source: branches/stable/mondo/src/common/libmondo-stream.c @ 1574

Last change on this file since 1574 was 1574, checked in by bruno, 12 years ago

More improvements on tape patch (/dev/st0 has to be the default)

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1/* $Id: libmondo-stream.c 1574 2007-07-26 10:34:42Z bruno $
2
3...tools for talking to tapes, Monitas streams, etc.
4*/
5
6/*
7 *
8 * @file
9 * Functions for writing data to/reading data from streams (tape, CD stream, etc.)
10 */
11
12#include <unistd.h>
13
14#include "my-stuff.h"
15#include "mr_mem.h"
16#include "mr_msg.h"
17#include "mr_list.h"
18#include "mr_gettext.h"
19
20#include "mondostructures.h"
21#include "libmondo-devices.h"
22#include "libmondo-stream.h"
23#include "libmondo-string-EXT.h"
24#include "libmondo-files-EXT.h"
25#include "newt-specific-EXT.h"
26#include "libmondo-fork-EXT.h"
27#include "libmondo-tools-EXT.h"
28#include "libmondo-fifo-EXT.h"
29
30#define EXTRA_TAPE_CHECKSUMS
31
32/*@unused@*/
33//static char cvsid[] = "$Id: libmondo-stream.c 1574 2007-07-26 10:34:42Z bruno $";
34extern bool g_sigpipe;
35extern int g_tape_buffer_size_MB;
36
37extern char *g_getfacl;
38extern char *g_getfattr;
39extern char *MONDO_LOGFILE;
40
41/**
42 * @addtogroup globalGroup
43 * @{
44 */
45/**
46 * The file pointer for the opened tape/CD stream.
47 * Opened and closed by openin_tape(), openin_cdstream(),
48 * openout_tape(), openout_cdstream(), closein_tape(), closein_cdstream(),
49 * closeout_tape(), and closeout_cdstream().
50 */
51FILE *g_tape_stream = NULL;
52
53
54/**
55 * The position (in kilobytes) where we are on the tape.
56 */
57long long g_tape_posK = 0;
58
59/**
60 * The current media number we're using. This value is 1-based.
61 */
62int g_current_media_number = -1;
63
64/**
65 * An entry in the tape catalog.
66 */
67struct s_tapecat_entry {
68    /**
69     * The type of archive it is (afioball, slice, or something else).
70     */
71    t_archtype type;
72
73    /**
74     * The filelist number or biggiefile (not slice!) number.
75     */
76    int number;
77
78    /**
79     * The slice number if it's a biggiefile.
80     */
81    long aux;
82
83    /**
84     * The tape position at the point this entry was added.
85     */
86    long long tape_posK;
87
88    /**
89     * The filename of the file cataloged here.
90     */
91    char *fname;
92};
93
94
95/*
96 * The tape catalog that keeps track of files written to tape.
97 * made of a list of @p s_tapecat_entry.
98 * */
99static struct mr_list *tapecatalog;
100
101/* function to free the fname field allocated in te */
102static void mr_free_te(void *data) {
103   
104    struct s_tapecat_entry *te = NULL;
105
106    te = (struct s_tapecat_entry *)data;
107    mr_free(te->fname);
108}
109
110/* @} - end of globalGroup */
111
112int write_backcatalog_to_tape(struct s_bkpinfo *bkpinfo);
113
114
115/**
116 * @addtogroup streamGroup
117 * @{
118 */
119/**
120 * Close the global output file descriptor which Mondo has used to read
121 * from the CD stream.
122 * @param bkpinfo The backup information structure. Passed directly to closein_tape().
123 * @return 0 for success, nonzero for failure.
124 * @note This should be called by restore processes only.
125 */
126int closein_cdstream(struct s_bkpinfo *bkpinfo)
127{
128    return (closein_tape(bkpinfo));
129}
130
131
132/**
133 * Close the global output file descriptor which Mondo has used to read
134 * from buffer or dd, which read from the tape.
135 * @param bkpinfo The backup information structure. Unused.
136 * @return 0 for success, nonzero for failure.
137 * @note This should be called by restore processes only.
138 * @note This function also works for cdstreams for now, but don't count on this behavior.
139 * @bug @p bkpinfo parameter is unused.
140 */
141int closein_tape(struct s_bkpinfo *bkpinfo)
142{
143    /*@ int's ******************************************************* */
144    int retval = 0;
145    int res = 0;
146    int ctrl_chr = '\0';
147
148    /*@ buffers ***************************************************** */
149    char fname[MAX_STR_LEN];
150
151    /*@ long long's ************************************************* */
152    long long size;
153    char *blk;
154    int i;
155
156    blk = (char *) mr_malloc(256 * 1024);
157
158    log_it("closein_tape() -- entering");
159    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
160    retval += res;
161    if (ctrl_chr != BLK_END_OF_BACKUP) {
162        wrong_marker(BLK_END_OF_BACKUP, ctrl_chr);
163    }
164    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
165    retval += res;
166    if (ctrl_chr != BLK_END_OF_TAPE) {
167        wrong_marker(BLK_END_OF_TAPE, ctrl_chr);
168    }
169    for (i = 0; i < 8 && !feof(g_tape_stream); i++) {
170        (void) fread(blk, 1, 256 * 1024, g_tape_stream);
171    }
172    sleep(1);
173    sync();
174    sleep(1);
175    paranoid_pclose(g_tape_stream);
176    log_it("closein_tape() -- leaving");
177    if (!bkpinfo->please_dont_eject) {
178        eject_device(bkpinfo->media_device);
179    }
180    mr_free(blk);
181    mr_list_free(tapecatalog);
182    return (retval);
183}
184
185
186
187/**
188 * Close the global output file descriptor which Mondo has been using to write
189 * to the tape device (via buffer or dd).
190 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
191 * @return 0 for success, nonzero for failure.
192 * @note This should be called by backup processes only.
