source: branches/2.2.10/mondo/src/common/libmondo-stream.c @ 2405

Last change on this file since 2405 was 2405, checked in by bruno, 10 years ago

Removes some malloc_string static allocation

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1/* libmondo-stream.c
2   $Id: libmondo-stream.c 2405 2009-09-17 01:45:24Z 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 2405 2009-09-17 01:45:24Z 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    sync();
137    sleep(1);
138    paranoid_pclose(g_tape_stream);
139    log_it("closein_tape() -- leaving");
140    if (!bkpinfo->please_dont_eject) {
141        eject_device(bkpinfo->media_device);
142    }
143    paranoid_free(blk);
144    paranoid_free(g_tapecatalog);
145    return (retval);
146}
147
148
149
150/**
151 * Close the global output file descriptor which Mondo has been using to write
152 * to the tape device (via buffer or dd).
153 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
154 * @return 0 for success, nonzero for failure.
155 * @note This should be called by backup processes only.
156 */
157int closeout_tape()
158{
159    /*@ int's ******************************************************* */
160    int retval = 0;
161//  int res = 0;
162//  int ctrl_chr = '\0';
163
164    /*@ buffers ***************************************************** */
165//  char fname[MAX_STR_LEN];
166
167    /*@ long long's ************************************************* */
168//  long long size;
169    int i;
170    char *blk;
171
172    blk = (char *) malloc(256 * 1024);
173
174    sleep(1);
175    sync();
176    sleep(1);
177    log_it("closeout_tape() -- entering");
178    retval +=
179        write_header_block_to_stream((off_t)0, "end-of-backup",
180                                     BLK_END_OF_BACKUP);
181    retval += write_header_block_to_stream((off_t)0, "end-of-tape", BLK_END_OF_TAPE);   /* just in case */
182/* write 1MB of crap */
183    for (i = 0; i < 256 * 1024; i++) {
184        blk[i] = (int) (random() & 0xFF);
185    }
186    for (i = 0; i < 4 * 8; i++) {
187        (void) fwrite(blk, 1, 256 * 1024, g_tape_stream);
188        if (should_we_write_to_next_tape
189            (bkpinfo->media_size[g_current_media_number], (off_t)256 * 1024)) {
190            start_to_write_to_next_tape();
191        }
192    }
193/* write 1MB of zeroes */
194/*
195    for (i = 0; i < 256*1024; i++)
196      {
197        blk[i] = 0;
198      }
199    for (i = 0; i < 4; i++)
200      {
201        fwrite (blk, 1, 256*1024, g_tape_stream);
202        if (should_we_write_to_next_tape (bkpinfo->media_size[g_current_media_number], 256*1024))
203          {
204            start_to_write_to_next_tape ();
205          }
206      }
207*/
208    sleep(2);
209    paranoid_pclose(g_tape_stream);
210    log_it("closeout_tape() -- leaving");
211    for (i = 0; i < g_tapecatalog->entries; i++) {
212        log_it("i=%d type=%s num=%d aux=%ld posK=%lld", i,
213               (g_tapecatalog->el[i].type ==
214                fileset) ? "fileset" : "bigslice",
215               g_tapecatalog->el[i].number, g_tapecatalog->el[i].aux,
216               g_tapecatalog->el[i].tape_posK);
217    }
218    paranoid_free(blk);
219    paranoid_free(g_tapecatalog);
220    return (retval);
221}
222
223
224
225bool mt_says_tape_exists(char *dev)
226{
227    char *command = NULL;
228    int res;
229
230    mr_asprintf(command, "mt -f %s status", dev);
231    res = run_program_and_log_output(command, 1);
232    mr_free(command);
233
234    if (res) {
235        return (FALSE);
236    } else {
237        return (TRUE);
238    }
239}
240
241
242
243/**
244 * Determine the name of the tape device. Tries the SCSI tape for
245 * this platform, then the IDE tape, then "/dev/st0", then "/dev/osst0".
246 * @return the allocated tape string if success, NULL if failure
247 */
248char *mr_find_tape_device(void) {
249
250    char *tmp = NULL;
251    char *command = NULL;
252    char *cdr_exe = NULL;
253    char *dev = NULL;
254    int res;
255
256    log_to_screen("I am looking for your tape streamer. Please wait.");
257
258    tmp = find_home_of_exe("cdrecord");
259    if (tmp) {
260        mr_asprintf(cdr_exe, "cdrecord");
261    } else {
262        mr_asprintf(cdr_exe, "dvdrecord");
263    }
264    mr_free(tmp);
265
266    mr_asprintf(command, "%s -scanbus 2> /dev/null | grep -i tape | wc -l", cdr_exe);
267    tmp = call_program_and_get_last_line_of_output(command);
268    mr_free(command);
269
270    if (atoi(tmp) != 1) {
271        log_it("Either too few or too many tape streamers for me to detect...");
272        mr_asprintf(dev, "%s", VANILLA_SCSI_TAPE);
273        mr_free(tmp);
274        return(dev);
275    }
276    mr_free(tmp);
277
278    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);
279    tmp = call_program_and_get_last_line_of_output(command);
280    mr_free(command);
281
282    if (strlen(tmp) < 2) {
283        log_it("Could not find tape device");
284        mr_free(tmp);
285        return(NULL);
286    }
287    mr_free(tmp);
288
289    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);
290    mr_free(cdr_exe);
291    tmp = call_program_and_get_last_line_of_output(command);
292    mr_free(command);
293
294    mr_asprintf(dev, "%s", "/dev/st");
295    mr_strcat(dev, tmp);            // e.g. '/dev/st0' becomes '/dev/stN'
296    mr_free(tmp);
297
298    res = 0;
299    if (!mt_says_tape_exists(dev)) {
300        mr_free(dev);
301        mr_asprintf(dev, "%s", ALT_TAPE);
302        if (!mt_says_tape_exists(dev)) {
