source: branches/stable/mondo/src/common/libmondo-stream.c @ 1569

Last change on this file since 1569 was 1569, checked in by bruno, 12 years ago

Improvements on tape handling (based on patches from Michel Loiseleur <mloiseleur_at_linagora.com>)

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1/* $Id: libmondo-stream.c 1569 2007-07-25 23:18:38Z 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 1569 2007-07-25 23:18:38Z 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        log_it("Taking %s",VANILLA_SCSI_TAPE);
293        strcpy(dev, VANILLA_SCSI_TAPE);
294        return 1;
295    }
296    mr_asprintf(&command,
297            "%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",
298            cdr_exe);
299    strcpy(tmp, call_program_and_get_last_line_of_output(command));
300    mr_free(command);
301    if (strlen(tmp) < 2) {
302        log_it("Could not check tape device with %s",cdr_exe);
303        return 1;
304    }
305    mr_asprintf(&command,
306            "%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",
307            cdr_exe);
308    strcpy(tmp, call_program_and_get_last_line_of_output(command));
309    mr_free(command);
310
311    strcpy(dev, VANILLA_SCSI_TAPE);
312    dev[strlen(dev) - 1] = '\0';
313    strcat(dev, tmp);           // e.g. '/dev/st0' becomes '/dev/stN'
314    res = 0;
315    if (!mt_says_tape_exists(dev)) {
316        strcpy(dev, ALT_TAPE);
317        if (!mt_says_tape_exists(dev)) {
318            log_it("Cannot openin %s", dev);
319            strcpy(dev, "/dev/osst0");
320            if (!mt_says_tape_exists(dev)) {
321                res++;
322            } else {
323                res = 0;
324            }
325        }
326    }
327
328    log_it("At this point, dev = %s and res = %d", dev, res);
329
330    strcpy(tmp, call_program_and_get_last_line_of_output("\
331cdrecord -scanbus 2> /dev/null | tr -s '\t' ' ' | \
332grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | \
333awk '{for(i=1; i<NF; i++) { if (index($i, \"GB\")>0) { print $i;};};};'"));
334
335    if (mt_says_tape_exists(dev)) {
336        res = 0;
337    } else {
338        log_it("Turning %s", dev);
339        strcpy(tmp, (strrchr(dev, '/') != NULL) ? strrchr(dev, '/') : dev);
340        sprintf(dev, "/dev/os%s", tmp);
341        log_it("...into %s", dev);
342        if (mt_says_tape_exists(dev)) {
343            res = 0;
344        } else {
345            res++;
346        }
347    }
348
349    siz[0] = '\0';
350    log_it("res=%d; dev=%s", res, dev);
351
352    if (res) {
353        return (res);
354    }
355
356    if (strlen(tmp) < 2) {
357        siz[0] = '\0';
358        log_it("Warning - size of tape unknown");
359        return (0);
360    } else {
361        strcpy(siz, tmp);
362        return (0);
363    }
364}
365
366
367int read_EXAT_files_from_tape(struct s_bkpinfo *bkpinfo,
368                              long long *ptmp_size, char *tmp_fname,
369                              int *pctrl_chr, char *xattr_fname,
370                              char *acl_fname)
371{
372    int res = 0;
373    int retval = 0;
374    char *fname = (char *)&res;                 /* Should NOT be NULL */
375
376// xattr
377    if (g_getfattr) {
378        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
379        if (*pctrl_chr != BLK_START_EXAT_FILE) {
380            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
381        }
382        if (!strstr(fname, "xattr")) {
383            fatal_error("Wrong order, sunshine.");
384        }
385        read_file_from_stream_to_file(bkpinfo, xattr_fname, *ptmp_size);
386        res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
387        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
388            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
389        }
390        mr_msg(1, "Got xattr");
391    }
392    // acl
393    if (g_getfacl) {
394        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
395        if (!strstr(fname, "acl")) {
396            fatal_error("Wrong order, sunshine.");
397        }
398        if (*pctrl_chr != BLK_START_EXAT_FILE) {
399            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
400        }
401        read_file_from_stream_to_file(bkpinfo, acl_fname, *ptmp_size);
402        res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
403        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
404            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
405        }
406        res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
407        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
408            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
409        }
410        mr_msg(1, "Got acl");
411    }
412    // tarball itself
413    res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
414    mr_msg(1, "now looking for afioball");
415    return (retval);
416}
417
418
419int write_EXAT_files_to_tape(struct s_bkpinfo *bkpinfo, char *xattr_fname,
420                             char *acl_fname)
421{
422    int res = 0;
423    if (g_getfattr) {
424    // xattr
425        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
426                             BLK_START_EXTENDED_ATTRIBUTES);
427        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
428                             BLK_START_EXAT_FILE);
429        write_file_to_stream_from_file(bkpinfo, xattr_fname);
430        write_header_block_to_stream((off_t)-1, xattr_fname, BLK_STOP_EXAT_FILE);
431    }
432    if (g_getfacl) {
433    // acl
434        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
435                             BLK_START_EXAT_FILE);
436        write_file_to_stream_from_file(bkpinfo, acl_fname);
437        write_header_block_to_stream((off_t)-1, acl_fname, BLK_STOP_EXAT_FILE);
438        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
439                             BLK_STOP_EXTENDED_ATTRIBUTES);
440    }
441    return (res);
442}
443
444
445
446
447/**
448 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
449 * @param tapeno The tape number to insist on.
450 * @bug There is currently no way to actually verify that the user has actually
451 * inserted the right tape.
