source: trunk/mondo/mondo/common/libmondo-stream.c @ 122

Last change on this file since 122 was 122, checked in by bcornec, 14 years ago

memory management going on (libmondo-verify.c, libmondo-devices.c, libmondo-string.c, libmondo-stream.c)

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1/* $Id: libmondo-stream.c 122 2005-11-14 23:01:12Z bcornec $
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 "my-stuff.h"
13#include "mondostructures.h"
14#include "libmondo-devices.h"
15#include "lib-common-externs.h"
16#include "libmondo-stream.h"
17#include "libmondo-string-EXT.h"
18#include "libmondo-files-EXT.h"
19#include "libmondo-gui-EXT.h"
20#include "libmondo-fork-EXT.h"
21#include "libmondo-tools-EXT.h"
22#include "libmondo-fifo-EXT.h"
23
24#define EXTRA_TAPE_CHECKSUMS
25
26/*@unused@*/
27//static char cvsid[] = "$Id: libmondo-stream.c 122 2005-11-14 23:01:12Z bcornec $";
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    paranoid_system("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    paranoid_free(blk);
130    paranoid_free(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    paranoid_system("sync");
156    sleep(1);
157    log_it("closeout_tape() -- entering");
158    retval +=
159        write_header_block_to_stream(0, "end-of-backup",
160                                     BLK_END_OF_BACKUP);
161    retval += write_header_block_to_stream(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], 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    paranoid_free(blk);
184    paranoid_free(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    asprintf(&command, "mt -f %s status", dev);
196    res = run_program_and_log_output(command, 1);
197    paranoid_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")
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;
217    char *command;
218    char *cdr_exe;
219    int res;
220
221    log_to_screen("I am looking for your tape streamer. Please wait.");
222    dev[0] = siz[0] = '\0';
223    if (find_home_of_exe("cdrecord")) {
224        asprintf(&cdr_exe, "cdrecord");
225    } else {
226        asprintf(&cdr_exe, "dvdrecord");
227    }
228    asprintf(&command, "%s -scanbus 2> /dev/null | grep -i tape | wc -l",
229            cdr_exe);
230    asprintf(&tmp, call_program_and_get_last_line_of_output(command));
231    paranoid_free(command);
232
233    if (atoi(tmp) != 1) {
234        log_it
235            ("Either too few or too many tape streamers for me to detect...");
236        strcpy(dev, VANILLA_SCSI_TAPE);
237        return 1;
238    }
239    paranoid_free(tmp);
240
241    asprintf(&command,
242            "%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",
243            cdr_exe);
244    asprintf(&tmp, call_program_and_get_last_line_of_output(command));
245    paranoid_free(command);
246    if (strlen(tmp) < 2) {
247        log_it("Could not find tape device");
248        return 1;
249    }
250    paranoid_free(tmp);
251
252    asprintf(&command,
253            "%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",
254            cdr_exe);
255    paranoid_free(cdr_exe);
256
257    asprintf(&tmp, call_program_and_get_last_line_of_output(command));
258    paranoid_free(command);
259    strcpy(dev, VANILLA_SCSI_TAPE);
260    dev[strlen(dev) - 1] = '\0';
261    strcat(dev, tmp);           // e.g. '/dev/st0' becomes '/dev/stN'
262    paranoid_free(tmp);
263
264    res = 0;
265    if (!mt_says_tape_exists(dev)) {
266        strcpy(dev, ALT_TAPE);
267        if (!mt_says_tape_exists(dev)) {
268            log_it("Cannot openin %s", dev);
269            strcpy(dev, "/dev/st0");
270            if (!mt_says_tape_exists(dev)) {
271                log_it("Cannot openin %s", dev);
272                strcpy(dev, "/dev/osst0");
273                if (!mt_says_tape_exists(dev)) {
274                    res++;
275                } else {
276                    res = 0;
277                }
278            }
279        }
280    }
281
282    log_it("At this point, dev = %s and res = %d", dev, res);
283
284    asprintf(&tmp, call_program_and_get_last_line_of_output("\
285cdrecord -scanbus 2> /dev/null | tr -s '\t' ' ' | \
286grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | \
287awk '{for(i=1; i<NF; i++) { if (index($i, \"GB\")>0) { print $i;};};};'"));
288
289    if (mt_says_tape_exists(dev)) {
290        res = 0;
291    } else {
292        log_it("Turning %s", dev);
293        paranoid_free(tmp);
294        asprintf(&tmp, (strrchr(dev, '/') != NULL) ? strrchr(dev, '/') : dev);
295        sprintf(dev, "/dev/os%s", tmp);
296        log_it("...into %s", dev);
297        if (mt_says_tape_exists(dev)) {
298            res = 0;
299        } else {
300            res++;
301        }
302    }
303
304    siz[0] = '\0';
305    log_it("res=%d; dev=%s", res, dev);
306
307    if (res) {
308        return (res);
309    }
310
311    if (strlen(tmp) < 2) {
312        siz[0] = '\0';
313        log_it("Warning - size of tape unknown");
314        return (0);
315    } else {
316        strcpy(siz, tmp);
317        return (0);
318    }
319    paranoid_free(tmp);
320}
321
322int read_EXAT_files_from_tape(struct s_bkpinfo *bkpinfo,
323                              long long *ptmp_size, char *tmp_fname,
324                              int *pctrl_chr, char *xattr_fname,
325                              char *acl_fname)
326{
327    int res = 0;
328    int retval = 0;
329    char *fname = &res;     /* Should NOT be NULL */
330
331// xattr
332    res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
333    if (*pctrl_chr != BLK_START_EXAT_FILE) {
334        wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
335    }
336    if (!strstr(fname, "xattr")) {
337        fatal_error("Wrong order, sunshine.");
338    }
339    paranoid_free(fname);
340    fname = &res;
341    read_file_from_stream_to_file(bkpinfo, xattr_fname, *ptmp_size);
342    res = read_header_block_from_stream(ptmp_size, NULL, pctrl_chr);
343    if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
344        wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
345    }
346    // acl
347    res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
348    if (!strstr(fname, "acl")) {
349        fatal_error("Wrong order, sunshine.");
350    }
351    paranoid_free(fname);
352    fname = &res;
353    if (*pctrl_chr != BLK_START_EXAT_FILE) {
