source: branches/3.0/mondo/src/common/libmondo-stream.c @ 3060

Last change on this file since 3060 was 3060, checked in by bruno, 7 years ago

r5035@localhost: bruno | 2012-11-09 03:17:01 +0100

  • Fix a compilation error and most compilation warnings
  • Property svn:keywords set to Id
File size: 51.1 KB
Line 
1/* libmondo-stream.c
2   $Id: libmondo-stream.c 3060 2012-11-10 04:05:37Z 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 3060 2012-11-10 04:05:37Z 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    int j;
119
120    blk = (char *) malloc(256 * 1024);
121
122    log_it("closein_tape() -- entering");
123    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
124    retval += res;
125    if (ctrl_chr != BLK_END_OF_BACKUP) {
126        wrong_marker(BLK_END_OF_BACKUP, ctrl_chr);
127    }
128    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
129    retval += res;
130    if (ctrl_chr != BLK_END_OF_TAPE) {
131        wrong_marker(BLK_END_OF_TAPE, ctrl_chr);
132    }
133    for (i = 0; i < 8 && !feof(g_tape_stream); i++) {
134        j = fread(blk, 1, 256 * 1024, g_tape_stream);
135        if (j) {
136            // FIXME
137        }
138    }
139    sleep(1);
140    paranoid_system("sync");
141    sleep(1);
142    paranoid_pclose(g_tape_stream);
143    log_it("closein_tape() -- leaving");
144/*
145  for(i=0; i < g_tapecatalog->entries; i++)
146    {
147      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);
148    }
149*/
150    if (!bkpinfo->please_dont_eject) {
151        eject_device(bkpinfo->media_device);
152    }
153    paranoid_free(blk);
154    paranoid_free(g_tapecatalog);
155    return (retval);
156}
157
158
159
160/**
161 * Close the global output file descriptor which Mondo has been using to write
162 * to the tape device (via buffer or dd).
163 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
164 * @return 0 for success, nonzero for failure.
165 * @note This should be called by backup processes only.
166 */
167int closeout_tape()
168{
169    /*@ int's ******************************************************* */
170    int retval = 0;
171//  int res = 0;
172//  int ctrl_chr = '\0';
173
174    /*@ buffers ***************************************************** */
175//  char fname[MAX_STR_LEN];
176
177    /*@ long long's ************************************************* */
178//  long long size;
179    int i;
180    char *blk;
181
182    blk = (char *) malloc(256 * 1024);
183
184    sleep(1);
185    paranoid_system("sync");
186    sleep(1);
187    log_it("closeout_tape() -- entering");
188    retval +=
189        write_header_block_to_stream((off_t)0, "end-of-backup",
190                                     BLK_END_OF_BACKUP);
191    retval += write_header_block_to_stream((off_t)0, "end-of-tape", BLK_END_OF_TAPE);   /* just in case */
192/* write 1MB of crap */
193    for (i = 0; i < 256 * 1024; i++) {
194        blk[i] = (int) (random() & 0xFF);
195    }
196    for (i = 0; i < 4 * 8; i++) {
197        if (fwrite(blk, 1, 256 * 1024, g_tape_stream)) {
198            //FIXME
199        }
200        if (should_we_write_to_next_tape
201            (bkpinfo->media_size[g_current_media_number], (off_t)256 * 1024)) {
202            start_to_write_to_next_tape();
203        }
204    }
205/* write 1MB of zeroes */
206/*
207    for (i = 0; i < 256*1024; i++)
208      {
209        blk[i] = 0;
210      }
211    for (i = 0; i < 4; i++)
212      {
213        fwrite (blk, 1, 256*1024, g_tape_stream);
214        if (should_we_write_to_next_tape (bkpinfo->media_size[g_current_media_number], 256*1024))
215          {
216            start_to_write_to_next_tape ();
217          }
218      }
219*/
220    sleep(2);
221    paranoid_pclose(g_tape_stream);
222    log_it("closeout_tape() -- leaving");
223    for (i = 0; i < g_tapecatalog->entries; i++) {
224        log_it("i=%d type=%s num=%d aux=%ld posK=%lld", i,
225               (g_tapecatalog->el[i].type ==
226                fileset) ? "fileset" : "bigslice",
227               g_tapecatalog->el[i].number, g_tapecatalog->el[i].aux,
228               g_tapecatalog->el[i].tape_posK);
229    }
230    //  if (!bkpinfo->please_dont_eject)
231    //    { eject_device(bkpinfo->media_device); }
232    paranoid_free(blk);
233    paranoid_free(g_tapecatalog);
234    return (retval);
235}
236
237
238
239bool mt_says_tape_exists(char *dev)
240{
241    char *command = NULL;
242    int res;
243
244    mr_asprintf(&command, "mt -f %s status", dev);
245    res = run_program_and_log_output(command, 1);
246    mr_free(command);
247
248    if (res) {
249        return (FALSE);
250    } else {
251        return (TRUE);
252    }
253}
254
255
256
257/**
258 * Determine the name and size of the tape device. Tries the SCSI tape for
259 * this platform, then the IDE tape, then "/dev/st0", then "/dev/osst0".
260 * @param dev Where to put the found tape device.
261 * @param siz Where to put the tape size (a string like "4GB")
262 * @return 0 if success, nonzero if failure (in which @p dev and @p siz are undefined).
