source: branches/2.2.10/mondo/src/common/libmondo-stream.c @ 2324

Last change on this file since 2324 was 2324, checked in by Bruno Cornec, 11 years ago

r3335@localhost: bruno | 2009-08-08 23:04:12 +0200

  • Change mr_asprintf to avoid the need of pointer and be consistent with the other mr_mem functions
  • Property svn:keywords set to Id
File size: 50.6 KB
Line 
1/* libmondo-stream.c
2   $Id: libmondo-stream.c 2324 2009-08-18 13:13:54Z 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 2324 2009-08-18 13:13:54Z 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 latest_fname The file to place in the collection.
516 * @return 0, always.
517 * @bug Return value is redundant.
518 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
519 */
520int maintain_collection_of_recent_archives(char *latest_fname)
521{
522    long long final_alleged_writeK, final_projected_certain_writeK,
523        final_actually_certain_writeK = 0, cposK, bufsize_K;
524    int last, curr, i;
525    t_archtype type = other;
526    char *command = NULL;
527    char *tmpdir = NULL;
528    char *old_fname = NULL;
529    char *p;
530    char suffix[16];
531
532    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
533    if ((p = strrchr(latest_fname, '.'))) {
534        strcpy(suffix, ++p);
535    } else {
536        suffix[0] = '\0';
537    }
538    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
539        type = fileset;
540    } else if (strstr(latest_fname, "slice")) {
541        type = biggieslice;
542    } else {
543        log_it("fname = %s", latest_fname);
544        fatal_error("Unknown type. Internal error in maintain_collection_of_recent_archives()");
545    }
546    mr_asprintf(tmpdir, "%s/tmpfs/backcatalog", bkpinfo->tmpdir);
547    mkdir(tmpdir, 0x700);
548    mr_asprintf(command, "cp -f %s %s", latest_fname, tmpdir);
549    if (run_program_and_log_output(command, 6)) {
550        log_it("Warning - failed to copy %s to backcatalog at %s",
551               latest_fname, tmpdir);
552    }
553    mr_free(command);
554
555    last = g_tapecatalog->entries - 1;
556    if (last <= 0) {
557        log_it("Too early to start deleting from collection.");
558        mr_free(tmpdir);
559        return (0);
560    }
561    final_alleged_writeK = g_tapecatalog->el[last].tape_posK;
562    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
563    for (curr = last; curr >= 0; curr--) {
564        cposK = g_tapecatalog->el[curr].tape_posK;
565        if (cposK < final_projected_certain_writeK) {
566            final_actually_certain_writeK = cposK;
567            break;
568        }
569    }
570    if (curr < 0) {
571        log_it("Not far enough into tape to start deleting old archives from collection.");
572        mr_free(tmpdir);
573        return (0);
574    }
575
576    for (i = curr - 1; i >= 0 && curr - i < 10; i--) {
577        mr_asprintf(old_fname, "%s/%s", tmpdir, g_tapecatalog->el[i].fname);
578        unlink(old_fname);
579        mr_free(old_fname);
580    }
581    mr_free(tmpdir);
582    return (0);
583}
584
585
586
587
588/**
589 * Open the CD stream for input.
590 * @param bkpinfo The backup information structure. Passed to openin_tape().
591 * @return 0 for success, nonzero for failure.
592 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
593 */
594int openin_cdstream()
595{
596    return (openin_tape());
597}
598
599/**
600 * FIFO used to read/write to the tape device.
601 * @bug This seems obsolete now that we call an external @c buffer program. Please look onto this.
602 */
603char g_tape_fifo[MAX_STR_LEN];
604
605
606
607int set_tape_block_size_with_mt(long internal_tape_block_size)
608{
609    char *tmp = NULL;
610    int res;
611
612    if (strncmp(bkpinfo->media_device, "/dev/", 5)) {
613        log_msg(1,
614                "Not using 'mt setblk'. This isn't an actual /dev entry.");
615        return (0);
616    }
617    mr_asprintf(tmp, "mt -f %s setblk %ld", bkpinfo->media_device, internal_tape_block_size);
618    res = run_program_and_log_output(tmp, 3);
619    mr_free(tmp);
620    return (res);
621}
622
623/**
624 * Return the non-rewinding device when passed the normal one
625 * @param tapedev The tape device to open for writing.
626 * @note the caller needs to free the string returned
627 */
628char *get_non_rewind_dev(char *tapedev)
629{
630
631    char *ntapedev = NULL;
632    char *p = NULL;
633    char *q = NULL;
634    char *r = NULL;
635
636    ntapedev = (char *)malloc(strlen(tapedev)+sizeof(char));
637    p = strrchr(tapedev,'/');
638    if (p == NULL) {
639        log_it("Didn't find a '/' in %s",tapedev);
640        return(NULL);
641    }
642
643    /* Copy tapedev content up to the last / */
644    q = tapedev;
645    r = ntapedev;
646    while (q != p) {
647        *r = *q;
648        r++;
649        q++;
650    }
651    /* Copy the '/' */
652    *r = *q;
653    r++;
654    q++;
655    /* Adds a 'n' - non-rewinding */
656    *r = 'n';
657    r++;
658    /* Copy the rest of tapedev */
659    while (*q != '\0') {
660        *r = *q;
661        r++;
662        q++;
663    }
664    *r = '\0';
665    if (mt_says_tape_exists(ntapedev)) {
666        log_it("Non-rewinding tape device is %s",ntapedev);
667    } else {
668        log_it("Unable to find non-rewinding tape device.");
669        ntapedev = NULL;
670    }
671    return(ntapedev);
672}
673
674
675
676/**
677 * Handle OBDR if we were asked to do so
678 * @param tapedev The tape device to open for reading.