354        wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
355    }
356    read_file_from_stream_to_file(bkpinfo, acl_fname, *ptmp_size);
357    res = read_header_block_from_stream(ptmp_size, NULL, pctrl_chr);
358    if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
359        wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
360    }
361    res = read_header_block_from_stream(ptmp_size, NULL, pctrl_chr);
362    if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
363        wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
364    }
365    // tarball itself
366    res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
367    log_msg(1, "Got xattr and acl; now looking for afioball");
368    tmp_fname = fname;
369    return (retval);
370}
371
372
373int write_EXAT_files_to_tape(struct s_bkpinfo *bkpinfo, char *xattr_fname,
374                             char *acl_fname)
375{
376    int res = 0;
377    // EXATs
378    write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
379                                 BLK_START_EXTENDED_ATTRIBUTES);
380    // xattr
381    write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
382                                 BLK_START_EXAT_FILE);
383    write_file_to_stream_from_file(bkpinfo, xattr_fname);
384    write_header_block_to_stream(-1, xattr_fname, BLK_STOP_EXAT_FILE);
385// acl
386    write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
387                                 BLK_START_EXAT_FILE);
388    write_file_to_stream_from_file(bkpinfo, acl_fname);
389    write_header_block_to_stream(-1, acl_fname, BLK_STOP_EXAT_FILE);
390    write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
391                                 BLK_STOP_EXTENDED_ATTRIBUTES);
392    return (res);
393}
394
395
396
397
398/**
399 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
400 * @param tapeno The tape number to insist on.
401 * @bug There is currently no way to actually verify that the user has actually
402 * inserted the right tape.
403 */
404void insist_on_this_tape_number(int tapeno)
405{
406    int i;
407    char *tmp;
408
409    log_it("Insisting on tape #%d", tapeno);
410    if (g_current_media_number != tapeno) {
411        //      log_it("g_current_media_number = %d", g_current_media_number);
412        asprintf(&tmp,
413                "When the tape drive goes quiet, please insert volume %d in this series.",
414                tapeno);
415        popup_and_OK(tmp);
416        paranoid_free(tmp);
417        open_evalcall_form("Waiting while the tape drive settles");
418    } else {
419        open_evalcall_form("Waiting while the tape drive rewinds");
420    }
421
422    for (i = 0; i <= 100; i += 2) {
423        usleep(100000);
424        update_evalcall_form(i);
425    }
426    close_evalcall_form();
427    log_it("I assume user has inserted it. They _say_ they have...");
428    g_current_media_number = tapeno;
429
430    //  log_it("g_current_media_number = %d", g_current_media_number);
431    log_it("OK, I've finished insisting. On with the revelry.");
432}
433
434
435/**
436 * Debugging aid - log the offset we're at on the tape (reading or writing).
437 */
438void log_tape_pos(void)
439{
440    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
441           (long) g_tape_posK >> 10);
442}
443
444
445
446
447/**
448 * Add a file to a collection of recently archived filesets/slices.
449 * The type is determined by the filename: if it contains ".afio." it is
450 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
451 * otherwise we generate a fatal_error().
452 * @param td The current @c bkpinfo->tempdir (file will be placed in <tt>td</tt>/tmpfs/backcatalog/).
453 * @param latest_fname The file to place in the collection.
454 * @return 0, always.
455 * @bug Return value is redundant.
456 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
457 */
458int maintain_collection_of_recent_archives(char *td, char *latest_fname)
459{
460    long long final_alleged_writeK, final_projected_certain_writeK,
461        final_actually_certain_writeK = 0, cposK, bufsize_K;
462    int last, curr, i;
463    t_archtype type = other;
464    char *command;
465    char *tmpdir;
466    char *old_fname;
467    char *p;
468    /* BERLIOS: useless
469    char suffix[16];
470    */
471
472    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
473    asprintf(&tmpdir, "%s/tmpfs/backcatalog", td);
474    /* BERLIOS: useless
475    if ((p = strrchr(latest_fname, '.'))) {
476        strcpy(suffix, ++p);
477    } else {
478        suffix[0] = '\0';
479    }
480    */
481    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
482        type = fileset;
483    } else if (strstr(latest_fname, "slice")) {
484        type = biggieslice;
485    } else {
486        log_it("fname = %s", latest_fname);
487        fatal_error
488            ("Unknown type. Internal error in maintain_collection_of_recent_archives()");
489    }
490    mkdir(tmpdir, 0x700);
491    asprintf(&command, "cp -f %s %s", latest_fname, tmpdir);
492    if (run_program_and_log_output(command, 6)) {
493        log_it("Warning - failed to copy %s to backcatalog at %s",
494               latest_fname, tmpdir);
495    }
496    paranoid_free(command);
497
498    last = g_tapecatalog->entries - 1;
499    if (last <= 0) {
500        iamhere("Too early to start deleting from collection.");
501        return (0);
502    }
503    final_alleged_writeK = g_tapecatalog->el[last].tape_posK;
504    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
505    for (curr = last; curr >= 0; curr--) {
506        cposK = g_tapecatalog->el[curr].tape_posK;
507        if (cposK < final_projected_certain_writeK) {
508            final_actually_certain_writeK = cposK;
509            break;
510        }
511    }
512    if (curr < 0) {
513        iamhere
514            ("Not far enough into tape to start deleting old archives from collection.");
515        return (0);
516    }
517//  log_it( "There are %lld KB (more than %d KB) in my backcatalog", final_alleged_writeK - final_actually_certain_writeK, bufsize_K);
518
519    for (i = curr - 1; i >= 0 && curr - i < 10; i--) {
520        asprintf(&old_fname, "%s/%s", tmpdir, g_tapecatalog->el[i].fname);
521        unlink(old_fname);
522        paranoid_free(old_fname);
523    }
524    paranoid_free(tmpdir);
525    return (0);
526}
527
528
529/**
530 * Open the CD stream for input.
