2 Bacula® - The Network Backup Solution
4 Copyright (C) 2007-2010 Free Software Foundation Europe e.V.
6 The main author of Bacula is Kern Sibbald, with contributions from
7 many others, a complete list can be found in the file AUTHORS.
8 This program is Free Software; you can redistribute it and/or
9 modify it under the terms of version three of the GNU Affero General Public
10 License as published by the Free Software Foundation, which is
11 listed in the file LICENSE.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU Affero General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 Bacula® is a registered trademark of Kern Sibbald.
24 The licensor of Bacula is the Free Software Foundation Europe
25 (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
26 Switzerland, email:ftf@fsfeurope.org.
29 * A simple pipe plugin for the Bacula File Daemon
31 * Kern Sibbald, October 2007
32 * Copied into Windows plugin environment March, 2010 (KES)
36 #include "fd_plugins.h"
49 static const int dbglvl = 150;
51 #define PLUGIN_LICENSE "Bacula AGPLv3"
52 #define PLUGIN_AUTHOR "Kern Sibbald"
53 #define PLUGIN_DATE "January 2010"
54 #define PLUGIN_VERSION "1"
55 #define PLUGIN_DESCRIPTION "Bacula Pipe Windows File Daemon Plugin"
57 /* Forward referenced functions */
58 static bRC newPlugin(bpContext *ctx);
59 static bRC freePlugin(bpContext *ctx);
60 static bRC getPluginValue(bpContext *ctx, pVariable var, void *value);
61 static bRC setPluginValue(bpContext *ctx, pVariable var, void *value);
62 static bRC handlePluginEvent(bpContext *ctx, bEvent *event, void *value);
63 static bRC startBackupFile(bpContext *ctx, struct save_pkt *sp);
64 static bRC endBackupFile(bpContext *ctx);
65 static bRC pluginIO(bpContext *ctx, struct io_pkt *io);
66 static bRC startRestoreFile(bpContext *ctx, const char *cmd);
67 static bRC endRestoreFile(bpContext *ctx);
68 static bRC createFile(bpContext *ctx, struct restore_pkt *rp);
69 static bRC setFileAttributes(bpContext *ctx, struct restore_pkt *rp);
71 static char *apply_rp_codes(struct plugin_ctx * p_ctx);
73 /* Pointers to Bacula functions */
74 static bFuncs *bfuncs = NULL;
75 static bInfo *binfo = NULL;
77 /* Plugin Information block */
78 static pInfo pluginInfo = {
80 FD_PLUGIN_INTERFACE_VERSION,
89 /* Plugin entry points for Bacula */
90 static pFuncs pluginFuncs = {
92 FD_PLUGIN_INTERFACE_VERSION,
94 /* Entry points into plugin */
95 newPlugin, /* new plugin instance */
96 freePlugin, /* free plugin instance */
110 * Plugin private context
114 FILE *fd; /* pipe file descriptor */
115 bool backup; /* set for backup (not needed) */
116 char *cmd; /* plugin command line */
117 char *fname; /* filename to "backup/restore" */
118 char *reader; /* reader program for backup */
119 char *writer; /* writer program for backup */
126 * loadPlugin() and unloadPlugin() are entry points that are
127 * exported, so Bacula can directly call these two entry points
128 * they are common to all Bacula plugins.
131 * External entry point called by Bacula to "load the plugin
133 bRC loadPlugin(bInfo *lbinfo, bFuncs *lbfuncs, pInfo **pinfo, pFuncs **pfuncs)
135 bfuncs = lbfuncs; /* set Bacula funct pointers */
137 *pinfo = &pluginInfo; /* return pointer to our info */
138 *pfuncs = &pluginFuncs; /* return pointer to our functions */
144 * External entry point to unload the plugin
148 // printf("bpipe-fd: Unloaded\n");
153 * The following entry points are accessed through the function
154 * pointers we supplied to Bacula. Each plugin type (dir, fd, sd)
155 * has its own set of entry points that the plugin must define.
158 * Create a new instance of the plugin i.e. allocate our private storage
160 static bRC newPlugin(bpContext *ctx)
162 struct plugin_ctx *p_ctx = (struct plugin_ctx *)malloc(sizeof(struct plugin_ctx));
166 memset(p_ctx, 0, sizeof(struct plugin_ctx));
167 ctx->pContext = (void *)p_ctx; /* set our context pointer */
172 * Free a plugin instance, i.e. release our private storage
174 static bRC freePlugin(bpContext *ctx)
176 struct plugin_ctx *p_ctx = (struct plugin_ctx *)ctx->pContext;
181 free(p_ctx->cmd); /* free any allocated command string */
183 free(p_ctx); /* free our private context */
189 * Return some plugin value (none defined)
191 static bRC getPluginValue(bpContext *ctx, pVariable var, void *value)
197 * Set a plugin value (none defined)
199 static bRC setPluginValue(bpContext *ctx, pVariable var, void *value)
205 * Handle an event that was generated in Bacula
207 static bRC handlePluginEvent(bpContext *ctx, bEvent *event, void *value)
209 struct plugin_ctx *p_ctx = (struct plugin_ctx *)ctx->pContext;
217 * Most events don't interest us so we ignore them.
