source: branches/stable/mondo/src/common/libmondo-stream.c @ 1594

Last change on this file since 1594 was 1594, checked in by bruno, 12 years ago

Use of conf file entries (iso_burning_*, media_device, media_size)
and adapatation of the rest of the code to that (including bkpinfo)

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File size: 46.3 KB
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1/* $Id: libmondo-stream.c 1594 2007-08-26 10:26:06Z 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 1594 2007-08-26 10:26:06Z 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    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);
332    strcpy(tmp, call_program_and_get_last_line_of_output(command));
333    mr_free(command);
334
335    siz[0] = '\0';
336    log_it("res=%d; dev=%s", res, dev);
337
338    if (res) {
339        return (res);
340    }
341
342    if (strlen(tmp) < 2) {
343        siz[0] = '\0';
344        log_it("Warning - size of tape unknown");
345        return (0);
346    } else {
347        strcpy(siz, tmp);
348        return (0);
349    }
350}
351
352
353int read_EXAT_files_from_tape(struct s_bkpinfo *bkpinfo,
354                              long long *ptmp_size, char *tmp_fname,
355                              int *pctrl_chr, char *xattr_fname,
356                              char *acl_fname)
357{
358    int res = 0;
359    int retval = 0;
360    char *fname = (char *)&res;                 /* Should NOT be NULL */
361
362// xattr
363    if (g_getfattr) {
364        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
365        if (*pctrl_chr != BLK_START_EXAT_FILE) {
366            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
367        }
368        if (!strstr(fname, "xattr")) {
369            fatal_error("Wrong order, sunshine.");
370        }
371        read_file_from_stream_to_file(bkpinfo, xattr_fname, *ptmp_size);
372        res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
373        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
374            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
375        }
376        mr_msg(1, "Got xattr");
377    }
378    // acl
379    if (g_getfacl) {
380        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
381        if (!strstr(fname, "acl")) {
382            fatal_error("Wrong order, sunshine.");
383        }
384        if (*pctrl_chr != BLK_START_EXAT_FILE) {
385            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
386        }
387        read_file_from_stream_to_file(bkpinfo, acl_fname, *ptmp_size);
388        res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
389        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
390            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
391        }
392        res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
393        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
394            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
395        }
396        mr_msg(1, "Got acl");
397    }
398    // tarball itself
399    res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
400    mr_msg(1, "now looking for afioball");
401    return (retval);
402}
403
404
405int write_EXAT_files_to_tape(struct s_bkpinfo *bkpinfo, char *xattr_fname,
406                             char *acl_fname)
407{
408    int res = 0;
409    if (g_getfattr) {
410    // xattr
411        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
412                             BLK_START_EXTENDED_ATTRIBUTES);
413        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
414                             BLK_START_EXAT_FILE);
415        write_file_to_stream_from_file(bkpinfo, xattr_fname);
416        write_header_block_to_stream((off_t)-1, xattr_fname, BLK_STOP_EXAT_FILE);
417    }
418    if (g_getfacl) {
419    // acl
420        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
421                             BLK_START_EXAT_FILE);
422        write_file_to_stream_from_file(bkpinfo, acl_fname);
423        write_header_block_to_stream((off_t)-1, acl_fname, BLK_STOP_EXAT_FILE);
424        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
425                             BLK_STOP_EXTENDED_ATTRIBUTES);
426    }
427    return (res);
428}
429
430
431
432
433/**
434 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
435 * @param tapeno The tape number to insist on.
436 * @bug There is currently no way to actually verify that the user has actually
437 * inserted the right tape.
438 */
439void insist_on_this_tape_number(int tapeno)
440{
441    int i;
442    char *tmp = NULL;
443
444    log_it("Insisting on tape #%d", tapeno);
445    if (g_current_media_number != tapeno) {
446        //      log_it("g_current_media_number = %d", g_current_media_number);
447        mr_asprintf(&tmp,
448                 _("When the tape drive goes quiet, please insert volume %d in this series."),
449                 tapeno);
450        popup_and_OK(tmp);
451        mr_free(tmp);
452        open_evalcall_form(_("Waiting while the tape drive settles"));
453    } else {
454        open_evalcall_form(_("Waiting while the tape drive rewinds"));
455    }
456
457    for (i = 0; i <= 100; i += 2) {
458        usleep(100000);
459        update_evalcall_form(i);
460    }
461    close_evalcall_form();
462    log_it("I assume user has inserted it. They _say_ they have...");
463    g_current_media_number = tapeno;
464
465    //  log_it("g_current_media_number = %d", g_current_media_number);
466    log_it("OK, I've finished insisting. On with the revelry.");
467}
468
469
470/**
471 * Debugging aid - log the offset we're at on the tape (reading or writing).
472 */
473void log_tape_pos(void)
474{
475    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
476           (long) g_tape_posK >> 10);
477}
478
479
480/**
481 * Add a file to a collection of recently archived filesets/slices.
482 * The type is determined by the filename: if it contains ".afio." it is
483 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
484 * otherwise we generate a fatal_error().
485 * @param td The current @c bkpinfo->tempdir (file will be placed in <tt>td</tt>/tmpfs/backcatalog/).
486 * @param latest_fname The file to place in the collection.
487 * @return 0, always.
488 * @bug Return value is redundant.
