/*
- * $Id: $
- *
* Across-the-wire migration utility for Citadel
*
- * Copyright (c) 2009 citadel.org
+ * Yes, we used goto, and gets(), and committed all sorts of other heinous sins here.
+ * The scope of this program isn't wide enough to make a difference. If you don't like
+ * it you can rewrite it.
+ *
+ * Copyright (c) 2009-2021 citadel.org
+ *
+ * This program is open source software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3.
*
- * This program is licensed to you under the terms of the GNU General Public License v3
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * (Note: a useful future enhancement might be to support "-h" on both sides)
*
*/
#include <limits.h>
#include <pwd.h>
#include <time.h>
+#include <sys/socket.h>
+#include <sys/un.h>
#include <libcitadel.h>
#include "citadel.h"
#include "axdefs.h"
#include "sysdep.h"
#include "config.h"
#include "citadel_dirs.h"
-#if HAVE_BACKTRACE
-#include <execinfo.h>
-#endif
+/*
+ * Replacement for gets() that doesn't throw a compiler warning.
+ * We're only using it for some simple prompts, so we don't need
+ * to worry about attackers exploiting it.
+ */
+void getz(char *buf) {
+ char *ptr;
+
+ ptr = fgets(buf, SIZ, stdin);
+ if (!ptr) {
+ buf[0] = 0;
+ return;
+ }
+
+ ptr = strchr(buf, '\n');
+ if (ptr) *ptr = 0;
+}
+
+
+int uds_connectsock(char *sockpath) {
+ int s;
+ struct sockaddr_un addr;
+
+ memset(&addr, 0, sizeof(addr));
+ addr.sun_family = AF_UNIX;
+ strncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
+
+ s = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (s < 0) {
+ fprintf(stderr, "sendcommand: Can't create socket: %s\n", strerror(errno));
+ exit(3);
+ }
+
+ if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+ fprintf(stderr, "sendcommand: can't connect: %s\n", strerror(errno));
+ close(s);
+ exit(3);
+ }
+
+ return s;
+}
+
+
+/*
+ * input binary data from socket
+ */
+void serv_read(int serv_sock, char *buf, int bytes) {
+ int len, rlen;
+
+ len = 0;
+ while (len < bytes) {
+ rlen = read(serv_sock, &buf[len], bytes - len);
+ if (rlen < 1) {
+ return;
+ }
+ len = len + rlen;
+ }
+}
+
+
+/*
+ * send binary to server
+ */
+void serv_write(int serv_sock, char *buf, int nbytes) {
+ int bytes_written = 0;
+ int retval;
+ while (bytes_written < nbytes) {
+ retval = write(serv_sock, &buf[bytes_written], nbytes - bytes_written);
+ if (retval < 1) {
+ return;
+ }
+ bytes_written = bytes_written + retval;
+ }
+}
+
+
+/*
+ * input string from socket - implemented in terms of serv_read()
+ */
+void serv_gets(int serv_sock, char *buf) {
+ int i;
+
+ /* Read one character at a time.
+ */
+ for (i = 0;; i++) {
+ serv_read(serv_sock, &buf[i], 1);
+ if (buf[i] == '\n' || i == (SIZ-1))
+ break;
+ }
-int main(int argc, char *argv[])
-{
- int relh=0;
- int home=0;
- char relhome[PATH_MAX]="";
+ /* If we got a long line, discard characters until the newline.