218 * the printfs are so that plugin writers can enable them to see
219 * what is really going on.
221 switch (event->eventType) {
223 bfuncs->DebugMessage(ctx, fi, li, dbglvl, "bpipe-fd: JobStart=%s\n", (char *)value);
226 // printf("bpipe-fd: JobEnd\n");
228 case bEventStartBackupJob:
229 // printf("bpipe-fd: StartBackupJob\n");
231 case bEventEndBackupJob:
232 // printf("bpipe-fd: EndBackupJob\n");
235 // printf("bpipe-fd: JobLevel=%c %d\n", (int)value, (int)value);
238 // printf("bpipe-fd: since=%d\n", (int)value);
241 case bEventStartRestoreJob:
242 // printf("bpipe-fd: StartRestoreJob\n");
245 case bEventEndRestoreJob:
246 // printf("bpipe-fd: EndRestoreJob\n");
249 /* Plugin command e.g. plugin = <plugin-name>:<name-space>:read command:write command */
250 case bEventRestoreCommand:
251 // printf("bpipe-fd: EventRestoreCommand cmd=%s\n", (char *)value);
252 /* Fall-through wanted */
253 case bEventBackupCommand:
255 bfuncs->DebugMessage(ctx, fi, li, dbglvl, "bpipe-fd: pluginEvent cmd=%s\n", (char *)value);
256 p_ctx->cmd = strdup((char *)value);
257 p = strchr(p_ctx->cmd, ':');
259 bfuncs->JobMessage(ctx, fi, li, M_FATAL, 0, "Plugin terminator not found: %s\n", (char *)value);
262 *p++ = 0; /* terminate plugin */
266 bfuncs->JobMessage(ctx, fi, li, M_FATAL, 0, "File terminator not found: %s\n", (char *)value);
269 *p++ = 0; /* terminate file */
273 bfuncs->JobMessage(ctx, fi, li, M_FATAL, 0, "Reader terminator not found: %s\n", (char *)value);
276 *p++ = 0; /* terminate reader string */
278 // printf("bpipe-fd: plugin=%s fname=%s reader=%s writer=%s\n",
279 // p_ctx->cmd, p_ctx->fname, p_ctx->reader, p_ctx->writer);
283 // printf("bpipe-fd: unknown event=%d\n", event->eventType);
290 * Start the backup of a specific file
292 static bRC startBackupFile(bpContext *ctx, struct save_pkt *sp)
294 struct plugin_ctx *p_ctx = (struct plugin_ctx *)ctx->pContext;
298 time_t now = time(NULL);
299 sp->fname = p_ctx->fname;
301 sp->statp.st_mode = 0700 | S_IFREG;
302 sp->statp.st_ctime = now;
303 sp->statp.st_mtime = now;
304 sp->statp.st_atime = now;
305 sp->statp.st_size = 0;
306 sp->statp.st_blksize = 4096;
307 sp->statp.st_blocks = 1;
308 p_ctx->backup = true;
309 // printf("bpipe-fd: startBackupFile\n");
314 * Done with backup of this file
316 static bRC endBackupFile(bpContext *ctx)
319 * We would return bRC_More if we wanted startBackupFile to be
320 * called again to backup another file
327 * Bacula is calling us to do the actual I/O
329 static bRC pluginIO(bpContext *ctx, struct io_pkt *io)
331 struct plugin_ctx *p_ctx = (struct plugin_ctx *)ctx->pContext;
340 bfuncs->DebugMessage(ctx, fi, li, dbglvl, "bpipe-fd: IO_OPEN\n");
341 if (io->flags & (O_CREAT | O_WRONLY)) {
342 char *writer_codes = apply_rp_codes(p_ctx);
344 p_ctx->fd = popen(writer_codes, "w");
345 bfuncs->DebugMessage(ctx, fi, li, dbglvl, "bpipe-fd: IO_OPEN fd=%d writer=%s\n",
346 p_ctx->fd, writer_codes);
348 io->io_errno = errno;
349 bfuncs->JobMessage(ctx, fi, li, M_FATAL, 0,
350 "Open pipe writer=%s failed: ERR=%s\n", writer_codes, strerror(errno));
360 p_ctx->fd = popen(p_ctx->reader, "r");
361 bfuncs->DebugMessage(ctx, fi, li, dbglvl, "bpipe-fd: IO_OPEN fd=%p reader=%s\n",
362 p_ctx->fd, p_ctx->reader);
364 io->io_errno = errno;
365 bfuncs->JobMessage(ctx, fi, li, M_FATAL, 0,
366 "Open pipe reader=%s failed: ERR=%s\n", p_ctx->reader, strerror(errno));
370 bmicrosleep(1,0); /* let pipe connect */
375 bfuncs->JobMessage(ctx, fi, li, M_FATAL, 0, "Logic error: NULL read FD\n");
