source: branches/stable/mondo/src/common/libmondo-stream.c @ 1116

Last change on this file since 1116 was 1116, checked in by bruno, 13 years ago

Suppress lib-common-externs.h useless

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1/* libmondo-stream.c
2   $Id: libmondo-stream.c 1116 2007-02-09 00:02:11Z 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 "libmondo-stream.h"
19#include "libmondo-string-EXT.h"
20#include "libmondo-files-EXT.h"
21#include "libmondo-gui-EXT.h"
22#include "libmondo-fork-EXT.h"
23#include "libmondo-tools-EXT.h"
24#include "libmondo-fifo-EXT.h"
25
26#define EXTRA_TAPE_CHECKSUMS
27
28/*@unused@*/
29//static char cvsid[] = "$Id: libmondo-stream.c 1116 2007-02-09 00:02:11Z bruno $";
30extern bool g_sigpipe;
31extern int g_tape_buffer_size_MB;
32
33extern char *g_getfacl;
34extern char *g_getfattr;
35
36/**
37 * @addtogroup globalGroup
38 * @{
39 */
40/**
41 * The file pointer for the opened tape/CD stream.
42 * Opened and closed by openin_tape(), openin_cdstream(),
43 * openout_tape(), openout_cdstream(), closein_tape(), closein_cdstream(),
44 * closeout_tape(), and closeout_cdstream().
45 */
46FILE *g_tape_stream = NULL;
47
48
49/**
50 * The position (in kilobytes) where we are on the tape.
51 */
52long long g_tape_posK = 0;
53
54/**
55 * The current media number we're using. This value is 1-based.
56 */
57int g_current_media_number = -1;
58
59/**
60 * The tape catalog that keeps track of files written to tape.
61 */
62struct s_tapecatalog *g_tapecatalog;
63
64/* @} - end of globalGroup */
65
66int write_backcatalog_to_tape(struct s_bkpinfo *bkpinfo);
67
68
69
70
71
72/**
73 * @addtogroup streamGroup
74 * @{
75 */
76/**
77 * Close the global output file descriptor which Mondo has used to read
78 * from the CD stream.
79 * @param bkpinfo The backup information structure. Passed directly to closein_tape().
80 * @return 0 for success, nonzero for failure.
81 * @note This should be called by restore processes only.
82 */
83int closein_cdstream(struct s_bkpinfo *bkpinfo)
84{
85    return (closein_tape(bkpinfo));
86}
87
88
89/**
90 * Close the global output file descriptor which Mondo has used to read
91 * from buffer or dd, which read from the tape.
92 * @param bkpinfo The backup information structure. Unused.
93 * @return 0 for success, nonzero for failure.
94 * @note This should be called by restore processes only.
95 * @note This function also works for cdstreams for now, but don't count on this behavior.
96 * @bug @p bkpinfo parameter is unused.
97 */
98int closein_tape(struct s_bkpinfo *bkpinfo)
99{
100    /*@ int's ******************************************************* */
101    int retval = 0;
102    int res = 0;
103    int ctrl_chr = '\0';
104
105    /*@ buffers ***************************************************** */
106    char fname[MAX_STR_LEN];
107
108    /*@ long long's ************************************************* */
109    long long size;
110    char *blk;
111    int i;
112
113    blk = (char *) mr_malloc(256 * 1024);
114
115    log_it("closein_tape() -- entering");
116    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
117    retval += res;
118    if (ctrl_chr != BLK_END_OF_BACKUP) {
119        wrong_marker(BLK_END_OF_BACKUP, ctrl_chr);
120    }
121    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
122    retval += res;
123    if (ctrl_chr != BLK_END_OF_TAPE) {
124        wrong_marker(BLK_END_OF_TAPE, ctrl_chr);
125    }
126    for (i = 0; i < 8 && !feof(g_tape_stream); i++) {
127        (void) fread(blk, 1, 256 * 1024, g_tape_stream);
128    }
129    sleep(1);
130    paranoid_system("sync");
131    sleep(1);
132    paranoid_pclose(g_tape_stream);
133    log_it("closein_tape() -- leaving");
134/*
135  for(i=0; i < g_tapecatalog->entries; i++)
136    {
137      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);
138    }
139*/
140    if (!bkpinfo->please_dont_eject) {
141        eject_device(bkpinfo->media_device);
142    }
143    mr_free(blk);
144    mr_free(g_tapecatalog);
145    return (retval);
146}
147
148
149
150/**
151 * Close the global output file descriptor which Mondo has been using to write
152 * to the tape device (via buffer or dd).
153 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
154 * @return 0 for success, nonzero for failure.
155 * @note This should be called by backup processes only.
156 */
157int closeout_tape(struct s_bkpinfo *bkpinfo)
158{
159    /*@ int's ******************************************************* */
160    int retval = 0;
161//  int res = 0;
162//  int ctrl_chr = '\0';
163
164    /*@ buffers ***************************************************** */
165//  char fname[MAX_STR_LEN];
166
167    /*@ long long's ************************************************* */
168//  long long size;
169    int i;
170    char *blk;
171
172    blk = (char *) mr_malloc(256 * 1024);
173
174    sleep(1);
175    paranoid_system("sync");
176    sleep(1);
177    log_it("closeout_tape() -- entering");
178    retval +=
179        write_header_block_to_stream((off_t)0, "end-of-backup",
180                                     BLK_END_OF_BACKUP);
181    retval += write_header_block_to_stream((off_t)0, "end-of-tape", BLK_END_OF_TAPE);   /* just in case */
182/* write 1MB of crap */
183    for (i = 0; i < 256 * 1024; i++) {
184        blk[i] = (int) (random() & 0xFF);
185    }
186    for (i = 0; i < 4 * 8; i++) {
187        (void) fwrite(blk, 1, 256 * 1024, g_tape_stream);
188        if (should_we_write_to_next_tape
189            (bkpinfo->media_size[g_current_media_number], (off_t)256 * 1024)) {
190            start_to_write_to_next_tape(bkpinfo);
191        }
192    }
193/* write 1MB of zeroes */
194/*
195    for (i = 0; i < 256*1024; i++)
196      {
197        blk[i] = 0;
198      }
199    for (i = 0; i < 4; i++)
200      {
201        fwrite (blk, 1, 256*1024, g_tape_stream);
202        if (should_we_write_to_next_tape (bkpinfo->media_size[g_current_media_number], 256*1024))
203          {
204            start_to_write_to_next_tape (bkpinfo);
205          }
206      }
207*/
208    sleep(2);
209    paranoid_pclose(g_tape_stream);
210    log_it("closeout_tape() -- leaving");
211    for (i = 0; i < g_tapecatalog->entries; i++) {
212        log_it("i=%d type=%s num=%d aux=%ld posK=%lld", i,
213               (g_tapecatalog->el[i].type ==
214                fileset) ? "fileset" : "bigslice",
215               g_tapecatalog->el[i].number, g_tapecatalog->el[i].aux,
216               g_tapecatalog->el[i].tape_posK);
217    }
218    //  if (!bkpinfo->please_dont_eject)
219    //    { eject_device(bkpinfo->media_device); }
220    mr_free(blk);
221    mr_free(g_tapecatalog);
222    return (retval);
223}
224
225
226
227bool mt_says_tape_exists(char *dev)
228{
229    char *command;
230    int res;
231
232    malloc_string(command);
233    sprintf(command, "mt -f %s status", dev);
234    res = run_program_and_log_output(command, 1);
235    mr_free(command);
236    if (res) {
237        return (FALSE);
238    } else {
239        return (TRUE);
240    }
241}
242
243
244
245/**
246 * Determine the name and size of the tape device. Tries the SCSI tape for
247 * this platform, then the IDE tape, then "/dev/st0", then "/dev/osst0".