531 * @param bkpinfo The backup information structure. Passed to openin_tape().
532 * @return 0 for success, nonzero for failure.
533 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
534 */
535int openin_cdstream(struct s_bkpinfo *bkpinfo)
536{
537    return (openin_tape(bkpinfo));
538}
539
540
541/**
542 * FIFO used to read/write to the tape device.
543 * @bug This seems obsolete now that we call an external @c buffer program. Please look onto this.
544 */
545char g_tape_fifo[MAX_STR_LEN];
546
547int set_tape_block_size_with_mt(char *tapedev,
548                                long internal_tape_block_size)
549{
550    char *tmp;
551    int res;
552
553    if (strncmp(tapedev, "/dev/", 5)) {
554        log_msg(1,
555                "Not using 'mt setblk'. This isn't an actual /dev entry.");
556        return (0);
557    }
558    asprintf(&tmp, "mt -f %s setblk %ld", tapedev, internal_tape_block_size);
559    res = run_program_and_log_output(tmp, 3);
560    paranoid_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    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//  start_buffer_process( bkpinfo->media_device, g_tape_fifo, FALSE);
615    log_it("Opening IN tape");
616    if (!
617        (g_tape_stream =
618         open_device_via_buffer(bkpinfo->media_device, 'r',
619                                bkpinfo->internal_tape_block_size))) {
620        log_OS_error(g_tape_fifo);
621        log_to_screen("Cannot openin stream device");
622        return (1);
623    }
624    log_to_screen("Reading stream");
625    log_it("stream device = '%s'", bkpinfo->media_device);
626/* skip data disks */
627    open_evalcall_form("Skipping data disks on stream");
628    log_to_screen("Skipping data disks on stream");
629    if (!(fout = fopen(outfname, "w"))) {
630        log_OS_error(outfname);
631        log_to_screen("Cannot openout datadisk all.tar.gz file");
632        return (-1);
633    }
634    if (!(datablock = (char *) malloc(256 * 1024))) {
635        log_to_screen("Unable to malloc 256*1024");
636        exit(1);
637    }
638    for (i = 0; i < 32; i++) {
639        for (j = 0; j < 4; j++) {
640            for (length = 0, k = 0; length < 256 * 1024; length += k) {
641                k = fread(datablock + length, 1, 256 * 1024 - length,
642                          g_tape_stream);
643            }
644            (void) fwrite(datablock, 1, (size_t) length, fout);
645            g_tape_posK += length / 1024;
646        }
647        if (i > 8)              // otherwise, 'buffer' distorts calculations
648        {
649            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
650            update_evalcall_form((int) (templong));
651        }
652    }
653    paranoid_fclose(fout);
654    paranoid_free(datablock);
655    /* find initial blocks */
656    res = read_header_block_from_stream(&size, NULL, &ctrl_chr);
657    retval += res;
658    if (ctrl_chr != BLK_START_OF_TAPE) {
659        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
660    }
661    res = read_header_block_from_stream(&size, NULL, &ctrl_chr);
662    retval += res;
663    if (ctrl_chr != BLK_START_OF_BACKUP) {
664        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
665    }
666    close_evalcall_form();
667    log_it("Saved all.tar.gz to '%s'", outfname);
668    (void) getcwd(old_cwd, MAX_STR_LEN);
669    chdir(bkpinfo->tmpdir);
670    asprintf(&tmp, "tar -zxf %s tmp/mondo-restore.cfg 2> /dev/null",
671            outfname);
672    paranoid_system(tmp);
673    paranoid_free(tmp);
674    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
675    chdir(old_cwd);
676    unlink(outfname);
677    paranoid_free(outfname);
678    return (retval);
679}
680
681
682/**
683 * Start writing to a CD stream.
684 * @param cddev The CD device to openout via cdrecord.
685 * @param speed The speed to write at.
686 * @return 0 for success, nonzero for failure.
687 * @note This should be called only from backup processes.
688 */
689int openout_cdstream(char *cddev, int speed)
690{
691    /*@ buffers ***************************************************** */
692    char command;
693
694    /*@ end vars *************************************************** */
695
696    /*  add 'dummy' if testing */
697    asprintf(&command,
698            "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
699            cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
700    /*  initialise the catalog */
701    g_current_media_number = 1;
702    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
703        fatal_error("Cannot alloc mem for tape catalog");
704    }
705    g_tapecatalog->entries = 0;
706    /* log stuff */
707    log_it("Opening OUT cdstream with the command");
708    log_it(command);
709    /*  log_it("Let's see what happens, shall we?"); */
710    g_tape_stream = popen(command, "w");
711    paranoid_free(command);
712    if (g_tape_stream) {
713        return (0);
714    } else {
715        log_to_screen("Failed to openout to cdstream (fifo)");
716        return (1);
717    }
718}
719
720
721/**
722 * Start writing to a tape device for the backup.
723 * @param tapedev The tape device to open for writing.
724 * @return 0 for success, nonzero for failure.
725 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
726 * EXISTING DATA on the tape!
727 */
728int openout_tape(char *tapedev, long internal_tape_block_size)
729{
730    g_current_media_number = 1;
731    if (g_tape_stream) {
732        log_it("FYI - I won't 'openout' the tape. It's already open.");
733        return (0);
734    }
735    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
736        fatal_error("Cannot alloc mem for tape catalog");
737    }
738    g_tapecatalog->entries = 0;
739    g_tape_posK = 0;
740
741    set_tape_block_size_with_mt(tapedev, internal_tape_block_size);
742    log_it("Opening OUT tape");
743    if (!