679 */
680int skip_obdr(void)
681{
682    char *command = NULL;
683    int res = 0;
684
685    log_it("Skipping OBDR headers");
686    mr_asprintf(command, "mt -f %s rewind",bkpinfo->media_device);
687    res = run_program_and_log_output(command, 1);
688    paranoid_free(command);
689
690    mr_asprintf(command, "mt -f %s fsf 2",bkpinfo->media_device);
691    res = run_program_and_log_output(command, 1);
692    paranoid_free(command);
693
694    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
695    return(res);
696}
697
698/**
699 * Handle OBDR if we were asked to do so
700 * @param tapedev The tape device to open for writing.
701 * @return 0 for success, nonzero for failure.
702 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
703 * EXISTING DATA on the tape!
704 */
705int create_obdr(void)
706{
707
708    char *command = NULL;
709    int res = 0;
710
711    log_it("Creating OBDR headers");
712    /* OBDR: First block 10 kB of zero bs = 512 */
713    mr_asprintf(command, "mt -f %s compression off",bkpinfo->media_device);
714    res = run_program_and_log_output(command, 1);
715    paranoid_free(command);
716
717    mr_asprintf(command, "mt -f %s rewind",bkpinfo->media_device);
718    res += run_program_and_log_output(command, 1);
719    paranoid_free(command);
720
721    set_tape_block_size_with_mt(512);
722
723    mr_asprintf(command, "dd if=/dev/zero of=%s bs=512 count=20",bkpinfo->media_device);
724    res += run_program_and_log_output(command, 1);
725    paranoid_free(command);
726
727    /* OBDR: then ISO boot image bs = 2048 */
728    set_tape_block_size_with_mt(2048);
729
730    mr_asprintf(command, "dd if=%s of=%s bs=2048",MINDI_CACHE"/mondorescue.iso",bkpinfo->media_device);
731    res += run_program_and_log_output(command, 1);
732    paranoid_free(command);
733
734    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
735    return(res);
736}
737
738
739/**
740 * Open the tape device for input.
741 * @param bkpinfo The backup information structure. Fields used:
742 * - @c bkpinfo->media_device
743 * - @c bkpinfo->tmpdir
744 * @return 0 for success, nonzero for failure.
745 * @note This will also work with a cdstream for now, but don't count on this behavior.
746 */
747int openin_tape()
748{
749    /*@ buffer ***************************************************** */
750    char fname[MAX_STR_LEN];
751    char *datablock;
752    char *tmp = NULL;
753    char old_cwd[MAX_STR_LEN];
754    char *outfname = NULL;
755    /*@ int ******************************************************* */
756    int i;
757    int j;
758    int res = 0;
759    long length, templong;
760    size_t k;
761    int retval = 0;
762    int ctrl_chr;
763
764    /*@ long long ************************************************* */
765    long long size;
766
767    /*@ pointers ************************************************** */
768    FILE *fout;
769
770    /*@ end vars *************************************************** */
771
772    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
773    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
774        fatal_error("Cannot alloc mem for tape catalog");
775    }
776    g_tapecatalog->entries = 0;
777    g_tape_posK = 0;
778    if (g_tape_stream) {
779        log_it("FYI - I won't 'openin' the tape. It's already open.");
780        return (0);
781    }
782
783    // mondoarchive should have configured everything to give the right non-rew device
784    if ((bkpinfo->use_obdr) && (bkpinfo->media_device != NULL)) {
785        res = skip_obdr();
786        if (res != 0) {
787            log_it("Not able to skip OBDR - Restore will have to be done manually");
788        }
789    } else {
790        if (bkpinfo->media_device == NULL) {
791            log_it("Not able to skip OBDR - Restore will have to be done manually");
792        }
793        set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
794    }
795
796    insist_on_this_tape_number(1);
797    mr_asprintf(outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
798    make_hole_for_file(outfname);
799
800//  start_buffer_process( bkpinfo->media_device, g_tape_fifo, FALSE);
801    log_it("Opening IN tape");
802    if (!
