source: trunk/mondo/src/common/libmondo-stream.c @ 900

Last change on this file since 900 was 900, checked in by bruno, 13 years ago

Huge patch to introduce low level functions that will bw used everywhere (mr_free, mr_asprintf, ...)
Nearly linking now due to that.

  • Property svn:keywords set to Id
File size: 46.3 KB
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1/* $Id: libmondo-stream.c 900 2006-10-24 06:49:18Z bruno $
2
3...tools for talking to tapes, Monitas streams, etc.
4*/
5
6/*
7 *
8 * @file
9 * Functions for writing data to/reading data from streams (tape, CD stream, etc.)
10 */
11
12#include <unistd.h>
13
14#include "my-stuff.h"
15#include "mondostructures.h"
16#include "libmondo-devices.h"
17#include "libmondo-stream.h"
18#include "libmondo-string-EXT.h"
19#include "libmondo-files-EXT.h"
20#include "newt-specific-EXT.h"
21#include "libmondo-fork-EXT.h"
22#include "libmondo-tools-EXT.h"
23#include "libmondo-fifo-EXT.h"
24#include "mr_mem.h"
25
26#define EXTRA_TAPE_CHECKSUMS
27
28extern bool g_sigpipe;
29extern int g_tape_buffer_size_MB;
30
31/**
32 * @addtogroup globalGroup
33 * @{
34 */
35/**
36 * The file pointer for the opened tape/CD stream.
37 * Opened and closed by openin_tape(), openin_cdstream(),
38 * openout_tape(), openout_cdstream(), closein_tape(), closein_cdstream(),
39 * closeout_tape(), and closeout_cdstream().
40 */
41FILE *g_tape_stream = NULL;
42
43
44/**
45 * The position (in kilobytes) where we are on the tape.
46 */
47long long g_tape_posK = 0;
48
49/**
50 * The current media number we're using. This value is 1-based.
51 */
52int g_current_media_number = -1;
53
54/**
55 * The tape catalog that keeps track of files written to tape.
56 */
57struct s_tapecatalog *g_tapecatalog;
58
59/* @} - end of globalGroup */
60
61int write_backcatalog_to_tape(struct s_bkpinfo *bkpinfo);
62
63
64
65
66
67/**
68 * @addtogroup streamGroup
69 * @{
70 */
71/**
72 * Close the global output file descriptor which Mondo has used to read
73 * from the CD stream.
74 * @param bkpinfo The backup information structure. Passed directly to closein_tape().
75 * @return 0 for success, nonzero for failure.
76 * @note This should be called by restore processes only.
77 */
78int closein_cdstream(struct s_bkpinfo *bkpinfo)
79{
80    return (closein_tape(bkpinfo));
81}
82
83
84/**
85 * Close the global output file descriptor which Mondo has used to read
86 * from buffer or dd, which read from the tape.
87 * @param bkpinfo The backup information structure. Unused.
88 * @return 0 for success, nonzero for failure.
89 * @note This should be called by restore processes only.
90 * @note This function also works for cdstreams for now, but don't count on this behavior.
91 * @bug @p bkpinfo parameter is unused.
92 */
93int closein_tape(struct s_bkpinfo *bkpinfo)
94{
95    /*@ int's ******************************************************* */
96    int retval = 0;
97    int res = 0;
98    int ctrl_chr = '\0';
99
100    /*@ long long's ************************************************* */
101    long long size;
102    char *blk;
103    int i;
104
105    blk = (char *) malloc(256 * 1024);
106
107    log_it("closein_tape() -- entering");
108    res = read_header_block_from_stream(&size, NULL, &ctrl_chr);
109    retval += res;
110    if (ctrl_chr != BLK_END_OF_BACKUP) {
111        wrong_marker(BLK_END_OF_BACKUP, ctrl_chr);
112    }
113    res = read_header_block_from_stream(&size, NULL, &ctrl_chr);
114    retval += res;
115    if (ctrl_chr != BLK_END_OF_TAPE) {
116        wrong_marker(BLK_END_OF_TAPE, ctrl_chr);
117    }
118    for (i = 0; i < 8 && !feof(g_tape_stream); i++) {
119        (void) fread(blk, 1, 256 * 1024, g_tape_stream);
120    }
121    sleep(1);
122    sync();
123    sleep(1);
124    paranoid_pclose(g_tape_stream);
125    log_it("closein_tape() -- leaving");
126    if (!bkpinfo->please_dont_eject) {
127        eject_device(bkpinfo->media_device);
128    }
129    mr_free(blk);
130    mr_free((void *)g_tapecatalog);
131    return (retval);
132}
133
134
135
136/**
137 * Close the global output file descriptor which Mondo has been using to write
138 * to the tape device (via buffer or dd).
139 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
140 * @return 0 for success, nonzero for failure.
141 * @note This should be called by backup processes only.
142 */
143int closeout_tape(struct s_bkpinfo *bkpinfo)
144{
145    /*@ int's ******************************************************* */
146    int retval = 0;
147
148    /*@ long long's ************************************************* */
149    int i;
150    char *blk;
151
152    blk = (char *) malloc(256 * 1024);
153
154    sleep(1);
155    sync();
156    sleep(1);
157    log_it("closeout_tape() -- entering");
158    retval +=
159        write_header_block_to_stream((off_t)0, "end-of-backup",
160                                     BLK_END_OF_BACKUP);
161    retval += write_header_block_to_stream((off_t)0, "end-of-tape", BLK_END_OF_TAPE);   /* just in case */
162    /* write 1MB of crap */
163    for (i = 0; i < 256 * 1024; i++) {
164        blk[i] = (int) (random() & 0xFF);
165    }
166    for (i = 0; i < 4 * 8; i++) {
167        (void) fwrite(blk, 1, 256 * 1024, g_tape_stream);
168        if (should_we_write_to_next_tape
169            (bkpinfo->media_size[g_current_media_number], (off_t)256 * 1024)) {
170            start_to_write_to_next_tape(bkpinfo);
171        }
172    }
173    sleep(2);
174    paranoid_pclose(g_tape_stream);
175    log_it("closeout_tape() -- leaving");
176    for (i = 0; i < g_tapecatalog->entries; i++) {
177        log_it("i=%d type=%s num=%d aux=%ld posK=%lld", i,
178               (g_tapecatalog->el[i].type ==
179                fileset) ? "fileset" : "bigslice",
180               g_tapecatalog->el[i].number, g_tapecatalog->el[i].aux,
181               g_tapecatalog->el[i].tape_posK);
182    }
183    mr_free(blk);
184    mr_free((void *)g_tapecatalog);
185    return (retval);
186}
187
188
189
190bool mt_says_tape_exists(char *dev)
191{
192    char *command;
193    int res;
194
195    mr_asprintf(&command, "mt -f %s status", dev);
196    res = run_program_and_log_output(command, 1);
197    mr_free(command);
198    if (res) {
199        return (FALSE);
200    } else {
201        return (TRUE);
202    }
203}
204
205
206
207/**
208 * Determine the name and size of the tape device. Tries the SCSI tape for
209 * this platform, then the IDE tape, then "/dev/st0", then "/dev/osst0".