744        (g_tape_stream =
745         open_device_via_buffer(tapedev, 'w', internal_tape_block_size))) {
746        log_OS_error(g_tape_fifo);
747        log_to_screen("Cannot openin stream device");
748        return (1);
749    }
750    return (0);
751}
752
753
754/**
755 * Copy a file from the opened stream (CD or tape) to @p outfile.
756 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
757 * @param outfile The file to write to.
758 * @param size The size of the file in the input stream.
759 * @return 0 for success, nonzero for failure.
760 */
761int
762read_file_from_stream_to_file(struct s_bkpinfo *bkpinfo, char *outfile,
763                              long long size)
764{
765
766    /*@ int ******************************************************** */
767    int res;
768
769    /*@ end vars *************************************************** */
770
771    res = read_file_from_stream_FULL(bkpinfo, outfile, NULL, size);
772
773    return (res);
774}
775
776
777/**
778 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
779 * by @p fout.
780 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
781 * @param fout The stream to write the file to.
782 * @param size The size of the file in bytes.
783 * @return 0 for success, nonzero for failure.
784 */
785int
786read_file_from_stream_to_stream(struct s_bkpinfo *bkpinfo, FILE * fout,
787                                long long size)
788{
789
790    /*@ int ******************************************************** */
791    int res;
792
793    /*@ end vars *************************************************** */
794
795    res = read_file_from_stream_FULL(bkpinfo, NULL, fout, size);
796    return (res);
797}
798
799
800/**
801 * Copy a file from the currently opened stream (CD or tape) to either a
802 * @c FILE pointer indicating a currently-opened file, or a filename indicating
803 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
804 * and read_file_from_stream_to_stream() are wrappers for.
805 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
806 * @param outfname If non-NULL, write to this file.
807 * @param foutstream If non-NULL, write to this stream.
808 * @param orig_size The original length of the file in bytes.
809 * @return 0 for success, nonzero for failure.
810 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
811 */
812int
813read_file_from_stream_FULL(struct s_bkpinfo *bkpinfo, char *outfname,
814                           FILE * foutstream, long long orig_size)
815{
816    /*@ buffers ***************************************************** */
817    char *tmp;
818    char *datablock;
819    char *temp_fname = bkpinfo;     /* Should NOT be NULL */
820    char *temp_cksum = bkpinfo;     /* Should NOT be NULL */
821    char *actual_cksum;
822
823    /*@ int ********************************************************* */
824    int retval = 0;
825#ifdef EXTRA_TAPE_CHECKSUMS
826    int i, ch;
827#endif
828    int noof_blocks;
829    int ctrl_chr;
830    int res;
831    /*@ pointers **************************************************** */
832    FILE *fout;
833
834    /*@ long    ***************************************************** */
835    long bytes_to_write = 0;
836
837    /*@ long long *************************************************** */
838    long long temp_size, size;
839    long bytes_read, bytes_to_read;
840    long long total_read_from_tape_for_this_file = 0;
841    long long where_I_was_before_tape_change = 0;
842    /*@ unsigned int ************************************************ */
843    unsigned int crc16;
844    unsigned int crctt;
845
846    bool had_to_resync = FALSE;
847
848    /*@ init  ******************************************************* */
849    datablock = malloc(TAPE_BLOCK_SIZE);
850    crc16 = 0;
851    crctt = 0;
852    size = orig_size;
853
854    /*@ end vars *************************************************** */
855
856    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
857    if (orig_size != temp_size && orig_size != -1) {
858        asprintf(&tmp,
859                "output file's size should be %ld K but is apparently %ld K",
860                (long) size >> 10, (long) temp_size >> 10);
861        log_to_screen(tmp);
862        paranoid_free(tmp);
863    }
864    if (ctrl_chr != BLK_START_FILE) {
865        wrong_marker(BLK_START_FILE, ctrl_chr);
866        return (1);
867    }
868    asprintf(&tmp, "Reading file from tape; writing to '%s'; %ld KB",
869            outfname, (long) size >> 10);
870    log_to_screen(tmp);
871    paranoid_free(tmp);
872
873    if (foutstream) {
874        fout = foutstream;
875    } else {
876        fout = fopen(outfname, "w");
877    }
878    if (!fout) {
879        log_OS_error(outfname);
880        log_to_screen("Cannot openout file");
881        return (1);
882    }
883    total_read_from_tape_for_this_file = 0;
884    for (noof_blocks = 0; size > 0;
885         noof_blocks++, size -=
886         bytes_to_write, total_read_from_tape_for_this_file +=
887         bytes_read) {
888        bytes_to_write =
889            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
890        bytes_to_read = TAPE_BLOCK_SIZE;
891        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
892        while (bytes_read < bytes_to_read) {    // next tape!