489 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
490 */
491int maintain_collection_of_recent_archives(char *td, char *latest_fname)
492{
493    long long final_alleged_writeK, final_projected_certain_writeK,
494        final_actually_certain_writeK = 0, cposK, bufsize_K;
495    int last = 0;
496    int i = 0;
497    t_archtype type = other;
498    char *command = NULL;
499    char *tmpdir = NULL;
500    char *old_fname = NULL;
501    struct mr_list_elt *elt = NULL;
502    struct s_tapecat_entry *te = NULL;
503
504    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
505    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
506        type = fileset;
507    } else if (strstr(latest_fname, "slice")) {
508        type = biggieslice;
509    } else {
510        log_it("fname = %s", latest_fname);
511        fatal_error
512            ("Unknown type. Internal error in maintain_collection_of_recent_archives()");
513    }
514
515    mr_asprintf(&tmpdir, "%s/tmpfs/backcatalog", td);
516    mkdir(tmpdir, 0x700);
517    mr_asprintf(&command, "cp -f %s %s", latest_fname, tmpdir);
518    if (run_program_and_log_output(command, 6)) {
519        log_it("Warning - failed to copy %s to backcatalog at %s",
520               latest_fname, tmpdir);
521    }
522    mr_free(command);
523
524    last = mr_list_length(tapecatalog) - 1;
525    if (last <= 0) {
526        iamhere("Too early to start deleting from collection.");
527        return (0);
528    }
529    elt = tapecatalog->last;
530    te = (struct s_tapecat_entry *)elt->data;
531    final_alleged_writeK = te->tape_posK;
532    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
533    while (elt != NULL) {
534        te = (struct s_tapecat_entry *)elt->data;
535        cposK = te->tape_posK;
536        if (cposK < final_projected_certain_writeK) {
537            final_actually_certain_writeK = cposK;
538            break;
539        }
540        elt = elt->prev;
541    }
542    if (elt == NULL) {
543        iamhere
544            ("Not far enough into tape to start deleting old archives from collection.");
545        return (0);
546    }
547
548    elt = elt->prev;
549    i = 0;
550    while ((elt != NULL) && (i < 10)) {
551        te = (struct s_tapecat_entry *)elt->data;
552        mr_asprintf(&old_fname, "%s/%s", tmpdir, te->fname);
553        unlink(old_fname);
554        mr_free(old_fname);
555        elt = elt->prev;
556        i++;
557    }
558    mr_free(tmpdir);
559    return (0);
560}
561
562
563/**
564 * Open the CD stream for input.
565 * @param bkpinfo The backup information structure. Passed to openin_tape().
566 * @return 0 for success, nonzero for failure.
567 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
568 */
569int openin_cdstream(struct s_bkpinfo *bkpinfo)
570{
571    return (openin_tape(bkpinfo));
572}
573
574
575int set_tape_block_size_with_mt(char *tapedev,
576                                long internal_tape_block_size)
577{
578    char *tmp;
579    int res;
580
581    if (strncmp(tapedev, "/dev/", 5)) {
582        mr_msg(1,
583                "Not using 'mt setblk'. This isn't an actual /dev entry.");
584        return (0);
585    }
586    mr_asprintf(&tmp, "mt -f %s setblk %ld", tapedev,
587             internal_tape_block_size);
588    res = run_program_and_log_output(tmp, 3);
589    mr_free(tmp);
590    return (res);
591}
592
593
594/**
595 * Open the tape device for input.
596 * @param bkpinfo The backup information structure. Fields used:
597 * - @c bkpinfo->media_device
598 * - @c bkpinfo->tmpdir
599 * @return 0 for success, nonzero for failure.
600 * @note This will also work with a cdstream for now, but don't count on this behavior.
601 */
602int openin_tape(struct s_bkpinfo *bkpinfo)
603{
604    /*@ buffer ***************************************************** */
605    char fname[MAX_STR_LEN];
606    char *datablock = NULL;
607    char *tmp = NULL;
608    char old_cwd[MAX_STR_LEN];
609    char *outfname = NULL;
610    /*@ int ******************************************************* */
611    int i;
612    int j;
613    int res;
614    long length, templong;
615    size_t k;
616    int retval = 0;
617    int ctrl_chr;
618
619    /*@ long long ************************************************* */
620    long long size;
621
622    /*@ pointers ************************************************** */
623    FILE *fout;
624
625    /*@ end vars *************************************************** */
626
627    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
628    tapecatalog = mr_list_alloc();
629    g_tape_posK = 0;
630    if (g_tape_stream) {
631        log_it("FYI - I won't 'openin' the tape. It's already open.");
632        return (0);
633    }
634    insist_on_this_tape_number(1);
635    mr_asprintf(&outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
636    make_hole_for_file(outfname);
637
638    set_tape_block_size_with_mt(bkpinfo->media_device,
639                                bkpinfo->internal_tape_block_size);
640
641    log_it("Opening IN tape");
642    if (!
