source: trunk/mondo/mondo/common/libmondo-stream.c @ 146

Last change on this file since 146 was 146, checked in by bcornec, 14 years ago

MONDO_LOGFILE used each time now
memory management on libmondo-devices.c
some splint improvements

  • Property svn:keywords set to Id
File size: 46.9 KB
Line 
1/* $Id: libmondo-stream.c 146 2005-12-01 09:00:14Z 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 146 2005-12-01 09:00:14Z 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"). 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;
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] = '\0';
223    siz = NULL;
224    if (find_home_of_exe("cdrecord")) {
225        asprintf(&cdr_exe, "cdrecord");
226    } else {
227        asprintf(&cdr_exe, "dvdrecord");
228    }
229    asprintf(&command, "%s -scanbus 2> /dev/null | grep -i tape | wc -l",
230             cdr_exe);
231    asprintf(&tmp, call_program_and_get_last_line_of_output(command));
232    paranoid_free(command);
233
234    if (atoi(tmp) != 1) {
235        log_it
236            ("Either too few or too many tape streamers for me to detect...");
237        strcpy(dev, VANILLA_SCSI_TAPE);
238        paranoid_free(tmp);
239        paranoid_free(cdr_exe);
240        return 1;
241    }
242    paranoid_free(tmp);
243
244    asprintf(&command,
245             "%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",
246             cdr_exe);
247    asprintf(&tmp, call_program_and_get_last_line_of_output(command));
248    paranoid_free(command);
249    if (strlen(tmp) < 2) {
250        log_it("Could not find tape device");
251        paranoid_free(tmp);
252        paranoid_free(cdr_exe);
253        return 1;
254    }
255    paranoid_free(tmp);
256
257    asprintf(&command,
258             "%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",
259             cdr_exe);
260    paranoid_free(cdr_exe);
261
262    asprintf(&tmp, call_program_and_get_last_line_of_output(command));
263    paranoid_free(command);
264    strcpy(dev, VANILLA_SCSI_TAPE);
265    dev[strlen(dev) - 1] = '\0';
266    strcat(dev, tmp);           // e.g. '/dev/st0' becomes '/dev/stN'
267    paranoid_free(tmp);
268
269    res = 0;
270    if (!mt_says_tape_exists(dev)) {
271        strcpy(dev, ALT_TAPE);
272        if (!mt_says_tape_exists(dev)) {
273            log_it("Cannot openin %s", dev);
274            strcpy(dev, "/dev/st0");
275            if (!mt_says_tape_exists(dev)) {
276                log_it("Cannot openin %s", dev);
277                strcpy(dev, "/dev/osst0");
278                if (!mt_says_tape_exists(dev)) {
279                    res++;
280                } else {
281                    res = 0;
282                }
283            }
284        }
285    }
286
287    log_it("At this point, dev = %s and res = %d", dev, res);
288
289    asprintf(&tmp, call_program_and_get_last_line_of_output("\
290cdrecord -scanbus 2> /dev/null | tr -s '\t' ' ' | \
291grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | \
292awk '{for(i=1; i<NF; i++) { if (index($i, \"GB\")>0) { print $i;};};};'"));
293
294    if (mt_says_tape_exists(dev)) {
295        res = 0;
296    } else {
297        log_it("Turning %s", dev);
298        paranoid_free(tmp);
299        asprintf(&tmp,
300                 (strrchr(dev, '/') != NULL) ? strrchr(dev, '/') : dev);
301        sprintf(dev, "/dev/os%s", tmp);
302        log_it("...into %s", dev);
303        if (mt_says_tape_exists(dev)) {
304            res = 0;
305        } else {
306            res++;
307        }
308    }
309
310    log_it("res=%d; dev=%s", res, dev);
311
312    if (res) {
313        paranoid_free(tmp);
314        return (res);
315    }
316
317    if (strlen(tmp) < 2) {
318        log_it("Warning - size of tape unknown");
319        paranoid_free(tmp);
320        return (0);
321    } else {
322        siz = tmp;
323        return (0);
324    }
325}
326
327int read_EXAT_files_from_tape(struct s_bkpinfo *bkpinfo,
328                              long long *ptmp_size, char *tmp_fname,
329                              int *pctrl_chr, char *xattr_fname,
330                              char *acl_fname)
331{
332    int res = 0;
