source: trunk/mondo/mondo/common/libmondo-stream.c @ 688

Last change on this file since 688 was 688, checked in by bcornec, 13 years ago

Huge memory management patch.
Still not finished but a lot as been done.
What remains is around some functions returning strings, and some structure members.
(Could not finish due to laptop failure !)

  • Property svn:keywords set to Id
File size: 46.8 KB
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1/* $Id: libmondo-stream.c 688 2006-07-17 13:44:46Z bcornec $
2
3...tools for talking to tapes, Monitas streams, etc.
4*/
5
6/*
7 *
8 * @file
9 * Functions for writing data to/reading data from streams (tape, CD stream, etc.)
10 */
11
12#include <unistd.h>
13
14#include "my-stuff.h"
15#include "mondostructures.h"
16#include "libmondo-devices.h"
17#include "libmondo-stream.h"
18#include "libmondo-string-EXT.h"
19#include "libmondo-files-EXT.h"
20#include "newt-specific-EXT.h"
21#include "libmondo-fork-EXT.h"
22#include "libmondo-tools-EXT.h"
23#include "libmondo-fifo-EXT.h"
24
25#define EXTRA_TAPE_CHECKSUMS
26
27extern bool g_sigpipe;
28extern int g_tape_buffer_size_MB;
29
30/**
31 * @addtogroup globalGroup
32 * @{
33 */
34/**
35 * The file pointer for the opened tape/CD stream.
36 * Opened and closed by openin_tape(), openin_cdstream(),
37 * openout_tape(), openout_cdstream(), closein_tape(), closein_cdstream(),
38 * closeout_tape(), and closeout_cdstream().
39 */
40FILE *g_tape_stream = NULL;
41
42
43/**
44 * The position (in kilobytes) where we are on the tape.
45 */
46long long g_tape_posK = 0;
47
48/**
49 * The current media number we're using. This value is 1-based.
50 */
51int g_current_media_number = -1;
52
53/**
54 * The tape catalog that keeps track of files written to tape.
55 */
56struct s_tapecatalog *g_tapecatalog;
57
58/* @} - end of globalGroup */
59
60int write_backcatalog_to_tape(struct s_bkpinfo *bkpinfo);
61
62
63
64
65
66/**
67 * @addtogroup streamGroup
68 * @{
69 */
70/**
71 * Close the global output file descriptor which Mondo has used to read
72 * from the CD stream.
73 * @param bkpinfo The backup information structure. Passed directly to closein_tape().
74 * @return 0 for success, nonzero for failure.
75 * @note This should be called by restore processes only.
76 */
77int closein_cdstream(struct s_bkpinfo *bkpinfo)
78{
79    return (closein_tape(bkpinfo));
80}
81
82
83/**
84 * Close the global output file descriptor which Mondo has used to read
85 * from buffer or dd, which read from the tape.
86 * @param bkpinfo The backup information structure. Unused.
87 * @return 0 for success, nonzero for failure.
88 * @note This should be called by restore processes only.
89 * @note This function also works for cdstreams for now, but don't count on this behavior.
90 * @bug @p bkpinfo parameter is unused.
91 */
92int closein_tape(struct s_bkpinfo *bkpinfo)
93{
94    /*@ int's ******************************************************* */
95    int retval = 0;
96    int res = 0;
97    int ctrl_chr = '\0';
98
99    /*@ long long's ************************************************* */
100    long long size;
101    char *blk;
102    int i;
103
104    blk = (char *) malloc(256 * 1024);
105
106    log_it("closein_tape() -- entering");
107    res = read_header_block_from_stream(&size, NULL, &ctrl_chr);
108    retval += res;
109    if (ctrl_chr != BLK_END_OF_BACKUP) {
110        wrong_marker(BLK_END_OF_BACKUP, ctrl_chr);
111    }
112    res = read_header_block_from_stream(&size, NULL, &ctrl_chr);
113    retval += res;
114    if (ctrl_chr != BLK_END_OF_TAPE) {
115        wrong_marker(BLK_END_OF_TAPE, ctrl_chr);
116    }
117    for (i = 0; i < 8 && !feof(g_tape_stream); i++) {
118        (void) fread(blk, 1, 256 * 1024, g_tape_stream);
119    }
120    sleep(1);
121    sync();
122    sleep(1);
123    paranoid_pclose(g_tape_stream);
124    log_it("closein_tape() -- leaving");
125    if (!bkpinfo->please_dont_eject) {
126        eject_device(bkpinfo->media_device);
127    }
128    paranoid_free(blk);
129    paranoid_free(g_tapecatalog);
130    return (retval);
131}
132
133
134
135/**
136 * Close the global output file descriptor which Mondo has been using to write
137 * to the tape device (via buffer or dd).
138 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
139 * @return 0 for success, nonzero for failure.
140 * @note This should be called by backup processes only.
141 */
142int closeout_tape(struct s_bkpinfo *bkpinfo)
143{
144    /*@ int's ******************************************************* */
145    int retval = 0;
146
147    /*@ long long's ************************************************* */
148    int i;
149    char *blk;
150
151    blk = (char *) malloc(256 * 1024);
152
153    sleep(1);
154    sync();
155    sleep(1);
156    log_it("closeout_tape() -- entering");
157    retval +=
158        write_header_block_to_stream((off_t)0, "end-of-backup",
159                                     BLK_END_OF_BACKUP);
160    retval += write_header_block_to_stream((off_t)0, "end-of-tape", BLK_END_OF_TAPE);   /* just in case */
161    /* write 1MB of crap */
162    for (i = 0; i < 256 * 1024; i++) {
163        blk[i] = (int) (random() & 0xFF);
164    }
165    for (i = 0; i < 4 * 8; i++) {
166        (void) fwrite(blk, 1, 256 * 1024, g_tape_stream);
167        if (should_we_write_to_next_tape
168            (bkpinfo->media_size[g_current_media_number], (off_t)256 * 1024)) {
169            start_to_write_to_next_tape(bkpinfo);
170        }
171    }
172    sleep(2);
173    paranoid_pclose(g_tape_stream);
174    log_it("closeout_tape() -- leaving");
175    for (i = 0; i < g_tapecatalog->entries; i++) {
176        log_it("i=%d type=%s num=%d aux=%ld posK=%lld", i,
177               (g_tapecatalog->el[i].type ==
178                fileset) ? "fileset" : "bigslice",
179               g_tapecatalog->el[i].number, g_tapecatalog->el[i].aux,
180               g_tapecatalog->el[i].tape_posK);
181    }
182    paranoid_free(blk);
183    paranoid_free(g_tapecatalog);
184    return (retval);
185}
186
187
188
189bool mt_says_tape_exists(char *dev)
190{
191    char *command;
192    int res;
193
194    asprintf(&command, "mt -f %s status", dev);
195    res = run_program_and_log_output(command, 1);
196    paranoid_free(command);
197    if (res) {
198        return (FALSE);
199    } else {
200        return (TRUE);
201    }
202}
203
204
205
206/**
207 * Determine the name and size of the tape device. Tries the SCSI tape for
208 * this platform, then the IDE tape, then "/dev/st0", then "/dev/osst0".