643        (g_tape_stream =
644         open_device_via_buffer(bkpinfo->media_device, 'r',
645                                bkpinfo->internal_tape_block_size))) {
646        log_to_screen(_("Cannot openin stream device"));
647        return (1);
648    }
649    log_to_screen(_("Reading stream"));
650    log_it("stream device = '%s'", bkpinfo->media_device);
651    /* skip data disks */
652    open_evalcall_form("Skipping data disks on stream");
653    log_to_screen(_("Skipping data disks on stream"));
654    if (!(fout = fopen(outfname, "w"))) {
655        log_OS_error(outfname);
656        log_to_screen(_("Cannot openout datadisk all.tar.gz file"));
657        return (-1);
658    }
659    datablock = (char *) mr_malloc(256 * 1024);
660    for (i = 0; i < 32; i++) {
661        for (j = 0; j < 4; j++) {
662            for (length = 0, k = 0; length < 256 * 1024; length += k) {
663                k = fread(datablock + length, 1, 256 * 1024 - length,
664                          g_tape_stream);
665            }
666            (void) fwrite(datablock, 1, (size_t) length, fout);
667            g_tape_posK += length / 1024;
668        }
669        if (i > 8)              // otherwise, 'buffer' distorts calculations
670        {
671            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
672            update_evalcall_form((int) (templong));
673        }
674    }
675    paranoid_fclose(fout);
676    mr_free(datablock);
677    /* find initial blocks */
678    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
679    retval += res;
680    if (ctrl_chr != BLK_START_OF_TAPE) {
681        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
682    }
683    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
684    retval += res;
685    if (ctrl_chr != BLK_START_OF_BACKUP) {
686        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
687    }
688    close_evalcall_form();
689    log_it("Saved all.tar.gz to '%s'", outfname);
690    (void) getcwd(old_cwd, MAX_STR_LEN);
691    chdir(bkpinfo->tmpdir);
692    mr_asprintf(&tmp, "tar -zxf %s tmp/mondo-restore.cfg 2> /dev/null",
693             outfname);
694    paranoid_system(tmp);
695    mr_free(tmp);
696    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
697    chdir(old_cwd);
698    unlink(outfname);
699    mr_free(outfname);
700    return (retval);
701}
702
703
704/**
705 * Start writing to a CD stream.
706 * @param cddev The CD device to openout via cdrecord.
707 * @param speed The speed to write at.
708 * @return 0 for success, nonzero for failure.
709 * @note This should be called only from backup processes.
710 */
711int openout_cdstream(char *cddev, int speed)
712{
713    /*@ buffers ***************************************************** */
714    char *command = NULL;
715
716    /*@ end vars *************************************************** */
717
718    /*  add 'dummy' if testing */
719    mr_asprintf(&command,
720             "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
721             cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
722    /*  initialise the catalog */
723    g_current_media_number = 1;
724    tapecatalog = mr_list_alloc();
725    /* log stuff */
726    log_it("Opening OUT cdstream with the command");
727    log_it(command);
728    /*  log_it("Let's see what happens, shall we?"); */
729    g_tape_stream = popen(command, "w");
730    mr_free(command);
731    if (g_tape_stream) {
732        return (0);
733    } else {
734        log_to_screen(_("Failed to openout to cdstream (fifo)"));
735        return (1);
736    }
737}
738
739
740/**
741 * Start writing to a tape device for the backup.
742 * @param tapedev The tape device to open for writing.
743 * @return 0 for success, nonzero for failure.
744 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
745 * EXISTING DATA on the tape!
746 */
747int openout_tape(char *tapedev, long internal_tape_block_size)
748{
749    g_current_media_number = 1;
750    if (g_tape_stream) {
751        log_it("FYI - I won't 'openout' the tape. It's already open.");
752        return (0);
753    }
754    tapecatalog = mr_list_alloc();
755    g_tape_posK = 0;
756
757    set_tape_block_size_with_mt(tapedev, internal_tape_block_size);
758    log_it("Opening OUT tape");
759    if (!
760        (g_tape_stream =
761         open_device_via_buffer(tapedev, 'w', internal_tape_block_size))) {
762        log_to_screen(_("Cannot openin stream device"));
763        return (1);
764    }
765    return (0);
766}
767
768
769/**
770 * Copy a file from the opened stream (CD or tape) to @p outfile.
771 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
772 * @param outfile The file to write to.
773 * @param size The size of the file in the input stream.
774 * @return 0 for success, nonzero for failure.
775 */
776int
777read_file_from_stream_to_file(struct s_bkpinfo *bkpinfo, char *outfile,
778                              long long size)
779{
780
781    /*@ int ******************************************************** */
782    int res;
783
784    /*@ end vars *************************************************** */
785
786    res = read_file_from_stream_FULL(bkpinfo, outfile, NULL, size);
787
788    return (res);
789}
790
791
792/**
793 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
794 * by @p fout.
795 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
796 * @param fout The stream to write the file to.
797 * @param size The size of the file in bytes.
798 * @return 0 for success, nonzero for failure.
799 */
800int
801read_file_from_stream_to_stream(struct s_bkpinfo *bkpinfo, FILE * fout,
802                                long long size)
803{
804
805    /*@ int ******************************************************** */
806    int res;
807
808    /*@ end vars *************************************************** */
809
810    res = read_file_from_stream_FULL(bkpinfo, NULL, fout, size);
811    return (res);
812}
813
814
815/**
816 * Copy a file from the currently opened stream (CD or tape) to either a
817 * @c FILE pointer indicating a currently-opened file, or a filename indicating
818 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
819 * and read_file_from_stream_to_stream() are wrappers for.
820 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
821 * @param outfname If non-NULL, write to this file.
822 * @param foutstream If non-NULL, write to this stream.
823 * @param orig_size The original length of the file in bytes.
824 * @return 0 for success, nonzero for failure.