333    int retval = 0;
334    char *fname = &res;         /* Should NOT be NULL */
335
336// xattr
337    res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
338    if (*pctrl_chr != BLK_START_EXAT_FILE) {
339        wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
340    }
341    if (!strstr(fname, "xattr")) {
342        fatal_error("Wrong order, sunshine.");
343    }
344    paranoid_free(fname);
345    fname = &res;
346    read_file_from_stream_to_file(bkpinfo, xattr_fname, *ptmp_size);
347    res = read_header_block_from_stream(ptmp_size, NULL, pctrl_chr);
348    if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
349        wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
350    }
351    // acl
352    res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
353    if (!strstr(fname, "acl")) {
354        fatal_error("Wrong order, sunshine.");
355    }
356    paranoid_free(fname);
357    fname = &res;
358    if (*pctrl_chr != BLK_START_EXAT_FILE) {
359        wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
360    }
361    read_file_from_stream_to_file(bkpinfo, acl_fname, *ptmp_size);
362    res = read_header_block_from_stream(ptmp_size, NULL, pctrl_chr);
363    if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
364        wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
365    }
366    res = read_header_block_from_stream(ptmp_size, NULL, pctrl_chr);
367    if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
368        wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
369    }
370    // tarball itself
371    res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
372    log_msg(1, "Got xattr and acl; now looking for afioball");
373    tmp_fname = fname;
374    return (retval);
375}
376
377
378int write_EXAT_files_to_tape(struct s_bkpinfo *bkpinfo, char *xattr_fname,
379                             char *acl_fname)
380{
381    int res = 0;
382    // EXATs
383    write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
384                                 BLK_START_EXTENDED_ATTRIBUTES);
385    // xattr
386    write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
387                                 BLK_START_EXAT_FILE);
388    write_file_to_stream_from_file(bkpinfo, xattr_fname);
389    write_header_block_to_stream(-1, xattr_fname, BLK_STOP_EXAT_FILE);
390// acl
391    write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
392                                 BLK_START_EXAT_FILE);
393    write_file_to_stream_from_file(bkpinfo, acl_fname);
394    write_header_block_to_stream(-1, acl_fname, BLK_STOP_EXAT_FILE);
395    write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
396                                 BLK_STOP_EXTENDED_ATTRIBUTES);
397    return (res);
398}
399
400
401
402
403/**
404 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
405 * @param tapeno The tape number to insist on.
406 * @bug There is currently no way to actually verify that the user has actually
407 * inserted the right tape.
408 */
409void insist_on_this_tape_number(int tapeno)
410{
411    int i;
412    char *tmp;
413
414    log_it("Insisting on tape #%d", tapeno);
415    if (g_current_media_number != tapeno) {
416        //      log_it("g_current_media_number = %d", g_current_media_number);
417        asprintf(&tmp,
418                 "When the tape drive goes quiet, please insert volume %d in this series.",
419                 tapeno);
420        popup_and_OK(tmp);
421        paranoid_free(tmp);
422        open_evalcall_form("Waiting while the tape drive settles");
423    } else {
424        open_evalcall_form("Waiting while the tape drive rewinds");
425    }
426
427    for (i = 0; i <= 100; i += 2) {
428        usleep(100000);
429        update_evalcall_form(i);
430    }
431    close_evalcall_form();
432    log_it("I assume user has inserted it. They _say_ they have...");
433    g_current_media_number = tapeno;
434
435    //  log_it("g_current_media_number = %d", g_current_media_number);
436    log_it("OK, I've finished insisting. On with the revelry.");
437}
438
439
440/**
441 * Debugging aid - log the offset we're at on the tape (reading or writing).