803        (g_tape_stream =
804         open_device_via_buffer(bkpinfo->media_device, 'r',
805                                bkpinfo->internal_tape_block_size))) {
806        log_OS_error(g_tape_fifo);
807        log_to_screen("Cannot openin stream device");
808        mr_free(outfname);
809        return (1);
810    }
811    log_to_screen("Reading stream");
812    log_it("stream device = '%s'", bkpinfo->media_device);
813/* skip data disks */
814    open_evalcall_form("Skipping data disks on stream");
815    log_to_screen("Skipping data disks on stream");
816    if (!(fout = fopen(outfname, "w"))) {
817        log_OS_error(outfname);
818        log_to_screen("Cannot openout datadisk all.tar.gz file");
819        mr_free(outfname);
820        return (-1);
821    }
822    if (!(datablock = (char *) malloc(256 * 1024))) {
823        log_to_screen("Unable to malloc 256*1024");
824        mr_free(outfname);
825        finish(1);
826    }
827    for (i = 0; i < 32; i++) {
828        for (j = 0; j < 4; j++) {
829            for (length = 0, k = 0; length < 256 * 1024; length += k) {
830                k = fread(datablock + length, 1, 256 * 1024 - length,
831                          g_tape_stream);
832            }
833            (void) fwrite(datablock, 1, (size_t) length, fout);
834            g_tape_posK += length / 1024;
835        }
836        if (i > 8)              // otherwise, 'buffer' distorts calculations
837        {
838            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
839            update_evalcall_form((int) (templong));
840        }
841    }
842    paranoid_fclose(fout);
843    paranoid_free(datablock);
844
845/* find initial blocks */
846    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
847    retval += res;
848    if (ctrl_chr != BLK_START_OF_TAPE) {
849        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
850    }
851    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
852    retval += res;
853    if (ctrl_chr != BLK_START_OF_BACKUP) {
854        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
855    }
856    close_evalcall_form();
857    log_it("Saved all.tar.gz to '%s'", outfname);
858    (void) getcwd(old_cwd, MAX_STR_LEN);
859    chdir(bkpinfo->tmpdir);
860    mr_asprintf(tmp, "tar -zxf %s ./tmp/mondo-restore.cfg 2> /dev/null", outfname);
861    paranoid_system(tmp);
862    mr_free(tmp);
863
864    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
865    chdir(old_cwd);
866    unlink(outfname);
867    mr_free(outfname);
868    return (retval);
869}
870
871
872/**
873 * Start writing to a CD stream.
874 * @param cddev The CD device to openout via cdrecord.
875 * @param speed The speed to write at.
876 * @return 0 for success, nonzero for failure.
877 * @note This should be called only from backup processes.
878 */
879int openout_cdstream(char *cddev, int speed)
880{
881    /*@ buffers ***************************************************** */
882    char *command = NULL;
883
884    /*@ end vars *************************************************** */
885
886    /*  add 'dummy' if testing */
887    mr_asprintf(command, "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s", cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
888    /*  initialise the catalog */
889    g_current_media_number = 1;
890    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
891        fatal_error("Cannot alloc mem for tape catalog");
892    }
893    g_tapecatalog->entries = 0;
894    /* log stuff */
895    log_it("Opening OUT cdstream with the command");
896    log_it(command);
897    /*  log_it("Let's see what happens, shall we?"); */
898    g_tape_stream = popen(command, "w");
899    mr_free(command);
900
901    if (g_tape_stream) {
902        return (0);
903    } else {
904        log_to_screen("Failed to openout to cdstream (fifo)");
905        return (1);
906    }
907}
908
909
910/**
911 * Start writing to a tape device for the backup.
912 * Handle OBDR if we were asked to do so
913 * @param tapedev The tape device to open for writing.
914 * @return 0 for success, nonzero for failure.
915 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
916 * EXISTING DATA on the tape!
917 */
918int openout_tape() {
919
920g_current_media_number = 1;
921if (g_tape_stream) {
922    log_it("FYI - I won't 'openout' the tape. It's already open.");
923    return (0);
924}
925if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
926    fatal_error("Cannot alloc mem for tape catalog");
927}
928g_tapecatalog->entries = 0;
929g_tape_posK = 0;
930
931if (bkpinfo->use_obdr) {
932    create_obdr();
933} else {
934    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
935}
936log_it("Opening OUT tape");
937if (!
938    (g_tape_stream =
939     open_device_via_buffer(bkpinfo->media_device, 'w', bkpinfo->internal_tape_block_size))) {
940    log_OS_error(g_tape_fifo);
941    log_to_screen("Cannot openin stream device");
942    return (1);
943}
944return (0);
945}
946
947
948
949
950/**
951 * Copy a file from the opened stream (CD or tape) to @p outfile.
952 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
953 * @param outfile The file to write to.
954 * @param size The size of the file in the input stream.
955 * @return 0 for success, nonzero for failure.
956 */
957int
958read_file_from_stream_to_file(char *outfile, long long size)
959{
960
961    /*@ int ******************************************************** */
962    int res;
963
964    /*@ end vars *************************************************** */
965
966    res = read_file_from_stream_FULL(outfile, NULL, size);
967
968    return (res);
969}
970
971
972
973/**
974 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
975 * by @p fout.
976 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
977 * @param fout The stream to write the file to.
978 * @param size The size of the file in bytes.
979 * @return 0 for success, nonzero for failure.
980 */
981int
982read_file_from_stream_to_stream(FILE * fout, long long size)
983{
984
985    /*@ int ******************************************************** */
986    int res;
987
988    /*@ end vars *************************************************** */
989
990    res = read_file_from_stream_FULL(NULL, fout, size);
991/*  fflush(g_tape_stream);
992  fflush(fout);*/
993    return (res);
994}
995
996
997
998/**
999 * Copy a file from the currently opened stream (CD or tape) to either a
1000 * @c FILE pointer indicating a currently-opened file, or a filename indicating
1001 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
1002 * and read_file_from_stream_to_stream() are wrappers for.
1003 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1004 * @param outfname If non-NULL, write to this file.
1005 * @param foutstream If non-NULL, write to this stream.
