|
printf("\n");
|
|
break;
|
|
}
|
|
cp = strrchr(cmd, '\n');
|
|
if (cp)
|
|
*cp = '\0';
|
|
if (parse_dispatch_command(fd_in, fd_out, cmd, &pwd))
|
|
break;
|
|
}
|
|
xfree(pwd);
|
|
}
|