source: branches/2.2.9/mondo/src/common/libmondo-stream.c @ 2230

Last change on this file since 2230 was 2230, checked in by bruno, 10 years ago
  • Simplify log_it calls when possible (with just a fixed string)
  • issue with truncate_to_drive_name reported by valgrind at restore time. Needs rewrite IMO
  • Property svn:keywords set to Id
File size: 51.7 KB
Line 
1/* libmondo-stream.c
2   $Id: libmondo-stream.c 2230 2009-06-17 20:53:23Z 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 2230 2009-06-17 20:53:23Z bruno $";
32extern bool g_sigpipe;
33extern int g_tape_buffer_size_MB;
34
35extern char *g_getfacl;
36extern char *g_getfattr;
37extern char *MONDO_LOGFILE;
38
39/* Reference to global bkpinfo */
40extern struct s_bkpinfo *bkpinfo;
41
42/**
43 * @addtogroup globalGroup
44 * @{
45 */
46/**
47 * The file pointer for the opened tape/CD stream.
48 * Opened and closed by openin_tape(), openin_cdstream(),
49 * openout_tape(), openout_cdstream(), closein_tape(), closein_cdstream(),
50 * closeout_tape(), and closeout_cdstream().
51 */
52FILE *g_tape_stream = NULL;
53
54
55/**
56 * The position (in kilobytes) where we are on the tape.
57 */
58long long g_tape_posK = 0;
59
60/**
61 * The current media number we're using. This value is 1-based.
62 */
63int g_current_media_number = -1;
64
65/**
66 * The tape catalog that keeps track of files written to tape.
67 */
68struct s_tapecatalog *g_tapecatalog;
69
70/* @} - end of globalGroup */
71
72int write_backcatalog_to_tape();
73
74
75
76
77
78/**
79 * @addtogroup streamGroup
80 * @{
81 */
82/**
83 * Close the global output file descriptor which Mondo has used to read
84 * from the CD stream.
85 * @param bkpinfo The backup information structure. Passed directly to closein_tape().
86 * @return 0 for success, nonzero for failure.
87 * @note This should be called by restore processes only.
88 */
89int closein_cdstream()
90{
91    return (closein_tape());
92}
93
94
95/**
96 * Close the global output file descriptor which Mondo has used to read
97 * from buffer or dd, which read from the tape.
98 * @param bkpinfo The backup information structure. Unused.
99 * @return 0 for success, nonzero for failure.
100 * @note This should be called by restore processes only.
101 * @note This function also works for cdstreams for now, but don't count on this behavior.
102 * @bug @p bkpinfo parameter is unused.
103 */
104int closein_tape()
105{
106    /*@ int's ******************************************************* */
107    int retval = 0;
108    int res = 0;
109    int ctrl_chr = '\0';
110
111    /*@ buffers ***************************************************** */
112    char fname[MAX_STR_LEN];
113
114    /*@ long long's ************************************************* */
115    long long size;
116    char *blk;
117    int i;
118
119    blk = (char *) malloc(256 * 1024);
120
121    log_it("closein_tape() -- entering");
122    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
123    retval += res;
124    if (ctrl_chr != BLK_END_OF_BACKUP) {
125        wrong_marker(BLK_END_OF_BACKUP, ctrl_chr);
126    }
127    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
128    retval += res;
129    if (ctrl_chr != BLK_END_OF_TAPE) {
130        wrong_marker(BLK_END_OF_TAPE, ctrl_chr);
131    }
132    for (i = 0; i < 8 && !feof(g_tape_stream); i++) {
133        (void) fread(blk, 1, 256 * 1024, g_tape_stream);
134    }
135    sleep(1);
136    paranoid_system("sync");
137    sleep(1);
138    paranoid_pclose(g_tape_stream);
139    log_it("closein_tape() -- leaving");
140/*
141  for(i=0; i < g_tapecatalog->entries; i++)
142    {
143      log_it("i=%d type=%s num=%d aux=%ld", i, (g_tapecatalog->el[i].type==fileset)?"fileset":"bigslice", g_tapecatalog->el[i].number, g_tapecatalog->el[i].aux);
144    }
145*/
146    if (!bkpinfo->please_dont_eject) {
147        eject_device(bkpinfo->media_device);
148    }
149    paranoid_free(blk);
150    paranoid_free(g_tapecatalog);
151    return (retval);
152}
153
154
155
156/**
157 * Close the global output file descriptor which Mondo has been using to write
158 * to the tape device (via buffer or dd).
159 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
160 * @return 0 for success, nonzero for failure.
161 * @note This should be called by backup processes only.
162 */
163int closeout_tape()
164{
165    /*@ int's ******************************************************* */
166    int retval = 0;
167//  int res = 0;
168//  int ctrl_chr = '\0';
169
170    /*@ buffers ***************************************************** */
171//  char fname[MAX_STR_LEN];
172
173    /*@ long long's ************************************************* */
174//  long long size;
175    int i;
176    char *blk;
177
178    blk = (char *) malloc(256 * 1024);
179
180    sleep(1);
181    paranoid_system("sync");
182    sleep(1);
183    log_it("closeout_tape() -- entering");
184    retval +=
185        write_header_block_to_stream((off_t)0, "end-of-backup",
186                                     BLK_END_OF_BACKUP);
187    retval += write_header_block_to_stream((off_t)0, "end-of-tape", BLK_END_OF_TAPE);   /* just in case */
188/* write 1MB of crap */
189    for (i = 0; i < 256 * 1024; i++) {
190        blk[i] = (int) (random() & 0xFF);
191    }
192    for (i = 0; i < 4 * 8; i++) {
193        (void) fwrite(blk, 1, 256 * 1024, g_tape_stream);
194        if (should_we_write_to_next_tape
195            (bkpinfo->media_size[g_current_media_number], (off_t)256 * 1024)) {
196            start_to_write_to_next_tape();
197        }
198    }
199/* write 1MB of zeroes */
200/*
201    for (i = 0; i < 256*1024; i++)
202      {
203        blk[i] = 0;
204      }
205    for (i = 0; i < 4; i++)
206      {
207        fwrite (blk, 1, 256*1024, g_tape_stream);
208        if (should_we_write_to_next_tape (bkpinfo->media_size[g_current_media_number], 256*1024))
209          {
210            start_to_write_to_next_tape ();
211          }
212      }
213*/
214    sleep(2);
215    paranoid_pclose(g_tape_stream);
216    log_it("closeout_tape() -- leaving");
217    for (i = 0; i < g_tapecatalog->entries; i++) {
218        log_it("i=%d type=%s num=%d aux=%ld posK=%lld", i,
219               (g_tapecatalog->el[i].type ==
220                fileset) ? "fileset" : "bigslice",
221               g_tapecatalog->el[i].number, g_tapecatalog->el[i].aux,
222               g_tapecatalog->el[i].tape_posK);
223    }
224    //  if (!bkpinfo->please_dont_eject)
225    //    { eject_device(bkpinfo->media_device); }
226    paranoid_free(blk);
227    paranoid_free(g_tapecatalog);
228    return (retval);
229}
230
231
232
233bool mt_says_tape_exists(char *dev)
234{
235    char *command;
236    int res;
237
238    malloc_string(command);
239    sprintf(command, "mt -f %s status", dev);
240    res = run_program_and_log_output(command, 1);
241    paranoid_free(command);
242    if (res) {
243        return (FALSE);
244    } else {
245        return (TRUE);
246    }
247}
248
249
250
251/**
252 * Determine the name and size of the tape device. Tries the SCSI tape for
253 * this platform, then the IDE tape, then "/dev/st0", then "/dev/osst0".