825 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
826 */
827int
828read_file_from_stream_FULL(struct s_bkpinfo *bkpinfo, char *outfname,
829                           FILE * foutstream, long long orig_size)
830{
831    /*@ buffers ***************************************************** */
832    char *tmp = NULL;
833    char *datablock = NULL;
834    char *temp_fname;
835    char *temp_cksum;
836    char *actual_cksum = NULL;
837
838    /*@ int ********************************************************* */
839    int retval = 0;
840#ifdef EXTRA_TAPE_CHECKSUMS
841    int i, ch;
842#endif
843    int noof_blocks;
844    int ctrl_chr;
845    int res;
846    /*@ pointers **************************************************** */
847    FILE *fout;
848
849    /*@ long    ***************************************************** */
850    long bytes_to_write = 0;
851
852    /*@ long long *************************************************** */
853    long long temp_size, size;
854    long bytes_read, bytes_to_read;
855    long long total_read_from_tape_for_this_file = 0;
856    long long where_I_was_before_tape_change = 0;
857    /*@ unsigned int ************************************************ */
858    unsigned int crc16;
859    unsigned int crctt;
860
861    bool had_to_resync = FALSE;
862
863    /*@ init  ******************************************************* */
864    malloc_string(temp_fname);
865    malloc_string(temp_cksum);
866    datablock = mr_malloc(TAPE_BLOCK_SIZE);
867    crc16 = 0;
868    crctt = 0;
869    size = orig_size;
870
871    /*@ end vars *************************************************** */
872
873    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
874    if (orig_size != temp_size && orig_size != -1) {
875        mr_asprintf(&tmp,
876                 "output file's size should be %ld K but is apparently %ld K",
877                 (long) size >> 10, (long) temp_size >> 10);
878        log_to_screen(tmp);
879        mr_free(tmp);
880    }
881    if (ctrl_chr != BLK_START_FILE) {
882        wrong_marker(BLK_START_FILE, ctrl_chr);
883        return (1);
884    }
885    mr_asprintf(&tmp, "Reading file from tape; writing to '%s'; %ld KB",
886             outfname, (long) size >> 10);
887    log_to_screen(tmp);
888    mr_free(tmp);
889
890    if (foutstream) {
891        fout = foutstream;
892    } else {
893        fout = fopen(outfname, "w");
894    }
895    if (!fout) {
896        log_OS_error(outfname);
897        log_to_screen(_("Cannot openout file"));
898        return (1);
899    }
900    total_read_from_tape_for_this_file = 0;
901    for (noof_blocks = 0; size > 0;
902         noof_blocks++, size -=
903         bytes_to_write, total_read_from_tape_for_this_file +=
904         bytes_read) {
905        bytes_to_write =
906            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
907        bytes_to_read = TAPE_BLOCK_SIZE;
908        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
909        while (bytes_read < bytes_to_read) {    // next tape!
910//    crctt=crc16=0;
911            where_I_was_before_tape_change = size;
912            mr_msg(4, "where_I_was_... = %lld",
913                    where_I_was_before_tape_change);
914            start_to_read_from_next_tape(bkpinfo);
915            mr_msg(4, "Started reading from next tape.");
916            skip_incoming_files_until_we_find_this_one(temp_fname);
917            mr_msg(4, "Skipped irrelevant files OK.");
918            for (size = orig_size; size > where_I_was_before_tape_change;
919                 size -= bytes_to_write) {
920                bytes_read =
921                    fread(datablock, 1, bytes_to_read, g_tape_stream);
922            }
923            mr_msg(4, "'size' is now %lld (should be %lld)", size,
924                    where_I_was_before_tape_change);
925            log_to_screen("Successfully re-sync'd tape");
926            had_to_resync = TRUE;
927            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
928        }
929
930        (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
931
932#ifdef EXTRA_TAPE_CHECKSUMS
933        for (i = 0; i < (int) bytes_to_write; i++) {
934            ch = datablock[i];
935            crc16 = updcrcr(crc16, (unsigned) ch);
936            crctt = updcrc(crctt, (unsigned) ch);
937        }
938#endif
939    }
940    mr_msg(6, "Total read from tape for this file = %lld",
941            total_read_from_tape_for_this_file);
942    mr_msg(6, ".......................... Should be %lld", orig_size);
943    g_tape_posK += total_read_from_tape_for_this_file / 1024;
944    mr_asprintf(&actual_cksum, "%04x%04x", crc16, crctt);
945    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
946    } else {
947        paranoid_fclose(fout);
948    }
949    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
950    if (ctrl_chr != BLK_STOP_FILE) {
951        wrong_marker(BLK_STOP_FILE, ctrl_chr);
952//      fatal_error("Bad marker"); // return(1);
953    }
954    if (strcmp(temp_cksum, actual_cksum)) {
955        mr_asprintf(&tmp, _("actual cksum=%s; recorded cksum=%s"), actual_cksum,
956                 temp_cksum);
957        log_to_screen(tmp);
958        mr_free(tmp);
959
960        mr_asprintf(&tmp, _("%s (%ld K) is corrupt on tape"), temp_fname,
961                 (long) orig_size >> 10);
962        log_to_screen(tmp);
963        mr_free(tmp);
964        retval++;
965    }
966    mr_free(actual_cksum);
967    mr_free(datablock);
968    mr_free(temp_fname);
969    mr_free(temp_cksum);
970    return (retval);
971}
972
973
974/**
975 * Read a header block from the currently opened stream (CD or tape).
976 * This block indicates the length of the following file (if it's file-related)
977 * the filename (if it's file-related), and the block type.
978 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
979 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
980 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
981 * @return 0 for success, nonzero for failure.