893//    crctt=crc16=0;
894            where_I_was_before_tape_change = size;
895            log_msg(4, "where_I_was_... = %lld",
896                    where_I_was_before_tape_change);
897            start_to_read_from_next_tape(bkpinfo);
898            log_msg(4, "Started reading from next tape.");
899            skip_incoming_files_until_we_find_this_one(temp_fname);
900            log_msg(4, "Skipped irrelevant files OK.");
901            for (size = orig_size; size > where_I_was_before_tape_change;
902                 size -= bytes_to_write) {
903                bytes_read =
904                    fread(datablock, 1, bytes_to_read, g_tape_stream);
905            }
906            log_msg(4, "'size' is now %lld (should be %lld)", size,
907                    where_I_was_before_tape_change);
908            log_to_screen("Successfully re-sync'd tape");
909            had_to_resync = TRUE;
910            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
911        }
912
913        (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
914
915#ifdef EXTRA_TAPE_CHECKSUMS
916        for (i = 0; i < (int) bytes_to_write; i++) {
917            ch = datablock[i];
918            crc16 = updcrcr(crc16, (unsigned) ch);
919            crctt = updcrc(crctt, (unsigned) ch);
920        }
921#endif
922    }
923    log_msg(6, "Total read from tape for this file = %lld",
924            total_read_from_tape_for_this_file);
925    log_msg(6, ".......................... Should be %lld", orig_size);
926    g_tape_posK += total_read_from_tape_for_this_file / 1024;
927    asprintf(&actual_cksum, "%04x%04x", crc16, crctt);
928    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
929    } else {
930        paranoid_fclose(fout);
931    }
932    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
933    if (ctrl_chr != BLK_STOP_FILE) {
934        wrong_marker(BLK_STOP_FILE, ctrl_chr);
935//      fatal_error("Bad marker"); // return(1);
936    }
937    if (strcmp(temp_cksum, actual_cksum)) {
938        asprintf(&tmp, "actual cksum=%s; recorded cksum=%s", actual_cksum,
939                temp_cksum);
940        log_to_screen(tmp);
941        paranoid_free(tmp);
942
943        asprintf(&tmp, "%s (%ld K) is corrupt on tape", temp_fname,
944                (long) orig_size >> 10);
945        log_to_screen(tmp);
946        paranoid_free(tmp);
947        retval++;
948    }
949    paranoid_free(actual_cksum);
950    paranoid_free(datablock);
951    paranoid_free(temp_fname);
952    paranoid_free(temp_cksum);
953    return (retval);
954}
955
956
957/**
958 * Read a header block from the currently opened stream (CD or tape).
959 * This block indicates the length of the following file (if it's file-related)
960 * the filename (if it's file-related), and the block type.
961 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
962 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
963 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
964 * @return 0 for success, nonzero for failure.
965 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
966 */
967int
968read_header_block_from_stream(long long *plen, char *filename,
969                              int *pcontrol_char)
970{
971
972    /*@ buffers ***************************************************** */
973    char *tempblock;
974
975    /*@ int ********************************************************* */
976    int i, retval;
977
978    /*@ end vars *************************************************** */
979
980    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
981
982    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
983        tempblock[i] = 0;
984    }
985    while (!(*pcontrol_char = tempblock[7000])) {
986        g_tape_posK +=
987            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
988                  g_tape_stream) / 1024;
989    }
990    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
991    if (strcmp(tempblock + 6000 + *pcontrol_char, "Mondolicious, baby")) {
992        log_it("Bad header block at %ld K", (long) g_tape_posK);
993    }
994    /* the caller manages whether we should allocate or not
995     * by setting the value to NULL (do not allocate) or
996     * something (allocate) */
997    if (filename != NULL) {
998        asprintf(&filename, tempblock + 1000);
999    }
1000    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1001        log_to_screen("I can't verify an aborted backup.");
1002        retval = 1;
1003    } else {
1004        retval = 0;
1005    }
1006    for (i = 1000; i < 1020; i++) {
1007        if (tempblock[i] < 32 || tempblock[i] > 126) {
1008            tempblock[i] = ' ';
1009        }
1010    }
1011    tempblock[i] = '\0';
1012    log_msg(6, "%s (fname=%s, size=%ld K)",
1013            marker_to_string(*pcontrol_char), tempblock + 1000,
1014            (long) (*plen) >> 10);
1015    paranoid_free(tempblock);
1016    return (retval);
1017}
1018
1019
1020/**
1021 * Add specified file/slice to the internal catalog of all archives written.
1022 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1023 * write the last [buffer size] MB from the catalog to the new tape, so we know
1024 * we have @e all archives on some CD/tape/whatever.
1025 * @param type The type of file we're cataloging (afioball, slice, something else)
1026 * @param number The fileset number or biggiefile number.
1027 * @param aux The slice number if it's a biggiefile, or any other additional info.
1028 * @param fn The original full pathname of the file we're recording.
1029 * @return The index of the record we just added.
1030 */
1031int register_in_tape_catalog(t_archtype type, int number, long aux,
1032                             char *fn)
1033{
1034    int last;
1035    char fname[MAX_TAPECAT_FNAME_LEN];
1036    char *p;
1037
1038    p = strrchr(fn, '/');
1039    if (p) {
1040        p++;
1041    } else {
1042        p = fn;
1043    }
1044    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1045    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1046    last = g_tapecatalog->entries;
1047    if (last >= MAX_TAPECATALOG_ENTRIES) {
1048        log_it
1049            ("Warning - can't log #%d in tape catalog - too many entries already",
1050             number);
1051        return (-1);
1052    }
1053    g_tapecatalog->el[last].type = type;
1054    g_tapecatalog->el[last].number = number;
1055    g_tapecatalog->el[last].aux = aux;
1056    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1057    strcpy(g_tapecatalog->el[last].fname, fname);
1058    g_tapecatalog->entries++;
1059    return (last);              // returns the index of the record we've jsut added
1060}
1061
1062
1063/**
1064 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1065 * (got SIGPIPE) or look like we will.
1066 * @param mediasize The size of the tape in megabytes.
1067 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1068 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1069 * autodetecting the size. Huh?
1070 */
1071bool
1072should_we_write_to_next_tape(long mediasize,
1073                             long long length_of_incoming_file)
1074{
1075    /*@ bool's ***************************************************** */
1076    bool we_need_a_new_tape = FALSE;
1077
1078    /*@ end vars *************************************************** */
1079
1080    if (mediasize == 0) {
1081        return (FALSE);
1082    }
1083    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1084        log_it("mediasize = %ld", mediasize);
1085        we_need_a_new_tape = TRUE;
1086        log_to_screen("Should have started a new tape/CD already");
1087    }
1088    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1089        mediasize - (SLICE_SIZE * 4 / 1024)) {
1090        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1091               mediasize);
1092        we_need_a_new_tape = TRUE;
1093    }
1094    return (we_need_a_new_tape);
1095}
1096
1097
1098/**
1099 * Seek through the stream until we find a header block where the NAME field matches
1100 * @p the_file_I_was_reading. This is useful if you've just started reading from
1101 * a new tape and want to find the file you were reading when the tape ended.