254 * @param dev Where to put the found tape device.
255 * @param siz Where to put the tape size (a string like "4GB")
256 * @return 0 if success, nonzero if failure (in which @p dev and @p siz are undefined).
257 */
258int find_tape_device_and_size(char *dev, char *siz)
259{
260    char tmp[MAX_STR_LEN];
261    char command[MAX_STR_LEN * 2];
262    char cdr_exe[MAX_STR_LEN];
263    int res;
264
265    log_to_screen("I am looking for your tape streamer. Please wait.");
266    dev[0] = siz[0] = '\0';
267    if (find_home_of_exe("cdrecord")) {
268        strcpy(cdr_exe, "cdrecord");
269    } else {
270        strcpy(cdr_exe, "dvdrecord");
271    }
272    sprintf(command, "%s -scanbus 2> /dev/null | grep -i tape | wc -l",
273            cdr_exe);
274    strcpy(tmp, call_program_and_get_last_line_of_output(command));
275    if (atoi(tmp) != 1) {
276        log_it
277            ("Either too few or too many tape streamers for me to detect...");
278        strcpy(dev, VANILLA_SCSI_TAPE);
279        return 1;
280    }
281    sprintf(command,
282            "%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",
283            cdr_exe);
284    strcpy(tmp, call_program_and_get_last_line_of_output(command));
285    if (strlen(tmp) < 2) {
286        log_it("Could not find tape device");
287        return 1;
288    }
289    sprintf(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' ' -f3 | cut -d')' -f1 | head -n1",
291            cdr_exe);
292    strcpy(tmp, call_program_and_get_last_line_of_output(command));
293    strcpy(dev, VANILLA_SCSI_TAPE);
294    dev[strlen(dev) - 1] = '\0';
295    strcat(dev, tmp);           // e.g. '/dev/st0' becomes '/dev/stN'
296    res = 0;
297    if (!mt_says_tape_exists(dev)) {
298        strcpy(dev, ALT_TAPE);
299        if (!mt_says_tape_exists(dev)) {
300            log_it("Cannot openin %s", dev);
301            strcpy(dev, "/dev/st0");
302            if (!mt_says_tape_exists(dev)) {
303                log_it("Cannot openin %s", dev);
304                strcpy(dev, "/dev/osst0");
305                if (!mt_says_tape_exists(dev)) {
306                    res++;
307                } else {
308                    res = 0;
309                }
310            }
311        }
312    }
313
314    log_it("At this point, dev = %s and res = %d", dev, res);
315
316    strcpy(tmp, call_program_and_get_last_line_of_output("\
317cdrecord -scanbus 2> /dev/null | tr -s '\t' ' ' | \
318grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | \
319awk '{for(i=1; i<NF; i++) { if (index($i, \"GB\")>0) { print $i;};};};'"));
320
321    if (mt_says_tape_exists(dev)) {
322        res = 0;
323    } else {
324        log_it("Turning %s", dev);
325        strcpy(tmp, (strrchr(dev, '/') != NULL) ? strrchr(dev, '/') : dev);
326        sprintf(dev, "/dev/os%s", tmp);
327        log_it("...into %s", dev);
328        if (mt_says_tape_exists(dev)) {
329            res = 0;
330        } else {
331            res++;
332        }
333    }
334
335    siz[0] = '\0';
336    log_it("res=%d; dev=%s", res, dev);
337
338    if (res) {
339        return (res);
340    }
341
342    if (strlen(tmp) < 2) {
343        siz[0] = '\0';
344        log_it("Warning - size of tape unknown");
345        return (0);
346    } else {
347        strcpy(siz, tmp);
348        return (0);
349    }
350}
351
352
353
354
355
356
357int read_EXAT_files_from_tape(long long *ptmp_size, char *tmp_fname,
358                              int *pctrl_chr, char *xattr_fname,
359                              char *acl_fname)
360{
361    int res = 0;
362    char *fname = (char *)&res;                 /* Should NOT be NULL */
363    char *tmp = NULL;
364
365    // xattr
366    if (g_getfattr) {
367        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
368        if (*pctrl_chr != BLK_START_EXAT_FILE) {
369            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
370        }
371        if (strstr(fname, "xattr") == NULL) {
372            mr_asprintf(&tmp,"Wrong order expected xattr, got %s, sunshine.", fname);
373            fatal_error(tmp);
374        }
375        read_file_from_stream_to_file(xattr_fname, *ptmp_size);
376        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
377        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
378            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
379        }
380        log_msg(1, "Got xattr");
381        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
382        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
383            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
384        }
385        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
386        if (*pctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
387            log_msg(1, "No acl attributes found, skipping to afio files");
388            return(0);
389        } else {
390            if (*pctrl_chr != BLK_START_EXTENDED_ATTRIBUTES) {
391                wrong_marker(BLK_START_EXTENDED_ATTRIBUTES, *pctrl_chr);
392            }
393        }
394    }
395    // acl
396    if (g_getfacl) {
397        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
398        if (*pctrl_chr != BLK_START_EXAT_FILE) {
399            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
400        }
401        if (strstr(fname, "acl") == NULL) {
402            mr_asprintf(&tmp,"Wrong order expected acl, got %s, sunshine.", fname);
403            fatal_error(tmp);
404        }
405        read_file_from_stream_to_file(acl_fname, *ptmp_size);
406        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
407        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
408            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
409        }
410        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
411        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
412            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
413        }
414        log_msg(1, "Got acl");
415    }
416    // tarball itself
417    res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
418    log_msg(1, "End of extended attributes, now looking for afioball");
419    return (0);
420}
421
422
423int write_EXAT_files_to_tape(char *xattr_fname,
424                             char *acl_fname)
425{
426    int res = 0;
427    if (g_getfattr) {
428    // xattr
429        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
430                             BLK_START_EXTENDED_ATTRIBUTES);
431        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
432                             BLK_START_EXAT_FILE);
433        write_file_to_stream_from_file(xattr_fname);
434        write_header_block_to_stream((off_t)-1, xattr_fname, BLK_STOP_EXAT_FILE);
435        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
436                             BLK_STOP_EXTENDED_ATTRIBUTES);
437    }
438    if (g_getfacl) {
439    // acl
440        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
441                             BLK_START_EXTENDED_ATTRIBUTES);
442        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
443                             BLK_START_EXAT_FILE);
444        write_file_to_stream_from_file(acl_fname);
445        write_header_block_to_stream((off_t)-1, acl_fname, BLK_STOP_EXAT_FILE);
446        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
447                             BLK_STOP_EXTENDED_ATTRIBUTES);
448    }
449    return (res);
450}
451
452
453
454
455/**
456 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
457 * @param tapeno The tape number to insist on.
458 * @bug There is currently no way to actually verify that the user has actually
459 * inserted the right tape.