209 * @param dev Where to put the found tape device.
210 * @param siz Where to put the tape size (a string like "4GB"). Should be freed by caller
211 * @return 0 if success, nonzero if failure (in which @p dev and @p siz are undefined).
212 */
213int find_tape_device_and_size(char *dev, char *siz)
214{
215    char *tmp = NULL;
216    char *tmp1 = NULL;
217    char *command = NULL;
218    char *cdr_exe = NULL;
219    int res = 0;
220
221    log_to_screen("I am looking for your tape streamer. Please wait.");
222    dev = NULL;
223    siz = NULL;
224    if (find_home_of_exe("cdrecord")) {
225        asprintf(&cdr_exe, "cdrecord");
226    } else {
227        asprintf(&cdr_exe, "dvdrecord");
228    }
229    asprintf(&command, "%s -scanbus 2> /dev/null | grep -i tape | wc -l",
230             cdr_exe);
231    tmp = call_program_and_get_last_line_of_output(command);
232    paranoid_free(command);
233
234    if (atoi(tmp) != 1) {
235        log_it
236            ("Either too few or too many tape streamers for me to detect...");
237        asprintf(&dev, VANILLA_SCSI_TAPE"0");
238        paranoid_free(tmp);
239        paranoid_free(cdr_exe);
240        return 1;
241    }
242    paranoid_free(tmp);
243
244    asprintf(&command,
245             "%s -scanbus 2> /dev/null | tr -s '\t' ' ' | grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | cut -d' ' -f2 | head -n1",
246             cdr_exe);
247    tmp = call_program_and_get_last_line_of_output(command);
248    paranoid_free(command);
249    if (strlen(tmp) < 2) {
250        log_it("Could not find tape device");
251        paranoid_free(tmp);
252        paranoid_free(cdr_exe);
253        return 1;
254    }
255    paranoid_free(tmp);
256
257    asprintf(&command,
258             "%s -scanbus 2> /dev/null | tr -s '\t' ' ' | grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | cut -d' ' -f3 | cut -d')' -f1 | head -n1",
259             cdr_exe);
260    paranoid_free(cdr_exe);
261
262    tmp = call_program_and_get_last_line_of_output(command);
263    paranoid_free(command);
264
265    asprintf(&dev, VANILLA_SCSI_TAPE"%s", tmp);
266    paranoid_free(tmp);
267
268    if (!mt_says_tape_exists(dev)) {
269        paranoid_free(dev); 
270
271        asprintf(&dev, ALT_TAPE"%s", tmp);
272        if (!mt_says_tape_exists(dev)) {
273            log_it("Cannot openin %s", dev);
274            paranoid_free(dev); 
275
276            asprintf(&dev, VANILLA_SCSI_TAPE"0");
277            if (!mt_says_tape_exists(dev)) {
278                log_it("Cannot openin %s", dev);
279                paranoid_free(dev); 
280
281                asprintf(&dev, "/dev/osst0");
282                if (!mt_says_tape_exists(dev)) {
283                    res++;
284                } else {
285                    res = 0;
286                }
287            }
288        }
289    }
290
291    log_it("At this point, dev = %s and res = %d", dev, res);
292
293    tmp = call_program_and_get_last_line_of_output("\
294cdrecord -scanbus 2> /dev/null | tr -s '\t' ' ' | \
295grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | \
296awk '{for(i=1; i<NF; i++) { if (index($i, \"GB\")>0) { print $i;};};};'");
297
298    if (mt_says_tape_exists(dev)) {
299        res = 0;
300    } else {
301        log_it("Turning %s", dev);
302        paranoid_free(tmp);
303        asprintf(&tmp1,
304                 (strrchr(dev, '/') != NULL) ? strrchr(dev, '/') : dev);
305        paranoid_free(dev);
306        asprintf(&dev, "/dev/os%s", tmp1);
307        paranoid_free(tmp1);
308
309        log_it("...into %s", dev);
310        if (mt_says_tape_exists(dev)) {
311            res = 0;
312        } else {
313            res++;
314        }
315    }
316
317    log_it("res=%d; dev=%s", res, dev);
318
319    if (res) {
320        paranoid_free(tmp);
321        return (res);
322    }
323
324    if (strlen(tmp) < 2) {
325        log_it("Warning - size of tape unknown");
326        paranoid_free(tmp);
327        return (0);
328    } else {
329        siz = tmp;
330        return (0);
331    }
332}
333
334int read_EXAT_files_from_tape(struct s_bkpinfo *bkpinfo,
335                              long long *ptmp_size, char *tmp_fname,
336                              int *pctrl_chr, char *xattr_fname,
337                              char *acl_fname)
338{
339    int res = 0;
340    int retval = 0;
341    char *fname = (char *)&res;         /* Should NOT be NULL */
342
343// xattr
344    res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
345    if (*pctrl_chr != BLK_START_EXAT_FILE) {
346        wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
347    }
348    if (!strstr(fname, "xattr")) {
349        fatal_error("Wrong order, sunshine.");
350    }
351    paranoid_free(fname);
352    fname = (char *)&res;
353    read_file_from_stream_to_file(bkpinfo, xattr_fname, *ptmp_size);
354    res = read_header_block_from_stream(ptmp_size, NULL, pctrl_chr);
355    if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
356        wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
357    }
358    // acl
359    res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
360    if (!strstr(fname, "acl")) {
361        fatal_error("Wrong order, sunshine.");
362    }
363    paranoid_free(fname);
364    fname = (char *)&res;
365    if (*pctrl_chr != BLK_START_EXAT_FILE) {
366        wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
367    }
368    read_file_from_stream_to_file(bkpinfo, acl_fname, *ptmp_size);
369    res = read_header_block_from_stream(ptmp_size, NULL, pctrl_chr);
370    if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
371        wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
372    }
373    res = read_header_block_from_stream(ptmp_size, NULL, pctrl_chr);
374    if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
375        wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
376    }
377    // tarball itself
378    res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
379    log_msg(1, "Got xattr and acl; now looking for afioball");
380    tmp_fname = fname;
381    return (retval);
382}
383
384
385int write_EXAT_files_to_tape(struct s_bkpinfo *bkpinfo, char *xattr_fname,
386                             char *acl_fname)
387{
388    int res = 0;
389    // EXATs
390    write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
391                                 BLK_START_EXTENDED_ATTRIBUTES);
392    // xattr
393    write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
394                                 BLK_START_EXAT_FILE);
395    write_file_to_stream_from_file(bkpinfo, xattr_fname);
396    write_header_block_to_stream((off_t)-1, xattr_fname, BLK_STOP_EXAT_FILE);
397// acl
398    write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
399                                 BLK_START_EXAT_FILE);
400    write_file_to_stream_from_file(bkpinfo, acl_fname);
401    write_header_block_to_stream((off_t)-1, acl_fname, BLK_STOP_EXAT_FILE);
402    write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
403                                 BLK_STOP_EXTENDED_ATTRIBUTES);
404    return (res);
405}
406
407
408
409
410/**
411 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
412 * @param tapeno The tape number to insist on.