452 */
453void insist_on_this_tape_number(int tapeno)
454{
455    int i;
456    char *tmp = NULL;
457
458    log_it("Insisting on tape #%d", tapeno);
459    if (g_current_media_number != tapeno) {
460        //      log_it("g_current_media_number = %d", g_current_media_number);
461        mr_asprintf(&tmp,
462                 _("When the tape drive goes quiet, please insert volume %d in this series."),
463                 tapeno);
464        popup_and_OK(tmp);
465        mr_free(tmp);
466        open_evalcall_form(_("Waiting while the tape drive settles"));
467    } else {
468        open_evalcall_form(_("Waiting while the tape drive rewinds"));
469    }
470
471    for (i = 0; i <= 100; i += 2) {
472        usleep(100000);
473        update_evalcall_form(i);
474    }
475    close_evalcall_form();
476    log_it("I assume user has inserted it. They _say_ they have...");
477    g_current_media_number = tapeno;
478
479    //  log_it("g_current_media_number = %d", g_current_media_number);
480    log_it("OK, I've finished insisting. On with the revelry.");
481}
482
483
484/**
485 * Debugging aid - log the offset we're at on the tape (reading or writing).
486 */
487void log_tape_pos(void)
488{
489    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
490           (long) g_tape_posK >> 10);
491}
492
493
494/**
495 * Add a file to a collection of recently archived filesets/slices.
496 * The type is determined by the filename: if it contains ".afio." it is
497 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
498 * otherwise we generate a fatal_error().
499 * @param td The current @c bkpinfo->tempdir (file will be placed in <tt>td</tt>/tmpfs/backcatalog/).
500 * @param latest_fname The file to place in the collection.
501 * @return 0, always.
502 * @bug Return value is redundant.
503 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
504 */
505int maintain_collection_of_recent_archives(char *td, char *latest_fname)
506{
507    long long final_alleged_writeK, final_projected_certain_writeK,
508        final_actually_certain_writeK = 0, cposK, bufsize_K;
509    int last = 0;
510    int i = 0;
511    t_archtype type = other;
512    char *command = NULL;
513    char *tmpdir = NULL;
514    char *old_fname = NULL;
515    struct mr_list_elt *elt = NULL;
516    struct s_tapecat_entry *te = NULL;
517
518    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
519    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
520        type = fileset;
521    } else if (strstr(latest_fname, "slice")) {
522        type = biggieslice;
523    } else {
524        log_it("fname = %s", latest_fname);
525        fatal_error
526            ("Unknown type. Internal error in maintain_collection_of_recent_archives()");
527    }
528
529    mr_asprintf(&tmpdir, "%s/tmpfs/backcatalog", td);
530    mkdir(tmpdir, 0x700);
531    mr_asprintf(&command, "cp -f %s %s", latest_fname, tmpdir);
532    if (run_program_and_log_output(command, 6)) {
533        log_it("Warning - failed to copy %s to backcatalog at %s",
534               latest_fname, tmpdir);
535    }
536    mr_free(command);
537
538    last = mr_list_length(tapecatalog) - 1;
539    if (last <= 0) {
540        iamhere("Too early to start deleting from collection.");
541        return (0);
542    }
543    elt = tapecatalog->last;
544    te = (struct s_tapecat_entry *)elt->data;
545    final_alleged_writeK = te->tape_posK;
546    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
547    while (elt != NULL) {
548        te = (struct s_tapecat_entry *)elt->data;
549        cposK = te->tape_posK;
550        if (cposK < final_projected_certain_writeK) {
551            final_actually_certain_writeK = cposK;
552            break;
553        }
554        elt = elt->prev;
555    }
556    if (elt == NULL) {
557        iamhere
558            ("Not far enough into tape to start deleting old archives from collection.");
559        return (0);
560    }
561
562    elt = elt->prev;
563    i = 0;
564    while ((elt != NULL) && (i < 10)) {
565        te = (struct s_tapecat_entry *)elt->data;
566        mr_asprintf(&old_fname, "%s/%s", tmpdir, te->fname);
567        unlink(old_fname);
568        mr_free(old_fname);
569        elt = elt->prev;
570        i++;
571    }
572    mr_free(tmpdir);
573    return (0);
574}
575
576
577/**
578 * Open the CD stream for input.
579 * @param bkpinfo The backup information structure. Passed to openin_tape().
580 * @return 0 for success, nonzero for failure.
581 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
582 */
583int openin_cdstream(struct s_bkpinfo *bkpinfo)
584{
585    return (openin_tape(bkpinfo));
586}
587
588
589int set_tape_block_size_with_mt(char *tapedev,
590                                long internal_tape_block_size)
591{
592    char *tmp;
593    int res;
594
595    if (strncmp(tapedev, "/dev/", 5)) {
596        mr_msg(1,
597                "Not using 'mt setblk'. This isn't an actual /dev entry.");
598        return (0);
599    }
600    mr_asprintf(&tmp, "mt -f %s setblk %ld", tapedev,
601             internal_tape_block_size);
602    res = run_program_and_log_output(tmp, 3);
603    mr_free(tmp);
604    return (res);
605}
606
607
608/**
609 * Open the tape device for input.
610 * @param bkpinfo The backup information structure. Fields used:
611 * - @c bkpinfo->media_device
612 * - @c bkpinfo->tmpdir
613 * @return 0 for success, nonzero for failure.
614 * @note This will also work with a cdstream for now, but don't count on this behavior.