303            log_it("Cannot openin %s", dev);
304            mr_free(dev);
305            mr_asprintf(dev, "/dev/st0");
306            if (!mt_says_tape_exists(dev)) {
307                log_it("Cannot openin %s", dev);
308                mr_free(dev);
309                mr_asprintf(dev, "/dev/osst0");
310                if (!mt_says_tape_exists(dev)) {
311                    mr_free(dev);
312                    res++;
313                } else {
314                    res = 0;
315                }
316            }
317        }
318    }
319
320    if (dev) {
321        log_it("At this point, dev = %s and res = %d", dev, res);
322    } else {
323        log_it("At this point, dev is NULL and res = %d", dev, res);
324    }
325
326    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, "%s", (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            mr_free(dev);
341            res++;
342        }
343    }
344
345    if (dev) {
346        log_it("At this new point, dev = %s and res = %d", dev, res);
347    } else {
348        log_it("At this new point, dev is NULL and res = %d", res);
349    }
350
351    if (strlen(tmp) < 2) {
352        log_it("Warning - size of tape unknown");
353    }
354    mr_free(tmp);
355    return(dev);
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
530    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
531    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
532        type = fileset;
533    } else if (strstr(latest_fname, "slice")) {
534        type = biggieslice;
535    } else {
536        log_it("fname = %s", latest_fname);
537        fatal_error("Unknown type. Internal error in maintain_collection_of_recent_archives()");
538    }
539    mr_asprintf(tmpdir, "%s/tmpfs/backcatalog", bkpinfo->tmpdir);
540    mkdir(tmpdir, 0x700);
541    mr_asprintf(command, "cp -f %s %s", latest_fname, tmpdir);
542    if (run_program_and_log_output(command, 6)) {
543        log_it("Warning - failed to copy %s to backcatalog at %s",
544               latest_fname, tmpdir);
545    }
546    mr_free(command);
547
548    last = g_tapecatalog->entries - 1;
549    if (last <= 0) {
550        log_it("Too early to start deleting from collection.");
551        mr_free(tmpdir);
552        return (0);
553    }
554    final_alleged_writeK = g_tapecatalog->el[last].tape_posK;
555    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
556    for (curr = last; curr >= 0; curr--) {
557        cposK = g_tapecatalog->el[curr].tape_posK;
558        if (cposK < final_projected_certain_writeK) {
559            final_actually_certain_writeK = cposK;
560            break;
561        }
562    }
563    if (curr < 0) {
564        log_it("Not far enough into tape to start deleting old archives from collection.");
565        mr_free(tmpdir);
566        return (0);
567    }
568
569    for (i = curr - 1; i >= 0 && curr - i < 10; i--) {
570        mr_asprintf(old_fname, "%s/%s", tmpdir, g_tapecatalog->el[i].fname);
571        unlink(old_fname);
572        mr_free(old_fname);
573    }
574    mr_free(tmpdir);
575    return (0);
576}
577
578
579
580
581/**
582 * Open the CD stream for input.
583 * @param bkpinfo The backup information structure. Passed to openin_tape().
584 * @return 0 for success, nonzero for failure.
585 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
586 */
587int openin_cdstream()
588{
589    return (openin_tape());
590}
591
592/**
593 * FIFO used to read/write to the tape device.
594 * @bug This seems obsolete now that we call an external @c buffer program. Please look onto this.
595 */
596char g_tape_fifo[MAX_STR_LEN];
597
598
599
600int set_tape_block_size_with_mt(long internal_tape_block_size)
601{
602    char *tmp = NULL;
603    int res;
604
605    if (bkpinfo->media_device == NULL) {
606        return(1);
607    }
608
609    if (strncmp(bkpinfo->media_device, "/dev/", 5)) {
610        log_msg(1, "Not using 'mt setblk'. This isn't an actual /dev entry.");
611        return (0);
612    }
613    mr_asprintf(tmp, "mt -f %s setblk %ld", bkpinfo->media_device, internal_tape_block_size);
614    res = run_program_and_log_output(tmp, 3);
615    mr_free(tmp);
616    return (res);
617}
618
619/**
620 * Return the non-rewinding device when passed the normal one
621 * @param tapedev The tape device to open for writing.
622 * @note the caller needs to free the string returned
623 */
624char *get_non_rewind_dev(char *tapedev)
625{
626
627    char *ntapedev = NULL;
628    char *p = NULL;
629    char *q = NULL;
630    char *r = NULL;
631
632    ntapedev = (char *)malloc(strlen(tapedev)+sizeof(char));
633    p = strrchr(tapedev,'/');
634    if (p == NULL) {
635        log_it("Didn't find a '/' in %s",tapedev);
636        return(NULL);
637    }
638
639    /* Copy tapedev content up to the last / */
640    q = tapedev;
641    r = ntapedev;
642    while (q != p) {
643        *r = *q;
644        r++;
645        q++;
646    }
647    /* Copy the '/' */
648    *r = *q;
649    r++;
650    q++;
651    /* Adds a 'n' - non-rewinding */
652    *r = 'n';
653    r++;
654    /* Copy the rest of tapedev */
655    while (*q != '\0') {
656        *r = *q;
657        r++;
658        q++;
659    }
660    *r = '\0';
661    if (mt_says_tape_exists(ntapedev)) {
662        log_it("Non-rewinding tape device is %s",ntapedev);
663    } else {
664        log_it("Unable to find non-rewinding tape device.");
665        ntapedev = NULL;
666    }
667    return(ntapedev);
668}
669
670
671
672/**
673 * Handle OBDR if we were asked to do so
674 * @param tapedev The tape device to open for reading.