413 * @bug There is currently no way to actually verify that the user has actually
414 * inserted the right tape.
415 */
416void insist_on_this_tape_number(int tapeno)
417{
418    int i;
419    char *tmp;
420
421    log_it("Insisting on tape #%d", tapeno);
422    if (g_current_media_number != tapeno) {
423        //      log_it("g_current_media_number = %d", g_current_media_number);
424        asprintf(&tmp,
425                 _("When the tape drive goes quiet, please insert volume %d in this series."),
426                 tapeno);
427        popup_and_OK(tmp);
428        paranoid_free(tmp);
429        open_evalcall_form(_("Waiting while the tape drive settles"));
430    } else {
431        open_evalcall_form(_("Waiting while the tape drive rewinds"));
432    }
433
434    for (i = 0; i <= 100; i += 2) {
435        usleep(100000);
436        update_evalcall_form(i);
437    }
438    close_evalcall_form();
439    log_it("I assume user has inserted it. They _say_ they have...");
440    g_current_media_number = tapeno;
441
442    //  log_it("g_current_media_number = %d", g_current_media_number);
443    log_it("OK, I've finished insisting. On with the revelry.");
444}
445
446
447/**
448 * Debugging aid - log the offset we're at on the tape (reading or writing).
449 */
450void log_tape_pos(void)
451{
452    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
453           (long) g_tape_posK >> 10);
454}
455
456
457
458
459/**
460 * Add a file to a collection of recently archived filesets/slices.
461 * The type is determined by the filename: if it contains ".afio." it is
462 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
463 * otherwise we generate a fatal_error().
464 * @param td The current @c bkpinfo->tempdir (file will be placed in <tt>td</tt>/tmpfs/backcatalog/).
465 * @param latest_fname The file to place in the collection.
466 * @return 0, always.
467 * @bug Return value is redundant.
468 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
469 */
470int maintain_collection_of_recent_archives(char *td, char *latest_fname)
471{
472    long long final_alleged_writeK, final_projected_certain_writeK,
473        final_actually_certain_writeK = 0, cposK, bufsize_K;
474    int last, curr, i;
475    t_archtype type = other;
476    char *command;
477    char *tmpdir;
478    char *old_fname;
479
480    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
481    asprintf(&tmpdir, "%s/tmpfs/backcatalog", td);
482    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
483        type = fileset;
484    } else if (strstr(latest_fname, "slice")) {
485        type = biggieslice;
486    } else {
487        log_it("fname = %s", latest_fname);
488        fatal_error
489            ("Unknown type. Internal error in maintain_collection_of_recent_archives()");
490    }
491    mkdir(tmpdir, 0x700);
492    asprintf(&command, "cp -f %s %s", latest_fname, tmpdir);
493    if (run_program_and_log_output(command, 6)) {
494        log_it("Warning - failed to copy %s to backcatalog at %s",
495               latest_fname, tmpdir);
496    }
497    paranoid_free(command);
498
499    last = g_tapecatalog->entries - 1;
500    if (last <= 0) {
501        iamhere("Too early to start deleting from collection.");
502        return (0);
503    }
504    final_alleged_writeK = g_tapecatalog->el[last].tape_posK;
505    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
506    for (curr = last; curr >= 0; curr--) {
507        cposK = g_tapecatalog->el[curr].tape_posK;
508        if (cposK < final_projected_certain_writeK) {
509            final_actually_certain_writeK = cposK;
510            break;
511        }
512    }
513    if (curr < 0) {
514        iamhere
515            ("Not far enough into tape to start deleting old archives from collection.");
516        return (0);
517    }
518//  log_it( "There are %lld KB (more than %d KB) in my backcatalog", final_alleged_writeK - final_actually_certain_writeK, bufsize_K);
519
520    for (i = curr - 1; i >= 0 && curr - i < 10; i--) {
521        asprintf(&old_fname, "%s/%s", tmpdir, g_tapecatalog->el[i].fname);
522        unlink(old_fname);
523        paranoid_free(old_fname);
524    }
525    paranoid_free(tmpdir);
526    return (0);
527}
528
529
530/**
531 * Open the CD stream for input.
532 * @param bkpinfo The backup information structure. Passed to openin_tape().
533 * @return 0 for success, nonzero for failure.
534 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
535 */
536int openin_cdstream(struct s_bkpinfo *bkpinfo)
537{
538    return (openin_tape(bkpinfo));
539}
540
541
542/**
543 * FIFO used to read/write to the tape device.
544 * @bug This seems obsolete now that we call an external @c buffer program. Please look onto this.
545 */
546char g_tape_fifo[MAX_STR_LEN];
547
548int set_tape_block_size_with_mt(char *tapedev,
549                                long internal_tape_block_size)
550{
551    char *tmp;
552    int res;
553
554    if (strncmp(tapedev, "/dev/", 5)) {
555        log_msg(1,
556                "Not using 'mt setblk'. This isn't an actual /dev entry.");
557        return (0);
558    }
559    asprintf(&tmp, "mt -f %s setblk %ld", tapedev,
560             internal_tape_block_size);
561    res = run_program_and_log_output(tmp, 3);
562    paranoid_free(tmp);
563    return (res);
564}
565
566
567/**
568 * Open the tape device for input.