248 * @param dev Where to put the found tape device.
249 * @param siz Where to put the tape size (a string like "4GB")
250 * @return 0 if success, nonzero if failure (in which @p dev and @p siz are undefined).
251 */
252int find_tape_device_and_size(char *dev, char *siz)
253{
254    char tmp[MAX_STR_LEN];
255    char command[MAX_STR_LEN * 2];
256    char cdr_exe[MAX_STR_LEN];
257//  char tape_description_[MAX_STR_LEN];
258//  char tape_manufacturer_cdr[MAX_STR_LEN];
259//  FILE*fin;
260    int res;
261
262    log_to_screen("I am looking for your tape streamer. Please wait.");
263    dev[0] = siz[0] = '\0';
264    if (find_home_of_exe("cdrecord")) {
265        strcpy(cdr_exe, "cdrecord");
266    } else {
267        strcpy(cdr_exe, "dvdrecord");
268    }
269    sprintf(command, "%s -scanbus 2> /dev/null | grep -i tape | wc -l",
270            cdr_exe);
271    strcpy(tmp, call_program_and_get_last_line_of_output(command));
272    if (atoi(tmp) != 1) {
273        log_it
274            ("Either too few or too many tape streamers for me to detect...");
275        strcpy(dev, VANILLA_SCSI_TAPE);
276        return 1;
277    }
278    sprintf(command,
279            "%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",
280            cdr_exe);
281    strcpy(tmp, call_program_and_get_last_line_of_output(command));
282    if (strlen(tmp) < 2) {
283        log_it("Could not find tape device");
284        return 1;
285    }
286    sprintf(command,
287            "%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",
288            cdr_exe);
289    strcpy(tmp, call_program_and_get_last_line_of_output(command));
290    strcpy(dev, VANILLA_SCSI_TAPE);
291    dev[strlen(dev) - 1] = '\0';
292    strcat(dev, tmp);           // e.g. '/dev/st0' becomes '/dev/stN'
293    res = 0;
294    if (!mt_says_tape_exists(dev)) {
295        strcpy(dev, ALT_TAPE);
296        if (!mt_says_tape_exists(dev)) {
297            log_it("Cannot openin %s", dev);
298            strcpy(dev, "/dev/st0");
299            if (!mt_says_tape_exists(dev)) {
300                log_it("Cannot openin %s", dev);
301                strcpy(dev, "/dev/osst0");
302                if (!mt_says_tape_exists(dev)) {
303                    res++;
304                } else {
305                    res = 0;
306                }
307            }
308        }
309    }
310
311    log_it("At this point, dev = %s and res = %d", dev, res);
312
313    strcpy(tmp, call_program_and_get_last_line_of_output("\
314cdrecord -scanbus 2> /dev/null | tr -s '\t' ' ' | \
315grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | \
316awk '{for(i=1; i<NF; i++) { if (index($i, \"GB\")>0) { print $i;};};};'"));
317
318    if (mt_says_tape_exists(dev)) {
319        res = 0;
320    } else {
321        log_it("Turning %s", dev);
322        strcpy(tmp, (strrchr(dev, '/') != NULL) ? strrchr(dev, '/') : dev);
323        sprintf(dev, "/dev/os%s", tmp);
324        log_it("...into %s", dev);
325        if (mt_says_tape_exists(dev)) {
326            res = 0;
327        } else {
328            res++;
329        }
330    }
331
332    siz[0] = '\0';
333    log_it("res=%d; dev=%s", res, dev);
334
335    if (res) {
336        return (res);
337    }
338
339    if (strlen(tmp) < 2) {
340        siz[0] = '\0';
341        log_it("Warning - size of tape unknown");
342        return (0);
343    } else {
344        strcpy(siz, tmp);
345        return (0);
346    }
347}
348
349
350
351
352
353
354int read_EXAT_files_from_tape(struct s_bkpinfo *bkpinfo,
355                              long long *ptmp_size, char *tmp_fname,
356                              int *pctrl_chr, char *xattr_fname,
357                              char *acl_fname)
358{
359    int res = 0;
360    int retval = 0;
361    char *fname = (char *)&res;                 /* Should NOT be NULL */
362
363// xattr
364    if (g_getfattr) {
365        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
366        if (*pctrl_chr != BLK_START_EXAT_FILE) {
367            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
368        }
369        if (!strstr(fname, "xattr")) {
370            fatal_error("Wrong order, sunshine.");
371        }
372        read_file_from_stream_to_file(bkpinfo, xattr_fname, *ptmp_size);
373        res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
374        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
375            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
376        }
377        mr_msg(1, "Got xattr");
378    }
379// acl
380    if (g_getfacl) {
381        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
382        if (!strstr(fname, "acl")) {
383            fatal_error("Wrong order, sunshine.");
384        }
385        if (*pctrl_chr != BLK_START_EXAT_FILE) {
386            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
387        }
388        read_file_from_stream_to_file(bkpinfo, acl_fname, *ptmp_size);
389        res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
390        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
391            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
392        }
393        res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
394        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
395            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
396        }
397        mr_msg(1, "Got acl");
398    }
399// tarball itself
400    res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
401    mr_msg(1, "now looking for afioball");
402    return (retval);
403}
404
405
406int write_EXAT_files_to_tape(struct s_bkpinfo *bkpinfo, char *xattr_fname,
407                             char *acl_fname)
408{
409    int res = 0;
410    if (g_getfattr) {
411    // xattr
412        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
413                             BLK_START_EXTENDED_ATTRIBUTES);
414        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
415                             BLK_START_EXAT_FILE);
416        write_file_to_stream_from_file(bkpinfo, xattr_fname);
417        write_header_block_to_stream((off_t)-1, xattr_fname, BLK_STOP_EXAT_FILE);
418    }
419    if (g_getfacl) {
420    // acl
421        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
422                             BLK_START_EXAT_FILE);
423        write_file_to_stream_from_file(bkpinfo, acl_fname);
424        write_header_block_to_stream((off_t)-1, acl_fname, BLK_STOP_EXAT_FILE);
425        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
426                             BLK_STOP_EXTENDED_ATTRIBUTES);
427    }
428    return (res);
429}
430
431
432
433
434/**
435 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
436 * @param tapeno The tape number to insist on.