210 * @param dev Where to put the found tape device.
211 * @param siz Where to put the tape size (a string like "4GB"). Should be freed by caller
212 * @return 0 if success, nonzero if failure (in which @p dev and @p siz are undefined).
213 */
214int find_tape_device_and_size(char *dev, char *siz)
215{
216    char *tmp = NULL;
217    char *tmp1 = NULL;
218    char *command = NULL;
219    char *cdr_exe = NULL;
220    int res = 0;
221
222    log_to_screen("I am looking for your tape streamer. Please wait.");
223    dev = NULL;
224    siz = NULL;
225    tmp = find_home_of_exe("cdrecord");
226    if (tmp) {
227        mr_asprintf(&cdr_exe, "cdrecord");
228    } else {
229        mr_asprintf(&cdr_exe, "dvdrecord");
230    }
231    mr_free(tmp);
232
233    mr_asprintf(&command, "%s -scanbus 2> /dev/null | grep -i tape | wc -l",
234             cdr_exe);
235    tmp = call_program_and_get_last_line_of_output(command);
236    mr_free(command);
237
238    if (atoi(tmp) != 1) {
239        log_it
240            ("Either too few or too many tape streamers for me to detect...");
241        mr_asprintf(&dev, VANILLA_SCSI_TAPE"0");
242        mr_free(tmp);
243        mr_free(cdr_exe);
244        return 1;
245    }
246    mr_free(tmp);
247
248    mr_asprintf(&command,
249             "%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",
250             cdr_exe);
251    tmp = call_program_and_get_last_line_of_output(command);
252    mr_free(command);
253    if (strlen(tmp) < 2) {
254        log_it("Could not find tape device");
255        mr_free(tmp);
256        mr_free(cdr_exe);
257        return 1;
258    }
259    mr_free(tmp);
260
261    mr_asprintf(&command,
262             "%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",
263             cdr_exe);
264    mr_free(cdr_exe);
265
266    tmp = call_program_and_get_last_line_of_output(command);
267    mr_free(command);
268
269    mr_asprintf(&dev, VANILLA_SCSI_TAPE"%s", tmp);
270    mr_free(tmp);
271
272    if (!mt_says_tape_exists(dev)) {
273        mr_free(dev); 
274
275        mr_asprintf(&dev, ALT_TAPE"%s", tmp);
276        if (!mt_says_tape_exists(dev)) {
277            log_it("Cannot openin %s", dev);
278            mr_free(dev); 
279
280            mr_asprintf(&dev, VANILLA_SCSI_TAPE"0");
281            if (!mt_says_tape_exists(dev)) {
282                log_it("Cannot openin %s", dev);
283                mr_free(dev); 
284
285                mr_asprintf(&dev, "/dev/osst0");
286                if (!mt_says_tape_exists(dev)) {
287                    res++;
288                } else {
289                    res = 0;
290                }
291            }
292        }
293    }
294
295    log_it("At this point, dev = %s and res = %d", dev, res);
296
297    tmp = call_program_and_get_last_line_of_output("\
298cdrecord -scanbus 2> /dev/null | tr -s '\t' ' ' | \
299grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | \
300awk '{for(i=1; i<NF; i++) { if (index($i, \"GB\")>0) { print $i;};};};'");
301
302    if (mt_says_tape_exists(dev)) {
303        res = 0;
304    } else {
305        log_it("Turning %s", dev);
306        mr_free(tmp);
307        mr_asprintf(&tmp1,
308                 (strrchr(dev, '/') != NULL) ? strrchr(dev, '/') : dev);
309        mr_free(dev);
310        mr_asprintf(&dev, "/dev/os%s", tmp1);
311        mr_free(tmp1);
312
313        log_it("...into %s", dev);
314        if (mt_says_tape_exists(dev)) {
315            res = 0;
316        } else {
317            res++;
318        }
319    }
320
321    log_it("res=%d; dev=%s", res, dev);
322
323    if (res) {
324        mr_free(tmp);
325        return (res);
326    }
327
328    if (strlen(tmp) < 2) {
329        log_it("Warning - size of tape unknown");
330        mr_free(tmp);
331        return (0);
332    } else {
333        siz = tmp;
334        return (0);
335    }
336}
337
338int read_EXAT_files_from_tape(struct s_bkpinfo *bkpinfo,
339                              long long *ptmp_size, char *tmp_fname,
340                              int *pctrl_chr, char *xattr_fname,
341                              char *acl_fname)
342{
343    int res = 0;
344    int retval = 0;
345    char *fname = (char *)&res;         /* Should NOT be NULL */
346
347// xattr
348    res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
349    if (*pctrl_chr != BLK_START_EXAT_FILE) {
350        wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
351    }
352    if (!strstr(fname, "xattr")) {
353        fatal_error("Wrong order, sunshine.");
354    }
355    mr_free(fname);
356    fname = (char *)&res;
357    read_file_from_stream_to_file(bkpinfo, xattr_fname, *ptmp_size);
358    res = read_header_block_from_stream(ptmp_size, NULL, pctrl_chr);
359    if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
360        wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
361    }
362    // acl
363    res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
364    if (!strstr(fname, "acl")) {
365        fatal_error("Wrong order, sunshine.");
366    }
367    mr_free(fname);
368    fname = (char *)&res;
369    if (*pctrl_chr != BLK_START_EXAT_FILE) {
370        wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
371    }
372    read_file_from_stream_to_file(bkpinfo, acl_fname, *ptmp_size);
373    res = read_header_block_from_stream(ptmp_size, NULL, pctrl_chr);
374    if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
375        wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
376    }
377    res = read_header_block_from_stream(ptmp_size, NULL, pctrl_chr);
378    if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
379        wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
380    }
381    // tarball itself
382    res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
383    log_msg(1, "Got xattr and acl; now looking for afioball");
384    tmp_fname = fname;
385    return (retval);
386}
387
388
389int write_EXAT_files_to_tape(struct s_bkpinfo *bkpinfo, char *xattr_fname,
390                             char *acl_fname)
391{
392    int res = 0;
393    // EXATs
394    write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
395                                 BLK_START_EXTENDED_ATTRIBUTES);
396    // xattr
397    write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
398                                 BLK_START_EXAT_FILE);
399    write_file_to_stream_from_file(bkpinfo, xattr_fname);
400    write_header_block_to_stream((off_t)-1, xattr_fname, BLK_STOP_EXAT_FILE);
401// acl
402    write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
403                                 BLK_START_EXAT_FILE);
404    write_file_to_stream_from_file(bkpinfo, acl_fname);
405    write_header_block_to_stream((off_t)-1, acl_fname, BLK_STOP_EXAT_FILE);
406    write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
407                                 BLK_STOP_EXTENDED_ATTRIBUTES);
408    return (res);
409}
410
411
412
413
414/**
415 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
416 * @param tapeno The tape number to insist on.