615 */
616int openin_tape(struct s_bkpinfo *bkpinfo)
617{
618    /*@ buffer ***************************************************** */
619    char fname[MAX_STR_LEN];
620    char *datablock = NULL;
621    char *tmp = NULL;
622    char old_cwd[MAX_STR_LEN];
623    char *outfname = NULL;
624    /*@ int ******************************************************* */
625    int i;
626    int j;
627    int res;
628    long length, templong;
629    size_t k;
630    int retval = 0;
631    int ctrl_chr;
632
633    /*@ long long ************************************************* */
634    long long size;
635
636    /*@ pointers ************************************************** */
637    FILE *fout;
638
639    /*@ end vars *************************************************** */
640
641    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
642    tapecatalog = mr_list_alloc();
643    g_tape_posK = 0;
644    if (g_tape_stream) {
645        log_it("FYI - I won't 'openin' the tape. It's already open.");
646        return (0);
647    }
648    insist_on_this_tape_number(1);
649    mr_asprintf(&outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
650    make_hole_for_file(outfname);
651
652    set_tape_block_size_with_mt(bkpinfo->media_device,
653                                bkpinfo->internal_tape_block_size);
654
655    log_it("Opening IN tape");
656    if (!
657        (g_tape_stream =
658         open_device_via_buffer(bkpinfo->media_device, 'r',
659                                bkpinfo->internal_tape_block_size))) {
660        log_to_screen(_("Cannot openin stream device"));
661        return (1);
662    }
663    log_to_screen(_("Reading stream"));
664    log_it("stream device = '%s'", bkpinfo->media_device);
665    /* skip data disks */
666    open_evalcall_form("Skipping data disks on stream");
667    log_to_screen(_("Skipping data disks on stream"));
668    if (!(fout = fopen(outfname, "w"))) {
669        log_OS_error(outfname);
670        log_to_screen(_("Cannot openout datadisk all.tar.gz file"));
671        return (-1);
672    }
673    datablock = (char *) mr_malloc(256 * 1024);
674    for (i = 0; i < 32; i++) {
675        for (j = 0; j < 4; j++) {
676            for (length = 0, k = 0; length < 256 * 1024; length += k) {
677                k = fread(datablock + length, 1, 256 * 1024 - length,
678                          g_tape_stream);
679            }
680            (void) fwrite(datablock, 1, (size_t) length, fout);
681            g_tape_posK += length / 1024;
682        }
683        if (i > 8)              // otherwise, 'buffer' distorts calculations
684        {
685            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
686            update_evalcall_form((int) (templong));
687        }
688    }
689    paranoid_fclose(fout);
690    mr_free(datablock);
691    /* find initial blocks */
692    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
693    retval += res;
694    if (ctrl_chr != BLK_START_OF_TAPE) {
695        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
696    }
697    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
698    retval += res;
699    if (ctrl_chr != BLK_START_OF_BACKUP) {
700        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
701    }
702    close_evalcall_form();
703    log_it("Saved all.tar.gz to '%s'", outfname);
704    (void) getcwd(old_cwd, MAX_STR_LEN);
705    chdir(bkpinfo->tmpdir);
706    mr_asprintf(&tmp, "tar -zxf %s tmp/mondo-restore.cfg 2> /dev/null",
707             outfname);
708    paranoid_system(tmp);
709    mr_free(tmp);
710    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
711    chdir(old_cwd);
712    unlink(outfname);
713    mr_free(outfname);
714    return (retval);
715}
716
717
718/**
719 * Start writing to a CD stream.
720 * @param cddev The CD device to openout via cdrecord.
721 * @param speed The speed to write at.
722 * @return 0 for success, nonzero for failure.
723 * @note This should be called only from backup processes.
724 */
725int openout_cdstream(char *cddev, int speed)
726{
727    /*@ buffers ***************************************************** */
728    char *command = NULL;
729
730    /*@ end vars *************************************************** */
731
732    /*  add 'dummy' if testing */
733    mr_asprintf(&command,
734             "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
735             cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
736    /*  initialise the catalog */
737    g_current_media_number = 1;
738    tapecatalog = mr_list_alloc();
739    /* log stuff */
740    log_it("Opening OUT cdstream with the command");
741    log_it(command);
742    /*  log_it("Let's see what happens, shall we?"); */
743    g_tape_stream = popen(command, "w");
744    mr_free(command);
745    if (g_tape_stream) {
746        return (0);
747    } else {
748        log_to_screen(_("Failed to openout to cdstream (fifo)"));
749        return (1);
750    }
751}
752
753
754/**
755 * Start writing to a tape device for the backup.
756 * @param tapedev The tape device to open for writing.
757 * @return 0 for success, nonzero for failure.
758 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
759 * EXISTING DATA on the tape!
760 */
761int openout_tape(char *tapedev, long internal_tape_block_size)
762{
763    g_current_media_number = 1;
764    if (g_tape_stream) {
765        log_it("FYI - I won't 'openout' the tape. It's already open.");
766        return (0);
767    }
768    tapecatalog = mr_list_alloc();
769    g_tape_posK = 0;
770
771    set_tape_block_size_with_mt(tapedev, internal_tape_block_size);
772    log_it("Opening OUT tape");
773    if (!
774        (g_tape_stream =
775         open_device_via_buffer(tapedev, 'w', internal_tape_block_size))) {
776        log_to_screen(_("Cannot openin stream device"));
777        return (1);
778    }
779    return (0);
780}
781
782
783/**
784 * Copy a file from the opened stream (CD or tape) to @p outfile.
785 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
786 * @param outfile The file to write to.
787 * @param size The size of the file in the input stream.
788 * @return 0 for success, nonzero for failure.
789 */
790int
791read_file_from_stream_to_file(struct s_bkpinfo *bkpinfo, char *outfile,
792                              long long size)
793{
794
795    /*@ int ******************************************************** */
796    int res;
797
798    /*@ end vars *************************************************** */
799
800    res = read_file_from_stream_FULL(bkpinfo, outfile, NULL, size);
801
802    return (res);
803}
804
805
806/**
807 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
808 * by @p fout.