378 io->status = fread(io->buf, 1, io->count, p_ctx->fd);
379 // bfuncs->DebugMessage(ctx, fi, li, dbglvl, "bpipe-fd: IO_READ buf=%p len=%d\n", io->buf, io->status);
380 if (io->status == 0 && ferror(p_ctx->fd)) {
381 bfuncs->JobMessage(ctx, fi, li, M_FATAL, 0,
382 "Pipe read error: ERR=%s\n", strerror(errno));
383 bfuncs->DebugMessage(ctx, fi, li, dbglvl,
384 "Pipe read error: ERR=%s\n", strerror(errno));
391 bfuncs->JobMessage(ctx, fi, li, M_FATAL, 0, "Logic error: NULL write FD\n");
394 // printf("bpipe-fd: IO_WRITE fd=%p buf=%p len=%d\n", p_ctx->fd, io->buf, io->count);
395 io->status = fwrite(io->buf, 1, io->count, p_ctx->fd);
396 // printf("bpipe-fd: IO_WRITE buf=%p len=%d\n", io->buf, io->status);
397 if (io->status == 0 && ferror(p_ctx->fd)) {
398 bfuncs->JobMessage(ctx, fi, li, M_FATAL, 0,
399 "Pipe write error\n");
400 bfuncs->DebugMessage(ctx, fi, li, dbglvl,
401 "Pipe read error: ERR=%s\n", strerror(errno));
408 bfuncs->JobMessage(ctx, fi, li, M_FATAL, 0, "Logic error: NULL FD on bpipe close\n");
411 io->status = pclose(p_ctx->fd);
415 io->offset = p_ctx->offset;
422 * Bacula is notifying us that a plugin name string was found, and
423 * passing us the plugin command, so we can prepare for a restore.
425 static bRC startRestoreFile(bpContext *ctx, const char *cmd)
427 // printf("bpipe-fd: startRestoreFile cmd=%s\n", cmd);
432 * Bacula is notifying us that the plugin data has terminated, so
433 * the restore for this particular file is done.
435 static bRC endRestoreFile(bpContext *ctx)
437 // printf("bpipe-fd: endRestoreFile\n");
442 * This is called during restore to create the file (if necessary)
443 * We must return in rp->create_status:
446 * CF_SKIP -- skip processing this file
447 * CF_EXTRACT -- extract the file (i.e.call i/o routines)
448 * CF_CREATED -- created, but no content to extract (typically directories)
451 static bRC createFile(bpContext *ctx, struct restore_pkt *rp)
453 // printf("bpipe-fd: createFile\n");
454 if (strlen(rp->where) > 512) {
455 printf("Restore target dir too long. Restricting to first 512 bytes.\n");
457 strncpy(((struct plugin_ctx *)ctx->pContext)->where, rp->where, 513);
458 ((struct plugin_ctx *)ctx->pContext)->replace = rp->replace;
459 rp->create_status = CF_EXTRACT;
464 * We will get here if the File is a directory after everything
465 * is written in the directory.
467 static bRC setFileAttributes(bpContext *ctx, struct restore_pkt *rp)
469 // printf("bpipe-fd: setFileAttributes\n");
473 /*************************************************************************
474 * Apply codes in writer command:
479 * 'always' => 'a', chr(97)
480 * 'ifnewer' => 'w', chr(119)
481 * 'ifolder' => 'o', chr(111)
482 * 'never' => 'n', chr(110)
484 * This function will allocate the required amount of memory with malloc.
485 * Need to be free()d manually.
486 * Inspired by edit_job_codes in lib/util.c
489 static char *apply_rp_codes(struct plugin_ctx * p_ctx)
494 int w_count = 0, r_count = 0;
497 char *imsg = p_ctx->writer;
504 while ((q = strstr(p, "%w"))) {
510 while ((q = strstr(p, "%r"))) {
518 * + number of "where" codes * (len(where)-2)
519 * - number of "replace" codes
521 omsg = (char*)malloc(strlen(imsg) + (w_count * (strlen(p_ctx->where)-2)) - r_count + 1);
523 fprintf(stderr, "Out of memory.");
528 //printf("apply_rp_codes: %s\n", imsg);
529 for (p=imsg; *p; p++) {
539 snprintf(add, 2, "%c", p_ctx->replace);
554 //printf("add_str %s\n", str);
556 //printf("omsg=%s\n", omsg);