437 * @bug There is currently no way to actually verify that the user has actually
438 * inserted the right tape.
439 */
440void insist_on_this_tape_number(int tapeno)
441{
442    int i;
443    char tmp[MAX_STR_LEN];
444
445    log_it("Insisting on tape #%d", tapeno);
446    if (g_current_media_number != tapeno) {
447        //      log_it("g_current_media_number = %d", g_current_media_number);
448        sprintf(tmp,
449                "When the tape drive goes quiet, please insert volume %d in this series.",
450                tapeno);
451        popup_and_OK(tmp);
452        open_evalcall_form("Waiting while the tape drive settles");
453    } else {
454        open_evalcall_form("Waiting while the tape drive rewinds");
455    }
456
457    for (i = 0; i <= 100; i += 2) {
458        usleep(100000);
459        update_evalcall_form(i);
460    }
461    close_evalcall_form();
462    log_it("I assume user has inserted it. They _say_ they have...");
463    g_current_media_number = tapeno;
464
465    //  log_it("g_current_media_number = %d", g_current_media_number);
466    log_it("OK, I've finished insisting. On with the revelry.");
467}
468
469
470
471
472/**
473 * Debugging aid - log the offset we're at on the tape (reading or writing).
474 */
475void log_tape_pos(void)
476{
477    /*@ buffers ***************************************************** */
478
479
480    /*@ end vars *************************************************** */
481
482    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
483           (long) g_tape_posK >> 10);
484}
485
486
487
488
489/**
490 * Add a file to a collection of recently archived filesets/slices.
491 * The type is determined by the filename: if it contains ".afio." it is
492 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
493 * otherwise we generate a fatal_error().
494 * @param td The current @c bkpinfo->tempdir (file will be placed in <tt>td</tt>/tmpfs/backcatalog/).
495 * @param latest_fname The file to place in the collection.
496 * @return 0, always.
497 * @bug Return value is redundant.
498 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
499 */
500int maintain_collection_of_recent_archives(char *td, char *latest_fname)
501{
502    long long final_alleged_writeK, final_projected_certain_writeK,
503        final_actually_certain_writeK = 0, cposK, bufsize_K;
504    int last, curr, i;
505    t_archtype type = other;
506    char command[MAX_STR_LEN];
507    char tmpdir[MAX_STR_LEN];
508    char old_fname[MAX_STR_LEN];
509    char *p;
510    char suffix[16];
511
512    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
513    sprintf(tmpdir, "%s/tmpfs/backcatalog", td);
514    if ((p = strrchr(latest_fname, '.'))) {
515        strcpy(suffix, ++p);
516    } else {
517        suffix[0] = '\0';
518    }
519    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
520        type = fileset;
521    } else if (strstr(latest_fname, "slice")) {
522        type = biggieslice;
523    } else {
524        log_it("fname = %s", latest_fname);
525        fatal_error
526            ("Unknown type. Internal error in maintain_collection_of_recent_archives()");
527    }
528    mkdir(tmpdir, 0x700);
529    sprintf(command, "cp -f %s %s", latest_fname, tmpdir);
530    if (run_program_and_log_output(command, 6)) {
531        log_it("Warning - failed to copy %s to backcatalog at %s",
532               latest_fname, tmpdir);
533    }
534    last = g_tapecatalog->entries - 1;
535    if (last <= 0) {
536        iamhere("Too early to start deleting from collection.");
537        return (0);
538    }
539    final_alleged_writeK = g_tapecatalog->el[last].tape_posK;
540    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
541    for (curr = last; curr >= 0; curr--) {
542        cposK = g_tapecatalog->el[curr].tape_posK;
543        if (cposK < final_projected_certain_writeK) {
544            final_actually_certain_writeK = cposK;
545            break;
546        }
547    }
548    if (curr < 0) {
549        iamhere
550            ("Not far enough into tape to start deleting old archives from collection.");
551        return (0);
552    }
553//  log_it( "There are %lld KB (more than %d KB) in my backcatalog", final_alleged_writeK - final_actually_certain_writeK, bufsize_K);
554
555    for (i = curr - 1; i >= 0 && curr - i < 10; i--) {
556        sprintf(old_fname, "%s/%s", tmpdir, g_tapecatalog->el[i].fname);
557        unlink(old_fname);
558    }
559    return (0);
560}
561
562
563
564
565/**
566 * Open the CD stream for input.
567 * @param bkpinfo The backup information structure. Passed to openin_tape().
568 * @return 0 for success, nonzero for failure.
569 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
570 */
571int openin_cdstream(struct s_bkpinfo *bkpinfo)
572{
573    return (openin_tape(bkpinfo));
574}
575
576/**
577 * FIFO used to read/write to the tape device.
578 * @bug This seems obsolete now that we call an external @c buffer program. Please look onto this.
579 */
580char g_tape_fifo[MAX_STR_LEN];
581
582
583
584int set_tape_block_size_with_mt(char *tapedev,
585                                long internal_tape_block_size)
586{
587    char *tmp;
588    int res;
589
590    if (strncmp(tapedev, "/dev/", 5)) {
591        mr_msg(1,
592                "Not using 'mt setblk'. This isn't an actual /dev entry.");
593        return (0);
594    }
595    malloc_string(tmp);
596    sprintf(tmp, "mt -f %s setblk %ld", tapedev, internal_tape_block_size);
597    res = run_program_and_log_output(tmp, 3);
598    mr_free(tmp);
599    return (res);
600}
601
602
603
604/**
605 * Open the tape device for input.
606 * @param bkpinfo The backup information structure. Fields used:
607 * - @c bkpinfo->media_device
608 * - @c bkpinfo->tmpdir
609 * @return 0 for success, nonzero for failure.
610 * @note This will also work with a cdstream for now, but don't count on this behavior.
611 */
612int openin_tape(struct s_bkpinfo *bkpinfo)
613{
614    /*@ buffer ***************************************************** */
615    char fname[MAX_STR_LEN];
616    char *datablock;
617    char tmp[MAX_STR_LEN];
618    char old_cwd[MAX_STR_LEN];
619    char outfname[MAX_STR_LEN];
620    /*@ int ******************************************************* */
621    int i;
622    int j;
623    int res;
624    long length, templong;
625    size_t k;
626    int retval = 0;
627    int ctrl_chr;
628
629    /*@ long long ************************************************* */
630    long long size;
631
632    /*@ pointers ************************************************** */
633    FILE *fout;
634
635    /*@ end vars *************************************************** */
636
637    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
638    g_tapecatalog = mr_malloc(sizeof(struct s_tapecatalog));
639    g_tapecatalog->entries = 0;
640    g_tape_posK = 0;
641    if (g_tape_stream) {
642        log_it("FYI - I won't 'openin' the tape. It's already open.");
643        return (0);
644    }
645    insist_on_this_tape_number(1);
646    sprintf(outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
647    make_hole_for_file(outfname);
648
649    set_tape_block_size_with_mt(bkpinfo->media_device,
650                                bkpinfo->internal_tape_block_size);
651
652//  start_buffer_process( bkpinfo->media_device, g_tape_fifo, FALSE);
653    log_it("Opening IN tape");
654    if (!
