source: trunk/mondo/mondo/common/libmondo-stream.c @ 171

Last change on this file since 171 was 171, checked in by bcornec, 14 years ago

memory management continues:

  • mondoarchive handled completely
  • bkpinfo, begining of dyn. alloc.
  • lot of changes around memory everywhere

=> even if it compiles, i'm pretty sure it doesn't work yet (even not tried)

  • Property svn:keywords set to Id
File size: 46.7 KB
Line 
1/* $Id: libmondo-stream.c 171 2005-12-08 16:20:29Z 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 171 2005-12-08 16:20:29Z 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 = (char *)&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 = (char *)&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 = (char *)&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
473    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
474    asprintf(&tmpdir, "%s/tmpfs/backcatalog", td);
475    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
476        type = fileset;
477    } else if (strstr(latest_fname, "slice")) {
478        type = biggieslice;
479    } else {
480        log_it("fname = %s", latest_fname);
481        fatal_error
482            ("Unknown type. Internal error in maintain_collection_of_recent_archives()");
483    }
484    mkdir(tmpdir, 0x700);
485    asprintf(&command, "cp -f %s %s", latest_fname, tmpdir);
486    if (run_program_and_log_output(command, 6)) {
487        log_it("Warning - failed to copy %s to backcatalog at %s",
488               latest_fname, tmpdir);
489    }
490    paranoid_free(command);
491
492    last = g_tapecatalog->entries - 1;
493    if (last <= 0) {
494        iamhere("Too early to start deleting from collection.");
495        return (0);
496    }
497    final_alleged_writeK = g_tapecatalog->el[last].tape_posK;
498    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
499    for (curr = last; curr >= 0; curr--) {
500        cposK = g_tapecatalog->el[curr].tape_posK;
501        if (cposK < final_projected_certain_writeK) {
502            final_actually_certain_writeK = cposK;
503            break;
504        }
505    }
506    if (curr < 0) {
507        iamhere
508            ("Not far enough into tape to start deleting old archives from collection.");
509        return (0);
510    }
511//  log_it( "There are %lld KB (more than %d KB) in my backcatalog", final_alleged_writeK - final_actually_certain_writeK, bufsize_K);
512
513    for (i = curr - 1; i >= 0 && curr - i < 10; i--) {
514        asprintf(&old_fname, "%s/%s", tmpdir, g_tapecatalog->el[i].fname);
515        unlink(old_fname);
516        paranoid_free(old_fname);
517    }
518    paranoid_free(tmpdir);
519    return (0);
520}
521
522
523/**
524 * Open the CD stream for input.
525 * @param bkpinfo The backup information structure. Passed to openin_tape().
526 * @return 0 for success, nonzero for failure.
527 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
528 */
529int openin_cdstream(struct s_bkpinfo *bkpinfo)
530{
531    return (openin_tape(bkpinfo));
532}
533
534
535/**
536 * FIFO used to read/write to the tape device.
537 * @bug This seems obsolete now that we call an external @c buffer program. Please look onto this.
538 */
539char g_tape_fifo[MAX_STR_LEN];
540
541int set_tape_block_size_with_mt(char *tapedev,
542                                long internal_tape_block_size)
543{
544    char *tmp;
545    int res;
546
547    if (strncmp(tapedev, "/dev/", 5)) {
548        log_msg(1,
549                "Not using 'mt setblk'. This isn't an actual /dev entry.");
550        return (0);
551    }
552    asprintf(&tmp, "mt -f %s setblk %ld", tapedev,
553             internal_tape_block_size);
554    res = run_program_and_log_output(tmp, 3);
555    paranoid_free(tmp);
556    return (res);
557}
558
559
560/**
561 * Open the tape device for input.
562 * @param bkpinfo The backup information structure. Fields used:
563 * - @c bkpinfo->media_device
564 * - @c bkpinfo->tmpdir
565 * @return 0 for success, nonzero for failure.
566 * @note This will also work with a cdstream for now, but don't count on this behavior.
567 */
568int openin_tape(struct s_bkpinfo *bkpinfo)
569{
570    /*@ buffer ***************************************************** */
571    char *datablock;
572    char *tmp;
573    char old_cwd[MAX_STR_LEN];
574    char *outfname;
575    /*@ int ******************************************************* */
576    int i;
577    int j;
578    int res;
579    long length, templong;
580    size_t k;
581    int retval = 0;
582    int ctrl_chr;
583
584    /*@ long long ************************************************* */
585    long long size;
586
587    /*@ pointers ************************************************** */
588    FILE *fout;
589
590    /*@ end vars *************************************************** */
591
592    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
593    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
594        fatal_error("Cannot alloc mem for tape catalog");
595    }
596    g_tapecatalog->entries = 0;
597    g_tape_posK = 0;
598    if (g_tape_stream) {
599        log_it("FYI - I won't 'openin' the tape. It's already open.");
600        return (0);
601    }
602    insist_on_this_tape_number(1);
603    asprintf(&outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
604    make_hole_for_file(outfname);
605
606    set_tape_block_size_with_mt(bkpinfo->media_device,
607                                bkpinfo->internal_tape_block_size);
608
609    log_it("Opening IN tape");
610    if (!