675 */
676int skip_obdr(void)
677{
678    char *command = NULL;
679    int res = 0;
680
681    if (bkpinfo->media_device == NULL) {
682        return(1);
683    }
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    if (bkpinfo->media_device == NULL) {
712        return(1);
713    }
714
715    log_it("Creating OBDR headers");
716    /* OBDR: First block 10 kB of zero bs = 512 */
717    mr_asprintf(command, "mt -f %s compression off",bkpinfo->media_device);
718    res = run_program_and_log_output(command, 1);
719    paranoid_free(command);
720
721    mr_asprintf(command, "mt -f %s rewind",bkpinfo->media_device);
722    res += run_program_and_log_output(command, 1);
723    paranoid_free(command);
724
725    set_tape_block_size_with_mt(512);
726
727    mr_asprintf(command, "dd if=/dev/zero of=%s bs=512 count=20",bkpinfo->media_device);
728    res += run_program_and_log_output(command, 1);
729    paranoid_free(command);
730
731    /* OBDR: then ISO boot image bs = 2048 */
732    set_tape_block_size_with_mt(2048);
733
734    mr_asprintf(command, "dd if=%s of=%s bs=2048",MINDI_CACHE"/mondorescue.iso",bkpinfo->media_device);
735    res += run_program_and_log_output(command, 1);
736    paranoid_free(command);
737
738    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
739    return(res);
740}
741
742
743/**
744 * Open the tape device for input.
745 * @param bkpinfo The backup information structure. Fields used:
746 * - @c bkpinfo->media_device
747 * - @c bkpinfo->tmpdir
748 * @return 0 for success, nonzero for failure.
749 * @note This will also work with a cdstream for now, but don't count on this behavior.
750 */
751int openin_tape()
752{
753    /*@ buffer ***************************************************** */
754    char fname[MAX_STR_LEN];
755    char *datablock;
756    char *tmp = NULL;
757    char old_cwd[MAX_STR_LEN];
758    char *outfname = NULL;
759    /*@ int ******************************************************* */
760    int i;
761    int j;
762    int res = 0;
763    long length, templong;
764    size_t k;
765    int retval = 0;
766    int ctrl_chr;
767
768    /*@ long long ************************************************* */
769    long long size;
770
771    /*@ pointers ************************************************** */
772    FILE *fout;
773
774    /*@ end vars *************************************************** */
775
776    g_tapecatalog = mr_malloc(sizeof(struct s_tapecatalog));
777    g_tapecatalog->entries = 0;
778    g_tape_posK = 0;
779    if (g_tape_stream) {
780        log_it("FYI - I won't 'openin' the tape. It's already open.");
781        return (0);
782    }
783
784    // mondoarchive should have configured everything to give the right non-rew device
785    if ((bkpinfo->use_obdr) && (bkpinfo->media_device != NULL)) {
786        res = skip_obdr();
787        if (res != 0) {
788            log_it("Not able to skip OBDR - Restore will have to be done manually");
789        }
790    } else {
791        if (bkpinfo->media_device == NULL) {
792            log_it("Not able to skip OBDR - Restore will have to be done manually");
793            return (1);
794        }
795        set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
796    }
797
798    insist_on_this_tape_number(1);
799    mr_asprintf(outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
800    make_hole_for_file(outfname);
801
802    log_it("Opening IN tape");
803    if (!(g_tape_stream = open_device_via_buffer(bkpinfo->media_device, 'r', bkpinfo->internal_tape_block_size))) {
804        log_OS_error(g_tape_fifo);
805        log_to_screen("Cannot openin stream device");
806        mr_free(outfname);
807        return (1);
808    }
809    log_to_screen("Reading stream");
810    log_it("stream device = '%s'", bkpinfo->media_device);
811/* skip data disks */
812    open_evalcall_form("Skipping data disks on stream");
813    log_to_screen("Skipping data disks on stream");
814    if (!(fout = fopen(outfname, "w"))) {
815        log_OS_error(outfname);
816        log_to_screen("Cannot openout datadisk all.tar.gz file");
817        mr_free(outfname);
818        return (-1);
819    }
820    if (!(datablock = (char *) malloc(256 * 1024))) {
821        log_to_screen("Unable to malloc 256*1024");
822        mr_free(outfname);
823        finish(1);
824    }
825    for (i = 0; i < 32; i++) {
826        for (j = 0; j < 4; j++) {
827            for (length = 0, k = 0; length < 256 * 1024; length += k) {
828                k = fread(datablock + length, 1, 256 * 1024 - length,
829                          g_tape_stream);
830            }
831            (void) fwrite(datablock, 1, (size_t) length, fout);
832            g_tape_posK += length / 1024;
833        }
834        if (i > 8)              // otherwise, 'buffer' distorts calculations
835        {
836            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
837            update_evalcall_form((int) (templong));
838        }
839    }
840    paranoid_fclose(fout);
841    paranoid_free(datablock);
842
843/* find initial blocks */
844    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
845    retval += res;
846    if (ctrl_chr != BLK_START_OF_TAPE) {
847        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
848    }
849    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
850    retval += res;
851    if (ctrl_chr != BLK_START_OF_BACKUP) {
852        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
853    }
854    close_evalcall_form();
855    log_it("Saved all.tar.gz to '%s'", outfname);
856    (void) getcwd(old_cwd, MAX_STR_LEN);
857    chdir(bkpinfo->tmpdir);
858    mr_asprintf(tmp, "tar -zxf %s ./tmp/mondo-restore.cfg 2> /dev/null", outfname);
859    paranoid_system(tmp);
860    mr_free(tmp);
861
862    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
863    chdir(old_cwd);
864    unlink(outfname);
865    mr_free(outfname);
866    return (retval);
867}
868
869
870/**
871 * Start writing to a CD stream.
872 * @param cddev The CD device to openout via cdrecord.
873 * @param speed The speed to write at.
874 * @return 0 for success, nonzero for failure.
875 * @note This should be called only from backup processes.
