source: branches/stable/mondo/src/common/libmondo-stream.c @ 1904

Last change on this file since 1904 was 1904, checked in by bruno, 11 years ago

merge -r 1889:1902 svn+ssh://bruno@svn.mondorescue.org/mondo/svn/mondorescue/branches/2.2.6

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1/* $Id: libmondo-stream.c 1904 2008-04-09 23:20:42Z 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#include "mr_conf.h"
20
21#include "mondostructures.h"
22#include "libmondo-devices.h"
23#include "libmondo-stream.h"
24#include "libmondo-string-EXT.h"
25#include "libmondo-files-EXT.h"
26#include "newt-specific-EXT.h"
27#include "libmondo-fork-EXT.h"
28#include "libmondo-tools-EXT.h"
29#include "libmondo-fifo-EXT.h"
30
31#define EXTRA_TAPE_CHECKSUMS
32
33/*@unused@*/
34//static char cvsid[] = "$Id: libmondo-stream.c 1904 2008-04-09 23:20:42Z bruno $";
35extern bool g_sigpipe;
36extern int g_tape_buffer_size_MB;
37
38extern char *g_getfacl;
39extern char *g_getfattr;
40extern char *MONDO_LOGFILE;
41
42extern struct mr_ar_conf *mr_conf;
43
44/* Reference to global bkpinfo */
45extern struct s_bkpinfo *bkpinfo;
46
47/**
48 * @addtogroup globalGroup
49 * @{
50 */
51/**
52 * The file pointer for the opened tape/CD stream.
53 * Opened and closed by openin_tape(), openin_cdstream(),
54 * openout_tape(), openout_cdstream(), closein_tape(), closein_cdstream(),
55 * closeout_tape(), and closeout_cdstream().
56 */
57FILE *g_tape_stream = NULL;
58
59
60/**
61 * The position (in kilobytes) where we are on the tape.
62 */
63long long g_tape_posK = 0;
64
65/**
66 * The current media number we're using. This value is 1-based.
67 */
68int g_current_media_number = -1;
69
70/**
71 * An entry in the tape catalog.
72 */
73struct s_tapecat_entry {
74    /**
75     * The type of archive it is (afioball, slice, or something else).
76     */
77    t_archtype type;
78
79    /**
80     * The filelist number or biggiefile (not slice!) number.
81     */
82    int number;
83
84    /**
85     * The slice number if it's a biggiefile.
86     */
87    long aux;
88
89    /**
90     * The tape position at the point this entry was added.
91     */
92    long long tape_posK;
93
94    /**
95     * The filename of the file cataloged here.
96     */
97    char *fname;
98};
99
100
101/*
102 * The tape catalog that keeps track of files written to tape.
103 * made of a list of @p s_tapecat_entry.
104 * */
105static struct mr_list *tapecatalog;
106
107/* function to free the fname field allocated in te */
108static void mr_free_te(void *data) {
109   
110    struct s_tapecat_entry *te = NULL;
111
112    te = (struct s_tapecat_entry *)data;
113    mr_free(te->fname);
114}
115
116/* @} - end of globalGroup */
117
118int write_backcatalog_to_tape(struct s_bkpinfo *bkpinfo);
119
120
121/**
122 * @addtogroup streamGroup
123 * @{
124 */
125/**
126 * Close the global output file descriptor which Mondo has used to read
127 * from the CD stream.
128 * @param bkpinfo The backup information structure. Passed directly to closein_tape().
129 * @return 0 for success, nonzero for failure.
130 * @note This should be called by restore processes only.
131 */
132int closein_cdstream()
133{
134    return (closein_tape());
135}
136
137
138/**
139 * Close the global output file descriptor which Mondo has used to read
140 * from buffer or dd, which read from the tape.
141 * @param bkpinfo The backup information structure. Unused.
142 * @return 0 for success, nonzero for failure.
143 * @note This should be called by restore processes only.
144 * @note This function also works for cdstreams for now, but don't count on this behavior.
145 * @bug @p bkpinfo parameter is unused.
146 */
147int closein_tape()
148{
149    /*@ int's ******************************************************* */
150    int retval = 0;
151    int res = 0;
152    int ctrl_chr = '\0';
153
154    /*@ buffers ***************************************************** */
155    char fname[MAX_STR_LEN];
156
157    /*@ long long's ************************************************* */
158    long long size;
159    char *blk;
160    int i;
161
162    blk = (char *) mr_malloc(256 * 1024);
163
164    log_it("closein_tape() -- entering");
165    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
166    retval += res;
167    if (ctrl_chr != BLK_END_OF_BACKUP) {
168        wrong_marker(BLK_END_OF_BACKUP, ctrl_chr);
169    }
170    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
171    retval += res;
172    if (ctrl_chr != BLK_END_OF_TAPE) {
173        wrong_marker(BLK_END_OF_TAPE, ctrl_chr);
174    }
175    for (i = 0; i < 8 && !feof(g_tape_stream); i++) {
176        (void) fread(blk, 1, 256 * 1024, g_tape_stream);
177    }
178    sleep(1);
179    sync();
180    sleep(1);
181    paranoid_pclose(g_tape_stream);
182    log_it("closein_tape() -- leaving");
183    if (!bkpinfo->please_dont_eject) {
184        eject_device(bkpinfo->media_device);
185    }
186    mr_free(blk);
187    mr_list_free(tapecatalog);
188    return (retval);
189}
190
191
192
193/**
194 * Close the global output file descriptor which Mondo has been using to write
195 * to the tape device (via buffer or dd).
196 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
197 * @return 0 for success, nonzero for failure.
198 * @note This should be called by backup processes only.