611        (g_tape_stream =
612         open_device_via_buffer(bkpinfo->media_device, 'r',
613                                bkpinfo->internal_tape_block_size))) {
614        log_OS_error(g_tape_fifo);
615        log_to_screen("Cannot openin stream device");
616        return (1);
617    }
618    log_to_screen("Reading stream");
619    log_it("stream device = '%s'", bkpinfo->media_device);
620/* skip data disks */
621    open_evalcall_form("Skipping data disks on stream");
622    log_to_screen("Skipping data disks on stream");
623    if (!(fout = fopen(outfname, "w"))) {
624        log_OS_error(outfname);
625        log_to_screen("Cannot openout datadisk all.tar.gz file");
626        return (-1);
627    }
628    if (!(datablock = (char *) malloc(256 * 1024))) {
629        log_to_screen("Unable to malloc 256*1024");
630        exit(1);
631    }
632    for (i = 0; i < 32; i++) {
633        for (j = 0; j < 4; j++) {
634            for (length = 0, k = 0; length < 256 * 1024; length += k) {
635                k = fread(datablock + length, 1, 256 * 1024 - length,
636                          g_tape_stream);
637            }
638            (void) fwrite(datablock, 1, (size_t) length, fout);
639            g_tape_posK += length / 1024;
640        }
641        if (i > 8)              // otherwise, 'buffer' distorts calculations
642        {
643            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
644            update_evalcall_form((int) (templong));
645        }
646    }
647    paranoid_fclose(fout);
648    paranoid_free(datablock);
649    /* find initial blocks */
650    res = read_header_block_from_stream(&size, NULL, &ctrl_chr);
651    retval += res;
652    if (ctrl_chr != BLK_START_OF_TAPE) {
653        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
654    }
655    res = read_header_block_from_stream(&size, NULL, &ctrl_chr);
656    retval += res;
657    if (ctrl_chr != BLK_START_OF_BACKUP) {
658        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
659    }
660    close_evalcall_form();
661    log_it("Saved all.tar.gz to '%s'", outfname);
662    (void) getcwd(old_cwd, MAX_STR_LEN);
663    chdir(bkpinfo->tmpdir);
664    asprintf(&tmp, "tar -zxf %s tmp/mondo-restore.cfg 2> /dev/null",
665             outfname);
666    paranoid_system(tmp);
667    paranoid_free(tmp);
668    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
669    chdir(old_cwd);
670    unlink(outfname);
671    paranoid_free(outfname);
672    return (retval);
673}
674
675
676/**
677 * Start writing to a CD stream.
678 * @param cddev The CD device to openout via cdrecord.
679 * @param speed The speed to write at.
680 * @return 0 for success, nonzero for failure.
681 * @note This should be called only from backup processes.
682 */
683int openout_cdstream(char *cddev, int speed)
684{
685    /*@ buffers ***************************************************** */
686    char *command;
687
688    /*@ end vars *************************************************** */
689
690    /*  add 'dummy' if testing */
691    asprintf(&command,
692             "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
693             cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
694    /*  initialise the catalog */
695    g_current_media_number = 1;
696    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
697        fatal_error("Cannot alloc mem for tape catalog");
698    }
699    g_tapecatalog->entries = 0;
700    /* log stuff */
701    log_it("Opening OUT cdstream with the command");
702    log_it(command);
703    /*  log_it("Let's see what happens, shall we?"); */
704    g_tape_stream = popen(command, "w");
705    paranoid_free(command);
706    if (g_tape_stream) {
707        return (0);
708    } else {
709        log_to_screen("Failed to openout to cdstream (fifo)");
710        return (1);
711    }
712}
713
714
715/**
716 * Start writing to a tape device for the backup.
717 * @param tapedev The tape device to open for writing.
718 * @return 0 for success, nonzero for failure.
719 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
720 * EXISTING DATA on the tape!
721 */
722int openout_tape(char *tapedev, long internal_tape_block_size)
723{
724    g_current_media_number = 1;
725    if (g_tape_stream) {
726        log_it("FYI - I won't 'openout' the tape. It's already open.");
727        return (0);
728    }
729    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
730        fatal_error("Cannot alloc mem for tape catalog");
731    }
732    g_tapecatalog->entries = 0;
733    g_tape_posK = 0;
734
735    set_tape_block_size_with_mt(tapedev, internal_tape_block_size);
736    log_it("Opening OUT tape");
737    if (!
738        (g_tape_stream =
739         open_device_via_buffer(tapedev, 'w', internal_tape_block_size))) {
740        log_OS_error(g_tape_fifo);
741        log_to_screen("Cannot openin stream device");
742        return (1);
743    }
744    return (0);
745}
746
747
748/**
749 * Copy a file from the opened stream (CD or tape) to @p outfile.