1006 * @param orig_size The original length of the file in bytes.
1007 * @return 0 for success, nonzero for failure.
1008 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
1009 */
1010int
1011read_file_from_stream_FULL(char *outfname, FILE * foutstream, long long orig_size)
1012{
1013    /*@ buffers ***************************************************** */
1014    char *datablock;
1015    char *temp_fname;
1016    char *temp_cksum;
1017    char *actual_cksum = NULL;
1018
1019    /*@ int ********************************************************* */
1020    int retval = 0;
1021#ifdef EXTRA_TAPE_CHECKSUMS
1022    int i, ch;
1023#endif
1024    int noof_blocks;
1025    int ctrl_chr;
1026    int res;
1027    /*@ pointers **************************************************** */
1028    FILE *fout;
1029
1030    /*@ long    ***************************************************** */
1031    long bytes_to_write = 0L /*,i */ ;
1032//  long bytes_successfully_read_in_this_time = 0;
1033
1034    /*@ long long *************************************************** */
1035    long long temp_size, size;
1036    long bytes_read, bytes_to_read;
1037    long long total_read_from_tape_for_this_file = 0;
1038    long long where_I_was_before_tape_change = 0;
1039    /*@ unsigned int ************************************************ */
1040    /*  unsigned int ch; */
1041    unsigned int crc16;
1042    unsigned int crctt;
1043
1044    bool had_to_resync = FALSE;
1045
1046    /*@ init  ******************************************************* */
1047    malloc_string(temp_fname);
1048    malloc_string(temp_cksum);
1049    datablock = malloc(TAPE_BLOCK_SIZE);
1050    crc16 = 0;
1051    crctt = 0;
1052    size = orig_size;
1053
1054    /*@ end vars *************************************************** */
1055
1056    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1057    if (orig_size != temp_size && orig_size != -1) {
1058        log_to_screen("output file's size should be %ld K but is apparently %ld K", (long) size >> 10, (long) temp_size >> 10);
1059    }
1060    if (ctrl_chr != BLK_START_FILE) {
1061        wrong_marker(BLK_START_FILE, ctrl_chr);
1062        return (1);
1063    }
1064
1065    if (foutstream) {
1066        fout = foutstream;
1067    } else {
1068        fout = fopen(outfname, "w");
1069    }
1070    if (!fout) {
1071        log_OS_error(outfname);
1072        log_to_screen("Cannot openout file");
1073        return (1);
1074    }
1075    total_read_from_tape_for_this_file = 0;
1076    for (noof_blocks = 0; size > 0;
1077         noof_blocks++, size -=
1078         bytes_to_write, total_read_from_tape_for_this_file +=
1079         bytes_read) {
1080        bytes_to_write =
1081            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1082        bytes_to_read = TAPE_BLOCK_SIZE;
1083        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1084        while (bytes_read < bytes_to_read) {    // next tape!
1085//    crctt=crc16=0;
1086            where_I_was_before_tape_change = size;
1087            log_msg(4, "where_I_was_... = %lld",
1088                    where_I_was_before_tape_change);
1089            start_to_read_from_next_tape();
1090            log_msg(4, "Started reading from next tape.");
1091            skip_incoming_files_until_we_find_this_one(temp_fname);
1092            log_msg(4, "Skipped irrelevant files OK.");
1093            for (size = orig_size; size > where_I_was_before_tape_change;
1094                 size -= bytes_to_write) {
1095                bytes_read =
1096                    fread(datablock, 1, bytes_to_read, g_tape_stream);
1097            }
1098            log_msg(4, "'size' is now %lld (should be %lld)", size,
1099                    where_I_was_before_tape_change);
1100            log_to_screen("Successfully re-sync'd tape");
1101            had_to_resync = TRUE;
1102            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1103        }
1104
1105        (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
1106
1107#ifdef EXTRA_TAPE_CHECKSUMS
1108        for (i = 0; i < (int) bytes_to_write; i++) {
1109            ch = datablock[i];
1110            crc16 = updcrcr(crc16, (unsigned) ch);
1111            crctt = updcrc(crctt, (unsigned) ch);
1112        }
1113#endif
1114    }
1115    log_msg(6, "Total read from tape for this file = %lld",
1116            total_read_from_tape_for_this_file);
1117    log_msg(6, ".......................... Should be %lld", orig_size);
1118    g_tape_posK += total_read_from_tape_for_this_file / 1024;
1119    mr_asprintf(actual_cksum, "%04x%04x", crc16, crctt);
1120    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
1121    } else {
1122        paranoid_fclose(fout);
1123    }
1124    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
1125    if (ctrl_chr != BLK_STOP_FILE) {
1126        wrong_marker(BLK_STOP_FILE, ctrl_chr);
1127    }
1128    if (strcmp(temp_cksum, actual_cksum)) {
1129        log_to_screen("actual cksum=%s; recorded cksum=%s", actual_cksum, temp_cksum);
1130        log_to_screen("%s (%ld K) is corrupt on tape", temp_fname, (long) orig_size >> 10);
1131        retval++;
1132    }
1133    mr_free(actual_cksum);
1134
1135    paranoid_free(datablock);
1136    paranoid_free(temp_fname);
1137    paranoid_free(temp_cksum);
1138    return (retval);
1139}
1140
1141
1142
1143/**
1144 * Read a header block from the currently opened stream (CD or tape).
