source: MondoRescue/branches/2.2.10/mondo/src/common/libmondo-stream.c @ 2303

Last change on this file since 2303 was 2303, checked in by Bruno Cornec, 11 years ago

find_tape_device_and_size => mr_find_tape_device which allocates 1 string to be freed by caller

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1/* libmondo-stream.c
2   $Id: libmondo-stream.c 2303 2009-07-24 19:19:38Z bruno $
3
4...tools for talking to tapes, Monitas streams, etc.
5
6*/
7
8
9/**
10 * @file
11 * Functions for writing data to/reading data from streams (tape, CD stream, etc.)
12 */
13
14#include "my-stuff.h"
15#include "mr_mem.h"
16#include "mondostructures.h"
17#include "libmondo-devices.h"
18#include "lib-common-externs.h"
19#include "libmondo-stream.h"
20#include "libmondo-string-EXT.h"
21#include "libmondo-files-EXT.h"
22#include "libmondo-gui-EXT.h"
23#include "libmondo-fork-EXT.h"
24#include "libmondo-tools-EXT.h"
25#include "libmondo-fifo-EXT.h"
26
27#define EXTRA_TAPE_CHECKSUMS
28#define STR_HEADER  "Mondolicious, baby"
29
30/*@unused@*/
31//static char cvsid[] = "$Id: libmondo-stream.c 2303 2009-07-24 19:19:38Z bruno $";
32extern bool g_sigpipe;
33extern int g_tape_buffer_size_MB;
34
35extern char *g_getfacl;
36extern char *g_getfattr;
37extern char *MONDO_LOGFILE;
38
39/* Reference to global bkpinfo */
40extern struct s_bkpinfo *bkpinfo;
41
42/**
43 * @addtogroup globalGroup
44 * @{
45 */
46/**
47 * The file pointer for the opened tape/CD stream.
48 * Opened and closed by openin_tape(), openin_cdstream(),
49 * openout_tape(), openout_cdstream(), closein_tape(), closein_cdstream(),
50 * closeout_tape(), and closeout_cdstream().
51 */
52FILE *g_tape_stream = NULL;
53
54
55/**
56 * The position (in kilobytes) where we are on the tape.
57 */
58long long g_tape_posK = 0;
59
60/**
61 * The current media number we're using. This value is 1-based.
62 */
63int g_current_media_number = -1;
64
65/**
66 * The tape catalog that keeps track of files written to tape.
67 */
68struct s_tapecatalog *g_tapecatalog;
69
70/* @} - end of globalGroup */
71
72int write_backcatalog_to_tape();
73
74
75
76
77
78/**
79 * @addtogroup streamGroup
80 * @{
81 */
82/**
83 * Close the global output file descriptor which Mondo has used to read
84 * from the CD stream.
85 * @param bkpinfo The backup information structure. Passed directly to closein_tape().
86 * @return 0 for success, nonzero for failure.
87 * @note This should be called by restore processes only.
88 */
89int closein_cdstream()
90{
91    return (closein_tape());
92}
93
94
95/**
96 * Close the global output file descriptor which Mondo has used to read
97 * from buffer or dd, which read from the tape.
98 * @param bkpinfo The backup information structure. Unused.
99 * @return 0 for success, nonzero for failure.
100 * @note This should be called by restore processes only.
101 * @note This function also works for cdstreams for now, but don't count on this behavior.
102 * @bug @p bkpinfo parameter is unused.
103 */
104int closein_tape()
105{
106    /*@ int's ******************************************************* */
107    int retval = 0;
108    int res = 0;
109    int ctrl_chr = '\0';
110
111    /*@ buffers ***************************************************** */
112    char fname[MAX_STR_LEN];
113
114    /*@ long long's ************************************************* */
115    long long size;
116    char *blk;
117    int i;
118
119    blk = (char *) malloc(256 * 1024);
120
121    log_it("closein_tape() -- entering");
122    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
123    retval += res;
124    if (ctrl_chr != BLK_END_OF_BACKUP) {
125        wrong_marker(BLK_END_OF_BACKUP, ctrl_chr);
126    }
127    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
128    retval += res;
129    if (ctrl_chr != BLK_END_OF_TAPE) {
130        wrong_marker(BLK_END_OF_TAPE, ctrl_chr);
131    }
132    for (i = 0; i < 8 && !feof(g_tape_stream); i++) {
133        (void) fread(blk, 1, 256 * 1024, g_tape_stream);
134    }
135    sleep(1);
136    paranoid_system("sync");
137    sleep(1);
138    paranoid_pclose(g_tape_stream);
139    log_it("closein_tape() -- leaving");
140/*
141  for(i=0; i < g_tapecatalog->entries; i++)
142    {
143      log_it("i=%d type=%s num=%d aux=%ld", i, (g_tapecatalog->el[i].type==fileset)?"fileset":"bigslice", g_tapecatalog->el[i].number, g_tapecatalog->el[i].aux);
144    }
145*/
146    if (!bkpinfo->please_dont_eject) {
147        eject_device(bkpinfo->media_device);
148    }
149    paranoid_free(blk);
150    paranoid_free(g_tapecatalog);
151    return (retval);
152}
153
154
155
156/**
157 * Close the global output file descriptor which Mondo has been using to write
158 * to the tape device (via buffer or dd).
159 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
160 * @return 0 for success, nonzero for failure.
161 * @note This should be called by backup processes only.
162 */
163int closeout_tape()
164{
165    /*@ int's ******************************************************* */
166    int retval = 0;
167//  int res = 0;
168//  int ctrl_chr = '\0';
169
170    /*@ buffers ***************************************************** */
171//  char fname[MAX_STR_LEN];
172
173    /*@ long long's ************************************************* */
174//  long long size;
175    int i;
176    char *blk;
177
178    blk = (char *) malloc(256 * 1024);
179
180    sleep(1);
181    paranoid_system("sync");
182    sleep(1);
183    log_it("closeout_tape() -- entering");
184    retval +=
185        write_header_block_to_stream((off_t)0, "end-of-backup",
186                                     BLK_END_OF_BACKUP);
187    retval += write_header_block_to_stream((off_t)0, "end-of-tape", BLK_END_OF_TAPE);   /* just in case */
188/* write 1MB of crap */
189    for (i = 0; i < 256 * 1024; i++) {
190        blk[i] = (int) (random() & 0xFF);
191    }
192    for (i = 0; i < 4 * 8; i++) {
193        (void) fwrite(blk, 1, 256 * 1024, g_tape_stream);
194        if (should_we_write_to_next_tape
195            (bkpinfo->media_size[g_current_media_number], (off_t)256 * 1024)) {
196            start_to_write_to_next_tape();
197        }
198    }
199/* write 1MB of zeroes */
200/*
201    for (i = 0; i < 256*1024; i++)
202      {
203        blk[i] = 0;
204      }
205    for (i = 0; i < 4; i++)
206      {
207        fwrite (blk, 1, 256*1024, g_tape_stream);
208        if (should_we_write_to_next_tape (bkpinfo->media_size[g_current_media_number], 256*1024))
209          {
210            start_to_write_to_next_tape ();
211          }
212      }
213*/
214    sleep(2);
215    paranoid_pclose(g_tape_stream);
216    log_it("closeout_tape() -- leaving");
217    for (i = 0; i < g_tapecatalog->entries; i++) {
218        log_it("i=%d type=%s num=%d aux=%ld posK=%lld", i,
219               (g_tapecatalog->el[i].type ==
220                fileset) ? "fileset" : "bigslice",
221               g_tapecatalog->el[i].number, g_tapecatalog->el[i].aux,
222               g_tapecatalog->el[i].tape_posK);
223    }
224    //  if (!bkpinfo->please_dont_eject)
225    //    { eject_device(bkpinfo->media_device); }
226    paranoid_free(blk);
227    paranoid_free(g_tapecatalog);
228    return (retval);
229}
230
231
232
233bool mt_says_tape_exists(char *dev)
234{
235    char *command = NULL;
236    int res;
237
238    mr_asprintf(&command, "mt -f %s status", dev);
239    res = run_program_and_log_output(command, 1);
240    mr_free(command);
241
242    if (res) {
243        return (FALSE);
244    } else {
245        return (TRUE);
246    }
247}
248
249
250
251/**
252 * Determine the name of the tape device. Tries the SCSI tape for
253 * this platform, then the IDE tape, then "/dev/st0", then "/dev/osst0".