750 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
751 * @param outfile The file to write to.
752 * @param size The size of the file in the input stream.
753 * @return 0 for success, nonzero for failure.
754 */
755int
756read_file_from_stream_to_file(struct s_bkpinfo *bkpinfo, char *outfile,
757                              long long size)
758{
759
760    /*@ int ******************************************************** */
761    int res;
762
763    /*@ end vars *************************************************** */
764
765    res = read_file_from_stream_FULL(bkpinfo, outfile, NULL, size);
766
767    return (res);
768}
769
770
771/**
772 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
773 * by @p fout.
774 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
775 * @param fout The stream to write the file to.
776 * @param size The size of the file in bytes.
777 * @return 0 for success, nonzero for failure.
778 */
779int
780read_file_from_stream_to_stream(struct s_bkpinfo *bkpinfo, FILE * fout,
781                                long long size)
782{
783
784    /*@ int ******************************************************** */
785    int res;
786
787    /*@ end vars *************************************************** */
788
789    res = read_file_from_stream_FULL(bkpinfo, NULL, fout, size);
790    return (res);
791}
792
793
794/**
795 * Copy a file from the currently opened stream (CD or tape) to either a
796 * @c FILE pointer indicating a currently-opened file, or a filename indicating
797 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
798 * and read_file_from_stream_to_stream() are wrappers for.
799 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
800 * @param outfname If non-NULL, write to this file.
801 * @param foutstream If non-NULL, write to this stream.
802 * @param orig_size The original length of the file in bytes.
803 * @return 0 for success, nonzero for failure.
804 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
805 */
806int
807read_file_from_stream_FULL(struct s_bkpinfo *bkpinfo, char *outfname,
808                           FILE * foutstream, long long orig_size)
809{
810    /*@ buffers ***************************************************** */
811    char *tmp;
812    char *datablock;
813    char *temp_fname = (char *)bkpinfo; /* Should NOT be NULL */
814    char *temp_cksum = (char *)bkpinfo; /* Should NOT be NULL */
815    char *actual_cksum;
816
817    /*@ int ********************************************************* */
818    int retval = 0;
819#ifdef EXTRA_TAPE_CHECKSUMS
820    int i, ch;
821#endif
822    int noof_blocks;
823    int ctrl_chr;
824    int res;
825    /*@ pointers **************************************************** */
826    FILE *fout;
827
828    /*@ long    ***************************************************** */
829    long bytes_to_write = 0;
830
831    /*@ long long *************************************************** */
832    long long temp_size, size;
833    long bytes_read, bytes_to_read;
834    long long total_read_from_tape_for_this_file = 0;
835    long long where_I_was_before_tape_change = 0;
836    /*@ unsigned int ************************************************ */
837    unsigned int crc16;
838    unsigned int crctt;
839
840    bool had_to_resync = FALSE;
841
842    /*@ init  ******************************************************* */
843    datablock = malloc(TAPE_BLOCK_SIZE);
844    crc16 = 0;
845    crctt = 0;
846    size = orig_size;
847
848    /*@ end vars *************************************************** */
849
850    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
851    if (orig_size != temp_size && orig_size != -1) {
852        asprintf(&tmp,
853                 "output file's size should be %ld K but is apparently %ld K",
854                 (long) size >> 10, (long) temp_size >> 10);
855        log_to_screen(tmp);
856        paranoid_free(tmp);
857    }
858    if (ctrl_chr != BLK_START_FILE) {
859        wrong_marker(BLK_START_FILE, ctrl_chr);
860        return (1);
861    }
862    asprintf(&tmp, "Reading file from tape; writing to '%s'; %ld KB",
863             outfname, (long) size >> 10);
864    log_to_screen(tmp);
865    paranoid_free(tmp);
866
867    if (foutstream) {
868        fout = foutstream;
869    } else {
870        fout = fopen(outfname, "w");
871    }
872    if (!fout) {
873        log_OS_error(outfname);
874        log_to_screen("Cannot openout file");
875        return (1);
876    }
877    total_read_from_tape_for_this_file = 0;
878    for (noof_blocks = 0; size > 0;
879         noof_blocks++, size -=
880         bytes_to_write, total_read_from_tape_for_this_file +=
881         bytes_read) {
882        bytes_to_write =
883            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
884        bytes_to_read = TAPE_BLOCK_SIZE;
885        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
886        while (bytes_read < bytes_to_read) {    // next tape!
