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authorDamien Miller <djm@mindrot.org>2001-02-04 23:20:18 +1100
committerDamien Miller <djm@mindrot.org>2001-02-04 23:20:18 +1100
commit33804263583e82fb7e6e36477fe63ebd14f15ecb (patch)
tree90d891bedf231b49acdd91f456d58a4142070bd6 /sftp-int.c
parent45cb2937bc8a74c1e1f7da3b35ad4319d3033baf (diff)
NB: big update - may break stuff. Please test!
- (djm) OpenBSD CVS sync: - markus@cvs.openbsd.org 2001/02/03 03:08:38 [auth-options.c auth-rh-rsa.c auth-rhosts.c auth.c canohost.c] [canohost.h servconf.c servconf.h session.c sshconnect1.c sshd.8] [sshd_config] make ReverseMappingCheck optional in sshd_config; ok djm@,dugsong@ - markus@cvs.openbsd.org 2001/02/03 03:19:51 [ssh.1 sshd.8 sshd_config] Skey is now called ChallengeResponse - markus@cvs.openbsd.org 2001/02/03 03:43:09 [sshd.8] use no-pty option in .ssh/authorized_keys* if you need a 8-bit clean channel. note from Erik.Anggard@cygate.se (pr/1659) - stevesk@cvs.openbsd.org 2001/02/03 10:03:06 [ssh.1] typos; ok markus@ - djm@cvs.openbsd.org 2001/02/04 04:11:56 [scp.1 sftp-server.c ssh.1 sshd.8 sftp-client.c sftp-client.h] [sftp-common.c sftp-common.h sftp-int.c sftp-int.h sftp.1 sftp.c] Basic interactive sftp client; ok theo@ - (djm) Update RPM specs for new sftp binary - (djm) Update several bits for new optional reverse lookup stuff. I think I got them all.
Diffstat (limited to 'sftp-int.c')
-rw-r--r--sftp-int.c583
1 files changed, 583 insertions, 0 deletions
diff --git a/sftp-int.c b/sftp-int.c
new file mode 100644
index 00000000..f050c098
--- /dev/null
+++ b/sftp-int.c
@@ -0,0 +1,583 @@
+/*
+ * Copyright (c) 2001 Damien Miller. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* XXX: finish implementation of all commands */
+/* XXX: do fnmatch() instead of using raw pathname */
+/* XXX: recursive operations */
+
+#include "includes.h"
+RCSID("$OpenBSD: sftp-int.c,v 1.1 2001/02/04 11:11:54 djm Exp $");
+
+#include "buffer.h"
+#include "xmalloc.h"
+#include "log.h"
+#include "pathnames.h"
+
+#include "sftp.h"
+#include "sftp-common.h"
+#include "sftp-client.h"
+#include "sftp-int.h"
+
+/* Seperators for interactive commands */
+#define WHITESPACE " \t\r\n"
+
+/* Commands for interactive mode */
+#define I_CHDIR 1
+#define I_CHGRP 2
+#define I_CHMOD 3
+#define I_CHOWN 4
+#define I_GET 5
+#define I_HELP 6
+#define I_LCHDIR 7
+#define I_LLS 8
+#define I_LMKDIR 9
+#define I_LPWD 10
+#define I_LS 11
+#define I_LUMASK 12
+#define I_MKDIR 13
+#define I_PUT 14
+#define I_PWD 15
+#define I_QUIT 16
+#define I_RENAME 17
+#define I_RM 18
+#define I_RMDIR 19
+#define I_SHELL 20
+
+struct CMD {
+ const int n;
+ const char *c;
+};
+
+const struct CMD cmds[] = {
+ { I_CHDIR, "CD" },
+ { I_CHDIR, "CHDIR" },
+ { I_CHDIR, "LCD" },
+ { I_CHGRP, "CHGRP" },
+ { I_CHMOD, "CHMOD" },
+ { I_CHOWN, "CHOWN" },
+ { I_HELP, "HELP" },
+ { I_GET, "GET" },
+ { I_LCHDIR, "LCHDIR" },
+ { I_LLS, "LLS" },
+ { I_LMKDIR, "LMKDIR" },
+ { I_LPWD, "LPWD" },
+ { I_LS, "LS" },
+ { I_LUMASK, "LUMASK" },
+ { I_MKDIR, "MKDIR" },
+ { I_PUT, "PUT" },
+ { I_PWD, "PWD" },
+ { I_QUIT, "EXIT" },
+ { I_QUIT, "QUIT" },
+ { I_RENAME, "RENAME" },