417 * @bug There is currently no way to actually verify that the user has actually
418 * inserted the right tape.
419 */
420void insist_on_this_tape_number(int tapeno)
421{
422    int i;
423    char *tmp;
424
425    log_it("Insisting on tape #%d", tapeno);
426    if (g_current_media_number != tapeno) {
427        //      log_it("g_current_media_number = %d", g_current_media_number);
428        mr_asprintf(&tmp,
429                 _("When the tape drive goes quiet, please insert volume %d in this series."),
430                 tapeno);
431        popup_and_OK(tmp);
432        mr_free(tmp);
433        open_evalcall_form(_("Waiting while the tape drive settles"));
434    } else {
435        open_evalcall_form(_("Waiting while the tape drive rewinds"));
436    }
437
438    for (i = 0; i <= 100; i += 2) {
439        usleep(100000);
440        update_evalcall_form(i);
441    }
442    close_evalcall_form();
443    log_it("I assume user has inserted it. They _say_ they have...");
444    g_current_media_number = tapeno;
445
446    //  log_it("g_current_media_number = %d", g_current_media_number);
447    log_it("OK, I've finished insisting. On with the revelry.");
448}
449
450
451/**
452 * Debugging aid - log the offset we're at on the tape (reading or writing).
453 */
454void log_tape_pos(void)
455{
456    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
457           (long) g_tape_posK >> 10);
458}
459
460
461
462
463/**
464 * Add a file to a collection of recently archived filesets/slices.
465 * The type is determined by the filename: if it contains ".afio." it is
466 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
467 * otherwise we generate a fatal_error().
468 * @param td The current @c bkpinfo->tempdir (file will be placed in <tt>td</tt>/tmpfs/backcatalog/).
469 * @param latest_fname The file to place in the collection.
470 * @return 0, always.
471 * @bug Return value is redundant.
472 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
473 */
474int maintain_collection_of_recent_archives(char *td, char *latest_fname)
475{
476    long long final_alleged_writeK, final_projected_certain_writeK,
477        final_actually_certain_writeK = 0, cposK, bufsize_K;
478    int last, curr, i;
479    t_archtype type = other;
480    char *command;
481    char *tmpdir;
482    char *old_fname;
483
484    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
485    mr_asprintf(&tmpdir, "%s/tmpfs/backcatalog", td);
486    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
487        type = fileset;
488    } else if (strstr(latest_fname, "slice")) {
489        type = biggieslice;
490    } else {
491        log_it("fname = %s", latest_fname);
492        fatal_error
493            ("Unknown type. Internal error in maintain_collection_of_recent_archives()");
494    }
495    mkdir(tmpdir, 0x700);
496    mr_asprintf(&command, "cp -f %s %s", latest_fname, tmpdir);
497    if (run_program_and_log_output(command, 6)) {
498        log_it("Warning - failed to copy %s to backcatalog at %s",
499               latest_fname, tmpdir);
500    }
501    mr_free(command);
502
503    last = g_tapecatalog->entries - 1;
504    if (last <= 0) {
505        iamhere("Too early to start deleting from collection.");
506        return (0);
507    }
508    final_alleged_writeK = g_tapecatalog->el[last].tape_posK;
509    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
510    for (curr = last; curr >= 0; curr--) {
511        cposK = g_tapecatalog->el[curr].tape_posK;
512        if (cposK < final_projected_certain_writeK) {
513            final_actually_certain_writeK = cposK;
514            break;
515        }
516    }
517    if (curr < 0) {
518        iamhere
519            ("Not far enough into tape to start deleting old archives from collection.");
520        return (0);
521    }
522//  log_it( "There are %lld KB (more than %d KB) in my backcatalog", final_alleged_writeK - final_actually_certain_writeK, bufsize_K);
523
524    for (i = curr - 1; i >= 0 && curr - i < 10; i--) {
525        mr_asprintf(&old_fname, "%s/%s", tmpdir, g_tapecatalog->el[i].fname);
526        unlink(old_fname);
527        mr_free(old_fname);
528    }
529    mr_free(tmpdir);
530    return (0);
531}
532
533
534/**
535 * Open the CD stream for input.
536 * @param bkpinfo The backup information structure. Passed to openin_tape().
537 * @return 0 for success, nonzero for failure.
538 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
539 */
540int openin_cdstream(struct s_bkpinfo *bkpinfo)
541{
542    return (openin_tape(bkpinfo));
543}
544
545
546int set_tape_block_size_with_mt(char *tapedev,
547                                long internal_tape_block_size)
548{
549    char *tmp;
550    int res;
551
552    if (strncmp(tapedev, "/dev/", 5)) {
553        log_msg(1,
554                "Not using 'mt setblk'. This isn't an actual /dev entry.");
555        return (0);
556    }
557    mr_asprintf(&tmp, "mt -f %s setblk %ld", tapedev,
558             internal_tape_block_size);
559    res = run_program_and_log_output(tmp, 3);
560    mr_free(tmp);
561    return (res);
562}
563
564
565/**
566 * Open the tape device for input.
567 * @param bkpinfo The backup information structure. Fields used:
568 * - @c bkpinfo->media_device
569 * - @c bkpinfo->tmpdir
570 * @return 0 for success, nonzero for failure.
571 * @note This will also work with a cdstream for now, but don't count on this behavior.
572 */
573int openin_tape(struct s_bkpinfo *bkpinfo)
574{
575    /*@ buffer ***************************************************** */
576    char *datablock;
577    char *tmp;
578    char old_cwd[MAX_STR_LEN];
579    char *outfname;
580    /*@ int ******************************************************* */
581    int i;
582    int j;
583    int res;
584    long length, templong;
585    size_t k;
586    int retval = 0;
587    int ctrl_chr;
588
589    /*@ long long ************************************************* */
590    long long size;
591
592    /*@ pointers ************************************************** */
593    FILE *fout;
594
595    /*@ end vars *************************************************** */
596
597    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
598    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
599        fatal_error("Cannot alloc mem for tape catalog");
600    }
601    g_tapecatalog->entries = 0;
602    g_tape_posK = 0;
603    if (g_tape_stream) {
604        log_it("FYI - I won't 'openin' the tape. It's already open.");
605        return (0);
606    }
607    insist_on_this_tape_number(1);
608    mr_asprintf(&outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
609    make_hole_for_file(outfname);
610
611    set_tape_block_size_with_mt(bkpinfo->media_device,
612                                bkpinfo->internal_tape_block_size);
613
614    log_it("Opening IN tape");
615    if (!