655        (g_tape_stream =
656         open_device_via_buffer(bkpinfo->media_device, 'r',
657                                bkpinfo->internal_tape_block_size))) {
658        log_OS_error(g_tape_fifo);
659        log_to_screen("Cannot openin stream device");
660        return (1);
661    }
662    log_to_screen("Reading stream");
663    log_it("stream device = '%s'", bkpinfo->media_device);
664/* skip data disks */
665    open_evalcall_form("Skipping data disks on stream");
666    log_to_screen("Skipping data disks on stream");
667    if (!(fout = fopen(outfname, "w"))) {
668        log_OS_error(outfname);
669        log_to_screen("Cannot openout datadisk all.tar.gz file");
670        return (-1);
671    }
672    datablock = (char *) mr_malloc(256 * 1024);
673    for (i = 0; i < 32; i++) {
674        for (j = 0; j < 4; j++) {
675            for (length = 0, k = 0; length < 256 * 1024; length += k) {
676                k = fread(datablock + length, 1, 256 * 1024 - length,
677                          g_tape_stream);
678            }
679            (void) fwrite(datablock, 1, (size_t) length, fout);
680            g_tape_posK += length / 1024;
681        }
682        if (i > 8)              // otherwise, 'buffer' distorts calculations
683        {
684            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
685            update_evalcall_form((int) (templong));
686        }
687    }
688    paranoid_fclose(fout);
689    mr_free(datablock);
690/* find initial blocks */
691    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
692    retval += res;
693    if (ctrl_chr != BLK_START_OF_TAPE) {
694        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
695    }
696    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
697    retval += res;
698    if (ctrl_chr != BLK_START_OF_BACKUP) {
699        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
700    }
701    close_evalcall_form();
702    log_it("Saved all.tar.gz to '%s'", outfname);
703    (void) getcwd(old_cwd, MAX_STR_LEN);
704    chdir(bkpinfo->tmpdir);
705    sprintf(tmp, "tar -zxf %s tmp/mondo-restore.cfg 2> /dev/null",
706            outfname);
707    paranoid_system(tmp);
708    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
709    chdir(old_cwd);
710    unlink(outfname);
711    return (retval);
712}
713
714
715/**
716 * Start writing to a CD stream.
717 * @param cddev The CD device to openout via cdrecord.
718 * @param speed The speed to write at.
719 * @return 0 for success, nonzero for failure.
720 * @note This should be called only from backup processes.
721 */
722int openout_cdstream(char *cddev, int speed)
723{
724    /*@ buffers ***************************************************** */
725    char command[MAX_STR_LEN * 2];
726
727    /*@ end vars *************************************************** */
728
729/*  add 'dummy' if testing */
730    sprintf(command,
731            "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
732            cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
733/*  initialise the catalog */
734    g_current_media_number = 1;
735    g_tapecatalog = mr_malloc(sizeof(struct s_tapecatalog));
736    g_tapecatalog->entries = 0;
737/* log stuff */
738    log_it("Opening OUT cdstream with the command");
739    log_it(command);
740/*  log_it("Let's see what happens, shall we?"); */
741    g_tape_stream = popen(command, "w");
742    if (g_tape_stream) {
743        return (0);
744    } else {
745        log_to_screen("Failed to openout to cdstream (fifo)");
746        return (1);
747    }
748}
749
750/**
751 * Start writing to a tape device for the backup.
752 * @param tapedev The tape device to open for writing.
753 * @return 0 for success, nonzero for failure.
754 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
755 * EXISTING DATA on the tape!
756 */
757int openout_tape(char *tapedev, long internal_tape_block_size)
758{
759//  char sz_call_to_buffer[MAX_STR_LEN];
760
761    g_current_media_number = 1;
762    if (g_tape_stream) {
763        log_it("FYI - I won't 'openout' the tape. It's already open.");
764        return (0);
765    }
766    g_tapecatalog = mr_malloc(sizeof(struct s_tapecatalog));
767    g_tapecatalog->entries = 0;
768    g_tape_posK = 0;
769
770    set_tape_block_size_with_mt(tapedev, internal_tape_block_size);
771    log_it("Opening OUT tape");
772    if (!
773        (g_tape_stream =
774         open_device_via_buffer(tapedev, 'w', internal_tape_block_size))) {
775        log_OS_error(g_tape_fifo);
776        log_to_screen("Cannot openin stream device");
777        return (1);
778    }
779    return (0);
780}
781
782
783
784
785/**
786 * Copy a file from the opened stream (CD or tape) to @p outfile.
787 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
788 * @param outfile The file to write to.
789 * @param size The size of the file in the input stream.
790 * @return 0 for success, nonzero for failure.
791 */
792int
793read_file_from_stream_to_file(struct s_bkpinfo *bkpinfo, char *outfile,
794                              long long size)
795{
796
797    /*@ int ******************************************************** */
798    int res;
799
800    /*@ end vars *************************************************** */
801
802    res = read_file_from_stream_FULL(bkpinfo, outfile, NULL, size);
803
804    return (res);
805}
806
807
808
809/**
810 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
811 * by @p fout.
812 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
813 * @param fout The stream to write the file to.
814 * @param size The size of the file in bytes.
815 * @return 0 for success, nonzero for failure.
816 */
817int
818read_file_from_stream_to_stream(struct s_bkpinfo *bkpinfo, FILE * fout,
819                                long long size)
820{
821
822    /*@ int ******************************************************** */
823    int res;
824
825    /*@ end vars *************************************************** */
826
827    res = read_file_from_stream_FULL(bkpinfo, NULL, fout, size);
828/*  fflush(g_tape_stream);
829  fflush(fout);*/
830    return (res);
831}
832
833
834
835/**
836 * Copy a file from the currently opened stream (CD or tape) to either a
837 * @c FILE pointer indicating a currently-opened file, or a filename indicating
838 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
839 * and read_file_from_stream_to_stream() are wrappers for.
840 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
841 * @param outfname If non-NULL, write to this file.
842 * @param foutstream If non-NULL, write to this stream.
843 * @param orig_size The original length of the file in bytes.
844 * @return 0 for success, nonzero for failure.
