source: branches/2.2.10/mondo/src/common/libmondo-stream.c @ 2323

Last change on this file since 2323 was 2323, checked in by Bruno Cornec, 11 years ago

r3334@localhost: bruno | 2009-08-08 12:17:37 +0200

  • Change mr_asprintf interface to pass only the char * (makes bkpinfo usage more easy)
  • Property svn:keywords set to Id
File size: 51.2 KB
Line 
1/* libmondo-stream.c
2   $Id: libmondo-stream.c 2323 2009-08-18 13:05:43Z 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 2323 2009-08-18 13:05:43Z 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 *tmp = NULL;
1015    char *datablock;
1016    char *temp_fname;
1017    char *temp_cksum;
1018    char *actual_cksum = NULL;
1019//  char *pA, *pB;
1020
1021    /*@ int ********************************************************* */
1022    int retval = 0;
1023#ifdef EXTRA_TAPE_CHECKSUMS
1024    int i, ch;
1025#endif
1026    int noof_blocks;
1027    int ctrl_chr;
1028    int res;
1029    /*@ pointers **************************************************** */
1030    FILE *fout;
1031
1032    /*@ long    ***************************************************** */
1033    long bytes_to_write = 0L /*,i */ ;
1034//  long bytes_successfully_read_in_this_time = 0;
1035
1036    /*@ long long *************************************************** */
1037    long long temp_size, size;
1038    long bytes_read, bytes_to_read;
1039    long long total_read_from_tape_for_this_file = 0;
1040    long long where_I_was_before_tape_change = 0;
1041    /*@ unsigned int ************************************************ */
1042    /*  unsigned int ch; */
1043    unsigned int crc16;
1044    unsigned int crctt;
1045
1046    bool had_to_resync = FALSE;
1047
1048    /*@ init  ******************************************************* */
1049    malloc_string(temp_fname);
1050    malloc_string(temp_cksum);
1051    datablock = malloc(TAPE_BLOCK_SIZE);
1052    crc16 = 0;
1053    crctt = 0;
1054    size = orig_size;
1055
1056    /*@ end vars *************************************************** */
1057
1058    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1059    if (orig_size != temp_size && orig_size != -1) {
1060        mr_asprintf(tmp, "output file's size should be %ld K but is apparently %ld K", (long) size >> 10, (long) temp_size >> 10);
1061        log_to_screen(tmp);
1062        mr_free(tmp);
1063    }
1064    if (ctrl_chr != BLK_START_FILE) {
1065        wrong_marker(BLK_START_FILE, ctrl_chr);
1066        return (1);
1067    }
1068
1069    if (foutstream) {
1070        fout = foutstream;
1071    } else {
1072        fout = fopen(outfname, "w");
1073    }
1074    if (!fout) {
1075        log_OS_error(outfname);
1076        log_to_screen("Cannot openout file");
1077        return (1);
1078    }
1079    total_read_from_tape_for_this_file = 0;
1080    for (noof_blocks = 0; size > 0;
1081         noof_blocks++, size -=
1082         bytes_to_write, total_read_from_tape_for_this_file +=
1083         bytes_read) {
1084        bytes_to_write =
1085            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1086        bytes_to_read = TAPE_BLOCK_SIZE;
1087        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1088        while (bytes_read < bytes_to_read) {    // next tape!