199 */
200int closeout_tape()
201{
202    /*@ int's ******************************************************* */
203    int retval = 0;
204
205    /*@ long long's ************************************************* */
206    int i = 0;
207    char *blk = NULL;
208    struct mr_list_elt *elt = NULL;
209    struct s_tapecat_entry *te = NULL;
210
211    blk = (char *) mr_malloc(256 * 1024);
212
213    sleep(1);
214    sync();
215    sleep(1);
216    log_it("closeout_tape() -- entering");
217    retval +=
218        write_header_block_to_stream((off_t)0, "end-of-backup",
219                                     BLK_END_OF_BACKUP);
220    retval += write_header_block_to_stream((off_t)0, "end-of-tape", BLK_END_OF_TAPE);   /* just in case */
221    /* write 1MB of crap */
222    for (i = 0; i < 256 * 1024; i++) {
223        blk[i] = (int) (random() & 0xFF);
224    }
225    for (i = 0; i < 4 * 8; i++) {
226        (void) fwrite(blk, 1, 256 * 1024, g_tape_stream);
227        if (should_we_write_to_next_tape
228            (bkpinfo->media_size, (off_t)256 * 1024)) {
229            start_to_write_to_next_tape();
230        }
231    }
232    sleep(2);
233    paranoid_pclose(g_tape_stream);
234    log_it("closeout_tape() -- leaving");
235    elt = tapecatalog->first;
236    while (elt != NULL) {
237        te = (struct s_tapecat_entry *)elt->data;
238        log_it("i=%d type=%s num=%d aux=%ld posK=%lld", i,
239               (te->type == fileset) ? "fileset" : "bigslice",
240               te->number, te->aux, te->tape_posK);
241        i++;
242        elt = elt->next;
243    }
244    mr_free(blk);
245    mr_list_free(tapecatalog);
246    return (retval);
247}
248
249
250
251bool mt_says_tape_exists(char *dev)
252{
253    char *command;
254    int res;
255
256    mr_asprintf(&command, "mt -f %s status", dev);
257    res = run_program_and_log_output(command, 1);
258    mr_free(command);
259    if (res) {
260        return (FALSE);
261    } else {
262        return (TRUE);
263    }
264}
265
266
267
268/**
269 * Determine the name and size of the tape device. Tries the SCSI tape for
270 * this platform, then the IDE tape, then "/dev/st0", then "/dev/osst0".
271 * @param dev Where to put the found tape device.
272 * @param siz Where to put the tape size (a string like "4GB")
273 * @return 0 if success, nonzero if failure (in which @p dev and @p siz are undefined).
274 */
275int find_tape_device_and_size(char *dev, char *siz)
276{
277    char tmp[MAX_STR_LEN];
278    char *command = NULL;
279    char cdr_exe[MAX_STR_LEN];
280    int res;
281
282    strcpy(dev, VANILLA_SCSI_TAPE);
283    log_to_screen("I am looking for your tape streamer. Please wait.");
284    log_it("I am looking for your tape streamer. Please wait.");
285    log_it("Taking %s as default",VANILLA_SCSI_TAPE);
286    dev[0] = siz[0] = '\0';
287    if (find_home_of_exe("cdrecord")) {
288        strcpy(cdr_exe, "cdrecord");
289    } else {
290        strcpy(cdr_exe, "dvdrecord");
291    }
292    mr_asprintf(&command, "%s -scanbus 2> /dev/null | grep -i tape | wc -l",
293            cdr_exe);
294    strcpy(tmp, call_program_and_get_last_line_of_output(command));
295    mr_free(command);
296    if (atoi(tmp) != 1) {
297        log_it("Either too few or too many tape streamers for me to detect...");
298        return 1;
299    }
300    mr_asprintf(&command,
301            "%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",
302            cdr_exe);
303    strcpy(tmp, call_program_and_get_last_line_of_output(command));
304    mr_free(command);
305    if (strlen(tmp) < 2) {
306        log_it("Could not check tape device with %s",cdr_exe);
307        return 1;
308    }
309    mr_asprintf(&command,
310            "%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",
311            cdr_exe);
312    strcpy(tmp, call_program_and_get_last_line_of_output(command));
313    mr_free(command);
314
315    strcpy(dev, VANILLA_SCSI_TAPE);
316    dev[strlen(dev) - 1] = '\0';
317    dev[strlen(dev) - 2] = '\0';
318    strcat(dev, tmp);           // e.g. '/dev/st0' becomes '/dev/stN'
319    res = 0;
320    if (!mt_says_tape_exists(dev)) {
321        strcpy(dev, ALT_TAPE);
322        if (!mt_says_tape_exists(dev)) {
323            log_it("Cannot openin %s", dev);
324            strcpy(dev, "/dev/osst0");
325            if (!mt_says_tape_exists(dev)) {
326                // Stay with VANILLA_SCSI_TAPE
327                strcpy(dev, VANILLA_SCSI_TAPE);
328                res++;
329            } else {
330                res = 0;
331            }
332        }
333    }
334
335    log_it("At this point, dev = %s and res = %d", dev, res);
336
337    mr_asprintf(&command, "%s -scanbus 2> /dev/null | tr -s '\t' ' ' | grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | awk '{for(i=1; i<NF; i++) { if (index($i, \"GB\")>0) { print $i;};};};'", cdr_exe);
338    strcpy(tmp, call_program_and_get_last_line_of_output(command));
339    mr_free(command);
340
341    siz[0] = '\0';
342    log_it("res=%d; dev=%s", res, dev);
343
344    if (res) {
345        return (res);
346    }
347
348    if (strlen(tmp) < 2) {
349        siz[0] = '\0';
350        log_it("Warning - size of tape unknown");
351        return (0);
352    } else {
353        strcpy(siz, tmp);
354        return (0);
355    }
356}
357
358
359int read_EXAT_files_from_tape(long long *ptmp_size, char *tmp_fname,
360                              int *pctrl_chr, char *xattr_fname,
361                              char *acl_fname)
362{
363    int res = 0;
364    int retval = 0;
365    char *fname = (char *)&res;                 /* Should NOT be NULL */
366
367// xattr
368    if (g_getfattr) {
369        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
370        if (*pctrl_chr != BLK_START_EXAT_FILE) {
371            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
372        }
373        if (!strstr(fname, "xattr")) {
374            fatal_error("Wrong order, sunshine.");
375        }
376        read_file_from_stream_to_file(xattr_fname, *ptmp_size);
377        res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
378        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
379            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
380        }
381        mr_msg(1, "Got xattr");
382    }
383    // acl
384    if (g_getfacl) {
385        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
386        if (!strstr(fname, "acl")) {
387            fatal_error("Wrong order, sunshine.");
388        }
389        if (*pctrl_chr != BLK_START_EXAT_FILE) {
390            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
391        }
392        read_file_from_stream_to_file(acl_fname, *ptmp_size);
393        res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
394        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
395            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
396        }
397        res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
398        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
399            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
400        }
401        mr_msg(1, "Got acl");
402    }
403    // tarball itself
404    res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
405    mr_msg(1, "now looking for afioball");
406    return (retval);
407}
408
409
410int write_EXAT_files_to_tape(char *xattr_fname,
411                             char *acl_fname)
412{
413    int res = 0;
414    if (g_getfattr) {
415    // xattr
416        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
417                             BLK_START_EXTENDED_ATTRIBUTES);
418        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
419                             BLK_START_EXAT_FILE);
420        write_file_to_stream_from_file(xattr_fname);
421        write_header_block_to_stream((off_t)-1, xattr_fname, BLK_STOP_EXAT_FILE);
422    }
423    if (g_getfacl) {
424    // acl
425        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
426                             BLK_START_EXAT_FILE);
427        write_file_to_stream_from_file(acl_fname);
428        write_header_block_to_stream((off_t)-1, acl_fname, BLK_STOP_EXAT_FILE);
429        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
430                             BLK_STOP_EXTENDED_ATTRIBUTES);
431    }
432    return (res);
433}
434
435
436
437
438/**
439 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
440 * @param tapeno The tape number to insist on.