845 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
846 */
847int
848read_file_from_stream_FULL(struct s_bkpinfo *bkpinfo, char *outfname,
849                           FILE * foutstream, long long orig_size)
850{
851    /*@ buffers ***************************************************** */
852    char *tmp;
853    char *datablock;
854    char *temp_fname;
855    char *temp_cksum;
856    char *actual_cksum;
857//  char *pA, *pB;
858
859    /*@ int ********************************************************* */
860    int retval = 0;
861#ifdef EXTRA_TAPE_CHECKSUMS
862    int i, ch;
863#endif
864    int noof_blocks;
865    int ctrl_chr;
866    int res;
867    /*@ pointers **************************************************** */
868    FILE *fout;
869
870    /*@ long    ***************************************************** */
871    long bytes_to_write = 0 /*,i */ ;
872//  long bytes_successfully_read_in_this_time = 0;
873
874    /*@ long long *************************************************** */
875    long long temp_size, size;
876    long bytes_read, bytes_to_read;
877    long long total_read_from_tape_for_this_file = 0;
878    long long where_I_was_before_tape_change = 0;
879    /*@ unsigned int ************************************************ */
880    /*  unsigned int ch; */
881    unsigned int crc16;
882    unsigned int crctt;
883
884    bool had_to_resync = FALSE;
885
886    /*@ init  ******************************************************* */
887    malloc_string(tmp);
888    malloc_string(temp_fname);
889    malloc_string(temp_cksum);
890    malloc_string(actual_cksum);
891    datablock = mr_malloc(TAPE_BLOCK_SIZE);
892    crc16 = 0;
893    crctt = 0;
894    size = orig_size;
895
896    /*@ end vars *************************************************** */
897
898    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
899    if (orig_size != temp_size && orig_size != -1) {
900        sprintf(tmp,
901                "output file's size should be %ld K but is apparently %ld K",
902                (long) size >> 10, (long) temp_size >> 10);
903        log_to_screen(tmp);
904    }
905    if (ctrl_chr != BLK_START_FILE) {
906        wrong_marker(BLK_START_FILE, ctrl_chr);
907        return (1);
908    }
909    sprintf(tmp, "Reading file from tape; writing to '%s'; %ld KB",
910            outfname, (long) size >> 10);
911
912    if (foutstream) {
913        fout = foutstream;
914    } else {
915        fout = fopen(outfname, "w");
916    }
917    if (!fout) {
918        log_OS_error(outfname);
919        log_to_screen("Cannot openout file");
920        return (1);
921    }
922    total_read_from_tape_for_this_file = 0;
923    for (noof_blocks = 0; size > 0;
924         noof_blocks++, size -=
925         bytes_to_write, total_read_from_tape_for_this_file +=
926         bytes_read) {
927        bytes_to_write =
928            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
929        bytes_to_read = TAPE_BLOCK_SIZE;
930        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
931        while (bytes_read < bytes_to_read) {    // next tape!
932//    crctt=crc16=0;
933            where_I_was_before_tape_change = size;
934            mr_msg(4, "where_I_was_... = %lld",
935                    where_I_was_before_tape_change);
936            start_to_read_from_next_tape(bkpinfo);
937            mr_msg(4, "Started reading from next tape.");
938            skip_incoming_files_until_we_find_this_one(temp_fname);
939            mr_msg(4, "Skipped irrelevant files OK.");
940            for (size = orig_size; size > where_I_was_before_tape_change;
941                 size -= bytes_to_write) {
942                bytes_read =
943                    fread(datablock, 1, bytes_to_read, g_tape_stream);
944            }
945            mr_msg(4, "'size' is now %lld (should be %lld)", size,
946                    where_I_was_before_tape_change);
947            log_to_screen("Successfully re-sync'd tape");
948            had_to_resync = TRUE;
949            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
950        }
951
952        (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
953
954#ifdef EXTRA_TAPE_CHECKSUMS
955        for (i = 0; i < (int) bytes_to_write; i++) {
956            ch = datablock[i];
957            crc16 = updcrcr(crc16, (unsigned) ch);
958            crctt = updcrc(crctt, (unsigned) ch);
959        }
960#endif
961    }
962    mr_msg(6, "Total read from tape for this file = %lld",
963            total_read_from_tape_for_this_file);
964    mr_msg(6, ".......................... Should be %lld", orig_size);
965    g_tape_posK += total_read_from_tape_for_this_file / 1024;
966    sprintf(actual_cksum, "%04x%04x", crc16, crctt);
967    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
968    } else {
969        paranoid_fclose(fout);
970    }
971    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
972    if (ctrl_chr != BLK_STOP_FILE) {
973        wrong_marker(BLK_STOP_FILE, ctrl_chr);
974//      fatal_error("Bad marker"); // return(1);
975    }
976    if (strcmp(temp_cksum, actual_cksum)) {
977        sprintf(tmp, "actual cksum=%s; recorded cksum=%s", actual_cksum,
978                temp_cksum);
979        log_to_screen(tmp);
980        sprintf(tmp, "%s (%ld K) is corrupt on tape", temp_fname,
981                (long) orig_size >> 10);
982        log_to_screen(tmp);
983        retval++;
984    } else {
985        sprintf(tmp, "%s is GOOD on tape", temp_fname);
986        /*      log_it(tmp); */
987    }
988    mr_free(datablock);
989    mr_free(tmp);
990    mr_free(temp_fname);
991    mr_free(temp_cksum);
992    mr_free(actual_cksum);
993    return (retval);
994}
995
996
997
998/**
999 * Read a header block from the currently opened stream (CD or tape).
1000 * This block indicates the length of the following file (if it's file-related)
1001 * the filename (if it's file-related), and the block type.
1002 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
1003 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
1004 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
1005 * @return 0 for success, nonzero for failure.
1006 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
1007 */
1008int
1009read_header_block_from_stream(long long *plen, char *filename,
1010                              int *pcontrol_char)
1011{
1012
1013    /*@ buffers ***************************************************** */
1014    char *tempblock;
1015
1016    /*@ int ********************************************************* */
1017    int i, retval;
1018
1019    /*@ end vars *************************************************** */
1020
1021    tempblock = (char *) mr_malloc((size_t) TAPE_BLOCK_SIZE);
1022
1023    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1024        tempblock[i] = 0;
1025    }
1026    while (!(*pcontrol_char = tempblock[7000])) {
1027        g_tape_posK +=
1028            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1029                  g_tape_stream) / 1024;
1030    }
1031/*  memcpy((char*)plength_of_incoming_file,(char*)tempblock+7001,sizeof(long long)); */
1032/*  for(*plen=0,i=7;i>=0;i--) {*plen<<=8; *plen |= tempblock[7001+i];} */
1033    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1034    if (strcmp(tempblock + 6000 + *pcontrol_char, "Mondolicious, baby")) {
1035        log_it("Bad header block at %ld K", (long) g_tape_posK);
1036    }
1037    strcpy(filename, tempblock + 1000);
1038/*  strcpy(cksum,tempblock+5555);*/
1039/*  log_it( "%s  (reading) fname=%s, filesize=%ld K",
1040       marker_to_string (*pcontrol_char), filename,
1041       (long) ((*plen) >> 10));
1042*/
1043    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1044        log_to_screen("I can't verify an aborted backup.");
1045        retval = 1;
1046    } else {
1047        retval = 0;
1048    }
1049    for (i = 1000; i < 1020; i++) {
1050        if (tempblock[i] < 32 || tempblock[i] > 126) {
1051            tempblock[i] = ' ';
1052        }
1053    }
1054    tempblock[i] = '\0';
1055    mr_msg(6, "%s (fname=%s, size=%ld K)",
1056            marker_to_string(*pcontrol_char), tempblock + 1000,
1057            (long) (*plen) >> 10);
1058    mr_free(tempblock);
1059    return (retval);
1060}
1061
1062
1063
1064/**
1065 * Add specified file/slice to the internal catalog of all archives written.