1145 * This block indicates the length of the following file (if it's file-related)
1146 * the filename (if it's file-related), and the block type.
1147 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
1148 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
1149 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
1150 * @return 0 for success, nonzero for failure.
1151 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
1152 */
1153int
1154read_header_block_from_stream(long long *plen, char *filename,
1155                              int *pcontrol_char)
1156{
1157
1158    /*@ buffers ***************************************************** */
1159    char *tempblock;
1160
1161    /*@ int ********************************************************* */
1162    int i, retval;
1163
1164    /*@ end vars *************************************************** */
1165
1166    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
1167
1168    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1169        tempblock[i] = 0;
1170    }
1171    while (!(*pcontrol_char = tempblock[7000])) {
1172        g_tape_posK +=
1173            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1174                  g_tape_stream) / 1024;
1175    }
1176/*  memcpy((char*)plength_of_incoming_file,(char*)tempblock+7001,sizeof(long long)); */
1177/*  for(*plen=0,i=7;i>=0;i--) {*plen<<=8; *plen |= tempblock[7001+i];} */
1178    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1179    if (strcmp(tempblock + 6000 + *pcontrol_char, STR_HEADER)) {
1180        log_it("Bad header block at %ld K", (long) g_tape_posK);
1181    }
1182    strcpy(filename, tempblock + 1000);
1183/*  strcpy(cksum,tempblock+5555);*/
1184/*  log_it( "%s  (reading) fname=%s, filesize=%ld K",
1185       marker_to_string (*pcontrol_char), filename,
1186       (long) ((*plen) >> 10));
1187*/
1188    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1189        log_to_screen("I can't verify an aborted backup.");
1190        retval = 1;
1191    } else {
1192        retval = 0;
1193    }
1194    for (i = 1000; i < 1020; i++) {
1195        if (tempblock[i] < 32 || tempblock[i] > 126) {
1196            tempblock[i] = ' ';
1197        }
1198    }
1199    tempblock[i] = '\0';
1200    log_msg(6, "%s (fname=%s, size=%ld K)",
1201            marker_to_string(*pcontrol_char), tempblock + 1000,
1202            (long) (*plen) >> 10);
1203    paranoid_free(tempblock);
1204    return (retval);
1205}
1206
1207
1208
1209/**
1210 * Add specified file/slice to the internal catalog of all archives written.
1211 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1212 * write the last [buffer size] MB from the catalog to the new tape, so we know
1213 * we have @e all archives on some CD/tape/whatever.
1214 * @param type The type of file we're cataloging (afioball, slice, something else)
1215 * @param number The fileset number or biggiefile number.
1216 * @param aux The slice number if it's a biggiefile, or any other additional info.
1217 * @param fn The original full pathname of the file we're recording.
1218 * @return The index of the record we just added.
1219 */
1220int register_in_tape_catalog(t_archtype type, int number, long aux,
1221                             char *fn)
1222{
1223    int last;
1224    char fname[MAX_TAPECAT_FNAME_LEN+1];
1225    char *p;
1226
1227    p = strrchr(fn, '/');
1228    if (p) {
1229        p++;
1230    } else {
1231        p = fn;
1232    }
1233    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1234    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1235    last = g_tapecatalog->entries;
1236    if (last >= MAX_TAPECATALOG_ENTRIES) {
1237        log_it
1238            ("Warning - can't log #%d in tape catalog - too many entries already",
1239             number);
1240        return (-1);
1241    }
1242    g_tapecatalog->el[last].type = type;
1243    g_tapecatalog->el[last].number = number;
1244    g_tapecatalog->el[last].aux = aux;
1245    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1246    strcpy(g_tapecatalog->el[last].fname, fname);
1247    g_tapecatalog->entries++;
1248    return (last);              // returns the index of the record we've jsut added
1249}
1250
1251
1252
1253
1254/**
1255 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1256 * (got SIGPIPE) or look like we will.
1257 * @param mediasize The size of the tape in megabytes.
1258 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1259 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1260 * autodetecting the size. Huh?
1261 */
1262
1263/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1264bool
1265should_we_write_to_next_tape(long mediasize,
1266                             off_t length_of_incoming_file)
1267{
1268    /*@ bool's ***************************************************** */
1269    bool we_need_a_new_tape = FALSE;
1270
1271    /*@ end vars *************************************************** */
1272
1273    if (mediasize == 0) {
1274        return (FALSE);
1275    }
1276    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1277        log_it("mediasize = %ld", mediasize);
1278        we_need_a_new_tape = TRUE;
1279        log_to_screen("Should have started a new tape/CD already");
1280    }
1281    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1282        mediasize - (SLICE_SIZE * 4 / 1024)) {
1283        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1284               mediasize);
1285        we_need_a_new_tape = TRUE;
1286    }
1287    return (we_need_a_new_tape);
1288}
1289
1290
1291/**
1292 * Seek through the stream until we find a header block where the NAME field matches
1293 * @p the_file_I_was_reading. This is useful if you've just started reading from
1294 * a new tape and want to find the file you were reading when the tape ended.
1295 * @param the_file_I_was_reading File name to look for.
1296 * @return 0 for success, nonzero for failure.