809 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
810 * @param fout The stream to write the file to.
811 * @param size The size of the file in bytes.
812 * @return 0 for success, nonzero for failure.
813 */
814int
815read_file_from_stream_to_stream(struct s_bkpinfo *bkpinfo, FILE * fout,
816                                long long size)
817{
818
819    /*@ int ******************************************************** */
820    int res;
821
822    /*@ end vars *************************************************** */
823
824    res = read_file_from_stream_FULL(bkpinfo, NULL, fout, size);
825    return (res);
826}
827
828
829/**
830 * Copy a file from the currently opened stream (CD or tape) to either a
831 * @c FILE pointer indicating a currently-opened file, or a filename indicating
832 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
833 * and read_file_from_stream_to_stream() are wrappers for.
834 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
835 * @param outfname If non-NULL, write to this file.
836 * @param foutstream If non-NULL, write to this stream.
837 * @param orig_size The original length of the file in bytes.
838 * @return 0 for success, nonzero for failure.
839 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
840 */
841int
842read_file_from_stream_FULL(struct s_bkpinfo *bkpinfo, char *outfname,
843                           FILE * foutstream, long long orig_size)
844{
845    /*@ buffers ***************************************************** */
846    char *tmp = NULL;
847    char *datablock = NULL;
848    char *temp_fname;
849    char *temp_cksum;
850    char *actual_cksum = NULL;
851
852    /*@ int ********************************************************* */
853    int retval = 0;
854#ifdef EXTRA_TAPE_CHECKSUMS
855    int i, ch;
856#endif
857    int noof_blocks;
858    int ctrl_chr;
859    int res;
860    /*@ pointers **************************************************** */
861    FILE *fout;
862
863    /*@ long    ***************************************************** */
864    long bytes_to_write = 0;
865
866    /*@ long long *************************************************** */
867    long long temp_size, size;
868    long bytes_read, bytes_to_read;
869    long long total_read_from_tape_for_this_file = 0;
870    long long where_I_was_before_tape_change = 0;
871    /*@ unsigned int ************************************************ */
872    unsigned int crc16;
873    unsigned int crctt;
874
875    bool had_to_resync = FALSE;
876
877    /*@ init  ******************************************************* */
878    malloc_string(temp_fname);
879    malloc_string(temp_cksum);
880    datablock = mr_malloc(TAPE_BLOCK_SIZE);
881    crc16 = 0;
882    crctt = 0;
883    size = orig_size;
884
885    /*@ end vars *************************************************** */
886
887    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
888    if (orig_size != temp_size && orig_size != -1) {
889        mr_asprintf(&tmp,
890                 "output file's size should be %ld K but is apparently %ld K",
891                 (long) size >> 10, (long) temp_size >> 10);
892        log_to_screen(tmp);
893        mr_free(tmp);
894    }
895    if (ctrl_chr != BLK_START_FILE) {
896        wrong_marker(BLK_START_FILE, ctrl_chr);
897        return (1);
898    }
899    mr_asprintf(&tmp, "Reading file from tape; writing to '%s'; %ld KB",
900             outfname, (long) size >> 10);
901    log_to_screen(tmp);
902    mr_free(tmp);
903
904    if (foutstream) {
905        fout = foutstream;
906    } else {
907        fout = fopen(outfname, "w");
908    }
909    if (!fout) {
910        log_OS_error(outfname);
911        log_to_screen(_("Cannot openout file"));
912        return (1);
913    }
914    total_read_from_tape_for_this_file = 0;
915    for (noof_blocks = 0; size > 0;
916         noof_blocks++, size -=
917         bytes_to_write, total_read_from_tape_for_this_file +=
918         bytes_read) {
919        bytes_to_write =
920            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
921        bytes_to_read = TAPE_BLOCK_SIZE;
922        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
923        while (bytes_read < bytes_to_read) {    // next tape!
924//    crctt=crc16=0;
925            where_I_was_before_tape_change = size;
926            mr_msg(4, "where_I_was_... = %lld",
927                    where_I_was_before_tape_change);
928            start_to_read_from_next_tape(bkpinfo);
929            mr_msg(4, "Started reading from next tape.");
930            skip_incoming_files_until_we_find_this_one(temp_fname);
931            mr_msg(4, "Skipped irrelevant files OK.");
932            for (size = orig_size; size > where_I_was_before_tape_change;
933                 size -= bytes_to_write) {
934                bytes_read =
935                    fread(datablock, 1, bytes_to_read, g_tape_stream);
936            }
937            mr_msg(4, "'size' is now %lld (should be %lld)", size,
938                    where_I_was_before_tape_change);
939            log_to_screen("Successfully re-sync'd tape");
940            had_to_resync = TRUE;
941            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
942        }
943
944        (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
945
946#ifdef EXTRA_TAPE_CHECKSUMS
947        for (i = 0; i < (int) bytes_to_write; i++) {
948            ch = datablock[i];
949            crc16 = updcrcr(crc16, (unsigned) ch);
950            crctt = updcrc(crctt, (unsigned) ch);
951        }
952#endif
953    }
954    mr_msg(6, "Total read from tape for this file = %lld",
955            total_read_from_tape_for_this_file);
956    mr_msg(6, ".......................... Should be %lld", orig_size);
957    g_tape_posK += total_read_from_tape_for_this_file / 1024;
958    mr_asprintf(&actual_cksum, "%04x%04x", crc16, crctt);
959    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
960    } else {
961        paranoid_fclose(fout);
962    }
963    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
964    if (ctrl_chr != BLK_STOP_FILE) {
965        wrong_marker(BLK_STOP_FILE, ctrl_chr);
966//      fatal_error("Bad marker"); // return(1);
967    }
968    if (strcmp(temp_cksum, actual_cksum)) {
969        mr_asprintf(&tmp, _("actual cksum=%s; recorded cksum=%s"), actual_cksum,
970                 temp_cksum);
971        log_to_screen(tmp);
972        mr_free(tmp);
973
974        mr_asprintf(&tmp, _("%s (%ld K) is corrupt on tape"), temp_fname,
975                 (long) orig_size >> 10);
976        log_to_screen(tmp);
977        mr_free(tmp);
978        retval++;
979    }
980    mr_free(actual_cksum);
981    mr_free(datablock);
982    mr_free(temp_fname);
983    mr_free(temp_cksum);
984    return (retval);
985}
986
987
988/**
989 * Read a header block from the currently opened stream (CD or tape).