616        (g_tape_stream =
617         open_device_via_buffer(bkpinfo->media_device, 'r',
618                                bkpinfo->internal_tape_block_size))) {
619        log_to_screen(_("Cannot openin stream device"));
620        return (1);
621    }
622    log_to_screen(_("Reading stream"));
623    log_it("stream device = '%s'", bkpinfo->media_device);
624/* skip data disks */
625    open_evalcall_form("Skipping data disks on stream");
626    log_to_screen(_("Skipping data disks on stream"));
627    if (!(fout = fopen(outfname, "w"))) {
628        log_OS_error(outfname);
629        log_to_screen(_("Cannot openout datadisk all.tar.gz file"));
630        return (-1);
631    }
632    if (!(datablock = (char *) malloc(256 * 1024))) {
633        log_to_screen(_("Unable to malloc 256*1024"));
634        exit(1);
635    }
636    for (i = 0; i < 32; i++) {
637        for (j = 0; j < 4; j++) {
638            for (length = 0, k = 0; length < 256 * 1024; length += k) {
639                k = fread(datablock + length, 1, 256 * 1024 - length,
640                          g_tape_stream);
641            }
642            (void) fwrite(datablock, 1, (size_t) length, fout);
643            g_tape_posK += length / 1024;
644        }
645        if (i > 8)              // otherwise, 'buffer' distorts calculations
646        {
647            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
648            update_evalcall_form((int) (templong));
649        }
650    }
651    paranoid_fclose(fout);
652    mr_free(datablock);
653    /* find initial blocks */
654    res = read_header_block_from_stream(&size, NULL, &ctrl_chr);
655    retval += res;
656    if (ctrl_chr != BLK_START_OF_TAPE) {
657        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
658    }
659    res = read_header_block_from_stream(&size, NULL, &ctrl_chr);
660    retval += res;
661    if (ctrl_chr != BLK_START_OF_BACKUP) {
662        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
663    }
664    close_evalcall_form();
665    log_it("Saved all.tar.gz to '%s'", outfname);
666    (void) getcwd(old_cwd, MAX_STR_LEN);
667    chdir(bkpinfo->tmpdir);
668    mr_asprintf(&tmp, "tar -zxf %s tmp/mondo-restore.cfg 2> /dev/null",
669             outfname);
670    paranoid_system(tmp);
671    mr_free(tmp);
672    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
673    chdir(old_cwd);
674    unlink(outfname);
675    mr_free(outfname);
676    return (retval);
677}
678
679
680/**
681 * Start writing to a CD stream.
682 * @param cddev The CD device to openout via cdrecord.
683 * @param speed The speed to write at.
684 * @return 0 for success, nonzero for failure.
685 * @note This should be called only from backup processes.
686 */
687int openout_cdstream(char *cddev, int speed)
688{
689    /*@ buffers ***************************************************** */
690    char *command;
691
692    /*@ end vars *************************************************** */
693
694    /*  add 'dummy' if testing */
695    mr_asprintf(&command,
696             "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
697             cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
698    /*  initialise the catalog */
699    g_current_media_number = 1;
700    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
701        fatal_error("Cannot alloc mem for tape catalog");
702    }
703    g_tapecatalog->entries = 0;
704    /* log stuff */
705    log_it("Opening OUT cdstream with the command");
706    log_it(command);
707    /*  log_it("Let's see what happens, shall we?"); */
708    g_tape_stream = popen(command, "w");
709    mr_free(command);
710    if (g_tape_stream) {
711        return (0);
712    } else {
713        log_to_screen(_("Failed to openout to cdstream (fifo)"));
714        return (1);
715    }
716}
717
718
719/**
720 * Start writing to a tape device for the backup.
721 * @param tapedev The tape device to open for writing.
722 * @return 0 for success, nonzero for failure.
723 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
724 * EXISTING DATA on the tape!
725 */
726int openout_tape(char *tapedev, long internal_tape_block_size)
727{
728    g_current_media_number = 1;
729    if (g_tape_stream) {
730        log_it("FYI - I won't 'openout' the tape. It's already open.");
731        return (0);
732    }
733    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
734        fatal_error("Cannot alloc mem for tape catalog");
735    }
736    g_tapecatalog->entries = 0;
737    g_tape_posK = 0;
738
739    set_tape_block_size_with_mt(tapedev, internal_tape_block_size);
740    log_it("Opening OUT tape");
741    if (!
742        (g_tape_stream =
743         open_device_via_buffer(tapedev, 'w', internal_tape_block_size))) {
744        log_to_screen(_("Cannot openin stream device"));
745        return (1);
746    }
747    return (0);
748}
749
750
751/**
752 * Copy a file from the opened stream (CD or tape) to @p outfile.
753 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
754 * @param outfile The file to write to.
755 * @param size The size of the file in the input stream.
756 * @return 0 for success, nonzero for failure.
757 */
758int
759read_file_from_stream_to_file(struct s_bkpinfo *bkpinfo, char *outfile,
760                              long long size)
761{
762
763    /*@ int ******************************************************** */
764    int res;
765
766    /*@ end vars *************************************************** */
767
768    res = read_file_from_stream_FULL(bkpinfo, outfile, NULL, size);
769
770    return (res);
771}
772
773
774/**
775 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
776 * by @p fout.
777 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
778 * @param fout The stream to write the file to.
779 * @param size The size of the file in bytes.
780 * @return 0 for success, nonzero for failure.
781 */
782int
783read_file_from_stream_to_stream(struct s_bkpinfo *bkpinfo, FILE * fout,
784                                long long size)
785{
786
787    /*@ int ******************************************************** */
788    int res;
789
790    /*@ end vars *************************************************** */
791
792    res = read_file_from_stream_FULL(bkpinfo, NULL, fout, size);
793    return (res);
794}
795
796
797/**
798 * Copy a file from the currently opened stream (CD or tape) to either a
799 * @c FILE pointer indicating a currently-opened file, or a filename indicating
800 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
801 * and read_file_from_stream_to_stream() are wrappers for.
802 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
803 * @param outfname If non-NULL, write to this file.
804 * @param foutstream If non-NULL, write to this stream.
805 * @param orig_size The original length of the file in bytes.
806 * @return 0 for success, nonzero for failure.