+ */
+ if (i == (SIZ-1)) {
+ while (buf[i] != '\n') {
+ serv_read(serv_sock, &buf[i], 1);
+ }
+ }
+
+ /* Strip all trailing nonprintables (crlf)
+ */
+ buf[i] = 0;
+}
+
+
+/*
+ * send line to server - implemented in terms of serv_write()
+ */
+void serv_puts(int serv_sock, char *buf) {
+ serv_write(serv_sock, buf, strlen(buf));
+ serv_write(serv_sock, "\n", 1);
+}
+
+
+int main(int argc, char *argv[]) {
char ctdldir[PATH_MAX]=CTDLDIR;
char yesno[5];
- char sendcommand[PATH_MAX];
- int exitcode;
+ int cmdexit;
char cmd[PATH_MAX];
+ char buf[PATH_MAX];
char socket_path[PATH_MAX];
- char remote_user[256];
- char remote_host[256];
-
- calc_dirs_n_files(relh, home, relhome, ctdldir, 0);
- CtdlMakeTempFileName(socket_path, sizeof socket_path);
-
- system("clear");
- printf( "-------------------------------------------\n"
+ char remote_user[SIZ];
+ char remote_host[SIZ];
+ char remote_sendcommand[PATH_MAX];
+ FILE *sourcefp = NULL;
+ int linecount = 0;
+ int a;
+ int local_admin_socket = (-1);
+
+ /* Parse command line */
+ while ((a = getopt(argc, argv, "h:")) != EOF) {
+ switch (a) {
+ case 'h':
+ strncpy(ctdldir, optarg, sizeof ctdldir);
+ break;
+ default:
+ fprintf(stderr, "sendcommand: usage: ctdlmigrate [-h server_dir]\n");
+ return(1);
+ }
+ }
+
+ if (chdir(ctdldir) != 0) {
+ fprintf(stderr, "sendcommand: %s: %s\n", ctdldir, strerror(errno));
+ exit(errno);
+ }
+
+ printf( "\033[2J\033[H\n"
+ "-------------------------------------------\n"
"Over-the-wire migration utility for Citadel\n"
"-------------------------------------------\n"
"\n"
"to a new host system via a network connection, without disturbing\n"
"the source system. The target may be a different CPU architecture\n"
"and/or operating system. The source system should be running\n"
- "Citadel %d.%02d or newer, and the target system should be running\n"
+ "Citadel version %d or newer, and the target system should be running\n"
"either the same version or a newer version. You will also need\n"
"the 'rsync' utility, and OpenSSH v4 or newer.\n"
"\n"
"You must run this utility on the TARGET SYSTEM. Any existing data\n"
- "on this system will be ERASED.\n"
+ "on this system will be ERASED. Your target system will be on this\n"
+ "host in %s.\n"
"\n"
"Do you wish to continue? "
,
- EXPORT_REV_MIN / 100,
- EXPORT_REV_MIN % 100
+ EXPORT_REV_MIN, ctdldir
);
if ((fgets(yesno, sizeof yesno, stdin) == NULL) || (tolower(yesno[0]) != 'y')) {
printf("\n\nGreat! First we will check some things out here on our target\n"
"system to make sure it is ready to receive data.\n\n");
- printf("Locating 'sendcommand' and checking connectivity to Citadel...\n");
- snprintf(sendcommand, sizeof sendcommand, "%s/sendcommand", ctdl_utilbin_dir);
- snprintf(cmd, sizeof cmd, "%s 'NOOP'", sendcommand);
- exitcode = system(cmd);
- if (exitcode != 0) {
- printf("\nctdlmigrate was unable to attach to the Citadel server\n"
- "here on the target system. Is Citadel running?\n\n");
+ printf("Checking connectivity to Citadel in %s...\n", ctdldir);
+ local_admin_socket = uds_connectsock("citadel-admin.socket");
+
+
+ serv_gets(local_admin_socket, buf);
+ puts(buf);
+ if (buf[0] != '2') {
exit(1);
}
+ serv_puts(local_admin_socket, "ECHO Connection to Citadel Server succeeded.");
+ serv_gets(local_admin_socket, buf);
+ puts(buf);
+ if (buf[0] != '2') {
+ exit(1);
+ }
+
printf("\nOK, this side is ready to go. Now we must connect to the source system.\n\n");
printf("Enter the host name or IP address of the source system\n"
"(example: ctdl.foo.org)\n"
"--> ");
- gets(remote_host);
- printf("\nEnter the name of a user on %s who has full access to Citadel files\n"
- "(usually root)\n--> ",
- remote_host);
- gets(remote_user);
+ getz(remote_host);
+
+ while (IsEmptyStr(remote_user)) {