990 * This block indicates the length of the following file (if it's file-related)
991 * the filename (if it's file-related), and the block type.
992 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
993 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
994 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
995 * @return 0 for success, nonzero for failure.
996 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
997 */
998int
999read_header_block_from_stream(long long *plen, char *filename,
1000                              int *pcontrol_char)
1001{
1002
1003    /*@ buffers ***************************************************** */
1004    char *tempblock;
1005
1006    /*@ int ********************************************************* */
1007    int i, retval;
1008
1009    /*@ end vars *************************************************** */
1010
1011    tempblock = (char *) mr_malloc((size_t) TAPE_BLOCK_SIZE);
1012
1013    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1014        tempblock[i] = 0;
1015    }
1016    while (!(*pcontrol_char = tempblock[7000])) {
1017        g_tape_posK +=
1018            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1019                  g_tape_stream) / 1024;
1020    }
1021    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1022    if (strcmp(tempblock + 6000 + *pcontrol_char, "Mondolicious, baby")) {
1023        log_it("Bad header block at %ld K", (long) g_tape_posK);
1024    }
1025    strcpy(filename, tempblock + 1000);
1026    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1027        log_to_screen("I can't verify an aborted backup.");
1028        retval = 1;
1029    } else {
1030        retval = 0;
1031    }
1032    for (i = 1000; i < 1020; i++) {
1033        if (tempblock[i] < 32 || tempblock[i] > 126) {
1034            tempblock[i] = ' ';
1035        }
1036    }
1037    tempblock[i] = '\0';
1038    mr_msg(6, "%s (fname=%s, size=%ld K)",
1039            marker_to_string(*pcontrol_char), tempblock + 1000,
1040            (long) (*plen) >> 10);
1041    mr_free(tempblock);
1042    return (retval);
1043}
1044
1045
1046/**
1047 * Add specified file/slice to the internal catalog of all archives written.
1048 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1049 * write the last [buffer size] MB from the catalog to the new tape, so we know
1050 * we have @e all archives on some CD/tape/whatever.
1051 * @param type The type of file we're cataloging (afioball, slice, something else)
1052 * @param number The fileset number or biggiefile number.
1053 * @param aux The slice number if it's a biggiefile, or any other additional info.
1054 * @param fn The original full pathname of the file we're recording.
1055 * @return The index of the record we just added.
1056 */
1057int register_in_tape_catalog(t_archtype type, int number, long aux,
1058                             char *fn)
1059{
1060    char *fname = NULL;
1061    char *p = NULL;
1062    struct s_tapecat_entry *te = NULL;
1063    struct mr_list_elt *elt = NULL;
1064
1065    p = strrchr(fn, '/');
1066    if (p) {
1067        p++;
1068    } else {
1069        p = fn;
1070    }
1071    mr_asprintf(&fname, p);
1072
1073    te = (struct s_tapecat_entry *)mr_malloc(sizeof(struct s_tapecat_entry));
1074    te->type = type;
1075    te->number = number;
1076    te->aux = aux;
1077    te->tape_posK = g_tape_posK;
1078    /* BERLIOS: Check if this is written womewhere, as it's only a pointer */
1079    /* BERLIOS: Verify to purge fname correctly */
1080    te->fname = fname;
1081
1082    /* place the data in a list elt */
1083    elt = mr_list_alloc_elt((void *)te, mr_free_te);
1084    mr_list_add_elt_last(tapecatalog, elt);
1085
1086    // returns the index of the record we've just added
1087    return (mr_list_length(tapecatalog));
1088}
1089
1090
1091/**
1092 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1093 * (got SIGPIPE) or look like we will.
1094 * @param mediasize The size of the tape in megabytes.
1095 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1096 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1097 * autodetecting the size. Huh?
1098 */
1099
1100/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1101bool
1102should_we_write_to_next_tape(long mediasize,
1103                             off_t length_of_incoming_file)
1104{
1105    /*@ bool's ***************************************************** */
1106    bool we_need_a_new_tape = FALSE;
1107
1108    /*@ end vars *************************************************** */
1109
1110    if (mediasize == 0) {
1111        return (FALSE);
1112    }
1113    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1114        log_it("mediasize = %ld", mediasize);
1115        we_need_a_new_tape = TRUE;
1116        log_to_screen(_("Should have started a new tape/CD already"));
1117    }
1118    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1119        mediasize - (SLICE_SIZE * 4 / 1024)) {
1120        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1121               mediasize);
1122        we_need_a_new_tape = TRUE;
1123    }
1124    return (we_need_a_new_tape);
1125}
1126
1127
1128/**
1129 * Seek through the stream until we find a header block where the NAME field matches
1130 * @p the_file_I_was_reading. This is useful if you've just started reading from
1131 * a new tape and want to find the file you were reading when the tape ended.
1132 * @param the_file_I_was_reading File name to look for.