460 */
461void insist_on_this_tape_number(int tapeno)
462{
463    int i;
464    char tmp[MAX_STR_LEN];
465
466    log_it("Insisting on tape #%d", tapeno);
467    if (g_current_media_number != tapeno) {
468        //      log_it("g_current_media_number = %d", g_current_media_number);
469        sprintf(tmp,
470                "When the tape drive goes quiet, please insert volume %d in this series.",
471                tapeno);
472        popup_and_OK(tmp);
473        open_evalcall_form("Waiting while the tape drive settles");
474    } else {
475        open_evalcall_form("Waiting while the tape drive rewinds");
476    }
477
478    for (i = 0; i <= 100; i += 2) {
479        usleep(100000);
480        update_evalcall_form(i);
481    }
482    close_evalcall_form();
483    log_it("I assume user has inserted it. They _say_ they have...");
484    g_current_media_number = tapeno;
485
486    //  log_it("g_current_media_number = %d", g_current_media_number);
487    log_it("OK, I've finished insisting. On with the revelry.");
488}
489
490
491
492
493/**
494 * Debugging aid - log the offset we're at on the tape (reading or writing).
495 */
496void log_tape_pos(void)
497{
498    /*@ buffers ***************************************************** */
499
500
501    /*@ end vars *************************************************** */
502
503    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
504           (long) g_tape_posK >> 10);
505}
506
507
508
509
510/**
511 * Add a file to a collection of recently archived filesets/slices.
512 * The type is determined by the filename: if it contains ".afio." it is
513 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
514 * otherwise we generate a fatal_error().
515 * @param td The current @c bkpinfo->tempdir (file will be placed in <tt>td</tt>/tmpfs/backcatalog/).
516 * @param latest_fname The file to place in the collection.
517 * @return 0, always.
518 * @bug Return value is redundant.
519 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
520 */
521int maintain_collection_of_recent_archives(char *td, char *latest_fname)
522{
523    long long final_alleged_writeK, final_projected_certain_writeK,
524        final_actually_certain_writeK = 0, cposK, bufsize_K;
525    int last, curr, i;
526    t_archtype type = other;
527    char command[MAX_STR_LEN];
528    char tmpdir[MAX_STR_LEN];
529    char old_fname[MAX_STR_LEN];
530    char *p;
531    char suffix[16];
532
533    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
534    sprintf(tmpdir, "%s/tmpfs/backcatalog", td);
535    if ((p = strrchr(latest_fname, '.'))) {
536        strcpy(suffix, ++p);
537    } else {
538        suffix[0] = '\0';
539    }
540    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
541        type = fileset;
542    } else if (strstr(latest_fname, "slice")) {
543        type = biggieslice;
544    } else {
545        log_it("fname = %s", latest_fname);
546        fatal_error
547            ("Unknown type. Internal error in maintain_collection_of_recent_archives()");
548    }
549    mkdir(tmpdir, 0x700);
550    sprintf(command, "cp -f %s %s", latest_fname, tmpdir);
551    if (run_program_and_log_output(command, 6)) {
552        log_it("Warning - failed to copy %s to backcatalog at %s",
553               latest_fname, tmpdir);
554    }
555    last = g_tapecatalog->entries - 1;
556    if (last <= 0) {
557        log_it("Too early to start deleting from collection.");
558        return (0);
559    }
560    final_alleged_writeK = g_tapecatalog->el[last].tape_posK;
561    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
562    for (curr = last; curr >= 0; curr--) {
563        cposK = g_tapecatalog->el[curr].tape_posK;
564        if (cposK < final_projected_certain_writeK) {
565            final_actually_certain_writeK = cposK;
566            break;
567        }
568    }
569    if (curr < 0) {
570        log_it("Not far enough into tape to start deleting old archives from collection.");
571        return (0);
572    }
573//  log_it( "There are %lld KB (more than %d KB) in my backcatalog", final_alleged_writeK - final_actually_certain_writeK, bufsize_K);
574
575    for (i = curr - 1; i >= 0 && curr - i < 10; i--) {
576        sprintf(old_fname, "%s/%s", tmpdir, g_tapecatalog->el[i].fname);
577        unlink(old_fname);
578    }
579    return (0);
580}
581
582
583
584
585/**
586 * Open the CD stream for input.
587 * @param bkpinfo The backup information structure. Passed to openin_tape().
588 * @return 0 for success, nonzero for failure.
589 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
590 */
591int openin_cdstream()
592{
593    return (openin_tape());
594}
595
596/**
597 * FIFO used to read/write to the tape device.
598 * @bug This seems obsolete now that we call an external @c buffer program. Please look onto this.
599 */
600char g_tape_fifo[MAX_STR_LEN];
601
602
603
604int set_tape_block_size_with_mt(long internal_tape_block_size)
605{
606    char *tmp;
607    int res;
608
609    if (strncmp(bkpinfo->media_device, "/dev/", 5)) {
610        log_msg(1,
611                "Not using 'mt setblk'. This isn't an actual /dev entry.");
612        return (0);
613    }
614    malloc_string(tmp);
615    sprintf(tmp, "mt -f %s setblk %ld", bkpinfo->media_device, internal_tape_block_size);
616    res = run_program_and_log_output(tmp, 3);
617    paranoid_free(tmp);
618    return (res);
619}
620
621/**
622 * Return the non-rewinding device when passed the normal one
623 * @param tapedev The tape device to open for writing.
624 * @note the caller needs to free the string returned
625 */
626char *get_non_rewind_dev(char *tapedev)
627{
628
629    char *ntapedev = NULL;
630    char *p = NULL;
631    char *q = NULL;
632    char *r = NULL;
633
634    ntapedev = (char *)malloc(strlen(tapedev)+sizeof(char));
635    p = strrchr(tapedev,'/');
636    if (p == NULL) {
637        log_it("Didn't find a '/' in %s",tapedev);
638        return(NULL);
639    }
640
641    /* Copy tapedev content up to the last / */
642    q = tapedev;
643    r = ntapedev;
644    while (q != p) {
645        *r = *q;
646        r++;
647        q++;
648    }
649    /* Copy the '/' */
650    *r = *q;
651    r++;
652    q++;
653    /* Adds a 'n' - non-rewinding */
654    *r = 'n';
655    r++;
656    /* Copy the rest of tapedev */
657    while (*q != '\0') {
658        *r = *q;
659        r++;
660        q++;
661    }
662    *r = '\0';
663    if (mt_says_tape_exists(ntapedev)) {
664        log_it("Non-rewinding tape device is %s",ntapedev);
665    } else {
666        log_it("Unable to find non-rewinding tape device.");
667        ntapedev = NULL;
668    }
669    return(ntapedev);
670}
671
672
673
674/**
675 * Handle OBDR if we were asked to do so
676 * @param tapedev The tape device to open for reading.
677 */
678int skip_obdr(void)
679{
680    char *command = NULL;
681    int res = 0;
682
683    log_it("Skipping OBDR headers");
684    mr_asprintf(&command, "mt -f %s rewind",bkpinfo->media_device);
685    res = run_program_and_log_output(command, 1);
686    paranoid_free(command);
687
688    mr_asprintf(&command, "mt -f %s fsf 2",bkpinfo->media_device);
689    res = run_program_and_log_output(command, 1);
690    paranoid_free(command);
691
692    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
693    return(res);
694}
695
696/**
697 * Handle OBDR if we were asked to do so
698 * @param tapedev The tape device to open for writing.
699 * @return 0 for success, nonzero for failure.
700 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
701 * EXISTING DATA on the tape!