441 * @bug There is currently no way to actually verify that the user has actually
442 * inserted the right tape.
443 */
444void insist_on_this_tape_number(int tapeno)
445{
446    int i;
447    char *tmp = NULL;
448
449    log_it("Insisting on tape #%d", tapeno);
450    if (g_current_media_number != tapeno) {
451        //      log_it("g_current_media_number = %d", g_current_media_number);
452        mr_asprintf(&tmp,
453                 _("When the tape drive goes quiet, please insert volume %d in this series."),
454                 tapeno);
455        popup_and_OK(tmp);
456        mr_free(tmp);
457        open_evalcall_form(_("Waiting while the tape drive settles"));
458    } else {
459        open_evalcall_form(_("Waiting while the tape drive rewinds"));
460    }
461
462    for (i = 0; i <= 100; i += 2) {
463        usleep(100000);
464        update_evalcall_form(i);
465    }
466    close_evalcall_form();
467    log_it("I assume user has inserted it. They _say_ they have...");
468    g_current_media_number = tapeno;
469
470    //  log_it("g_current_media_number = %d", g_current_media_number);
471    log_it("OK, I've finished insisting. On with the revelry.");
472}
473
474
475/**
476 * Debugging aid - log the offset we're at on the tape (reading or writing).
477 */
478void log_tape_pos(void)
479{
480    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
481           (long) g_tape_posK >> 10);
482}
483
484
485/**
486 * Add a file to a collection of recently archived filesets/slices.
487 * The type is determined by the filename: if it contains ".afio." it is
488 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
489 * otherwise we generate a fatal_error().
490 * @param td The current @c bkpinfo->tempdir (file will be placed in <tt>td</tt>/tmpfs/backcatalog/).
491 * @param latest_fname The file to place in the collection.
492 * @return 0, always.
493 * @bug Return value is redundant.
494 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
495 */
496int maintain_collection_of_recent_archives(char *td, char *latest_fname)
497{
498    long long final_alleged_writeK, final_projected_certain_writeK,
499        final_actually_certain_writeK = 0, cposK, bufsize_K;
500    int last = 0;
501    int i = 0;
502    t_archtype type = other;
503    char *command = NULL;
504    char *tmpdir = NULL;
505    char *old_fname = NULL;
506    struct mr_list_elt *elt = NULL;
507    struct s_tapecat_entry *te = NULL;
508
509    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
510    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
511        type = fileset;
512    } else if (strstr(latest_fname, "slice")) {
513        type = biggieslice;
514    } else {
515        log_it("fname = %s", latest_fname);
516        fatal_error
517            ("Unknown type. Internal error in maintain_collection_of_recent_archives()");
518    }
519
520    mr_asprintf(&tmpdir, "%s/tmpfs/backcatalog", td);
521    mkdir(tmpdir, 0x700);
522    mr_asprintf(&command, "cp -f %s %s", latest_fname, tmpdir);
523    if (run_program_and_log_output(command, 6)) {
524        log_it("Warning - failed to copy %s to backcatalog at %s",
525               latest_fname, tmpdir);
526    }
527    mr_free(command);
528
529    last = mr_list_length(tapecatalog) - 1;
530    if (last <= 0) {
531        iamhere("Too early to start deleting from collection.");
532        return (0);
533    }
534    elt = tapecatalog->last;
535    te = (struct s_tapecat_entry *)elt->data;
536    final_alleged_writeK = te->tape_posK;
537    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
538    while (elt != NULL) {
539        te = (struct s_tapecat_entry *)elt->data;
540        cposK = te->tape_posK;
541        if (cposK < final_projected_certain_writeK) {
542            final_actually_certain_writeK = cposK;
543            break;
544        }
545        elt = elt->prev;
546    }
547    if (elt == NULL) {
548        iamhere
549            ("Not far enough into tape to start deleting old archives from collection.");
550        return (0);
551    }
552
553    elt = elt->prev;
554    i = 0;
555    while ((elt != NULL) && (i < 10)) {
556        te = (struct s_tapecat_entry *)elt->data;
557        mr_asprintf(&old_fname, "%s/%s", tmpdir, te->fname);
558        unlink(old_fname);
559        mr_free(old_fname);
560        elt = elt->prev;
561        i++;
562    }
563    mr_free(tmpdir);
564    return (0);
565}
566
567
568/**
569 * Open the CD stream for input.
570 * @param bkpinfo The backup information structure. Passed to openin_tape().
571 * @return 0 for success, nonzero for failure.
572 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
573 */
574int openin_cdstream()
575{
576    return (openin_tape());
577}
578
579
580int set_tape_block_size_with_mt(char *tapedev,
581                                long internal_tape_block_size)
582{
583    char *tmp;
584    int res;
585
586    if (strncmp(tapedev, "/dev/", 5)) {
587        mr_msg(1,
588                "Not using 'mt setblk'. This isn't an actual /dev entry.");
589        return (0);
590    }
591    mr_asprintf(&tmp, "mt -f %s setblk %ld", tapedev,
592             internal_tape_block_size);
593    res = run_program_and_log_output(tmp, 3);
594    mr_free(tmp);
595    return (res);
596}
597
598
599/**
600 * Open the tape device for input.
601 * @param bkpinfo The backup information structure. Fields used:
602 * - @c bkpinfo->media_device
603 * - @c bkpinfo->tmpdir
604 * @return 0 for success, nonzero for failure.
605 * @note This will also work with a cdstream for now, but don't count on this behavior.
606 */
607int openin_tape()
608{
609    /*@ buffer ***************************************************** */
610    char fname[MAX_STR_LEN];
611    char *datablock = NULL;
612    char *tmp = NULL;
613    char old_cwd[MAX_STR_LEN];
614    char *outfname = NULL;
615    /*@ int ******************************************************* */
616    int i;
617    int j;
618    int res;
619    long length, templong;
620    size_t k;
621    int retval = 0;
622    int ctrl_chr;
623
624    /*@ long long ************************************************* */
625    long long size;
626
627    /*@ pointers ************************************************** */
628    FILE *fout;
629
630    /*@ end vars *************************************************** */
631
632    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
633    tapecatalog = mr_list_alloc();
634    g_tape_posK = 0;
635    if (g_tape_stream) {
636        log_it("FYI - I won't 'openin' the tape. It's already open.");
637        return (0);
638    }
639    insist_on_this_tape_number(1);
640    mr_asprintf(&outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
641    make_hole_for_file(outfname);
642
643    set_tape_block_size_with_mt(bkpinfo->media_device,
644                                bkpinfo->internal_tape_block_size);
645
646    log_it("Opening IN tape");
647    if (!