1066 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1067 * write the last [buffer size] MB from the catalog to the new tape, so we know
1068 * we have @e all archives on some CD/tape/whatever.
1069 * @param type The type of file we're cataloging (afioball, slice, something else)
1070 * @param number The fileset number or biggiefile number.
1071 * @param aux The slice number if it's a biggiefile, or any other additional info.
1072 * @param fn The original full pathname of the file we're recording.
1073 * @return The index of the record we just added.
1074 */
1075int register_in_tape_catalog(t_archtype type, int number, long aux,
1076                             char *fn)
1077{
1078    int last;
1079    char fname[MAX_TAPECAT_FNAME_LEN];
1080    char *p;
1081
1082    p = strrchr(fn, '/');
1083    if (p) {
1084        p++;
1085    } else {
1086        p = fn;
1087    }
1088    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1089    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1090    last = g_tapecatalog->entries;
1091    if (last >= MAX_TAPECATALOG_ENTRIES) {
1092        log_it
1093            ("Warning - can't log #%d in tape catalog - too many entries already",
1094             number);
1095        return (-1);
1096    }
1097    g_tapecatalog->el[last].type = type;
1098    g_tapecatalog->el[last].number = number;
1099    g_tapecatalog->el[last].aux = aux;
1100    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1101    strcpy(g_tapecatalog->el[last].fname, fname);
1102    g_tapecatalog->entries++;
1103    return (last);              // returns the index of the record we've jsut added
1104}
1105
1106
1107
1108
1109/**
1110 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1111 * (got SIGPIPE) or look like we will.
1112 * @param mediasize The size of the tape in megabytes.
1113 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1114 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1115 * autodetecting the size. Huh?
1116 */
1117
1118/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1119bool
1120should_we_write_to_next_tape(long mediasize,
1121                             off_t length_of_incoming_file)
1122{
1123    /*@ bool's ***************************************************** */
1124    bool we_need_a_new_tape = FALSE;
1125
1126    /*@ end vars *************************************************** */
1127
1128    if (mediasize == 0) {
1129        return (FALSE);
1130    }
1131    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1132        log_it("mediasize = %ld", mediasize);
1133        we_need_a_new_tape = TRUE;
1134        log_to_screen("Should have started a new tape/CD already");
1135    }
1136    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1137        mediasize - (SLICE_SIZE * 4 / 1024)) {
1138        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1139               mediasize);
1140        we_need_a_new_tape = TRUE;
1141    }
1142    return (we_need_a_new_tape);
1143}
1144
1145
1146/**
1147 * Seek through the stream until we find a header block where the NAME field matches
1148 * @p the_file_I_was_reading. This is useful if you've just started reading from
1149 * a new tape and want to find the file you were reading when the tape ended.
1150 * @param the_file_I_was_reading File name to look for.
1151 * @return 0 for success, nonzero for failure.
1152 */
1153int skip_incoming_files_until_we_find_this_one(char
1154                                               *the_file_I_was_reading)
1155{
1156    char *pA;
1157    char *pB;
1158    int res;
1159    int ctrl_chr;
1160    char *temp_fname;
1161    char *datablock;
1162    long long temp_size, size;
1163    long bytes_to_write;
1164
1165    datablock = mr_malloc(TAPE_BLOCK_SIZE);
1166    malloc_string(temp_fname);
1167    pB = strrchr(the_file_I_was_reading, '/');
1168    if (pB) {
1169        pB++;
1170    } else {
1171        pB = the_file_I_was_reading;
1172    }
1173    mr_msg(1, "skip_incoming_..(%s)", pB);
1174    mr_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1175    ctrl_chr = -1;
1176    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1177        res =
1178            read_header_block_from_stream(&temp_size, temp_fname,
1179                                          &ctrl_chr);
1180        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1181            break;
1182        }
1183        mr_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1184        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1185        mr_msg(3, "Still trying to re-sync w/ tape");
1186    }
1187    while (ctrl_chr != BLK_START_FILE) {
1188        res =
1189            read_header_block_from_stream(&temp_size, temp_fname,
1190                                          &ctrl_chr);
1191        if (ctrl_chr == BLK_START_FILE) {
1192            break;
1193        }
1194        mr_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1195        wrong_marker(BLK_START_FILE, ctrl_chr);
1196        mr_msg(3, "Still trying to re-sync w/ tape");
1197    }
1198    pA = strrchr(temp_fname, '/');
1199    if (pA) {
1200        pA++;
1201    } else {
1202        pA = temp_fname;
1203    }
1204    pB = strrchr(the_file_I_was_reading, '/');
1205    if (pB) {
1206        pB++;
1207    } else {
1208        pB = the_file_I_was_reading;
1209    }
1210    while (strcmp(pA, pB)) {
1211        mr_msg(6, "Skipping %s (it's not %s)", temp_fname,
1212                the_file_I_was_reading);
1213        for (size = temp_size; size > 0; size -= bytes_to_write) {
1214            bytes_to_write =
1215                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1216            // FIXME - needs error-checking and -catching
1217            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1218        }
1219        res =
1220            read_header_block_from_stream(&temp_size, temp_fname,
1221                                          &ctrl_chr);
1222        if (ctrl_chr != BLK_STOP_FILE) {
1223            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1224        }
1225        res =
1226            read_header_block_from_stream(&temp_size, temp_fname,
1227                                          &ctrl_chr);
1228        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1229            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1230        }
1231        res =
1232            read_header_block_from_stream(&temp_size, temp_fname,
1233                                          &ctrl_chr);
1234        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1235            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1236        }
1237        res =
1238            read_header_block_from_stream(&temp_size, temp_fname,
1239                                          &ctrl_chr);
1240        if (ctrl_chr != BLK_START_FILE) {
1241            wrong_marker(BLK_START_FILE, ctrl_chr);
1242        }
1243        pA = strrchr(temp_fname, '/');
1244        if (pA) {
1245            pA++;
1246        } else {
1247            pA = temp_fname;
1248        }
1249        pB = strrchr(the_file_I_was_reading, '/');
1250        if (pB) {
1251            pB++;
1252        } else {
1253            pB = the_file_I_was_reading;
1254        }
1255    }
1256    mr_msg(2, "Reading %s (it matches %s)", temp_fname,
1257            the_file_I_was_reading);
1258    mr_free(temp_fname);
1259    mr_free(datablock);
1260    return (0);
1261}
1262
1263
1264/**
1265 * Start to read from the next tape. Assumes the user has already inserted it.