887//    crctt=crc16=0;
888            where_I_was_before_tape_change = size;
889            log_msg(4, "where_I_was_... = %lld",
890                    where_I_was_before_tape_change);
891            start_to_read_from_next_tape(bkpinfo);
892            log_msg(4, "Started reading from next tape.");
893            skip_incoming_files_until_we_find_this_one(temp_fname);
894            log_msg(4, "Skipped irrelevant files OK.");
895            for (size = orig_size; size > where_I_was_before_tape_change;
896                 size -= bytes_to_write) {
897                bytes_read =
898                    fread(datablock, 1, bytes_to_read, g_tape_stream);
899            }
900            log_msg(4, "'size' is now %lld (should be %lld)", size,
901                    where_I_was_before_tape_change);
902            log_to_screen("Successfully re-sync'd tape");
903            had_to_resync = TRUE;
904            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
905        }
906
907        (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
908
909#ifdef EXTRA_TAPE_CHECKSUMS
910        for (i = 0; i < (int) bytes_to_write; i++) {
911            ch = datablock[i];
912            crc16 = updcrcr(crc16, (unsigned) ch);
913            crctt = updcrc(crctt, (unsigned) ch);
914        }
915#endif
916    }
917    log_msg(6, "Total read from tape for this file = %lld",
918            total_read_from_tape_for_this_file);
919    log_msg(6, ".......................... Should be %lld", orig_size);
920    g_tape_posK += total_read_from_tape_for_this_file / 1024;
921    asprintf(&actual_cksum, "%04x%04x", crc16, crctt);
922    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
923    } else {
924        paranoid_fclose(fout);
925    }
926    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
927    if (ctrl_chr != BLK_STOP_FILE) {
928        wrong_marker(BLK_STOP_FILE, ctrl_chr);
929//      fatal_error("Bad marker"); // return(1);
930    }
931    if (strcmp(temp_cksum, actual_cksum)) {
932        asprintf(&tmp, "actual cksum=%s; recorded cksum=%s", actual_cksum,
933                 temp_cksum);
934        log_to_screen(tmp);
935        paranoid_free(tmp);
936
937        asprintf(&tmp, "%s (%ld K) is corrupt on tape", temp_fname,
938                 (long) orig_size >> 10);
939        log_to_screen(tmp);
940        paranoid_free(tmp);
941        retval++;
942    }
943    paranoid_free(actual_cksum);
944    paranoid_free(datablock);
945    paranoid_free(temp_fname);
946    paranoid_free(temp_cksum);
947    return (retval);
948}
949
950
951/**
952 * Read a header block from the currently opened stream (CD or tape).
953 * This block indicates the length of the following file (if it's file-related)
954 * the filename (if it's file-related), and the block type.
955 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
956 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
957 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
958 * @return 0 for success, nonzero for failure.
959 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
960 */
961int
962read_header_block_from_stream(long long *plen, char *filename,
963                              int *pcontrol_char)
964{
965
966    /*@ buffers ***************************************************** */
967    char *tempblock;
968
969    /*@ int ********************************************************* */
970    int i, retval;
971
972    /*@ end vars *************************************************** */
973
974    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
975
976    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
977        tempblock[i] = 0;
978    }
979    while (!(*pcontrol_char = tempblock[7000])) {
980        g_tape_posK +=
981            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
982                  g_tape_stream) / 1024;
983    }
984    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
985    if (strcmp(tempblock + 6000 + *pcontrol_char, "Mondolicious, baby")) {
986        log_it("Bad header block at %ld K", (long) g_tape_posK);
987    }
988    /* the caller manages whether we should allocate or not
989     * by setting the value to NULL (do not allocate) or
990     * something (allocate) */
991    if (filename != NULL) {
992        asprintf(&filename, tempblock + 1000);
993    }
994    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
995        log_to_screen("I can't verify an aborted backup.");
996        retval = 1;
997    } else {
998        retval = 0;
999    }
1000    for (i = 1000; i < 1020; i++) {
1001        if (tempblock[i] < 32 || tempblock[i] > 126) {
1002            tempblock[i] = ' ';
1003        }
1004    }
1005    tempblock[i] = '\0';
1006    log_msg(6, "%s (fname=%s, size=%ld K)",
1007            marker_to_string(*pcontrol_char), tempblock + 1000,
1008            (long) (*plen) >> 10);
1009    paranoid_free(tempblock);
1010    return (retval);
1011}
1012
1013
1014/**
1015 * Add specified file/slice to the internal catalog of all archives written.
1016 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1017 * write the last [buffer size] MB from the catalog to the new tape, so we know
1018 * we have @e all archives on some CD/tape/whatever.
1019 * @param type The type of file we're cataloging (afioball, slice, something else)
1020 * @param number The fileset number or biggiefile number.
1021 * @param aux The slice number if it's a biggiefile, or any other additional info.
1022 * @param fn The original full pathname of the file we're recording.
1023 * @return The index of the record we just added.