263 */
264int find_tape_device_and_size(char *dev, char *siz)
265{
266    char tmp[MAX_STR_LEN];
267    char *command = NULL;
268    char cdr_exe[MAX_STR_LEN];
269    int res;
270
271    log_to_screen("I am looking for your tape streamer. Please wait.");
272    dev[0] = siz[0] = '\0';
273    if (find_home_of_exe("cdrecord")) {
274        strcpy(cdr_exe, "cdrecord");
275    } else {
276        strcpy(cdr_exe, "dvdrecord");
277    }
278    mr_asprintf(&command, "%s -scanbus 2> /dev/null | grep -i tape | wc -l",
279            cdr_exe);
280    strcpy(tmp, call_program_and_get_last_line_of_output(command));
281    mr_free(command);
282
283    if (atoi(tmp) != 1) {
284        log_it
285            ("Either too few or too many tape streamers for me to detect...");
286        strcpy(dev, VANILLA_SCSI_TAPE);
287        return 1;
288    }
289    mr_asprintf(&command,
290            "%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",
291            cdr_exe);
292    strcpy(tmp, call_program_and_get_last_line_of_output(command));
293    mr_free(command);
294
295    if (strlen(tmp) < 2) {
296        log_it("Could not find tape device");
297        return 1;
298    }
299    mr_asprintf(&command,
300            "%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",
301            cdr_exe);
302    strcpy(tmp, call_program_and_get_last_line_of_output(command));
303    mr_free(command);
304
305    strcpy(dev, VANILLA_SCSI_TAPE);
306    dev[strlen(dev) - 1] = '\0';
307    strcat(dev, tmp);           // e.g. '/dev/st0' becomes '/dev/stN'
308    res = 0;
309    if (!mt_says_tape_exists(dev)) {
310        strcpy(dev, ALT_TAPE);
311        if (!mt_says_tape_exists(dev)) {
312            log_it("Cannot openin %s", dev);
313            strcpy(dev, "/dev/st0");
314            if (!mt_says_tape_exists(dev)) {
315                log_it("Cannot openin %s", dev);
316                strcpy(dev, "/dev/osst0");
317                if (!mt_says_tape_exists(dev)) {
318                    res++;
319                } else {
320                    res = 0;
321                }
322            }
323        }
324    }
325
326    log_it("At this point, dev = %s and res = %d", dev, res);
327
328    strcpy(tmp, call_program_and_get_last_line_of_output("\
329cdrecord -scanbus 2> /dev/null | tr -s '\t' ' ' | \
330grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | \
331awk '{for(i=1; i<NF; i++) { if (index($i, \"GB\")>0) { print $i;};};};'"));
332
333    if (mt_says_tape_exists(dev)) {
334        res = 0;
335    } else {
336        log_it("Turning %s", dev);
337        strcpy(tmp, (strrchr(dev, '/') != NULL) ? strrchr(dev, '/') : dev);
338        sprintf(dev, "/dev/os%s", tmp);
339        log_it("...into %s", dev);
340        if (mt_says_tape_exists(dev)) {
341            res = 0;
342        } else {
343            res++;
344        }
345    }
346
347    siz[0] = '\0';
348    log_it("res=%d; dev=%s", res, dev);
349
350    if (res) {
351        return (res);
352    }
353
354    if (strlen(tmp) < 2) {
355        siz[0] = '\0';
356        log_it("Warning - size of tape unknown");
357        return (0);
358    } else {
359        strcpy(siz, tmp);
360        return (0);
361    }
362}
363
364
365
366
367
368
369int read_EXAT_files_from_tape(long long *ptmp_size, char *tmp_fname,
370                              int *pctrl_chr, char *xattr_fname,
371                              char *acl_fname)
372{
373    int res = 0;
374    char *fname = (char *)&res;                 /* Should NOT be NULL */
375    char *tmp = NULL;
376
377    // xattr
378    if (g_getfattr) {
379        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
380        if (*pctrl_chr != BLK_START_EXAT_FILE) {
381            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
382        }
383        if (strstr(fname, "xattr") == NULL) {
384            mr_asprintf(&tmp,"Wrong order expected xattr, got %s, sunshine.", fname);
385            fatal_error(tmp);
386        }
387        read_file_from_stream_to_file(xattr_fname, *ptmp_size);
388        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
389        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
390            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
391        }
392        log_msg(1, "Got xattr");
393        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
394        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
395            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
396        }
397        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
398        if (*pctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
399            log_msg(1, "No acl attributes found, skipping to afio files");
400            return(0);
401        } else {
402            if (*pctrl_chr != BLK_START_EXTENDED_ATTRIBUTES) {
403                wrong_marker(BLK_START_EXTENDED_ATTRIBUTES, *pctrl_chr);
404            }
405        }
406    }
407    // acl
408    if (g_getfacl) {
409        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
410        if (*pctrl_chr != BLK_START_EXAT_FILE) {
411            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
412        }
413        if (strstr(fname, "acl") == NULL) {
414            mr_asprintf(&tmp,"Wrong order expected acl, got %s, sunshine.", fname);
415            fatal_error(tmp);
416        }
417        read_file_from_stream_to_file(acl_fname, *ptmp_size);
418        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
419        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
420            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
421        }
422        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
423        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
424            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
425        }
426        log_msg(1, "Got acl");
427    }
428    // tarball itself
429    res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
430    log_msg(1, "End of extended attributes, now looking for afioball");
431    return (0);
432}
433
434
435int write_EXAT_files_to_tape(char *xattr_fname,
436                             char *acl_fname)
437{
438    int res = 0;
439    if (g_getfattr) {
440    // xattr
441        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
442                             BLK_START_EXTENDED_ATTRIBUTES);
443        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
444                             BLK_START_EXAT_FILE);
445        write_file_to_stream_from_file(xattr_fname);
446        write_header_block_to_stream((off_t)-1, xattr_fname, BLK_STOP_EXAT_FILE);
447        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
448                             BLK_STOP_EXTENDED_ATTRIBUTES);
449    }
450    if (g_getfacl) {
451    // acl
452        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
453                             BLK_START_EXTENDED_ATTRIBUTES);
454        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
455                             BLK_START_EXAT_FILE);
456        write_file_to_stream_from_file(acl_fname);
457        write_header_block_to_stream((off_t)-1, acl_fname, BLK_STOP_EXAT_FILE);
458        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
459                             BLK_STOP_EXTENDED_ATTRIBUTES);
460    }
461    return (res);
462}
463
464
465
466
467/**
468 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
469 * @param tapeno The tape number to insist on.
470 * @bug There is currently no way to actually verify that the user has actually
471 * inserted the right tape.
472 */
473void insist_on_this_tape_number(int tapeno)
474{
475    int i;
476    char *tmp = NULL;
477
478    log_it("Insisting on tape #%d", tapeno);
479    if (g_current_media_number != tapeno) {
480        mr_asprintf(&tmp,
481                "When the tape drive goes quiet, please insert volume %d in this series.",
482                tapeno);
483        popup_and_OK(tmp);
484        mr_free(tmp);
485        open_evalcall_form("Waiting while the tape drive settles");
486    } else {
487        open_evalcall_form("Waiting while the tape drive rewinds");
488    }
489
490    for (i = 0; i <= 100; i += 2) {
491        usleep(100000);
492        update_evalcall_form(i);
493    }
494    close_evalcall_form();
495    log_it("I assume user has inserted it. They _say_ they have...");
496    g_current_media_number = tapeno;
497
498    //  log_it("g_current_media_number = %d", g_current_media_number);
499    log_it("OK, I've finished insisting. On with the revelry.");
500}
501
502
503
504
505/**
506 * Debugging aid - log the offset we're at on the tape (reading or writing).
507 */
508void log_tape_pos(void)
509{
510    /*@ buffers ***************************************************** */
511
512
513    /*@ end vars *************************************************** */
514
515    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
516           (long) g_tape_posK >> 10);
517}
518
519
520
521
522/**
523 * Add a file to a collection of recently archived filesets/slices.
524 * The type is determined by the filename: if it contains ".afio." it is
525 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
526 * otherwise we generate a fatal_error().
527 * @param td The current @c bkpinfo->tempdir (file will be placed in <tt>td</tt>/tmpfs/backcatalog/).
528 * @param latest_fname The file to place in the collection.
529 * @return 0, always.
530 * @bug Return value is redundant.