702 */
703int create_obdr(void)
704{
705
706    char *command = NULL;
707    int res = 0;
708
709    log_it("Creating OBDR headers");
710    /* OBDR: First block 10 kB of zero bs = 512 */
711    mr_asprintf(&command, "mt -f %s compression off",bkpinfo->media_device);
712    res = run_program_and_log_output(command, 1);
713    paranoid_free(command);
714
715    mr_asprintf(&command, "mt -f %s rewind",bkpinfo->media_device);
716    res += run_program_and_log_output(command, 1);
717    paranoid_free(command);
718
719    set_tape_block_size_with_mt(512);
720
721    mr_asprintf(&command, "dd if=/dev/zero of=%s bs=512 count=20",bkpinfo->media_device);
722    res += run_program_and_log_output(command, 1);
723    paranoid_free(command);
724
725    /* OBDR: then ISO boot image bs = 2048 */
726    set_tape_block_size_with_mt(2048);
727
728    mr_asprintf(&command, "dd if=%s of=%s bs=2048",MINDI_CACHE"/mondorescue.iso",bkpinfo->media_device);
729    res += run_program_and_log_output(command, 1);
730    paranoid_free(command);
731
732    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
733    return(res);
734}
735
736
737/**
738 * Open the tape device for input.
739 * @param bkpinfo The backup information structure. Fields used:
740 * - @c bkpinfo->media_device
741 * - @c bkpinfo->tmpdir
742 * @return 0 for success, nonzero for failure.
743 * @note This will also work with a cdstream for now, but don't count on this behavior.
744 */
745int openin_tape()
746{
747    /*@ buffer ***************************************************** */
748    char fname[MAX_STR_LEN];
749    char *datablock;
750    char tmp[MAX_STR_LEN];
751    char old_cwd[MAX_STR_LEN];
752    char outfname[MAX_STR_LEN];
753    /*@ int ******************************************************* */
754    int i;
755    int j;
756    int res = 0;
757    long length, templong;
758    size_t k;
759    int retval = 0;
760    int ctrl_chr;
761
762    /*@ long long ************************************************* */
763    long long size;
764
765    /*@ pointers ************************************************** */
766    FILE *fout;
767
768    /*@ end vars *************************************************** */
769
770    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
771    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
772        fatal_error("Cannot alloc mem for tape catalog");
773    }
774    g_tapecatalog->entries = 0;
775    g_tape_posK = 0;
776    if (g_tape_stream) {
777        log_it("FYI - I won't 'openin' the tape. It's already open.");
778        return (0);
779    }
780
781    // mondoarchive should have configured everything to give the right non-rew device
782    if ((bkpinfo->use_obdr) && (bkpinfo->media_device != NULL)) {
783        res = skip_obdr();
784        if (res != 0) {
785            log_it("Not able to skip OBDR - Restore will have to be done manually");
786        }
787    } else {
788        if (bkpinfo->media_device == NULL) {
789            log_it("Not able to skip OBDR - Restore will have to be done manually");
790        }
791        set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
792    }
793
794    insist_on_this_tape_number(1);
795    sprintf(outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
796    make_hole_for_file(outfname);
797
798//  start_buffer_process( bkpinfo->media_device, g_tape_fifo, FALSE);
799    log_it("Opening IN tape");
800    if (!
801        (g_tape_stream =
802         open_device_via_buffer(bkpinfo->media_device, 'r',
803                                bkpinfo->internal_tape_block_size))) {
804        log_OS_error(g_tape_fifo);
805        log_to_screen("Cannot openin stream device");
806        return (1);
807    }
808    log_to_screen("Reading stream");
809    log_it("stream device = '%s'", bkpinfo->media_device);
810/* skip data disks */
811    open_evalcall_form("Skipping data disks on stream");
812    log_to_screen("Skipping data disks on stream");
813    if (!(fout = fopen(outfname, "w"))) {
814        log_OS_error(outfname);
815        log_to_screen("Cannot openout datadisk all.tar.gz file");
816        return (-1);
817    }
818    if (!(datablock = (char *) malloc(256 * 1024))) {
819        log_to_screen("Unable to malloc 256*1024");
820        exit(1);
821    }
822    for (i = 0; i < 32; i++) {
823        for (j = 0; j < 4; j++) {
824            for (length = 0, k = 0; length < 256 * 1024; length += k) {
825                k = fread(datablock + length, 1, 256 * 1024 - length,
826                          g_tape_stream);
827            }
828            (void) fwrite(datablock, 1, (size_t) length, fout);
829            g_tape_posK += length / 1024;
830        }
831        if (i > 8)              // otherwise, 'buffer' distorts calculations
832        {
833            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
834            update_evalcall_form((int) (templong));
835        }
836    }
837    paranoid_fclose(fout);
838    paranoid_free(datablock);
839/* find initial blocks */
840    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
841    retval += res;
842    if (ctrl_chr != BLK_START_OF_TAPE) {
843        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
844    }
845    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
846    retval += res;
847    if (ctrl_chr != BLK_START_OF_BACKUP) {
848        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
849    }
850    close_evalcall_form();
851    log_it("Saved all.tar.gz to '%s'", outfname);
852    (void) getcwd(old_cwd, MAX_STR_LEN);
853    chdir(bkpinfo->tmpdir);
854    sprintf(tmp, "tar -zxf %s ./tmp/mondo-restore.cfg 2> /dev/null",
855            outfname);
856    paranoid_system(tmp);
857    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
858    chdir(old_cwd);
859    unlink(outfname);
860    return (retval);
861}
862
863
864/**
865 * Start writing to a CD stream.
866 * @param cddev The CD device to openout via cdrecord.
867 * @param speed The speed to write at.
868 * @return 0 for success, nonzero for failure.
869 * @note This should be called only from backup processes.
870 */
871int openout_cdstream(char *cddev, int speed)
872{
873    /*@ buffers ***************************************************** */
874    char command[MAX_STR_LEN * 2];
875
876    /*@ end vars *************************************************** */
877
878/*  add 'dummy' if testing */
879    sprintf(command,
880            "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
881            cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
882/*  initialise the catalog */
883    g_current_media_number = 1;
884    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
885        fatal_error("Cannot alloc mem for tape catalog");
886    }
887    g_tapecatalog->entries = 0;
888/* log stuff */
889    log_it("Opening OUT cdstream with the command");
890    log_it(command);
891/*  log_it("Let's see what happens, shall we?"); */
892    g_tape_stream = popen(command, "w");
893    if (g_tape_stream) {
894        return (0);
895    } else {
896        log_to_screen("Failed to openout to cdstream (fifo)");
897        return (1);
898    }
899}
900
901/**
902 * Start writing to a tape device for the backup.
903 * Handle OBDR if we were asked to do so
904 * @param tapedev The tape device to open for writing.
905 * @return 0 for success, nonzero for failure.
906 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
907 * EXISTING DATA on the tape!
908 */
909int openout_tape() {
910
911g_current_media_number = 1;
912if (g_tape_stream) {
913    log_it("FYI - I won't 'openout' the tape. It's already open.");
914    return (0);
915}
916if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
917    fatal_error("Cannot alloc mem for tape catalog");
918}
919g_tapecatalog->entries = 0;
920g_tape_posK = 0;
921
922if (bkpinfo->use_obdr) {
923    create_obdr();
924} else {
925    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
926}
927log_it("Opening OUT tape");
928if (!
929    (g_tape_stream =
930     open_device_via_buffer(bkpinfo->media_device, 'w', bkpinfo->internal_tape_block_size))) {
931    log_OS_error(g_tape_fifo);
932    log_to_screen("Cannot openin stream device");
933    return (1);
934}
935return (0);
936}
937
938
939
940
941/**
942 * Copy a file from the opened stream (CD or tape) to @p outfile.