+ { I_RMDIR, "RMDIR" },
+ { I_RM, "RM" },
+ { I_SHELL, "!" },
+ { -1, NULL}
+};
+
+void
+help(void)
+{
+ printf("Available commands:\n");
+ printf("CD path Change remote directory to 'path'\n");
+ printf("LCD path Change local directory to 'path'\n");
+ printf("CHGRP grp path Change group of file 'path' to 'grp'\n");
+ printf("CHMOD mode path Change permissions of file 'path' to 'mode'\n");
+ printf("CHOWN own path Change owner of file 'path' to 'own'\n");
+ printf("HELP Display this help text\n");
+ printf("GET remote-path [local-path] Download file\n");
+ printf("LLS [ls options] [path] Display local directory listing\n");
+ printf("LMKDIR path Create local directory\n");
+ printf("LPWD Print local working directory\n");
+ printf("LS [path] Display remote directory listing\n");
+ printf("LUMASK umask Set local umask to 'umask'\n");
+ printf("MKDIR path Create remote directory\n");
+ printf("PUT local-path [remote-path] Upload file\n");
+ printf("PWD Display remote working directory\n");
+ printf("EXIT Quit sftp\n");
+ printf("QUIT Quit sftp\n");
+ printf("RENAME oldpath newpath Rename remote file\n");
+ printf("RMDIR path Remove remote directory\n");
+ printf("RM path Delete remote file\n");
+ printf("!command Execute 'command' in local shell\n");
+ printf("! Escape to local shell\n");
+}
+
+void
+local_do_shell(const char *args)
+{
+ int ret, status;
+ char *shell;
+ pid_t pid;
+
+ if (!*args)
+ args = NULL;
+
+ if ((shell = getenv("SHELL")) == NULL)
+ shell = _PATH_BSHELL;
+
+ if ((pid = fork()) == -1)
+ fatal("Couldn't fork: %s", strerror(errno));
+
+ if (pid == 0) {
+ /* XXX: child has pipe fds to ssh subproc open - issue? */
+ if (args) {
+ debug3("Executing %s -c \"%s\"", shell, args);
+ ret = execl(shell, shell, "-c", args, NULL);
+ } else {
+ debug3("Executing %s", shell);
+ ret = execl(shell, shell, NULL);
+ }
+ fprintf(stderr, "Couldn't execute \"%s\": %s\n", shell,
+ strerror(errno));
+ _exit(1);
+ }
+ if (waitpid(pid, &status, 0) == -1)
+ fatal("Couldn't wait for child: %s", strerror(errno));
+ if (!WIFEXITED(status))
+ error("Shell exited abormally");
+ else if (WEXITSTATUS(status))
+ error("Shell exited with status %d", WEXITSTATUS(status));
+}
+
+void
+local_do_ls(const char *args)
+{
+ if (!args || !*args)
+ local_do_shell("ls");
+ else {
+ char *buf = xmalloc(8 + strlen(args) + 1);
+
+ /* XXX: quoting - rip quoting code from ftp? */
+ sprintf(buf, "/bin/ls %s", args);
+ local_do_shell(buf);
+ }
+}
+
+char *
+make_absolute(char *p, char *pwd)
+{
+ char buf[2048];
+
+ /* Derelativise */
+ if (p && p[0] != '/') {
+ snprintf(buf, sizeof(buf), "%s/%s", pwd, p);
+ xfree(p);
+ p = xstrdup(buf);
+ }
+
+ return(p);
+}
+
+int
+parse_getput_flags(const char **cpp, int *pflag)
+{
+ const char *cp = *cpp;
+
+ /* Check for flags */
+ if (cp[0] == '-' && cp[1] && strchr(WHITESPACE, cp[2])) {
+ switch (*cp) {
+ case 'P':
+ *pflag = 1;
+ break;
+ default:
+ error("Invalid flag -%c", *cp);
+ return(-1);
+ }
+ cp += 2;
+ *cpp = cp + strspn(cp, WHITESPACE);
+ }
+
+ return(0);
+}
+
+int
+get_pathname(const char **cpp, char **path)
+{
+ const char *quot, *cp = *cpp;
+ int i;
+
+ cp += strspn(cp, WHITESPACE);