531 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
532 */
533int maintain_collection_of_recent_archives(char *td, char *latest_fname)
534{
535    long long final_alleged_writeK, final_projected_certain_writeK,
536        cposK, bufsize_K;
537    int last, curr, i;
538    char *command = NULL;
539    char *tmpdir = NULL;
540    char *old_fname = NULL;
541    char *p;
542    char suffix[16];
543
544    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
545    if ((p = strrchr(latest_fname, '.'))) {
546        strcpy(suffix, ++p);
547    } else {
548        suffix[0] = '\0';
549    }
550    mr_asprintf(&tmpdir, "%s/tmpfs/backcatalog", td);
551    mkdir(tmpdir, 0x700);
552    mr_asprintf(&command, "cp -f %s %s", latest_fname, tmpdir);
553    if (run_program_and_log_output(command, 6)) {
554        log_it("Warning - failed to copy %s to backcatalog at %s",
555               latest_fname, tmpdir);
556    }
557    mr_free(command);
558
559    last = g_tapecatalog->entries - 1;
560    if (last <= 0) {
561        log_it("Too early to start deleting from collection.");
562        mr_free(tmpdir);
563        return (0);
564    }
565    final_alleged_writeK = g_tapecatalog->el[last].tape_posK;
566    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
567    for (curr = last; curr >= 0; curr--) {
568        cposK = g_tapecatalog->el[curr].tape_posK;
569        if (cposK < final_projected_certain_writeK) {
570            break;
571        }
572    }
573    if (curr < 0) {
574        log_it("Not far enough into tape to start deleting old archives from collection.");
575        mr_free(tmpdir);
576        return (0);
577    }
578
579    for (i = curr - 1; i >= 0 && curr - i < 10; i--) {
580        mr_asprintf(&old_fname, "%s/%s", tmpdir, g_tapecatalog->el[i].fname);
581        unlink(old_fname);
582        mr_free(old_fname);
583    }
584    mr_free(tmpdir);
585    return (0);
586}
587
588
589
590
591/**
592 * Open the CD stream for input.
593 * @param bkpinfo The backup information structure. Passed to openin_tape().
594 * @return 0 for success, nonzero for failure.
595 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
596 */
597int openin_cdstream()
598{
599    return (openin_tape());
600}
601
602/**
603 * FIFO used to read/write to the tape device.
604 * @bug This seems obsolete now that we call an external @c buffer program. Please look onto this.
605 */
606char g_tape_fifo[MAX_STR_LEN];
607
608
609
610int set_tape_block_size_with_mt(long internal_tape_block_size)
611{
612    char *tmp = NULL;
613    int res;
614
615    if (strncmp(bkpinfo->media_device, "/dev/", 5)) {
616        log_msg(1,
617                "Not using 'mt setblk'. This isn't an actual /dev entry.");
618        return (0);
619    }
620    mr_asprintf(&tmp, "mt -f %s setblk %ld", bkpinfo->media_device, internal_tape_block_size);
621    res = run_program_and_log_output(tmp, 3);
622    mr_free(tmp);
623    return (res);
624}
625
626/**
627 * Return the non-rewinding device when passed the normal one
628 * @param tapedev The tape device to open for writing.
629 * @note the caller needs to free the string returned
630 */
631char *get_non_rewind_dev(char *tapedev)
632{
633
634    char *ntapedev = NULL;
635    char *p = NULL;
636    char *q = NULL;
637    char *r = NULL;
638
639    ntapedev = (char *)malloc(strlen(tapedev)+sizeof(char));
640    p = strrchr(tapedev,'/');
641    if (p == NULL) {
642        log_it("Didn't find a '/' in %s",tapedev);
643        return(NULL);
644    }
645
646    /* Copy tapedev content up to the last / */
647    q = tapedev;
648    r = ntapedev;
649    while (q != p) {
650        *r = *q;
651        r++;
652        q++;
653    }
654    /* Copy the '/' */
655    *r = *q;
656    r++;
657    q++;
658    /* Adds a 'n' - non-rewinding */
659    *r = 'n';
660    r++;
661    /* Copy the rest of tapedev */
662    while (*q != '\0') {
663        *r = *q;
664        r++;
665        q++;
666    }
667    *r = '\0';
668    if (mt_says_tape_exists(ntapedev)) {
669        log_it("Non-rewinding tape device is %s",ntapedev);
670    } else {
671        log_it("Unable to find non-rewinding tape device.");
672        ntapedev = NULL;
673    }
674    return(ntapedev);
675}
676
677
678
679/**
680 * Handle OBDR if we were asked to do so
681 * @param tapedev The tape device to open for reading.
682 */
683int skip_obdr(void)
684{
685    char *command = NULL;
686    int res = 0;
687
688    log_it("Skipping OBDR headers");
689    mr_asprintf(&command, "mt -f %s rewind",bkpinfo->media_device);
690    res = run_program_and_log_output(command, 1);
691    paranoid_free(command);
692
693    mr_asprintf(&command, "mt -f %s fsf 2",bkpinfo->media_device);
694    res = run_program_and_log_output(command, 1);
695    paranoid_free(command);
696
697    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
698    return(res);
699}
700
701/**
702 * Handle OBDR if we were asked to do so
703 * @param tapedev The tape device to open for writing.
704 * @return 0 for success, nonzero for failure.
705 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
706 * EXISTING DATA on the tape!
707 */
708int create_obdr(void)
709{
710
711    char *command = NULL;
712    int res = 0;
713
714    log_it("Creating OBDR headers");
715    /* OBDR: First block 10 kB of zero bs = 512 */
716    mr_asprintf(&command, "mt -f %s compression off",bkpinfo->media_device);
717    res = run_program_and_log_output(command, 1);
718    paranoid_free(command);
719
720    mr_asprintf(&command, "mt -f %s rewind",bkpinfo->media_device);
721    res += run_program_and_log_output(command, 1);
722    paranoid_free(command);
723
724    set_tape_block_size_with_mt(512);
725
726    mr_asprintf(&command, "dd if=/dev/zero of=%s bs=512 count=20",bkpinfo->media_device);
727    res += run_program_and_log_output(command, 1);
728    paranoid_free(command);
729
730    /* OBDR: then ISO boot image bs = 2048 */
731    set_tape_block_size_with_mt(2048);
732
733    mr_asprintf(&command, "dd if=%s of=%s bs=2048",MINDI_CACHE"/mondorescue.iso",bkpinfo->media_device);
734    res += run_program_and_log_output(command, 1);
735    paranoid_free(command);
736
737    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
738
739    /* restore compression mode on */
740    mr_asprintf(&command, "mt -f %s compression on",bkpinfo->media_device);
741    res = run_program_and_log_output(command, 1);
742    paranoid_free(command);
743
744    return(res);
745}
746
747
748/**
749 * Open the tape device for input.
750 * @param bkpinfo The backup information structure. Fields used:
751 * - @c bkpinfo->media_device
752 * - @c bkpinfo->tmpdir
753 * @return 0 for success, nonzero for failure.
754 * @note This will also work with a cdstream for now, but don't count on this behavior.