1297 */
1298int skip_incoming_files_until_we_find_this_one(char
1299                                               *the_file_I_was_reading)
1300{
1301    char *pA;
1302    char *pB;
1303    int res;
1304    int ctrl_chr;
1305    char *temp_fname;
1306    char *datablock;
1307    long long temp_size, size;
1308    long bytes_to_write;
1309
1310    datablock = malloc(TAPE_BLOCK_SIZE);
1311    malloc_string(temp_fname);
1312    pB = strrchr(the_file_I_was_reading, '/');
1313    if (pB) {
1314        pB++;
1315    } else {
1316        pB = the_file_I_was_reading;
1317    }
1318    log_msg(1, "skip_incoming_..(%s)", pB);
1319    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1320    ctrl_chr = -1;
1321    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1322        res =
1323            read_header_block_from_stream(&temp_size, temp_fname,
1324                                          &ctrl_chr);
1325        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1326            break;
1327        }
1328        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1329        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1330        log_msg(3, "Still trying to re-sync w/ tape");
1331    }
1332    while (ctrl_chr != BLK_START_FILE) {
1333        res =
1334            read_header_block_from_stream(&temp_size, temp_fname,
1335                                          &ctrl_chr);
1336        if (ctrl_chr == BLK_START_FILE) {
1337            break;
1338        }
1339        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1340        wrong_marker(BLK_START_FILE, ctrl_chr);
1341        log_msg(3, "Still trying to re-sync w/ tape");
1342    }
1343    pA = strrchr(temp_fname, '/');
1344    if (pA) {
1345        pA++;
1346    } else {
1347        pA = temp_fname;
1348    }
1349    pB = strrchr(the_file_I_was_reading, '/');
1350    if (pB) {
1351        pB++;
1352    } else {
1353        pB = the_file_I_was_reading;
1354    }
1355    while (strcmp(pA, pB)) {
1356        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1357                the_file_I_was_reading);
1358        for (size = temp_size; size > 0; size -= bytes_to_write) {
1359            bytes_to_write =
1360                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1361            // FIXME - needs error-checking and -catching
1362            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1363        }
1364        res =
1365            read_header_block_from_stream(&temp_size, temp_fname,
1366                                          &ctrl_chr);
1367        if (ctrl_chr != BLK_STOP_FILE) {
1368            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1369        }
1370        res =
1371            read_header_block_from_stream(&temp_size, temp_fname,
1372                                          &ctrl_chr);
1373        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1374            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1375        }
1376        res =
1377            read_header_block_from_stream(&temp_size, temp_fname,
1378                                          &ctrl_chr);
1379        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1380            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1381        }
1382        res =
1383            read_header_block_from_stream(&temp_size, temp_fname,
1384                                          &ctrl_chr);
1385        if (ctrl_chr != BLK_START_FILE) {
1386            wrong_marker(BLK_START_FILE, ctrl_chr);
1387        }
1388        pA = strrchr(temp_fname, '/');
1389        if (pA) {
1390            pA++;
1391        } else {
1392            pA = temp_fname;
1393        }
1394        pB = strrchr(the_file_I_was_reading, '/');
1395        if (pB) {
1396            pB++;
1397        } else {
1398            pB = the_file_I_was_reading;
1399        }
1400    }
1401    log_msg(2, "Reading %s (it matches %s)", temp_fname,
1402            the_file_I_was_reading);
1403    paranoid_free(temp_fname);
1404    paranoid_free(datablock);
1405    return (0);
1406}
1407
1408
1409/**
1410 * Start to read from the next tape. Assumes the user has already inserted it.
1411 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1412 * @return 0 for success, nonzero for failure.
1413 */
1414int start_to_read_from_next_tape()
1415{
1416    /*@ int ********************************************************* */
1417    int res = 0;
1418    char *sz_msg;
1419    int ctrlchr;
1420    long long temp_size;
1421    malloc_string(sz_msg);
1422    /*@ end vars *************************************************** */
1423
1424    paranoid_pclose(g_tape_stream);
1425    sync();
1426    sync();
1427    sync();
1428    log_it("Next tape requested.");
1429    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1430    log_it("Opening IN the next tape");
1431    if (!
1432        (g_tape_stream =
1433         open_device_via_buffer(bkpinfo->media_device, 'r',
1434                                bkpinfo->internal_tape_block_size))) {
1435        log_OS_error(g_tape_fifo);
1436        log_to_screen("Cannot openin stream device");
1437        return (1);
1438    }
1439    g_tape_posK = 0;
1440    g_sigpipe = FALSE;
1441    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1442    if (ctrlchr != BLK_START_OF_TAPE) {
1443        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1444    }
1445    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1446    if (ctrlchr != BLK_START_OF_BACKUP) {
1447        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1448    } else {
1449        log_msg(3, "Next tape opened OK. Whoopee!");
1450    }
1451    paranoid_free(sz_msg);
1452    return (res);
1453}
1454
1455
1456
1457/**
1458 * Start to write to the next tape. Assume the user has already inserted it.
1459 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1460 * @return 0 for success, nonzero for failure.