1024 */
1025int register_in_tape_catalog(t_archtype type, int number, long aux,
1026                             char *fn)
1027{
1028    int last;
1029    char fname[MAX_TAPECAT_FNAME_LEN];
1030    char *p;
1031
1032    p = strrchr(fn, '/');
1033    if (p) {
1034        p++;
1035    } else {
1036        p = fn;
1037    }
1038    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1039    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1040    last = g_tapecatalog->entries;
1041    if (last >= MAX_TAPECATALOG_ENTRIES) {
1042        log_it
1043            ("Warning - can't log #%d in tape catalog - too many entries already",
1044             number);
1045        return (-1);
1046    }
1047    g_tapecatalog->el[last].type = type;
1048    g_tapecatalog->el[last].number = number;
1049    g_tapecatalog->el[last].aux = aux;
1050    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1051    strcpy(g_tapecatalog->el[last].fname, fname);
1052    g_tapecatalog->entries++;
1053    return (last);              // returns the index of the record we've jsut added
1054}
1055
1056
1057/**
1058 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1059 * (got SIGPIPE) or look like we will.
1060 * @param mediasize The size of the tape in megabytes.
1061 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1062 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1063 * autodetecting the size. Huh?
1064 */
1065bool
1066should_we_write_to_next_tape(long mediasize,
1067                             long long length_of_incoming_file)
1068{
1069    /*@ bool's ***************************************************** */
1070    bool we_need_a_new_tape = FALSE;
1071
1072    /*@ end vars *************************************************** */
1073
1074    if (mediasize == 0) {
1075        return (FALSE);
1076    }
1077    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1078        log_it("mediasize = %ld", mediasize);
1079        we_need_a_new_tape = TRUE;
1080        log_to_screen("Should have started a new tape/CD already");
1081    }
1082    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1083        mediasize - (SLICE_SIZE * 4 / 1024)) {
1084        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1085               mediasize);
1086        we_need_a_new_tape = TRUE;
1087    }
1088    return (we_need_a_new_tape);
1089}
1090
1091
1092/**
1093 * Seek through the stream until we find a header block where the NAME field matches
1094 * @p the_file_I_was_reading. This is useful if you've just started reading from
1095 * a new tape and want to find the file you were reading when the tape ended.
1096 * @param the_file_I_was_reading File name to look for.
1097 * @return 0 for success, nonzero for failure.
1098 */
1099int skip_incoming_files_until_we_find_this_one(char
1100                                               *the_file_I_was_reading)
1101{
1102    char *pA;
1103    char *pB;
1104    int res;
1105    int ctrl_chr;
1106    char *temp_fname = (char *)&res;    /* should NOT be NULL */
1107    char *datablock;
1108    long long temp_size, size;
1109    long bytes_to_write;
1110
1111    datablock = malloc(TAPE_BLOCK_SIZE);
1112    pB = strrchr(the_file_I_was_reading, '/');
1113    if (pB) {
1114        pB++;
1115    } else {
1116        pB = the_file_I_was_reading;
1117    }
1118    log_msg(1, "skip_incoming_..(%s)", pB);
1119    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1120    ctrl_chr = -1;
1121    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1122        res =
1123            read_header_block_from_stream(&temp_size, temp_fname,
1124                                          &ctrl_chr);
1125        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1126            break;
1127        }
1128        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1129        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1130        log_msg(3, "Still trying to re-sync w/ tape");
1131        paranoid_free(temp_fname);
1132        temp_fname = (char *)&res;
1133    }
1134    while (ctrl_chr != BLK_START_FILE) {
1135        res =
1136            read_header_block_from_stream(&temp_size, temp_fname,
1137                                          &ctrl_chr);
1138        if (ctrl_chr == BLK_START_FILE) {
1139            break;
1140        }
1141        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1142        wrong_marker(BLK_START_FILE, ctrl_chr);
1143        log_msg(3, "Still trying to re-sync w/ tape");
1144        /* Do not desallocate when the while condition is met */
1145        if (ctrl_chr != BLK_START_FILE) {
1146            paranoid_free(temp_fname);
1147            temp_fname = (char *)&res;
1148        }
1149    }
1150    pA = strrchr(temp_fname, '/');
1151    if (pA) {
1152        pA++;
1153    } else {
1154        pA = temp_fname;
1155    }
1156    pB = strrchr(the_file_I_was_reading, '/');
1157    if (pB) {
1158        pB++;
1159    } else {
1160        pB = the_file_I_was_reading;
1161    }
1162    while (strcmp(pA, pB)) {
1163        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1164                the_file_I_was_reading);
1165        for (size = temp_size; size > 0; size -= bytes_to_write) {
1166            bytes_to_write =
1167                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1168            // FIXME - needs error-checking and -catching
1169            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1170        }
1171
1172        paranoid_free(temp_fname);
1173        temp_fname = (char *)&res;
1174        res = read_header_block_from_stream(&temp_size, NULL, &ctrl_chr);
1175        if (ctrl_chr != BLK_STOP_FILE) {
1176            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1177        }
1178        res = read_header_block_from_stream(&temp_size, NULL, &ctrl_chr);
1179        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1180            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1181        }
1182        res = read_header_block_from_stream(&temp_size, NULL, &ctrl_chr);
1183        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1184            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1185        }
1186        res =
1187            read_header_block_from_stream(&temp_size, temp_fname,
1188                                          &ctrl_chr);
1189        if (ctrl_chr != BLK_START_FILE) {
1190            wrong_marker(BLK_START_FILE, ctrl_chr);
1191        }
1192        pA = strrchr(temp_fname, '/');
1193        if (pA) {
1194            pA++;
1195        } else {
1196            pA = temp_fname;
1197        }
1198        /* BERLIOS: useless ?