254 * @return the allocated tape string if success, NULL if failure
255 */
256char *mr_find_tape_device(void)
257{
258    char *tmp = NULL;
259    char *command = NULL;
260    char *cdr_exe = NULL;
261    char *dev = NULL;
262    int res;
263
264    log_to_screen("I am looking for your tape streamer. Please wait.");
265    if (find_home_of_exe("cdrecord")) {
266        mr_asprintf(&cdr_exe, "cdrecord");
267    } else {
268        mr_asprintf(&cdr_exe, "dvdrecord");
269    }
270    mr_asprintf(&command, "%s -scanbus 2> /dev/null | grep -i tape | wc -l", cdr_exe);
271    mr_asprintf(&tmp, "%s", call_program_and_get_last_line_of_output(command));
272    mr_free(command);
273
274    if (atoi(tmp) != 1) {
275        log_it("Either too few or too many tape streamers for me to detect...");
276        mr_asprintf(&dev, "%s", VANILLA_SCSI_TAPE);
277        mr_free(tmp);
278        return(dev);
279    }
280    mr_free(tmp);
281
282    mr_asprintf(&command, "%s -scanbus 2> /dev/null | tr -s '\t' ' ' | grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | cut -d' ' -f2 | head -n1", cdr_exe);
283    mr_asprintf(&tmp, "%s", call_program_and_get_last_line_of_output(command));
284    mr_free(command);
285
286    if (strlen(tmp) < 2) {
287        log_it("Could not find tape device");
288        mr_free(tmp);
289        return(dev);
290    }
291    mr_free(tmp);
292    mr_asprintf(&command, "%s -scanbus 2> /dev/null | tr -s '\t' ' ' | grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | cut -d' ' -f3 | cut -d')' -f1 | head -n1", cdr_exe);
293    mr_free(cdr_exe);
294
295    mr_asprintf(&tmp, "%s", call_program_and_get_last_line_of_output(command));
296    mr_free(command);
297
298    mr_asprintf(&dev, "%s", VANILLA_SCSI_TAPE);
299    dev[strlen(dev) - 1] = '\0';
300    mr_strcat(dev, tmp);            // e.g. '/dev/st0' becomes '/dev/stN'
301    mr_free(tmp);
302
303    res = 0;
304    if (!mt_says_tape_exists(dev)) {
305        mr_free(dev);
306        mr_asprintf(&dev, "%s", ALT_TAPE);
307        if (!mt_says_tape_exists(dev)) {
308            log_it("Cannot openin %s", dev);
309            mr_free(dev);
310            mr_asprintf(&dev, "/dev/st0");
311            if (!mt_says_tape_exists(dev)) {
312                log_it("Cannot openin %s", dev);
313                mr_free(dev);
314                mr_asprintf(&dev, "/dev/osst0");
315                if (!mt_says_tape_exists(dev)) {
316                    res++;
317                } else {
318                    res = 0;
319                }
320            }
321        }
322    }
323
324    log_it("At this point, dev = %s and res = %d", dev, res);
325
326    mr_asprintf(&tmp, call_program_and_get_last_line_of_output("cdrecord -scanbus 2> /dev/null | tr -s '\t' ' ' | grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | awk '{for(i=1; i<NF; i++) { if (index($i, \"GB\")>0) { print $i;};};};'"));
327
328    if (mt_says_tape_exists(dev)) {
329        res = 0;
330    } else {
331        log_it("Turning %s", dev);
332        mr_free(tmp);
333        mr_asprintf(&tmp, (strrchr(dev, '/') != NULL) ? strrchr(dev, '/') : dev);
334        mr_free(dev);
335        mr_asprintf(&dev, "/dev/os%s", tmp);
336        log_it("...into %s", dev);
337        if (mt_says_tape_exists(dev)) {
338            res = 0;
339        } else {
340            res++;
341        }
342    }
343
344    log_it("res=%d; dev=%s", res, dev);
345
346    if (res) {
347        mr_free(tmp);
348        return (dev);
349    }
350
351    if (strlen(tmp) < 2) {
352        log_it("Warning - size of tape unknown");
353    }
354    mr_free(tmp);
355    return (NULL);
356}
357
358
359int read_EXAT_files_from_tape(long long *ptmp_size, char *tmp_fname,
360                              int *pctrl_chr, char *xattr_fname,
361                              char *acl_fname)
362{
363    int res = 0;
364    char *fname = (char *)&res;                 /* Should NOT be NULL */
365    char *tmp = NULL;
366
367    // xattr
368    if (g_getfattr) {
369        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
370        if (*pctrl_chr != BLK_START_EXAT_FILE) {
371            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
372        }
373        if (strstr(fname, "xattr") == NULL) {
374            mr_asprintf(&tmp,"Wrong order expected xattr, got %s, sunshine.", fname);
375            fatal_error(tmp);
376        }
377        read_file_from_stream_to_file(xattr_fname, *ptmp_size);
378        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
379        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
380            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
381        }
382        log_msg(1, "Got xattr");
383        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
384        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
385            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
386        }
387        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
388        if (*pctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
389            log_msg(1, "No acl attributes found, skipping to afio files");
390            return(0);
391        } else {
392            if (*pctrl_chr != BLK_START_EXTENDED_ATTRIBUTES) {
393                wrong_marker(BLK_START_EXTENDED_ATTRIBUTES, *pctrl_chr);
394            }
395        }
396    }
397    // acl
398    if (g_getfacl) {
399        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
400        if (*pctrl_chr != BLK_START_EXAT_FILE) {
401            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
402        }
403        if (strstr(fname, "acl") == NULL) {
404            mr_asprintf(&tmp,"Wrong order expected acl, got %s, sunshine.", fname);
405            fatal_error(tmp);
406        }
407        read_file_from_stream_to_file(acl_fname, *ptmp_size);
408        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
409        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
410            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
411        }
412        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
413        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
414            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
415        }
416        log_msg(1, "Got acl");
417    }
418    // tarball itself
419    res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
420    log_msg(1, "End of extended attributes, now looking for afioball");
421    return (0);
422}
423
424
425int write_EXAT_files_to_tape(char *xattr_fname,
426                             char *acl_fname)
427{
428    int res = 0;
429    if (g_getfattr) {
430    // xattr
431        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
432                             BLK_START_EXTENDED_ATTRIBUTES);
433        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
434                             BLK_START_EXAT_FILE);
435        write_file_to_stream_from_file(xattr_fname);
436        write_header_block_to_stream((off_t)-1, xattr_fname, BLK_STOP_EXAT_FILE);
437        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
438                             BLK_STOP_EXTENDED_ATTRIBUTES);
439    }
440    if (g_getfacl) {
441    // acl
442        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
443                             BLK_START_EXTENDED_ATTRIBUTES);
444        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
445                             BLK_START_EXAT_FILE);
446        write_file_to_stream_from_file(acl_fname);
447        write_header_block_to_stream((off_t)-1, acl_fname, BLK_STOP_EXAT_FILE);
448        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
449                             BLK_STOP_EXTENDED_ATTRIBUTES);
450    }
451    return (res);
452}
453
454
455
456
457/**
458 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
459 * @param tapeno The tape number to insist on.