648        (g_tape_stream =
649         open_device_via_buffer(bkpinfo->media_device, 'r',
650                                bkpinfo->internal_tape_block_size))) {
651        log_to_screen(_("Cannot openin stream device"));
652        return (1);
653    }
654    log_to_screen(_("Reading stream"));
655    log_it("stream device = '%s'", bkpinfo->media_device);
656    /* skip data disks */
657    open_evalcall_form("Skipping data disks on stream");
658    log_to_screen(_("Skipping data disks on stream"));
659    if (!(fout = fopen(outfname, "w"))) {
660        log_OS_error(outfname);
661        log_to_screen(_("Cannot openout datadisk all.tar.gz file"));
662        return (-1);
663    }
664    datablock = (char *) mr_malloc(256 * 1024);
665    for (i = 0; i < 32; i++) {
666        for (j = 0; j < 4; j++) {
667            for (length = 0, k = 0; length < 256 * 1024; length += k) {
668                k = fread(datablock + length, 1, 256 * 1024 - length,
669                          g_tape_stream);
670            }
671            (void) fwrite(datablock, 1, (size_t) length, fout);
672            g_tape_posK += length / 1024;
673        }
674        if (i > 8)              // otherwise, 'buffer' distorts calculations
675        {
676            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
677            update_evalcall_form((int) (templong));
678        }
679    }
680    paranoid_fclose(fout);
681    mr_free(datablock);
682    /* find initial blocks */
683    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
684    retval += res;
685    if (ctrl_chr != BLK_START_OF_TAPE) {
686        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
687    }
688    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
689    retval += res;
690    if (ctrl_chr != BLK_START_OF_BACKUP) {
691        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
692    }
693    close_evalcall_form();
694    log_it("Saved all.tar.gz to '%s'", outfname);
695    (void) getcwd(old_cwd, MAX_STR_LEN);
696    chdir(bkpinfo->tmpdir);
697    mr_asprintf(&tmp, "tar -zxf %s tmp/mondo-restore.cfg 2> /dev/null",
698             outfname);
699    paranoid_system(tmp);
700    mr_free(tmp);
701    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
702    chdir(old_cwd);
703    unlink(outfname);
704    mr_free(outfname);
705    return (retval);
706}
707
708
709/**
710 * Start writing to a CD stream.
711 * @param cddev The CD device to openout via cdrecord.
712 * @param speed The speed to write at.
713 * @return 0 for success, nonzero for failure.
714 * @note This should be called only from backup processes.
715 */
716int openout_cdstream(char *cddev, int speed)
717{
718    /*@ buffers ***************************************************** */
719    char *command = NULL;
720
721    /*@ end vars *************************************************** */
722
723    /*  add 'dummy' if testing */
724    mr_asprintf(&command,
725             "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
726             cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
727    /*  initialise the catalog */
728    g_current_media_number = 1;
729    tapecatalog = mr_list_alloc();
730    /* log stuff */
731    log_it("Opening OUT cdstream with the command");
732    log_it(command);
733    /*  log_it("Let's see what happens, shall we?"); */
734    g_tape_stream = popen(command, "w");
735    mr_free(command);
736    if (g_tape_stream) {
737        return (0);
738    } else {
739        log_to_screen(_("Failed to openout to cdstream (fifo)"));
740        return (1);
741    }
742}
743
744
745/**
746 * Start writing to a tape device for the backup.
747 * @param tapedev The tape device to open for writing.
748 * @return 0 for success, nonzero for failure.
749 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
750 * EXISTING DATA on the tape!
751 */
752int openout_tape(char *tapedev, long internal_tape_block_size)
753{
754    g_current_media_number = 1;
755    if (g_tape_stream) {
756        log_it("FYI - I won't 'openout' the tape. It's already open.");
757        return (0);
758    }
759    tapecatalog = mr_list_alloc();
760    g_tape_posK = 0;
761
762    set_tape_block_size_with_mt(tapedev, internal_tape_block_size);
763    log_it("Opening OUT tape");
764    if (!
765        (g_tape_stream =
766         open_device_via_buffer(tapedev, 'w', internal_tape_block_size))) {
767        log_to_screen(_("Cannot openin stream device"));
768        return (1);
769    }
770    return (0);
771}
772
773
774/**
775 * Copy a file from the opened stream (CD or tape) to @p outfile.
776 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
777 * @param outfile The file to write to.
778 * @param size The size of the file in the input stream.
779 * @return 0 for success, nonzero for failure.
780 */
781int
782read_file_from_stream_to_file(char *outfile, long long size)
783{
784
785    /*@ int ******************************************************** */
786    int res;
787
788    /*@ end vars *************************************************** */
789
790    res = read_file_from_stream_FULL(outfile, NULL, size);
791
792    return (res);
793}
794
795
796/**
797 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
798 * by @p fout.
799 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
800 * @param fout The stream to write the file to.
801 * @param size The size of the file in bytes.
802 * @return 0 for success, nonzero for failure.
803 */
804int
805read_file_from_stream_to_stream(FILE * fout, long long size)
806{
807
808    /*@ int ******************************************************** */
809    int res;
810
811    /*@ end vars *************************************************** */
812
813    res = read_file_from_stream_FULL(NULL, fout, size);
814    return (res);
815}
816
817
818/**
819 * Copy a file from the currently opened stream (CD or tape) to either a
820 * @c FILE pointer indicating a currently-opened file, or a filename indicating
821 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
822 * and read_file_from_stream_to_stream() are wrappers for.
823 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
824 * @param outfname If non-NULL, write to this file.
825 * @param foutstream If non-NULL, write to this stream.
826 * @param orig_size The original length of the file in bytes.
827 * @return 0 for success, nonzero for failure.