807 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
808 */
809int
810read_file_from_stream_FULL(struct s_bkpinfo *bkpinfo, char *outfname,
811                           FILE * foutstream, long long orig_size)
812{
813    /*@ buffers ***************************************************** */
814    char *tmp;
815    char *datablock;
816    char *temp_fname = (char *)bkpinfo; /* Should NOT be NULL */
817    char *temp_cksum = (char *)bkpinfo; /* Should NOT be NULL */
818    char *actual_cksum;
819
820    /*@ int ********************************************************* */
821    int retval = 0;
822#ifdef EXTRA_TAPE_CHECKSUMS
823    int i, ch;
824#endif
825    int noof_blocks;
826    int ctrl_chr;
827    int res;
828    /*@ pointers **************************************************** */
829    FILE *fout;
830
831    /*@ long    ***************************************************** */
832    long bytes_to_write = 0;
833
834    /*@ long long *************************************************** */
835    long long temp_size, size;
836    long bytes_read, bytes_to_read;
837    long long total_read_from_tape_for_this_file = 0;
838    long long where_I_was_before_tape_change = 0;
839    /*@ unsigned int ************************************************ */
840    unsigned int crc16;
841    unsigned int crctt;
842
843    bool had_to_resync = FALSE;
844
845    /*@ init  ******************************************************* */
846    datablock = malloc(TAPE_BLOCK_SIZE);
847    crc16 = 0;
848    crctt = 0;
849    size = orig_size;
850
851    /*@ end vars *************************************************** */
852
853    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
854    if (orig_size != temp_size && orig_size != -1) {
855        mr_asprintf(&tmp,
856                 "output file's size should be %ld K but is apparently %ld K",
857                 (long) size >> 10, (long) temp_size >> 10);
858        log_to_screen(tmp);
859        mr_free(tmp);
860    }
861    if (ctrl_chr != BLK_START_FILE) {
862        wrong_marker(BLK_START_FILE, ctrl_chr);
863        return (1);
864    }
865    mr_asprintf(&tmp, "Reading file from tape; writing to '%s'; %ld KB",
866             outfname, (long) size >> 10);
867    log_to_screen(tmp);
868    mr_free(tmp);
869
870    if (foutstream) {
871        fout = foutstream;
872    } else {
873        fout = fopen(outfname, "w");
874    }
875    if (!fout) {
876        log_OS_error(outfname);
877        log_to_screen(_("Cannot openout file"));
878        return (1);
879    }
880    total_read_from_tape_for_this_file = 0;
881    for (noof_blocks = 0; size > 0;
882         noof_blocks++, size -=
883         bytes_to_write, total_read_from_tape_for_this_file +=
884         bytes_read) {
885        bytes_to_write =
886            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
887        bytes_to_read = TAPE_BLOCK_SIZE;
888        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
889        while (bytes_read < bytes_to_read) {    // next tape!
890//    crctt=crc16=0;
891            where_I_was_before_tape_change = size;
892            log_msg(4, "where_I_was_... = %lld",
893                    where_I_was_before_tape_change);
894            start_to_read_from_next_tape(bkpinfo);
895            log_msg(4, "Started reading from next tape.");
896            skip_incoming_files_until_we_find_this_one(temp_fname);
897            log_msg(4, "Skipped irrelevant files OK.");
898            for (size = orig_size; size > where_I_was_before_tape_change;
899                 size -= bytes_to_write) {
900                bytes_read =
901                    fread(datablock, 1, bytes_to_read, g_tape_stream);
902            }
903            log_msg(4, "'size' is now %lld (should be %lld)", size,
904                    where_I_was_before_tape_change);
905            log_to_screen("Successfully re-sync'd tape");
906            had_to_resync = TRUE;
907            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
908        }
909
910        (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
911
912#ifdef EXTRA_TAPE_CHECKSUMS
913        for (i = 0; i < (int) bytes_to_write; i++) {
914            ch = datablock[i];
915            crc16 = updcrcr(crc16, (unsigned) ch);
916            crctt = updcrc(crctt, (unsigned) ch);
917        }
918#endif
919    }
920    log_msg(6, "Total read from tape for this file = %lld",
921            total_read_from_tape_for_this_file);
922    log_msg(6, ".......................... Should be %lld", orig_size);
923    g_tape_posK += total_read_from_tape_for_this_file / 1024;
924    mr_asprintf(&actual_cksum, "%04x%04x", crc16, crctt);
925    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
926    } else {
927        paranoid_fclose(fout);
928    }
929    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
930    if (ctrl_chr != BLK_STOP_FILE) {
931        wrong_marker(BLK_STOP_FILE, ctrl_chr);
932//      fatal_error("Bad marker"); // return(1);
933    }
934    if (strcmp(temp_cksum, actual_cksum)) {
935        mr_asprintf(&tmp, _("actual cksum=%s; recorded cksum=%s"), actual_cksum,
936                 temp_cksum);
937        log_to_screen(tmp);
938        mr_free(tmp);
939
940        mr_asprintf(&tmp, _("%s (%ld K) is corrupt on tape"), temp_fname,
941                 (long) orig_size >> 10);
942        log_to_screen(tmp);
943        mr_free(tmp);
944        retval++;
945    }
946    mr_free(actual_cksum);
947    mr_free(datablock);
948    mr_free(temp_fname);
949    mr_free(temp_cksum);
950    return (retval);
951}
952
953
954/**
955 * Read a header block from the currently opened stream (CD or tape).
956 * This block indicates the length of the following file (if it's file-related)
957 * the filename (if it's file-related), and the block type.
958 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
959 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
960 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
961 * @return 0 for success, nonzero for failure.
962 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
963 */
964int
965read_header_block_from_stream(long long *plen, char *filename,
966                              int *pcontrol_char)
967{
968
969    /*@ buffers ***************************************************** */
970    char *tempblock;
971
972    /*@ int ********************************************************* */
973    int i, retval;
974
975    /*@ end vars *************************************************** */
976
977    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
978
979    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
980        tempblock[i] = 0;
981    }
982    while (!(*pcontrol_char = tempblock[7000])) {
983        g_tape_posK +=
984            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
985                  g_tape_stream) / 1024;
986    }
987    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
988    if (strcmp(tempblock + 6000 + *pcontrol_char, "Mondolicious, baby")) {
989        log_it("Bad header block at %ld K", (long) g_tape_posK);
990    }
991    /* the caller manages whether we should allocate or not
992     * by setting the value to NULL (do not allocate) or
993     * something (allocate) */
994    if (filename != NULL) {
995        mr_asprintf(&filename, tempblock + 1000);
996    }
997    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
998        log_to_screen("I can't verify an aborted backup.");
999        retval = 1;
1000    } else {
1001        retval = 0;
1002    }
1003    for (i = 1000; i < 1020; i++) {
1004        if (tempblock[i] < 32 || tempblock[i] > 126) {
1005            tempblock[i] = ' ';
1006        }
1007    }
1008    tempblock[i] = '\0';
1009    log_msg(6, "%s (fname=%s, size=%ld K)",
1010            marker_to_string(*pcontrol_char), tempblock + 1000,
1011            (long) (*plen) >> 10);
1012    mr_free(tempblock);
1013    return (retval);
1014}
1015
1016
1017/**
1018 * Add specified file/slice to the internal catalog of all archives written.