1089//    crctt=crc16=0;
1090            where_I_was_before_tape_change = size;
1091            log_msg(4, "where_I_was_... = %lld",
1092                    where_I_was_before_tape_change);
1093            start_to_read_from_next_tape();
1094            log_msg(4, "Started reading from next tape.");
1095            skip_incoming_files_until_we_find_this_one(temp_fname);
1096            log_msg(4, "Skipped irrelevant files OK.");
1097            for (size = orig_size; size > where_I_was_before_tape_change;
1098                 size -= bytes_to_write) {
1099                bytes_read =
1100                    fread(datablock, 1, bytes_to_read, g_tape_stream);
1101            }
1102            log_msg(4, "'size' is now %lld (should be %lld)", size,
1103                    where_I_was_before_tape_change);
1104            log_to_screen("Successfully re-sync'd tape");
1105            had_to_resync = TRUE;
1106            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1107        }
1108
1109        (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
1110
1111#ifdef EXTRA_TAPE_CHECKSUMS
1112        for (i = 0; i < (int) bytes_to_write; i++) {
1113            ch = datablock[i];
1114            crc16 = updcrcr(crc16, (unsigned) ch);
1115            crctt = updcrc(crctt, (unsigned) ch);
1116        }
1117#endif
1118    }
1119    log_msg(6, "Total read from tape for this file = %lld",
1120            total_read_from_tape_for_this_file);
1121    log_msg(6, ".......................... Should be %lld", orig_size);
1122    g_tape_posK += total_read_from_tape_for_this_file / 1024;
1123    mr_asprintf(actual_cksum, "%04x%04x", crc16, crctt);
1124    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
1125    } else {
1126        paranoid_fclose(fout);
1127    }
1128    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
1129    if (ctrl_chr != BLK_STOP_FILE) {
1130        wrong_marker(BLK_STOP_FILE, ctrl_chr);
1131    }
1132    if (strcmp(temp_cksum, actual_cksum)) {
1133        mr_asprintf(tmp, "actual cksum=%s; recorded cksum=%s", actual_cksum, temp_cksum);
1134        log_to_screen(tmp);
1135        mr_free(tmp);
1136
1137        mr_asprintf(tmp, "%s (%ld K) is corrupt on tape", temp_fname, (long) orig_size >> 10);
1138        log_to_screen(tmp);
1139        mr_free(tmp);
1140
1141        retval++;
1142    }
1143    mr_free(actual_cksum);
1144
1145    paranoid_free(datablock);
1146    paranoid_free(temp_fname);
1147    paranoid_free(temp_cksum);
1148    return (retval);
1149}
1150
1151
1152
1153/**
1154 * Read a header block from the currently opened stream (CD or tape).
1155 * This block indicates the length of the following file (if it's file-related)
1156 * the filename (if it's file-related), and the block type.
1157 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
1158 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
1159 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
1160 * @return 0 for success, nonzero for failure.
1161 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
1162 */
1163int
1164read_header_block_from_stream(long long *plen, char *filename,
1165                              int *pcontrol_char)
1166{
1167
1168    /*@ buffers ***************************************************** */
1169    char *tempblock;
1170
1171    /*@ int ********************************************************* */
1172    int i, retval;
1173
1174    /*@ end vars *************************************************** */
1175
1176    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
1177
1178    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1179        tempblock[i] = 0;
1180    }
1181    while (!(*pcontrol_char = tempblock[7000])) {
1182        g_tape_posK +=
1183            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1184                  g_tape_stream) / 1024;
1185    }
1186/*  memcpy((char*)plength_of_incoming_file,(char*)tempblock+7001,sizeof(long long)); */
1187/*  for(*plen=0,i=7;i>=0;i--) {*plen<<=8; *plen |= tempblock[7001+i];} */
1188    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1189    if (strcmp(tempblock + 6000 + *pcontrol_char, STR_HEADER)) {
1190        log_it("Bad header block at %ld K", (long) g_tape_posK);
1191    }
1192    strcpy(filename, tempblock + 1000);
1193/*  strcpy(cksum,tempblock+5555);*/
1194/*  log_it( "%s  (reading) fname=%s, filesize=%ld K",
1195       marker_to_string (*pcontrol_char), filename,
1196       (long) ((*plen) >> 10));
1197*/
1198    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1199        log_to_screen("I can't verify an aborted backup.");
1200        retval = 1;
1201    } else {
1202        retval = 0;
1203    }
1204    for (i = 1000; i < 1020; i++) {
1205        if (tempblock[i] < 32 || tempblock[i] > 126) {
1206            tempblock[i] = ' ';
1207        }
1208    }
1209    tempblock[i] = '\0';
1210    log_msg(6, "%s (fname=%s, size=%ld K)",
1211            marker_to_string(*pcontrol_char), tempblock + 1000,
1212            (long) (*plen) >> 10);
1213    paranoid_free(tempblock);
1214    return (retval);
1215}
1216
1217
1218
1219/**
1220 * Add specified file/slice to the internal catalog of all archives written.