460 * @bug There is currently no way to actually verify that the user has actually
461 * inserted the right tape.
462 */
463void insist_on_this_tape_number(int tapeno)
464{
465    int i;
466    char *tmp = NULL;
467
468    log_it("Insisting on tape #%d", tapeno);
469    if (g_current_media_number != tapeno) {
470        mr_asprintf(&tmp, "When the tape drive goes quiet, please insert volume %d in this series.", tapeno);
471        popup_and_OK(tmp);
472        mr_free(tmp);
473        open_evalcall_form("Waiting while the tape drive settles");
474    } else {
475        open_evalcall_form("Waiting while the tape drive rewinds");
476    }
477
478    for (i = 0; i <= 100; i += 2) {
479        usleep(100000);
480        update_evalcall_form(i);
481    }
482    close_evalcall_form();
483    log_it("I assume user has inserted it. They _say_ they have...");
484    g_current_media_number = tapeno;
485
486    //  log_it("g_current_media_number = %d", g_current_media_number);
487    log_it("OK, I've finished insisting. On with the revelry.");
488}
489
490
491
492
493/**
494 * Debugging aid - log the offset we're at on the tape (reading or writing).
495 */
496void log_tape_pos(void)
497{
498    /*@ buffers ***************************************************** */
499
500
501    /*@ end vars *************************************************** */
502
503    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
504           (long) g_tape_posK >> 10);
505}
506
507
508
509
510/**
511 * Add a file to a collection of recently archived filesets/slices.
512 * The type is determined by the filename: if it contains ".afio." it is
513 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
514 * otherwise we generate a fatal_error().
515 * @param td The current @c bkpinfo->tempdir (file will be placed in <tt>td</tt>/tmpfs/backcatalog/).
516 * @param latest_fname The file to place in the collection.
517 * @return 0, always.
518 * @bug Return value is redundant.
519 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
520 */
521int maintain_collection_of_recent_archives(char *td, char *latest_fname)
522{
523    long long final_alleged_writeK, final_projected_certain_writeK,
524        final_actually_certain_writeK = 0, cposK, bufsize_K;
525    int last, curr, i;
526    t_archtype type = other;
527    char *command = NULL;
528    char *tmpdir = NULL;
529    char *old_fname = NULL;
530    char *p;
531    char suffix[16];
532
533    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
534    if ((p = strrchr(latest_fname, '.'))) {
535        strcpy(suffix, ++p);
536    } else {
537        suffix[0] = '\0';
538    }
539    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
540        type = fileset;
541    } else if (strstr(latest_fname, "slice")) {
542        type = biggieslice;
543    } else {
544        log_it("fname = %s", latest_fname);
545        fatal_error
546            ("Unknown type. Internal error in maintain_collection_of_recent_archives()");
547    }
548    mr_asprintf(&tmpdir, "%s/tmpfs/backcatalog", td);
549    mkdir(tmpdir, 0x700);
550    mr_asprintf(&command, "cp -f %s %s", latest_fname, tmpdir);
551    if (run_program_and_log_output(command, 6)) {
552        log_it("Warning - failed to copy %s to backcatalog at %s",
553               latest_fname, tmpdir);
554    }
555    mr_free(command);
556
557    last = g_tapecatalog->entries - 1;
558    if (last <= 0) {
559        log_it("Too early to start deleting from collection.");
560        mr_free(tmpdir);
561        return (0);
562    }
563    final_alleged_writeK = g_tapecatalog->el[last].tape_posK;
564    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
565    for (curr = last; curr >= 0; curr--) {
566        cposK = g_tapecatalog->el[curr].tape_posK;
567        if (cposK < final_projected_certain_writeK) {
568            final_actually_certain_writeK = cposK;
569            break;
570        }
571    }
572    if (curr < 0) {
573        log_it("Not far enough into tape to start deleting old archives from collection.");
574        mr_free(tmpdir);
575        return (0);
576    }
577
578    for (i = curr - 1; i >= 0 && curr - i < 10; i--) {
579        mr_asprintf(&old_fname, "%s/%s", tmpdir, g_tapecatalog->el[i].fname);
580        unlink(old_fname);
581        mr_free(old_fname);
582    }
583    mr_free(tmpdir);
584    return (0);
585}
586
587
588
589
590/**
591 * Open the CD stream for input.
592 * @param bkpinfo The backup information structure. Passed to openin_tape().
593 * @return 0 for success, nonzero for failure.
594 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
595 */
596int openin_cdstream()
597{
598    return (openin_tape());
599}
600
601/**
602 * FIFO used to read/write to the tape device.
603 * @bug This seems obsolete now that we call an external @c buffer program. Please look onto this.
604 */
605char g_tape_fifo[MAX_STR_LEN];
606
607
608
609int set_tape_block_size_with_mt(long internal_tape_block_size)
610{
611    char *tmp = NULL;
612    int res;
613
614    if (strncmp(bkpinfo->media_device, "/dev/", 5)) {
615        log_msg(1,
616                "Not using 'mt setblk'. This isn't an actual /dev entry.");
617        return (0);
618    }
619    mr_asprintf(&tmp, "mt -f %s setblk %ld", bkpinfo->media_device, internal_tape_block_size);
620    res = run_program_and_log_output(tmp, 3);
621    mr_free(tmp);
622    return (res);
623}
624
625/**
626 * Return the non-rewinding device when passed the normal one
627 * @param tapedev The tape device to open for writing.
628 * @note the caller needs to free the string returned
629 */
630char *get_non_rewind_dev(char *tapedev)
631{
632
633    char *ntapedev = NULL;
634    char *p = NULL;
635    char *q = NULL;
636    char *r = NULL;
637
638    ntapedev = (char *)malloc(strlen(tapedev)+sizeof(char));
639    p = strrchr(tapedev,'/');
640    if (p == NULL) {
641        log_it("Didn't find a '/' in %s",tapedev);
642        return(NULL);
643    }
644
645    /* Copy tapedev content up to the last / */
646    q = tapedev;
647    r = ntapedev;
648    while (q != p) {
649        *r = *q;
650        r++;
651        q++;
652    }
653    /* Copy the '/' */
654    *r = *q;
655    r++;
656    q++;
657    /* Adds a 'n' - non-rewinding */
658    *r = 'n';
659    r++;
660    /* Copy the rest of tapedev */
661    while (*q != '\0') {
662        *r = *q;
663        r++;
664        q++;
665    }
666    *r = '\0';
667    if (mt_says_tape_exists(ntapedev)) {
668        log_it("Non-rewinding tape device is %s",ntapedev);
669    } else {
670        log_it("Unable to find non-rewinding tape device.");
671        ntapedev = NULL;
672    }
673    return(ntapedev);
674}
675
676
677
678/**
679 * Handle OBDR if we were asked to do so
680 * @param tapedev The tape device to open for reading.