1102 * @param the_file_I_was_reading File name to look for.
1103 * @return 0 for success, nonzero for failure.
1104 */
1105int skip_incoming_files_until_we_find_this_one(char
1106                                               *the_file_I_was_reading)
1107{
1108    char *pA;
1109    char *pB;
1110    int res;
1111    int ctrl_chr;
1112    char *temp_fname = &res;        /* should NOT be NULL */
1113    char *datablock;
1114    long long temp_size, size;
1115    long bytes_to_write;
1116
1117    datablock = malloc(TAPE_BLOCK_SIZE);
1118    pB = strrchr(the_file_I_was_reading, '/');
1119    if (pB) {
1120        pB++;
1121    } else {
1122        pB = the_file_I_was_reading;
1123    }
1124    log_msg(1, "skip_incoming_..(%s)", pB);
1125    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1126    ctrl_chr = -1;
1127    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1128        res =
1129            read_header_block_from_stream(&temp_size, temp_fname,
1130                                          &ctrl_chr);
1131        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1132            break;
1133        }
1134        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1135        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1136        log_msg(3, "Still trying to re-sync w/ tape");
1137        paranoid_free(temp_fname);
1138        temp_fname = &res;
1139    }
1140    while (ctrl_chr != BLK_START_FILE) {
1141        res =
1142            read_header_block_from_stream(&temp_size, temp_fname,
1143                                          &ctrl_chr);
1144        if (ctrl_chr == BLK_START_FILE) {
1145            break;
1146        }
1147        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1148        wrong_marker(BLK_START_FILE, ctrl_chr);
1149        log_msg(3, "Still trying to re-sync w/ tape");
1150        /* Do not desallocate when the while condition is met */
1151        if (ctrl_chr != BLK_START_FILE) {
1152            paranoid_free(temp_fname);
1153            temp_fname = &res;
1154        }
1155    }
1156    pA = strrchr(temp_fname, '/');
1157    if (pA) {
1158        pA++;
1159    } else {
1160        pA = temp_fname;
1161    }
1162    pB = strrchr(the_file_I_was_reading, '/');
1163    if (pB) {
1164        pB++;
1165    } else {
1166        pB = the_file_I_was_reading;
1167    }
1168    while (strcmp(pA, pB)) {
1169        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1170                the_file_I_was_reading);
1171        for (size = temp_size; size > 0; size -= bytes_to_write) {
1172            bytes_to_write =
1173                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1174            // FIXME - needs error-checking and -catching
1175            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1176        }
1177       
1178        paranoid_free(temp_fname);
1179        temp_fname = &res;
1180        res =
1181            read_header_block_from_stream(&temp_size, NULL,
1182                                          &ctrl_chr);
1183        if (ctrl_chr != BLK_STOP_FILE) {
1184            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1185        }
1186        res =
1187            read_header_block_from_stream(&temp_size, NULL,
1188                                          &ctrl_chr);
1189        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1190            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1191        }
1192        res =
1193            read_header_block_from_stream(&temp_size, NULL,
1194                                          &ctrl_chr);
1195        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1196            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1197        }
1198        res =
1199            read_header_block_from_stream(&temp_size, temp_fname,
1200                                          &ctrl_chr);
1201        if (ctrl_chr != BLK_START_FILE) {
1202            wrong_marker(BLK_START_FILE, ctrl_chr);
1203        }
1204        pA = strrchr(temp_fname, '/');
1205        if (pA) {
1206            pA++;
1207        } else {
1208            pA = temp_fname;
1209        }
1210        /* BERLIOS: useless ?
1211        pB = strrchr(the_file_I_was_reading, '/');
1212        if (pB) {
1213            pB++;
1214        } else {
1215            pB = the_file_I_was_reading;
1216        }
1217        */
1218    }
1219    log_msg(2, "Reading %s (it matches %s)", temp_fname,
1220            the_file_I_was_reading);
1221    paranoid_free(temp_fname);
1222    paranoid_free(datablock);
1223    return (0);
1224}
1225
1226
1227/**
1228 * Start to read from the next tape. Assumes the user has already inserted it.
1229 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1230 * @return 0 for success, nonzero for failure.
1231 */
1232int start_to_read_from_next_tape(struct s_bkpinfo *bkpinfo)
1233{
1234    /*@ int ********************************************************* */
1235    int res = 0;
1236    int ctrlchr;
1237    long long temp_size;
1238    /*@ end vars *************************************************** */
1239
1240    paranoid_pclose(g_tape_stream);
1241    system("sync");
1242    system("sync");
1243    system("sync");
1244    log_it("Next tape requested.");
1245    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1246    log_it("Opening IN the next tape");
1247    if (!
1248        (g_tape_stream =
1249         open_device_via_buffer(bkpinfo->media_device, 'r',
1250                                bkpinfo->internal_tape_block_size))) {
1251        log_OS_error(g_tape_fifo);
1252        log_to_screen("Cannot openin stream device");
1253        return (1);
1254    }
1255    g_tape_posK = 0;
1256    g_sigpipe = FALSE;
1257    res += read_header_block_from_stream(&temp_size, NULL, &ctrlchr);   /* just in case */
1258    if (ctrlchr != BLK_START_OF_TAPE) {
1259        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1260    }
1261    res += read_header_block_from_stream(&temp_size, NULL, &ctrlchr);   /* just in case */
1262    if (ctrlchr != BLK_START_OF_BACKUP) {
1263        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1264    } else {
1265        log_msg(3, "Next tape opened OK. Whoopee!");
1266    }
1267    return (res);
1268}
1269
1270
1271/**
1272 * Start to write to the next tape. Assume the user has already inserted it.
1273 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1274 * @return 0 for success, nonzero for failure.