1133 * @return 0 for success, nonzero for failure.
1134 */
1135int skip_incoming_files_until_we_find_this_one(char
1136                                               *the_file_I_was_reading)
1137{
1138    char *pA;
1139    char *pB;
1140    int res;
1141    int ctrl_chr;
1142    char *temp_fname;
1143    char *datablock;
1144    long long temp_size, size;
1145    long bytes_to_write;
1146
1147    datablock = mr_malloc(TAPE_BLOCK_SIZE);
1148    malloc_string(temp_fname);
1149    pB = strrchr(the_file_I_was_reading, '/');
1150    if (pB) {
1151        pB++;
1152    } else {
1153        pB = the_file_I_was_reading;
1154    }
1155    mr_msg(1, "skip_incoming_..(%s)", pB);
1156    mr_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1157    ctrl_chr = -1;
1158    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1159        res =
1160            read_header_block_from_stream(&temp_size, temp_fname,
1161                                          &ctrl_chr);
1162        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1163            break;
1164        }
1165        mr_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1166        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1167        mr_msg(3, "Still trying to re-sync w/ tape");
1168    }
1169    while (ctrl_chr != BLK_START_FILE) {
1170        res =
1171            read_header_block_from_stream(&temp_size, temp_fname,
1172                                          &ctrl_chr);
1173        if (ctrl_chr == BLK_START_FILE) {
1174            break;
1175        }
1176        mr_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1177        wrong_marker(BLK_START_FILE, ctrl_chr);
1178        mr_msg(3, "Still trying to re-sync w/ tape");
1179    }
1180    pA = strrchr(temp_fname, '/');
1181    if (pA) {
1182        pA++;
1183    } else {
1184        pA = temp_fname;
1185    }
1186    pB = strrchr(the_file_I_was_reading, '/');
1187    if (pB) {
1188        pB++;
1189    } else {
1190        pB = the_file_I_was_reading;
1191    }
1192    while (strcmp(pA, pB)) {
1193        mr_msg(6, "Skipping %s (it's not %s)", temp_fname,
1194                the_file_I_was_reading);
1195        for (size = temp_size; size > 0; size -= bytes_to_write) {
1196            bytes_to_write =
1197                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1198            // FIXME - needs error-checking and -catching
1199            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1200        }
1201        res =
1202            read_header_block_from_stream(&temp_size, temp_fname,
1203                                          &ctrl_chr);
1204        if (ctrl_chr != BLK_STOP_FILE) {
1205            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1206        }
1207        res =
1208            read_header_block_from_stream(&temp_size, temp_fname,
1209                                          &ctrl_chr);
1210        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1211            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1212        }
1213        res =
1214            read_header_block_from_stream(&temp_size, temp_fname,
1215                                          &ctrl_chr);
1216        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1217            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1218        }
1219        res =
1220            read_header_block_from_stream(&temp_size, temp_fname,
1221                                          &ctrl_chr);
1222        if (ctrl_chr != BLK_START_FILE) {
1223            wrong_marker(BLK_START_FILE, ctrl_chr);
1224        }
1225        pA = strrchr(temp_fname, '/');
1226        if (pA) {
1227            pA++;
1228        } else {
1229            pA = temp_fname;
1230        }
1231        pB = strrchr(the_file_I_was_reading, '/');
1232        if (pB) {
1233            pB++;
1234        } else {
1235            pB = the_file_I_was_reading;
1236        }
1237    }
1238    mr_msg(2, "Reading %s (it matches %s)", temp_fname,
1239            the_file_I_was_reading);
1240    mr_free(temp_fname);
1241    mr_free(datablock);
1242    return (0);
1243}
1244
1245
1246/**
1247 * Start to read from the next tape. Assumes the user has already inserted it.
1248 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1249 * @return 0 for success, nonzero for failure.
1250 */
1251int start_to_read_from_next_tape(struct s_bkpinfo *bkpinfo)
1252{
1253    /*@ int ********************************************************* */
1254    int res = 0;
1255    char *sz_msg;
1256    int ctrlchr;
1257    long long temp_size;
1258    malloc_string(sz_msg);
1259    /*@ end vars *************************************************** */
1260
1261    paranoid_pclose(g_tape_stream);
1262    sync();
1263    sync();
1264    sync();
1265    log_it("Next tape requested.");
1266    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1267    log_it("Opening IN the next tape");
1268    if (!
1269        (g_tape_stream =
1270         open_device_via_buffer(bkpinfo->media_device, 'r',
1271                                bkpinfo->internal_tape_block_size))) {
1272        log_to_screen(_("Cannot openin stream device"));
1273        return (1);
1274    }
1275    g_tape_posK = 0;
1276    g_sigpipe = FALSE;
1277    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1278    if (ctrlchr != BLK_START_OF_TAPE) {
1279        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1280    }
1281    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1282    if (ctrlchr != BLK_START_OF_BACKUP) {
1283        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1284    } else {
1285        mr_msg(3, "Next tape opened OK. Whoopee!");
1286    }
1287    mr_free(sz_msg);
1288    return (res);
1289}
1290
1291
1292/**
1293 * Start to write to the next tape. Assume the user has already inserted it.
1294 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1295 * @return 0 for success, nonzero for failure.