755 */
756int openin_tape()
757{
758    /*@ buffer ***************************************************** */
759    char fname[MAX_STR_LEN];
760    char *datablock;
761    char *tmp = NULL;
762    char old_cwd[MAX_STR_LEN];
763    char *outfname = NULL;
764    /*@ int ******************************************************* */
765    int i;
766    int j;
767    int res = 0;
768    long length, templong;
769    size_t k;
770    int retval = 0;
771    int ctrl_chr;
772
773    /*@ long long ************************************************* */
774    long long size;
775
776    /*@ pointers ************************************************** */
777    FILE *fout;
778
779    /*@ end vars *************************************************** */
780
781    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
782    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
783        fatal_error("Cannot alloc mem for tape catalog");
784    }
785    g_tapecatalog->entries = 0;
786    g_tape_posK = 0;
787    if (g_tape_stream) {
788        log_it("FYI - I won't 'openin' the tape. It's already open.");
789        return (0);
790    }
791
792    // mondoarchive should have configured everything to give the right non-rew device
793    if ((bkpinfo->use_obdr) && (bkpinfo->media_device != NULL)) {
794        res = skip_obdr();
795        if (res != 0) {
796            log_it("Not able to skip OBDR - Restore will have to be done manually");
797        }
798    } else {
799        if (bkpinfo->media_device == NULL) {
800            log_it("Not able to skip OBDR - Restore will have to be done manually");
801        }
802        set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
803    }
804
805    insist_on_this_tape_number(1);
806    mr_asprintf(&outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
807    make_hole_for_file(outfname);
808
809//  start_buffer_process( bkpinfo->media_device, g_tape_fifo, FALSE);
810    log_it("Opening IN tape");
811    if (!
812        (g_tape_stream =
813         open_device_via_buffer(bkpinfo->media_device, 'r',
814                                bkpinfo->internal_tape_block_size))) {
815        log_OS_error(g_tape_fifo);
816        log_to_screen("Cannot openin stream device");
817        mr_free(outfname);
818        return (1);
819    }
820    log_to_screen("Reading stream");
821    log_it("stream device = '%s'", bkpinfo->media_device);
822/* skip data disks */
823    open_evalcall_form("Skipping data disks on stream");
824    log_to_screen("Skipping data disks on stream");
825    if (!(fout = fopen(outfname, "w"))) {
826        log_OS_error(outfname);
827        log_to_screen("Cannot openout datadisk all.tar.gz file");
828        mr_free(outfname);
829        return (-1);
830    }
831    if (!(datablock = (char *) malloc(256 * 1024))) {
832        log_to_screen("Unable to malloc 256*1024");
833        mr_free(outfname);
834        finish(1);
835    }
836    for (i = 0; i < 32; i++) {
837        for (j = 0; j < 4; j++) {
838            for (length = 0, k = 0; length < 256 * 1024; length += k) {
839                k = fread(datablock + length, 1, 256 * 1024 - length,
840                          g_tape_stream);
841            }
842            if (fwrite(datablock, 1, (size_t) length, fout)) {
843                // FIXME
844            }
845            g_tape_posK += length / 1024;
846        }
847        if (i > 8)              // otherwise, 'buffer' distorts calculations
848        {
849            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
850            update_evalcall_form((int) (templong));
851        }
852    }
853    paranoid_fclose(fout);
854    paranoid_free(datablock);
855
856/* find initial blocks */
857    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
858    retval += res;
859    if (ctrl_chr != BLK_START_OF_TAPE) {
860        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
861    }
862    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
863    retval += res;
864    if (ctrl_chr != BLK_START_OF_BACKUP) {
865        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
866    }
867    close_evalcall_form();
868    log_it("Saved all.tar.gz to '%s'", outfname);
869    if (getcwd(old_cwd, MAX_STR_LEN)) {
870        // FIXME
871    }
872    if (chdir(bkpinfo->tmpdir)) {
873        // FIXME
874    }
875    mr_asprintf(&tmp, "tar -zxf %s ./tmp/mondo-restore.cfg 2> /dev/null",
876            outfname);
877    paranoid_system(tmp);
878    mr_free(tmp);
879
880    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
881    if (chdir(old_cwd)) {
882        // FIXME
883    }
884    unlink(outfname);
885    mr_free(outfname);
886    return (retval);
887}
888
889
890/**
891 * Start writing to a CD stream.
892 * @param cddev The CD device to openout via cdrecord.
893 * @param speed The speed to write at.
894 * @return 0 for success, nonzero for failure.
895 * @note This should be called only from backup processes.
896 */
897int openout_cdstream(char *cddev, int speed)
898{
899    /*@ buffers ***************************************************** */
900    char *command = NULL;
901
902    /*@ end vars *************************************************** */
903
904    /*  add 'dummy' if testing */
905    mr_asprintf(&command, "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s", cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
906    /*  initialise the catalog */
907    g_current_media_number = 1;
908    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
909        fatal_error("Cannot alloc mem for tape catalog");
910    }
911    g_tapecatalog->entries = 0;
912    /* log stuff */
913    log_it("Opening OUT cdstream with the command");
914    log_it(command);
915    /*  log_it("Let's see what happens, shall we?"); */
916    g_tape_stream = popen(command, "w");
917    mr_free(command);
918
919    if (g_tape_stream) {
920        return (0);
921    } else {
922        log_to_screen("Failed to openout to cdstream (fifo)");
923        return (1);
924    }
925}
926
927
928/**
929 * Start writing to a tape device for the backup.
930 * Handle OBDR if we were asked to do so
931 * @param tapedev The tape device to open for writing.
932 * @return 0 for success, nonzero for failure.
933 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
934 * EXISTING DATA on the tape!
935 */
936int openout_tape() {
937
938g_current_media_number = 1;
939if (g_tape_stream) {
940    log_it("FYI - I won't 'openout' the tape. It's already open.");
941    return (0);
942}
943if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
944    fatal_error("Cannot alloc mem for tape catalog");
945}
946g_tapecatalog->entries = 0;
947g_tape_posK = 0;
948
949if (bkpinfo->use_obdr) {
950    create_obdr();
951} else {
952    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
953}
954log_it("Opening OUT tape");
955if (!
956    (g_tape_stream =
957     open_device_via_buffer(bkpinfo->media_device, 'w', bkpinfo->internal_tape_block_size))) {
958    log_OS_error(g_tape_fifo);
959    log_to_screen("Cannot openin stream device");
960    return (1);
961}
962return (0);
963}
964
965
966
967
968/**
969 * Copy a file from the opened stream (CD or tape) to @p outfile.
970 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
971 * @param outfile The file to write to.
972 * @param size The size of the file in the input stream.
973 * @return 0 for success, nonzero for failure.
974 */
975int
976read_file_from_stream_to_file(char *outfile, long long size)
977{
978
979    /*@ int ******************************************************** */
980    int res;
981
982    /*@ end vars *************************************************** */
983
984    res = read_file_from_stream_FULL(outfile, NULL, size);
985
986    return (res);
987}
988
989
990
991/**
992 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
993 * by @p fout.
994 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
995 * @param fout The stream to write the file to.