982 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
983 */
984int
985read_header_block_from_stream(long long *plen, char *filename,
986                              int *pcontrol_char)
987{
988
989    /*@ buffers ***************************************************** */
990    char *tempblock;
991
992    /*@ int ********************************************************* */
993    int i, retval;
994
995    /*@ end vars *************************************************** */
996
997    tempblock = (char *) mr_malloc((size_t) TAPE_BLOCK_SIZE);
998
999    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1000        tempblock[i] = 0;
1001    }
1002    while (!(*pcontrol_char = tempblock[7000])) {
1003        g_tape_posK +=
1004            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1005                  g_tape_stream) / 1024;
1006    }
1007    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1008    if (strcmp(tempblock + 6000 + *pcontrol_char, "Mondolicious, baby")) {
1009        log_it("Bad header block at %ld K", (long) g_tape_posK);
1010    }
1011    strcpy(filename, tempblock + 1000);
1012    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1013        log_to_screen("I can't verify an aborted backup.");
1014        retval = 1;
1015    } else {
1016        retval = 0;
1017    }
1018    for (i = 1000; i < 1020; i++) {
1019        if (tempblock[i] < 32 || tempblock[i] > 126) {
1020            tempblock[i] = ' ';
1021        }
1022    }
1023    tempblock[i] = '\0';
1024    mr_msg(6, "%s (fname=%s, size=%ld K)",
1025            marker_to_string(*pcontrol_char), tempblock + 1000,
1026            (long) (*plen) >> 10);
1027    mr_free(tempblock);
1028    return (retval);
1029}
1030
1031
1032/**
1033 * Add specified file/slice to the internal catalog of all archives written.
1034 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1035 * write the last [buffer size] MB from the catalog to the new tape, so we know
1036 * we have @e all archives on some CD/tape/whatever.
1037 * @param type The type of file we're cataloging (afioball, slice, something else)
1038 * @param number The fileset number or biggiefile number.
1039 * @param aux The slice number if it's a biggiefile, or any other additional info.
1040 * @param fn The original full pathname of the file we're recording.
1041 * @return The index of the record we just added.
1042 */
1043int register_in_tape_catalog(t_archtype type, int number, long aux,
1044                             char *fn)
1045{
1046    char *fname = NULL;
1047    char *p = NULL;
1048    struct s_tapecat_entry *te = NULL;
1049    struct mr_list_elt *elt = NULL;
1050
1051    p = strrchr(fn, '/');
1052    if (p) {
1053        p++;
1054    } else {
1055        p = fn;
1056    }
1057    mr_asprintf(&fname, p);
1058
1059    te = (struct s_tapecat_entry *)mr_malloc(sizeof(struct s_tapecat_entry));
1060    te->type = type;
1061    te->number = number;
1062    te->aux = aux;
1063    te->tape_posK = g_tape_posK;
1064    /* BERLIOS: Check if this is written womewhere, as it's only a pointer */
1065    /* BERLIOS: Verify to purge fname correctly */
1066    te->fname = fname;
1067
1068    /* place the data in a list elt */
1069    elt = mr_list_alloc_elt((void *)te, mr_free_te);
1070    mr_list_add_elt_last(tapecatalog, elt);
1071
1072    // returns the index of the record we've just added
1073    return (mr_list_length(tapecatalog));
1074}
1075
1076
1077/**
1078 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1079 * (got SIGPIPE) or look like we will.
1080 * @param mediasize The size of the tape in megabytes.
1081 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1082 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1083 * autodetecting the size. Huh?
1084 */
1085
1086/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1087bool
1088should_we_write_to_next_tape(long mediasize,
1089                             off_t length_of_incoming_file)
1090{
1091    /*@ bool's ***************************************************** */
1092    bool we_need_a_new_tape = FALSE;
1093
1094    /*@ end vars *************************************************** */
1095
1096    if (mediasize == 0) {
1097        return (FALSE);
1098    }
1099    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1100        log_it("mediasize = %ld", mediasize);
1101        we_need_a_new_tape = TRUE;
1102        log_to_screen(_("Should have started a new tape/CD already"));
1103    }
1104    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1105        mediasize - (SLICE_SIZE * 4 / 1024)) {
1106        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1107               mediasize);
1108        we_need_a_new_tape = TRUE;
1109    }
1110    return (we_need_a_new_tape);
1111}
1112
1113
1114/**
1115 * Seek through the stream until we find a header block where the NAME field matches
1116 * @p the_file_I_was_reading. This is useful if you've just started reading from
1117 * a new tape and want to find the file you were reading when the tape ended.
1118 * @param the_file_I_was_reading File name to look for.
1119 * @return 0 for success, nonzero for failure.