1296 */
1297int start_to_write_to_next_tape(struct s_bkpinfo *bkpinfo)
1298{
1299    int res = 0;
1300    char *command = NULL;
1301
1302    paranoid_pclose(g_tape_stream);
1303    sync();
1304    sync();
1305    sync();
1306    log_it("New tape requested.");
1307    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1308    if (bkpinfo->backup_media_type == cdstream) {
1309        mr_asprintf(&command,
1310                 "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1311                 bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE,
1312                 MONDO_LOGFILE);
1313        log_it("Opening OUT to next CD with the command");
1314        log_it(command);
1315        log_it("Let's see what happens, shall we?");
1316        g_tape_stream = popen(command, "w");
1317        mr_free(command);
1318        if (!g_tape_stream) {
1319            log_to_screen(_("Failed to openout to cdstream (fifo)"));
1320            return (1);
1321        }
1322    } else {
1323        log_it("Opening OUT to next tape");
1324        if (!
1325            (g_tape_stream =
1326             open_device_via_buffer(bkpinfo->media_device, 'w',
1327                                    bkpinfo->internal_tape_block_size))) {
1328            log_to_screen(_("Cannot openin stream device"));
1329            return (1);
1330        }
1331    }
1332    g_tape_posK = 0;
1333    g_sigpipe = FALSE;
1334    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1335    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1336    return (res);
1337}
1338
1339
1340/**
1341 * Write a bufferfull of the most recent archives to the tape. The
1342 * rationale behind this is a bit complex. If the previous tape ended
1343 * suddenly (EOF or otherwise) some archives were probably left in the
1344 * buffer. That means that Mondo thinks they have been written, but
1345 * the external binary @c buffer has not actually written them. So to
1346 * be safe, we start the new tape by writing the last bufferfull from
1347 * the old one. This insures that all archives will be on at least
1348 * one tape. Sounds inelegant, but it works.
1349 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1350 * @return 0 for success, nonzero for failure.
1351 */
1352int write_backcatalog_to_tape(struct s_bkpinfo *bkpinfo)
1353{
1354    int res = 0;
1355    char *fname = NULL;
1356    struct mr_list_elt *elt = NULL;
1357    struct s_tapecat_entry *te = NULL;
1358
1359    mr_msg(2, "I am now writing back catalog to tape");
1360    elt = tapecatalog->first;
1361    while (elt != NULL) {
1362        te = (struct s_tapecat_entry *) elt->data;
1363        mr_asprintf(&fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir, te->fname);
1364        if (!does_file_exist(fname)) {
1365            mr_msg(6, "Can't write %s - it doesn't exist.", fname);
1366        } else {
1367            write_header_block_to_stream(length_of_file(fname),
1368                                         "start-backcatalog-afio-or-slice",
1369                                         BLK_START_AN_AFIO_OR_SLICE);
1370            mr_msg(2, "Writing %s", fname);
1371            if (write_file_to_stream_from_file(bkpinfo, fname)) {
1372                res++;
1373                mr_msg(2, "%s failed", fname);
1374            }
1375            if (elt != tapecatalog->last) {
1376                write_header_block_to_stream((off_t)0,
1377                                             "stop-backcatalog-afio-or-slice",
1378                                             BLK_STOP_AN_AFIO_OR_SLICE);
1379            }
1380        }
1381        mr_free(fname);
1382        elt = elt->next;
1383    }
1384    mr_msg(2, "Finished writing back catalog to tape");
1385    return (res);
1386}
1387
1388
1389/**
1390 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1391 * @param fname The path to all.tar.gz.
1392 * @return 0 for success, nonzero for failure.
1393 */
1394int write_data_disks_to_stream(char *fname)
1395{
1396    /*@ pointers *************************************************** */
1397    FILE *fin = NULL;
1398    char *tmp = NULL;
1399
1400    /*@ long ******************************************************* */
1401    long m = -1;
1402    long templong;
1403
1404    /*@ int ******************************************************** */
1405    int i, j;
1406
1407    /*@ buffers **************************************************** */
1408    char tempblock[256 * 1024];
1409
1410    /*@ end vars *************************************************** */
1411
1412    open_evalcall_form(_("Writing data disks to tape"));
1413    log_to_screen(_("Writing data disks to tape"));
1414    log_it("Data disks = %s", fname);
1415    if (!does_file_exist(fname)) {
1416        mr_asprintf(&tmp, _("Cannot find %s"), fname);
1417        log_to_screen(tmp);
1418        mr_free(tmp);
1419        return (1);
1420    }
1421    if (!(fin = fopen(fname, "r"))) {
1422        log_OS_error(fname);
1423        fatal_error("Cannot openin the data disk");
1424    }
1425    for (i = 0; i < 32; i++) {  /* 32MB */
1426        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1427            if (!feof(fin)) {
1428                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1429            } else {
1430                m = 0;
1431            }
1432            for (; m < 256 * 1024; m++) {
1433                tempblock[m] = '\0';
1434            }
1435            g_tape_posK +=
1436                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1437        }
1438        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1439        {
1440            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1441            update_evalcall_form((int) (templong));
1442        }
1443    }
1444    paranoid_fclose(fin);
1445    close_evalcall_form();
1446    return (0);
1447}
1448
1449
1450/**
1451 * Copy @p infile to the opened stream (CD or tape).
1452 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1453 * @param infile The file to write to the stream.
1454 * @return 0 for success, nonzero for failure.