193 */
194int closeout_tape(struct s_bkpinfo *bkpinfo)
195{
196    /*@ int's ******************************************************* */
197    int retval = 0;
198
199    /*@ long long's ************************************************* */
200    int i = 0;
201    char *blk = NULL;
202    struct mr_list_elt *elt = NULL;
203    struct s_tapecat_entry *te = NULL;
204
205    blk = (char *) mr_malloc(256 * 1024);
206
207    sleep(1);
208    sync();
209    sleep(1);
210    log_it("closeout_tape() -- entering");
211    retval +=
212        write_header_block_to_stream((off_t)0, "end-of-backup",
213                                     BLK_END_OF_BACKUP);
214    retval += write_header_block_to_stream((off_t)0, "end-of-tape", BLK_END_OF_TAPE);   /* just in case */
215    /* write 1MB of crap */
216    for (i = 0; i < 256 * 1024; i++) {
217        blk[i] = (int) (random() & 0xFF);
218    }
219    for (i = 0; i < 4 * 8; i++) {
220        (void) fwrite(blk, 1, 256 * 1024, g_tape_stream);
221        if (should_we_write_to_next_tape
222            (bkpinfo->media_size, (off_t)256 * 1024)) {
223            start_to_write_to_next_tape(bkpinfo);
224        }
225    }
226    sleep(2);
227    paranoid_pclose(g_tape_stream);
228    log_it("closeout_tape() -- leaving");
229    elt = tapecatalog->first;
230    while (elt != NULL) {
231        te = (struct s_tapecat_entry *)elt->data;
232        log_it("i=%d type=%s num=%d aux=%ld posK=%lld", i,
233               (te->type == fileset) ? "fileset" : "bigslice",
234               te->number, te->aux, te->tape_posK);
235        i++;
236        elt = elt->next;
237    }
238    mr_free(blk);
239    mr_list_free(tapecatalog);
240    return (retval);
241}
242
243
244
245bool mt_says_tape_exists(char *dev)
246{
247    char *command;
248    int res;
249
250    mr_asprintf(&command, "mt -f %s status", dev);
251    res = run_program_and_log_output(command, 1);
252    mr_free(command);
253    if (res) {
254        return (FALSE);
255    } else {
256        return (TRUE);
257    }
258}
259
260
261
262/**
263 * Determine the name and size of the tape device. Tries the SCSI tape for
264 * this platform, then the IDE tape, then "/dev/st0", then "/dev/osst0".
265 * @param dev Where to put the found tape device.
266 * @param siz Where to put the tape size (a string like "4GB")
267 * @return 0 if success, nonzero if failure (in which @p dev and @p siz are undefined).
268 */
269int find_tape_device_and_size(char *dev, char *siz)
270{
271    char tmp[MAX_STR_LEN];
272    char *command = NULL;
273    char cdr_exe[MAX_STR_LEN];
274    int res;
275
276    strcpy(dev, VANILLA_SCSI_TAPE);
277    log_to_screen("I am looking for your tape streamer. Please wait.");
278    log_it("I am looking for your tape streamer. Please wait.");
279    log_it("Taking %s as default",VANILLA_SCSI_TAPE);
280    dev[0] = siz[0] = '\0';
281    if (find_home_of_exe("cdrecord")) {
282        strcpy(cdr_exe, "cdrecord");
283    } else {
284        strcpy(cdr_exe, "dvdrecord");
285    }
286    mr_asprintf(&command, "%s -scanbus 2> /dev/null | grep -i tape | wc -l",
287            cdr_exe);
288    strcpy(tmp, call_program_and_get_last_line_of_output(command));
289    mr_free(command);
290    if (atoi(tmp) != 1) {
291        log_it("Either too few or too many tape streamers for me to detect...");
292        return 1;
293    }
294    mr_asprintf(&command,
295            "%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",
296            cdr_exe);
297    strcpy(tmp, call_program_and_get_last_line_of_output(command));
298    mr_free(command);
299    if (strlen(tmp) < 2) {
300        log_it("Could not check tape device with %s",cdr_exe);
301        return 1;
302    }
303    mr_asprintf(&command,
304            "%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",
305            cdr_exe);
306    strcpy(tmp, call_program_and_get_last_line_of_output(command));
307    mr_free(command);
308
309    strcpy(dev, VANILLA_SCSI_TAPE);
310    dev[strlen(dev) - 1] = '\0';
311    dev[strlen(dev) - 2] = '\0';
312    strcat(dev, tmp);           // e.g. '/dev/st0' becomes '/dev/stN'
313    res = 0;
314    if (!mt_says_tape_exists(dev)) {
315        strcpy(dev, ALT_TAPE);
316        if (!mt_says_tape_exists(dev)) {
317            log_it("Cannot openin %s", dev);
318            strcpy(dev, "/dev/osst0");
319            if (!mt_says_tape_exists(dev)) {
320                // Stay with VANILLA_SCSI_TAPE
321                strcpy(dev, VANILLA_SCSI_TAPE);
322                res++;
323            } else {
324                res = 0;
325            }
326        }
327    }
328
329    log_it("At this point, dev = %s and res = %d", dev, res);
330
331    strcpy(tmp, call_program_and_get_last_line_of_output("\
332cdrecord -scanbus 2> /dev/null | tr -s '\t' ' ' | \
333grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | \
334awk '{for(i=1; i<NF; i++) { if (index($i, \"GB\")>0) { print $i;};};};'"));
335
336    siz[0] = '\0';
337    log_it("res=%d; dev=%s", res, dev);
338
339    if (res) {
340        return (res);
341    }
342
343    if (strlen(tmp) < 2) {
344        siz[0] = '\0';
345        log_it("Warning - size of tape unknown");
346        return (0);
347    } else {
348        strcpy(siz, tmp);
349        return (0);
350    }
351}
352
353
354int read_EXAT_files_from_tape(struct s_bkpinfo *bkpinfo,
355                              long long *ptmp_size, char *tmp_fname,
356                              int *pctrl_chr, char *xattr_fname,
357                              char *acl_fname)
358{
359    int res = 0;
360    int retval = 0;
361    char *fname = (char *)&res;                 /* Should NOT be NULL */
362
363// xattr
364    if (g_getfattr) {
365        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
366        if (*pctrl_chr != BLK_START_EXAT_FILE) {
367            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
368        }
369        if (!strstr(fname, "xattr")) {
370            fatal_error("Wrong order, sunshine.");
371        }
372        read_file_from_stream_to_file(bkpinfo, xattr_fname, *ptmp_size);
373        res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
374        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
375            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
376        }
377        mr_msg(1, "Got xattr");
378    }
379    // acl
380    if (g_getfacl) {
381        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
382        if (!strstr(fname, "acl")) {
383            fatal_error("Wrong order, sunshine.");
384        }
385        if (*pctrl_chr != BLK_START_EXAT_FILE) {
386            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
387        }
388        read_file_from_stream_to_file(bkpinfo, acl_fname, *ptmp_size);
389        res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
390        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
391            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
392        }
393        res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
394        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
395            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
396        }
397        mr_msg(1, "Got acl");
398    }
399    // tarball itself
400    res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
401    mr_msg(1, "now looking for afioball");
402    return (retval);
403}
404
405
406int write_EXAT_files_to_tape(struct s_bkpinfo *bkpinfo, char *xattr_fname,
407                             char *acl_fname)
408{
409    int res = 0;
410    if (g_getfattr) {
411    // xattr
412        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
413                             BLK_START_EXTENDED_ATTRIBUTES);
414        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
415                             BLK_START_EXAT_FILE);
416        write_file_to_stream_from_file(bkpinfo, xattr_fname);
417        write_header_block_to_stream((off_t)-1, xattr_fname, BLK_STOP_EXAT_FILE);
418    }
419    if (g_getfacl) {
420    // acl
421        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
422                             BLK_START_EXAT_FILE);
423        write_file_to_stream_from_file(bkpinfo, acl_fname);
424        write_header_block_to_stream((off_t)-1, acl_fname, BLK_STOP_EXAT_FILE);
425        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
426                             BLK_STOP_EXTENDED_ATTRIBUTES);
427    }
428    return (res);
429}
430
431
432
433
434/**
435 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
436 * @param tapeno The tape number to insist on.