569 * @param bkpinfo The backup information structure. Fields used:
570 * - @c bkpinfo->media_device
571 * - @c bkpinfo->tmpdir
572 * @return 0 for success, nonzero for failure.
573 * @note This will also work with a cdstream for now, but don't count on this behavior.
574 */
575int openin_tape(struct s_bkpinfo *bkpinfo)
576{
577    /*@ buffer ***************************************************** */
578    char *datablock;
579    char *tmp;
580    char old_cwd[MAX_STR_LEN];
581    char *outfname;
582    /*@ int ******************************************************* */
583    int i;
584    int j;
585    int res;
586    long length, templong;
587    size_t k;
588    int retval = 0;
589    int ctrl_chr;
590
591    /*@ long long ************************************************* */
592    long long size;
593
594    /*@ pointers ************************************************** */
595    FILE *fout;
596
597    /*@ end vars *************************************************** */
598
599    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
600    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
601        fatal_error("Cannot alloc mem for tape catalog");
602    }
603    g_tapecatalog->entries = 0;
604    g_tape_posK = 0;
605    if (g_tape_stream) {
606        log_it("FYI - I won't 'openin' the tape. It's already open.");
607        return (0);
608    }
609    insist_on_this_tape_number(1);
610    asprintf(&outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
611    make_hole_for_file(outfname);
612
613    set_tape_block_size_with_mt(bkpinfo->media_device,
614                                bkpinfo->internal_tape_block_size);
615
616    log_it("Opening IN tape");
617    if (!
618        (g_tape_stream =
619         open_device_via_buffer(bkpinfo->media_device, 'r',
620                                bkpinfo->internal_tape_block_size))) {
621        log_OS_error(g_tape_fifo);
622        log_to_screen(_("Cannot openin stream device"));
623        return (1);
624    }
625    log_to_screen(_("Reading stream"));
626    log_it("stream device = '%s'", bkpinfo->media_device);
627/* skip data disks */
628    open_evalcall_form("Skipping data disks on stream");
629    log_to_screen(_("Skipping data disks on stream"));
630    if (!(fout = fopen(outfname, "w"))) {
631        log_OS_error(outfname);
632        log_to_screen(_("Cannot openout datadisk all.tar.gz file"));
633        return (-1);
634    }
635    if (!(datablock = (char *) malloc(256 * 1024))) {
636        log_to_screen(_("Unable to malloc 256*1024"));
637        exit(1);
638    }
639    for (i = 0; i < 32; i++) {
640        for (j = 0; j < 4; j++) {
641            for (length = 0, k = 0; length < 256 * 1024; length += k) {
642                k = fread(datablock + length, 1, 256 * 1024 - length,
643                          g_tape_stream);
644            }
645            (void) fwrite(datablock, 1, (size_t) length, fout);
646            g_tape_posK += length / 1024;
647        }
648        if (i > 8)              // otherwise, 'buffer' distorts calculations
649        {
650            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
651            update_evalcall_form((int) (templong));
652        }
653    }
654    paranoid_fclose(fout);
655    paranoid_free(datablock);
656    /* find initial blocks */
657    res = read_header_block_from_stream(&size, NULL, &ctrl_chr);
658    retval += res;
659    if (ctrl_chr != BLK_START_OF_TAPE) {
660        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
661    }
662    res = read_header_block_from_stream(&size, NULL, &ctrl_chr);
663    retval += res;
664    if (ctrl_chr != BLK_START_OF_BACKUP) {
665        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
666    }
667    close_evalcall_form();
668    log_it("Saved all.tar.gz to '%s'", outfname);
669    (void) getcwd(old_cwd, MAX_STR_LEN);
670    chdir(bkpinfo->tmpdir);
671    asprintf(&tmp, "tar -zxf %s tmp/mondo-restore.cfg 2> /dev/null",
672             outfname);
673    paranoid_system(tmp);
674    paranoid_free(tmp);
675    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
676    chdir(old_cwd);
677    unlink(outfname);
678    paranoid_free(outfname);
679    return (retval);
680}
681
682
683/**
684 * Start writing to a CD stream.
685 * @param cddev The CD device to openout via cdrecord.
686 * @param speed The speed to write at.
687 * @return 0 for success, nonzero for failure.
688 * @note This should be called only from backup processes.
689 */
690int openout_cdstream(char *cddev, int speed)
691{
692    /*@ buffers ***************************************************** */
693    char *command;
694
695    /*@ end vars *************************************************** */
696
697    /*  add 'dummy' if testing */
698    asprintf(&command,
699             "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
700             cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
701    /*  initialise the catalog */
702    g_current_media_number = 1;
703    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
704        fatal_error("Cannot alloc mem for tape catalog");
705    }
706    g_tapecatalog->entries = 0;
707    /* log stuff */
708    log_it("Opening OUT cdstream with the command");
709    log_it(command);
710    /*  log_it("Let's see what happens, shall we?"); */
711    g_tape_stream = popen(command, "w");
712    paranoid_free(command);
713    if (g_tape_stream) {
714        return (0);
715    } else {
716        log_to_screen(_("Failed to openout to cdstream (fifo)"));
717        return (1);
718    }
719}
720
721
722/**
723 * Start writing to a tape device for the backup.
724 * @param tapedev The tape device to open for writing.
725 * @return 0 for success, nonzero for failure.
726 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
727 * EXISTING DATA on the tape!
728 */
729int openout_tape(char *tapedev, long internal_tape_block_size)
730{
731    g_current_media_number = 1;
732    if (g_tape_stream) {
733        log_it("FYI - I won't 'openout' the tape. It's already open.");
734        return (0);
735    }
736    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
737        fatal_error("Cannot alloc mem for tape catalog");
738    }
739    g_tapecatalog->entries = 0;
740    g_tape_posK = 0;
741
742    set_tape_block_size_with_mt(tapedev, internal_tape_block_size);
743    log_it("Opening OUT tape");
744    if (!