1455 */
1456int write_file_to_stream_from_file(struct s_bkpinfo *bkpinfo, char *infile)
1457{
1458    /*@ buffers **************************************************** */
1459    char *tmp = NULL;
1460    char datablock[TAPE_BLOCK_SIZE];
1461    char *checksum = NULL;
1462    char *infile_basename = NULL;
1463
1464    /*@ int ******************************************************** */
1465    int retval = 0;
1466    int noof_blocks;
1467
1468    /*  unsigned int ch; */
1469    unsigned int crc16;
1470    unsigned int crctt;
1471
1472    /*@ pointers *************************************************** */
1473    FILE *fin;
1474    char *p;
1475
1476    /*@ long ******************************************************* */
1477    long bytes_to_read = 0;
1478    long i;
1479
1480    off_t filesize;
1481
1482#ifdef EXTRA_TAPE_CHECKSUMS
1483    int ch;
1484#endif
1485
1486    /*@ initialize ************************************************ */
1487    crc16 = 0;
1488    crctt = 0;
1489
1490    /*@ end vars *************************************************** */
1491
1492    infile_basename = strrchr(infile, '/');
1493    if (infile_basename) {
1494        infile_basename++;
1495    } else {
1496        infile_basename = infile;
1497    }
1498    filesize = length_of_file(infile);
1499    if (should_we_write_to_next_tape
1500        (bkpinfo->media_size, filesize)) {
1501        start_to_write_to_next_tape(bkpinfo);
1502        write_backcatalog_to_tape(bkpinfo);
1503    }
1504    p = strrchr(infile, '/');
1505    if (!p) {
1506        p = infile;
1507    } else {
1508        p++;
1509    }
1510    mr_asprintf(&tmp, "Writing file '%s' to tape (%ld KB)", p,
1511             (long) filesize >> 10);
1512    log_it(tmp);
1513    mr_free(tmp);
1514
1515    write_header_block_to_stream(filesize, infile_basename,
1516                                 BLK_START_FILE);
1517//go_here_to_restart_saving_of_file:
1518    if (!(fin = fopen(infile, "r"))) {
1519        log_OS_error(infile);
1520        return (1);
1521    }
1522    for (noof_blocks = 0; filesize > 0;
1523         noof_blocks++, filesize -= bytes_to_read) {
1524        if (filesize < TAPE_BLOCK_SIZE) {
1525            bytes_to_read = (long) filesize;
1526            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1527                datablock[i] = '\0';
1528            }
1529        } else {
1530            bytes_to_read = TAPE_BLOCK_SIZE;
1531        }
1532        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1533        g_tape_posK += fwrite(datablock, 1, /*bytes_to_read */
1534                              (size_t) TAPE_BLOCK_SIZE,
1535                              g_tape_stream) / 1024;
1536        if (g_sigpipe) {
1537            iamhere("Sigpipe occurred recently. I'll start a new tape.");
1538            fclose(fin);
1539            g_sigpipe = FALSE;
1540            start_to_write_to_next_tape(bkpinfo);
1541            write_backcatalog_to_tape(bkpinfo); // kinda-sorta recursive :)
1542            return (0);
1543        }
1544#ifdef EXTRA_TAPE_CHECKSUMS
1545        for (i = 0; i < bytes_to_read; i++) {
1546            ch = datablock[i];
1547            crc16 = updcrcr(crc16, (unsigned) ch);
1548            crctt = updcrc(crctt, (unsigned) ch);
1549        }
1550#endif
1551    }
1552    paranoid_fclose(fin);
1553    mr_asprintf(&checksum, "%04x%04x", crc16, crctt);
1554    /* BERLIOS: what does it do ??? */
1555    write_header_block_to_stream((off_t)g_current_media_number, checksum,
1556                                 BLK_STOP_FILE);
1557    mr_free(checksum);
1558//  log_it("File '%s' written to tape.", infile);
1559    return (retval);
1560}
1561
1562
1563/**
1564 * Write a header block to the opened stream (CD or tape).
1565 * @param length_of_incoming_file The length to store in the header block.
1566 * Usually matters only if this is a file-related header, in which case it should
1567 * be the length of the file that will follow.
1568 * @param filename The filename to store in the header block. Usually matters
1569 * only if this is a file-related header, in which case this should be the name
1570 * if the file that will follow.
1571 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1572 * @return 0 for success, nonzero for failure.
1573 */
1574int
1575write_header_block_to_stream(off_t length_of_incoming_file,
1576                             char *filename, int control_char)
1577{
1578    /*@ buffers **************************************************** */
1579    char tempblock[TAPE_BLOCK_SIZE];
1580    char *p;
1581
1582    /*@ int ******************************************************** */
1583    int i;
1584
1585    off_t olen;
1586
1587    /*@ end vars *************************************************** */
1588
1589
1590    olen = length_of_incoming_file;
1591    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1592    if (!p) {
1593        p = filename;
1594    } else {
1595        p++;
1596    }
1597    if (!g_tape_stream) {
1598        log_to_screen
1599            (_("You're not backing up to tape. Why write a tape header?"));
1600        return (1);
1601    }
1602    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1603        tempblock[i] = 0;
1604    }
1605    sprintf(tempblock + 6000 + control_char, "Mondolicious, baby");
1606    tempblock[7000] = control_char;
1607    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1608    strcpy(tempblock + 1000, filename);
1609    g_tape_posK +=
1610        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1611               g_tape_stream) / 1024;
1612    mr_msg(6, "%s (fname=%s, size=%ld K)",
1613            marker_to_string(control_char), p,
1614            (long) length_of_incoming_file >> 10);
1615    return (0);
1616}
1617
1618
1619/**
1620 * Log (to screen) an erroneous marker, along with what it should have been.
1621 * @param should_be What we were expecting.
1622 * @param it_is What we got.
1623 */
1624void wrong_marker(int should_be, int it_is)
1625{
1626    /*@ buffer ***************************************************** */
1627    char *tmp = NULL;
1628
1629
1630    /*@ end vars *************************************************** */
1631    mr_asprintf(&tmp, _("Wrong marker! (Should be %s, is actually %s)"),
1632             marker_to_string(should_be), marker_to_string(it_is));
1633    log_to_screen(tmp);
1634    mr_free(tmp);
1635}
1636
1637/* @} - end of streamGroup */
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