437 * @bug There is currently no way to actually verify that the user has actually
438 * inserted the right tape.
439 */
440void insist_on_this_tape_number(int tapeno)
441{
442    int i;
443    char *tmp = NULL;
444
445    log_it("Insisting on tape #%d", tapeno);
446    if (g_current_media_number != tapeno) {
447        //      log_it("g_current_media_number = %d", g_current_media_number);
448        mr_asprintf(&tmp,
449                 _("When the tape drive goes quiet, please insert volume %d in this series."),
450                 tapeno);
451        popup_and_OK(tmp);
452        mr_free(tmp);
453        open_evalcall_form(_("Waiting while the tape drive settles"));
454    } else {
455        open_evalcall_form(_("Waiting while the tape drive rewinds"));
456    }
457
458    for (i = 0; i <= 100; i += 2) {
459        usleep(100000);
460        update_evalcall_form(i);
461    }
462    close_evalcall_form();
463    log_it("I assume user has inserted it. They _say_ they have...");
464    g_current_media_number = tapeno;
465
466    //  log_it("g_current_media_number = %d", g_current_media_number);
467    log_it("OK, I've finished insisting. On with the revelry.");
468}
469
470
471/**
472 * Debugging aid - log the offset we're at on the tape (reading or writing).
473 */
474void log_tape_pos(void)
475{
476    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
477           (long) g_tape_posK >> 10);
478}
479
480
481/**
482 * Add a file to a collection of recently archived filesets/slices.
483 * The type is determined by the filename: if it contains ".afio." it is
484 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
485 * otherwise we generate a fatal_error().
486 * @param td The current @c bkpinfo->tempdir (file will be placed in <tt>td</tt>/tmpfs/backcatalog/).
487 * @param latest_fname The file to place in the collection.
488 * @return 0, always.
489 * @bug Return value is redundant.
490 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
491 */
492int maintain_collection_of_recent_archives(char *td, char *latest_fname)
493{
494    long long final_alleged_writeK, final_projected_certain_writeK,
495        final_actually_certain_writeK = 0, cposK, bufsize_K;
496    int last = 0;
497    int i = 0;
498    t_archtype type = other;
499    char *command = NULL;
500    char *tmpdir = NULL;
501    char *old_fname = NULL;
502    struct mr_list_elt *elt = NULL;
503    struct s_tapecat_entry *te = NULL;
504
505    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
506    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
507        type = fileset;
508    } else if (strstr(latest_fname, "slice")) {
509        type = biggieslice;
510    } else {
511        log_it("fname = %s", latest_fname);
512        fatal_error
513            ("Unknown type. Internal error in maintain_collection_of_recent_archives()");
514    }
515
516    mr_asprintf(&tmpdir, "%s/tmpfs/backcatalog", td);
517    mkdir(tmpdir, 0x700);
518    mr_asprintf(&command, "cp -f %s %s", latest_fname, tmpdir);
519    if (run_program_and_log_output(command, 6)) {
520        log_it("Warning - failed to copy %s to backcatalog at %s",
521               latest_fname, tmpdir);
522    }
523    mr_free(command);
524
525    last = mr_list_length(tapecatalog) - 1;
526    if (last <= 0) {
527        iamhere("Too early to start deleting from collection.");
528        return (0);
529    }
530    elt = tapecatalog->last;
531    te = (struct s_tapecat_entry *)elt->data;
532    final_alleged_writeK = te->tape_posK;
533    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
534    while (elt != NULL) {
535        te = (struct s_tapecat_entry *)elt->data;
536        cposK = te->tape_posK;
537        if (cposK < final_projected_certain_writeK) {
538            final_actually_certain_writeK = cposK;
539            break;
540        }
541        elt = elt->prev;
542    }
543    if (elt == NULL) {
544        iamhere
545            ("Not far enough into tape to start deleting old archives from collection.");
546        return (0);
547    }
548
549    elt = elt->prev;
550    i = 0;
551    while ((elt != NULL) && (i < 10)) {
552        te = (struct s_tapecat_entry *)elt->data;
553        mr_asprintf(&old_fname, "%s/%s", tmpdir, te->fname);
554        unlink(old_fname);
555        mr_free(old_fname);
556        elt = elt->prev;
557        i++;
558    }
559    mr_free(tmpdir);
560    return (0);
561}
562
563
564/**
565 * Open the CD stream for input.
566 * @param bkpinfo The backup information structure. Passed to openin_tape().
567 * @return 0 for success, nonzero for failure.
568 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
569 */
570int openin_cdstream(struct s_bkpinfo *bkpinfo)
571{
572    return (openin_tape(bkpinfo));
573}
574
575
576int set_tape_block_size_with_mt(char *tapedev,
577                                long internal_tape_block_size)
578{
579    char *tmp;
580    int res;
581
582    if (strncmp(tapedev, "/dev/", 5)) {
583        mr_msg(1,
584                "Not using 'mt setblk'. This isn't an actual /dev entry.");
585        return (0);
586    }
587    mr_asprintf(&tmp, "mt -f %s setblk %ld", tapedev,
588             internal_tape_block_size);
589    res = run_program_and_log_output(tmp, 3);
590    mr_free(tmp);
591    return (res);
592}
593
594
595/**
596 * Open the tape device for input.
597 * @param bkpinfo The backup information structure. Fields used:
598 * - @c bkpinfo->media_device
599 * - @c bkpinfo->tmpdir
600 * @return 0 for success, nonzero for failure.
601 * @note This will also work with a cdstream for now, but don't count on this behavior.