828 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
829 */
830int
831read_file_from_stream_FULL(char *outfname, FILE * foutstream, long long orig_size)
832{
833    /*@ buffers ***************************************************** */
834    char *tmp = NULL;
835    char *datablock = NULL;
836    char *temp_fname;
837    char *temp_cksum;
838    char *actual_cksum = NULL;
839
840    /*@ int ********************************************************* */
841    int retval = 0;
842#ifdef EXTRA_TAPE_CHECKSUMS
843    int i, ch;
844#endif
845    int noof_blocks;
846    int ctrl_chr;
847    int res;
848    /*@ pointers **************************************************** */
849    FILE *fout;
850
851    /*@ long    ***************************************************** */
852    long bytes_to_write = 0L;
853
854    /*@ long long *************************************************** */
855    long long temp_size, size;
856    long bytes_read, bytes_to_read;
857    long long total_read_from_tape_for_this_file = 0;
858    long long where_I_was_before_tape_change = 0;
859    /*@ unsigned int ************************************************ */
860    unsigned int crc16;
861    unsigned int crctt;
862
863    bool had_to_resync = FALSE;
864
865    /*@ init  ******************************************************* */
866    malloc_string(temp_fname);
867    malloc_string(temp_cksum);
868    datablock = mr_malloc(mr_conf->external_tape_blocksize);
869    crc16 = 0;
870    crctt = 0;
871    size = orig_size;
872
873    /*@ end vars *************************************************** */
874
875    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
876    if (orig_size != temp_size && orig_size != -1) {
877        mr_asprintf(&tmp,
878                 "output file's size should be %ld K but is apparently %ld K",
879                 (long) size >> 10, (long) temp_size >> 10);
880        log_to_screen(tmp);
881        mr_free(tmp);
882    }
883    if (ctrl_chr != BLK_START_FILE) {
884        wrong_marker(BLK_START_FILE, ctrl_chr);
885        return (1);
886    }
887    /* Not used
888    mr_asprintf(&tmp, "Reading file from tape; writing to '%s'; %ld KB",
889             outfname, (long) size >> 10);
890            */
891
892    if (foutstream) {
893        fout = foutstream;
894    } else {
895        fout = fopen(outfname, "w");
896    }
897    if (!fout) {
898        log_OS_error(outfname);
899        log_to_screen(_("Cannot openout file"));
900        return (1);
901    }
902    total_read_from_tape_for_this_file = 0;
903    for (noof_blocks = 0; size > 0;
904         noof_blocks++, size -=
905         bytes_to_write, total_read_from_tape_for_this_file +=
906         bytes_read) {
907        bytes_to_write =
908            (size < mr_conf->external_tape_blocksize) ? (long) size : mr_conf->external_tape_blocksize;
909        bytes_to_read = mr_conf->external_tape_blocksize;
910        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
911        while (bytes_read < bytes_to_read) {    // next tape!
912//    crctt=crc16=0;
913            where_I_was_before_tape_change = size;
914            mr_msg(4, "where_I_was_... = %lld",
915                    where_I_was_before_tape_change);
916            start_to_read_from_next_tape();
917            mr_msg(4, "Started reading from next tape.");
918            skip_incoming_files_until_we_find_this_one(temp_fname);
919            mr_msg(4, "Skipped irrelevant files OK.");
920            for (size = orig_size; size > where_I_was_before_tape_change;
921                 size -= bytes_to_write) {
922                bytes_read =
923                    fread(datablock, 1, bytes_to_read, g_tape_stream);
924            }
925            mr_msg(4, "'size' is now %lld (should be %lld)", size,
926                    where_I_was_before_tape_change);
927            log_to_screen("Successfully re-sync'd tape");
928            had_to_resync = TRUE;
929            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
930        }
931
932        (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
933
934#ifdef EXTRA_TAPE_CHECKSUMS
935        for (i = 0; i < (int) bytes_to_write; i++) {
936            ch = datablock[i];
937            crc16 = updcrcr(crc16, (unsigned) ch);
938            crctt = updcrc(crctt, (unsigned) ch);
939        }
940#endif
941    }
942    mr_msg(6, "Total read from tape for this file = %lld",
943            total_read_from_tape_for_this_file);
944    mr_msg(6, ".......................... Should be %lld", orig_size);
945    g_tape_posK += total_read_from_tape_for_this_file / 1024;
946    mr_asprintf(&actual_cksum, "%04x%04x", crc16, crctt);
947    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
948    } else {
949        paranoid_fclose(fout);
950    }
951    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
952    if (ctrl_chr != BLK_STOP_FILE) {
953        wrong_marker(BLK_STOP_FILE, ctrl_chr);
954//      fatal_error("Bad marker"); // return(1);
955    }
956    if (strcmp(temp_cksum, actual_cksum)) {
957        mr_asprintf(&tmp, _("actual cksum=%s; recorded cksum=%s"), actual_cksum,
958                 temp_cksum);
959        log_to_screen(tmp);
960        mr_free(tmp);
961
962        mr_asprintf(&tmp, _("%s (%ld K) is corrupt on tape"), temp_fname,
963                 (long) orig_size >> 10);
964        log_to_screen(tmp);
965        mr_free(tmp);
966        retval++;
967    }
968    mr_free(actual_cksum);
969    mr_free(datablock);
970    mr_free(temp_fname);
971    mr_free(temp_cksum);
972    return (retval);
973}
974
975
976/**
977 * Read a header block from the currently opened stream (CD or tape).
978 * This block indicates the length of the following file (if it's file-related)
979 * the filename (if it's file-related), and the block type.
980 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
981 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
982 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
983 * @return 0 for success, nonzero for failure.
984 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
985 */
986int
987read_header_block_from_stream(long long *plen, char *filename,
988                              int *pcontrol_char)
989{
990
991    /*@ buffers ***************************************************** */
992    char *tempblock;
993
994    /*@ int ********************************************************* */
995    int i, retval;
996
997    /*@ end vars *************************************************** */
998
999    tempblock = (char *) mr_malloc((size_t) mr_conf->external_tape_blocksize);
1000
1001    for (i = 0; i < (int) mr_conf->external_tape_blocksize; i++) {
1002        tempblock[i] = 0;
1003    }
1004    while (!(*pcontrol_char = tempblock[7000])) {
1005        g_tape_posK +=
1006            fread(tempblock, 1, (size_t) mr_conf->external_tape_blocksize,
1007                  g_tape_stream) / 1024;
1008    }
1009    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1010    if (strcmp(tempblock + 6000 + *pcontrol_char, "Mondolicious, baby")) {
1011        log_it("Bad header block at %ld K", (long) g_tape_posK);
1012    }
1013    strcpy(filename, tempblock + 1000);
1014    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1015        log_to_screen("I can't verify an aborted backup.");
1016        retval = 1;
1017    } else {
1018        retval = 0;
1019    }
1020    for (i = 1000; i < 1020; i++) {
1021        if (tempblock[i] < 32 || tempblock[i] > 126) {
1022            tempblock[i] = ' ';
1023        }
1024    }
1025    tempblock[i] = '\0';
1026    mr_msg(6, "%s (fname=%s, size=%ld K)",
1027            marker_to_string(*pcontrol_char), tempblock + 1000,
1028            (long) (*plen) >> 10);
1029    mr_free(tempblock);
1030    return (retval);
1031}
1032
1033
1034/**
1035 * Add specified file/slice to the internal catalog of all archives written.
1036 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1037 * write the last [buffer size] MB from the catalog to the new tape, so we know
1038 * we have @e all archives on some CD/tape/whatever.