745        (g_tape_stream =
746         open_device_via_buffer(tapedev, 'w', internal_tape_block_size))) {
747        log_OS_error(g_tape_fifo);
748        log_to_screen(_("Cannot openin stream device"));
749        return (1);
750    }
751    return (0);
752}
753
754
755/**
756 * Copy a file from the opened stream (CD or tape) to @p outfile.
757 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
758 * @param outfile The file to write to.
759 * @param size The size of the file in the input stream.
760 * @return 0 for success, nonzero for failure.
761 */
762int
763read_file_from_stream_to_file(struct s_bkpinfo *bkpinfo, char *outfile,
764                              long long size)
765{
766
767    /*@ int ******************************************************** */
768    int res;
769
770    /*@ end vars *************************************************** */
771
772    res = read_file_from_stream_FULL(bkpinfo, outfile, NULL, size);
773
774    return (res);
775}
776
777
778/**
779 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
780 * by @p fout.
781 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
782 * @param fout The stream to write the file to.
783 * @param size The size of the file in bytes.
784 * @return 0 for success, nonzero for failure.
785 */
786int
787read_file_from_stream_to_stream(struct s_bkpinfo *bkpinfo, FILE * fout,
788                                long long size)
789{
790
791    /*@ int ******************************************************** */
792    int res;
793
794    /*@ end vars *************************************************** */
795
796    res = read_file_from_stream_FULL(bkpinfo, NULL, fout, size);
797    return (res);
798}
799
800
801/**
802 * Copy a file from the currently opened stream (CD or tape) to either a
803 * @c FILE pointer indicating a currently-opened file, or a filename indicating
804 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
805 * and read_file_from_stream_to_stream() are wrappers for.
806 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
807 * @param outfname If non-NULL, write to this file.
808 * @param foutstream If non-NULL, write to this stream.
809 * @param orig_size The original length of the file in bytes.
810 * @return 0 for success, nonzero for failure.
811 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
812 */
813int
814read_file_from_stream_FULL(struct s_bkpinfo *bkpinfo, char *outfname,
815                           FILE * foutstream, long long orig_size)
816{
817    /*@ buffers ***************************************************** */
818    char *tmp;
819    char *datablock;
820    char *temp_fname = (char *)bkpinfo; /* Should NOT be NULL */
821    char *temp_cksum = (char *)bkpinfo; /* Should NOT be NULL */
822    char *actual_cksum;
823
824    /*@ int ********************************************************* */
825    int retval = 0;
826#ifdef EXTRA_TAPE_CHECKSUMS
827    int i, ch;
828#endif
829    int noof_blocks;
830    int ctrl_chr;
831    int res;
832    /*@ pointers **************************************************** */
833    FILE *fout;
834
835    /*@ long    ***************************************************** */
836    long bytes_to_write = 0;
837
838    /*@ long long *************************************************** */
839    long long temp_size, size;
840    long bytes_read, bytes_to_read;
841    long long total_read_from_tape_for_this_file = 0;
842    long long where_I_was_before_tape_change = 0;
843    /*@ unsigned int ************************************************ */
844    unsigned int crc16;
845    unsigned int crctt;
846
847    bool had_to_resync = FALSE;
848
849    /*@ init  ******************************************************* */
850    datablock = malloc(TAPE_BLOCK_SIZE);
851    crc16 = 0;
852    crctt = 0;
853    size = orig_size;
854
855    /*@ end vars *************************************************** */
856
857    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
858    if (orig_size != temp_size && orig_size != -1) {
859        asprintf(&tmp,
860                 "output file's size should be %ld K but is apparently %ld K",
861                 (long) size >> 10, (long) temp_size >> 10);
862        log_to_screen(tmp);
863        paranoid_free(tmp);
864    }
865    if (ctrl_chr != BLK_START_FILE) {
866        wrong_marker(BLK_START_FILE, ctrl_chr);
867        return (1);
868    }
869    asprintf(&tmp, "Reading file from tape; writing to '%s'; %ld KB",
870             outfname, (long) size >> 10);
871    log_to_screen(tmp);
872    paranoid_free(tmp);
873
874    if (foutstream) {
875        fout = foutstream;
876    } else {
877        fout = fopen(outfname, "w");
878    }
879    if (!fout) {
880        log_OS_error(outfname);
881        log_to_screen(_("Cannot openout file"));
882        return (1);
883    }
884    total_read_from_tape_for_this_file = 0;
885    for (noof_blocks = 0; size > 0;
886         noof_blocks++, size -=
887         bytes_to_write, total_read_from_tape_for_this_file +=
888         bytes_read) {
889        bytes_to_write =
890            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
891        bytes_to_read = TAPE_BLOCK_SIZE;
892        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
893        while (bytes_read < bytes_to_read) {    // next tape!
894//    crctt=crc16=0;
895            where_I_was_before_tape_change = size;
896            log_msg(4, "where_I_was_... = %lld",
897                    where_I_was_before_tape_change);
898            start_to_read_from_next_tape(bkpinfo);
899            log_msg(4, "Started reading from next tape.");
900            skip_incoming_files_until_we_find_this_one(temp_fname);
901            log_msg(4, "Skipped irrelevant files OK.");
902            for (size = orig_size; size > where_I_was_before_tape_change;
903                 size -= bytes_to_write) {
904                bytes_read =
905                    fread(datablock, 1, bytes_to_read, g_tape_stream);
906            }
907            log_msg(4, "'size' is now %lld (should be %lld)", size,
908                    where_I_was_before_tape_change);
909            log_to_screen("Successfully re-sync'd tape");
910            had_to_resync = TRUE;
911            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
912        }
913
914        (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
915
916#ifdef EXTRA_TAPE_CHECKSUMS
917        for (i = 0; i < (int) bytes_to_write; i++) {
918            ch = datablock[i];
919            crc16 = updcrcr(crc16, (unsigned) ch);
920            crctt = updcrc(crctt, (unsigned) ch);
921        }
922#endif
923    }
924    log_msg(6, "Total read from tape for this file = %lld",
925            total_read_from_tape_for_this_file);
926    log_msg(6, ".......................... Should be %lld", orig_size);
927    g_tape_posK += total_read_from_tape_for_this_file / 1024;
928    asprintf(&actual_cksum, "%04x%04x", crc16, crctt);
929    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
930    } else {
931        paranoid_fclose(fout);
932    }
933    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
934    if (ctrl_chr != BLK_STOP_FILE) {
935        wrong_marker(BLK_STOP_FILE, ctrl_chr);
936//      fatal_error("Bad marker"); // return(1);
937    }
938    if (strcmp(temp_cksum, actual_cksum)) {
939        asprintf(&tmp, _("actual cksum=%s; recorded cksum=%s"), actual_cksum,
940                 temp_cksum);
941        log_to_screen(tmp);
942        paranoid_free(tmp);
943
944        asprintf(&tmp, _("%s (%ld K) is corrupt on tape"), temp_fname,
945                 (long) orig_size >> 10);
946        log_to_screen(tmp);
947        paranoid_free(tmp);
948        retval++;
949    }
950    paranoid_free(actual_cksum);
951    paranoid_free(datablock);
952    paranoid_free(temp_fname);
953    paranoid_free(temp_cksum);
954    return (retval);
955}
956
957
958/**
959 * Read a header block from the currently opened stream (CD or tape).