1221 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1222 * write the last [buffer size] MB from the catalog to the new tape, so we know
1223 * we have @e all archives on some CD/tape/whatever.
1224 * @param type The type of file we're cataloging (afioball, slice, something else)
1225 * @param number The fileset number or biggiefile number.
1226 * @param aux The slice number if it's a biggiefile, or any other additional info.
1227 * @param fn The original full pathname of the file we're recording.
1228 * @return The index of the record we just added.
1229 */
1230int register_in_tape_catalog(t_archtype type, int number, long aux,
1231                             char *fn)
1232{
1233    int last;
1234    char fname[MAX_TAPECAT_FNAME_LEN+1];
1235    char *p;
1236
1237    p = strrchr(fn, '/');
1238    if (p) {
1239        p++;
1240    } else {
1241        p = fn;
1242    }
1243    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1244    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1245    last = g_tapecatalog->entries;
1246    if (last >= MAX_TAPECATALOG_ENTRIES) {
1247        log_it
1248            ("Warning - can't log #%d in tape catalog - too many entries already",
1249             number);
1250        return (-1);
1251    }
1252    g_tapecatalog->el[last].type = type;
1253    g_tapecatalog->el[last].number = number;
1254    g_tapecatalog->el[last].aux = aux;
1255    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1256    strcpy(g_tapecatalog->el[last].fname, fname);
1257    g_tapecatalog->entries++;
1258    return (last);              // returns the index of the record we've jsut added
1259}
1260
1261
1262
1263
1264/**
1265 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1266 * (got SIGPIPE) or look like we will.
1267 * @param mediasize The size of the tape in megabytes.
1268 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1269 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1270 * autodetecting the size. Huh?
1271 */
1272
1273/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1274bool
1275should_we_write_to_next_tape(long mediasize,
1276                             off_t length_of_incoming_file)
1277{
1278    /*@ bool's ***************************************************** */
1279    bool we_need_a_new_tape = FALSE;
1280
1281    /*@ end vars *************************************************** */
1282
1283    if (mediasize == 0) {
1284        return (FALSE);
1285    }
1286    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1287        log_it("mediasize = %ld", mediasize);
1288        we_need_a_new_tape = TRUE;
1289        log_to_screen("Should have started a new tape/CD already");
1290    }
1291    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1292        mediasize - (SLICE_SIZE * 4 / 1024)) {
1293        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1294               mediasize);
1295        we_need_a_new_tape = TRUE;
1296    }
1297    return (we_need_a_new_tape);
1298}
1299
1300
1301/**
1302 * Seek through the stream until we find a header block where the NAME field matches
1303 * @p the_file_I_was_reading. This is useful if you've just started reading from
1304 * a new tape and want to find the file you were reading when the tape ended.
1305 * @param the_file_I_was_reading File name to look for.
1306 * @return 0 for success, nonzero for failure.