442 */
443void log_tape_pos(void)
444{
445    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
446           (long) g_tape_posK >> 10);
447}
448
449
450
451
452/**
453 * Add a file to a collection of recently archived filesets/slices.
454 * The type is determined by the filename: if it contains ".afio." it is
455 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
456 * otherwise we generate a fatal_error().
457 * @param td The current @c bkpinfo->tempdir (file will be placed in <tt>td</tt>/tmpfs/backcatalog/).
458 * @param latest_fname The file to place in the collection.
459 * @return 0, always.
460 * @bug Return value is redundant.
461 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
462 */
463int maintain_collection_of_recent_archives(char *td, char *latest_fname)
464{
465    long long final_alleged_writeK, final_projected_certain_writeK,
466        final_actually_certain_writeK = 0, cposK, bufsize_K;
467    int last, curr, i;
468    t_archtype type = other;
469    char *command;
470    char *tmpdir;
471    char *old_fname;
472    char *p;
473    /* BERLIOS: useless
474       char suffix[16];
475     */
476
477    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
478    asprintf(&tmpdir, "%s/tmpfs/backcatalog", td);
479    /* BERLIOS: useless
480       if ((p = strrchr(latest_fname, '.'))) {
481       strcpy(suffix, ++p);
482       } else {
483       suffix[0] = '\0';
484       }
485     */
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    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    paranoid_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        asprintf(&old_fname, "%s/%s", tmpdir, g_tapecatalog->el[i].fname);
526        unlink(old_fname);
527        paranoid_free(old_fname);
528    }
529    paranoid_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
546/**
547 * FIFO used to read/write to the tape device.
548 * @bug This seems obsolete now that we call an external @c buffer program. Please look onto this.
549 */
550char g_tape_fifo[MAX_STR_LEN];
551
552int set_tape_block_size_with_mt(char *tapedev,
553                                long internal_tape_block_size)
554{
555    char *tmp;
556    int res;
557
558    if (strncmp(tapedev, "/dev/", 5)) {
559        log_msg(1,
560                "Not using 'mt setblk'. This isn't an actual /dev entry.");
561        return (0);
562    }
563    asprintf(&tmp, "mt -f %s setblk %ld", tapedev,
564             internal_tape_block_size);
565    res = run_program_and_log_output(tmp, 3);
566    paranoid_free(tmp);
567    return (res);
568}
569
570
571/**
572 * Open the tape device for input.
573 * @param bkpinfo The backup information structure. Fields used:
574 * - @c bkpinfo->media_device
575 * - @c bkpinfo->tmpdir
576 * @return 0 for success, nonzero for failure.
577 * @note This will also work with a cdstream for now, but don't count on this behavior.
578 */
579int openin_tape(struct s_bkpinfo *bkpinfo)
580{
581    /*@ buffer ***************************************************** */
582    char *datablock;
583    char *tmp;
584    char old_cwd[MAX_STR_LEN];
585    char *outfname;
586    /*@ int ******************************************************* */
587    int i;
588    int j;
589    int res;
590    long length, templong;
591    size_t k;
592    int retval = 0;
593    int ctrl_chr;
594
595    /*@ long long ************************************************* */
596    long long size;
597
598    /*@ pointers ************************************************** */
599    FILE *fout;
600
601    /*@ end vars *************************************************** */
602
603    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
604    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
605        fatal_error("Cannot alloc mem for tape catalog");
606    }
607    g_tapecatalog->entries = 0;
608    g_tape_posK = 0;
609    if (g_tape_stream) {
610        log_it("FYI - I won't 'openin' the tape. It's already open.");
611        return (0);
612    }
613    insist_on_this_tape_number(1);
614    asprintf(&outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
615    make_hole_for_file(outfname);
616
617    set_tape_block_size_with_mt(bkpinfo->media_device,
618                                bkpinfo->internal_tape_block_size);
619
620//  start_buffer_process( bkpinfo->media_device, g_tape_fifo, FALSE);
621    log_it("Opening IN tape");
622    if (!