943 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
944 * @param outfile The file to write to.
945 * @param size The size of the file in the input stream.
946 * @return 0 for success, nonzero for failure.
947 */
948int
949read_file_from_stream_to_file(char *outfile, long long size)
950{
951
952    /*@ int ******************************************************** */
953    int res;
954
955    /*@ end vars *************************************************** */
956
957    res = read_file_from_stream_FULL(outfile, NULL, size);
958
959    return (res);
960}
961
962
963
964/**
965 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
966 * by @p fout.
967 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
968 * @param fout The stream to write the file to.
969 * @param size The size of the file in bytes.
970 * @return 0 for success, nonzero for failure.
971 */
972int
973read_file_from_stream_to_stream(FILE * fout, long long size)
974{
975
976    /*@ int ******************************************************** */
977    int res;
978
979    /*@ end vars *************************************************** */
980
981    res = read_file_from_stream_FULL(NULL, fout, size);
982/*  fflush(g_tape_stream);
983  fflush(fout);*/
984    return (res);
985}
986
987
988
989/**
990 * Copy a file from the currently opened stream (CD or tape) to either a
991 * @c FILE pointer indicating a currently-opened file, or a filename indicating
992 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
993 * and read_file_from_stream_to_stream() are wrappers for.
994 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
995 * @param outfname If non-NULL, write to this file.
996 * @param foutstream If non-NULL, write to this stream.
997 * @param orig_size The original length of the file in bytes.
998 * @return 0 for success, nonzero for failure.
999 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
1000 */
1001int
1002read_file_from_stream_FULL(char *outfname, FILE * foutstream, long long orig_size)
1003{
1004    /*@ buffers ***************************************************** */
1005    char *tmp;
1006    char *datablock;
1007    char *temp_fname;
1008    char *temp_cksum;
1009    char *actual_cksum;
1010//  char *pA, *pB;
1011
1012    /*@ int ********************************************************* */
1013    int retval = 0;
1014#ifdef EXTRA_TAPE_CHECKSUMS
1015    int i, ch;
1016#endif
1017    int noof_blocks;
1018    int ctrl_chr;
1019    int res;
1020    /*@ pointers **************************************************** */
1021    FILE *fout;
1022
1023    /*@ long    ***************************************************** */
1024    long bytes_to_write = 0L /*,i */ ;
1025//  long bytes_successfully_read_in_this_time = 0;
1026
1027    /*@ long long *************************************************** */
1028    long long temp_size, size;
1029    long bytes_read, bytes_to_read;
1030    long long total_read_from_tape_for_this_file = 0;
1031    long long where_I_was_before_tape_change = 0;
1032    /*@ unsigned int ************************************************ */
1033    /*  unsigned int ch; */
1034    unsigned int crc16;
1035    unsigned int crctt;
1036
1037    bool had_to_resync = FALSE;
1038
1039    /*@ init  ******************************************************* */
1040    malloc_string(tmp);
1041    malloc_string(temp_fname);
1042    malloc_string(temp_cksum);
1043    malloc_string(actual_cksum);
1044    datablock = malloc(TAPE_BLOCK_SIZE);
1045    crc16 = 0;
1046    crctt = 0;
1047    size = orig_size;
1048
1049    /*@ end vars *************************************************** */
1050
1051    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1052    if (orig_size != temp_size && orig_size != -1) {
1053        sprintf(tmp,
1054                "output file's size should be %ld K but is apparently %ld K",
1055                (long) size >> 10, (long) temp_size >> 10);
1056        log_to_screen(tmp);
1057    }
1058    if (ctrl_chr != BLK_START_FILE) {
1059        wrong_marker(BLK_START_FILE, ctrl_chr);
1060        return (1);
1061    }
1062    /* Not used
1063    sprintf(tmp, "Reading file from tape; writing to '%s'; %ld KB",
1064            outfname, (long) size >> 10);
1065            */
1066
1067    if (foutstream) {
1068        fout = foutstream;
1069    } else {
1070        fout = fopen(outfname, "w");
1071    }
1072    if (!fout) {
1073        log_OS_error(outfname);
1074        log_to_screen("Cannot openout file");
1075        return (1);
1076    }
1077    total_read_from_tape_for_this_file = 0;
1078    for (noof_blocks = 0; size > 0;
1079         noof_blocks++, size -=
1080         bytes_to_write, total_read_from_tape_for_this_file +=
1081         bytes_read) {
1082        bytes_to_write =
1083            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1084        bytes_to_read = TAPE_BLOCK_SIZE;
1085        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1086        while (bytes_read < bytes_to_read) {    // next tape!
1087//    crctt=crc16=0;
1088            where_I_was_before_tape_change = size;
1089            log_msg(4, "where_I_was_... = %lld",
1090                    where_I_was_before_tape_change);
1091            start_to_read_from_next_tape();
1092            log_msg(4, "Started reading from next tape.");
1093            skip_incoming_files_until_we_find_this_one(temp_fname);
1094            log_msg(4, "Skipped irrelevant files OK.");
1095            for (size = orig_size; size > where_I_was_before_tape_change;
1096                 size -= bytes_to_write) {
1097                bytes_read =
1098                    fread(datablock, 1, bytes_to_read, g_tape_stream);
1099            }
1100            log_msg(4, "'size' is now %lld (should be %lld)", size,
1101                    where_I_was_before_tape_change);
1102            log_to_screen("Successfully re-sync'd tape");
1103            had_to_resync = TRUE;
1104            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1105        }
1106
1107        (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
1108
1109#ifdef EXTRA_TAPE_CHECKSUMS
1110        for (i = 0; i < (int) bytes_to_write; i++) {
1111            ch = datablock[i];
1112            crc16 = updcrcr(crc16, (unsigned) ch);
1113            crctt = updcrc(crctt, (unsigned) ch);
1114        }
1115#endif
1116    }
1117    log_msg(6, "Total read from tape for this file = %lld",
1118            total_read_from_tape_for_this_file);
1119    log_msg(6, ".......................... Should be %lld", orig_size);
1120    g_tape_posK += total_read_from_tape_for_this_file / 1024;
1121    sprintf(actual_cksum, "%04x%04x", crc16, crctt);
1122    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
1123    } else {
1124        paranoid_fclose(fout);
1125    }
1126    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
1127    if (ctrl_chr != BLK_STOP_FILE) {
1128        wrong_marker(BLK_STOP_FILE, ctrl_chr);
1129//      fatal_error("Bad marker"); // return(1);
1130    }
1131    if (strcmp(temp_cksum, actual_cksum)) {
1132        sprintf(tmp, "actual cksum=%s; recorded cksum=%s", actual_cksum,
1133                temp_cksum);
1134        log_to_screen(tmp);
1135        sprintf(tmp, "%s (%ld K) is corrupt on tape", temp_fname,
1136                (long) orig_size >> 10);
1137        log_to_screen(tmp);
1138        retval++;
1139    } else {
1140        sprintf(tmp, "%s is GOOD on tape", temp_fname);
1141        /*      log_it(tmp); */
1142    }
1143    paranoid_free(datablock);
1144    paranoid_free(tmp);
1145    paranoid_free(temp_fname);
1146    paranoid_free(temp_cksum);
1147    paranoid_free(actual_cksum);
1148    return (retval);
1149}
1150
1151
1152
1153/**
1154 * Read a header block from the currently opened stream (CD or tape).