996 * @param size The size of the file in bytes.
997 * @return 0 for success, nonzero for failure.
998 */
999int
1000read_file_from_stream_to_stream(FILE * fout, long long size)
1001{
1002
1003    /*@ int ******************************************************** */
1004    int res;
1005
1006    /*@ end vars *************************************************** */
1007
1008    res = read_file_from_stream_FULL(NULL, fout, size);
1009/*  fflush(g_tape_stream);
1010  fflush(fout);*/
1011    return (res);
1012}
1013
1014
1015
1016/**
1017 * Copy a file from the currently opened stream (CD or tape) to either a
1018 * @c FILE pointer indicating a currently-opened file, or a filename indicating
1019 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
1020 * and read_file_from_stream_to_stream() are wrappers for.
1021 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1022 * @param outfname If non-NULL, write to this file.
1023 * @param foutstream If non-NULL, write to this stream.
1024 * @param orig_size The original length of the file in bytes.
1025 * @return 0 for success, nonzero for failure.
1026 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
1027 */
1028int
1029read_file_from_stream_FULL(char *outfname, FILE * foutstream, long long orig_size)
1030{
1031    /*@ buffers ***************************************************** */
1032    char *tmp = NULL;
1033    char *datablock;
1034    char *temp_fname;
1035    char *temp_cksum;
1036    char *actual_cksum = NULL;
1037//  char *pA, *pB;
1038
1039    /*@ int ********************************************************* */
1040    int retval = 0;
1041#ifdef EXTRA_TAPE_CHECKSUMS
1042    int i, ch;
1043#endif
1044    int noof_blocks;
1045    int ctrl_chr;
1046    int res;
1047    /*@ pointers **************************************************** */
1048    FILE *fout;
1049
1050    /*@ long    ***************************************************** */
1051    long bytes_to_write = 0L /*,i */ ;
1052//  long bytes_successfully_read_in_this_time = 0;
1053
1054    /*@ long long *************************************************** */
1055    long long temp_size, size;
1056    long bytes_read, bytes_to_read;
1057    long long total_read_from_tape_for_this_file = 0;
1058    long long where_I_was_before_tape_change = 0;
1059    /*@ unsigned int ************************************************ */
1060    /*  unsigned int ch; */
1061    unsigned int crc16;
1062    unsigned int crctt;
1063
1064    /*@ init  ******************************************************* */
1065    malloc_string(temp_fname);
1066    malloc_string(temp_cksum);
1067    datablock = malloc(TAPE_BLOCK_SIZE);
1068    crc16 = 0;
1069    crctt = 0;
1070    size = orig_size;
1071
1072    /*@ end vars *************************************************** */
1073
1074    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1075    if (res) {
1076        // FIXME
1077    }
1078    if (orig_size != temp_size && orig_size != -1) {
1079        mr_asprintf(&tmp, "output file's size should be %ld K but is apparently %ld K", (long) size >> 10, (long) temp_size >> 10);
1080        log_to_screen(tmp);
1081        mr_free(tmp);
1082    }
1083    if (ctrl_chr != BLK_START_FILE) {
1084        wrong_marker(BLK_START_FILE, ctrl_chr);
1085        return (1);
1086    }
1087
1088    if (foutstream) {
1089        fout = foutstream;
1090    } else {
1091        fout = fopen(outfname, "w");
1092    }
1093    if (!fout) {
1094        log_OS_error(outfname);
1095        log_to_screen("Cannot openout file");
1096        return (1);
1097    }
1098    total_read_from_tape_for_this_file = 0;
1099    for (noof_blocks = 0; size > 0;
1100         noof_blocks++, size -=
1101         bytes_to_write, total_read_from_tape_for_this_file +=
1102         bytes_read) {
1103        bytes_to_write =
1104            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1105        bytes_to_read = TAPE_BLOCK_SIZE;
1106        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1107        while (bytes_read < bytes_to_read) {    // next tape!
1108//    crctt=crc16=0;
1109            where_I_was_before_tape_change = size;
1110            log_msg(4, "where_I_was_... = %lld",
1111                    where_I_was_before_tape_change);
1112            start_to_read_from_next_tape();
1113            log_msg(4, "Started reading from next tape.");
1114            skip_incoming_files_until_we_find_this_one(temp_fname);
1115            log_msg(4, "Skipped irrelevant files OK.");
1116            for (size = orig_size; size > where_I_was_before_tape_change;
1117                 size -= bytes_to_write) {
1118                bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1119            }
1120            log_msg(4, "'size' is now %lld (should be %lld)", size,
1121                    where_I_was_before_tape_change);
1122            log_to_screen("Successfully re-sync'd tape");
1123            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1124        }
1125
1126        if (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
1127            // FIXME
1128        }
1129
1130#ifdef EXTRA_TAPE_CHECKSUMS
1131        for (i = 0; i < (int) bytes_to_write; i++) {
1132            ch = datablock[i];
1133            crc16 = updcrcr(crc16, (unsigned) ch);
1134            crctt = updcrc(crctt, (unsigned) ch);
1135        }
1136#endif
1137    }
1138    log_msg(6, "Total read from tape for this file = %lld",
1139            total_read_from_tape_for_this_file);
1140    log_msg(6, ".......................... Should be %lld", orig_size);
1141    g_tape_posK += total_read_from_tape_for_this_file / 1024;
1142    mr_asprintf(&actual_cksum, "%04x%04x", crc16, crctt);
1143    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
1144    } else {
1145        paranoid_fclose(fout);
1146    }
1147    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
1148    if (ctrl_chr != BLK_STOP_FILE) {
1149        wrong_marker(BLK_STOP_FILE, ctrl_chr);
1150    }
1151    if (strcmp(temp_cksum, actual_cksum)) {
1152        mr_asprintf(&tmp, "actual cksum=%s; recorded cksum=%s", actual_cksum,
1153                temp_cksum);
1154        log_to_screen(tmp);
1155        mr_free(tmp);
1156
1157        mr_asprintf(&tmp, "%s (%ld K) is corrupt on tape", temp_fname,
1158                (long) orig_size >> 10);
1159        log_to_screen(tmp);
1160        mr_free(tmp);
1161
1162        retval++;
1163    }
1164    mr_free(actual_cksum);
1165
1166    paranoid_free(datablock);
1167    paranoid_free(temp_fname);
1168    paranoid_free(temp_cksum);
1169    return (retval);
1170}
1171
1172
1173
1174/**
1175 * Read a header block from the currently opened stream (CD or tape).
1176 * This block indicates the length of the following file (if it's file-related)
1177 * the filename (if it's file-related), and the block type.
1178 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
1179 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
1180 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
1181 * @return 0 for success, nonzero for failure.