623        (g_tape_stream =
624         open_device_via_buffer(bkpinfo->media_device, 'r',
625                                bkpinfo->internal_tape_block_size))) {
626        log_OS_error(g_tape_fifo);
627        log_to_screen("Cannot openin stream device");
628        return (1);
629    }
630    log_to_screen("Reading stream");
631    log_it("stream device = '%s'", bkpinfo->media_device);
632/* skip data disks */
633    open_evalcall_form("Skipping data disks on stream");
634    log_to_screen("Skipping data disks on stream");
635    if (!(fout = fopen(outfname, "w"))) {
636        log_OS_error(outfname);
637        log_to_screen("Cannot openout datadisk all.tar.gz file");
638        return (-1);
639    }
640    if (!(datablock = (char *) malloc(256 * 1024))) {
641        log_to_screen("Unable to malloc 256*1024");
642        exit(1);
643    }
644    for (i = 0; i < 32; i++) {
645        for (j = 0; j < 4; j++) {
646            for (length = 0, k = 0; length < 256 * 1024; length += k) {
647                k = fread(datablock + length, 1, 256 * 1024 - length,
648                          g_tape_stream);
649            }
650            (void) fwrite(datablock, 1, (size_t) length, fout);
651            g_tape_posK += length / 1024;
652        }
653        if (i > 8)              // otherwise, 'buffer' distorts calculations
654        {
655            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
656            update_evalcall_form((int) (templong));
657        }
658    }
659    paranoid_fclose(fout);
660    paranoid_free(datablock);
661    /* find initial blocks */
662    res = read_header_block_from_stream(&size, NULL, &ctrl_chr);
663    retval += res;
664    if (ctrl_chr != BLK_START_OF_TAPE) {
665        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
666    }
667    res = read_header_block_from_stream(&size, NULL, &ctrl_chr);
668    retval += res;
669    if (ctrl_chr != BLK_START_OF_BACKUP) {
670        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
671    }
672    close_evalcall_form();
673    log_it("Saved all.tar.gz to '%s'", outfname);
674    (void) getcwd(old_cwd, MAX_STR_LEN);
675    chdir(bkpinfo->tmpdir);
676    asprintf(&tmp, "tar -zxf %s tmp/mondo-restore.cfg 2> /dev/null",
677             outfname);
678    paranoid_system(tmp);
679    paranoid_free(tmp);
680    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
681    chdir(old_cwd);
682    unlink(outfname);
683    paranoid_free(outfname);
684    return (retval);
685}
686
687
688/**
689 * Start writing to a CD stream.
690 * @param cddev The CD device to openout via cdrecord.
691 * @param speed The speed to write at.
692 * @return 0 for success, nonzero for failure.
693 * @note This should be called only from backup processes.
694 */
695int openout_cdstream(char *cddev, int speed)
696{
697    /*@ buffers ***************************************************** */
698    char command;
699
700    /*@ end vars *************************************************** */
701
702    /*  add 'dummy' if testing */
703    asprintf(&command,
704             "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
705             cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
706    /*  initialise the catalog */
707    g_current_media_number = 1;
708    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
709        fatal_error("Cannot alloc mem for tape catalog");
710    }
711    g_tapecatalog->entries = 0;
712    /* log stuff */
713    log_it("Opening OUT cdstream with the command");
714    log_it(command);
715    /*  log_it("Let's see what happens, shall we?"); */
716    g_tape_stream = popen(command, "w");
717    paranoid_free(command);
718    if (g_tape_stream) {
719        return (0);
720    } else {
721        log_to_screen("Failed to openout to cdstream (fifo)");
722        return (1);
723    }
724}
725
726
727/**
728 * Start writing to a tape device for the backup.