1461 */
1462int start_to_write_to_next_tape()
1463{
1464    int res = 0;
1465    char *command = NULL;
1466
1467    paranoid_pclose(g_tape_stream);
1468    system("sync");
1469    system("sync");
1470    system("sync");
1471    log_it("New tape requested.");
1472    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1473    if (g_current_media_number > MAX_NOOF_MEDIA) {
1474        res++;
1475        log_to_screen("Too many tapes. Man, you need to use nfs!");
1476    }
1477    if (bkpinfo->backup_media_type == cdstream) {
1478        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);
1479        log_it("Opening OUT to next CD with the command");
1480        log_it(command);
1481        log_it("Let's see what happens, shall we?");
1482        g_tape_stream = popen(command, "w");
1483        mr_free(command);
1484
1485        if (!g_tape_stream) {
1486            log_to_screen("Failed to openout to cdstream (fifo)");
1487            return (1);
1488        }
1489    } else {
1490        log_it("Opening OUT to next tape");
1491        if (!
1492            (g_tape_stream =
1493             open_device_via_buffer(bkpinfo->media_device, 'w',
1494                                    bkpinfo->internal_tape_block_size))) {
1495            log_OS_error(g_tape_fifo);
1496            log_to_screen("Cannot openin stream device");
1497            return (1);
1498        }
1499    }
1500    g_tape_posK = 0;
1501    g_sigpipe = FALSE;
1502    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1503    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1504    return (res);
1505}
1506
1507
1508
1509
1510/**
1511 * Write a bufferfull of the most recent archives to the tape. The
1512 * rationale behind this is a bit complex. If the previous tape ended
1513 * suddenly (EOF or otherwise) some archives were probably left in the
1514 * buffer. That means that Mondo thinks they have been written, but
1515 * the external binary @c buffer has not actually written them. So to
1516 * be safe, we start the new tape by writing the last bufferfull from
1517 * the old one. This insures that all archives will be on at least
1518 * one tape. Sounds inelegant, but it works.
1519 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1520 * @return 0 for success, nonzero for failure.
1521 */
1522int write_backcatalog_to_tape()
1523{
1524    int i, last, res = 0;
1525    char *fname = NULL;
1526
1527    log_msg(2, "I am now writing back catalog to tape");
1528    last = g_tapecatalog->entries - 1;
1529    for (i = 0; i <= last; i++) {
1530        mr_asprintf(fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir, g_tapecatalog->el[i].fname);
1531        if (!does_file_exist(fname)) {
1532            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1533        } else {
1534            write_header_block_to_stream(length_of_file(fname),
1535                                         "start-backcatalog-afio-or-slice",
1536                                         BLK_START_AN_AFIO_OR_SLICE);
1537            log_msg(2, "Writing %s", fname);
1538            if (write_file_to_stream_from_file(fname)) {
1539                res++;
1540                log_msg(2, "%s failed", fname);
1541            }
1542            if (i != last) {
1543                write_header_block_to_stream((off_t)0,
1544                                             "stop-backcatalog-afio-or-slice",
1545                                             BLK_STOP_AN_AFIO_OR_SLICE);
1546            }
1547        }
1548        mr_free(fname);
1549    }
1550    log_msg(2, "Finished writing back catalog to tape");
1551    return (res);
1552}
1553
1554
1555
1556/**
1557 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1558 * @param fname The path to all.tar.gz.
1559 * @return 0 for success, nonzero for failure.
1560 */
1561int write_data_disks_to_stream(char *fname)
1562{
1563    /*@ pointers *************************************************** */
1564    FILE *fin;
1565
1566    /*@ long ******************************************************* */
1567    long m = -1;
1568    long templong;
1569
1570    /*@ int ******************************************************** */
1571    int i, j;
1572
1573    /*@ buffers **************************************************** */
1574    char tempblock[256 * 1024];
1575
1576    /*@ end vars *************************************************** */
1577
1578    open_evalcall_form("Writing data disks to tape");
1579    log_to_screen("Writing data disks to tape");
1580    log_it("Data disks = %s", fname);
1581    if (!does_file_exist(fname)) {
1582        log_to_screen("Cannot find %s", fname);
1583        return (1);
1584    }
1585    if (!(fin = fopen(fname, "r"))) {
1586        log_OS_error(fname);
1587        fatal_error("Cannot openin the data disk");
1588    }
1589    for (i = 0; i < 32; i++) {  /* 32MB */
1590        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1591            if (!feof(fin)) {
1592                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1593            } else {
1594                m = 0;
1595            }
1596            for (; m < 256 * 1024; m++) {
1597                tempblock[m] = '\0';
1598            }
1599            g_tape_posK +=
1600                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1601        }
1602        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1603        {
1604            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1605            update_evalcall_form((int) (templong));
1606        }
1607    }
1608    paranoid_fclose(fin);
1609    close_evalcall_form();
1610    return (0);
1611}
1612
1613
1614
1615
1616/**
1617 * Copy @p infile to the opened stream (CD or tape).
1618 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1619 * @param infile The file to write to the stream.
1620 * @return 0 for success, nonzero for failure.