681 */
682int skip_obdr(void)
683{
684    char *command = NULL;
685    int res = 0;
686
687    log_it("Skipping OBDR headers");
688    mr_asprintf(&command, "mt -f %s rewind",bkpinfo->media_device);
689    res = run_program_and_log_output(command, 1);
690    paranoid_free(command);
691
692    mr_asprintf(&command, "mt -f %s fsf 2",bkpinfo->media_device);
693    res = run_program_and_log_output(command, 1);
694    paranoid_free(command);
695
696    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
697    return(res);
698}
699
700/**
701 * Handle OBDR if we were asked to do so
702 * @param tapedev The tape device to open for writing.
703 * @return 0 for success, nonzero for failure.
704 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
705 * EXISTING DATA on the tape!
706 */
707int create_obdr(void)
708{
709
710    char *command = NULL;
711    int res = 0;
712
713    log_it("Creating OBDR headers");
714    /* OBDR: First block 10 kB of zero bs = 512 */
715    mr_asprintf(&command, "mt -f %s compression off",bkpinfo->media_device);
716    res = run_program_and_log_output(command, 1);
717    paranoid_free(command);
718
719    mr_asprintf(&command, "mt -f %s rewind",bkpinfo->media_device);
720    res += run_program_and_log_output(command, 1);
721    paranoid_free(command);
722
723    set_tape_block_size_with_mt(512);
724
725    mr_asprintf(&command, "dd if=/dev/zero of=%s bs=512 count=20",bkpinfo->media_device);
726    res += run_program_and_log_output(command, 1);
727    paranoid_free(command);
728
729    /* OBDR: then ISO boot image bs = 2048 */
730    set_tape_block_size_with_mt(2048);
731
732    mr_asprintf(&command, "dd if=%s of=%s bs=2048",MINDI_CACHE"/mondorescue.iso",bkpinfo->media_device);
733    res += run_program_and_log_output(command, 1);
734    paranoid_free(command);
735
736    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
737    return(res);
738}
739
740
741/**
742 * Open the tape device for input.
743 * @param bkpinfo The backup information structure. Fields used:
744 * - @c bkpinfo->media_device
745 * - @c bkpinfo->tmpdir
746 * @return 0 for success, nonzero for failure.
747 * @note This will also work with a cdstream for now, but don't count on this behavior.
748 */
749int openin_tape()
750{
751    /*@ buffer ***************************************************** */
752    char fname[MAX_STR_LEN];
753    char *datablock;
754    char *tmp = NULL;
755    char old_cwd[MAX_STR_LEN];
756    char *outfname = NULL;
757    /*@ int ******************************************************* */
758    int i;
759    int j;
760    int res = 0;
761    long length, templong;
762    size_t k;
763    int retval = 0;
764    int ctrl_chr;
765
766    /*@ long long ************************************************* */
767    long long size;
768
769    /*@ pointers ************************************************** */
770    FILE *fout;
771
772    /*@ end vars *************************************************** */
773
774    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
775    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
776        fatal_error("Cannot alloc mem for tape catalog");
777    }
778    g_tapecatalog->entries = 0;
779    g_tape_posK = 0;
780    if (g_tape_stream) {
781        log_it("FYI - I won't 'openin' the tape. It's already open.");
782        return (0);
783    }
784
785    // mondoarchive should have configured everything to give the right non-rew device
786    if ((bkpinfo->use_obdr) && (bkpinfo->media_device != NULL)) {
787        res = skip_obdr();
788        if (res != 0) {
789            log_it("Not able to skip OBDR - Restore will have to be done manually");
790        }
791    } else {
792        if (bkpinfo->media_device == NULL) {
793            log_it("Not able to skip OBDR - Restore will have to be done manually");
794        }
795        set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
796    }
797
798    insist_on_this_tape_number(1);
799    mr_asprintf(&outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
800    make_hole_for_file(outfname);
801
802//  start_buffer_process( bkpinfo->media_device, g_tape_fifo, FALSE);
803    log_it("Opening IN tape");
804    if (!
805        (g_tape_stream =
806         open_device_via_buffer(bkpinfo->media_device, 'r',
807                                bkpinfo->internal_tape_block_size))) {
808        log_OS_error(g_tape_fifo);
809        log_to_screen("Cannot openin stream device");
810        mr_free(outfname);
811        return (1);
812    }
813    log_to_screen("Reading stream");
814    log_it("stream device = '%s'", bkpinfo->media_device);
815/* skip data disks */
816    open_evalcall_form("Skipping data disks on stream");
817    log_to_screen("Skipping data disks on stream");
818    if (!(fout = fopen(outfname, "w"))) {
819        log_OS_error(outfname);
820        log_to_screen("Cannot openout datadisk all.tar.gz file");
821        mr_free(outfname);
822        return (-1);
823    }
824    if (!(datablock = (char *) malloc(256 * 1024))) {
825        log_to_screen("Unable to malloc 256*1024");
826        mr_free(outfname);
827        finish(1);
828    }
829    for (i = 0; i < 32; i++) {
830        for (j = 0; j < 4; j++) {
831            for (length = 0, k = 0; length < 256 * 1024; length += k) {
832                k = fread(datablock + length, 1, 256 * 1024 - length,
833                          g_tape_stream);
834            }
835            (void) fwrite(datablock, 1, (size_t) length, fout);
836            g_tape_posK += length / 1024;
837        }
838        if (i > 8)              // otherwise, 'buffer' distorts calculations
839        {
840            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
841            update_evalcall_form((int) (templong));
842        }
843    }
844    paranoid_fclose(fout);
845    paranoid_free(datablock);
846
847/* find initial blocks */
848    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
849    retval += res;
850    if (ctrl_chr != BLK_START_OF_TAPE) {
851        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
852    }
853    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
854    retval += res;
855    if (ctrl_chr != BLK_START_OF_BACKUP) {
856        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
857    }
858    close_evalcall_form();
859    log_it("Saved all.tar.gz to '%s'", outfname);
860    (void) getcwd(old_cwd, MAX_STR_LEN);
861    chdir(bkpinfo->tmpdir);
862    mr_asprintf(&tmp, "tar -zxf %s ./tmp/mondo-restore.cfg 2> /dev/null", outfname);
863    paranoid_system(tmp);
864    mr_free(tmp);
865
866    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
867    chdir(old_cwd);
868    unlink(outfname);
869    mr_free(outfname);
870    return (retval);
871}
872
873
874/**
875 * Start writing to a CD stream.
876 * @param cddev The CD device to openout via cdrecord.
877 * @param speed The speed to write at.
878 * @return 0 for success, nonzero for failure.
879 * @note This should be called only from backup processes.
880 */
881int openout_cdstream(char *cddev, int speed)
882{
883    /*@ buffers ***************************************************** */
884    char *command = NULL;
885
886    /*@ end vars *************************************************** */
887
888    /*  add 'dummy' if testing */
889    mr_asprintf(&command, "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s", cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
890    /*  initialise the catalog */
891    g_current_media_number = 1;
892    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
893        fatal_error("Cannot alloc mem for tape catalog");
894    }
895    g_tapecatalog->entries = 0;
896    /* log stuff */
897    log_it("Opening OUT cdstream with the command");
898    log_it(command);
899    /*  log_it("Let's see what happens, shall we?"); */
900    g_tape_stream = popen(command, "w");
901    mr_free(command);
902
903    if (g_tape_stream) {
904        return (0);
905    } else {
906        log_to_screen("Failed to openout to cdstream (fifo)");
907        return (1);
908    }
909}
910
911
912/**
913 * Start writing to a tape device for the backup.