+ printf("\nEnter the name of a user on %s who has full access to Citadel files\n"
+ "(usually root)\n--> ",
+ remote_host);
+ getz(remote_user);
+ }
printf("\nEstablishing an SSH connection to the source system...\n\n");
+ sprintf(socket_path, "/tmp/ctdlmigrate.XXXXXX");
+ mktemp(socket_path);
unlink(socket_path);
snprintf(cmd, sizeof cmd, "ssh -MNf -S %s %s@%s", socket_path, remote_user, remote_host);
- exitcode = system(cmd);
- if (exitcode != 0) {
- printf("\nctdlmigrate was unable to establish an SSH connection to the\n"
- "source system, and cannot continue.\n\n");
- exit(exitcode);
+ cmdexit = system(cmd);
+ printf("\n");
+ if (cmdexit != 0) {
+ printf("This program was unable to establish an SSH session to the source system.\n\n");
+ exit(cmdexit);
}
printf("\nTesting a command over the connection...\n\n");
snprintf(cmd, sizeof cmd, "ssh -S %s %s@%s 'echo Remote commands are executing successfully.'",
socket_path, remote_user, remote_host);
- exitcode = system(cmd);
+ cmdexit = system(cmd);
printf("\n");
- if (exitcode != 0) {
+ if (cmdexit != 0) {
printf("Remote commands are not succeeding.\n\n");
- exit(exitcode);
+ exit(cmdexit);
+ }
+
+ printf("\nLocating the remote 'sendcommand' and Citadel installation...\n");
+ snprintf(remote_sendcommand, sizeof remote_sendcommand, "/usr/local/citadel/sendcommand");
+ snprintf(cmd, sizeof cmd, "ssh -S %s %s@%s %s NOOP",
+ socket_path, remote_user, remote_host, remote_sendcommand);
+ cmdexit = system(cmd);
+ if (cmdexit != 0) {
+ snprintf(remote_sendcommand, sizeof remote_sendcommand, "/usr/sbin/sendcommand");
+ snprintf(cmd, sizeof cmd, "ssh -S %s %s@%s %s NOOP",
+ socket_path, remote_user, remote_host, remote_sendcommand);
+ cmdexit = system(cmd);
+ }
+ if (cmdexit != 0) {
+ printf("\nUnable to locate Citadel programs on the remote system. Please enter\n"
+ "the name of the directory on %s which contains the 'sendcommand' program.\n"
+ "(example: /opt/foo/citadel)\n"
+ "--> ", remote_host);
+ getz(buf);
+ snprintf(remote_sendcommand, sizeof remote_sendcommand, "%s/sendcommand", buf);
+ snprintf(cmd, sizeof cmd, "ssh -S %s %s@%s %s NOOP",
+ socket_path, remote_user, remote_host, remote_sendcommand);
+ cmdexit = system(cmd);
+ }
+ printf("\n");
+ if (cmdexit != 0) {
+ printf("ctdlmigrate was unable to attach to the remote Citadel system.\n\n");
+ exit(cmdexit);
}
+ printf("\033[2J\n");
+ printf("\033[2;0H\033[33mMigrating from %s\033[0m\n\n", remote_host);
+ snprintf(cmd, sizeof cmd, "ssh -S %s %s@%s %s -w3600 MIGR export", socket_path, remote_user, remote_host, remote_sendcommand);
+ sourcefp = popen(cmd, "r");
+ if (!sourcefp) {
+ printf("\n%s\n\n", strerror(errno));
+ exit(2);
+ }
- // FIXME kill the master ssh session
- printf("If this program was finished we would do more. FIXME\n");
+ serv_puts(local_admin_socket, "MIGR import");
+ serv_gets(local_admin_socket, buf);
+ if (buf[0] != '4') {
+ printf("\n%s\n", buf);
+ exit(3);
+ }
+
+ char *ptr;
+ time_t time_started = time(NULL);
+ time_t last_update = time(NULL);
+ while (ptr = fgets(buf, SIZ, sourcefp), (ptr != NULL)) {
+ ptr = strchr(buf, '\n');
+ if (ptr) *ptr = 0;
+ ++linecount;
+ if (!strncasecmp(buf, "<progress>", 10)) {
+ printf("\033[11;0HPercent complete: \033[32m%d\033[0m\n", atoi(&buf[10]));
+ }
+ if (time(NULL) != last_update) {
+ last_update = time(NULL);
+ printf("\033[10;0H Lines received: \033[32m%d\033[0m\n", linecount);
+ }
+ serv_puts(local_admin_socket, buf);
+ }
+
+ serv_puts(local_admin_socket, "000");
+
+ // FIXME restart the local server now
+
+ pclose(sourcefp);
+ printf("\nShutting down the socket connection...\n\n");
+ snprintf(cmd, sizeof cmd, "ssh -S %s -N -O exit %s@%s", socket_path, remote_user, remote_host);
+ system(cmd);
+ unlink(socket_path);
exit(0);
}
projects / citadel.git / blobdiff