1307 */
1308int skip_incoming_files_until_we_find_this_one(char
1309                                               *the_file_I_was_reading)
1310{
1311    char *pA;
1312    char *pB;
1313    int res;
1314    int ctrl_chr;
1315    char *temp_fname;
1316    char *datablock;
1317    long long temp_size, size;
1318    long bytes_to_write;
1319
1320    datablock = malloc(TAPE_BLOCK_SIZE);
1321    malloc_string(temp_fname);
1322    pB = strrchr(the_file_I_was_reading, '/');
1323    if (pB) {
1324        pB++;
1325    } else {
1326        pB = the_file_I_was_reading;
1327    }
1328    log_msg(1, "skip_incoming_..(%s)", pB);
1329    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1330    ctrl_chr = -1;
1331    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1332        res =
1333            read_header_block_from_stream(&temp_size, temp_fname,
1334                                          &ctrl_chr);
1335        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1336            break;
1337        }
1338        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1339        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1340        log_msg(3, "Still trying to re-sync w/ tape");
1341    }
1342    while (ctrl_chr != BLK_START_FILE) {
1343        res =
1344            read_header_block_from_stream(&temp_size, temp_fname,
1345                                          &ctrl_chr);
1346        if (ctrl_chr == BLK_START_FILE) {
1347            break;
1348        }
1349        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1350        wrong_marker(BLK_START_FILE, ctrl_chr);
1351        log_msg(3, "Still trying to re-sync w/ tape");
1352    }
1353    pA = strrchr(temp_fname, '/');
1354    if (pA) {
1355        pA++;
1356    } else {
1357        pA = temp_fname;
1358    }
1359    pB = strrchr(the_file_I_was_reading, '/');
1360    if (pB) {
1361        pB++;
1362    } else {
1363        pB = the_file_I_was_reading;
1364    }
1365    while (strcmp(pA, pB)) {
1366        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1367                the_file_I_was_reading);
1368        for (size = temp_size; size > 0; size -= bytes_to_write) {
1369            bytes_to_write =
1370                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1371            // FIXME - needs error-checking and -catching
1372            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1373        }
1374        res =
1375            read_header_block_from_stream(&temp_size, temp_fname,
1376                                          &ctrl_chr);
1377        if (ctrl_chr != BLK_STOP_FILE) {
1378            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1379        }
1380        res =
1381            read_header_block_from_stream(&temp_size, temp_fname,
1382                                          &ctrl_chr);
1383        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1384            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1385        }
1386        res =
1387            read_header_block_from_stream(&temp_size, temp_fname,
1388                                          &ctrl_chr);
1389        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1390            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1391        }
1392        res =
1393            read_header_block_from_stream(&temp_size, temp_fname,
1394                                          &ctrl_chr);
1395        if (ctrl_chr != BLK_START_FILE) {
1396            wrong_marker(BLK_START_FILE, ctrl_chr);
1397        }
1398        pA = strrchr(temp_fname, '/');
1399        if (pA) {
1400            pA++;
1401        } else {
1402            pA = temp_fname;
1403        }
1404        pB = strrchr(the_file_I_was_reading, '/');
1405        if (pB) {
1406            pB++;
1407        } else {
1408            pB = the_file_I_was_reading;
1409        }
1410    }
1411    log_msg(2, "Reading %s (it matches %s)", temp_fname,
1412            the_file_I_was_reading);
1413    paranoid_free(temp_fname);
1414    paranoid_free(datablock);
1415    return (0);
1416}
1417
1418
1419/**
1420 * Start to read from the next tape. Assumes the user has already inserted it.
1421 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1422 * @return 0 for success, nonzero for failure.
1423 */
1424int start_to_read_from_next_tape()
1425{
1426    /*@ int ********************************************************* */
1427    int res = 0;
1428    char *sz_msg;
1429    int ctrlchr;
1430    long long temp_size;
1431    malloc_string(sz_msg);
1432    /*@ end vars *************************************************** */
1433
1434    paranoid_pclose(g_tape_stream);
1435    sync();
1436    sync();
1437    sync();
1438    log_it("Next tape requested.");
1439    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1440    log_it("Opening IN the next tape");
1441    if (!
1442        (g_tape_stream =
1443         open_device_via_buffer(bkpinfo->media_device, 'r',
1444                                bkpinfo->internal_tape_block_size))) {
1445        log_OS_error(g_tape_fifo);
1446        log_to_screen("Cannot openin stream device");
1447        return (1);
1448    }
1449    g_tape_posK = 0;
1450    g_sigpipe = FALSE;
1451    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1452    if (ctrlchr != BLK_START_OF_TAPE) {
1453        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1454    }
1455    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1456    if (ctrlchr != BLK_START_OF_BACKUP) {
1457        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1458    } else {
1459        log_msg(3, "Next tape opened OK. Whoopee!");
1460    }
1461    paranoid_free(sz_msg);
1462    return (res);
1463}
1464
1465
1466
1467/**
1468 * Start to write to the next tape. Assume the user has already inserted it.