914 * Handle OBDR if we were asked to do so
915 * @param tapedev The tape device to open for writing.
916 * @return 0 for success, nonzero for failure.
917 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
918 * EXISTING DATA on the tape!
919 */
920int openout_tape() {
921
922g_current_media_number = 1;
923if (g_tape_stream) {
924    log_it("FYI - I won't 'openout' the tape. It's already open.");
925    return (0);
926}
927if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
928    fatal_error("Cannot alloc mem for tape catalog");
929}
930g_tapecatalog->entries = 0;
931g_tape_posK = 0;
932
933if (bkpinfo->use_obdr) {
934    create_obdr();
935} else {
936    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
937}
938log_it("Opening OUT tape");
939if (!
940    (g_tape_stream =
941     open_device_via_buffer(bkpinfo->media_device, 'w', bkpinfo->internal_tape_block_size))) {
942    log_OS_error(g_tape_fifo);
943    log_to_screen("Cannot openin stream device");
944    return (1);
945}
946return (0);
947}
948
949
950
951
952/**
953 * Copy a file from the opened stream (CD or tape) to @p outfile.
954 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
955 * @param outfile The file to write to.
956 * @param size The size of the file in the input stream.
957 * @return 0 for success, nonzero for failure.
958 */
959int
960read_file_from_stream_to_file(char *outfile, long long size)
961{
962
963    /*@ int ******************************************************** */
964    int res;
965
966    /*@ end vars *************************************************** */
967
968    res = read_file_from_stream_FULL(outfile, NULL, size);
969
970    return (res);
971}
972
973
974
975/**
976 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
977 * by @p fout.
978 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
979 * @param fout The stream to write the file to.
980 * @param size The size of the file in bytes.
981 * @return 0 for success, nonzero for failure.
982 */
983int
984read_file_from_stream_to_stream(FILE * fout, long long size)
985{
986
987    /*@ int ******************************************************** */
988    int res;
989
990    /*@ end vars *************************************************** */
991
992    res = read_file_from_stream_FULL(NULL, fout, size);
993/*  fflush(g_tape_stream);
994  fflush(fout);*/
995    return (res);
996}
997
998
999
1000/**
1001 * Copy a file from the currently opened stream (CD or tape) to either a
1002 * @c FILE pointer indicating a currently-opened file, or a filename indicating
1003 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
1004 * and read_file_from_stream_to_stream() are wrappers for.
1005 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1006 * @param outfname If non-NULL, write to this file.
1007 * @param foutstream If non-NULL, write to this stream.
1008 * @param orig_size The original length of the file in bytes.
1009 * @return 0 for success, nonzero for failure.
1010 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
1011 */
1012int
1013read_file_from_stream_FULL(char *outfname, FILE * foutstream, long long orig_size)
1014{
1015    /*@ buffers ***************************************************** */
1016    char *tmp = NULL;
1017    char *datablock;
1018    char *temp_fname;
1019    char *temp_cksum;
1020    char *actual_cksum = NULL;
1021//  char *pA, *pB;
1022
1023    /*@ int ********************************************************* */
1024    int retval = 0;
1025#ifdef EXTRA_TAPE_CHECKSUMS
1026    int i, ch;
1027#endif
1028    int noof_blocks;
1029    int ctrl_chr;
1030    int res;
1031    /*@ pointers **************************************************** */
1032    FILE *fout;
1033
1034    /*@ long    ***************************************************** */
1035    long bytes_to_write = 0L /*,i */ ;
1036//  long bytes_successfully_read_in_this_time = 0;
1037
1038    /*@ long long *************************************************** */
1039    long long temp_size, size;
1040    long bytes_read, bytes_to_read;
1041    long long total_read_from_tape_for_this_file = 0;
1042    long long where_I_was_before_tape_change = 0;
1043    /*@ unsigned int ************************************************ */
1044    /*  unsigned int ch; */
1045    unsigned int crc16;
1046    unsigned int crctt;
1047
1048    bool had_to_resync = FALSE;
1049
1050    /*@ init  ******************************************************* */
1051    malloc_string(temp_fname);
1052    malloc_string(temp_cksum);
1053    datablock = malloc(TAPE_BLOCK_SIZE);
1054    crc16 = 0;
1055    crctt = 0;
1056    size = orig_size;
1057
1058    /*@ end vars *************************************************** */
1059
1060    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1061    if (orig_size != temp_size && orig_size != -1) {
1062        mr_asprintf(&tmp, "output file's size should be %ld K but is apparently %ld K", (long) size >> 10, (long) temp_size >> 10);
1063        log_to_screen(tmp);
1064        mr_free(tmp);
1065    }
1066    if (ctrl_chr != BLK_START_FILE) {
1067        wrong_marker(BLK_START_FILE, ctrl_chr);
1068        return (1);
1069    }
1070
1071    if (foutstream) {
1072        fout = foutstream;
1073    } else {
1074        fout = fopen(outfname, "w");
1075    }
1076    if (!fout) {
1077        log_OS_error(outfname);
1078        log_to_screen("Cannot openout file");
1079        return (1);
1080    }
1081    total_read_from_tape_for_this_file = 0;
1082    for (noof_blocks = 0; size > 0;
1083         noof_blocks++, size -=
1084         bytes_to_write, total_read_from_tape_for_this_file +=
1085         bytes_read) {
1086        bytes_to_write =
1087            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1088        bytes_to_read = TAPE_BLOCK_SIZE;
1089        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1090        while (bytes_read < bytes_to_read) {    // next tape!
1091//    crctt=crc16=0;
1092            where_I_was_before_tape_change = size;
1093            log_msg(4, "where_I_was_... = %lld",
1094                    where_I_was_before_tape_change);
1095            start_to_read_from_next_tape();
1096            log_msg(4, "Started reading from next tape.");
1097            skip_incoming_files_until_we_find_this_one(temp_fname);
1098            log_msg(4, "Skipped irrelevant files OK.");
1099            for (size = orig_size; size > where_I_was_before_tape_change;
1100                 size -= bytes_to_write) {
1101                bytes_read =
1102                    fread(datablock, 1, bytes_to_read, g_tape_stream);
1103            }
1104            log_msg(4, "'size' is now %lld (should be %lld)", size,
1105                    where_I_was_before_tape_change);
1106            log_to_screen("Successfully re-sync'd tape");
1107            had_to_resync = TRUE;
1108            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1109        }
1110
1111        (void) fwrite(datablock, 1, (size_t) bytes_to_write, fout); // for blocking reasons, bytes_successfully_read_in isn't necessarily the same as bytes_to_write
1112
1113#ifdef EXTRA_TAPE_CHECKSUMS
1114        for (i = 0; i < (int) bytes_to_write; i++) {
1115            ch = datablock[i];
1116            crc16 = updcrcr(crc16, (unsigned) ch);
1117            crctt = updcrc(crctt, (unsigned) ch);
1118        }
1119#endif
1120    }
1121    log_msg(6, "Total read from tape for this file = %lld",
1122            total_read_from_tape_for_this_file);
1123    log_msg(6, ".......................... Should be %lld", orig_size);
1124    g_tape_posK += total_read_from_tape_for_this_file / 1024;
1125    mr_asprintf(&actual_cksum, "%04x%04x", crc16, crctt);
1126    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
1127    } else {
1128        paranoid_fclose(fout);
1129    }
1130    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
1131    if (ctrl_chr != BLK_STOP_FILE) {
1132        wrong_marker(BLK_STOP_FILE, ctrl_chr);
1133    }
1134    if (strcmp(temp_cksum, actual_cksum)) {
1135        mr_asprintf(&tmp, "actual cksum=%s; recorded cksum=%s", actual_cksum, temp_cksum);
1136        log_to_screen(tmp);
1137        mr_free(tmp);
1138
1139        mr_asprintf(&tmp, "%s (%ld K) is corrupt on tape", temp_fname, (long) orig_size >> 10);
1140        log_to_screen(tmp);
1141        mr_free(tmp);
1142
1143        retval++;
1144    }
1145    mr_free(actual_cksum);
1146
1147    paranoid_free(datablock);
1148    paranoid_free(temp_fname);
1149    paranoid_free(temp_cksum);
1150    return (retval);
1151}
1152
1153
1154
1155/**
1156 * Read a header block from the currently opened stream (CD or tape).