960 * This block indicates the length of the following file (if it's file-related)
961 * the filename (if it's file-related), and the block type.
962 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
963 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
964 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
965 * @return 0 for success, nonzero for failure.
966 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
967 */
968int
969read_header_block_from_stream(long long *plen, char *filename,
970                              int *pcontrol_char)
971{
972
973    /*@ buffers ***************************************************** */
974    char *tempblock;
975
976    /*@ int ********************************************************* */
977    int i, retval;
978
979    /*@ end vars *************************************************** */
980
981    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
982
983    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
984        tempblock[i] = 0;
985    }
986    while (!(*pcontrol_char = tempblock[7000])) {
987        g_tape_posK +=
988            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
989                  g_tape_stream) / 1024;
990    }
991    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
992    if (strcmp(tempblock + 6000 + *pcontrol_char, "Mondolicious, baby")) {
993        log_it("Bad header block at %ld K", (long) g_tape_posK);
994    }
995    /* the caller manages whether we should allocate or not
996     * by setting the value to NULL (do not allocate) or
997     * something (allocate) */
998    if (filename != NULL) {
999        asprintf(&filename, tempblock + 1000);
1000    }
1001    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1002        log_to_screen("I can't verify an aborted backup.");
1003        retval = 1;
1004    } else {
1005        retval = 0;
1006    }
1007    for (i = 1000; i < 1020; i++) {
1008        if (tempblock[i] < 32 || tempblock[i] > 126) {
1009            tempblock[i] = ' ';
1010        }
1011    }
1012    tempblock[i] = '\0';
1013    log_msg(6, "%s (fname=%s, size=%ld K)",
1014            marker_to_string(*pcontrol_char), tempblock + 1000,
1015            (long) (*plen) >> 10);
1016    paranoid_free(tempblock);
1017    return (retval);
1018}
1019
1020
1021/**
1022 * Add specified file/slice to the internal catalog of all archives written.
1023 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1024 * write the last [buffer size] MB from the catalog to the new tape, so we know
1025 * we have @e all archives on some CD/tape/whatever.
1026 * @param type The type of file we're cataloging (afioball, slice, something else)
1027 * @param number The fileset number or biggiefile number.
1028 * @param aux The slice number if it's a biggiefile, or any other additional info.
1029 * @param fn The original full pathname of the file we're recording.
1030 * @return The index of the record we just added.
1031 */
1032int register_in_tape_catalog(t_archtype type, int number, long aux,
1033                             char *fn)
1034{
1035    int last;
1036    char fname[MAX_TAPECAT_FNAME_LEN];
1037    char *p;
1038
1039    p = strrchr(fn, '/');
1040    if (p) {
1041        p++;
1042    } else {
1043        p = fn;
1044    }
1045    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1046    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1047    last = g_tapecatalog->entries;
1048    if (last >= MAX_TAPECATALOG_ENTRIES) {
1049        log_it
1050            ("Warning - can't log #%d in tape catalog - too many entries already",
1051             number);
1052        return (-1);
1053    }
1054    g_tapecatalog->el[last].type = type;
1055    g_tapecatalog->el[last].number = number;
1056    g_tapecatalog->el[last].aux = aux;
1057    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1058    strcpy(g_tapecatalog->el[last].fname, fname);
1059    g_tapecatalog->entries++;
1060    return (last);              // returns the index of the record we've jsut added
1061}
1062
1063
1064/**
1065 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1066 * (got SIGPIPE) or look like we will.
1067 * @param mediasize The size of the tape in megabytes.
1068 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1069 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1070 * autodetecting the size. Huh?
1071 */
1072
1073/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1074bool
1075should_we_write_to_next_tape(long mediasize,
1076                             off_t length_of_incoming_file)
1077{
1078    /*@ bool's ***************************************************** */
1079    bool we_need_a_new_tape = FALSE;
1080
1081    /*@ end vars *************************************************** */
1082
1083    if (mediasize == 0) {
1084        return (FALSE);
1085    }
1086    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1087        log_it("mediasize = %ld", mediasize);
1088        we_need_a_new_tape = TRUE;
1089        log_to_screen(_("Should have started a new tape/CD already"));
1090    }
1091    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1092        mediasize - (SLICE_SIZE * 4 / 1024)) {
1093        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1094               mediasize);
1095        we_need_a_new_tape = TRUE;
1096    }
1097    return (we_need_a_new_tape);
1098}
1099
1100
1101/**
1102 * Seek through the stream until we find a header block where the NAME field matches
1103 * @p the_file_I_was_reading. This is useful if you've just started reading from
1104 * a new tape and want to find the file you were reading when the tape ended.
1105 * @param the_file_I_was_reading File name to look for.
1106 * @return 0 for success, nonzero for failure.