1019 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1020 * write the last [buffer size] MB from the catalog to the new tape, so we know
1021 * we have @e all archives on some CD/tape/whatever.
1022 * @param type The type of file we're cataloging (afioball, slice, something else)
1023 * @param number The fileset number or biggiefile number.
1024 * @param aux The slice number if it's a biggiefile, or any other additional info.
1025 * @param fn The original full pathname of the file we're recording.
1026 * @return The index of the record we just added.
1027 */
1028int register_in_tape_catalog(t_archtype type, int number, long aux,
1029                             char *fn)
1030{
1031    int last;
1032    char fname[MAX_TAPECAT_FNAME_LEN];
1033    char *p;
1034
1035    p = strrchr(fn, '/');
1036    if (p) {
1037        p++;
1038    } else {
1039        p = fn;
1040    }
1041    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1042    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1043    last = g_tapecatalog->entries;
1044    if (last >= MAX_TAPECATALOG_ENTRIES) {
1045        log_it
1046            ("Warning - can't log #%d in tape catalog - too many entries already",
1047             number);
1048        return (-1);
1049    }
1050    g_tapecatalog->el[last].type = type;
1051    g_tapecatalog->el[last].number = number;
1052    g_tapecatalog->el[last].aux = aux;
1053    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1054    strcpy(g_tapecatalog->el[last].fname, fname);
1055    g_tapecatalog->entries++;
1056    return (last);              // returns the index of the record we've jsut added
1057}
1058
1059
1060/**
1061 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1062 * (got SIGPIPE) or look like we will.
1063 * @param mediasize The size of the tape in megabytes.
1064 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1065 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1066 * autodetecting the size. Huh?
1067 */
1068
1069/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1070bool
1071should_we_write_to_next_tape(long mediasize,
1072                             off_t length_of_incoming_file)
1073{
1074    /*@ bool's ***************************************************** */
1075    bool we_need_a_new_tape = FALSE;
1076
1077    /*@ end vars *************************************************** */
1078
1079    if (mediasize == 0) {
1080        return (FALSE);
1081    }
1082    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1083        log_it("mediasize = %ld", mediasize);
1084        we_need_a_new_tape = TRUE;
1085        log_to_screen(_("Should have started a new tape/CD already"));
1086    }
1087    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1088        mediasize - (SLICE_SIZE * 4 / 1024)) {
1089        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1090               mediasize);
1091        we_need_a_new_tape = TRUE;
1092    }
1093    return (we_need_a_new_tape);
1094}
1095
1096
1097/**
1098 * Seek through the stream until we find a header block where the NAME field matches
1099 * @p the_file_I_was_reading. This is useful if you've just started reading from
1100 * a new tape and want to find the file you were reading when the tape ended.
1101 * @param the_file_I_was_reading File name to look for.
1102 * @return 0 for success, nonzero for failure.
1103 */
1104int skip_incoming_files_until_we_find_this_one(char
1105                                               *the_file_I_was_reading)
1106{
1107    char *pA;
1108    char *pB;
1109    int res;
1110    int ctrl_chr;
1111    char *temp_fname = (char *)&res;    /* should NOT be NULL */
1112    char *datablock;
1113    long long temp_size, size;
1114    long bytes_to_write;
1115
1116    datablock = malloc(TAPE_BLOCK_SIZE);
1117    pB = strrchr(the_file_I_was_reading, '/');
1118    if (pB) {
1119        pB++;
1120    } else {
1121        pB = the_file_I_was_reading;
1122    }
1123    log_msg(1, "skip_incoming_..(%s)", pB);
1124    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1125    ctrl_chr = -1;
1126    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1127        res =
1128            read_header_block_from_stream(&temp_size, temp_fname,
1129                                          &ctrl_chr);
1130        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1131            break;
1132        }
1133        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1134        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1135        log_msg(3, "Still trying to re-sync w/ tape");
1136        mr_free(temp_fname);
1137        temp_fname = (char *)&res;
1138    }
1139    while (ctrl_chr != BLK_START_FILE) {
1140        res =
1141            read_header_block_from_stream(&temp_size, temp_fname,
1142                                          &ctrl_chr);
1143        if (ctrl_chr == BLK_START_FILE) {
1144            break;
1145        }
1146        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1147        wrong_marker(BLK_START_FILE, ctrl_chr);
1148        log_msg(3, "Still trying to re-sync w/ tape");
1149        /* Do not desallocate when the while condition is met */
1150        if (ctrl_chr != BLK_START_FILE) {
1151            mr_free(temp_fname);
1152            temp_fname = (char *)&res;
1153        }
1154    }
1155    pA = strrchr(temp_fname, '/');
1156    if (pA) {
1157        pA++;
1158    } else {
1159        pA = temp_fname;
1160    }
1161    pB = strrchr(the_file_I_was_reading, '/');
1162    if (pB) {
1163        pB++;
1164    } else {
1165        pB = the_file_I_was_reading;
1166    }
1167    while (strcmp(pA, pB)) {
1168        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1169                the_file_I_was_reading);
1170        for (size = temp_size; size > 0; size -= bytes_to_write) {
1171            bytes_to_write =
1172                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1173            // FIXME - needs error-checking and -catching
1174            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1175        }
1176
1177        mr_free(temp_fname);
1178        temp_fname = (char *)&res;
1179        res = read_header_block_from_stream(&temp_size, NULL, &ctrl_chr);
1180        if (ctrl_chr != BLK_STOP_FILE) {
1181            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1182        }
1183        res = read_header_block_from_stream(&temp_size, NULL, &ctrl_chr);
1184        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1185            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1186        }
1187        res = read_header_block_from_stream(&temp_size, NULL, &ctrl_chr);
1188        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1189            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1190        }
1191        res =
1192            read_header_block_from_stream(&temp_size, temp_fname,
1193                                          &ctrl_chr);
1194        if (ctrl_chr != BLK_START_FILE) {
1195            wrong_marker(BLK_START_FILE, ctrl_chr);
1196        }
1197        pA = strrchr(temp_fname, '/');
1198        if (pA) {
1199            pA++;
1200        } else {
1201            pA = temp_fname;
1202        }
1203        /* BERLIOS: useless ?
1204           pB = strrchr(the_file_I_was_reading, '/');
1205           if (pB) {
1206           pB++;
1207           } else {
1208           pB = the_file_I_was_reading;
1209           }
1210         */
1211    }
1212    log_msg(2, "Reading %s (it matches %s)", temp_fname,
1213            the_file_I_was_reading);
1214    mr_free(temp_fname);
1215    mr_free(datablock);
1216    return (0);
1217}
1218
1219
1220/**
1221 * Start to read from the next tape. Assumes the user has already inserted it.