1039 * @param type The type of file we're cataloging (afioball, slice, something else)
1040 * @param number The fileset number or biggiefile number.
1041 * @param aux The slice number if it's a biggiefile, or any other additional info.
1042 * @param fn The original full pathname of the file we're recording.
1043 * @return The index of the record we just added.
1044 */
1045int register_in_tape_catalog(t_archtype type, int number, long aux,
1046                             char *fn)
1047{
1048    char *fname = NULL;
1049    char *p = NULL;
1050    struct s_tapecat_entry *te = NULL;
1051    struct mr_list_elt *elt = NULL;
1052
1053    p = strrchr(fn, '/');
1054    if (p) {
1055        p++;
1056    } else {
1057        p = fn;
1058    }
1059    mr_asprintf(&fname, p);
1060
1061    te = (struct s_tapecat_entry *)mr_malloc(sizeof(struct s_tapecat_entry));
1062    te->type = type;
1063    te->number = number;
1064    te->aux = aux;
1065    te->tape_posK = g_tape_posK;
1066    /* BERLIOS: Check if this is written womewhere, as it's only a pointer */
1067    /* BERLIOS: Verify to purge fname correctly */
1068    te->fname = fname;
1069
1070    /* place the data in a list elt */
1071    elt = mr_list_alloc_elt((void *)te, mr_free_te);
1072    mr_list_add_elt_last(tapecatalog, elt);
1073
1074    // returns the index of the record we've just added
1075    return (mr_list_length(tapecatalog));
1076}
1077
1078
1079/**
1080 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1081 * (got SIGPIPE) or look like we will.
1082 * @param mediasize The size of the tape in megabytes.
1083 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1084 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1085 * autodetecting the size. Huh?
1086 */
1087
1088/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1089bool
1090should_we_write_to_next_tape(long mediasize,
1091                             off_t length_of_incoming_file)
1092{
1093    /*@ bool's ***************************************************** */
1094    bool we_need_a_new_tape = FALSE;
1095
1096    /*@ end vars *************************************************** */
1097
1098    if (mediasize == 0) {
1099        return (FALSE);
1100    }
1101    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1102        log_it("mediasize = %ld", mediasize);
1103        we_need_a_new_tape = TRUE;
1104        log_to_screen(_("Should have started a new tape/CD already"));
1105    }
1106    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1107        mediasize - 16) { /* 4096(old SLICE_SIZE) * 4 / 1024) */
1108        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1109               mediasize);
1110        we_need_a_new_tape = TRUE;
1111    }
1112    return (we_need_a_new_tape);
1113}
1114
1115
1116/**
1117 * Seek through the stream until we find a header block where the NAME field matches
1118 * @p the_file_I_was_reading. This is useful if you've just started reading from
1119 * a new tape and want to find the file you were reading when the tape ended.
1120 * @param the_file_I_was_reading File name to look for.
1121 * @return 0 for success, nonzero for failure.
1122 */
1123int skip_incoming_files_until_we_find_this_one(char
1124                                               *the_file_I_was_reading)
1125{
1126    char *pA;
1127    char *pB;
1128    int res;
1129    int ctrl_chr;
1130    char *temp_fname;
1131    char *datablock;
1132    long long temp_size, size;
1133    long bytes_to_write;
1134
1135    datablock = mr_malloc(mr_conf->external_tape_blocksize);
1136    malloc_string(temp_fname);
1137    pB = strrchr(the_file_I_was_reading, '/');
1138    if (pB) {
1139        pB++;
1140    } else {
1141        pB = the_file_I_was_reading;
1142    }
1143    mr_msg(1, "skip_incoming_..(%s)", pB);
1144    mr_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1145    ctrl_chr = -1;
1146    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1147        res =
1148            read_header_block_from_stream(&temp_size, temp_fname,
1149                                          &ctrl_chr);
1150        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1151            break;
1152        }
1153        mr_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1154        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1155        mr_msg(3, "Still trying to re-sync w/ tape");
1156    }
1157    while (ctrl_chr != BLK_START_FILE) {
1158        res =
1159            read_header_block_from_stream(&temp_size, temp_fname,
1160                                          &ctrl_chr);
1161        if (ctrl_chr == BLK_START_FILE) {
1162            break;
1163        }
1164        mr_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1165        wrong_marker(BLK_START_FILE, ctrl_chr);
1166        mr_msg(3, "Still trying to re-sync w/ tape");
1167    }
1168    pA = strrchr(temp_fname, '/');
1169    if (pA) {
1170        pA++;
1171    } else {
1172        pA = temp_fname;
1173    }
1174    pB = strrchr(the_file_I_was_reading, '/');
1175    if (pB) {
1176        pB++;
1177    } else {
1178        pB = the_file_I_was_reading;
1179    }
1180    while (strcmp(pA, pB)) {
1181        mr_msg(6, "Skipping %s (it's not %s)", temp_fname,
1182                the_file_I_was_reading);
1183        for (size = temp_size; size > 0; size -= bytes_to_write) {
1184            bytes_to_write =
1185                (size < mr_conf->external_tape_blocksize) ? (long) size : mr_conf->external_tape_blocksize;
1186            // FIXME - needs error-checking and -catching
1187            fread(datablock, 1, (size_t) mr_conf->external_tape_blocksize, g_tape_stream);
1188        }
1189        res =
1190            read_header_block_from_stream(&temp_size, temp_fname,
1191                                          &ctrl_chr);
1192        if (ctrl_chr != BLK_STOP_FILE) {
1193            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1194        }
1195        res =
1196            read_header_block_from_stream(&temp_size, temp_fname,
1197                                          &ctrl_chr);
1198        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1199            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1200        }
1201        res =
1202            read_header_block_from_stream(&temp_size, temp_fname,
1203                                          &ctrl_chr);
1204        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1205            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1206        }
1207        res =
1208            read_header_block_from_stream(&temp_size, temp_fname,
1209                                          &ctrl_chr);
1210        if (ctrl_chr != BLK_START_FILE) {
1211            wrong_marker(BLK_START_FILE, ctrl_chr);
1212        }
1213        pA = strrchr(temp_fname, '/');
1214        if (pA) {
1215            pA++;
1216        } else {
1217            pA = temp_fname;
1218        }
1219        pB = strrchr(the_file_I_was_reading, '/');
1220        if (pB) {
1221            pB++;
1222        } else {
1223            pB = the_file_I_was_reading;
1224        }
1225    }
1226    mr_msg(2, "Reading %s (it matches %s)", temp_fname,
1227            the_file_I_was_reading);
1228    mr_free(temp_fname);
1229    mr_free(datablock);
1230    return (0);
1231}
1232
1233
1234/**
1235 * Start to read from the next tape. Assumes the user has already inserted it.