729 * @param tapedev The tape device to open for writing.
730 * @return 0 for success, nonzero for failure.
731 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
732 * EXISTING DATA on the tape!
733 */
734int openout_tape(char *tapedev, long internal_tape_block_size)
735{
736    g_current_media_number = 1;
737    if (g_tape_stream) {
738        log_it("FYI - I won't 'openout' the tape. It's already open.");
739        return (0);
740    }
741    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
742        fatal_error("Cannot alloc mem for tape catalog");
743    }
744    g_tapecatalog->entries = 0;
745    g_tape_posK = 0;
746
747    set_tape_block_size_with_mt(tapedev, internal_tape_block_size);
748    log_it("Opening OUT tape");
749    if (!
750        (g_tape_stream =
751         open_device_via_buffer(tapedev, 'w', internal_tape_block_size))) {
752        log_OS_error(g_tape_fifo);
753        log_to_screen("Cannot openin stream device");
754        return (1);
755    }
756    return (0);
757}
758
759
760/**
761 * Copy a file from the opened stream (CD or tape) to @p outfile.
762 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
763 * @param outfile The file to write to.
764 * @param size The size of the file in the input stream.
765 * @return 0 for success, nonzero for failure.
766 */
767int
768read_file_from_stream_to_file(struct s_bkpinfo *bkpinfo, char *outfile,
769                              long long size)
770{
771
772    /*@ int ******************************************************** */
773    int res;
774
775    /*@ end vars *************************************************** */
776
777    res = read_file_from_stream_FULL(bkpinfo, outfile, NULL, size);
778
779    return (res);
780}
781
782
783/**
784 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
785 * by @p fout.
786 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
787 * @param fout The stream to write the file to.
788 * @param size The size of the file in bytes.
789 * @return 0 for success, nonzero for failure.
790 */
791int
792read_file_from_stream_to_stream(struct s_bkpinfo *bkpinfo, FILE * fout,
793                                long long size)
794{
795
796    /*@ int ******************************************************** */
797    int res;
798
799    /*@ end vars *************************************************** */
800
801    res = read_file_from_stream_FULL(bkpinfo, NULL, fout, size);
802    return (res);
803}
804
805
806/**
807 * Copy a file from the currently opened stream (CD or tape) to either a
808 * @c FILE pointer indicating a currently-opened file, or a filename indicating
809 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
810 * and read_file_from_stream_to_stream() are wrappers for.
811 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
812 * @param outfname If non-NULL, write to this file.
813 * @param foutstream If non-NULL, write to this stream.
814 * @param orig_size The original length of the file in bytes.
815 * @return 0 for success, nonzero for failure.
816 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
817 */
818int
819read_file_from_stream_FULL(struct s_bkpinfo *bkpinfo, char *outfname,
820                           FILE * foutstream, long long orig_size)
821{
822    /*@ buffers ***************************************************** */
823    char *tmp;
824    char *datablock;
825    char *temp_fname = bkpinfo; /* Should NOT be NULL */
826    char *temp_cksum = bkpinfo; /* Should NOT be NULL */
827    char *actual_cksum;
828
829    /*@ int ********************************************************* */
830    int retval = 0;
831#ifdef EXTRA_TAPE_CHECKSUMS
832    int i, ch;
833#endif
834    int noof_blocks;
835    int ctrl_chr;
836    int res;
837    /*@ pointers **************************************************** */
838    FILE *fout;
839
840    /*@ long    ***************************************************** */
841    long bytes_to_write = 0;
842
843    /*@ long long *************************************************** */
844    long long temp_size, size;
845    long bytes_read, bytes_to_read;
846    long long total_read_from_tape_for_this_file = 0;
847    long long where_I_was_before_tape_change = 0;
848    /*@ unsigned int ************************************************ */
849    unsigned int crc16;
850    unsigned int crctt;
851