1266 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1267 * @return 0 for success, nonzero for failure.
1268 */
1269int start_to_read_from_next_tape(struct s_bkpinfo *bkpinfo)
1270{
1271    /*@ int ********************************************************* */
1272    int res = 0;
1273    char *sz_msg;
1274    int ctrlchr;
1275    long long temp_size;
1276    malloc_string(sz_msg);
1277    /*@ end vars *************************************************** */
1278
1279    paranoid_pclose(g_tape_stream);
1280    system("sync");
1281    system("sync");
1282    system("sync");
1283    log_it("Next tape requested.");
1284    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1285    log_it("Opening IN the next tape");
1286    if (!
1287        (g_tape_stream =
1288         open_device_via_buffer(bkpinfo->media_device, 'r',
1289                                bkpinfo->internal_tape_block_size))) {
1290        log_OS_error(g_tape_fifo);
1291        log_to_screen("Cannot openin stream device");
1292        return (1);
1293    }
1294    g_tape_posK = 0;
1295    g_sigpipe = FALSE;
1296    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1297    if (ctrlchr != BLK_START_OF_TAPE) {
1298        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1299    }
1300    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1301    if (ctrlchr != BLK_START_OF_BACKUP) {
1302        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1303    } else {
1304        mr_msg(3, "Next tape opened OK. Whoopee!");
1305    }
1306    mr_free(sz_msg);
1307    return (res);
1308}
1309
1310
1311
1312/**
1313 * Start to write to the next tape. Assume the user has already inserted it.
1314 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1315 * @return 0 for success, nonzero for failure.
1316 */
1317int start_to_write_to_next_tape(struct s_bkpinfo *bkpinfo)
1318{
1319    int res = 0;
1320    char command[MAX_STR_LEN * 2];
1321    paranoid_pclose(g_tape_stream);
1322    system("sync");
1323    system("sync");
1324    system("sync");
1325    log_it("New tape requested.");
1326    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1327    if (g_current_media_number > MAX_NOOF_MEDIA) {
1328        res++;
1329        log_to_screen("Too many tapes. Man, you need to use nfs!");
1330    }
1331    if (bkpinfo->backup_media_type == cdstream) {
1332        sprintf(command,
1333                "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1334                bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE,
1335                MONDO_LOGFILE);
1336        log_it("Opening OUT to next CD with the command");
1337        log_it(command);
1338        log_it("Let's see what happens, shall we?");
1339        g_tape_stream = popen(command, "w");
1340        if (!g_tape_stream) {
1341            log_to_screen("Failed to openout to cdstream (fifo)");
1342            return (1);
1343        }
1344    } else {
1345        log_it("Opening OUT to next tape");
1346        if (!
1347            (g_tape_stream =
1348             open_device_via_buffer(bkpinfo->media_device, 'w',
1349                                    bkpinfo->internal_tape_block_size))) {
1350            log_OS_error(g_tape_fifo);
1351            log_to_screen("Cannot openin stream device");
1352            return (1);
1353        }
1354    }
1355    g_tape_posK = 0;
1356    g_sigpipe = FALSE;
1357    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1358    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1359    return (res);
1360}
1361
1362
1363
1364
1365/**
1366 * Write a bufferfull of the most recent archives to the tape. The
1367 * rationale behind this is a bit complex. If the previous tape ended
1368 * suddenly (EOF or otherwise) some archives were probably left in the
1369 * buffer. That means that Mondo thinks they have been written, but
1370 * the external binary @c buffer has not actually written them. So to
1371 * be safe, we start the new tape by writing the last bufferfull from
1372 * the old one. This insures that all archives will be on at least
1373 * one tape. Sounds inelegant, but it works.
1374 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1375 * @return 0 for success, nonzero for failure.
1376 */
1377int write_backcatalog_to_tape(struct s_bkpinfo *bkpinfo)
1378{
1379    int i, last, res = 0;
1380    char *fname;
1381
1382    mr_msg(2, "I am now writing back catalog to tape");
1383    malloc_string(fname);
1384    last = g_tapecatalog->entries - 1;
1385    for (i = 0; i <= last; i++) {
1386        sprintf(fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir,
1387                g_tapecatalog->el[i].fname);
1388        if (!does_file_exist(fname)) {
1389            mr_msg(6, "Can't write %s - it doesn't exist.", fname);
1390        } else {
1391            write_header_block_to_stream(length_of_file(fname),
1392                                         "start-backcatalog-afio-or-slice",
1393                                         BLK_START_AN_AFIO_OR_SLICE);
1394            mr_msg(2, "Writing %s", fname);
1395            if (write_file_to_stream_from_file(bkpinfo, fname)) {
1396                res++;
1397                mr_msg(2, "%s failed", fname);
1398            }
1399            if (i != last) {
1400                write_header_block_to_stream((off_t)0,
1401                                             "stop-backcatalog-afio-or-slice",
1402                                             BLK_STOP_AN_AFIO_OR_SLICE);
1403            }
1404        }
1405    }
1406    mr_free(fname);
1407    mr_msg(2, "Finished writing back catalog to tape");
1408    return (res);
1409}
1410
1411
1412
1413/**
1414 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1415 * @param fname The path to all.tar.gz.
1416 * @return 0 for success, nonzero for failure.
1417 */
1418int write_data_disks_to_stream(char *fname)
1419{
1420    /*@ pointers *************************************************** */
1421    FILE *fin;
1422    char tmp[MAX_STR_LEN];
1423
1424    /*@ long ******************************************************* */
1425    long m = -1;
1426    long templong;
1427
1428    /*@ int ******************************************************** */
1429    int i, j;
1430
1431    /*@ buffers **************************************************** */
1432    char tempblock[256 * 1024];
1433
1434    /*@ end vars *************************************************** */
1435
1436    open_evalcall_form("Writing data disks to tape");
1437    log_to_screen("Writing data disks to tape");
1438    log_it("Data disks = %s", fname);
1439    if (!does_file_exist(fname)) {
1440        sprintf(tmp, "Cannot find %s", fname);
1441        log_to_screen(tmp);
1442        return (1);
1443    }
1444    if (!(fin = fopen(fname, "r"))) {
1445        log_OS_error(fname);
1446        fatal_error("Cannot openin the data disk");
1447    }
1448    for (i = 0; i < 32; i++) {  /* 32MB */
1449        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1450            if (!feof(fin)) {
1451                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1452            } else {
1453                m = 0;
1454            }
1455            for (; m < 256 * 1024; m++) {
1456                tempblock[m] = '\0';
1457            }
1458            g_tape_posK +=
1459                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1460        }
1461        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1462        {
1463            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1464            update_evalcall_form((int) (templong));
1465        }
1466    }
1467    paranoid_fclose(fin);
1468    close_evalcall_form();
1469    return (0);
1470}
1471
1472
1473
1474
1475/**
1476 * Copy @p infile to the opened stream (CD or tape).