1155 * This block indicates the length of the following file (if it's file-related)
1156 * the filename (if it's file-related), and the block type.
1157 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
1158 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
1159 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
1160 * @return 0 for success, nonzero for failure.
1161 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
1162 */
1163int
1164read_header_block_from_stream(long long *plen, char *filename,
1165                              int *pcontrol_char)
1166{
1167
1168    /*@ buffers ***************************************************** */
1169    char *tempblock;
1170
1171    /*@ int ********************************************************* */
1172    int i, retval;
1173
1174    /*@ end vars *************************************************** */
1175
1176    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
1177
1178    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1179        tempblock[i] = 0;
1180    }
1181    while (!(*pcontrol_char = tempblock[7000])) {
1182        g_tape_posK +=
1183            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1184                  g_tape_stream) / 1024;
1185    }
1186/*  memcpy((char*)plength_of_incoming_file,(char*)tempblock+7001,sizeof(long long)); */
1187/*  for(*plen=0,i=7;i>=0;i--) {*plen<<=8; *plen |= tempblock[7001+i];} */
1188    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1189    if (strcmp(tempblock + 6000 + *pcontrol_char, STR_HEADER)) {
1190        log_it("Bad header block at %ld K", (long) g_tape_posK);
1191    }
1192    strcpy(filename, tempblock + 1000);
1193/*  strcpy(cksum,tempblock+5555);*/
1194/*  log_it( "%s  (reading) fname=%s, filesize=%ld K",
1195       marker_to_string (*pcontrol_char), filename,
1196       (long) ((*plen) >> 10));
1197*/
1198    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1199        log_to_screen("I can't verify an aborted backup.");
1200        retval = 1;
1201    } else {
1202        retval = 0;
1203    }
1204    for (i = 1000; i < 1020; i++) {
1205        if (tempblock[i] < 32 || tempblock[i] > 126) {
1206            tempblock[i] = ' ';
1207        }
1208    }
1209    tempblock[i] = '\0';
1210    log_msg(6, "%s (fname=%s, size=%ld K)",
1211            marker_to_string(*pcontrol_char), tempblock + 1000,
1212            (long) (*plen) >> 10);
1213    paranoid_free(tempblock);
1214    return (retval);
1215}
1216
1217
1218
1219/**
1220 * Add specified file/slice to the internal catalog of all archives written.
1221 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1222 * write the last [buffer size] MB from the catalog to the new tape, so we know
1223 * we have @e all archives on some CD/tape/whatever.
1224 * @param type The type of file we're cataloging (afioball, slice, something else)
1225 * @param number The fileset number or biggiefile number.
1226 * @param aux The slice number if it's a biggiefile, or any other additional info.
1227 * @param fn The original full pathname of the file we're recording.
1228 * @return The index of the record we just added.
1229 */
1230int register_in_tape_catalog(t_archtype type, int number, long aux,
1231                             char *fn)
1232{
1233    int last;
1234    char fname[MAX_TAPECAT_FNAME_LEN+1];
1235    char *p;
1236
1237    p = strrchr(fn, '/');
1238    if (p) {
1239        p++;
1240    } else {
1241        p = fn;
1242    }
1243    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1244    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1245    last = g_tapecatalog->entries;
1246    if (last >= MAX_TAPECATALOG_ENTRIES) {
1247        log_it
1248            ("Warning - can't log #%d in tape catalog - too many entries already",
1249             number);
1250        return (-1);
1251    }
1252    g_tapecatalog->el[last].type = type;
1253    g_tapecatalog->el[last].number = number;
1254    g_tapecatalog->el[last].aux = aux;
1255    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1256    strcpy(g_tapecatalog->el[last].fname, fname);
1257    g_tapecatalog->entries++;
1258    return (last);              // returns the index of the record we've jsut added
1259}
1260
1261
1262
1263
1264/**
1265 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1266 * (got SIGPIPE) or look like we will.
1267 * @param mediasize The size of the tape in megabytes.
1268 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1269 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1270 * autodetecting the size. Huh?
1271 */
1272
1273/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1274bool
1275should_we_write_to_next_tape(long mediasize,
1276                             off_t length_of_incoming_file)
1277{
1278    /*@ bool's ***************************************************** */
1279    bool we_need_a_new_tape = FALSE;
1280
1281    /*@ end vars *************************************************** */
1282
1283    if (mediasize == 0) {
1284        return (FALSE);
1285    }
1286    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1287        log_it("mediasize = %ld", mediasize);
1288        we_need_a_new_tape = TRUE;
1289        log_to_screen("Should have started a new tape/CD already");
1290    }
1291    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1292        mediasize - (SLICE_SIZE * 4 / 1024)) {
1293        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1294               mediasize);
1295        we_need_a_new_tape = TRUE;
1296    }
1297    return (we_need_a_new_tape);
1298}
1299
1300
1301/**
1302 * Seek through the stream until we find a header block where the NAME field matches
1303 * @p the_file_I_was_reading. This is useful if you've just started reading from
1304 * a new tape and want to find the file you were reading when the tape ended.
1305 * @param the_file_I_was_reading File name to look for.
1306 * @return 0 for success, nonzero for failure.
1307 */
1308int skip_incoming_files_until_we_find_this_one(char
1309                                               *the_file_I_was_reading)
1310{
1311    char *pA;
1312    char *pB;
1313    int res;
1314    int ctrl_chr;
1315    char *temp_fname;
1316    char *datablock;
1317    long long temp_size, size;
1318    long bytes_to_write;
1319
1320    datablock = malloc(TAPE_BLOCK_SIZE);
1321    malloc_string(temp_fname);
1322    pB = strrchr(the_file_I_was_reading, '/');
1323    if (pB) {
1324        pB++;
1325    } else {
1326        pB = the_file_I_was_reading;
1327    }
1328    log_msg(1, "skip_incoming_..(%s)", pB);
1329    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1330    ctrl_chr = -1;
1331    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1332        res =
1333            read_header_block_from_stream(&temp_size, temp_fname,
1334                                          &ctrl_chr);
1335        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1336            break;
1337        }
1338        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1339        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1340        log_msg(3, "Still trying to re-sync w/ tape");
1341    }
1342    while (ctrl_chr != BLK_START_FILE) {
1343        res =
1344            read_header_block_from_stream(&temp_size, temp_fname,
1345                                          &ctrl_chr);
1346        if (ctrl_chr == BLK_START_FILE) {
1347            break;
1348        }
1349        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1350        wrong_marker(BLK_START_FILE, ctrl_chr);
1351        log_msg(3, "Still trying to re-sync w/ tape");
1352    }
1353    pA = strrchr(temp_fname, '/');
1354    if (pA) {
1355        pA++;
1356    } else {
1357        pA = temp_fname;
1358    }
1359    pB = strrchr(the_file_I_was_reading, '/');
1360    if (pB) {
1361        pB++;
1362    } else {
1363        pB = the_file_I_was_reading;
1364    }
1365    while (strcmp(pA, pB)) {
1366        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1367                the_file_I_was_reading);
1368        for (size = temp_size; size > 0; size -= bytes_to_write) {
1369            bytes_to_write =
1370                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1371            // FIXME - needs error-checking and -catching
1372            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1373        }
1374        res =
1375            read_header_block_from_stream(&temp_size, temp_fname,
1376                                          &ctrl_chr);
1377        if (ctrl_chr != BLK_STOP_FILE) {
1378            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1379        }
1380        res =
1381            read_header_block_from_stream(&temp_size, temp_fname,
1382                                          &ctrl_chr);
1383        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1384            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1385        }
1386        res =
1387            read_header_block_from_stream(&temp_size, temp_fname,
1388                                          &ctrl_chr);
1389        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1390            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1391        }
1392        res =
1393            read_header_block_from_stream(&temp_size, temp_fname,
1394                                          &ctrl_chr);
1395        if (ctrl_chr != BLK_START_FILE) {
1396            wrong_marker(BLK_START_FILE, ctrl_chr);
1397        }
1398        pA = strrchr(temp_fname, '/');
1399        if (pA) {
1400            pA++;
1401        } else {
1402            pA = temp_fname;
1403        }
1404        pB = strrchr(the_file_I_was_reading, '/');
1405        if (pB) {
1406            pB++;
1407        } else {
1408            pB = the_file_I_was_reading;
1409        }
1410    }
1411    log_msg(2, "Reading %s (it matches %s)", temp_fname,
1412            the_file_I_was_reading);
1413    paranoid_free(temp_fname);
1414    paranoid_free(datablock);
1415    return (0);
1416}
1417
1418
1419/**
1420 * Start to read from the next tape. Assumes the user has already inserted it.