852    bool had_to_resync = FALSE;
853
854    /*@ init  ******************************************************* */
855    datablock = malloc(TAPE_BLOCK_SIZE);
856    crc16 = 0;
857    crctt = 0;
858    size = orig_size;
859
860    /*@ end vars *************************************************** */
861
862    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
863    if (orig_size != temp_size && orig_size != -1) {
864        asprintf(&tmp,
865                 "output file's size should be %ld K but is apparently %ld K",
866                 (long) size >> 10, (long) temp_size >> 10);
867        log_to_screen(tmp);
868        paranoid_free(tmp);
869    }
870    if (ctrl_chr != BLK_START_FILE) {
871        wrong_marker(BLK_START_FILE, ctrl_chr);
872        return (1);
873    }
874    asprintf(&tmp, "Reading file from tape; writing to '%s'; %ld KB",
875             outfname, (long) size >> 10);
876    log_to_screen(tmp);
877    paranoid_free(tmp);
878
879    if (foutstream) {
880        fout = foutstream;
881    } else {
882        fout = fopen(outfname, "w");
883    }
884    if (!fout) {
885        log_OS_error(outfname);
886        log_to_screen("Cannot openout file");
887        return (1);
888    }
889    total_read_from_tape_for_this_file = 0;
890    for (noof_blocks = 0; size > 0;
891         noof_blocks++, size -=
892         bytes_to_write, total_read_from_tape_for_this_file +=
893         bytes_read) {
894        bytes_to_write =
895            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
896        bytes_to_read = TAPE_BLOCK_SIZE;
897        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
898        while (bytes_read < bytes_to_read) {    // next tape!
899//    crctt=crc16=0;
900            where_I_was_before_tape_change = size;
901            log_msg(4, "where_I_was_... = %lld",
902                    where_I_was_before_tape_change);
903            start_to_read_from_next_tape(bkpinfo);
904            log_msg(4, "Started reading from next tape.");
905            skip_incoming_files_until_we_find_this_one(temp_fname);
906            log_msg(4, "Skipped irrelevant files OK.");
907            for (size = orig_size; size > where_I_was_before_tape_change;
908                 size -= bytes_to_write) {
909                bytes_read =
910                    fread(datablock, 1, bytes_to_read, g_tape_stream);
911            }
912            log_msg(4, "'size' is now %lld (should be %lld)", size,
913                    where_I_was_before_tape_change);
914            log_to_screen("Successfully re-sync'd tape");
915            had_to_resync = TRUE;
916            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
917        }
918
919        (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
920
921#ifdef EXTRA_TAPE_CHECKSUMS
922        for (i = 0; i < (int) bytes_to_write; i++) {
923            ch = datablock[i];
924            crc16 = updcrcr(crc16, (unsigned) ch);
925            crctt = updcrc(crctt, (unsigned) ch);
926        }
927#endif
928    }
929    log_msg(6, "Total read from tape for this file = %lld",
930            total_read_from_tape_for_this_file);
931    log_msg(6, ".......................... Should be %lld", orig_size);
932    g_tape_posK += total_read_from_tape_for_this_file / 1024;
933    asprintf(&actual_cksum, "%04x%04x", crc16, crctt);
934    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
935    } else {
936        paranoid_fclose(fout);
937    }
938    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
939    if (ctrl_chr != BLK_STOP_FILE) {
940        wrong_marker(BLK_STOP_FILE, ctrl_chr);
941//      fatal_error("Bad marker"); // return(1);
942    }
943    if (strcmp(temp_cksum, actual_cksum)) {
944        asprintf(&tmp, "actual cksum=%s; recorded cksum=%s", actual_cksum,
945                 temp_cksum);
946        log_to_screen(tmp);
947        paranoid_free(tmp);
948
949        asprintf(&tmp, "%s (%ld K) is corrupt on tape", temp_fname,
950                 (long) orig_size >> 10);
951        log_to_screen(tmp);
952        paranoid_free(tmp);
953        retval++;
954    }
955    paranoid_free(actual_cksum);
956    paranoid_free(datablock);
957    paranoid_free(temp_fname);
958    paranoid_free(temp_cksum);
959    return (retval);
960}
961
962
963/**
964 * Read a header block from the currently opened stream (CD or tape).