1199           pB = strrchr(the_file_I_was_reading, '/');
1200           if (pB) {
1201           pB++;
1202           } else {
1203           pB = the_file_I_was_reading;
1204           }
1205         */
1206    }
1207    log_msg(2, "Reading %s (it matches %s)", temp_fname,
1208            the_file_I_was_reading);
1209    paranoid_free(temp_fname);
1210    paranoid_free(datablock);
1211    return (0);
1212}
1213
1214
1215/**
1216 * Start to read from the next tape. Assumes the user has already inserted it.
1217 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1218 * @return 0 for success, nonzero for failure.
1219 */
1220int start_to_read_from_next_tape(struct s_bkpinfo *bkpinfo)
1221{
1222    /*@ int ********************************************************* */
1223    int res = 0;
1224    int ctrlchr;
1225    long long temp_size;
1226    /*@ end vars *************************************************** */
1227
1228    paranoid_pclose(g_tape_stream);
1229    system("sync");
1230    system("sync");
1231    system("sync");
1232    log_it("Next tape requested.");
1233    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1234    log_it("Opening IN the next tape");
1235    if (!
1236        (g_tape_stream =
1237         open_device_via_buffer(bkpinfo->media_device, 'r',
1238                                bkpinfo->internal_tape_block_size))) {
1239        log_OS_error(g_tape_fifo);
1240        log_to_screen("Cannot openin stream device");
1241        return (1);
1242    }
1243    g_tape_posK = 0;
1244    g_sigpipe = FALSE;
1245    res += read_header_block_from_stream(&temp_size, NULL, &ctrlchr);   /* just in case */
1246    if (ctrlchr != BLK_START_OF_TAPE) {
1247        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1248    }
1249    res += read_header_block_from_stream(&temp_size, NULL, &ctrlchr);   /* just in case */
1250    if (ctrlchr != BLK_START_OF_BACKUP) {
1251        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1252    } else {
1253        log_msg(3, "Next tape opened OK. Whoopee!");
1254    }
1255    return (res);
1256}
1257
1258
1259/**
1260 * Start to write to the next tape. Assume the user has already inserted it.
1261 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1262 * @return 0 for success, nonzero for failure.
1263 */
1264int start_to_write_to_next_tape(struct s_bkpinfo *bkpinfo)
1265{
1266    int res = 0;
1267    char *command;
1268
1269    paranoid_pclose(g_tape_stream);
1270    system("sync");
1271    system("sync");
1272    system("sync");
1273    log_it("New tape requested.");
1274    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1275    if (g_current_media_number > MAX_NOOF_MEDIA) {
1276        res++;
1277        log_to_screen("Too many tapes. Man, you need to use nfs!");
1278    }
1279    if (bkpinfo->backup_media_type == cdstream) {
1280        asprintf(&command,
1281                 "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1282                 bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE,
1283                 MONDO_LOGFILE);
1284        log_it("Opening OUT to next CD with the command");
1285        log_it(command);
1286        log_it("Let's see what happens, shall we?");
1287        g_tape_stream = popen(command, "w");
1288        paranoid_free(command);
1289        if (!g_tape_stream) {
1290            log_to_screen("Failed to openout to cdstream (fifo)");
1291            return (1);
1292        }
1293    } else {
1294        log_it("Opening OUT to next tape");
1295        if (!
1296            (g_tape_stream =
1297             open_device_via_buffer(bkpinfo->media_device, 'w',
1298                                    bkpinfo->internal_tape_block_size))) {
1299            log_OS_error(g_tape_fifo);
1300            log_to_screen("Cannot openin stream device");
1301            return (1);
1302        }
1303    }
1304    g_tape_posK = 0;
1305    g_sigpipe = FALSE;
1306    res += write_header_block_to_stream(0, "start-of-tape", BLK_START_OF_TAPE); /* just in case */
1307    res += write_header_block_to_stream(0, "start-of-backup", BLK_START_OF_BACKUP); /* just in case */
1308    return (res);
1309}
1310
1311
1312/**
1313 * Write a bufferfull of the most recent archives to the tape. The
1314 * rationale behind this is a bit complex. If the previous tape ended
1315 * suddenly (EOF or otherwise) some archives were probably left in the
1316 * buffer. That means that Mondo thinks they have been written, but
1317 * the external binary @c buffer has not actually written them. So to
1318 * be safe, we start the new tape by writing the last bufferfull from
1319 * the old one. This insures that all archives will be on at least
1320 * one tape. Sounds inelegant, but it works.