1469 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1470 * @return 0 for success, nonzero for failure.
1471 */
1472int start_to_write_to_next_tape()
1473{
1474    int res = 0;
1475    char *command = NULL;
1476
1477    paranoid_pclose(g_tape_stream);
1478    system("sync");
1479    system("sync");
1480    system("sync");
1481    log_it("New tape requested.");
1482    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1483    if (g_current_media_number > MAX_NOOF_MEDIA) {
1484        res++;
1485        log_to_screen("Too many tapes. Man, you need to use nfs!");
1486    }
1487    if (bkpinfo->backup_media_type == cdstream) {
1488        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);
1489        log_it("Opening OUT to next CD with the command");
1490        log_it(command);
1491        log_it("Let's see what happens, shall we?");
1492        g_tape_stream = popen(command, "w");
1493        mr_free(command);
1494
1495        if (!g_tape_stream) {
1496            log_to_screen("Failed to openout to cdstream (fifo)");
1497            return (1);
1498        }
1499    } else {
1500        log_it("Opening OUT to next tape");
1501        if (!
1502            (g_tape_stream =
1503             open_device_via_buffer(bkpinfo->media_device, 'w',
1504                                    bkpinfo->internal_tape_block_size))) {
1505            log_OS_error(g_tape_fifo);
1506            log_to_screen("Cannot openin stream device");
1507            return (1);
1508        }
1509    }
1510    g_tape_posK = 0;
1511    g_sigpipe = FALSE;
1512    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1513    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1514    return (res);
1515}
1516
1517
1518
1519
1520/**
1521 * Write a bufferfull of the most recent archives to the tape. The
1522 * rationale behind this is a bit complex. If the previous tape ended
1523 * suddenly (EOF or otherwise) some archives were probably left in the
1524 * buffer. That means that Mondo thinks they have been written, but
1525 * the external binary @c buffer has not actually written them. So to
1526 * be safe, we start the new tape by writing the last bufferfull from
1527 * the old one. This insures that all archives will be on at least
1528 * one tape. Sounds inelegant, but it works.
1529 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1530 * @return 0 for success, nonzero for failure.
1531 */
1532int write_backcatalog_to_tape()
1533{
1534    int i, last, res = 0;
1535    char *fname = NULL;
1536
1537    log_msg(2, "I am now writing back catalog to tape");
1538    last = g_tapecatalog->entries - 1;
1539    for (i = 0; i <= last; i++) {
1540        mr_asprintf(fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir, g_tapecatalog->el[i].fname);
1541        if (!does_file_exist(fname)) {
1542            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1543        } else {
1544            write_header_block_to_stream(length_of_file(fname),
1545                                         "start-backcatalog-afio-or-slice",
1546                                         BLK_START_AN_AFIO_OR_SLICE);
1547            log_msg(2, "Writing %s", fname);
1548            if (write_file_to_stream_from_file(fname)) {
1549                res++;
1550                log_msg(2, "%s failed", fname);
1551            }
1552            if (i != last) {
1553                write_header_block_to_stream((off_t)0,
1554                                             "stop-backcatalog-afio-or-slice",
1555                                             BLK_STOP_AN_AFIO_OR_SLICE);
1556            }
1557        }
1558        mr_free(fname);
1559    }
1560    log_msg(2, "Finished writing back catalog to tape");
1561    return (res);
1562}
1563
1564
1565
1566/**
1567 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1568 * @param fname The path to all.tar.gz.
1569 * @return 0 for success, nonzero for failure.