602 */
603int openin_tape(struct s_bkpinfo *bkpinfo)
604{
605    /*@ buffer ***************************************************** */
606    char fname[MAX_STR_LEN];
607    char *datablock = NULL;
608    char *tmp = NULL;
609    char old_cwd[MAX_STR_LEN];
610    char *outfname = NULL;
611    /*@ int ******************************************************* */
612    int i;
613    int j;
614    int res;
615    long length, templong;
616    size_t k;
617    int retval = 0;
618    int ctrl_chr;
619
620    /*@ long long ************************************************* */
621    long long size;
622
623    /*@ pointers ************************************************** */
624    FILE *fout;
625
626    /*@ end vars *************************************************** */
627
628    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
629    tapecatalog = mr_list_alloc();
630    g_tape_posK = 0;
631    if (g_tape_stream) {
632        log_it("FYI - I won't 'openin' the tape. It's already open.");
633        return (0);
634    }
635    insist_on_this_tape_number(1);
636    mr_asprintf(&outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
637    make_hole_for_file(outfname);
638
639    set_tape_block_size_with_mt(bkpinfo->media_device,
640                                bkpinfo->internal_tape_block_size);
641
642    log_it("Opening IN tape");
643    if (!
644        (g_tape_stream =
645         open_device_via_buffer(bkpinfo->media_device, 'r',
646                                bkpinfo->internal_tape_block_size))) {
647        log_to_screen(_("Cannot openin stream device"));
648        return (1);
649    }
650    log_to_screen(_("Reading stream"));
651    log_it("stream device = '%s'", bkpinfo->media_device);
652    /* skip data disks */
653    open_evalcall_form("Skipping data disks on stream");
654    log_to_screen(_("Skipping data disks on stream"));
655    if (!(fout = fopen(outfname, "w"))) {
656        log_OS_error(outfname);
657        log_to_screen(_("Cannot openout datadisk all.tar.gz file"));
658        return (-1);
659    }
660    datablock = (char *) mr_malloc(256 * 1024);
661    for (i = 0; i < 32; i++) {
662        for (j = 0; j < 4; j++) {
663            for (length = 0, k = 0; length < 256 * 1024; length += k) {
664                k = fread(datablock + length, 1, 256 * 1024 - length,
665                          g_tape_stream);
666            }
667            (void) fwrite(datablock, 1, (size_t) length, fout);
668            g_tape_posK += length / 1024;
669        }
670        if (i > 8)              // otherwise, 'buffer' distorts calculations
671        {
672            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
673            update_evalcall_form((int) (templong));
674        }
675    }
676    paranoid_fclose(fout);
677    mr_free(datablock);
678    /* find initial blocks */
679    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
680    retval += res;
681    if (ctrl_chr != BLK_START_OF_TAPE) {
682        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
683    }
684    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
685    retval += res;
686    if (ctrl_chr != BLK_START_OF_BACKUP) {
687        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
688    }
689    close_evalcall_form();
690    log_it("Saved all.tar.gz to '%s'", outfname);
691    (void) getcwd(old_cwd, MAX_STR_LEN);
692    chdir(bkpinfo->tmpdir);
693    mr_asprintf(&tmp, "tar -zxf %s tmp/mondo-restore.cfg 2> /dev/null",
694             outfname);
695    paranoid_system(tmp);
696    mr_free(tmp);
697    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
698    chdir(old_cwd);
699    unlink(outfname);
700    mr_free(outfname);
701    return (retval);
702}
703
704
705/**
706 * Start writing to a CD stream.
707 * @param cddev The CD device to openout via cdrecord.
708 * @param speed The speed to write at.
709 * @return 0 for success, nonzero for failure.
710 * @note This should be called only from backup processes.
711 */
712int openout_cdstream(char *cddev, int speed)
713{
714    /*@ buffers ***************************************************** */
715    char *command = NULL;
716
717    /*@ end vars *************************************************** */
718
719    /*  add 'dummy' if testing */
720    mr_asprintf(&command,
721             "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
722             cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
723    /*  initialise the catalog */
724    g_current_media_number = 1;
725    tapecatalog = mr_list_alloc();
726    /* log stuff */
727    log_it("Opening OUT cdstream with the command");
728    log_it(command);
729    /*  log_it("Let's see what happens, shall we?"); */
730    g_tape_stream = popen(command, "w");
731    mr_free(command);
732    if (g_tape_stream) {
733        return (0);
734    } else {
735        log_to_screen(_("Failed to openout to cdstream (fifo)"));
736        return (1);
737    }
738}
739
740
741/**
742 * Start writing to a tape device for the backup.
743 * @param tapedev The tape device to open for writing.
744 * @return 0 for success, nonzero for failure.
745 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
746 * EXISTING DATA on the tape!
747 */
748int openout_tape(char *tapedev, long internal_tape_block_size)
749{
750    g_current_media_number = 1;
751    if (g_tape_stream) {
752        log_it("FYI - I won't 'openout' the tape. It's already open.");
753        return (0);
754    }
755    tapecatalog = mr_list_alloc();
756    g_tape_posK = 0;
757
758    set_tape_block_size_with_mt(tapedev, internal_tape_block_size);
759    log_it("Opening OUT tape");
760    if (!
761        (g_tape_stream =
762         open_device_via_buffer(tapedev, 'w', internal_tape_block_size))) {
763        log_to_screen(_("Cannot openin stream device"));
764        return (1);
765    }
766    return (0);
767}
768
769
770/**
771 * Copy a file from the opened stream (CD or tape) to @p outfile.
772 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
773 * @param outfile The file to write to.
774 * @param size The size of the file in the input stream.
775 * @return 0 for success, nonzero for failure.
776 */
777int
778read_file_from_stream_to_file(struct s_bkpinfo *bkpinfo, char *outfile,
779                              long long size)
780{
781
782    /*@ int ******************************************************** */
783    int res;
784
785    /*@ end vars *************************************************** */
786
787    res = read_file_from_stream_FULL(bkpinfo, outfile, NULL, size);
788
789    return (res);
790}
791
792
793/**
794 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
795 * by @p fout.
796 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
797 * @param fout The stream to write the file to.
798 * @param size The size of the file in bytes.
799 * @return 0 for success, nonzero for failure.
800 */
801int
802read_file_from_stream_to_stream(struct s_bkpinfo *bkpinfo, FILE * fout,
803                                long long size)
804{
805
806    /*@ int ******************************************************** */
807    int res;
808
809    /*@ end vars *************************************************** */
810
811    res = read_file_from_stream_FULL(bkpinfo, NULL, fout, size);
812    return (res);
813}
814
815
816/**
817 * Copy a file from the currently opened stream (CD or tape) to either a
818 * @c FILE pointer indicating a currently-opened file, or a filename indicating
819 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
820 * and read_file_from_stream_to_stream() are wrappers for.
821 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
822 * @param outfname If non-NULL, write to this file.
823 * @param foutstream If non-NULL, write to this stream.
824 * @param orig_size The original length of the file in bytes.
825 * @return 0 for success, nonzero for failure.