876 */
877int openout_cdstream(char *cddev, int speed)
878{
879    /*@ buffers ***************************************************** */
880    char *command = NULL;
881
882    /*@ end vars *************************************************** */
883
884    if (cddev == NULL) {
885        log_to_screen("Failed to openout NULL cddev");
886        return (1);
887    }
888    /*  add 'dummy' if testing */
889    mr_asprintf(command, "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s", cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
890    /*  initialise the catalog */
891    g_current_media_number = 1;
892    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
893        fatal_error("Cannot alloc mem for tape catalog");
894    }
895    g_tapecatalog->entries = 0;
896    /* log stuff */
897    log_it("Opening OUT cdstream with the command");
898    log_it(command);
899    /*  log_it("Let's see what happens, shall we?"); */
900    g_tape_stream = popen(command, "w");
901    mr_free(command);
902
903    if (g_tape_stream) {
904        return (0);
905    } else {
906        log_to_screen("Failed to openout to cdstream (fifo)");
907        return (1);
908    }
909}
910
911
912/**
913 * Start writing to a tape device for the backup.
914 * Handle OBDR if we were asked to do so
915 * @param tapedev The tape device to open for writing.
916 * @return 0 for success, nonzero for failure.
917 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
918 * EXISTING DATA on the tape!
919 */
920int openout_tape() {
921
922g_current_media_number = 1;
923if (g_tape_stream) {
924    log_it("FYI - I won't 'openout' the tape. It's already open.");
925    return (0);
926}
927if (bkpinfo->media_device == NULL) {
928    log_it("Unable to openout NULL dvice");
929    return(1);
930}
931g_tapecatalog = mr_malloc(sizeof(struct s_tapecatalog));
932g_tapecatalog->entries = 0;
933g_tape_posK = 0;
934
935if (bkpinfo->use_obdr) {
936    create_obdr();
937} else {
938    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
939}
940log_it("Opening OUT tape");
941if (!(g_tape_stream = open_device_via_buffer(bkpinfo->media_device, 'w', bkpinfo->internal_tape_block_size))) {
942    log_OS_error(g_tape_fifo);
943    log_to_screen("Cannot openin stream device");
944    return (1);
945}
946return (0);
947}
948
949
950
951
952/**
953 * Copy a file from the opened stream (CD or tape) to @p outfile.
954 * @param outfile The file to write to.
955 * @param size The size of the file in the input stream.
956 * @return 0 for success, nonzero for failure.
957 */
958int
959read_file_from_stream_to_file(char *outfile, long long size)
960{
961
962    /*@ int ******************************************************** */
963    int res;
964
965    /*@ end vars *************************************************** */
966
967    res = read_file_from_stream_FULL(outfile, NULL, size);
968
969    return (res);
970}
971
972
973
974/**
975 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
976 * by @p fout.
977 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
978 * @param fout The stream to write the file to.
979 * @param size The size of the file in bytes.
980 * @return 0 for success, nonzero for failure.
981 */
982int
983read_file_from_stream_to_stream(FILE * fout, long long size)
984{
985
986    /*@ int ******************************************************** */
987    int res;
988
989    /*@ end vars *************************************************** */
990
991    res = read_file_from_stream_FULL(NULL, fout, size);
992/*  fflush(g_tape_stream);
993  fflush(fout);*/
994    return (res);
995}
996
997
998
999/**
1000 * Copy a file from the currently opened stream (CD or tape) to either a
1001 * @c FILE pointer indicating a currently-opened file, or a filename indicating
1002 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
1003 * and read_file_from_stream_to_stream() are wrappers for.
1004 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1005 * @param outfname If non-NULL, write to this file.
1006 * @param foutstream If non-NULL, write to this stream.
1007 * @param orig_size The original length of the file in bytes.
1008 * @return 0 for success, nonzero for failure.
1009 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
1010 */
1011int
1012read_file_from_stream_FULL(char *outfname, FILE * foutstream, long long orig_size)
1013{
1014    /*@ buffers ***************************************************** */
1015    char *datablock;
1016    char *temp_fname;
1017    char *temp_cksum;
1018    char *actual_cksum = NULL;
1019
1020    /*@ int ********************************************************* */
1021    int retval = 0;
1022#ifdef EXTRA_TAPE_CHECKSUMS
1023    int i, ch;
1024#endif
1025    int noof_blocks;
1026    int ctrl_chr;
1027    int res;
1028    /*@ pointers **************************************************** */
1029    FILE *fout;
1030
1031    /*@ long    ***************************************************** */
1032    long bytes_to_write = 0L /*,i */ ;
1033//  long bytes_successfully_read_in_this_time = 0;
1034
1035    /*@ long long *************************************************** */
1036    long long temp_size, size;
1037    long bytes_read, bytes_to_read;
1038    long long total_read_from_tape_for_this_file = 0;
1039    long long where_I_was_before_tape_change = 0;
1040    /*@ unsigned int ************************************************ */
1041    /*  unsigned int ch; */
1042    unsigned int crc16;
1043    unsigned int crctt;
1044
1045    bool had_to_resync = FALSE;
1046
1047    /*@ init  ******************************************************* */
1048    malloc_string(temp_fname);
1049    malloc_string(temp_cksum);
1050    datablock = malloc(TAPE_BLOCK_SIZE);
1051    crc16 = 0;
1052    crctt = 0;
1053    size = orig_size;
1054
1055    /*@ end vars *************************************************** */
1056
1057    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1058    if (orig_size != temp_size && orig_size != -1) {
1059        log_to_screen("output file's size should be %ld K but is apparently %ld K", (long) size >> 10, (long) temp_size >> 10);
1060    }
1061    if (ctrl_chr != BLK_START_FILE) {
1062        wrong_marker(BLK_START_FILE, ctrl_chr);
1063        return (1);
1064    }
1065
1066    if (foutstream) {
1067        fout = foutstream;
1068    } else {
1069        fout = fopen(outfname, "w");
1070    }
1071    if (!fout) {
1072        log_OS_error(outfname);
1073        log_to_screen("Cannot openout file");
1074        return (1);
1075    }
1076    total_read_from_tape_for_this_file = 0;
1077    for (noof_blocks = 0; size > 0;
1078         noof_blocks++, size -=
1079         bytes_to_write, total_read_from_tape_for_this_file +=
1080         bytes_read) {
1081        bytes_to_write =
1082            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1083        bytes_to_read = TAPE_BLOCK_SIZE;
1084        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1085        while (bytes_read < bytes_to_read) {    // next tape!