1182 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
1183 */
1184int
1185read_header_block_from_stream(long long *plen, char *filename,
1186                              int *pcontrol_char)
1187{
1188
1189    /*@ buffers ***************************************************** */
1190    char *tempblock;
1191
1192    /*@ int ********************************************************* */
1193    int i, retval;
1194
1195    /*@ end vars *************************************************** */
1196
1197    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
1198
1199    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1200        tempblock[i] = 0;
1201    }
1202    while (!(*pcontrol_char = tempblock[7000])) {
1203        g_tape_posK += fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream) / 1024;
1204    }
1205/*  memcpy((char*)plength_of_incoming_file,(char*)tempblock+7001,sizeof(long long)); */
1206/*  for(*plen=0,i=7;i>=0;i--) {*plen<<=8; *plen |= tempblock[7001+i];} */
1207    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1208    if (strcmp(tempblock + 6000 + *pcontrol_char, STR_HEADER)) {
1209        log_it("Bad header block at %ld K", (long) g_tape_posK);
1210    }
1211    strcpy(filename, tempblock + 1000);
1212/*  strcpy(cksum,tempblock+5555);*/
1213/*  log_it( "%s  (reading) fname=%s, filesize=%ld K",
1214       marker_to_string (*pcontrol_char), filename,
1215       (long) ((*plen) >> 10));
1216*/
1217    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1218        log_to_screen("I can't verify an aborted backup.");
1219        retval = 1;
1220    } else {
1221        retval = 0;
1222    }
1223    for (i = 1000; i < 1020; i++) {
1224        if (tempblock[i] < 32 || tempblock[i] > 126) {
1225            tempblock[i] = ' ';
1226        }
1227    }
1228    tempblock[i] = '\0';
1229    log_msg(6, "%s (fname=%s, size=%ld K)",
1230            marker_to_string(*pcontrol_char), tempblock + 1000,
1231            (long) (*plen) >> 10);
1232    paranoid_free(tempblock);
1233    return (retval);
1234}
1235
1236
1237
1238/**
1239 * Add specified file/slice to the internal catalog of all archives written.
1240 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1241 * write the last [buffer size] MB from the catalog to the new tape, so we know
1242 * we have @e all archives on some CD/tape/whatever.
1243 * @param type The type of file we're cataloging (afioball, slice, something else)
1244 * @param number The fileset number or biggiefile number.
1245 * @param aux The slice number if it's a biggiefile, or any other additional info.
1246 * @param fn The original full pathname of the file we're recording.
1247 * @return The index of the record we just added.
1248 */
1249int register_in_tape_catalog(t_archtype type, int number, long aux,
1250                             char *fn)
1251{
1252    int last;
1253    char fname[MAX_TAPECAT_FNAME_LEN+1];
1254    char *p;
1255
1256    p = strrchr(fn, '/');
1257    if (p) {
1258        p++;
1259    } else {
1260        p = fn;
1261    }
1262    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1263    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1264    last = g_tapecatalog->entries;
1265    if (last >= MAX_TAPECATALOG_ENTRIES) {
1266        log_it
1267            ("Warning - can't log #%d in tape catalog - too many entries already",
1268             number);
1269        return (-1);
1270    }
1271    g_tapecatalog->el[last].type = type;
1272    g_tapecatalog->el[last].number = number;
1273    g_tapecatalog->el[last].aux = aux;
1274    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1275    strcpy(g_tapecatalog->el[last].fname, fname);
1276    g_tapecatalog->entries++;
1277    return (last);              // returns the index of the record we've jsut added
1278}
1279
1280
1281
1282
1283/**
1284 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1285 * (got SIGPIPE) or look like we will.
1286 * @param mediasize The size of the tape in megabytes.
1287 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1288 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1289 * autodetecting the size. Huh?
1290 */
1291
1292/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1293bool
1294should_we_write_to_next_tape(long mediasize,
1295                             off_t length_of_incoming_file)
1296{
1297    /*@ bool's ***************************************************** */
1298    bool we_need_a_new_tape = FALSE;
1299
1300    /*@ end vars *************************************************** */
1301
1302    if (mediasize == 0) {
1303        return (FALSE);
1304    }
1305    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1306        log_it("mediasize = %ld", mediasize);
1307        we_need_a_new_tape = TRUE;
1308        log_to_screen("Should have started a new tape/CD already");
1309    }
1310    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1311        mediasize - (SLICE_SIZE * 4 / 1024)) {
1312        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1313               mediasize);
1314        we_need_a_new_tape = TRUE;
1315    }
1316    return (we_need_a_new_tape);
1317}
1318
1319
1320/**
1321 * Seek through the stream until we find a header block where the NAME field matches
1322 * @p the_file_I_was_reading. This is useful if you've just started reading from
1323 * a new tape and want to find the file you were reading when the tape ended.
1324 * @param the_file_I_was_reading File name to look for.
1325 * @return 0 for success, nonzero for failure.
1326 */
1327int skip_incoming_files_until_we_find_this_one(char
1328                                               *the_file_I_was_reading)
1329{
1330    char *pA;
1331    char *pB;
1332    int res;
1333    int ctrl_chr;
1334    char *temp_fname;
1335    char *datablock;
1336    long long temp_size, size;
1337    long bytes_to_write;
1338
1339    datablock = malloc(TAPE_BLOCK_SIZE);
1340    malloc_string(temp_fname);
1341    pB = strrchr(the_file_I_was_reading, '/');
1342    if (pB) {
1343        pB++;
1344    } else {
1345        pB = the_file_I_was_reading;
1346    }
1347    log_msg(1, "skip_incoming_..(%s)", pB);
1348    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1349    ctrl_chr = -1;
1350    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1351        res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1352        if (res) {
1353            // FIXME
1354        }
1355        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1356            break;
1357        }
1358        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1359        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1360        log_msg(3, "Still trying to re-sync w/ tape");
1361    }
1362    while (ctrl_chr != BLK_START_FILE) {
1363        res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1364        if (ctrl_chr == BLK_START_FILE) {
1365            break;
1366        }
1367        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1368        wrong_marker(BLK_START_FILE, ctrl_chr);
1369        log_msg(3, "Still trying to re-sync w/ tape");
1370    }
1371    pA = strrchr(temp_fname, '/');
1372    if (pA) {
1373        pA++;
1374    } else {
1375        pA = temp_fname;
1376    }
1377    pB = strrchr(the_file_I_was_reading, '/');
1378    if (pB) {
1379        pB++;
1380    } else {
1381        pB = the_file_I_was_reading;
1382    }
1383    while (strcmp(pA, pB)) {
1384        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1385                the_file_I_was_reading);
1386        for (size = temp_size; size > 0; size -= bytes_to_write) {
1387            bytes_to_write =
1388                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1389            if (fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream)) {
1390                // FIXME - needs error-checking and -catching
1391            }
1392        }
1393        res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1394        if (ctrl_chr != BLK_STOP_FILE) {
1395            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1396        }
1397        res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1398        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1399            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1400        }
1401        res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1402        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1403            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1404        }
1405        res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1406        if (ctrl_chr != BLK_START_FILE) {
1407            wrong_marker(BLK_START_FILE, ctrl_chr);
1408        }
1409        pA = strrchr(temp_fname, '/');
1410        if (pA) {
1411            pA++;
1412        } else {
1413            pA = temp_fname;
1414        }
1415        pB = strrchr(the_file_I_was_reading, '/');
1416        if (pB) {
1417            pB++;
1418        } else {
1419            pB = the_file_I_was_reading;
1420        }
1421    }
1422    log_msg(2, "Reading %s (it matches %s)", temp_fname,
1423            the_file_I_was_reading);
1424    paranoid_free(temp_fname);
1425    paranoid_free(datablock);
1426    return (0);
1427}
1428
1429
1430/**
1431 * Start to read from the next tape. Assumes the user has already inserted it.