1157 * This block indicates the length of the following file (if it's file-related)
1158 * the filename (if it's file-related), and the block type.
1159 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
1160 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
1161 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
1162 * @return 0 for success, nonzero for failure.
1163 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
1164 */
1165int
1166read_header_block_from_stream(long long *plen, char *filename,
1167                              int *pcontrol_char)
1168{
1169
1170    /*@ buffers ***************************************************** */
1171    char *tempblock;
1172
1173    /*@ int ********************************************************* */
1174    int i, retval;
1175
1176    /*@ end vars *************************************************** */
1177
1178    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
1179
1180    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1181        tempblock[i] = 0;
1182    }
1183    while (!(*pcontrol_char = tempblock[7000])) {
1184        g_tape_posK +=
1185            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1186                  g_tape_stream) / 1024;
1187    }
1188/*  memcpy((char*)plength_of_incoming_file,(char*)tempblock+7001,sizeof(long long)); */
1189/*  for(*plen=0,i=7;i>=0;i--) {*plen<<=8; *plen |= tempblock[7001+i];} */
1190    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1191    if (strcmp(tempblock + 6000 + *pcontrol_char, STR_HEADER)) {
1192        log_it("Bad header block at %ld K", (long) g_tape_posK);
1193    }
1194    strcpy(filename, tempblock + 1000);
1195/*  strcpy(cksum,tempblock+5555);*/
1196/*  log_it( "%s  (reading) fname=%s, filesize=%ld K",
1197       marker_to_string (*pcontrol_char), filename,
1198       (long) ((*plen) >> 10));
1199*/
1200    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1201        log_to_screen("I can't verify an aborted backup.");
1202        retval = 1;
1203    } else {
1204        retval = 0;
1205    }
1206    for (i = 1000; i < 1020; i++) {
1207        if (tempblock[i] < 32 || tempblock[i] > 126) {
1208            tempblock[i] = ' ';
1209        }
1210    }
1211    tempblock[i] = '\0';
1212    log_msg(6, "%s (fname=%s, size=%ld K)",
1213            marker_to_string(*pcontrol_char), tempblock + 1000,
1214            (long) (*plen) >> 10);
1215    paranoid_free(tempblock);
1216    return (retval);
1217}
1218
1219
1220
1221/**
1222 * Add specified file/slice to the internal catalog of all archives written.
1223 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1224 * write the last [buffer size] MB from the catalog to the new tape, so we know
1225 * we have @e all archives on some CD/tape/whatever.
1226 * @param type The type of file we're cataloging (afioball, slice, something else)
1227 * @param number The fileset number or biggiefile number.
1228 * @param aux The slice number if it's a biggiefile, or any other additional info.
1229 * @param fn The original full pathname of the file we're recording.
1230 * @return The index of the record we just added.
1231 */
1232int register_in_tape_catalog(t_archtype type, int number, long aux,
1233                             char *fn)
1234{
1235    int last;
1236    char fname[MAX_TAPECAT_FNAME_LEN+1];
1237    char *p;
1238
1239    p = strrchr(fn, '/');
1240    if (p) {
1241        p++;
1242    } else {
1243        p = fn;
1244    }
1245    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1246    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1247    last = g_tapecatalog->entries;
1248    if (last >= MAX_TAPECATALOG_ENTRIES) {
1249        log_it
1250            ("Warning - can't log #%d in tape catalog - too many entries already",
1251             number);
1252        return (-1);
1253    }
1254    g_tapecatalog->el[last].type = type;
1255    g_tapecatalog->el[last].number = number;
1256    g_tapecatalog->el[last].aux = aux;
1257    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1258    strcpy(g_tapecatalog->el[last].fname, fname);
1259    g_tapecatalog->entries++;
1260    return (last);              // returns the index of the record we've jsut added
1261}
1262
1263
1264
1265
1266/**
1267 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1268 * (got SIGPIPE) or look like we will.
1269 * @param mediasize The size of the tape in megabytes.
1270 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1271 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1272 * autodetecting the size. Huh?
1273 */
1274
1275/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1276bool
1277should_we_write_to_next_tape(long mediasize,
1278                             off_t length_of_incoming_file)
1279{
1280    /*@ bool's ***************************************************** */
1281    bool we_need_a_new_tape = FALSE;
1282
1283    /*@ end vars *************************************************** */
1284
1285    if (mediasize == 0) {
1286        return (FALSE);
1287    }
1288    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1289        log_it("mediasize = %ld", mediasize);
1290        we_need_a_new_tape = TRUE;
1291        log_to_screen("Should have started a new tape/CD already");
1292    }
1293    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1294        mediasize - (SLICE_SIZE * 4 / 1024)) {
1295        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1296               mediasize);
1297        we_need_a_new_tape = TRUE;
1298    }
1299    return (we_need_a_new_tape);
1300}
1301
1302
1303/**
1304 * Seek through the stream until we find a header block where the NAME field matches
1305 * @p the_file_I_was_reading. This is useful if you've just started reading from
1306 * a new tape and want to find the file you were reading when the tape ended.
1307 * @param the_file_I_was_reading File name to look for.
1308 * @return 0 for success, nonzero for failure.