1421 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1422 * @return 0 for success, nonzero for failure.
1423 */
1424int start_to_read_from_next_tape()
1425{
1426    /*@ int ********************************************************* */
1427    int res = 0;
1428    char *sz_msg;
1429    int ctrlchr;
1430    long long temp_size;
1431    malloc_string(sz_msg);
1432    /*@ end vars *************************************************** */
1433
1434    paranoid_pclose(g_tape_stream);
1435    sync();
1436    sync();
1437    sync();
1438    log_it("Next tape requested.");
1439    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1440    log_it("Opening IN the next tape");
1441    if (!
1442        (g_tape_stream =
1443         open_device_via_buffer(bkpinfo->media_device, 'r',
1444                                bkpinfo->internal_tape_block_size))) {
1445        log_OS_error(g_tape_fifo);
1446        log_to_screen("Cannot openin stream device");
1447        return (1);
1448    }
1449    g_tape_posK = 0;
1450    g_sigpipe = FALSE;
1451    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1452    if (ctrlchr != BLK_START_OF_TAPE) {
1453        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1454    }
1455    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1456    if (ctrlchr != BLK_START_OF_BACKUP) {
1457        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1458    } else {
1459        log_msg(3, "Next tape opened OK. Whoopee!");
1460    }
1461    paranoid_free(sz_msg);
1462    return (res);
1463}
1464
1465
1466
1467/**
1468 * Start to write to the next tape. Assume the user has already inserted it.
1469 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1470 * @return 0 for success, nonzero for failure.
1471 */
1472int start_to_write_to_next_tape()
1473{
1474    int res = 0;
1475    char command[MAX_STR_LEN * 2];
1476    paranoid_pclose(g_tape_stream);
1477    system("sync");
1478    system("sync");
1479    system("sync");
1480    log_it("New tape requested.");
1481    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1482    if (g_current_media_number > MAX_NOOF_MEDIA) {
1483        res++;
1484        log_to_screen("Too many tapes. Man, you need to use nfs!");
1485    }
1486    if (bkpinfo->backup_media_type == cdstream) {
1487        sprintf(command,
1488                "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1489                bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE,
1490                MONDO_LOGFILE);
1491        log_it("Opening OUT to next CD with the command");
1492        log_it(command);
1493        log_it("Let's see what happens, shall we?");
1494        g_tape_stream = popen(command, "w");
1495        if (!g_tape_stream) {
1496            log_to_screen("Failed to openout to cdstream (fifo)");
1497            return (1);
1498        }
1499    } else {
1500        log_it("Opening OUT to next tape");
1501        if (!
1502            (g_tape_stream =
1503             open_device_via_buffer(bkpinfo->media_device, 'w',
1504                                    bkpinfo->internal_tape_block_size))) {
1505            log_OS_error(g_tape_fifo);
1506            log_to_screen("Cannot openin stream device");
1507            return (1);
1508        }
1509    }
1510    g_tape_posK = 0;
1511    g_sigpipe = FALSE;
1512    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1513    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1514    return (res);
1515}
1516
1517
1518
1519
1520/**
1521 * Write a bufferfull of the most recent archives to the tape. The
1522 * rationale behind this is a bit complex. If the previous tape ended
1523 * suddenly (EOF or otherwise) some archives were probably left in the
1524 * buffer. That means that Mondo thinks they have been written, but
1525 * the external binary @c buffer has not actually written them. So to
1526 * be safe, we start the new tape by writing the last bufferfull from
1527 * the old one. This insures that all archives will be on at least
1528 * one tape. Sounds inelegant, but it works.
1529 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1530 * @return 0 for success, nonzero for failure.
1531 */
1532int write_backcatalog_to_tape()
1533{
1534    int i, last, res = 0;
1535    char *fname;
1536
1537    log_msg(2, "I am now writing back catalog to tape");
1538    malloc_string(fname);
1539    last = g_tapecatalog->entries - 1;
1540    for (i = 0; i <= last; i++) {
1541        sprintf(fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir,
1542                g_tapecatalog->el[i].fname);
1543        if (!does_file_exist(fname)) {
1544            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1545        } else {
1546            write_header_block_to_stream(length_of_file(fname),
1547                                         "start-backcatalog-afio-or-slice",
1548                                         BLK_START_AN_AFIO_OR_SLICE);
1549            log_msg(2, "Writing %s", fname);
1550            if (write_file_to_stream_from_file(fname)) {
1551                res++;
1552                log_msg(2, "%s failed", fname);
1553            }
1554            if (i != last) {
1555                write_header_block_to_stream((off_t)0,
1556                                             "stop-backcatalog-afio-or-slice",
1557                                             BLK_STOP_AN_AFIO_OR_SLICE);
1558            }
1559        }
1560    }
1561    paranoid_free(fname);
1562    log_msg(2, "Finished writing back catalog to tape");
1563    return (res);
1564}
1565
1566
1567
1568/**
1569 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1570 * @param fname The path to all.tar.gz.
1571 * @return 0 for success, nonzero for failure.
1572 */
1573int write_data_disks_to_stream(char *fname)
1574{
1575    /*@ pointers *************************************************** */
1576    FILE *fin;
1577    char tmp[MAX_STR_LEN];
1578
1579    /*@ long ******************************************************* */
1580    long m = -1;
1581    long templong;
1582
1583    /*@ int ******************************************************** */
1584    int i, j;
1585
1586    /*@ buffers **************************************************** */
1587    char tempblock[256 * 1024];
1588
1589    /*@ end vars *************************************************** */
1590
1591    open_evalcall_form("Writing data disks to tape");
1592    log_to_screen("Writing data disks to tape");
1593    log_it("Data disks = %s", fname);
1594    if (!does_file_exist(fname)) {
1595        sprintf(tmp, "Cannot find %s", fname);
1596        log_to_screen(tmp);
1597        return (1);
1598    }
1599    if (!(fin = fopen(fname, "r"))) {
1600        log_OS_error(fname);
1601        fatal_error("Cannot openin the data disk");
1602    }
1603    for (i = 0; i < 32; i++) {  /* 32MB */
1604        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1605            if (!feof(fin)) {
1606                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1607            } else {
1608                m = 0;
1609            }
1610            for (; m < 256 * 1024; m++) {
1611                tempblock[m] = '\0';
1612            }
1613            g_tape_posK +=
1614                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1615        }
1616        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1617        {
1618            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1619            update_evalcall_form((int) (templong));
1620        }
1621    }
1622    paranoid_fclose(fin);
1623    close_evalcall_form();
1624    return (0);
1625}
1626
1627
1628
1629
1630/**
1631 * Copy @p infile to the opened stream (CD or tape).