1120 */
1121int skip_incoming_files_until_we_find_this_one(char
1122                                               *the_file_I_was_reading)
1123{
1124    char *pA;
1125    char *pB;
1126    int res;
1127    int ctrl_chr;
1128    char *temp_fname;
1129    char *datablock;
1130    long long temp_size, size;
1131    long bytes_to_write;
1132
1133    datablock = mr_malloc(TAPE_BLOCK_SIZE);
1134    malloc_string(temp_fname);
1135    pB = strrchr(the_file_I_was_reading, '/');
1136    if (pB) {
1137        pB++;
1138    } else {
1139        pB = the_file_I_was_reading;
1140    }
1141    mr_msg(1, "skip_incoming_..(%s)", pB);
1142    mr_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1143    ctrl_chr = -1;
1144    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1145        res =
1146            read_header_block_from_stream(&temp_size, temp_fname,
1147                                          &ctrl_chr);
1148        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1149            break;
1150        }
1151        mr_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1152        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1153        mr_msg(3, "Still trying to re-sync w/ tape");
1154    }
1155    while (ctrl_chr != BLK_START_FILE) {
1156        res =
1157            read_header_block_from_stream(&temp_size, temp_fname,
1158                                          &ctrl_chr);
1159        if (ctrl_chr == BLK_START_FILE) {
1160            break;
1161        }
1162        mr_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1163        wrong_marker(BLK_START_FILE, ctrl_chr);
1164        mr_msg(3, "Still trying to re-sync w/ tape");
1165    }
1166    pA = strrchr(temp_fname, '/');
1167    if (pA) {
1168        pA++;
1169    } else {
1170        pA = temp_fname;
1171    }
1172    pB = strrchr(the_file_I_was_reading, '/');
1173    if (pB) {
1174        pB++;
1175    } else {
1176        pB = the_file_I_was_reading;
1177    }
1178    while (strcmp(pA, pB)) {
1179        mr_msg(6, "Skipping %s (it's not %s)", temp_fname,
1180                the_file_I_was_reading);
1181        for (size = temp_size; size > 0; size -= bytes_to_write) {
1182            bytes_to_write =
1183                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1184            // FIXME - needs error-checking and -catching
1185            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1186        }
1187        res =
1188            read_header_block_from_stream(&temp_size, temp_fname,
1189                                          &ctrl_chr);
1190        if (ctrl_chr != BLK_STOP_FILE) {
1191            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1192        }
1193        res =
1194            read_header_block_from_stream(&temp_size, temp_fname,
1195                                          &ctrl_chr);
1196        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1197            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1198        }
1199        res =
1200            read_header_block_from_stream(&temp_size, temp_fname,
1201                                          &ctrl_chr);
1202        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1203            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1204        }
1205        res =
1206            read_header_block_from_stream(&temp_size, temp_fname,
1207                                          &ctrl_chr);
1208        if (ctrl_chr != BLK_START_FILE) {
1209            wrong_marker(BLK_START_FILE, ctrl_chr);
1210        }
1211        pA = strrchr(temp_fname, '/');
1212        if (pA) {
1213            pA++;
1214        } else {
1215            pA = temp_fname;
1216        }
1217        pB = strrchr(the_file_I_was_reading, '/');
1218        if (pB) {
1219            pB++;
1220        } else {
1221            pB = the_file_I_was_reading;
1222        }
1223    }
1224    mr_msg(2, "Reading %s (it matches %s)", temp_fname,
1225            the_file_I_was_reading);
1226    mr_free(temp_fname);
1227    mr_free(datablock);
1228    return (0);
1229}
1230
1231
1232/**
1233 * Start to read from the next tape. Assumes the user has already inserted it.
1234 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1235 * @return 0 for success, nonzero for failure.
1236 */
1237int start_to_read_from_next_tape(struct s_bkpinfo *bkpinfo)
1238{
1239    /*@ int ********************************************************* */
1240    int res = 0;
1241    char *sz_msg;
1242    int ctrlchr;
1243    long long temp_size;
1244    malloc_string(sz_msg);
1245    /*@ end vars *************************************************** */
1246
1247    paranoid_pclose(g_tape_stream);
1248    sync();
1249    sync();
1250    sync();
1251    log_it("Next tape requested.");
1252    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1253    log_it("Opening IN the next tape");
1254    if (!
1255        (g_tape_stream =
1256         open_device_via_buffer(bkpinfo->media_device, 'r',
1257                                bkpinfo->internal_tape_block_size))) {
1258        log_to_screen(_("Cannot openin stream device"));
1259        return (1);
1260    }
1261    g_tape_posK = 0;
1262    g_sigpipe = FALSE;
1263    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1264    if (ctrlchr != BLK_START_OF_TAPE) {
1265        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1266    }
1267    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1268    if (ctrlchr != BLK_START_OF_BACKUP) {
1269        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1270    } else {
1271        mr_msg(3, "Next tape opened OK. Whoopee!");
1272    }
1273    mr_free(sz_msg);
1274    return (res);
1275}
1276
1277
1278/**
1279 * Start to write to the next tape. Assume the user has already inserted it.
1280 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1281 * @return 0 for success, nonzero for failure.
1282 */
1283int start_to_write_to_next_tape(struct s_bkpinfo *bkpinfo)
1284{
1285    int res = 0;
1286    char *command = NULL;
1287
1288    paranoid_pclose(g_tape_stream);
1289    sync();
1290    sync();
1291    sync();
1292    log_it("New tape requested.");
1293    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1294    if (bkpinfo->backup_media_type == cdstream) {
1295        mr_asprintf(&command,
1296                 "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1297                 bkpinfo->iso_burning_dev, bkpinfo->writer_speed, MONDO_LOGFILE,
1298                 MONDO_LOGFILE);
1299        log_it("Opening OUT to next CD with the command");
1300        log_it(command);
1301        log_it("Let's see what happens, shall we?");
1302        g_tape_stream = popen(command, "w");
1303        mr_free(command);
1304        if (!g_tape_stream) {
1305            log_to_screen(_("Failed to openout to cdstream (fifo)"));
1306            return (1);
1307        }
1308    } else {
1309        log_it("Opening OUT to next tape");
1310        if (!