1222 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1223 * @return 0 for success, nonzero for failure.
1224 */
1225int start_to_read_from_next_tape(struct s_bkpinfo *bkpinfo)
1226{
1227    /*@ int ********************************************************* */
1228    int res = 0;
1229    int ctrlchr;
1230    long long temp_size;
1231    /*@ end vars *************************************************** */
1232
1233    paranoid_pclose(g_tape_stream);
1234    sync();
1235    sync();
1236    sync();
1237    log_it("Next tape requested.");
1238    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1239    log_it("Opening IN the next tape");
1240    if (!
1241        (g_tape_stream =
1242         open_device_via_buffer(bkpinfo->media_device, 'r',
1243                                bkpinfo->internal_tape_block_size))) {
1244        log_to_screen(_("Cannot openin stream device"));
1245        return (1);
1246    }
1247    g_tape_posK = 0;
1248    g_sigpipe = FALSE;
1249    res += read_header_block_from_stream(&temp_size, NULL, &ctrlchr);   /* just in case */
1250    if (ctrlchr != BLK_START_OF_TAPE) {
1251        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1252    }
1253    res += read_header_block_from_stream(&temp_size, NULL, &ctrlchr);   /* just in case */
1254    if (ctrlchr != BLK_START_OF_BACKUP) {
1255        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1256    } else {
1257        log_msg(3, "Next tape opened OK. Whoopee!");
1258    }
1259    return (res);
1260}
1261
1262
1263/**
1264 * Start to write to the next tape. Assume the user has already inserted it.
1265 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1266 * @return 0 for success, nonzero for failure.
1267 */
1268int start_to_write_to_next_tape(struct s_bkpinfo *bkpinfo)
1269{
1270    int res = 0;
1271    char *command;
1272
1273    paranoid_pclose(g_tape_stream);
1274    sync();
1275    sync();
1276    sync();
1277    log_it("New tape requested.");
1278    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1279    if (g_current_media_number > MAX_NOOF_MEDIA) {
1280        res++;
1281        log_to_screen(_("Too many tapes. Man, you need to use nfs!"));
1282    }
1283    if (bkpinfo->backup_media_type == cdstream) {
1284        mr_asprintf(&command,
1285                 "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1286                 bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE,
1287                 MONDO_LOGFILE);
1288        log_it("Opening OUT to next CD with the command");
1289        log_it(command);
1290        log_it("Let's see what happens, shall we?");
1291        g_tape_stream = popen(command, "w");
1292        mr_free(command);
1293        if (!g_tape_stream) {
1294            log_to_screen(_("Failed to openout to cdstream (fifo)"));
1295            return (1);
1296        }
1297    } else {
1298        log_it("Opening OUT to next tape");
1299        if (!
1300            (g_tape_stream =
1301             open_device_via_buffer(bkpinfo->media_device, 'w',
1302                                    bkpinfo->internal_tape_block_size))) {
1303            log_to_screen(_("Cannot openin stream device"));
1304            return (1);
1305        }
1306    }
1307    g_tape_posK = 0;
1308    g_sigpipe = FALSE;
1309    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1310    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1311    return (res);
1312}
1313
1314
1315/**
1316 * Write a bufferfull of the most recent archives to the tape. The
1317 * rationale behind this is a bit complex. If the previous tape ended
1318 * suddenly (EOF or otherwise) some archives were probably left in the
1319 * buffer. That means that Mondo thinks they have been written, but
1320 * the external binary @c buffer has not actually written them. So to
1321 * be safe, we start the new tape by writing the last bufferfull from
1322 * the old one. This insures that all archives will be on at least
1323 * one tape. Sounds inelegant, but it works.
1324 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1325 * @return 0 for success, nonzero for failure.
1326 */
1327int write_backcatalog_to_tape(struct s_bkpinfo *bkpinfo)
1328{
1329    int i, last, res = 0;
1330    char *fname;
1331
1332    log_msg(2, "I am now writing back catalog to tape");
1333    last = g_tapecatalog->entries - 1;
1334    for (i = 0; i <= last; i++) {
1335        mr_asprintf(&fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir,
1336                 g_tapecatalog->el[i].fname);
1337        if (!does_file_exist(fname)) {
1338            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1339        } else {
1340            write_header_block_to_stream(length_of_file(fname),
1341                                         "start-backcatalog-afio-or-slice",
1342                                         BLK_START_AN_AFIO_OR_SLICE);
1343            log_msg(2, "Writing %s", fname);
1344            if (write_file_to_stream_from_file(bkpinfo, fname)) {
1345                res++;
1346                log_msg(2, "%s failed", fname);
1347            }
1348            if (i != last) {
1349                write_header_block_to_stream((off_t)0,
1350                                             "stop-backcatalog-afio-or-slice",
1351                                             BLK_STOP_AN_AFIO_OR_SLICE);
1352            }
1353        }
1354        mr_free(fname);
1355    }
1356    log_msg(2, "Finished writing back catalog to tape");
1357    return (res);
1358}
1359
1360
1361/**
1362 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1363 * @param fname The path to all.tar.gz.
1364 * @return 0 for success, nonzero for failure.
1365 */
1366int write_data_disks_to_stream(char *fname)
1367{
1368    /*@ pointers *************************************************** */
1369    FILE *fin;
1370    char *tmp;
1371
1372    /*@ long ******************************************************* */
1373    long m = -1;
1374    long templong;
1375
1376    /*@ int ******************************************************** */
1377    int i, j;
1378
1379    /*@ buffers **************************************************** */
1380    char tempblock[256 * 1024];
1381
1382    /*@ end vars *************************************************** */
1383
1384    open_evalcall_form(_("Writing data disks to tape"));
1385    log_to_screen(_("Writing data disks to tape"));
1386    log_it("Data disks = %s", fname);
1387    if (!does_file_exist(fname)) {
1388        mr_asprintf(&tmp, _("Cannot find %s"), fname);
1389        log_to_screen(tmp);
1390        mr_free(tmp);
1391        return (1);
1392    }
1393    if (!(fin = fopen(fname, "r"))) {
1394        log_OS_error(fname);
1395        fatal_error("Cannot openin the data disk");
1396    }
1397    for (i = 0; i < 32; i++) {  /* 32MB */
1398        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1399            if (!feof(fin)) {
1400                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1401            } else {
1402                m = 0;
1403            }
1404            for (; m < 256 * 1024; m++) {
1405                tempblock[m] = '\0';
1406            }
1407            g_tape_posK +=
1408                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1409        }
1410        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1411        {
1412            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1413            update_evalcall_form((int) (templong));
1414        }
1415    }
1416    paranoid_fclose(fin);
1417    close_evalcall_form();
1418    return (0);
1419}
1420
1421
1422/**
1423 * Copy @p infile to the opened stream (CD or tape).