1477 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1478 * @param infile The file to write to the stream.
1479 * @return 0 for success, nonzero for failure.
1480 */
1481int write_file_to_stream_from_file(struct s_bkpinfo *bkpinfo, char *infile)
1482{
1483    /*@ buffers **************************************************** */
1484    char tmp[MAX_STR_LEN];
1485    char datablock[TAPE_BLOCK_SIZE];
1486    char checksum[MAX_STR_LEN];
1487    char *infile_basename;
1488
1489    /*@ int ******************************************************** */
1490    int retval = 0;
1491    int noof_blocks;
1492
1493    /*  unsigned int ch; */
1494    unsigned int crc16;
1495    unsigned int crctt;
1496
1497    /*@ pointers *************************************************** */
1498    FILE *fin;
1499    char *p;
1500
1501    /*@ long ******************************************************* */
1502    long bytes_to_read = 0;
1503    long i;
1504
1505    off_t filesize;
1506
1507#ifdef EXTRA_TAPE_CHECKSUMS
1508    int ch;
1509#endif
1510
1511    /*@ initialize ************************************************ */
1512    crc16 = 0;
1513    crctt = 0;
1514
1515
1516
1517    /*@ end vars *************************************************** */
1518
1519    infile_basename = strrchr(infile, '/');
1520    if (infile_basename) {
1521        infile_basename++;
1522    } else {
1523        infile_basename = infile;
1524    }
1525    filesize = length_of_file(infile);
1526    if (should_we_write_to_next_tape
1527        (bkpinfo->media_size[g_current_media_number], filesize)) {
1528        start_to_write_to_next_tape(bkpinfo);
1529        write_backcatalog_to_tape(bkpinfo);
1530    }
1531    p = strrchr(infile, '/');
1532    if (!p) {
1533        p = infile;
1534    } else {
1535        p++;
1536    }
1537    sprintf(tmp, "Writing file '%s' to tape (%ld KB)", p,
1538            (long) filesize >> 10);
1539    log_it(tmp);
1540    write_header_block_to_stream(filesize, infile_basename,
1541                                 BLK_START_FILE);
1542//go_here_to_restart_saving_of_file:
1543    if (!(fin = fopen(infile, "r"))) {
1544        log_OS_error(infile);
1545        return (1);
1546    }
1547    for (noof_blocks = 0; filesize > 0;
1548         noof_blocks++, filesize -= bytes_to_read) {
1549        if (filesize < TAPE_BLOCK_SIZE) {
1550            bytes_to_read = (long) filesize;
1551            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1552                datablock[i] = '\0';
1553            }
1554        } else {
1555            bytes_to_read = TAPE_BLOCK_SIZE;
1556        }
1557        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1558        g_tape_posK +=
1559            fwrite(datablock, 1, /*bytes_to_read */ 
1560                   (size_t) TAPE_BLOCK_SIZE,
1561                   g_tape_stream) / 1024;
1562        if (g_sigpipe) {
1563            iamhere("Sigpipe occurred recently. I'll start a new tape.");
1564            fclose(fin);
1565            g_sigpipe = FALSE;
1566            start_to_write_to_next_tape(bkpinfo);
1567            write_backcatalog_to_tape(bkpinfo); // kinda-sorta recursive :)
1568            return (0);
1569        }
1570#ifdef EXTRA_TAPE_CHECKSUMS
1571        for (i = 0; i < bytes_to_read; i++) {
1572            ch = datablock[i];
1573            crc16 = updcrcr(crc16, (unsigned) ch);
1574            crctt = updcrc(crctt, (unsigned) ch);
1575        }
1576#endif
1577    }
1578    paranoid_fclose(fin);
1579    sprintf(checksum, "%04x%04x", crc16, crctt);
1580    /* BERLIOS: what does it do ??? */
1581    write_header_block_to_stream((off_t)g_current_media_number, checksum,
1582                                 BLK_STOP_FILE);
1583//  log_it("File '%s' written to tape.", infile);
1584    return (retval);
1585}
1586
1587
1588
1589
1590
1591/**
1592 * Write a header block to the opened stream (CD or tape).
1593 * @param length_of_incoming_file The length to store in the header block.
1594 * Usually matters only if this is a file-related header, in which case it should
1595 * be the length of the file that will follow.
1596 * @param filename The filename to store in the header block. Usually matters
1597 * only if this is a file-related header, in which case this should be the name
1598 * if the file that will follow.
1599 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1600 * @return 0 for success, nonzero for failure.
1601 */
1602int
1603write_header_block_to_stream(off_t length_of_incoming_file,
1604                             char *filename, int control_char)
1605{
1606    /*@ buffers **************************************************** */
1607    char tempblock[TAPE_BLOCK_SIZE];
1608    char tmp[MAX_STR_LEN];
1609    char *p;
1610
1611    /*@ int ******************************************************** */
1612    int i;
1613
1614    off_t olen;
1615
1616    /*@ end vars *************************************************** */
1617
1618
1619    olen = length_of_incoming_file;
1620    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1621    if (!p) {
1622        p = filename;
1623    } else {
1624        p++;
1625    }
1626    if (!g_tape_stream) {
1627        log_to_screen
1628            ("You're not backing up to tape. Why write a tape header?");
1629        return (1);
1630    }
1631    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1632        tempblock[i] = 0;
1633    }
1634    sprintf(tempblock + 6000 + control_char, "Mondolicious, baby");
1635    tempblock[7000] = control_char;
1636/*  for(i=0;i<8;i++) {tempblock[7001+i]=olen&0xff; olen>>=8;} */
1637    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1638/*  if (length_of_incoming_file) {memcpy(tempblock+7001,(char*)&length_of_incoming_file,sizeof(long long));} */
1639    strcpy(tempblock + 1000, filename);
1640/*  strcpy(tempblock+5555,cksum); */
1641    g_tape_posK +=
1642        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1643               g_tape_stream) / 1024;
1644    sprintf(tmp, "%s (fname=%s, size=%ld K)",
1645            marker_to_string(control_char), p,
1646            (long) length_of_incoming_file >> 10);
1647    mr_msg(6, tmp);
1648/*  log_tape_pos(); */
1649    return (0);
1650}
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661/**
1662 * Log (to screen) an erroneous marker, along with what it should have been.
1663 * @param should_be What we were expecting.
1664 * @param it_is What we got.
1665 */
1666void wrong_marker(int should_be, int it_is)
1667{
1668    /*@ buffer ***************************************************** */
1669    char tmp[MAX_STR_LEN];
1670
1671
1672    /*@ end vars *************************************************** */
1673    sprintf(tmp, "Wrong marker! (Should be %s, ",
1674            marker_to_string(should_be));
1675    sprintf(tmp + strlen(tmp), "is actually %s)", marker_to_string(it_is));
1676    log_to_screen(tmp);
1677}
1678
1679/* @} - end of streamGroup */
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