826 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
827 */
828int
829read_file_from_stream_FULL(struct s_bkpinfo *bkpinfo, char *outfname,
830                           FILE * foutstream, long long orig_size)
831{
832    /*@ buffers ***************************************************** */
833    char *tmp = NULL;
834    char *datablock = NULL;
835    char *temp_fname;
836    char *temp_cksum;
837    char *actual_cksum = NULL;
838
839    /*@ int ********************************************************* */
840    int retval = 0;
841#ifdef EXTRA_TAPE_CHECKSUMS
842    int i, ch;
843#endif
844    int noof_blocks;
845    int ctrl_chr;
846    int res;
847    /*@ pointers **************************************************** */
848    FILE *fout;
849
850    /*@ long    ***************************************************** */
851    long bytes_to_write = 0;
852
853    /*@ long long *************************************************** */
854    long long temp_size, size;
855    long bytes_read, bytes_to_read;
856    long long total_read_from_tape_for_this_file = 0;
857    long long where_I_was_before_tape_change = 0;
858    /*@ unsigned int ************************************************ */
859    unsigned int crc16;
860    unsigned int crctt;
861
862    bool had_to_resync = FALSE;
863
864    /*@ init  ******************************************************* */
865    malloc_string(temp_fname);
866    malloc_string(temp_cksum);
867    datablock = mr_malloc(TAPE_BLOCK_SIZE);
868    crc16 = 0;
869    crctt = 0;
870    size = orig_size;
871
872    /*@ end vars *************************************************** */
873
874    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
875    if (orig_size != temp_size && orig_size != -1) {
876        mr_asprintf(&tmp,
877                 "output file's size should be %ld K but is apparently %ld K",
878                 (long) size >> 10, (long) temp_size >> 10);
879        log_to_screen(tmp);
880        mr_free(tmp);
881    }
882    if (ctrl_chr != BLK_START_FILE) {
883        wrong_marker(BLK_START_FILE, ctrl_chr);
884        return (1);
885    }
886    mr_asprintf(&tmp, "Reading file from tape; writing to '%s'; %ld KB",
887             outfname, (long) size >> 10);
888    log_to_screen(tmp);
889    mr_free(tmp);
890
891    if (foutstream) {
892        fout = foutstream;
893    } else {
894        fout = fopen(outfname, "w");
895    }
896    if (!fout) {
897        log_OS_error(outfname);
898        log_to_screen(_("Cannot openout file"));
899        return (1);
900    }
901    total_read_from_tape_for_this_file = 0;
902    for (noof_blocks = 0; size > 0;
903         noof_blocks++, size -=
904         bytes_to_write, total_read_from_tape_for_this_file +=
905         bytes_read) {
906        bytes_to_write =
907            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
908        bytes_to_read = TAPE_BLOCK_SIZE;
909        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
910        while (bytes_read < bytes_to_read) {    // next tape!
911//    crctt=crc16=0;
912            where_I_was_before_tape_change = size;
913            mr_msg(4, "where_I_was_... = %lld",
914                    where_I_was_before_tape_change);
915            start_to_read_from_next_tape(bkpinfo);
916            mr_msg(4, "Started reading from next tape.");
917            skip_incoming_files_until_we_find_this_one(temp_fname);
918            mr_msg(4, "Skipped irrelevant files OK.");
919            for (size = orig_size; size > where_I_was_before_tape_change;
920                 size -= bytes_to_write) {
921                bytes_read =
922                    fread(datablock, 1, bytes_to_read, g_tape_stream);
923            }
924            mr_msg(4, "'size' is now %lld (should be %lld)", size,
925                    where_I_was_before_tape_change);
926            log_to_screen("Successfully re-sync'd tape");
927            had_to_resync = TRUE;
928            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
929        }
930
931        (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
932
933#ifdef EXTRA_TAPE_CHECKSUMS
934        for (i = 0; i < (int) bytes_to_write; i++) {
935            ch = datablock[i];
936            crc16 = updcrcr(crc16, (unsigned) ch);
937            crctt = updcrc(crctt, (unsigned) ch);
938        }
939#endif
940    }
941    mr_msg(6, "Total read from tape for this file = %lld",
942            total_read_from_tape_for_this_file);
943    mr_msg(6, ".......................... Should be %lld", orig_size);
944    g_tape_posK += total_read_from_tape_for_this_file / 1024;
945    mr_asprintf(&actual_cksum, "%04x%04x", crc16, crctt);
946    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
947    } else {
948        paranoid_fclose(fout);
949    }
950    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
951    if (ctrl_chr != BLK_STOP_FILE) {
952        wrong_marker(BLK_STOP_FILE, ctrl_chr);
953//      fatal_error("Bad marker"); // return(1);
954    }
955    if (strcmp(temp_cksum, actual_cksum)) {
956        mr_asprintf(&tmp, _("actual cksum=%s; recorded cksum=%s"), actual_cksum,
957                 temp_cksum);
958        log_to_screen(tmp);
959        mr_free(tmp);
960
961        mr_asprintf(&tmp, _("%s (%ld K) is corrupt on tape"), temp_fname,
962                 (long) orig_size >> 10);
963        log_to_screen(tmp);
964        mr_free(tmp);
965        retval++;
966    }
967    mr_free(actual_cksum);
968    mr_free(datablock);
969    mr_free(temp_fname);
970    mr_free(temp_cksum);
971    return (retval);
972}
973
974
975/**
976 * Read a header block from the currently opened stream (CD or tape).
977 * This block indicates the length of the following file (if it's file-related)
978 * the filename (if it's file-related), and the block type.
979 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
980 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
981 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
982 * @return 0 for success, nonzero for failure.
983 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
984 */
985int
986read_header_block_from_stream(long long *plen, char *filename,
987                              int *pcontrol_char)
988{
989
990    /*@ buffers ***************************************************** */
991    char *tempblock;
992
993    /*@ int ********************************************************* */
994    int i, retval;
995
996    /*@ end vars *************************************************** */
997
998    tempblock = (char *) mr_malloc((size_t) TAPE_BLOCK_SIZE);
999
1000    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1001        tempblock[i] = 0;
1002    }
1003    while (!(*pcontrol_char = tempblock[7000])) {
1004        g_tape_posK +=
1005            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1006                  g_tape_stream) / 1024;
1007    }
1008    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1009    if (strcmp(tempblock + 6000 + *pcontrol_char, "Mondolicious, baby")) {
1010        log_it("Bad header block at %ld K", (long) g_tape_posK);
1011    }
1012    strcpy(filename, tempblock + 1000);
1013    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1014        log_to_screen("I can't verify an aborted backup.");
1015        retval = 1;
1016    } else {
1017        retval = 0;
1018    }
1019    for (i = 1000; i < 1020; i++) {
1020        if (tempblock[i] < 32 || tempblock[i] > 126) {
1021            tempblock[i] = ' ';
1022        }
1023    }
1024    tempblock[i] = '\0';
1025    mr_msg(6, "%s (fname=%s, size=%ld K)",
1026            marker_to_string(*pcontrol_char), tempblock + 1000,
1027            (long) (*plen) >> 10);
1028    mr_free(tempblock);
1029    return (retval);
1030}
1031
1032
1033/**
1034 * Add specified file/slice to the internal catalog of all archives written.