1086//    crctt=crc16=0;
1087            where_I_was_before_tape_change = size;
1088            log_msg(4, "where_I_was_... = %lld",
1089                    where_I_was_before_tape_change);
1090            start_to_read_from_next_tape();
1091            log_msg(4, "Started reading from next tape.");
1092            skip_incoming_files_until_we_find_this_one(temp_fname);
1093            log_msg(4, "Skipped irrelevant files OK.");
1094            for (size = orig_size; size > where_I_was_before_tape_change;
1095                 size -= bytes_to_write) {
1096                bytes_read =
1097                    fread(datablock, 1, bytes_to_read, g_tape_stream);
1098            }
1099            log_msg(4, "'size' is now %lld (should be %lld)", size,
1100                    where_I_was_before_tape_change);
1101            log_to_screen("Successfully re-sync'd tape");
1102            had_to_resync = TRUE;
1103            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1104        }
1105
1106        (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
1107
1108#ifdef EXTRA_TAPE_CHECKSUMS
1109        for (i = 0; i < (int) bytes_to_write; i++) {
1110            ch = datablock[i];
1111            crc16 = updcrcr(crc16, (unsigned) ch);
1112            crctt = updcrc(crctt, (unsigned) ch);
1113        }
1114#endif
1115    }
1116    log_msg(6, "Total read from tape for this file = %lld",
1117            total_read_from_tape_for_this_file);
1118    log_msg(6, ".......................... Should be %lld", orig_size);
1119    g_tape_posK += total_read_from_tape_for_this_file / 1024;
1120    mr_asprintf(actual_cksum, "%04x%04x", crc16, crctt);
1121    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
1122    } else {
1123        paranoid_fclose(fout);
1124    }
1125    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
1126    if (ctrl_chr != BLK_STOP_FILE) {
1127        wrong_marker(BLK_STOP_FILE, ctrl_chr);
1128    }
1129    if (strcmp(temp_cksum, actual_cksum)) {
1130        log_to_screen("actual cksum=%s; recorded cksum=%s", actual_cksum, temp_cksum);
1131        log_to_screen("%s (%ld K) is corrupt on tape", temp_fname, (long) orig_size >> 10);
1132        retval++;
1133    }
1134    mr_free(actual_cksum);
1135
1136    paranoid_free(datablock);
1137    paranoid_free(temp_fname);
1138    paranoid_free(temp_cksum);
1139    return (retval);
1140}
1141
1142
1143
1144/**
1145 * Read a header block from the currently opened stream (CD or tape).
1146 * This block indicates the length of the following file (if it's file-related)
1147 * the filename (if it's file-related), and the block type.
1148 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
1149 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
1150 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
1151 * @return 0 for success, nonzero for failure.
1152 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
1153 */
1154int
1155read_header_block_from_stream(long long *plen, char *filename,
1156                              int *pcontrol_char)
1157{
1158
1159    /*@ buffers ***************************************************** */
1160    char *tempblock;
1161
1162    /*@ int ********************************************************* */
1163    int i, retval;
1164
1165    /*@ end vars *************************************************** */
1166
1167    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
1168
1169    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1170        tempblock[i] = 0;
1171    }
1172    while (!(*pcontrol_char = tempblock[7000])) {
1173        g_tape_posK +=
1174            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1175                  g_tape_stream) / 1024;
1176    }
1177    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1178    if (strcmp(tempblock + 6000 + *pcontrol_char, STR_HEADER)) {
1179        log_it("Bad header block at %ld K", (long) g_tape_posK);
1180    }
1181    strcpy(filename, tempblock + 1000);
1182    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1183        log_to_screen("I can't verify an aborted backup.");
1184        retval = 1;
1185    } else {
1186        retval = 0;
1187    }
1188    for (i = 1000; i < 1020; i++) {
1189        if (tempblock[i] < 32 || tempblock[i] > 126) {
1190            tempblock[i] = ' ';
1191        }
1192    }
1193    tempblock[i] = '\0';
1194    log_msg(6, "%s (fname=%s, size=%ld K)",
1195            marker_to_string(*pcontrol_char), tempblock + 1000,
1196            (long) (*plen) >> 10);
1197    paranoid_free(tempblock);
1198    return (retval);
1199}
1200
1201
1202
1203/**
1204 * Add specified file/slice to the internal catalog of all archives written.
1205 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1206 * write the last [buffer size] MB from the catalog to the new tape, so we know
1207 * we have @e all archives on some CD/tape/whatever.
1208 * @param type The type of file we're cataloging (afioball, slice, something else)
1209 * @param number The fileset number or biggiefile number.
1210 * @param aux The slice number if it's a biggiefile, or any other additional info.
1211 * @param fn The original full pathname of the file we're recording.
1212 * @return The index of the record we just added.