1236 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1237 * @return 0 for success, nonzero for failure.
1238 */
1239int start_to_read_from_next_tape()
1240{
1241    /*@ int ********************************************************* */
1242    int res = 0;
1243    char *sz_msg;
1244    int ctrlchr;
1245    long long temp_size;
1246    malloc_string(sz_msg);
1247    /*@ end vars *************************************************** */
1248
1249    paranoid_pclose(g_tape_stream);
1250    sync();
1251    sync();
1252    sync();
1253    log_it("Next tape requested.");
1254    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1255    log_it("Opening IN the next tape");
1256    if (!
1257        (g_tape_stream =
1258         open_device_via_buffer(bkpinfo->media_device, 'r',
1259                                bkpinfo->internal_tape_block_size))) {
1260        log_to_screen(_("Cannot openin stream device"));
1261        return (1);
1262    }
1263    g_tape_posK = 0;
1264    g_sigpipe = FALSE;
1265    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1266    if (ctrlchr != BLK_START_OF_TAPE) {
1267        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1268    }
1269    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1270    if (ctrlchr != BLK_START_OF_BACKUP) {
1271        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1272    } else {
1273        mr_msg(3, "Next tape opened OK. Whoopee!");
1274    }
1275    mr_free(sz_msg);
1276    return (res);
1277}
1278
1279
1280/**
1281 * Start to write to the next tape. Assume the user has already inserted it.
1282 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1283 * @return 0 for success, nonzero for failure.
1284 */
1285int start_to_write_to_next_tape()
1286{
1287    int res = 0;
1288    char *command = NULL;
1289
1290    paranoid_pclose(g_tape_stream);
1291    sync();
1292    sync();
1293    sync();
1294    log_it("New tape requested.");
1295    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1296    if (bkpinfo->backup_media_type == cdstream) {
1297        mr_asprintf(&command,
1298                 "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1299                 bkpinfo->iso_burning_dev, bkpinfo->writer_speed, MONDO_LOGFILE,
1300                 MONDO_LOGFILE);
1301        log_it("Opening OUT to next CD with the command");
1302        log_it(command);
1303        log_it("Let's see what happens, shall we?");
1304        g_tape_stream = popen(command, "w");
1305        mr_free(command);
1306        if (!g_tape_stream) {
1307            log_to_screen(_("Failed to openout to cdstream (fifo)"));
1308            return (1);
1309        }
1310    } else {
1311        log_it("Opening OUT to next tape");
1312        if (!
1313            (g_tape_stream =
1314             open_device_via_buffer(bkpinfo->media_device, 'w',
1315                                    bkpinfo->internal_tape_block_size))) {
1316            log_to_screen(_("Cannot openin stream device"));
1317            return (1);
1318        }
1319    }
1320    g_tape_posK = 0;
1321    g_sigpipe = FALSE;
1322    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1323    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1324    return (res);
1325}
1326
1327
1328/**
1329 * Write a bufferfull of the most recent archives to the tape. The
1330 * rationale behind this is a bit complex. If the previous tape ended
1331 * suddenly (EOF or otherwise) some archives were probably left in the
1332 * buffer. That means that Mondo thinks they have been written, but
1333 * the external binary @c buffer has not actually written them. So to
1334 * be safe, we start the new tape by writing the last bufferfull from
1335 * the old one. This insures that all archives will be on at least
1336 * one tape. Sounds inelegant, but it works.
1337 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1338 * @return 0 for success, nonzero for failure.
1339 */
1340int write_backcatalog_to_tape()
1341{
1342    int res = 0;
1343    char *fname = NULL;
1344    struct mr_list_elt *elt = NULL;
1345    struct s_tapecat_entry *te = NULL;
1346
1347    mr_msg(2, "I am now writing back catalog to tape");
1348    elt = tapecatalog->first;
1349    while (elt != NULL) {
1350        te = (struct s_tapecat_entry *) elt->data;
1351        mr_asprintf(&fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir, te->fname);
1352        if (!does_file_exist(fname)) {
1353            mr_msg(6, "Can't write %s - it doesn't exist.", fname);
1354        } else {
1355            write_header_block_to_stream(length_of_file(fname),
1356                                         "start-backcatalog-afio-or-slice",
1357                                         BLK_START_AN_AFIO_OR_SLICE);
1358            mr_msg(2, "Writing %s", fname);
1359            if (write_file_to_stream_from_file(fname)) {
1360                res++;
1361                mr_msg(2, "%s failed", fname);
1362            }
1363            if (elt != tapecatalog->last) {
1364                write_header_block_to_stream((off_t)0,
1365                                             "stop-backcatalog-afio-or-slice",
1366                                             BLK_STOP_AN_AFIO_OR_SLICE);
1367            }
1368        }
1369        mr_free(fname);
1370        elt = elt->next;
1371    }
1372    mr_msg(2, "Finished writing back catalog to tape");
1373    return (res);
1374}
1375
1376
1377/**
1378 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1379 * @param fname The path to all.tar.gz.
1380 * @return 0 for success, nonzero for failure.
1381 */
1382int write_data_disks_to_stream(char *fname)
1383{
1384    /*@ pointers *************************************************** */
1385    FILE *fin = NULL;
1386    char *tmp = NULL;
1387
1388    /*@ long ******************************************************* */
1389    long m = -1;
1390    long templong;
1391
1392    /*@ int ******************************************************** */
1393    int i, j;
1394
1395    /*@ buffers **************************************************** */
1396    char tempblock[256 * 1024];
1397
1398    /*@ end vars *************************************************** */
1399
1400    open_evalcall_form(_("Writing data disks to tape"));
1401    log_to_screen(_("Writing data disks to tape"));
1402    log_it("Data disks = %s", fname);
1403    if (!does_file_exist(fname)) {
1404        mr_asprintf(&tmp, _("Cannot find %s"), fname);
1405        log_to_screen(tmp);
1406        mr_free(tmp);
1407        return (1);
1408    }
1409    if (!(fin = fopen(fname, "r"))) {
1410        log_OS_error(fname);
1411        fatal_error("Cannot openin the data disk");
1412    }
1413    for (i = 0; i < 32; i++) {  /* 32MB */
1414        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1415            if (!feof(fin)) {
1416                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1417            } else {
1418                m = 0;
1419            }
1420            for (; m < 256 * 1024; m++) {
1421                tempblock[m] = '\0';
1422            }
1423            g_tape_posK +=
1424                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1425        }
1426        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1427        {
1428            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1429            update_evalcall_form((int) (templong));
1430        }
1431    }
1432    paranoid_fclose(fin);
1433    close_evalcall_form();
1434    return (0);
1435}
1436
1437
1438/**
1439 * Copy @p infile to the opened stream (CD or tape).