1311            (g_tape_stream =
1312             open_device_via_buffer(bkpinfo->media_device, 'w',
1313                                    bkpinfo->internal_tape_block_size))) {
1314            log_to_screen(_("Cannot openin stream device"));
1315            return (1);
1316        }
1317    }
1318    g_tape_posK = 0;
1319    g_sigpipe = FALSE;
1320    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1321    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1322    return (res);
1323}
1324
1325
1326/**
1327 * Write a bufferfull of the most recent archives to the tape. The
1328 * rationale behind this is a bit complex. If the previous tape ended
1329 * suddenly (EOF or otherwise) some archives were probably left in the
1330 * buffer. That means that Mondo thinks they have been written, but
1331 * the external binary @c buffer has not actually written them. So to
1332 * be safe, we start the new tape by writing the last bufferfull from
1333 * the old one. This insures that all archives will be on at least
1334 * one tape. Sounds inelegant, but it works.
1335 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1336 * @return 0 for success, nonzero for failure.
1337 */
1338int write_backcatalog_to_tape(struct s_bkpinfo *bkpinfo)
1339{
1340    int res = 0;
1341    char *fname = NULL;
1342    struct mr_list_elt *elt = NULL;
1343    struct s_tapecat_entry *te = NULL;
1344
1345    mr_msg(2, "I am now writing back catalog to tape");
1346    elt = tapecatalog->first;
1347    while (elt != NULL) {
1348        te = (struct s_tapecat_entry *) elt->data;
1349        mr_asprintf(&fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir, te->fname);
1350        if (!does_file_exist(fname)) {
1351            mr_msg(6, "Can't write %s - it doesn't exist.", fname);
1352        } else {
1353            write_header_block_to_stream(length_of_file(fname),
1354                                         "start-backcatalog-afio-or-slice",
1355                                         BLK_START_AN_AFIO_OR_SLICE);
1356            mr_msg(2, "Writing %s", fname);
1357            if (write_file_to_stream_from_file(bkpinfo, fname)) {
1358                res++;
1359                mr_msg(2, "%s failed", fname);
1360            }
1361            if (elt != tapecatalog->last) {
1362                write_header_block_to_stream((off_t)0,
1363                                             "stop-backcatalog-afio-or-slice",
1364                                             BLK_STOP_AN_AFIO_OR_SLICE);
1365            }
1366        }
1367        mr_free(fname);
1368        elt = elt->next;
1369    }
1370    mr_msg(2, "Finished writing back catalog to tape");
1371    return (res);
1372}
1373
1374
1375/**
1376 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1377 * @param fname The path to all.tar.gz.
1378 * @return 0 for success, nonzero for failure.
1379 */
1380int write_data_disks_to_stream(char *fname)
1381{
1382    /*@ pointers *************************************************** */
1383    FILE *fin = NULL;
1384    char *tmp = NULL;
1385
1386    /*@ long ******************************************************* */
1387    long m = -1;
1388    long templong;
1389
1390    /*@ int ******************************************************** */
1391    int i, j;
1392
1393    /*@ buffers **************************************************** */
1394    char tempblock[256 * 1024];
1395
1396    /*@ end vars *************************************************** */
1397
1398    open_evalcall_form(_("Writing data disks to tape"));
1399    log_to_screen(_("Writing data disks to tape"));
1400    log_it("Data disks = %s", fname);
1401    if (!does_file_exist(fname)) {
1402        mr_asprintf(&tmp, _("Cannot find %s"), fname);
1403        log_to_screen(tmp);
1404        mr_free(tmp);
1405        return (1);
1406    }
1407    if (!(fin = fopen(fname, "r"))) {
1408        log_OS_error(fname);
1409        fatal_error("Cannot openin the data disk");
1410    }
1411    for (i = 0; i < 32; i++) {  /* 32MB */
1412        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1413            if (!feof(fin)) {
1414                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1415            } else {
1416                m = 0;
1417            }
1418            for (; m < 256 * 1024; m++) {
1419                tempblock[m] = '\0';
1420            }
1421            g_tape_posK +=
1422                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1423        }
1424        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1425        {
1426            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1427            update_evalcall_form((int) (templong));
1428        }
1429    }
1430    paranoid_fclose(fin);
1431    close_evalcall_form();
1432    return (0);
1433}
1434
1435
1436/**
1437 * Copy @p infile to the opened stream (CD or tape).
1438 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1439 * @param infile The file to write to the stream.
1440 * @return 0 for success, nonzero for failure.