1621 */
1622int write_file_to_stream_from_file(char *infile)
1623{
1624    /*@ buffers **************************************************** */
1625    char datablock[TAPE_BLOCK_SIZE];
1626    char *checksum = NULL;
1627    char *infile_basename;
1628
1629    /*@ int ******************************************************** */
1630    int retval = 0;
1631    int noof_blocks;
1632
1633    /*  unsigned int ch; */
1634    unsigned int crc16;
1635    unsigned int crctt;
1636
1637    /*@ pointers *************************************************** */
1638    FILE *fin;
1639    char *p;
1640
1641    /*@ long ******************************************************* */
1642    long bytes_to_read = 0;
1643    long i;
1644
1645    off_t filesize;
1646
1647#ifdef EXTRA_TAPE_CHECKSUMS
1648    int ch;
1649#endif
1650
1651    /*@ initialize ************************************************ */
1652    crc16 = 0;
1653    crctt = 0;
1654
1655
1656
1657    /*@ end vars *************************************************** */
1658
1659    infile_basename = strrchr(infile, '/');
1660    if (infile_basename) {
1661        infile_basename++;
1662    } else {
1663        infile_basename = infile;
1664    }
1665    filesize = length_of_file(infile);
1666    if (should_we_write_to_next_tape
1667        (bkpinfo->media_size[g_current_media_number], filesize)) {
1668        start_to_write_to_next_tape();
1669        write_backcatalog_to_tape();
1670    }
1671    p = strrchr(infile, '/');
1672    if (!p) {
1673        p = infile;
1674    } else {
1675        p++;
1676    }
1677    log_it("Writing file '%s' to tape (%ld KB)", p, (long) filesize >> 10);
1678    write_header_block_to_stream(filesize, infile_basename,
1679                                 BLK_START_FILE);
1680//go_here_to_restart_saving_of_file:
1681    if (!(fin = fopen(infile, "r"))) {
1682        log_OS_error(infile);
1683        return (1);
1684    }
1685    for (noof_blocks = 0; filesize > 0;
1686         noof_blocks++, filesize -= bytes_to_read) {
1687        if (filesize < TAPE_BLOCK_SIZE) {
1688            bytes_to_read = (long) filesize;
1689            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1690                datablock[i] = '\0';
1691            }
1692        } else {
1693            bytes_to_read = TAPE_BLOCK_SIZE;
1694        }
1695        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1696        g_tape_posK +=
1697            fwrite(datablock, 1, /*bytes_to_read */ 
1698                   (size_t) TAPE_BLOCK_SIZE,
1699                   g_tape_stream) / 1024;
1700        if (g_sigpipe) {
1701            log_it("Sigpipe occurred recently. I'll start a new tape.");
1702            fclose(fin);
1703            g_sigpipe = FALSE;
1704            start_to_write_to_next_tape();
1705            write_backcatalog_to_tape();    // kinda-sorta recursive :)
1706            return (0);
1707        }
1708#ifdef EXTRA_TAPE_CHECKSUMS
1709        for (i = 0; i < bytes_to_read; i++) {
1710            ch = datablock[i];
1711            crc16 = updcrcr(crc16, (unsigned) ch);
1712            crctt = updcrc(crctt, (unsigned) ch);
1713        }
1714#endif
1715    }
1716    paranoid_fclose(fin);
1717    mr_asprintf(checksum, "%04x%04x", crc16, crctt);
1718    /* BERLIOS: what does it do ??? */
1719    write_header_block_to_stream((off_t)g_current_media_number, checksum, BLK_STOP_FILE);
1720    mr_free(checksum);
1721
1722//  log_it("File '%s' written to tape.", infile);
1723    return (retval);
1724}
1725
1726
1727
1728
1729
1730/**
1731 * Write a header block to the opened stream (CD or tape).
1732 * @param length_of_incoming_file The length to store in the header block.
1733 * Usually matters only if this is a file-related header, in which case it should
1734 * be the length of the file that will follow.
1735 * @param filename The filename to store in the header block. Usually matters
1736 * only if this is a file-related header, in which case this should be the name
1737 * if the file that will follow.
1738 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1739 * @return 0 for success, nonzero for failure.
1740 */
1741int
1742write_header_block_to_stream(off_t length_of_incoming_file,
1743                             char *filename, int control_char)
1744{
1745    /*@ buffers **************************************************** */
1746    char tempblock[TAPE_BLOCK_SIZE];
1747    char *p;
1748
1749    /*@ int ******************************************************** */
1750    int i;
1751
1752    off_t olen;
1753
1754    /*@ end vars *************************************************** */
1755
1756
1757    olen = length_of_incoming_file;
1758    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1759    if (!p) {
1760        p = filename;
1761    } else {
1762        p++;
1763    }
1764    if (!g_tape_stream) {
1765        log_to_screen("You're not backing up to tape. Why write a tape header?");
1766        return (1);
1767    }
1768    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1769        tempblock[i] = 0;
1770    }
1771    sprintf(tempblock + 6000 + control_char, STR_HEADER);
1772    tempblock[7000] = control_char;
1773    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1774    strcpy(tempblock + 1000, filename);
1775    g_tape_posK += fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream) / 1024;
1776    log_msg(6, "%s (fname=%s, size=%ld K)", marker_to_string(control_char), p, (long) length_of_incoming_file >> 10);
1777    return (0);
1778}
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789/**
1790 * Log (to screen) an erroneous marker, along with what it should have been.
1791 * @param should_be What we were expecting.
1792 * @param it_is What we got.
1793 */
1794void wrong_marker(int should_be, int it_is)
1795{
1796    log_to_screen("Wrong marker! (Should be %s, is actually %s)", marker_to_string(should_be), marker_to_string(it_is));
1797}
1798
1799/* @} - end of streamGroup */
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