1213 */
1214int register_in_tape_catalog(t_archtype type, int number, long aux,
1215                             char *fn)
1216{
1217    int last;
1218    char fname[MAX_TAPECAT_FNAME_LEN+1];
1219    char *p;
1220
1221    p = strrchr(fn, '/');
1222    if (p) {
1223        p++;
1224    } else {
1225        p = fn;
1226    }
1227    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1228    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1229    last = g_tapecatalog->entries;
1230    if (last >= MAX_TAPECATALOG_ENTRIES) {
1231        log_it
1232            ("Warning - can't log #%d in tape catalog - too many entries already",
1233             number);
1234        return (-1);
1235    }
1236    g_tapecatalog->el[last].type = type;
1237    g_tapecatalog->el[last].number = number;
1238    g_tapecatalog->el[last].aux = aux;
1239    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1240    strcpy(g_tapecatalog->el[last].fname, fname);
1241    g_tapecatalog->entries++;
1242    return (last);              // returns the index of the record we've jsut added
1243}
1244
1245
1246
1247
1248/**
1249 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1250 * (got SIGPIPE) or look like we will.
1251 * @param mediasize The size of the tape in megabytes.
1252 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1253 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1254 * autodetecting the size. Huh?
1255 */
1256
1257/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1258bool
1259should_we_write_to_next_tape(long mediasize,
1260                             off_t length_of_incoming_file)
1261{
1262    /*@ bool's ***************************************************** */
1263    bool we_need_a_new_tape = FALSE;
1264
1265    /*@ end vars *************************************************** */
1266
1267    if (mediasize == 0) {
1268        return (FALSE);
1269    }
1270    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1271        log_it("mediasize = %ld", mediasize);
1272        we_need_a_new_tape = TRUE;
1273        log_to_screen("Should have started a new tape/CD already");
1274    }
1275    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1276        mediasize - (SLICE_SIZE * 4 / 1024)) {
1277        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1278               mediasize);
1279        we_need_a_new_tape = TRUE;
1280    }
1281    return (we_need_a_new_tape);
1282}
1283
1284
1285/**
1286 * Seek through the stream until we find a header block where the NAME field matches
1287 * @p the_file_I_was_reading. This is useful if you've just started reading from
1288 * a new tape and want to find the file you were reading when the tape ended.
1289 * @param the_file_I_was_reading File name to look for.
1290 * @return 0 for success, nonzero for failure.
1291 */
1292int skip_incoming_files_until_we_find_this_one(char
1293                                               *the_file_I_was_reading)
1294{
1295    char *pA;
1296    char *pB;
1297    int res;
1298    int ctrl_chr;
1299    char *temp_fname;
1300    char *datablock;
1301    long long temp_size, size;
1302    long bytes_to_write;
1303
1304    datablock = malloc(TAPE_BLOCK_SIZE);
1305    malloc_string(temp_fname);
1306    pB = strrchr(the_file_I_was_reading, '/');
1307    if (pB) {
1308        pB++;
1309    } else {
1310        pB = the_file_I_was_reading;
1311    }
1312    log_msg(1, "skip_incoming_..(%s)", pB);
1313    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1314    ctrl_chr = -1;
1315    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1316        res =
1317            read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1318        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1319            break;
1320        }
1321        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1322        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1323        log_msg(3, "Still trying to re-sync w/ tape");
1324    }
1325    while (ctrl_chr != BLK_START_FILE) {
1326        res =
1327            read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1328        if (ctrl_chr == BLK_START_FILE) {
1329            break;
1330        }
1331        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1332        wrong_marker(BLK_START_FILE, ctrl_chr);
1333        log_msg(3, "Still trying to re-sync w/ tape");
1334    }
1335    pA = strrchr(temp_fname, '/');
1336    if (pA) {
1337        pA++;
1338    } else {
1339        pA = temp_fname;
1340    }
1341    pB = strrchr(the_file_I_was_reading, '/');
1342    if (pB) {
1343        pB++;
1344    } else {
1345        pB = the_file_I_was_reading;
1346    }
1347    while (strcmp(pA, pB)) {
1348        log_msg(6, "Skipping %s (it's not %s)", temp_fname, the_file_I_was_reading);
1349        for (size = temp_size; size > 0; size -= bytes_to_write) {
1350            bytes_to_write =
1351                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1352            // FIXME - needs error-checking and -catching
1353            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1354        }
1355        res =
1356            read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1357        if (ctrl_chr != BLK_STOP_FILE) {
1358            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1359        }
1360        res =
1361            read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1362        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1363            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1364        }
1365        res =
1366            read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1367        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1368            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1369        }
1370        res =
1371            read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1372        if (ctrl_chr != BLK_START_FILE) {
1373            wrong_marker(BLK_START_FILE, ctrl_chr);
1374        }
1375        pA = strrchr(temp_fname, '/');
1376        if (pA) {
1377            pA++;
1378        } else {
1379            pA = temp_fname;
1380        }
1381        pB = strrchr(the_file_I_was_reading, '/');
1382        if (pB) {
1383            pB++;
1384        } else {
1385            pB = the_file_I_was_reading;
1386        }
1387    }
1388    log_msg(2, "Reading %s (it matches %s)", temp_fname, the_file_I_was_reading);
1389    paranoid_free(temp_fname);
1390    paranoid_free(datablock);
1391    return (0);
1392}
1393
1394
1395/**
1396 * Start to read from the next tape. Assumes the user has already inserted it.
1397 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1398 * @return 0 for success, nonzero for failure.
1399 */
1400int start_to_read_from_next_tape()
1401{
1402    /*@ int ********************************************************* */
1403    int res = 0;
1404    char *sz_msg;
1405    int ctrlchr;
1406    long long temp_size;
1407    malloc_string(sz_msg);
1408    /*@ end vars *************************************************** */
1409
1410    if (bkpinfo->media_device == NULL) {
1411        log_it("Unable to open in from NULL device");
1412        return (1);
1413    }
1414
1415    paranoid_pclose(g_tape_stream);
1416    sync();
1417    sync();
1418    sync();
1419    log_it("Next tape requested.");
1420    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1421    log_it("Opening IN the next tape");
1422    if (!(g_tape_stream = open_device_via_buffer(bkpinfo->media_device, 'r', bkpinfo->internal_tape_block_size))) {
1423        log_OS_error(g_tape_fifo);
1424        log_to_screen("Cannot openin stream device");
1425        return (1);
1426    }
1427    g_tape_posK = 0;
1428    g_sigpipe = FALSE;
1429    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1430    if (ctrlchr != BLK_START_OF_TAPE) {
1431        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1432    }
1433    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1434    if (ctrlchr != BLK_START_OF_BACKUP) {
1435        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1436    } else {
1437        log_msg(3, "Next tape opened OK. Whoopee!");
1438    }
1439    paranoid_free(sz_msg);
1440    return (res);
1441}
1442
1443
1444
1445/**
1446 * Start to write to the next tape. Assume the user has already inserted it.