1632 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1633 * @param infile The file to write to the stream.
1634 * @return 0 for success, nonzero for failure.
1635 */
1636int write_file_to_stream_from_file(char *infile)
1637{
1638    /*@ buffers **************************************************** */
1639    char tmp[MAX_STR_LEN];
1640    char datablock[TAPE_BLOCK_SIZE];
1641    char checksum[MAX_STR_LEN];
1642    char *infile_basename;
1643
1644    /*@ int ******************************************************** */
1645    int retval = 0;
1646    int noof_blocks;
1647
1648    /*  unsigned int ch; */
1649    unsigned int crc16;
1650    unsigned int crctt;
1651
1652    /*@ pointers *************************************************** */
1653    FILE *fin;
1654    char *p;
1655
1656    /*@ long ******************************************************* */
1657    long bytes_to_read = 0;
1658    long i;
1659
1660    off_t filesize;
1661
1662#ifdef EXTRA_TAPE_CHECKSUMS
1663    int ch;
1664#endif
1665
1666    /*@ initialize ************************************************ */
1667    crc16 = 0;
1668    crctt = 0;
1669
1670
1671
1672    /*@ end vars *************************************************** */
1673
1674    infile_basename = strrchr(infile, '/');
1675    if (infile_basename) {
1676        infile_basename++;
1677    } else {
1678        infile_basename = infile;
1679    }
1680    filesize = length_of_file(infile);
1681    if (should_we_write_to_next_tape
1682        (bkpinfo->media_size[g_current_media_number], filesize)) {
1683        start_to_write_to_next_tape();
1684        write_backcatalog_to_tape();
1685    }
1686    p = strrchr(infile, '/');
1687    if (!p) {
1688        p = infile;
1689    } else {
1690        p++;
1691    }
1692    sprintf(tmp, "Writing file '%s' to tape (%ld KB)", p,
1693            (long) filesize >> 10);
1694    log_it(tmp);
1695    write_header_block_to_stream(filesize, infile_basename,
1696                                 BLK_START_FILE);
1697//go_here_to_restart_saving_of_file:
1698    if (!(fin = fopen(infile, "r"))) {
1699        log_OS_error(infile);
1700        return (1);
1701    }
1702    for (noof_blocks = 0; filesize > 0;
1703         noof_blocks++, filesize -= bytes_to_read) {
1704        if (filesize < TAPE_BLOCK_SIZE) {
1705            bytes_to_read = (long) filesize;
1706            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1707                datablock[i] = '\0';
1708            }
1709        } else {
1710            bytes_to_read = TAPE_BLOCK_SIZE;
1711        }
1712        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1713        g_tape_posK +=
1714            fwrite(datablock, 1, /*bytes_to_read */ 
1715                   (size_t) TAPE_BLOCK_SIZE,
1716                   g_tape_stream) / 1024;
1717        if (g_sigpipe) {
1718            log_it("Sigpipe occurred recently. I'll start a new tape.");
1719            fclose(fin);
1720            g_sigpipe = FALSE;
1721            start_to_write_to_next_tape();
1722            write_backcatalog_to_tape();    // kinda-sorta recursive :)
1723            return (0);
1724        }
1725#ifdef EXTRA_TAPE_CHECKSUMS
1726        for (i = 0; i < bytes_to_read; i++) {
1727            ch = datablock[i];
1728            crc16 = updcrcr(crc16, (unsigned) ch);
1729            crctt = updcrc(crctt, (unsigned) ch);
1730        }
1731#endif
1732    }
1733    paranoid_fclose(fin);
1734    sprintf(checksum, "%04x%04x", crc16, crctt);
1735    /* BERLIOS: what does it do ??? */
1736    write_header_block_to_stream((off_t)g_current_media_number, checksum,
1737                                 BLK_STOP_FILE);
1738//  log_it("File '%s' written to tape.", infile);
1739    return (retval);
1740}
1741
1742
1743
1744
1745
1746/**
1747 * Write a header block to the opened stream (CD or tape).
1748 * @param length_of_incoming_file The length to store in the header block.
1749 * Usually matters only if this is a file-related header, in which case it should
1750 * be the length of the file that will follow.
1751 * @param filename The filename to store in the header block. Usually matters
1752 * only if this is a file-related header, in which case this should be the name
1753 * if the file that will follow.
1754 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1755 * @return 0 for success, nonzero for failure.
1756 */
1757int
1758write_header_block_to_stream(off_t length_of_incoming_file,
1759                             char *filename, int control_char)
1760{
1761    /*@ buffers **************************************************** */
1762    char tempblock[TAPE_BLOCK_SIZE];
1763    char tmp[MAX_STR_LEN];
1764    char *p;
1765
1766    /*@ int ******************************************************** */
1767    int i;
1768
1769    off_t olen;
1770
1771    /*@ end vars *************************************************** */
1772
1773
1774    olen = length_of_incoming_file;
1775    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1776    if (!p) {
1777        p = filename;
1778    } else {
1779        p++;
1780    }
1781    if (!g_tape_stream) {
1782        log_to_screen
1783            ("You're not backing up to tape. Why write a tape header?");
1784        return (1);
1785    }
1786    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1787        tempblock[i] = 0;
1788    }
1789    sprintf(tempblock + 6000 + control_char, STR_HEADER);
1790    tempblock[7000] = control_char;
1791/*  for(i=0;i<8;i++) {tempblock[7001+i]=olen&0xff; olen>>=8;} */
1792    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1793/*  if (length_of_incoming_file) {memcpy(tempblock+7001,(char*)&length_of_incoming_file,sizeof(long long));} */
1794    strcpy(tempblock + 1000, filename);
1795/*  strcpy(tempblock+5555,cksum); */
1796    g_tape_posK +=
1797        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1798               g_tape_stream) / 1024;
1799    sprintf(tmp, "%s (fname=%s, size=%ld K)",
1800            marker_to_string(control_char), p,
1801            (long) length_of_incoming_file >> 10);
1802    log_msg(6, tmp);
1803/*  log_tape_pos(); */
1804    return (0);
1805}
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816/**
1817 * Log (to screen) an erroneous marker, along with what it should have been.
1818 * @param should_be What we were expecting.
1819 * @param it_is What we got.
1820 */
1821void wrong_marker(int should_be, int it_is)
1822{
1823    /*@ buffer ***************************************************** */
1824    char tmp[MAX_STR_LEN];
1825
1826
1827    /*@ end vars *************************************************** */
1828    sprintf(tmp, "Wrong marker! (Should be %s, ",
1829            marker_to_string(should_be));
1830    sprintf(tmp + strlen(tmp), "is actually %s)", marker_to_string(it_is));
1831    log_to_screen(tmp);
1832}
1833
1834/* @} - end of streamGroup */
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