1035 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1036 * write the last [buffer size] MB from the catalog to the new tape, so we know
1037 * we have @e all archives on some CD/tape/whatever.
1038 * @param type The type of file we're cataloging (afioball, slice, something else)
1039 * @param number The fileset number or biggiefile number.
1040 * @param aux The slice number if it's a biggiefile, or any other additional info.
1041 * @param fn The original full pathname of the file we're recording.
1042 * @return The index of the record we just added.
1043 */
1044int register_in_tape_catalog(t_archtype type, int number, long aux,
1045                             char *fn)
1046{
1047    char *fname = NULL;
1048    char *p = NULL;
1049    struct s_tapecat_entry *te = NULL;
1050    struct mr_list_elt *elt = NULL;
1051
1052    p = strrchr(fn, '/');
1053    if (p) {
1054        p++;
1055    } else {
1056        p = fn;
1057    }
1058    mr_asprintf(&fname, p);
1059
1060    te = (struct s_tapecat_entry *)mr_malloc(sizeof(struct s_tapecat_entry));
1061    te->type = type;
1062    te->number = number;
1063    te->aux = aux;
1064    te->tape_posK = g_tape_posK;
1065    /* BERLIOS: Check if this is written womewhere, as it's only a pointer */
1066    /* BERLIOS: Verify to purge fname correctly */
1067    te->fname = fname;
1068
1069    /* place the data in a list elt */
1070    elt = mr_list_alloc_elt((void *)te, mr_free_te);
1071    mr_list_add_elt_last(tapecatalog, elt);
1072
1073    // returns the index of the record we've just added
1074    return (mr_list_length(tapecatalog));
1075}
1076
1077
1078/**
1079 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1080 * (got SIGPIPE) or look like we will.
1081 * @param mediasize The size of the tape in megabytes.
1082 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1083 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1084 * autodetecting the size. Huh?
1085 */
1086
1087/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1088bool
1089should_we_write_to_next_tape(long mediasize,
1090                             off_t length_of_incoming_file)
1091{
1092    /*@ bool's ***************************************************** */
1093    bool we_need_a_new_tape = FALSE;
1094
1095    /*@ end vars *************************************************** */
1096
1097    if (mediasize == 0) {
1098        return (FALSE);
1099    }
1100    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1101        log_it("mediasize = %ld", mediasize);
1102        we_need_a_new_tape = TRUE;
1103        log_to_screen(_("Should have started a new tape/CD already"));
1104    }
1105    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1106        mediasize - (SLICE_SIZE * 4 / 1024)) {
1107        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1108               mediasize);
1109        we_need_a_new_tape = TRUE;
1110    }
1111    return (we_need_a_new_tape);
1112}
1113
1114
1115/**
1116 * Seek through the stream until we find a header block where the NAME field matches
1117 * @p the_file_I_was_reading. This is useful if you've just started reading from
1118 * a new tape and want to find the file you were reading when the tape ended.
1119 * @param the_file_I_was_reading File name to look for.
1120 * @return 0 for success, nonzero for failure.
1121 */
1122int skip_incoming_files_until_we_find_this_one(char
1123                                               *the_file_I_was_reading)
1124{
1125    char *pA;
1126    char *pB;
1127    int res;
1128    int ctrl_chr;
1129    char *temp_fname;
1130    char *datablock;
1131    long long temp_size, size;
1132    long bytes_to_write;
1133
1134    datablock = mr_malloc(TAPE_BLOCK_SIZE);
1135    malloc_string(temp_fname);
1136    pB = strrchr(the_file_I_was_reading, '/');
1137    if (pB) {
1138        pB++;
1139    } else {
1140        pB = the_file_I_was_reading;
1141    }
1142    mr_msg(1, "skip_incoming_..(%s)", pB);
1143    mr_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1144    ctrl_chr = -1;
1145    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1146        res =
1147            read_header_block_from_stream(&temp_size, temp_fname,
1148                                          &ctrl_chr);
1149        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1150            break;
1151        }
1152        mr_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1153        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1154        mr_msg(3, "Still trying to re-sync w/ tape");
1155    }
1156    while (ctrl_chr != BLK_START_FILE) {
1157        res =
1158            read_header_block_from_stream(&temp_size, temp_fname,
1159                                          &ctrl_chr);
1160        if (ctrl_chr == BLK_START_FILE) {
1161            break;
1162        }
1163        mr_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1164        wrong_marker(BLK_START_FILE, ctrl_chr);
1165        mr_msg(3, "Still trying to re-sync w/ tape");
1166    }
1167    pA = strrchr(temp_fname, '/');
1168    if (pA) {
1169        pA++;
1170    } else {
1171        pA = temp_fname;
1172    }
1173    pB = strrchr(the_file_I_was_reading, '/');
1174    if (pB) {
1175        pB++;
1176    } else {
1177        pB = the_file_I_was_reading;
1178    }
1179    while (strcmp(pA, pB)) {
1180        mr_msg(6, "Skipping %s (it's not %s)", temp_fname,
1181                the_file_I_was_reading);
1182        for (size = temp_size; size > 0; size -= bytes_to_write) {
1183            bytes_to_write =
1184                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1185            // FIXME - needs error-checking and -catching
1186            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1187        }
1188        res =
1189            read_header_block_from_stream(&temp_size, temp_fname,
1190                                          &ctrl_chr);
1191        if (ctrl_chr != BLK_STOP_FILE) {
1192            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1193        }
1194        res =
1195            read_header_block_from_stream(&temp_size, temp_fname,
1196                                          &ctrl_chr);
1197        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1198            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1199        }
1200        res =
1201            read_header_block_from_stream(&temp_size, temp_fname,
1202                                          &ctrl_chr);
1203        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1204            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1205        }
1206        res =
1207            read_header_block_from_stream(&temp_size, temp_fname,
1208                                          &ctrl_chr);
1209        if (ctrl_chr != BLK_START_FILE) {
1210            wrong_marker(BLK_START_FILE, ctrl_chr);
1211        }
1212        pA = strrchr(temp_fname, '/');
1213        if (pA) {
1214            pA++;
1215        } else {
1216            pA = temp_fname;
1217        }
1218        pB = strrchr(the_file_I_was_reading, '/');
1219        if (pB) {
1220            pB++;
1221        } else {
1222            pB = the_file_I_was_reading;
1223        }
1224    }
1225    mr_msg(2, "Reading %s (it matches %s)", temp_fname,
1226            the_file_I_was_reading);
1227    mr_free(temp_fname);
1228    mr_free(datablock);
1229    return (0);
1230}
1231
1232
1233/**
1234 * Start to read from the next tape. Assumes the user has already inserted it.