1321 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1322 * @return 0 for success, nonzero for failure.
1323 */
1324int write_backcatalog_to_tape(struct s_bkpinfo *bkpinfo)
1325{
1326    int i, last, res = 0;
1327    char *fname;
1328
1329    log_msg(2, "I am now writing back catalog to tape");
1330    last = g_tapecatalog->entries - 1;
1331    for (i = 0; i <= last; i++) {
1332        asprintf(&fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir,
1333                 g_tapecatalog->el[i].fname);
1334        if (!does_file_exist(fname)) {
1335            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1336        } else {
1337            write_header_block_to_stream(length_of_file(fname),
1338                                         "start-backcatalog-afio-or-slice",
1339                                         BLK_START_AN_AFIO_OR_SLICE);
1340            log_msg(2, "Writing %s", fname);
1341            if (write_file_to_stream_from_file(bkpinfo, fname)) {
1342                res++;
1343                log_msg(2, "%s failed", fname);
1344            }
1345            if (i != last) {
1346                write_header_block_to_stream(0,
1347                                             "stop-backcatalog-afio-or-slice",
1348                                             BLK_STOP_AN_AFIO_OR_SLICE);
1349            }
1350        }
1351        paranoid_free(fname);
1352    }
1353    log_msg(2, "Finished writing back catalog to tape");
1354    return (res);
1355}
1356
1357
1358/**
1359 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1360 * @param fname The path to all.tar.gz.
1361 * @return 0 for success, nonzero for failure.
1362 */
1363int write_data_disks_to_stream(char *fname)
1364{
1365    /*@ pointers *************************************************** */
1366    FILE *fin;
1367    char *tmp;
1368
1369    /*@ long ******************************************************* */
1370    long m = -1;
1371    long templong;
1372
1373    /*@ int ******************************************************** */
1374    int i, j;
1375
1376    /*@ buffers **************************************************** */
1377    char tempblock[256 * 1024];
1378
1379    /*@ end vars *************************************************** */
1380
1381    open_evalcall_form("Writing data disks to tape");
1382    log_to_screen("Writing data disks to tape");
1383    log_it("Data disks = %s", fname);
1384    if (!does_file_exist(fname)) {
1385        asprintf(&tmp, "Cannot find %s", fname);
1386        log_to_screen(tmp);
1387        paranoid_free(tmp);
1388        return (1);
1389    }
1390    if (!(fin = fopen(fname, "r"))) {
1391        log_OS_error(fname);
1392        fatal_error("Cannot openin the data disk");
1393    }
1394    for (i = 0; i < 32; i++) {  /* 32MB */
1395        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1396            if (!feof(fin)) {
1397                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1398            } else {
1399                m = 0;
1400            }
1401            for (; m < 256 * 1024; m++) {
1402                tempblock[m] = '\0';
1403            }
1404            g_tape_posK +=
1405                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1406        }
1407        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1408        {
1409            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1410            update_evalcall_form((int) (templong));
1411        }
1412    }
1413    paranoid_fclose(fin);
1414    close_evalcall_form();
1415    return (0);
1416}
1417
1418
1419/**
1420 * Copy @p infile to the opened stream (CD or tape).
1421 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1422 * @param infile The file to write to the stream.
1423 * @return 0 for success, nonzero for failure.
1424 */
1425int write_file_to_stream_from_file(struct s_bkpinfo *bkpinfo, char *infile)
1426{
1427    /*@ buffers **************************************************** */
1428    char *tmp;
1429    char datablock[TAPE_BLOCK_SIZE];
1430    char *checksum;
1431    char *infile_basename;
1432
1433    /*@ int ******************************************************** */
1434    int retval = 0;
1435    int noof_blocks;
1436
1437    /*  unsigned int ch; */
1438    unsigned int crc16;
1439    unsigned int crctt;
1440
1441    /*@ pointers *************************************************** */
1442    FILE *fin;
1443    char *p;
1444
1445    /*@ long ******************************************************* */
1446    long bytes_to_read = 0;
1447    long i;
1448
1449    /*@ long long ************************************************** */
1450    long long filesize;
1451
1452#ifdef EXTRA_TAPE_CHECKSUMS
1453    int ch;
1454#endif
1455
1456    /*@ initialize ************************************************ */
1457    crc16 = 0;
1458    crctt = 0;
1459
1460    /*@ end vars *************************************************** */
1461
1462    infile_basename = strrchr(infile, '/');
1463    if (infile_basename) {
1464        infile_basename++;
1465    } else {
1466        infile_basename = infile;
1467    }
1468    filesize = length_of_file(infile);
1469    if (should_we_write_to_next_tape
1470        (bkpinfo->media_size[g_current_media_number], filesize)) {