965 * This block indicates the length of the following file (if it's file-related)
966 * the filename (if it's file-related), and the block type.
967 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
968 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
969 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
970 * @return 0 for success, nonzero for failure.
971 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
972 */
973int
974read_header_block_from_stream(long long *plen, char *filename,
975                              int *pcontrol_char)
976{
977
978    /*@ buffers ***************************************************** */
979    char *tempblock;
980
981    /*@ int ********************************************************* */
982    int i, retval;
983
984    /*@ end vars *************************************************** */
985
986    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
987
988    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
989        tempblock[i] = 0;
990    }
991    while (!(*pcontrol_char = tempblock[7000])) {
992        g_tape_posK +=
993            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
994                  g_tape_stream) / 1024;
995    }
996    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
997    if (strcmp(tempblock + 6000 + *pcontrol_char, "Mondolicious, baby")) {
998        log_it("Bad header block at %ld K", (long) g_tape_posK);
999    }
1000    /* the caller manages whether we should allocate or not
1001     * by setting the value to NULL (do not allocate) or
1002     * something (allocate) */
1003    if (filename != NULL) {
1004        asprintf(&filename, tempblock + 1000);
1005    }
1006    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1007        log_to_screen("I can't verify an aborted backup.");
1008        retval = 1;
1009    } else {
1010        retval = 0;
1011    }
1012    for (i = 1000; i < 1020; i++) {
1013        if (tempblock[i] < 32 || tempblock[i] > 126) {
1014            tempblock[i] = ' ';
1015        }
1016    }
1017    tempblock[i] = '\0';
1018    log_msg(6, "%s (fname=%s, size=%ld K)",
1019            marker_to_string(*pcontrol_char), tempblock + 1000,
1020            (long) (*plen) >> 10);
1021    paranoid_free(tempblock);
1022    return (retval);
1023}
1024
1025
1026/**
1027 * Add specified file/slice to the internal catalog of all archives written.
1028 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1029 * write the last [buffer size] MB from the catalog to the new tape, so we know
1030 * we have @e all archives on some CD/tape/whatever.
1031 * @param type The type of file we're cataloging (afioball, slice, something else)
1032 * @param number The fileset number or biggiefile number.
1033 * @param aux The slice number if it's a biggiefile, or any other additional info.
1034 * @param fn The original full pathname of the file we're recording.
1035 * @return The index of the record we just added.
1036 */
1037int register_in_tape_catalog(t_archtype type, int number, long aux,
1038                             char *fn)
1039{
1040    int last;
1041    char fname[MAX_TAPECAT_FNAME_LEN];
1042    char *p;
1043
1044    p = strrchr(fn, '/');
1045    if (p) {
1046        p++;
1047    } else {
1048        p = fn;
1049    }
1050    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1051    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1052    last = g_tapecatalog->entries;
1053    if (last >= MAX_TAPECATALOG_ENTRIES) {
1054        log_it
1055            ("Warning - can't log #%d in tape catalog - too many entries already",
1056             number);
1057        return (-1);
1058    }
1059    g_tapecatalog->el[last].type = type;
1060    g_tapecatalog->el[last].number = number;
1061    g_tapecatalog->el[last].aux = aux;
1062    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1063    strcpy(g_tapecatalog->el[last].fname, fname);
1064    g_tapecatalog->entries++;
1065    return (last);              // returns the index of the record we've jsut added
1066}
1067
1068
1069/**
1070 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1071 * (got SIGPIPE) or look like we will.
1072 * @param mediasize The size of the tape in megabytes.
1073 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1074 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1075 * autodetecting the size. Huh?