1107 */
1108int skip_incoming_files_until_we_find_this_one(char
1109                                               *the_file_I_was_reading)
1110{
1111    char *pA;
1112    char *pB;
1113    int res;
1114    int ctrl_chr;
1115    char *temp_fname = (char *)&res;    /* should NOT be NULL */
1116    char *datablock;
1117    long long temp_size, size;
1118    long bytes_to_write;
1119
1120    datablock = malloc(TAPE_BLOCK_SIZE);
1121    pB = strrchr(the_file_I_was_reading, '/');
1122    if (pB) {
1123        pB++;
1124    } else {
1125        pB = the_file_I_was_reading;
1126    }
1127    log_msg(1, "skip_incoming_..(%s)", pB);
1128    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1129    ctrl_chr = -1;
1130    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1131        res =
1132            read_header_block_from_stream(&temp_size, temp_fname,
1133                                          &ctrl_chr);
1134        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1135            break;
1136        }
1137        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1138        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1139        log_msg(3, "Still trying to re-sync w/ tape");
1140        paranoid_free(temp_fname);
1141        temp_fname = (char *)&res;
1142    }
1143    while (ctrl_chr != BLK_START_FILE) {
1144        res =
1145            read_header_block_from_stream(&temp_size, temp_fname,
1146                                          &ctrl_chr);
1147        if (ctrl_chr == BLK_START_FILE) {
1148            break;
1149        }
1150        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1151        wrong_marker(BLK_START_FILE, ctrl_chr);
1152        log_msg(3, "Still trying to re-sync w/ tape");
1153        /* Do not desallocate when the while condition is met */
1154        if (ctrl_chr != BLK_START_FILE) {
1155            paranoid_free(temp_fname);
1156            temp_fname = (char *)&res;
1157        }
1158    }
1159    pA = strrchr(temp_fname, '/');
1160    if (pA) {
1161        pA++;
1162    } else {
1163        pA = temp_fname;
1164    }
1165    pB = strrchr(the_file_I_was_reading, '/');
1166    if (pB) {
1167        pB++;
1168    } else {
1169        pB = the_file_I_was_reading;
1170    }
1171    while (strcmp(pA, pB)) {
1172        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1173                the_file_I_was_reading);
1174        for (size = temp_size; size > 0; size -= bytes_to_write) {
1175            bytes_to_write =
1176                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1177            // FIXME - needs error-checking and -catching
1178            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1179        }
1180
1181        paranoid_free(temp_fname);
1182        temp_fname = (char *)&res;
1183        res = read_header_block_from_stream(&temp_size, NULL, &ctrl_chr);
1184        if (ctrl_chr != BLK_STOP_FILE) {
1185            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1186        }
1187        res = read_header_block_from_stream(&temp_size, NULL, &ctrl_chr);
1188        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1189            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1190        }
1191        res = read_header_block_from_stream(&temp_size, NULL, &ctrl_chr);
1192        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1193            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1194        }
1195        res =
1196            read_header_block_from_stream(&temp_size, temp_fname,
1197                                          &ctrl_chr);
1198        if (ctrl_chr != BLK_START_FILE) {
1199            wrong_marker(BLK_START_FILE, ctrl_chr);
1200        }
1201        pA = strrchr(temp_fname, '/');
1202        if (pA) {
1203            pA++;
1204        } else {
1205            pA = temp_fname;
1206        }
1207        /* BERLIOS: useless ?
1208           pB = strrchr(the_file_I_was_reading, '/');
1209           if (pB) {
1210           pB++;
1211           } else {
1212           pB = the_file_I_was_reading;
1213           }
1214         */
1215    }
1216    log_msg(2, "Reading %s (it matches %s)", temp_fname,
1217            the_file_I_was_reading);
1218    paranoid_free(temp_fname);
1219    paranoid_free(datablock);
1220    return (0);
1221}
1222
1223
1224/**
1225 * Start to read from the next tape. Assumes the user has already inserted it.
1226 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1227 * @return 0 for success, nonzero for failure.
1228 */
1229int start_to_read_from_next_tape(struct s_bkpinfo *bkpinfo)
1230{
1231    /*@ int ********************************************************* */
1232    int res = 0;
1233    int ctrlchr;
1234    long long temp_size;
1235    /*@ end vars *************************************************** */
1236
1237    paranoid_pclose(g_tape_stream);
1238    sync();
1239    sync();
1240    sync();
1241    log_it("Next tape requested.");
1242    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1243    log_it("Opening IN the next tape");
1244    if (!
1245        (g_tape_stream =
1246         open_device_via_buffer(bkpinfo->media_device, 'r',
1247                                bkpinfo->internal_tape_block_size))) {
1248        log_OS_error(g_tape_fifo);
1249        log_to_screen(_("Cannot openin stream device"));
1250        return (1);
1251    }
1252    g_tape_posK = 0;
1253    g_sigpipe = FALSE;
1254    res += read_header_block_from_stream(&temp_size, NULL, &ctrlchr);   /* just in case */
1255    if (ctrlchr != BLK_START_OF_TAPE) {
1256        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1257    }
1258    res += read_header_block_from_stream(&temp_size, NULL, &ctrlchr);   /* just in case */
1259    if (ctrlchr != BLK_START_OF_BACKUP) {
1260        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1261    } else {
1262        log_msg(3, "Next tape opened OK. Whoopee!");
1263    }
1264    return (res);
1265}
1266
1267
1268/**
1269 * Start to write to the next tape. Assume the user has already inserted it.
1270 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1271 * @return 0 for success, nonzero for failure.
1272 */
1273int start_to_write_to_next_tape(struct s_bkpinfo *bkpinfo)
1274{
1275    int res = 0;
1276    char *command;
1277
1278    paranoid_pclose(g_tape_stream);
1279    sync();
1280    sync();
1281    sync();
1282    log_it("New tape requested.");
1283    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1284    if (g_current_media_number > MAX_NOOF_MEDIA) {
1285        res++;
1286        log_to_screen(_("Too many tapes. Man, you need to use nfs!"));
1287    }
1288    if (bkpinfo->backup_media_type == cdstream) {
1289        asprintf(&command,
1290                 "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1291                 bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE,
1292                 MONDO_LOGFILE);
1293        log_it("Opening OUT to next CD with the command");
1294        log_it(command);
1295        log_it("Let's see what happens, shall we?");
1296        g_tape_stream = popen(command, "w");
1297        paranoid_free(command);
1298        if (!g_tape_stream) {
1299            log_to_screen(_("Failed to openout to cdstream (fifo)"));
1300            return (1);
1301        }
1302    } else {
1303        log_it("Opening OUT to next tape");
1304        if (!
1305            (g_tape_stream =
1306             open_device_via_buffer(bkpinfo->media_device, 'w',
1307                                    bkpinfo->internal_tape_block_size))) {
1308            log_OS_error(g_tape_fifo);
1309            log_to_screen(_("Cannot openin stream device"));
1310            return (1);
1311        }
1312    }
1313    g_tape_posK = 0;
1314    g_sigpipe = FALSE;
1315    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1316    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1317    return (res);
1318}
1319
1320
1321/**
1322 * Write a bufferfull of the most recent archives to the tape. The
1323 * rationale behind this is a bit complex. If the previous tape ended
1324 * suddenly (EOF or otherwise) some archives were probably left in the
1325 * buffer. That means that Mondo thinks they have been written, but
1326 * the external binary @c buffer has not actually written them. So to
1327 * be safe, we start the new tape by writing the last bufferfull from
1328 * the old one. This insures that all archives will be on at least
1329 * one tape. Sounds inelegant, but it works.