1471        start_to_write_to_next_tape(bkpinfo);
1472        write_backcatalog_to_tape(bkpinfo);
1473    }
1474    p = strrchr(infile, '/');
1475    if (!p) {
1476        p = infile;
1477    } else {
1478        p++;
1479    }
1480    asprintf(&tmp, "Writing file '%s' to tape (%ld KB)", p,
1481             (long) filesize >> 10);
1482    log_it(tmp);
1483    paranoid_free(tmp);
1484
1485    write_header_block_to_stream(filesize, infile_basename,
1486                                 BLK_START_FILE);
1487//go_here_to_restart_saving_of_file:
1488    if (!(fin = fopen(infile, "r"))) {
1489        log_OS_error(infile);
1490        return (1);
1491    }
1492    for (noof_blocks = 0; filesize > 0;
1493         noof_blocks++, filesize -= bytes_to_read) {
1494        if (filesize < TAPE_BLOCK_SIZE) {
1495            bytes_to_read = (long) filesize;
1496            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1497                datablock[i] = '\0';
1498            }
1499        } else {
1500            bytes_to_read = TAPE_BLOCK_SIZE;
1501        }
1502        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1503        g_tape_posK += fwrite(datablock, 1, /*bytes_to_read */
1504                              (size_t) TAPE_BLOCK_SIZE,
1505                              g_tape_stream) / 1024;
1506        if (g_sigpipe) {
1507            iamhere("Sigpipe occurred recently. I'll start a new tape.");
1508            fclose(fin);
1509            g_sigpipe = FALSE;
1510            start_to_write_to_next_tape(bkpinfo);
1511            write_backcatalog_to_tape(bkpinfo); // kinda-sorta recursive :)
1512            return (0);
1513        }
1514#ifdef EXTRA_TAPE_CHECKSUMS
1515        for (i = 0; i < bytes_to_read; i++) {
1516            ch = datablock[i];
1517            crc16 = updcrcr(crc16, (unsigned) ch);
1518            crctt = updcrc(crctt, (unsigned) ch);
1519        }
1520#endif
1521    }
1522    paranoid_fclose(fin);
1523    asprintf(&checksum, "%04x%04x", crc16, crctt);
1524    write_header_block_to_stream(g_current_media_number, checksum,
1525                                 BLK_STOP_FILE);
1526    paranoid_free(checksum);
1527//  log_it("File '%s' written to tape.", infile);
1528    return (retval);
1529}
1530
1531
1532/**
1533 * Write a header block to the opened stream (CD or tape).
1534 * @param length_of_incoming_file The length to store in the header block.
1535 * Usually matters only if this is a file-related header, in which case it should
1536 * be the length of the file that will follow.
1537 * @param filename The filename to store in the header block. Usually matters
1538 * only if this is a file-related header, in which case this should be the name
1539 * if the file that will follow.
1540 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1541 * @return 0 for success, nonzero for failure.
1542 */
1543int
1544write_header_block_to_stream(long long length_of_incoming_file,
1545                             char *filename, int control_char)
1546{
1547    /*@ buffers **************************************************** */
1548    char tempblock[TAPE_BLOCK_SIZE];
1549    char *tmp;
1550    char *p;
1551
1552    /*@ int ******************************************************** */
1553    int i;
1554
1555    /*@ long long ************************************************** */
1556    long long olen;
1557
1558    /*@ end vars *************************************************** */
1559
1560
1561    olen = length_of_incoming_file;
1562    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1563    if (!p) {
1564        p = filename;
1565    } else {
1566        p++;
1567    }
1568    if (!g_tape_stream) {
1569        log_to_screen
1570            ("You're not backing up to tape. Why write a tape header?");
1571        return (1);
1572    }
1573    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1574        tempblock[i] = 0;
1575    }
1576    sprintf(tempblock + 6000 + control_char, "Mondolicious, baby");
1577    tempblock[7000] = control_char;
1578    memcpy(tempblock + 7001, (char *) &olen, sizeof(long long));
1579    strcpy(tempblock + 1000, filename);
1580    g_tape_posK +=
1581        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1582               g_tape_stream) / 1024;
1583    asprintf(&tmp, "%s (fname=%s, size=%ld K)",
1584             marker_to_string(control_char), p,
1585             (long) length_of_incoming_file >> 10);
1586    log_msg(6, tmp);
1587    paranoid_free(tmp);
1588    return (0);
1589}
1590
1591
1592/**
1593 * Log (to screen) an erroneous marker, along with what it should have been.
1594 * @param should_be What we were expecting.
1595 * @param it_is What we got.
1596 */
1597void wrong_marker(int should_be, int it_is)
1598{
1599    /*@ buffer ***************************************************** */
1600    char *tmp;
1601
1602
1603    /*@ end vars *************************************************** */
1604    asprintf(&tmp, "Wrong marker! (Should be %s, is actually %s)",
1605             marker_to_string(should_be), marker_to_string(it_is));
1606    log_to_screen(tmp);
1607    paranoid_free(tmp);
1608}
1609
1610/* @} - end of streamGroup */
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