1309 */
1310int skip_incoming_files_until_we_find_this_one(char
1311                                               *the_file_I_was_reading)
1312{
1313    char *pA;
1314    char *pB;
1315    int res;
1316    int ctrl_chr;
1317    char *temp_fname;
1318    char *datablock;
1319    long long temp_size, size;
1320    long bytes_to_write;
1321
1322    datablock = malloc(TAPE_BLOCK_SIZE);
1323    malloc_string(temp_fname);
1324    pB = strrchr(the_file_I_was_reading, '/');
1325    if (pB) {
1326        pB++;
1327    } else {
1328        pB = the_file_I_was_reading;
1329    }
1330    log_msg(1, "skip_incoming_..(%s)", pB);
1331    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1332    ctrl_chr = -1;
1333    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1334        res =
1335            read_header_block_from_stream(&temp_size, temp_fname,
1336                                          &ctrl_chr);
1337        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1338            break;
1339        }
1340        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1341        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1342        log_msg(3, "Still trying to re-sync w/ tape");
1343    }
1344    while (ctrl_chr != BLK_START_FILE) {
1345        res =
1346            read_header_block_from_stream(&temp_size, temp_fname,
1347                                          &ctrl_chr);
1348        if (ctrl_chr == BLK_START_FILE) {
1349            break;
1350        }
1351        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1352        wrong_marker(BLK_START_FILE, ctrl_chr);
1353        log_msg(3, "Still trying to re-sync w/ tape");
1354    }
1355    pA = strrchr(temp_fname, '/');
1356    if (pA) {
1357        pA++;
1358    } else {
1359        pA = temp_fname;
1360    }
1361    pB = strrchr(the_file_I_was_reading, '/');
1362    if (pB) {
1363        pB++;
1364    } else {
1365        pB = the_file_I_was_reading;
1366    }
1367    while (strcmp(pA, pB)) {
1368        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1369                the_file_I_was_reading);
1370        for (size = temp_size; size > 0; size -= bytes_to_write) {
1371            bytes_to_write =
1372                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1373            // FIXME - needs error-checking and -catching
1374            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1375        }
1376        res =
1377            read_header_block_from_stream(&temp_size, temp_fname,
1378                                          &ctrl_chr);
1379        if (ctrl_chr != BLK_STOP_FILE) {
1380            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1381        }
1382        res =
1383            read_header_block_from_stream(&temp_size, temp_fname,
1384                                          &ctrl_chr);
1385        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1386            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1387        }
1388        res =
1389            read_header_block_from_stream(&temp_size, temp_fname,
1390                                          &ctrl_chr);
1391        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1392            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1393        }
1394        res =
1395            read_header_block_from_stream(&temp_size, temp_fname,
1396                                          &ctrl_chr);
1397        if (ctrl_chr != BLK_START_FILE) {
1398            wrong_marker(BLK_START_FILE, ctrl_chr);
1399        }
1400        pA = strrchr(temp_fname, '/');
1401        if (pA) {
1402            pA++;
1403        } else {
1404            pA = temp_fname;
1405        }
1406        pB = strrchr(the_file_I_was_reading, '/');
1407        if (pB) {
1408            pB++;
1409        } else {
1410            pB = the_file_I_was_reading;
1411        }
1412    }
1413    log_msg(2, "Reading %s (it matches %s)", temp_fname,
1414            the_file_I_was_reading);
1415    paranoid_free(temp_fname);
1416    paranoid_free(datablock);
1417    return (0);
1418}
1419
1420
1421/**
1422 * Start to read from the next tape. Assumes the user has already inserted it.
1423 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1424 * @return 0 for success, nonzero for failure.
1425 */
1426int start_to_read_from_next_tape()
1427{
1428    /*@ int ********************************************************* */
1429    int res = 0;
1430    char *sz_msg;
1431    int ctrlchr;
1432    long long temp_size;
1433    malloc_string(sz_msg);
1434    /*@ end vars *************************************************** */
1435
1436    paranoid_pclose(g_tape_stream);
1437    sync();
1438    sync();
1439    sync();
1440    log_it("Next tape requested.");
1441    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1442    log_it("Opening IN the next tape");
1443    if (!
1444        (g_tape_stream =
1445         open_device_via_buffer(bkpinfo->media_device, 'r',
1446                                bkpinfo->internal_tape_block_size))) {
1447        log_OS_error(g_tape_fifo);
1448        log_to_screen("Cannot openin stream device");
1449        return (1);
1450    }
1451    g_tape_posK = 0;
1452    g_sigpipe = FALSE;
1453    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1454    if (ctrlchr != BLK_START_OF_TAPE) {
1455        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1456    }
1457    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1458    if (ctrlchr != BLK_START_OF_BACKUP) {
1459        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1460    } else {
1461        log_msg(3, "Next tape opened OK. Whoopee!");
1462    }
1463    paranoid_free(sz_msg);
1464    return (res);
1465}
1466
1467
1468
1469/**
1470 * Start to write to the next tape. Assume the user has already inserted it.
1471 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1472 * @return 0 for success, nonzero for failure.
1473 */
1474int start_to_write_to_next_tape()
1475{
1476    int res = 0;
1477    char *command = NULL;
1478
1479    paranoid_pclose(g_tape_stream);
1480    system("sync");
1481    system("sync");
1482    system("sync");
1483    log_it("New tape requested.");
1484    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1485    if (g_current_media_number > MAX_NOOF_MEDIA) {
1486        res++;
1487        log_to_screen("Too many tapes. Man, you need to use nfs!");
1488    }
1489    if (bkpinfo->backup_media_type == cdstream) {
1490        mr_asprintf(&command, "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s", bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE, MONDO_LOGFILE);
1491        log_it("Opening OUT to next CD with the command");
1492        log_it(command);
1493        log_it("Let's see what happens, shall we?");
1494        g_tape_stream = popen(command, "w");
1495        mr_free(command);
1496
1497        if (!g_tape_stream) {
1498            log_to_screen("Failed to openout to cdstream (fifo)");
1499            return (1);
1500        }
1501    } else {
1502        log_it("Opening OUT to next tape");
1503        if (!
1504            (g_tape_stream =
1505             open_device_via_buffer(bkpinfo->media_device, 'w',
1506                                    bkpinfo->internal_tape_block_size))) {
1507            log_OS_error(g_tape_fifo);
1508            log_to_screen("Cannot openin stream device");
1509            return (1);
1510        }
1511    }
1512    g_tape_posK = 0;
1513    g_sigpipe = FALSE;
1514    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1515    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1516    return (res);
1517}
1518
1519
1520
1521
1522/**
1523 * Write a bufferfull of the most recent archives to the tape. The
1524 * rationale behind this is a bit complex. If the previous tape ended
1525 * suddenly (EOF or otherwise) some archives were probably left in the
1526 * buffer. That means that Mondo thinks they have been written, but
1527 * the external binary @c buffer has not actually written them. So to
1528 * be safe, we start the new tape by writing the last bufferfull from
1529 * the old one. This insures that all archives will be on at least
1530 * one tape. Sounds inelegant, but it works.
1531 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1532 * @return 0 for success, nonzero for failure.
1533 */
1534int write_backcatalog_to_tape()
1535{
1536    int i, last, res = 0;
1537    char *fname = NULL;
1538
1539    log_msg(2, "I am now writing back catalog to tape");
1540    last = g_tapecatalog->entries - 1;
1541    for (i = 0; i <= last; i++) {
1542        mr_asprintf(&fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir, g_tapecatalog->el[i].fname);
1543        if (!does_file_exist(fname)) {
1544            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1545        } else {
1546            write_header_block_to_stream(length_of_file(fname),
1547                                         "start-backcatalog-afio-or-slice",
1548                                         BLK_START_AN_AFIO_OR_SLICE);
1549            log_msg(2, "Writing %s", fname);
1550            if (write_file_to_stream_from_file(fname)) {
1551                res++;
1552                log_msg(2, "%s failed", fname);
1553            }
1554            if (i != last) {
1555                write_header_block_to_stream((off_t)0,
1556                                             "stop-backcatalog-afio-or-slice",
1557                                             BLK_STOP_AN_AFIO_OR_SLICE);
1558            }
1559        }
1560        mr_free(fname);
1561    }
1562    log_msg(2, "Finished writing back catalog to tape");
1563    return (res);
1564}
1565
1566
1567
1568/**
1569 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1570 * @param fname The path to all.tar.gz.
1571 * @return 0 for success, nonzero for failure.