1424 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1425 * @param infile The file to write to the stream.
1426 * @return 0 for success, nonzero for failure.
1427 */
1428int write_file_to_stream_from_file(struct s_bkpinfo *bkpinfo, char *infile)
1429{
1430    /*@ buffers **************************************************** */
1431    char *tmp;
1432    char datablock[TAPE_BLOCK_SIZE];
1433    char *checksum;
1434    char *infile_basename;
1435
1436    /*@ int ******************************************************** */
1437    int retval = 0;
1438    int noof_blocks;
1439
1440    /*  unsigned int ch; */
1441    unsigned int crc16;
1442    unsigned int crctt;
1443
1444    /*@ pointers *************************************************** */
1445    FILE *fin;
1446    char *p;
1447
1448    /*@ long ******************************************************* */
1449    long bytes_to_read = 0;
1450    long i;
1451
1452    off_t filesize;
1453
1454#ifdef EXTRA_TAPE_CHECKSUMS
1455    int ch;
1456#endif
1457
1458    /*@ initialize ************************************************ */
1459    crc16 = 0;
1460    crctt = 0;
1461
1462    /*@ end vars *************************************************** */
1463
1464    infile_basename = strrchr(infile, '/');
1465    if (infile_basename) {
1466        infile_basename++;
1467    } else {
1468        infile_basename = infile;
1469    }
1470    filesize = length_of_file(infile);
1471    if (should_we_write_to_next_tape
1472        (bkpinfo->media_size[g_current_media_number], filesize)) {
1473        start_to_write_to_next_tape(bkpinfo);
1474        write_backcatalog_to_tape(bkpinfo);
1475    }
1476    p = strrchr(infile, '/');
1477    if (!p) {
1478        p = infile;
1479    } else {
1480        p++;
1481    }
1482    mr_asprintf(&tmp, "Writing file '%s' to tape (%ld KB)", p,
1483             (long) filesize >> 10);
1484    log_it(tmp);
1485    mr_free(tmp);
1486
1487    write_header_block_to_stream(filesize, infile_basename,
1488                                 BLK_START_FILE);
1489//go_here_to_restart_saving_of_file:
1490    if (!(fin = fopen(infile, "r"))) {
1491        log_OS_error(infile);
1492        return (1);
1493    }
1494    for (noof_blocks = 0; filesize > 0;
1495         noof_blocks++, filesize -= bytes_to_read) {
1496        if (filesize < TAPE_BLOCK_SIZE) {
1497            bytes_to_read = (long) filesize;
1498            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1499                datablock[i] = '\0';
1500            }
1501        } else {
1502            bytes_to_read = TAPE_BLOCK_SIZE;
1503        }
1504        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1505        g_tape_posK += fwrite(datablock, 1, /*bytes_to_read */
1506                              (size_t) TAPE_BLOCK_SIZE,
1507                              g_tape_stream) / 1024;
1508        if (g_sigpipe) {
1509            iamhere("Sigpipe occurred recently. I'll start a new tape.");
1510            fclose(fin);
1511            g_sigpipe = FALSE;
1512            start_to_write_to_next_tape(bkpinfo);
1513            write_backcatalog_to_tape(bkpinfo); // kinda-sorta recursive :)
1514            return (0);
1515        }
1516#ifdef EXTRA_TAPE_CHECKSUMS
1517        for (i = 0; i < bytes_to_read; i++) {
1518            ch = datablock[i];
1519            crc16 = updcrcr(crc16, (unsigned) ch);
1520            crctt = updcrc(crctt, (unsigned) ch);
1521        }
1522#endif
1523    }
1524    paranoid_fclose(fin);
1525    mr_asprintf(&checksum, "%04x%04x", crc16, crctt);
1526    /* BERLIOS: what does it do ??? */
1527    write_header_block_to_stream((off_t)g_current_media_number, checksum,
1528                                 BLK_STOP_FILE);
1529    mr_free(checksum);
1530//  log_it("File '%s' written to tape.", infile);
1531    return (retval);
1532}
1533
1534
1535/**
1536 * Write a header block to the opened stream (CD or tape).
1537 * @param length_of_incoming_file The length to store in the header block.
1538 * Usually matters only if this is a file-related header, in which case it should
1539 * be the length of the file that will follow.
1540 * @param filename The filename to store in the header block. Usually matters
1541 * only if this is a file-related header, in which case this should be the name
1542 * if the file that will follow.
1543 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1544 * @return 0 for success, nonzero for failure.
1545 */
1546int
1547write_header_block_to_stream(off_t length_of_incoming_file,
1548                             char *filename, int control_char)
1549{
1550    /*@ buffers **************************************************** */
1551    char tempblock[TAPE_BLOCK_SIZE];
1552    char *tmp;
1553    char *p;
1554
1555    /*@ int ******************************************************** */
1556    int i;
1557
1558    off_t olen;
1559
1560    /*@ end vars *************************************************** */
1561
1562
1563    olen = length_of_incoming_file;
1564    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1565    if (!p) {
1566        p = filename;
1567    } else {
1568        p++;
1569    }
1570    if (!g_tape_stream) {
1571        log_to_screen
1572            (_("You're not backing up to tape. Why write a tape header?"));
1573        return (1);
1574    }
1575    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1576        tempblock[i] = 0;
1577    }
1578    sprintf(tempblock + 6000 + control_char, "Mondolicious, baby");
1579    tempblock[7000] = control_char;
1580    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1581    strcpy(tempblock + 1000, filename);
1582    g_tape_posK +=
1583        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1584               g_tape_stream) / 1024;
1585    mr_asprintf(&tmp, "%s (fname=%s, size=%ld K)",
1586             marker_to_string(control_char), p,
1587             (long) length_of_incoming_file >> 10);
1588    log_msg(6, tmp);
1589    mr_free(tmp);
1590    return (0);
1591}
1592
1593
1594/**
1595 * Log (to screen) an erroneous marker, along with what it should have been.
1596 * @param should_be What we were expecting.
1597 * @param it_is What we got.
1598 */
1599void wrong_marker(int should_be, int it_is)
1600{
1601    /*@ buffer ***************************************************** */
1602    char *tmp;
1603
1604
1605    /*@ end vars *************************************************** */
1606    mr_asprintf(&tmp, _("Wrong marker! (Should be %s, is actually %s)"),
1607             marker_to_string(should_be), marker_to_string(it_is));
1608    log_to_screen(tmp);
1609    mr_free(tmp);
1610}
1611
1612/* @} - end of streamGroup */
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