1235 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1236 * @return 0 for success, nonzero for failure.
1237 */
1238int start_to_read_from_next_tape(struct s_bkpinfo *bkpinfo)
1239{
1240    /*@ int ********************************************************* */
1241    int res = 0;
1242    char *sz_msg;
1243    int ctrlchr;
1244    long long temp_size;
1245    malloc_string(sz_msg);
1246    /*@ end vars *************************************************** */
1247
1248    paranoid_pclose(g_tape_stream);
1249    sync();
1250    sync();
1251    sync();
1252    log_it("Next tape requested.");
1253    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1254    log_it("Opening IN the next tape");
1255    if (!
1256        (g_tape_stream =
1257         open_device_via_buffer(bkpinfo->media_device, 'r',
1258                                bkpinfo->internal_tape_block_size))) {
1259        log_to_screen(_("Cannot openin stream device"));
1260        return (1);
1261    }
1262    g_tape_posK = 0;
1263    g_sigpipe = FALSE;
1264    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1265    if (ctrlchr != BLK_START_OF_TAPE) {
1266        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1267    }
1268    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1269    if (ctrlchr != BLK_START_OF_BACKUP) {
1270        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1271    } else {
1272        mr_msg(3, "Next tape opened OK. Whoopee!");
1273    }
1274    mr_free(sz_msg);
1275    return (res);
1276}
1277
1278
1279/**
1280 * Start to write to the next tape. Assume the user has already inserted it.
1281 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1282 * @return 0 for success, nonzero for failure.
1283 */
1284int start_to_write_to_next_tape(struct s_bkpinfo *bkpinfo)
1285{
1286    int res = 0;
1287    char *command = NULL;
1288
1289    paranoid_pclose(g_tape_stream);
1290    sync();
1291    sync();
1292    sync();
1293    log_it("New tape requested.");
1294    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1295    if (bkpinfo->backup_media_type == cdstream) {
1296        mr_asprintf(&command,
1297                 "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1298                 bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE,
1299                 MONDO_LOGFILE);
1300        log_it("Opening OUT to next CD with the command");
1301        log_it(command);
1302        log_it("Let's see what happens, shall we?");
1303        g_tape_stream = popen(command, "w");
1304        mr_free(command);
1305        if (!g_tape_stream) {
1306            log_to_screen(_("Failed to openout to cdstream (fifo)"));
1307            return (1);
1308        }
1309    } else {
1310        log_it("Opening OUT to next tape");
1311        if (!
1312            (g_tape_stream =
1313             open_device_via_buffer(bkpinfo->media_device, 'w',
1314                                    bkpinfo->internal_tape_block_size))) {
1315            log_to_screen(_("Cannot openin stream device"));
1316            return (1);
1317        }
1318    }
1319    g_tape_posK = 0;
1320    g_sigpipe = FALSE;
1321    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1322    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1323    return (res);
1324}
1325
1326
1327/**
1328 * Write a bufferfull of the most recent archives to the tape. The
1329 * rationale behind this is a bit complex. If the previous tape ended
1330 * suddenly (EOF or otherwise) some archives were probably left in the
1331 * buffer. That means that Mondo thinks they have been written, but
1332 * the external binary @c buffer has not actually written them. So to
1333 * be safe, we start the new tape by writing the last bufferfull from
1334 * the old one. This insures that all archives will be on at least
1335 * one tape. Sounds inelegant, but it works.
1336 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1337 * @return 0 for success, nonzero for failure.
1338 */
1339int write_backcatalog_to_tape(struct s_bkpinfo *bkpinfo)
1340{
1341    int res = 0;
1342    char *fname = NULL;
1343    struct mr_list_elt *elt = NULL;
1344    struct s_tapecat_entry *te = NULL;
1345
1346    mr_msg(2, "I am now writing back catalog to tape");
1347    elt = tapecatalog->first;
1348    while (elt != NULL) {
1349        te = (struct s_tapecat_entry *) elt->data;
1350        mr_asprintf(&fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir, te->fname);
1351        if (!does_file_exist(fname)) {
1352            mr_msg(6, "Can't write %s - it doesn't exist.", fname);
1353        } else {
1354            write_header_block_to_stream(length_of_file(fname),
1355                                         "start-backcatalog-afio-or-slice",
1356                                         BLK_START_AN_AFIO_OR_SLICE);
1357            mr_msg(2, "Writing %s", fname);
1358            if (write_file_to_stream_from_file(bkpinfo, fname)) {
1359                res++;
1360                mr_msg(2, "%s failed", fname);
1361            }
1362            if (elt != tapecatalog->last) {
1363                write_header_block_to_stream((off_t)0,
1364                                             "stop-backcatalog-afio-or-slice",
1365                                             BLK_STOP_AN_AFIO_OR_SLICE);
1366            }
1367        }
1368        mr_free(fname);
1369        elt = elt->next;
1370    }
1371    mr_msg(2, "Finished writing back catalog to tape");
1372    return (res);
1373}
1374
1375
1376/**
1377 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1378 * @param fname The path to all.tar.gz.
1379 * @return 0 for success, nonzero for failure.
1380 */
1381int write_data_disks_to_stream(char *fname)
1382{
1383    /*@ pointers *************************************************** */
1384    FILE *fin = NULL;
1385    char *tmp = NULL;
1386
1387    /*@ long ******************************************************* */
1388    long m = -1;
1389    long templong;
1390
1391    /*@ int ******************************************************** */
1392    int i, j;
1393
1394    /*@ buffers **************************************************** */
1395    char tempblock[256 * 1024];
1396
1397    /*@ end vars *************************************************** */
1398
1399    open_evalcall_form(_("Writing data disks to tape"));
1400    log_to_screen(_("Writing data disks to tape"));
1401    log_it("Data disks = %s", fname);
1402    if (!does_file_exist(fname)) {
1403        mr_asprintf(&tmp, _("Cannot find %s"), fname);
1404        log_to_screen(tmp);
1405        mr_free(tmp);
1406        return (1);
1407    }
1408    if (!(fin = fopen(fname, "r"))) {
1409        log_OS_error(fname);
1410        fatal_error("Cannot openin the data disk");
1411    }
1412    for (i = 0; i < 32; i++) {  /* 32MB */
1413        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1414            if (!feof(fin)) {
1415                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1416            } else {
1417                m = 0;
1418            }
1419            for (; m < 256 * 1024; m++) {
1420                tempblock[m] = '\0';
1421            }
1422            g_tape_posK +=
1423                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1424        }
1425        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1426        {
1427            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1428            update_evalcall_form((int) (templong));
1429        }
1430    }
1431    paranoid_fclose(fin);
1432    close_evalcall_form();
1433    return (0);
1434}
1435
1436
1437/**
1438 * Copy @p infile to the opened stream (CD or tape).