1447 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1448 * @return 0 for success, nonzero for failure.
1449 */
1450int start_to_write_to_next_tape()
1451{
1452    int res = 0;
1453    char *command = NULL;
1454
1455    if (bkpinfo->media_device == NULL) {
1456        log_it("Unable to open out from NULL device");
1457        return (1);
1458    }
1459
1460    paranoid_pclose(g_tape_stream);
1461    sync();
1462    sync();
1463    sync();
1464    log_it("New tape requested.");
1465    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1466    if (g_current_media_number > MAX_NOOF_MEDIA) {
1467        res++;
1468        log_to_screen("Too many tapes. Man, you need to use nfs!");
1469    }
1470    if (bkpinfo->backup_media_type == cdstream) {
1471        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);
1472        log_it("Opening OUT to next CD with the command");
1473        log_it(command);
1474        log_it("Let's see what happens, shall we?");
1475        g_tape_stream = popen(command, "w");
1476        mr_free(command);
1477
1478        if (!g_tape_stream) {
1479            log_to_screen("Failed to openout to cdstream (fifo)");
1480            return (1);
1481        }
1482    } else {
1483        log_it("Opening OUT to next tape");
1484        if (!(g_tape_stream = open_device_via_buffer(bkpinfo->media_device, 'w', bkpinfo->internal_tape_block_size))) {
1485            log_OS_error(g_tape_fifo);
1486            log_to_screen("Cannot openin stream device");
1487            return (1);
1488        }
1489    }
1490    g_tape_posK = 0;
1491    g_sigpipe = FALSE;
1492    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1493    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1494    return (res);
1495}
1496
1497
1498
1499
1500/**
1501 * Write a bufferfull of the most recent archives to the tape. The
1502 * rationale behind this is a bit complex. If the previous tape ended
1503 * suddenly (EOF or otherwise) some archives were probably left in the
1504 * buffer. That means that Mondo thinks they have been written, but
1505 * the external binary @c buffer has not actually written them. So to
1506 * be safe, we start the new tape by writing the last bufferfull from
1507 * the old one. This insures that all archives will be on at least
1508 * one tape. Sounds inelegant, but it works.
1509 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1510 * @return 0 for success, nonzero for failure.
1511 */
1512int write_backcatalog_to_tape()
1513{
1514    int i, last, res = 0;
1515    char *fname = NULL;
1516
1517    log_msg(2, "I am now writing back catalog to tape");
1518    last = g_tapecatalog->entries - 1;
1519    for (i = 0; i <= last; i++) {
1520        mr_asprintf(fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir, g_tapecatalog->el[i].fname);
1521        if (!does_file_exist(fname)) {
1522            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1523        } else {
1524            write_header_block_to_stream(length_of_file(fname),
1525                                         "start-backcatalog-afio-or-slice",
1526                                         BLK_START_AN_AFIO_OR_SLICE);
1527            log_msg(2, "Writing %s", fname);
1528            if (write_file_to_stream_from_file(fname)) {
1529                res++;
1530                log_msg(2, "%s failed", fname);
1531            }
1532            if (i != last) {
1533                write_header_block_to_stream((off_t)0,
1534                                             "stop-backcatalog-afio-or-slice",
1535                                             BLK_STOP_AN_AFIO_OR_SLICE);
1536            }
1537        }
1538        mr_free(fname);
1539    }
1540    log_msg(2, "Finished writing back catalog to tape");
1541    return (res);
1542}
1543
1544
1545
1546/**
1547 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1548 * @param fname The path to all.tar.gz.
1549 * @return 0 for success, nonzero for failure.
1550 */
1551int write_data_disks_to_stream(char *fname)
1552{
1553    /*@ pointers *************************************************** */
1554    FILE *fin;
1555
1556    /*@ long ******************************************************* */
1557    long m = -1;
1558    long templong;
1559
1560    /*@ int ******************************************************** */
1561    int i, j;
1562
1563    /*@ buffers **************************************************** */
1564    char tempblock[256 * 1024];
1565
1566    /*@ end vars *************************************************** */
1567
1568    open_evalcall_form("Writing data disks to tape");
1569    log_to_screen("Writing data disks to tape");
1570    log_it("Data disks = %s", fname);
1571    if (!does_file_exist(fname)) {
1572        log_to_screen("Cannot find %s", fname);
1573        return (1);
1574    }
1575    if (!(fin = fopen(fname, "r"))) {
1576        log_OS_error(fname);
1577        fatal_error("Cannot openin the data disk");
1578    }
1579    for (i = 0; i < 32; i++) {  /* 32MB */
1580        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1581            if (!feof(fin)) {
1582                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1583            } else {
1584                m = 0;
1585            }
1586            for (; m < 256 * 1024; m++) {
1587                tempblock[m] = '\0';
1588            }
1589            g_tape_posK +=
1590                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1591        }
1592        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1593        {
1594            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1595            update_evalcall_form((int) (templong));
1596        }
1597    }
1598    paranoid_fclose(fin);
1599    close_evalcall_form();
1600    return (0);
1601}
1602
1603
1604
1605
1606/**
1607 * Copy @p infile to the opened stream (CD or tape).
1608 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1609 * @param infile The file to write to the stream.