1432 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1433 * @return 0 for success, nonzero for failure.
1434 */
1435int start_to_read_from_next_tape()
1436{
1437    /*@ int ********************************************************* */
1438    int res = 0;
1439    char *sz_msg;
1440    int ctrlchr;
1441    long long temp_size;
1442    malloc_string(sz_msg);
1443    /*@ end vars *************************************************** */
1444
1445    paranoid_pclose(g_tape_stream);
1446    sync();
1447    sync();
1448    sync();
1449    log_it("Next tape requested.");
1450    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1451    log_it("Opening IN the next tape");
1452    if (!
1453        (g_tape_stream =
1454         open_device_via_buffer(bkpinfo->media_device, 'r',
1455                                bkpinfo->internal_tape_block_size))) {
1456        log_OS_error(g_tape_fifo);
1457        log_to_screen("Cannot openin stream device");
1458        return (1);
1459    }
1460    g_tape_posK = 0;
1461    g_sigpipe = FALSE;
1462    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1463    if (ctrlchr != BLK_START_OF_TAPE) {
1464        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1465    }
1466    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1467    if (ctrlchr != BLK_START_OF_BACKUP) {
1468        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1469    } else {
1470        log_msg(3, "Next tape opened OK. Whoopee!");
1471    }
1472    paranoid_free(sz_msg);
1473    return (res);
1474}
1475
1476
1477
1478/**
1479 * Start to write to the next tape. Assume the user has already inserted it.
1480 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1481 * @return 0 for success, nonzero for failure.
1482 */
1483int start_to_write_to_next_tape()
1484{
1485    int res = 0;
1486    char *command = NULL;
1487
1488    paranoid_pclose(g_tape_stream);
1489    paranoid_system("sync");
1490    paranoid_system("sync");
1491    paranoid_system("sync");
1492    log_it("New tape requested.");
1493    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1494    if (g_current_media_number > MAX_NOOF_MEDIA) {
1495        res++;
1496        log_to_screen("Too many tapes. Man, you need to use nfs!");
1497    }
1498    if (bkpinfo->backup_media_type == cdstream) {
1499        mr_asprintf(&command,
1500                "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1501                bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE,
1502                MONDO_LOGFILE);
1503        log_it("Opening OUT to next CD with the command");
1504        log_it(command);
1505        log_it("Let's see what happens, shall we?");
1506        g_tape_stream = popen(command, "w");
1507        mr_free(command);
1508
1509        if (!g_tape_stream) {
1510            log_to_screen("Failed to openout to cdstream (fifo)");
1511            return (1);
1512        }
1513    } else {
1514        log_it("Opening OUT to next tape");
1515        if (!
1516            (g_tape_stream =
1517             open_device_via_buffer(bkpinfo->media_device, 'w',
1518                                    bkpinfo->internal_tape_block_size))) {
1519            log_OS_error(g_tape_fifo);
1520            log_to_screen("Cannot openin stream device");
1521            return (1);
1522        }
1523    }
1524    g_tape_posK = 0;
1525    g_sigpipe = FALSE;
1526    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1527    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1528    return (res);
1529}
1530
1531
1532
1533
1534/**
1535 * Write a bufferfull of the most recent archives to the tape. The
1536 * rationale behind this is a bit complex. If the previous tape ended
1537 * suddenly (EOF or otherwise) some archives were probably left in the
1538 * buffer. That means that Mondo thinks they have been written, but
1539 * the external binary @c buffer has not actually written them. So to
1540 * be safe, we start the new tape by writing the last bufferfull from
1541 * the old one. This insures that all archives will be on at least
1542 * one tape. Sounds inelegant, but it works.
1543 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1544 * @return 0 for success, nonzero for failure.
1545 */
1546int write_backcatalog_to_tape()
1547{
1548    int i, last, res = 0;
1549    char *fname = NULL;
1550
1551    log_msg(2, "I am now writing back catalog to tape");
1552    last = g_tapecatalog->entries - 1;
1553    for (i = 0; i <= last; i++) {
1554        mr_asprintf(&fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir, g_tapecatalog->el[i].fname);
1555        if (!does_file_exist(fname)) {
1556            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1557        } else {
1558            write_header_block_to_stream(length_of_file(fname),
1559                                         "start-backcatalog-afio-or-slice",
1560                                         BLK_START_AN_AFIO_OR_SLICE);
1561            log_msg(2, "Writing %s", fname);
1562            if (write_file_to_stream_from_file(fname)) {
1563                res++;
1564                log_msg(2, "%s failed", fname);
1565            }
1566            if (i != last) {
1567                write_header_block_to_stream((off_t)0,
1568                                             "stop-backcatalog-afio-or-slice",
1569                                             BLK_STOP_AN_AFIO_OR_SLICE);
1570            }
1571        }
1572        mr_free(fname);
1573    }
1574    log_msg(2, "Finished writing back catalog to tape");
1575    return (res);
1576}
1577
1578
1579
1580/**
1581 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1582 * @param fname The path to all.tar.gz.
1583 * @return 0 for success, nonzero for failure.
1584 */
1585int write_data_disks_to_stream(char *fname)
1586{
1587    /*@ pointers *************************************************** */
1588    FILE *fin;
1589    char *tmp = NULL;
1590
1591    /*@ long ******************************************************* */
1592    long m = -1;
1593    long templong;
1594
1595    /*@ int ******************************************************** */
1596    int i, j;
1597
1598    /*@ buffers **************************************************** */
1599    char tempblock[256 * 1024];
1600
1601    /*@ end vars *************************************************** */
1602
1603    open_evalcall_form("Writing data disks to tape");
1604    log_to_screen("Writing data disks to tape");
1605    log_it("Data disks = %s", fname);
1606    if (!does_file_exist(fname)) {
1607        mr_asprintf(&tmp, "Cannot find %s", fname);
1608        log_to_screen(tmp);
1609        mr_free(tmp);
1610        return (1);
1611    }
1612    if (!(fin = fopen(fname, "r"))) {
1613        log_OS_error(fname);
1614        fatal_error("Cannot openin the data disk");
1615    }
1616    for (i = 0; i < 32; i++) {  /* 32MB */
1617        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1618            if (!feof(fin)) {
1619                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1620            } else {
1621                m = 0;
1622            }
1623            for (; m < 256 * 1024; m++) {
1624                tempblock[m] = '\0';
1625            }
1626            g_tape_posK +=
1627                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1628        }
1629        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1630        {
1631            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1632            update_evalcall_form((int) (templong));
1633        }
1634    }
1635    paranoid_fclose(fin);
1636    close_evalcall_form();
1637    return (0);
1638}
1639
1640
1641
1642
1643/**
1644 * Copy @p infile to the opened stream (CD or tape).