1076 */
1077bool
1078should_we_write_to_next_tape(long mediasize,
1079                             long long length_of_incoming_file)
1080{
1081    /*@ bool's ***************************************************** */
1082    bool we_need_a_new_tape = FALSE;
1083
1084    /*@ end vars *************************************************** */
1085
1086    if (mediasize == 0) {
1087        return (FALSE);
1088    }
1089    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1090        log_it("mediasize = %ld", mediasize);
1091        we_need_a_new_tape = TRUE;
1092        log_to_screen("Should have started a new tape/CD already");
1093    }
1094    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1095        mediasize - (SLICE_SIZE * 4 / 1024)) {
1096        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1097               mediasize);
1098        we_need_a_new_tape = TRUE;
1099    }
1100    return (we_need_a_new_tape);
1101}
1102
1103
1104/**
1105 * Seek through the stream until we find a header block where the NAME field matches
1106 * @p the_file_I_was_reading. This is useful if you've just started reading from
1107 * a new tape and want to find the file you were reading when the tape ended.
1108 * @param the_file_I_was_reading File name to look for.
1109 * @return 0 for success, nonzero for failure.
1110 */
1111int skip_incoming_files_until_we_find_this_one(char
1112                                               *the_file_I_was_reading)
1113{
1114    char *pA;
1115    char *pB;
1116    int res;
1117    int ctrl_chr;
1118    char *temp_fname = &res;    /* should NOT be NULL */
1119    char *datablock;
1120    long long temp_size, size;
1121    long bytes_to_write;
1122
1123    datablock = malloc(TAPE_BLOCK_SIZE);
1124    pB = strrchr(the_file_I_was_reading, '/');
1125    if (pB) {
1126        pB++;
1127    } else {
1128        pB = the_file_I_was_reading;
1129    }
1130    log_msg(1, "skip_incoming_..(%s)", pB);
1131    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1132    ctrl_chr = -1;
1133    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1134        res =
1135            read_header_block_from_stream(&temp_size, temp_fname,
1136                                          &ctrl_chr);
1137        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1138            break;
1139        }
1140        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1141        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1142        log_msg(3, "Still trying to re-sync w/ tape");
1143        paranoid_free(temp_fname);
1144        temp_fname = &res;
1145    }
1146    while (ctrl_chr != BLK_START_FILE) {
1147        res =
1148            read_header_block_from_stream(&temp_size, temp_fname,
1149                                          &ctrl_chr);
1150        if (ctrl_chr == BLK_START_FILE) {
1151            break;
1152        }
1153        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1154        wrong_marker(BLK_START_FILE, ctrl_chr);
1155        log_msg(3, "Still trying to re-sync w/ tape");
1156        /* Do not desallocate when the while condition is met */
1157        if (ctrl_chr != BLK_START_FILE) {
1158            paranoid_free(temp_fname);
1159            temp_fname = &res;
1160        }
1161    }
1162    pA = strrchr(temp_fname, '/');
1163    if (pA) {
1164        pA++;
1165    } else {
1166        pA = temp_fname;
1167    }
1168    pB = strrchr(the_file_I_was_reading, '/');
1169    if (pB) {
1170        pB++;
1171    } else {
1172        pB = the_file_I_was_reading;
1173    }
1174    while (strcmp(pA, pB)) {
1175        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1176                the_file_I_was_reading);
1177        for (size = temp_size; size > 0; size -= bytes_to_write) {
1178            bytes_to_write =
1179                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1180            // FIXME - needs error-checking and -catching
1181            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1182        }
1183
1184        paranoid_free(temp_fname);
1185        temp_fname = &res;
1186        res = read_header_block_from_stream(&temp_size, NULL, &ctrl_chr);
1187        if (ctrl_chr != BLK_STOP_FILE) {
1188            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1189        }
1190        res = read_header_block_from_stream(&temp_size, NULL, &ctrl_chr);
1191        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1192            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1193        }
1194        res = read_header_block_from_stream(&temp_size, NULL, &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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