1439 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1440 * @param infile The file to write to the stream.
1441 * @return 0 for success, nonzero for failure.
1442 */
1443int write_file_to_stream_from_file(struct s_bkpinfo *bkpinfo, char *infile)
1444{
1445    /*@ buffers **************************************************** */
1446    char *tmp = NULL;
1447    char datablock[TAPE_BLOCK_SIZE];
1448    char *checksum = NULL;
1449    char *infile_basename = NULL;
1450
1451    /*@ int ******************************************************** */
1452    int retval = 0;
1453    int noof_blocks;
1454
1455    /*  unsigned int ch; */
1456    unsigned int crc16;
1457    unsigned int crctt;
1458
1459    /*@ pointers *************************************************** */
1460    FILE *fin;
1461    char *p;
1462
1463    /*@ long ******************************************************* */
1464    long bytes_to_read = 0;
1465    long i;
1466
1467    off_t filesize;
1468
1469#ifdef EXTRA_TAPE_CHECKSUMS
1470    int ch;
1471#endif
1472
1473    /*@ initialize ************************************************ */
1474    crc16 = 0;
1475    crctt = 0;
1476
1477    /*@ end vars *************************************************** */
1478
1479    infile_basename = strrchr(infile, '/');
1480    if (infile_basename) {
1481        infile_basename++;
1482    } else {
1483        infile_basename = infile;
1484    }
1485    filesize = length_of_file(infile);
1486    if (should_we_write_to_next_tape
1487        (bkpinfo->media_size, filesize)) {
1488        start_to_write_to_next_tape(bkpinfo);
1489        write_backcatalog_to_tape(bkpinfo);
1490    }
1491    p = strrchr(infile, '/');
1492    if (!p) {
1493        p = infile;
1494    } else {
1495        p++;
1496    }
1497    mr_asprintf(&tmp, "Writing file '%s' to tape (%ld KB)", p,
1498             (long) filesize >> 10);
1499    log_it(tmp);
1500    mr_free(tmp);
1501
1502    write_header_block_to_stream(filesize, infile_basename,
1503                                 BLK_START_FILE);
1504//go_here_to_restart_saving_of_file:
1505    if (!(fin = fopen(infile, "r"))) {
1506        log_OS_error(infile);
1507        return (1);
1508    }
1509    for (noof_blocks = 0; filesize > 0;
1510         noof_blocks++, filesize -= bytes_to_read) {
1511        if (filesize < TAPE_BLOCK_SIZE) {
1512            bytes_to_read = (long) filesize;
1513            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1514                datablock[i] = '\0';
1515            }
1516        } else {
1517            bytes_to_read = TAPE_BLOCK_SIZE;
1518        }
1519        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1520        g_tape_posK += fwrite(datablock, 1, /*bytes_to_read */
1521                              (size_t) TAPE_BLOCK_SIZE,
1522                              g_tape_stream) / 1024;
1523        if (g_sigpipe) {
1524            iamhere("Sigpipe occurred recently. I'll start a new tape.");
1525            fclose(fin);
1526            g_sigpipe = FALSE;
1527            start_to_write_to_next_tape(bkpinfo);
1528            write_backcatalog_to_tape(bkpinfo); // kinda-sorta recursive :)
1529            return (0);
1530        }
1531#ifdef EXTRA_TAPE_CHECKSUMS
1532        for (i = 0; i < bytes_to_read; i++) {
1533            ch = datablock[i];
1534            crc16 = updcrcr(crc16, (unsigned) ch);
1535            crctt = updcrc(crctt, (unsigned) ch);
1536        }
1537#endif
1538    }
1539    paranoid_fclose(fin);
1540    mr_asprintf(&checksum, "%04x%04x", crc16, crctt);
1541    /* BERLIOS: what does it do ??? */
1542    write_header_block_to_stream((off_t)g_current_media_number, checksum,
1543                                 BLK_STOP_FILE);
1544    mr_free(checksum);
1545//  log_it("File '%s' written to tape.", infile);
1546    return (retval);
1547}
1548
1549
1550/**
1551 * Write a header block to the opened stream (CD or tape).
1552 * @param length_of_incoming_file The length to store in the header block.
1553 * Usually matters only if this is a file-related header, in which case it should
1554 * be the length of the file that will follow.
1555 * @param filename The filename to store in the header block. Usually matters
1556 * only if this is a file-related header, in which case this should be the name
1557 * if the file that will follow.
1558 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1559 * @return 0 for success, nonzero for failure.
1560 */
1561int
1562write_header_block_to_stream(off_t length_of_incoming_file,
1563                             char *filename, int control_char)
1564{
1565    /*@ buffers **************************************************** */
1566    char tempblock[TAPE_BLOCK_SIZE];
1567    char *p;
1568
1569    /*@ int ******************************************************** */
1570    int i;
1571
1572    off_t olen;
1573
1574    /*@ end vars *************************************************** */
1575
1576
1577    olen = length_of_incoming_file;
1578    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1579    if (!p) {
1580        p = filename;
1581    } else {
1582        p++;
1583    }
1584    if (!g_tape_stream) {
1585        log_to_screen
1586            (_("You're not backing up to tape. Why write a tape header?"));
1587        return (1);
1588    }
1589    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1590        tempblock[i] = 0;
1591    }
1592    sprintf(tempblock + 6000 + control_char, "Mondolicious, baby");
1593    tempblock[7000] = control_char;
1594    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1595    strcpy(tempblock + 1000, filename);
1596    g_tape_posK +=
1597        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1598               g_tape_stream) / 1024;
1599    mr_msg(6, "%s (fname=%s, size=%ld K)",
1600            marker_to_string(control_char), p,
1601            (long) length_of_incoming_file >> 10);
1602    return (0);
1603}
1604
1605
1606/**
1607 * Log (to screen) an erroneous marker, along with what it should have been.
1608 * @param should_be What we were expecting.
1609 * @param it_is What we got.
1610 */
1611void wrong_marker(int should_be, int it_is)
1612{
1613    /*@ buffer ***************************************************** */
1614    char *tmp = NULL;
1615
1616
1617    /*@ end vars *************************************************** */
1618    mr_asprintf(&tmp, _("Wrong marker! (Should be %s, is actually %s)"),
1619             marker_to_string(should_be), marker_to_string(it_is));
1620    log_to_screen(tmp);
1621    mr_free(tmp);
1622}
1623
1624/* @} - end of streamGroup */
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