1572 */
1573int write_data_disks_to_stream(char *fname)
1574{
1575    /*@ pointers *************************************************** */
1576    FILE *fin;
1577    char *tmp = NULL;
1578
1579    /*@ long ******************************************************* */
1580    long m = -1;
1581    long templong;
1582
1583    /*@ int ******************************************************** */
1584    int i, j;
1585
1586    /*@ buffers **************************************************** */
1587    char tempblock[256 * 1024];
1588
1589    /*@ end vars *************************************************** */
1590
1591    open_evalcall_form("Writing data disks to tape");
1592    log_to_screen("Writing data disks to tape");
1593    log_it("Data disks = %s", fname);
1594    if (!does_file_exist(fname)) {
1595        mr_asprintf(&tmp, "Cannot find %s", fname);
1596        log_to_screen(tmp);
1597        mr_free(tmp);
1598        return (1);
1599    }
1600    if (!(fin = fopen(fname, "r"))) {
1601        log_OS_error(fname);
1602        fatal_error("Cannot openin the data disk");
1603    }
1604    for (i = 0; i < 32; i++) {  /* 32MB */
1605        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1606            if (!feof(fin)) {
1607                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1608            } else {
1609                m = 0;
1610            }
1611            for (; m < 256 * 1024; m++) {
1612                tempblock[m] = '\0';
1613            }
1614            g_tape_posK +=
1615                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1616        }
1617        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1618        {
1619            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1620            update_evalcall_form((int) (templong));
1621        }
1622    }
1623    paranoid_fclose(fin);
1624    close_evalcall_form();
1625    return (0);
1626}
1627
1628
1629
1630
1631/**
1632 * Copy @p infile to the opened stream (CD or tape).
1633 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1634 * @param infile The file to write to the stream.
1635 * @return 0 for success, nonzero for failure.
1636 */
1637int write_file_to_stream_from_file(char *infile)
1638{
1639    /*@ buffers **************************************************** */
1640    char *tmp = NULL;
1641    char datablock[TAPE_BLOCK_SIZE];
1642    char *checksum = NULL;
1643    char *infile_basename;
1644
1645    /*@ int ******************************************************** */
1646    int retval = 0;
1647    int noof_blocks;
1648
1649    /*  unsigned int ch; */
1650    unsigned int crc16;
1651    unsigned int crctt;
1652
1653    /*@ pointers *************************************************** */
1654    FILE *fin;
1655    char *p;
1656
1657    /*@ long ******************************************************* */
1658    long bytes_to_read = 0;
1659    long i;
1660
1661    off_t filesize;
1662
1663#ifdef EXTRA_TAPE_CHECKSUMS
1664    int ch;
1665#endif
1666
1667    /*@ initialize ************************************************ */
1668    crc16 = 0;
1669    crctt = 0;
1670
1671
1672
1673    /*@ end vars *************************************************** */
1674
1675    infile_basename = strrchr(infile, '/');
1676    if (infile_basename) {
1677        infile_basename++;
1678    } else {
1679        infile_basename = infile;
1680    }
1681    filesize = length_of_file(infile);
1682    if (should_we_write_to_next_tape
1683        (bkpinfo->media_size[g_current_media_number], filesize)) {
1684        start_to_write_to_next_tape();
1685        write_backcatalog_to_tape();
1686    }
1687    p = strrchr(infile, '/');
1688    if (!p) {
1689        p = infile;
1690    } else {
1691        p++;
1692    }
1693    mr_asprintf(&tmp, "Writing file '%s' to tape (%ld KB)", p, (long) filesize >> 10);
1694    log_it(tmp);
1695    mr_free(tmp);
1696    write_header_block_to_stream(filesize, infile_basename,
1697                                 BLK_START_FILE);
1698//go_here_to_restart_saving_of_file:
1699    if (!(fin = fopen(infile, "r"))) {
1700        log_OS_error(infile);
1701        return (1);
1702    }
1703    for (noof_blocks = 0; filesize > 0;
1704         noof_blocks++, filesize -= bytes_to_read) {
1705        if (filesize < TAPE_BLOCK_SIZE) {
1706            bytes_to_read = (long) filesize;
1707            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1708                datablock[i] = '\0';
1709            }
1710        } else {
1711            bytes_to_read = TAPE_BLOCK_SIZE;
1712        }
1713        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1714        g_tape_posK +=
1715            fwrite(datablock, 1, /*bytes_to_read */ 
1716                   (size_t) TAPE_BLOCK_SIZE,
1717                   g_tape_stream) / 1024;
1718        if (g_sigpipe) {
1719            log_it("Sigpipe occurred recently. I'll start a new tape.");
1720            fclose(fin);
1721            g_sigpipe = FALSE;
1722            start_to_write_to_next_tape();
1723            write_backcatalog_to_tape();    // kinda-sorta recursive :)
1724            return (0);
1725        }
1726#ifdef EXTRA_TAPE_CHECKSUMS
1727        for (i = 0; i < bytes_to_read; i++) {
1728            ch = datablock[i];
1729            crc16 = updcrcr(crc16, (unsigned) ch);
1730            crctt = updcrc(crctt, (unsigned) ch);
1731        }
1732#endif
1733    }
1734    paranoid_fclose(fin);
1735    mr_asprintf(&checksum, "%04x%04x", crc16, crctt);
1736    /* BERLIOS: what does it do ??? */
1737    write_header_block_to_stream((off_t)g_current_media_number, checksum, BLK_STOP_FILE);
1738    mr_free(checksum);
1739
1740//  log_it("File '%s' written to tape.", infile);
1741    return (retval);
1742}
1743
1744
1745
1746
1747
1748/**
1749 * Write a header block to the opened stream (CD or tape).
1750 * @param length_of_incoming_file The length to store in the header block.
1751 * Usually matters only if this is a file-related header, in which case it should
1752 * be the length of the file that will follow.
1753 * @param filename The filename to store in the header block. Usually matters
1754 * only if this is a file-related header, in which case this should be the name
1755 * if the file that will follow.
1756 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1757 * @return 0 for success, nonzero for failure.
1758 */
1759int
1760write_header_block_to_stream(off_t length_of_incoming_file,
1761                             char *filename, int control_char)
1762{
1763    /*@ buffers **************************************************** */
1764    char tempblock[TAPE_BLOCK_SIZE];
1765    char *tmp = NULL;
1766    char *p;
1767
1768    /*@ int ******************************************************** */
1769    int i;
1770
1771    off_t olen;
1772
1773    /*@ end vars *************************************************** */
1774
1775
1776    olen = length_of_incoming_file;
1777    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1778    if (!p) {
1779        p = filename;
1780    } else {
1781        p++;
1782    }
1783    if (!g_tape_stream) {
1784        log_to_screen
1785            ("You're not backing up to tape. Why write a tape header?");
1786        return (1);
1787    }
1788    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1789        tempblock[i] = 0;
1790    }
1791    sprintf(tempblock + 6000 + control_char, STR_HEADER);
1792    tempblock[7000] = control_char;
1793    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1794    strcpy(tempblock + 1000, filename);
1795    g_tape_posK +=
1796        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1797               g_tape_stream) / 1024;
1798    mr_asprintf(&tmp, "%s (fname=%s, size=%ld K)", marker_to_string(control_char), p, (long) length_of_incoming_file >> 10);
1799    log_msg(6, tmp);
1800    mr_free(tmp);
1801    return (0);
1802}
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813/**
1814 * Log (to screen) an erroneous marker, along with what it should have been.
1815 * @param should_be What we were expecting.
1816 * @param it_is What we got.
1817 */
1818void wrong_marker(int should_be, int it_is)
1819{
1820    /*@ buffer ***************************************************** */
1821    char *tmp = NULL;
1822
1823
1824    /*@ end vars *************************************************** */
1825    mr_asprintf(&tmp, "Wrong marker! (Should be %s, is actually %s)", marker_to_string(should_be), marker_to_string(it_is));
1826    log_to_screen(tmp);
1827    mr_free(tmp);
1828}
1829
1830/* @} - end of streamGroup */
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