1570 */
1571int write_data_disks_to_stream(char *fname)
1572{
1573    /*@ pointers *************************************************** */
1574    FILE *fin;
1575    char *tmp = NULL;
1576
1577    /*@ long ******************************************************* */
1578    long m = -1;
1579    long templong;
1580
1581    /*@ int ******************************************************** */
1582    int i, j;
1583
1584    /*@ buffers **************************************************** */
1585    char tempblock[256 * 1024];
1586
1587    /*@ end vars *************************************************** */
1588
1589    open_evalcall_form("Writing data disks to tape");
1590    log_to_screen("Writing data disks to tape");
1591    log_it("Data disks = %s", fname);
1592    if (!does_file_exist(fname)) {
1593        mr_asprintf(tmp, "Cannot find %s", fname);
1594        log_to_screen(tmp);
1595        mr_free(tmp);
1596        return (1);
1597    }
1598    if (!(fin = fopen(fname, "r"))) {
1599        log_OS_error(fname);
1600        fatal_error("Cannot openin the data disk");
1601    }
1602    for (i = 0; i < 32; i++) {  /* 32MB */
1603        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1604            if (!feof(fin)) {
1605                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1606            } else {
1607                m = 0;
1608            }
1609            for (; m < 256 * 1024; m++) {
1610                tempblock[m] = '\0';
1611            }
1612            g_tape_posK +=
1613                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1614        }
1615        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1616        {
1617            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1618            update_evalcall_form((int) (templong));
1619        }
1620    }
1621    paranoid_fclose(fin);
1622    close_evalcall_form();
1623    return (0);
1624}
1625
1626
1627
1628
1629/**
1630 * Copy @p infile to the opened stream (CD or tape).
1631 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1632 * @param infile The file to write to the stream.
1633 * @return 0 for success, nonzero for failure.
1634 */
1635int write_file_to_stream_from_file(char *infile)
1636{
1637    /*@ buffers **************************************************** */
1638    char *tmp = NULL;
1639    char datablock[TAPE_BLOCK_SIZE];
1640    char *checksum = NULL;
1641    char *infile_basename;
1642
1643    /*@ int ******************************************************** */
1644    int retval = 0;
1645    int noof_blocks;
1646
1647    /*  unsigned int ch; */
1648    unsigned int crc16;
1649    unsigned int crctt;
1650
1651    /*@ pointers *************************************************** */
1652    FILE *fin;
1653    char *p;
1654
1655    /*@ long ******************************************************* */
1656    long bytes_to_read = 0;
1657    long i;
1658
1659    off_t filesize;
1660
1661#ifdef EXTRA_TAPE_CHECKSUMS
1662    int ch;
1663#endif
1664
1665    /*@ initialize ************************************************ */
1666    crc16 = 0;
1667    crctt = 0;
1668
1669
1670
1671    /*@ end vars *************************************************** */
1672
1673    infile_basename = strrchr(infile, '/');
1674    if (infile_basename) {
1675        infile_basename++;
1676    } else {
1677        infile_basename = infile;
1678    }
1679    filesize = length_of_file(infile);
1680    if (should_we_write_to_next_tape
1681        (bkpinfo->media_size[g_current_media_number], filesize)) {
1682        start_to_write_to_next_tape();
1683        write_backcatalog_to_tape();
1684    }
1685    p = strrchr(infile, '/');
1686    if (!p) {
1687        p = infile;
1688    } else {
1689        p++;
1690    }
1691    mr_asprintf(tmp, "Writing file '%s' to tape (%ld KB)", p, (long) filesize >> 10);
1692    log_it(tmp);
1693    mr_free(tmp);
1694    write_header_block_to_stream(filesize, infile_basename,
1695                                 BLK_START_FILE);
1696//go_here_to_restart_saving_of_file:
1697    if (!(fin = fopen(infile, "r"))) {
1698        log_OS_error(infile);
1699        return (1);
1700    }
1701    for (noof_blocks = 0; filesize > 0;
1702         noof_blocks++, filesize -= bytes_to_read) {
1703        if (filesize < TAPE_BLOCK_SIZE) {