1441 */
1442int write_file_to_stream_from_file(struct s_bkpinfo *bkpinfo, char *infile)
1443{
1444    /*@ buffers **************************************************** */
1445    char *tmp = NULL;
1446    char datablock[TAPE_BLOCK_SIZE];
1447    char *checksum = NULL;
1448    char *infile_basename = NULL;
1449
1450    /*@ int ******************************************************** */
1451    int retval = 0;
1452    int noof_blocks;
1453
1454    /*  unsigned int ch; */
1455    unsigned int crc16;
1456    unsigned int crctt;
1457
1458    /*@ pointers *************************************************** */
1459    FILE *fin;
1460    char *p;
1461
1462    /*@ long ******************************************************* */
1463    long bytes_to_read = 0;
1464    long i;
1465
1466    off_t filesize;
1467
1468#ifdef EXTRA_TAPE_CHECKSUMS
1469    int ch;
1470#endif
1471
1472    /*@ initialize ************************************************ */
1473    crc16 = 0;
1474    crctt = 0;
1475
1476    /*@ end vars *************************************************** */
1477
1478    infile_basename = strrchr(infile, '/');
1479    if (infile_basename) {
1480        infile_basename++;
1481    } else {
1482        infile_basename = infile;
1483    }
1484    filesize = length_of_file(infile);
1485    if (should_we_write_to_next_tape
1486        (bkpinfo->media_size, filesize)) {
1487        start_to_write_to_next_tape(bkpinfo);
1488        write_backcatalog_to_tape(bkpinfo);
1489    }
1490    p = strrchr(infile, '/');
1491    if (!p) {
1492        p = infile;
1493    } else {
1494        p++;
1495    }
1496    mr_asprintf(&tmp, "Writing file '%s' to tape (%ld KB)", p,
1497             (long) filesize >> 10);
1498    log_it(tmp);
1499    mr_free(tmp);
1500
1501    write_header_block_to_stream(filesize, infile_basename,
1502                                 BLK_START_FILE);
1503//go_here_to_restart_saving_of_file:
1504    if (!(fin = fopen(infile, "r"))) {
1505        log_OS_error(infile);
1506        return (1);
1507    }
1508    for (noof_blocks = 0; filesize > 0;
1509         noof_blocks++, filesize -= bytes_to_read) {
1510        if (filesize < TAPE_BLOCK_SIZE) {
1511            bytes_to_read = (long) filesize;
1512            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1513                datablock[i] = '\0';
1514            }
1515        } else {
1516            bytes_to_read = TAPE_BLOCK_SIZE;
1517        }
1518        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1519        g_tape_posK += fwrite(datablock, 1, /*bytes_to_read */
1520                              (size_t) TAPE_BLOCK_SIZE,
1521                              g_tape_stream) / 1024;
1522        if (g_sigpipe) {
1523            iamhere("Sigpipe occurred recently. I'll start a new tape.");
1524            fclose(fin);
1525            g_sigpipe = FALSE;
1526            start_to_write_to_next_tape(bkpinfo);
1527            write_backcatalog_to_tape(bkpinfo); // kinda-sorta recursive :)
1528            return (0);
1529        }
1530#ifdef EXTRA_TAPE_CHECKSUMS
1531        for (i = 0; i < bytes_to_read; i++) {
1532            ch = datablock[i];
1533            crc16 = updcrcr(crc16, (unsigned) ch);
1534            crctt = updcrc(crctt, (unsigned) ch);
1535        }
1536#endif
1537    }
1538    paranoid_fclose(fin);
1539    mr_asprintf(&checksum, "%04x%04x", crc16, crctt);
1540    /* BERLIOS: what does it do ??? */
1541    write_header_block_to_stream((off_t)g_current_media_number, checksum,
1542                                 BLK_STOP_FILE);
1543    mr_free(checksum);
1544//  log_it("File '%s' written to tape.", infile);
1545    return (retval);
1546}
1547
1548
1549/**
1550 * Write a header block to the opened stream (CD or tape).
1551 * @param length_of_incoming_file The length to store in the header block.
1552 * Usually matters only if this is a file-related header, in which case it should
1553 * be the length of the file that will follow.
1554 * @param filename The filename to store in the header block. Usually matters
1555 * only if this is a file-related header, in which case this should be the name
1556 * if the file that will follow.
1557 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1558 * @return 0 for success, nonzero for failure.
1559 */
1560int
1561write_header_block_to_stream(off_t length_of_incoming_file,
1562                             char *filename, int control_char)
1563{
1564    /*@ buffers **************************************************** */
1565    char tempblock[TAPE_BLOCK_SIZE];
1566    char *p;
1567
1568    /*@ int ******************************************************** */
1569    int i;
1570
1571    off_t olen;
1572
1573    /*@ end vars *************************************************** */
1574
1575
1576    olen = length_of_incoming_file;
1577    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1578    if (!p) {
1579        p = filename;
1580    } else {
1581        p++;
1582    }
1583    if (!g_tape_stream) {
1584        log_to_screen
1585            (_("You're not backing up to tape. Why write a tape header?"));
1586        return (1);
1587    }
1588    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1589        tempblock[i] = 0;
1590    }
1591    sprintf(tempblock + 6000 + control_char, "Mondolicious, baby");
1592    tempblock[7000] = control_char;
1593    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1594    strcpy(tempblock + 1000, filename);
1595    g_tape_posK +=
1596        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1597               g_tape_stream) / 1024;
1598    mr_msg(6, "%s (fname=%s, size=%ld K)",
1599            marker_to_string(control_char), p,
1600            (long) length_of_incoming_file >> 10);
1601    return (0);
1602}
1603
1604
1605/**
1606 * Log (to screen) an erroneous marker, along with what it should have been.
1607 * @param should_be What we were expecting.
1608 * @param it_is What we got.
1609 */
1610void wrong_marker(int should_be, int it_is)
1611{
1612    /*@ buffer ***************************************************** */
1613    char *tmp = NULL;
1614
1615
1616    /*@ end vars *************************************************** */
1617    mr_asprintf(&tmp, _("Wrong marker! (Should be %s, is actually %s)"),
1618             marker_to_string(should_be), marker_to_string(it_is));
1619    log_to_screen(tmp);
1620    mr_free(tmp);
1621}
1622
1623/* @} - end of streamGroup */
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