+ if (!*cp) {
+ *cpp = cp;
+ *path = NULL;
+ return(0);
+ }
+
+ /* Check for quoted filenames */
+ if (*cp == '\"' || *cp == '\'') {
+ quot = cp++;
+ for(i = 0; cp[i] && cp[i] != *quot; i++)
+ ;
+ if (!cp[i]) {
+ error("Unterminated quote");
+ *path = NULL;
+ return(-1);
+ }
+ if (i == 0) {
+ error("Empty quotes");
+ *path = NULL;
+ return(-1);
+ }
+ *path = xmalloc(i + 1);
+ memcpy(*path, cp, i);
+ (*path)[i] = '\0';
+ cp += i + 1;
+ *cpp = cp + strspn(cp, WHITESPACE);
+ return(0);
+ }
+
+ /* Read to end of filename */
+ for(i = 0; cp[i] && cp[i] != ' '; i++)
+ ;
+
+ *path = xmalloc(i + 1);
+ memcpy(*path, cp, i);
+ (*path)[i] = '\0';
+ cp += i;
+ *cpp = cp + strspn(cp, WHITESPACE);
+
+ return(0);
+}
+
+int
+infer_path(const char *p, char **ifp)
+{
+ char *cp;
+
+ debug("XXX: P = \"%s\"", p);
+
+ cp = strrchr(p, '/');
+
+ if (cp == NULL) {
+ *ifp = xstrdup(p);
+ return(0);
+ }
+
+ if (!cp[1]) {
+ error("Invalid path");
+ return(-1);
+ }
+
+ *ifp = xstrdup(cp + 1);
+ return(0);
+}
+
+int
+parse_args(const char **cpp, int *pflag, unsigned long *n_arg,
+ char **path1, char **path2)
+{
+ const char *cmd, *cp = *cpp;
+ int i, cmdnum;
+
+ /* Skip leading whitespace */
+ cp = cp + strspn(cp, WHITESPACE);
+
+ /* Ignore blank lines */
+ if (!*cp)
+ return(-1);
+
+ /* Figure out which command we have */
+ for(i = 0; cmds[i].c; i++) {
+ int cmdlen = strlen(cmds[i].c);
+
+ /* Check for command followed by whitespace */
+ if (!strncasecmp(cp, cmds[i].c, cmdlen) &&
+ strchr(WHITESPACE, cp[cmdlen])) {
+ cp += cmdlen;
+ cp = cp + strspn(cp, WHITESPACE);
+ break;
+ }
+ }
+ cmdnum = cmds[i].n;
+ cmd = cmds[i].c;
+
+ /* Special case */
+ if (*cp == '!') {
+ cp++;
+ cmdnum = I_SHELL;
+ } else if (cmdnum == -1) {
+ error("Invalid command.");
+ return(-1);
+ }
+
+ /* Get arguments and parse flags */
+ *pflag = *n_arg = 0;
+ *path1 = *path2 = NULL;
+ switch (cmdnum) {
+ case I_GET:
+ case I_PUT:
+ if (parse_getput_flags(&cp, pflag))
+ return(-1);
+ /* Get first pathname (mandatory) */
+ if (get_pathname(&cp, path1))
+ return(-1);
+ if (*path1 == NULL) {
+ error("You must specify at least one path after a "
+ "%s command.", cmd);
+ return(-1);
+ }
+ /* Try to get second pathname (optional) */
+ if (get_pathname(&cp, path2))
+ return(-1);
+ /* Otherwise try to guess it from first path */
+ if (*path2 == NULL && infer_path(*path1, path2))
+ return(-1);
+ break;
+ case I_RENAME:
+ /* Get first pathname (mandatory) */
+ if (get_pathname(&cp, path1))
+ return(-1);
+ if (get_pathname(&cp, path2))
+ return(-1);
+ if (!*path1 || !*path2) {
+ error("You must specify two paths after a %s "
+ "command.", cmd);
+ return(-1);
+ }
+ break;
+ case I_RM:
+ case I_MKDIR:
+ case I_RMDIR:
+ case I_CHDIR:
+ case I_LCHDIR:
+ case I_LMKDIR:
+ /* Get pathname (mandatory) */
+ if (get_pathname(&cp, path1))
+ return(-1);
+ if (*path1 == NULL) {
+ error("You must specify a path after a %s command.",
+ cmd);
+ return(-1);
+ }
+ break;
+ case I_LS:
+ /* Path is optional */
+ if (get_pathname(&cp, path1))
+ return(-1);
+ break;
+ case I_LLS:
+ case I_SHELL:
+ /* Uses the rest of the line */
+ break;
+ case I_LUMASK:
+ case I_CHMOD:
+ case I_CHOWN:
+ case I_CHGRP:
+ /* Get numeric arg (mandatory) */
+ if (*cp < '0' && *cp > '9') {
+ error("You must supply a numeric argument "
+ "to the %s command.", cmd);
+ return(-1);
+ }
+ *n_arg = strtoul(cp, (char**)&cp, 0);
+ if (!*cp || !strchr(WHITESPACE, *cp)) {
+ error("You must supply a numeric argument "
+ "to the %s command.", cmd);
+ return(-1);
+ }
+ cp += strspn(cp, WHITESPACE);
+
+ /* Get pathname (mandatory) */
+ if (get_pathname(&cp, path1))
+ return(-1);
+ if (*path1 == NULL) {
+ error("You must specify a path after a %s command.",
+ cmd);
+ return(-1);
+ }
+ break;
+ case I_QUIT:
+ case I_PWD:
+ case I_LPWD:
+ case I_HELP:
+ break;
+ default:
+ fatal("Command not implemented");
+ }
+
+ *cpp = cp;
+
+ return(cmdnum);
+}
+
+int
+parse_dispatch_command(int in, int out, const char *cmd, char **pwd)
+{
+ char *path1, *path2;
+ int pflag, cmdnum;
+ unsigned long n_arg;
+ Attrib a, *aa;
+ char path_buf[PATH_MAX];
+
+ path1 = path2 = NULL;
+ cmdnum = parse_args(&cmd, &pflag, &n_arg, &path1, &path2);
+
+ /* Perform command */
+ switch (cmdnum) {
+ case -1:
+ break;
+ case I_GET:
+ path1 = make_absolute(path1, *pwd);
+ do_download(in, out, path1, path2, pflag);
+ break;
+ case I_PUT:
+ path2 = make_absolute(path2, *pwd);
+ do_upload(in, out, path1, path2, pflag);
+ break;
+ case I_RENAME:
+ path1 = make_absolute(path1, *pwd);
+ path2 = make_absolute(path2, *pwd);
+ do_rename(in, out, path1, path2);
+ break;
+ case I_RM:
+ path1 = make_absolute(path1, *pwd);
+ do_rm(in, out, path1);
+ break;
+ case I_MKDIR:
+ path1 = make_absolute(path1, *pwd);
+ attrib_clear(&a);
+ a.flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
+ a.perm = 0777;
+ do_mkdir(in, out, path1, &a);
+ break;
+ case I_RMDIR:
+ path1 = make_absolute(path1, *pwd);
+ do_rmdir(in, out, path1);
+ break;
+ case I_CHDIR:
+ path1 = make_absolute(path1, *pwd);
+ xfree(*pwd);
+ *pwd = do_realpath(in, out, path1);
+ break;
+ case I_LS:
+ path1 = make_absolute(path1, *pwd);
+ do_ls(in, out, path1?path1:*pwd);
+ break;
+ case I_LCHDIR:
+ if (chdir(path1) == -1)
+ error("Couldn't change local directory to "
+ "\"%s\": %s", path1, strerror(errno));
+ break;
+ case I_LMKDIR:
+ if (mkdir(path1, 0777) == -1)
+ error("Couldn't create local directory to "
+ "\"%s\": %s", path1, strerror(errno));
+ break;
+ case I_LLS:
+ local_do_ls(cmd);
+ break;
+ case I_SHELL:
+ local_do_shell(cmd);
+ break;
+ case I_LUMASK:
+ umask(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);
+ case I_CHOWN:
+ path1 = make_absolute(path1, *pwd);
+ aa = do_stat(in, out, path1);
+ if (!aa->flags & SSH2_FILEXFER_ATTR_UIDGID) {
+ error("Can't get current ownership of "
+ "remote file \"%s\"", path1);
+ break;
+ }
+ aa->uid = n_arg;
+ do_setstat(in, out, path1, aa);
+ break;
+ case I_CHGRP:
+ path1 = make_absolute(path1, *pwd);
+ aa = do_stat(in, out, path1);
+ if (!aa->flags & SSH2_FILEXFER_ATTR_UIDGID) {
+ error("Can't get current ownership of "
+ "remote file \"%s\"", path1);
+ break;
+ }
+ 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");
+
+ setlinebuf(stdout);
+ setlinebuf(stdin);
+
+ 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);
+}