1704            bytes_to_read = (long) filesize;
1705            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1706                datablock[i] = '\0';
1707            }
1708        } else {
1709            bytes_to_read = TAPE_BLOCK_SIZE;
1710        }
1711        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1712        g_tape_posK +=
1713            fwrite(datablock, 1, /*bytes_to_read */ 
1714                   (size_t) TAPE_BLOCK_SIZE,
1715                   g_tape_stream) / 1024;
1716        if (g_sigpipe) {
1717            log_it("Sigpipe occurred recently. I'll start a new tape.");
1718            fclose(fin);
1719            g_sigpipe = FALSE;
1720            start_to_write_to_next_tape();
1721            write_backcatalog_to_tape();    // kinda-sorta recursive :)
1722            return (0);
1723        }
1724#ifdef EXTRA_TAPE_CHECKSUMS
1725        for (i = 0; i < bytes_to_read; i++) {
1726            ch = datablock[i];
1727            crc16 = updcrcr(crc16, (unsigned) ch);
1728            crctt = updcrc(crctt, (unsigned) ch);
1729        }
1730#endif
1731    }
1732    paranoid_fclose(fin);
1733    mr_asprintf(checksum, "%04x%04x", crc16, crctt);
1734    /* BERLIOS: what does it do ??? */
1735    write_header_block_to_stream((off_t)g_current_media_number, checksum, BLK_STOP_FILE);
1736    mr_free(checksum);
1737
1738//  log_it("File '%s' written to tape.", infile);
1739    return (retval);
1740}
1741
1742
1743
1744
1745
1746/**
1747 * Write a header block to the opened stream (CD or tape).
1748 * @param length_of_incoming_file The length to store in the header block.
1749 * Usually matters only if this is a file-related header, in which case it should
1750 * be the length of the file that will follow.
1751 * @param filename The filename to store in the header block. Usually matters
1752 * only if this is a file-related header, in which case this should be the name
1753 * if the file that will follow.
1754 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1755 * @return 0 for success, nonzero for failure.
1756 */
1757int
1758write_header_block_to_stream(off_t length_of_incoming_file,
1759                             char *filename, int control_char)
1760{
1761    /*@ buffers **************************************************** */
1762    char tempblock[TAPE_BLOCK_SIZE];
1763    char *tmp = NULL;
1764    char *p;
1765
1766    /*@ int ******************************************************** */
1767    int i;
1768
1769    off_t olen;
1770
1771    /*@ end vars *************************************************** */
1772
1773
1774    olen = length_of_incoming_file;
1775    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1776    if (!p) {
1777        p = filename;
1778    } else {
1779        p++;
1780    }
1781    if (!g_tape_stream) {
1782        log_to_screen
1783            ("You're not backing up to tape. Why write a tape header?");
1784        return (1);
1785    }
1786    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1787        tempblock[i] = 0;
1788    }
1789    sprintf(tempblock + 6000 + control_char, STR_HEADER);
1790    tempblock[7000] = control_char;
1791    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1792    strcpy(tempblock + 1000, filename);
1793    g_tape_posK +=
1794        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1795               g_tape_stream) / 1024;
1796    mr_asprintf(tmp, "%s (fname=%s, size=%ld K)", marker_to_string(control_char), p, (long) length_of_incoming_file >> 10);
1797    log_msg(6, tmp);
1798    mr_free(tmp);
1799    return (0);
1800}
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811/**
1812 * Log (to screen) an erroneous marker, along with what it should have been.
1813 * @param should_be What we were expecting.
1814 * @param it_is What we got.
1815 */
1816void wrong_marker(int should_be, int it_is)
1817{
1818    /*@ buffer ***************************************************** */
1819    char *tmp = NULL;
1820
1821
1822    /*@ end vars *************************************************** */
1823    mr_asprintf(tmp, "Wrong marker! (Should be %s, is actually %s)", marker_to_string(should_be), marker_to_string(it_is));
1824    log_to_screen(tmp);
1825    mr_free(tmp);
1826}
1827
1828/* @} - end of streamGroup */
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