1645 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1646 * @param infile The file to write to the stream.
1647 * @return 0 for success, nonzero for failure.
1648 */
1649int write_file_to_stream_from_file(char *infile)
1650{
1651    /*@ buffers **************************************************** */
1652    char *tmp = NULL;
1653    char datablock[TAPE_BLOCK_SIZE];
1654    char *checksum = NULL;
1655    char *infile_basename;
1656
1657    /*@ int ******************************************************** */
1658    int retval = 0;
1659    int noof_blocks;
1660
1661    /*  unsigned int ch; */
1662    unsigned int crc16;
1663    unsigned int crctt;
1664
1665    /*@ pointers *************************************************** */
1666    FILE *fin;
1667    char *p;
1668
1669    /*@ long ******************************************************* */
1670    long bytes_to_read = 0;
1671    long i;
1672
1673    off_t filesize;
1674
1675#ifdef EXTRA_TAPE_CHECKSUMS
1676    int ch;
1677#endif
1678
1679    /*@ initialize ************************************************ */
1680    crc16 = 0;
1681    crctt = 0;
1682
1683
1684
1685    /*@ end vars *************************************************** */
1686
1687    infile_basename = strrchr(infile, '/');
1688    if (infile_basename) {
1689        infile_basename++;
1690    } else {
1691        infile_basename = infile;
1692    }
1693    filesize = length_of_file(infile);
1694    if (should_we_write_to_next_tape
1695        (bkpinfo->media_size[g_current_media_number], filesize)) {
1696        start_to_write_to_next_tape();
1697        write_backcatalog_to_tape();
1698    }
1699    p = strrchr(infile, '/');
1700    if (!p) {
1701        p = infile;
1702    } else {
1703        p++;
1704    }
1705    mr_asprintf(&tmp, "Writing file '%s' to tape (%ld KB)", p,
1706            (long) filesize >> 10);
1707    log_it(tmp);
1708    mr_free(tmp);
1709    write_header_block_to_stream(filesize, infile_basename,
1710                                 BLK_START_FILE);
1711//go_here_to_restart_saving_of_file:
1712    if (!(fin = fopen(infile, "r"))) {
1713        log_OS_error(infile);
1714        return (1);
1715    }
1716    for (noof_blocks = 0; filesize > 0;
1717         noof_blocks++, filesize -= bytes_to_read) {
1718        if (filesize < TAPE_BLOCK_SIZE) {
1719            bytes_to_read = (long) filesize;
1720            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1721                datablock[i] = '\0';
1722            }
1723        } else {
1724            bytes_to_read = TAPE_BLOCK_SIZE;
1725        }
1726        if (fread(datablock, 1, (size_t) bytes_to_read, fin)) {
1727            // FIXME
1728        }
1729        g_tape_posK +=
1730            fwrite(datablock, 1, /*bytes_to_read */ 
1731                   (size_t) TAPE_BLOCK_SIZE,
1732                   g_tape_stream) / 1024;
1733        if (g_sigpipe) {
1734            log_it("Sigpipe occurred recently. I'll start a new tape.");
1735            fclose(fin);
1736            g_sigpipe = FALSE;
1737            start_to_write_to_next_tape();
1738            write_backcatalog_to_tape();    // kinda-sorta recursive :)
1739            return (0);
1740        }
1741#ifdef EXTRA_TAPE_CHECKSUMS
1742        for (i = 0; i < bytes_to_read; i++) {
1743            ch = datablock[i];
1744            crc16 = updcrcr(crc16, (unsigned) ch);
1745            crctt = updcrc(crctt, (unsigned) ch);
1746        }
1747#endif
1748    }
1749    paranoid_fclose(fin);
1750    mr_asprintf(&checksum, "%04x%04x", crc16, crctt);
1751    /* BERLIOS: what does it do ??? */
1752    write_header_block_to_stream((off_t)g_current_media_number, checksum, BLK_STOP_FILE);
1753    mr_free(checksum);
1754
1755//  log_it("File '%s' written to tape.", infile);
1756    return (retval);
1757}
1758
1759
1760
1761
1762
1763/**
1764 * Write a header block to the opened stream (CD or tape).
1765 * @param length_of_incoming_file The length to store in the header block.
1766 * Usually matters only if this is a file-related header, in which case it should
1767 * be the length of the file that will follow.
1768 * @param filename The filename to store in the header block. Usually matters
1769 * only if this is a file-related header, in which case this should be the name
1770 * if the file that will follow.
1771 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1772 * @return 0 for success, nonzero for failure.
1773 */
1774int
1775write_header_block_to_stream(off_t length_of_incoming_file,
1776                             char *filename, int control_char)
1777{
1778    /*@ buffers **************************************************** */
1779    char tempblock[TAPE_BLOCK_SIZE];
1780    char *tmp = NULL;
1781    char *p;
1782
1783    /*@ int ******************************************************** */
1784    int i;
1785
1786    off_t olen;
1787
1788    /*@ end vars *************************************************** */
1789
1790
1791    olen = length_of_incoming_file;
1792    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1793    if (!p) {
1794        p = filename;
1795    } else {
1796        p++;
1797    }
1798    if (!g_tape_stream) {
1799        log_to_screen
1800            ("You're not backing up to tape. Why write a tape header?");
1801        return (1);
1802    }
1803    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1804        tempblock[i] = 0;
1805    }
1806    sprintf(tempblock + 6000 + control_char, STR_HEADER);
1807    tempblock[7000] = control_char;
1808    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1809    strcpy(tempblock + 1000, filename);
1810    g_tape_posK +=
1811        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1812               g_tape_stream) / 1024;
1813    mr_asprintf(&tmp, "%s (fname=%s, size=%ld K)",
1814            marker_to_string(control_char), p,
1815            (long) length_of_incoming_file >> 10);
1816    log_msg(6, tmp);
1817    mr_free(tmp);
1818    return (0);
1819}
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830/**
1831 * Log (to screen) an erroneous marker, along with what it should have been.
1832 * @param should_be What we were expecting.
1833 * @param it_is What we got.
1834 */
1835void wrong_marker(int should_be, int it_is)
1836{
1837    /*@ buffer ***************************************************** */
1838    char *tmp = NULL;
1839
1840
1841    /*@ end vars *************************************************** */
1842    mr_asprintf(&tmp, "Wrong marker! (Should be %s, is actually %s)", marker_to_string(should_be), marker_to_string(it_is));
1843    log_to_screen(tmp);
1844    mr_free(tmp);
1845}
1846
1847/* @} - end of streamGroup */
Note: See TracBrowser for help on using the repository browser.