1275 */
1276int start_to_write_to_next_tape(struct s_bkpinfo *bkpinfo)
1277{
1278    int res = 0;
1279    char *command;
1280
1281    paranoid_pclose(g_tape_stream);
1282    system("sync");
1283    system("sync");
1284    system("sync");
1285    log_it("New tape requested.");
1286    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1287    if (g_current_media_number > MAX_NOOF_MEDIA) {
1288        res++;
1289        log_to_screen("Too many tapes. Man, you need to use nfs!");
1290    }
1291    if (bkpinfo->backup_media_type == cdstream) {
1292        asprintf(&command,
1293                "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1294                bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE,
1295                MONDO_LOGFILE);
1296        log_it("Opening OUT to next CD with the command");
1297        log_it(command);
1298        log_it("Let's see what happens, shall we?");
1299        g_tape_stream = popen(command, "w");
1300        paranoid_free(command);
1301        if (!g_tape_stream) {
1302            log_to_screen("Failed to openout to cdstream (fifo)");
1303            return (1);
1304        }
1305    } else {
1306        log_it("Opening OUT to next tape");
1307        if (!
1308            (g_tape_stream =
1309             open_device_via_buffer(bkpinfo->media_device, 'w',
1310                                    bkpinfo->internal_tape_block_size))) {
1311            log_OS_error(g_tape_fifo);
1312            log_to_screen("Cannot openin stream device");
1313            return (1);
1314        }
1315    }
1316    g_tape_posK = 0;
1317    g_sigpipe = FALSE;
1318    res += write_header_block_to_stream(0, "start-of-tape", BLK_START_OF_TAPE); /* just in case */
1319    res += write_header_block_to_stream(0, "start-of-backup", BLK_START_OF_BACKUP); /* just in case */
1320    return (res);
1321}
1322
1323
1324/**
1325 * Write a bufferfull of the most recent archives to the tape. The
1326 * rationale behind this is a bit complex. If the previous tape ended
1327 * suddenly (EOF or otherwise) some archives were probably left in the
1328 * buffer. That means that Mondo thinks they have been written, but
1329 * the external binary @c buffer has not actually written them. So to
1330 * be safe, we start the new tape by writing the last bufferfull from
1331 * the old one. This insures that all archives will be on at least
1332 * one tape. Sounds inelegant, but it works.
1333 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1334 * @return 0 for success, nonzero for failure.
1335 */
1336int write_backcatalog_to_tape(struct s_bkpinfo *bkpinfo)
1337{
1338    int i, last, res = 0;
1339    char *fname;
1340
1341    log_msg(2, "I am now writing back catalog to tape");
1342    last = g_tapecatalog->entries - 1;
1343    for (i = 0; i <= last; i++) {
1344        asprintf(&fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir,
1345                g_tapecatalog->el[i].fname);
1346        if (!does_file_exist(fname)) {
1347            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1348        } else {
1349            write_header_block_to_stream(length_of_file(fname),
1350                                         "start-backcatalog-afio-or-slice",
1351                                         BLK_START_AN_AFIO_OR_SLICE);
1352            log_msg(2, "Writing %s", fname);
1353            if (write_file_to_stream_from_file(bkpinfo, fname)) {
1354                res++;
1355                log_msg(2, "%s failed", fname);
1356            }
1357            if (i != last) {
1358                write_header_block_to_stream(0,
1359                                             "stop-backcatalog-afio-or-slice",
1360                                             BLK_STOP_AN_AFIO_OR_SLICE);
1361            }
1362        }
1363        paranoid_free(fname);
1364    }
1365    log_msg(2, "Finished writing back catalog to tape");
1366    return (res);
1367}
1368
1369
1370/**
1371 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1372 * @param fname The path to all.tar.gz.
1373 * @return 0 for success, nonzero for failure.
1374 */
1375int write_data_disks_to_stream(char *fname)
1376{
1377    /*@ pointers *************************************************** */
1378    FILE *fin;
1379    char *tmp;
1380
1381    /*@ long ******************************************************* */
1382    long m = -1;
1383    long templong;
1384
1385    /*@ int ******************************************************** */
1386    int i, j;
1387
1388    /*@ buffers **************************************************** */
1389    char tempblock[256 * 1024];
1390
1391    /*@ end vars *************************************************** */
1392
1393    open_evalcall_form("Writing data disks to tape");
1394    log_to_screen("Writing data disks to tape");
1395    log_it("Data disks = %s", fname);
1396    if (!does_file_exist(fname)) {
1397        asprintf(&tmp, "Cannot find %s", fname);
1398        log_to_screen(tmp);
1399        paranoid_free(tmp);
1400        return (1);
1401    }
1402    if (!(fin = fopen(fname, "r"))) {
1403        log_OS_error(fname);
1404        fatal_error("Cannot openin the data disk");
1405    }
1406    for (i = 0; i < 32; i++) {  /* 32MB */
1407        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1408            if (!feof(fin)) {
1409                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1410            } else {
1411                m = 0;
1412            }
1413            for (; m < 256 * 1024; m++) {
1414                tempblock[m] = '\0';
1415            }
1416            g_tape_posK +=
1417                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1418        }
1419        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1420        {
1421            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1422            update_evalcall_form((int) (templong));
1423        }
1424    }
1425    paranoid_fclose(fin);
1426    close_evalcall_form();
1427    return (0);
1428}
1429
1430
1431/**
1432 * Copy @p infile to the opened stream (CD or tape).
1433 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1434 * @param infile The file to write to the stream.
1435 * @return 0 for success, nonzero for failure.