1610 * @return 0 for success, nonzero for failure.
1611 */
1612int write_file_to_stream_from_file(char *infile)
1613{
1614    /*@ buffers **************************************************** */
1615    char datablock[TAPE_BLOCK_SIZE];
1616    char *checksum = NULL;
1617    char *infile_basename;
1618
1619    /*@ int ******************************************************** */
1620    int retval = 0;
1621    int noof_blocks;
1622
1623    /*  unsigned int ch; */
1624    unsigned int crc16;
1625    unsigned int crctt;
1626
1627    /*@ pointers *************************************************** */
1628    FILE *fin;
1629    char *p;
1630
1631    /*@ long ******************************************************* */
1632    long bytes_to_read = 0;
1633    long i;
1634
1635    off_t filesize;
1636
1637#ifdef EXTRA_TAPE_CHECKSUMS
1638    int ch;
1639#endif
1640
1641    /*@ initialize ************************************************ */
1642    crc16 = 0;
1643    crctt = 0;
1644
1645
1646
1647    /*@ end vars *************************************************** */
1648
1649    infile_basename = strrchr(infile, '/');
1650    if (infile_basename) {
1651        infile_basename++;
1652    } else {
1653        infile_basename = infile;
1654    }
1655    filesize = length_of_file(infile);
1656    if (should_we_write_to_next_tape
1657        (bkpinfo->media_size[g_current_media_number], filesize)) {
1658        start_to_write_to_next_tape();
1659        write_backcatalog_to_tape();
1660    }
1661    p = strrchr(infile, '/');
1662    if (!p) {
1663        p = infile;
1664    } else {
1665        p++;
1666    }
1667    log_it("Writing file '%s' to tape (%ld KB)", p, (long) filesize >> 10);
1668    write_header_block_to_stream(filesize, infile_basename,
1669                                 BLK_START_FILE);
1670//go_here_to_restart_saving_of_file:
1671    if (!(fin = fopen(infile, "r"))) {
1672        log_OS_error(infile);
1673        return (1);
1674    }
1675    for (noof_blocks = 0; filesize > 0;
1676         noof_blocks++, filesize -= bytes_to_read) {
1677        if (filesize < TAPE_BLOCK_SIZE) {
1678            bytes_to_read = (long) filesize;
1679            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1680                datablock[i] = '\0';
1681            }
1682        } else {
1683            bytes_to_read = TAPE_BLOCK_SIZE;
1684        }
1685        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1686        g_tape_posK +=
1687            fwrite(datablock, 1, /*bytes_to_read */ 
1688                   (size_t) TAPE_BLOCK_SIZE,
1689                   g_tape_stream) / 1024;
1690        if (g_sigpipe) {
1691            log_it("Sigpipe occurred recently. I'll start a new tape.");
1692            fclose(fin);
1693            g_sigpipe = FALSE;
1694            start_to_write_to_next_tape();
1695            write_backcatalog_to_tape();    // kinda-sorta recursive :)
1696            return (0);
1697        }
1698#ifdef EXTRA_TAPE_CHECKSUMS
1699        for (i = 0; i < bytes_to_read; i++) {
1700            ch = datablock[i];
1701            crc16 = updcrcr(crc16, (unsigned) ch);
1702            crctt = updcrc(crctt, (unsigned) ch);
1703        }
1704#endif
1705    }
1706    paranoid_fclose(fin);
1707    mr_asprintf(checksum, "%04x%04x", crc16, crctt);
1708    /* BERLIOS: what does it do ??? */
1709    write_header_block_to_stream((off_t)g_current_media_number, checksum, BLK_STOP_FILE);
1710    mr_free(checksum);
1711
1712//  log_it("File '%s' written to tape.", infile);
1713    return (retval);
1714}
1715
1716
1717
1718
1719
1720/**
1721 * Write a header block to the opened stream (CD or tape).
1722 * @param length_of_incoming_file The length to store in the header block.
1723 * Usually matters only if this is a file-related header, in which case it should
1724 * be the length of the file that will follow.
1725 * @param filename The filename to store in the header block. Usually matters
1726 * only if this is a file-related header, in which case this should be the name
1727 * if the file that will follow.
1728 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1729 * @return 0 for success, nonzero for failure.
1730 */
1731int
1732write_header_block_to_stream(off_t length_of_incoming_file,
1733                             char *filename, int control_char)
1734{
1735    /*@ buffers **************************************************** */
1736    char tempblock[TAPE_BLOCK_SIZE];
1737    char *p;
1738
1739    /*@ int ******************************************************** */
1740    int i;
1741
1742    off_t olen;
1743
1744    /*@ end vars *************************************************** */
1745
1746
1747    olen = length_of_incoming_file;
1748    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1749    if (!p) {
1750        p = filename;
1751    } else {
1752        p++;
1753    }
1754    if (!g_tape_stream) {
1755        log_to_screen("You're not backing up to tape. Why write a tape header?");
1756        return (1);
1757    }
1758    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1759        tempblock[i] = 0;
1760    }
1761    sprintf(tempblock + 6000 + control_char, STR_HEADER);
1762    tempblock[7000] = control_char;
1763    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1764    strcpy(tempblock + 1000, filename);
1765    g_tape_posK += fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream) / 1024;
1766    log_msg(6, "%s (fname=%s, size=%ld K)", marker_to_string(control_char), p, (long) length_of_incoming_file >> 10);
1767    return (0);
1768}
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779/**
1780 * Log (to screen) an erroneous marker, along with what it should have been.
1781 * @param should_be What we were expecting.
1782 * @param it_is What we got.
1783 */
1784void wrong_marker(int should_be, int it_is)
1785{
1786    log_to_screen("Wrong marker! (Should be %s, is actually %s)", marker_to_string(should_be), marker_to_string(it_is));
1787}
1788
1789/* @} - end of streamGroup */
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