1440 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1441 * @param infile The file to write to the stream.
1442 * @return 0 for success, nonzero for failure.
1443 */
1444int write_file_to_stream_from_file(char *infile)
1445{
1446    /*@ buffers **************************************************** */
1447    char *tmp = NULL;
1448    char *datablock = NULL;
1449    char *checksum = NULL;
1450    char *infile_basename = NULL;
1451
1452    /*@ int ******************************************************** */
1453    int retval = 0;
1454    int noof_blocks;
1455
1456    /*  unsigned int ch; */
1457    unsigned int crc16;
1458    unsigned int crctt;
1459
1460    /*@ pointers *************************************************** */
1461    FILE *fin;
1462    char *p;
1463
1464    /*@ long ******************************************************* */
1465    long bytes_to_read = 0;
1466    long i;
1467
1468    off_t filesize;
1469
1470#ifdef EXTRA_TAPE_CHECKSUMS
1471    int ch;
1472#endif
1473
1474    /*@ initialize ************************************************ */
1475    crc16 = 0;
1476    crctt = 0;
1477    datablock = mr_malloc(mr_conf->external_tape_blocksize);
1478
1479    /*@ end vars *************************************************** */
1480
1481    infile_basename = strrchr(infile, '/');
1482    if (infile_basename) {
1483        infile_basename++;
1484    } else {
1485        infile_basename = infile;
1486    }
1487    filesize = length_of_file(infile);
1488    if (should_we_write_to_next_tape
1489        (bkpinfo->media_size, filesize)) {
1490        start_to_write_to_next_tape();
1491        write_backcatalog_to_tape();
1492    }
1493    p = strrchr(infile, '/');
1494    if (!p) {
1495        p = infile;
1496    } else {
1497        p++;
1498    }
1499    mr_asprintf(&tmp, "Writing file '%s' to tape (%ld KB)", p,
1500             (long) filesize >> 10);
1501    log_it(tmp);
1502    mr_free(tmp);
1503
1504    write_header_block_to_stream(filesize, infile_basename,
1505                                 BLK_START_FILE);
1506//go_here_to_restart_saving_of_file:
1507    if (!(fin = fopen(infile, "r"))) {
1508        log_OS_error(infile);
1509        return (1);
1510    }
1511    for (noof_blocks = 0; filesize > 0;
1512         noof_blocks++, filesize -= bytes_to_read) {
1513        if (filesize < mr_conf->external_tape_blocksize) {
1514            bytes_to_read = (long) filesize;
1515            for (i = 0; i < mr_conf->external_tape_blocksize; i++) {
1516                datablock[i] = '\0';
1517            }
1518        } else {
1519            bytes_to_read = mr_conf->external_tape_blocksize;
1520        }
1521        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1522        g_tape_posK += fwrite(datablock, 1, /*bytes_to_read */
1523                              (size_t) mr_conf->external_tape_blocksize,
1524                              g_tape_stream) / 1024;
1525        if (g_sigpipe) {
1526            iamhere("Sigpipe occurred recently. I'll start a new tape.");
1527            fclose(fin);
1528            g_sigpipe = FALSE;
1529            start_to_write_to_next_tape();
1530            write_backcatalog_to_tape();    // kinda-sorta recursive :)
1531            return (0);
1532        }
1533#ifdef EXTRA_TAPE_CHECKSUMS
1534        for (i = 0; i < bytes_to_read; i++) {
1535            ch = datablock[i];
1536            crc16 = updcrcr(crc16, (unsigned) ch);
1537            crctt = updcrc(crctt, (unsigned) ch);
1538        }
1539#endif
1540    }
1541    paranoid_free(datablock);
1542    paranoid_fclose(fin);
1543    mr_asprintf(&checksum, "%04x%04x", crc16, crctt);
1544    /* BERLIOS: what does it do ??? */
1545    write_header_block_to_stream((off_t)g_current_media_number, checksum,
1546                                 BLK_STOP_FILE);
1547    mr_free(checksum);
1548//  log_it("File '%s' written to tape.", infile);
1549    return (retval);
1550}
1551
1552
1553/**
1554 * Write a header block to the opened stream (CD or tape).
1555 * @param length_of_incoming_file The length to store in the header block.
1556 * Usually matters only if this is a file-related header, in which case it should
1557 * be the length of the file that will follow.
1558 * @param filename The filename to store in the header block. Usually matters
1559 * only if this is a file-related header, in which case this should be the name
1560 * if the file that will follow.
1561 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1562 * @return 0 for success, nonzero for failure.
1563 */
1564int
1565write_header_block_to_stream(off_t length_of_incoming_file,
1566                             char *filename, int control_char)
1567{
1568    /*@ buffers **************************************************** */
1569    char *tempblock;
1570    char *p;
1571
1572    /*@ int ******************************************************** */
1573    int i;
1574
1575    off_t olen;
1576
1577    /*@ end vars *************************************************** */
1578
1579    tempblock = mr_malloc(mr_conf->external_tape_blocksize);
1580
1581    olen = length_of_incoming_file;
1582    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1583    if (!p) {
1584        p = filename;
1585    } else {
1586        p++;
1587    }
1588    if (!g_tape_stream) {
1589        log_to_screen
1590            (_("You're not backing up to tape. Why write a tape header?"));
1591        return (1);
1592    }
1593    for (i = 0; i < (int) mr_conf->external_tape_blocksize; i++) {
1594        tempblock[i] = 0;
1595    }
1596    sprintf(tempblock + 6000 + control_char, "Mondolicious, baby");
1597    tempblock[7000] = control_char;
1598    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1599    strcpy(tempblock + 1000, filename);
1600    g_tape_posK +=
1601        fwrite(tempblock, 1, (size_t) mr_conf->external_tape_blocksize,
1602               g_tape_stream) / 1024;
1603    paranoid_free(tempblock);
1604    mr_msg(6, "%s (fname=%s, size=%ld K)",
1605            marker_to_string(control_char), p,
1606            (long) length_of_incoming_file >> 10);
1607    return (0);
1608}
1609
1610
1611/**
1612 * Log (to screen) an erroneous marker, along with what it should have been.
1613 * @param should_be What we were expecting.
1614 * @param it_is What we got.
1615 */
1616void wrong_marker(int should_be, int it_is)
1617{
1618    /*@ buffer ***************************************************** */
1619    char *tmp = NULL;
1620
1621
1622    /*@ end vars *************************************************** */
1623    mr_asprintf(&tmp, _("Wrong marker! (Should be %s, is actually %s)"),
1624             marker_to_string(should_be), marker_to_string(it_is));
1625    log_to_screen(tmp);
1626    mr_free(tmp);
1627}
1628
1629/* @} - end of streamGroup */
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