1436 */
1437int write_file_to_stream_from_file(struct s_bkpinfo *bkpinfo, char *infile)
1438{
1439    /*@ buffers **************************************************** */
1440    char *tmp;
1441    char datablock[TAPE_BLOCK_SIZE];
1442    char *checksum;
1443    char *infile_basename;
1444
1445    /*@ int ******************************************************** */
1446    int retval = 0;
1447    int noof_blocks;
1448
1449    /*  unsigned int ch; */
1450    unsigned int crc16;
1451    unsigned int crctt;
1452
1453    /*@ pointers *************************************************** */
1454    FILE *fin;
1455    char *p;
1456
1457    /*@ long ******************************************************* */
1458    long bytes_to_read = 0;
1459    long i;
1460
1461    /*@ long long ************************************************** */
1462    long long filesize;
1463
1464#ifdef EXTRA_TAPE_CHECKSUMS
1465    int ch;
1466#endif
1467
1468    /*@ initialize ************************************************ */
1469    crc16 = 0;
1470    crctt = 0;
1471
1472    /*@ end vars *************************************************** */
1473
1474    infile_basename = strrchr(infile, '/');
1475    if (infile_basename) {
1476        infile_basename++;
1477    } else {
1478        infile_basename = infile;
1479    }
1480    filesize = length_of_file(infile);
1481    if (should_we_write_to_next_tape
1482        (bkpinfo->media_size[g_current_media_number], filesize)) {
1483        start_to_write_to_next_tape(bkpinfo);
1484        write_backcatalog_to_tape(bkpinfo);
1485    }
1486    p = strrchr(infile, '/');
1487    if (!p) {
1488        p = infile;
1489    } else {
1490        p++;
1491    }
1492    asprintf(&tmp, "Writing file '%s' to tape (%ld KB)", p,
1493            (long) filesize >> 10);
1494    log_it(tmp);
1495    paranoid_free(tmp);
1496
1497    write_header_block_to_stream(filesize, infile_basename,
1498                                 BLK_START_FILE);
1499//go_here_to_restart_saving_of_file:
1500    if (!(fin = fopen(infile, "r"))) {
1501        log_OS_error(infile);
1502        return (1);
1503    }
1504    for (noof_blocks = 0; filesize > 0;
1505         noof_blocks++, filesize -= bytes_to_read) {
1506        if (filesize < TAPE_BLOCK_SIZE) {
1507            bytes_to_read = (long) filesize;
1508            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1509                datablock[i] = '\0';
1510            }
1511        } else {
1512            bytes_to_read = TAPE_BLOCK_SIZE;
1513        }
1514        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1515        g_tape_posK += fwrite(datablock, 1, /*bytes_to_read */
1516                              (size_t) TAPE_BLOCK_SIZE,
1517                              g_tape_stream) / 1024;
1518        if (g_sigpipe) {
1519            iamhere("Sigpipe occurred recently. I'll start a new tape.");
1520            fclose(fin);
1521            g_sigpipe = FALSE;
1522            start_to_write_to_next_tape(bkpinfo);
1523            write_backcatalog_to_tape(bkpinfo); // kinda-sorta recursive :)
1524            return (0);
1525        }
1526#ifdef EXTRA_TAPE_CHECKSUMS
1527        for (i = 0; i < bytes_to_read; i++) {
1528            ch = datablock[i];
1529            crc16 = updcrcr(crc16, (unsigned) ch);
1530            crctt = updcrc(crctt, (unsigned) ch);
1531        }
1532#endif
1533    }
1534    paranoid_fclose(fin);
1535    asprintf(&checksum, "%04x%04x", crc16, crctt);
1536    write_header_block_to_stream(g_current_media_number, checksum,
1537                                 BLK_STOP_FILE);
1538    paranoid_free(checksum);
1539//  log_it("File '%s' written to tape.", infile);
1540    return (retval);
1541}
1542
1543
1544/**
1545 * Write a header block to the opened stream (CD or tape).
1546 * @param length_of_incoming_file The length to store in the header block.
1547 * Usually matters only if this is a file-related header, in which case it should
1548 * be the length of the file that will follow.
1549 * @param filename The filename to store in the header block. Usually matters
1550 * only if this is a file-related header, in which case this should be the name
1551 * if the file that will follow.
1552 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1553 * @return 0 for success, nonzero for failure.
1554 */
1555int
1556write_header_block_to_stream(long long length_of_incoming_file,
1557                             char *filename, int control_char)
1558{
1559    /*@ buffers **************************************************** */
1560    char tempblock[TAPE_BLOCK_SIZE];
1561    char *tmp;
1562    char *p;
1563
1564    /*@ int ******************************************************** */
1565    int i;
1566
1567    /*@ long long ************************************************** */
1568    long long olen;
1569
1570    /*@ end vars *************************************************** */
1571
1572
1573    olen = length_of_incoming_file;
1574    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1575    if (!p) {
1576        p = filename;
1577    } else {
1578        p++;
1579    }
1580    if (!g_tape_stream) {
1581        log_to_screen
1582            ("You're not backing up to tape. Why write a tape header?");
1583        return (1);
1584    }
1585    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1586        tempblock[i] = 0;
1587    }
1588    sprintf(tempblock + 6000 + control_char, "Mondolicious, baby");
1589    tempblock[7000] = control_char;
1590    memcpy(tempblock + 7001, (char *) &olen, sizeof(long long));
1591    strcpy(tempblock + 1000, filename);
1592    g_tape_posK +=
1593        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1594               g_tape_stream) / 1024;
1595    asprintf(&tmp, "%s (fname=%s, size=%ld K)",
1596            marker_to_string(control_char), p,
1597            (long) length_of_incoming_file >> 10);
1598    log_msg(6, tmp);
1599    paranoid_free(tmp);
1600    return (0);
1601}
1602
1603
1604/**
1605 * Log (to screen) an erroneous marker, along with what it should have been.
1606 * @param should_be What we were expecting.
1607 * @param it_is What we got.
1608 */
1609void wrong_marker(int should_be, int it_is)
1610{
1611    /*@ buffer ***************************************************** */
1612    char *tmp;
1613
1614
1615    /*@ end vars *************************************************** */
1616    asprintf(&tmp, "Wrong marker! (Should be %s, is actually %s)",
1617            marker_to_string(should_be), marker_to_string(it_is));
1618    log_to_screen(tmp);
1619    paranoid_free(tmp);
1620}
1621
1622/* @} - end of streamGroup */
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