1330 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1331 * @return 0 for success, nonzero for failure.
1332 */
1333int write_backcatalog_to_tape(struct s_bkpinfo *bkpinfo)
1334{
1335    int i, last, res = 0;
1336    char *fname;
1337
1338    log_msg(2, "I am now writing back catalog to tape");
1339    last = g_tapecatalog->entries - 1;
1340    for (i = 0; i <= last; i++) {
1341        asprintf(&fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir,
1342                 g_tapecatalog->el[i].fname);
1343        if (!does_file_exist(fname)) {
1344            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1345        } else {
1346            write_header_block_to_stream(length_of_file(fname),
1347                                         "start-backcatalog-afio-or-slice",
1348                                         BLK_START_AN_AFIO_OR_SLICE);
1349            log_msg(2, "Writing %s", fname);
1350            if (write_file_to_stream_from_file(bkpinfo, fname)) {
1351                res++;
1352                log_msg(2, "%s failed", fname);
1353            }
1354            if (i != last) {
1355                write_header_block_to_stream((off_t)0,
1356                                             "stop-backcatalog-afio-or-slice",
1357                                             BLK_STOP_AN_AFIO_OR_SLICE);
1358            }
1359        }
1360        paranoid_free(fname);
1361    }
1362    log_msg(2, "Finished writing back catalog to tape");
1363    return (res);
1364}
1365
1366
1367/**
1368 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1369 * @param fname The path to all.tar.gz.
1370 * @return 0 for success, nonzero for failure.
1371 */
1372int write_data_disks_to_stream(char *fname)
1373{
1374    /*@ pointers *************************************************** */
1375    FILE *fin;
1376    char *tmp;
1377
1378    /*@ long ******************************************************* */
1379    long m = -1;
1380    long templong;
1381
1382    /*@ int ******************************************************** */
1383    int i, j;
1384
1385    /*@ buffers **************************************************** */
1386    char tempblock[256 * 1024];
1387
1388    /*@ end vars *************************************************** */
1389
1390    open_evalcall_form(_("Writing data disks to tape"));
1391    log_to_screen(_("Writing data disks to tape"));
1392    log_it("Data disks = %s", fname);
1393    if (!does_file_exist(fname)) {
1394        asprintf(&tmp, _("Cannot find %s"), fname);
1395        log_to_screen(tmp);
1396        paranoid_free(tmp);
1397        return (1);
1398    }
1399    if (!(fin = fopen(fname, "r"))) {
1400        log_OS_error(fname);
1401        fatal_error("Cannot openin the data disk");
1402    }
1403    for (i = 0; i < 32; i++) {  /* 32MB */
1404        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1405            if (!feof(fin)) {
1406                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1407            } else {
1408                m = 0;
1409            }
1410            for (; m < 256 * 1024; m++) {
1411                tempblock[m] = '\0';
1412            }
1413            g_tape_posK +=
1414                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1415        }
1416        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1417        {
1418            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1419            update_evalcall_form((int) (templong));
1420        }
1421    }
1422    paranoid_fclose(fin);
1423    close_evalcall_form();
1424    return (0);
1425}
1426
1427
1428/**
1429 * Copy @p infile to the opened stream (CD or tape).
1430 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1431 * @param infile The file to write to the stream.
1432 * @return 0 for success, nonzero for failure.
1433 */
1434int write_file_to_stream_from_file(struct s_bkpinfo *bkpinfo, char *infile)
1435{
1436    /*@ buffers **************************************************** */
1437    char *tmp;
1438    char datablock[TAPE_BLOCK_SIZE];
1439    char *checksum;
1440    char *infile_basename;
1441
1442    /*@ int ******************************************************** */
1443    int retval = 0;
1444    int noof_blocks;
1445
1446    /*  unsigned int ch; */
1447    unsigned int crc16;
1448    unsigned int crctt;
1449
1450    /*@ pointers *************************************************** */
1451    FILE *fin;
1452    char *p;
1453
1454    /*@ long ******************************************************* */
1455    long bytes_to_read = 0;
1456    long i;
1457
1458    off_t filesize;
1459
1460#ifdef EXTRA_TAPE_CHECKSUMS
1461    int ch;
1462#endif
1463
1464    /*@ initialize ************************************************ */
1465    crc16 = 0;
1466    crctt = 0;
1467
1468    /*@ end vars *************************************************** */
1469
1470    infile_basename = strrchr(infile, '/');
1471    if (infile_basename) {
1472        infile_basename++;
1473    } else {
1474        infile_basename = infile;
1475    }
1476    filesize = length_of_file(infile);
1477    if (should_we_write_to_next_tape
1478        (bkpinfo->media_size[g_current_media_number], filesize)) {
1479        start_to_write_to_next_tape(bkpinfo);
1480        write_backcatalog_to_tape(bkpinfo);
1481    }
1482    p = strrchr(infile, '/');
1483    if (!p) {
1484        p = infile;
1485    } else {
1486        p++;
1487    }
1488    asprintf(&tmp, "Writing file '%s' to tape (%ld KB)", p,
1489             (long) filesize >> 10);
1490    log_it(tmp);
1491    paranoid_free(tmp);
1492
1493    write_header_block_to_stream(filesize, infile_basename,
1494                                 BLK_START_FILE);
1495//go_here_to_restart_saving_of_file:
1496    if (!(fin = fopen(infile, "r"))) {
1497        log_OS_error(infile);
1498        return (1);
1499    }
1500    for (noof_blocks = 0; filesize > 0;
1501         noof_blocks++, filesize -= bytes_to_read) {
1502        if (filesize < TAPE_BLOCK_SIZE) {
1503            bytes_to_read = (long) filesize;
1504            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1505                datablock[i] = '\0';
1506            }
1507        } else {
1508            bytes_to_read = TAPE_BLOCK_SIZE;
1509        }
1510        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1511        g_tape_posK += fwrite(datablock, 1, /*bytes_to_read */
1512                              (size_t) TAPE_BLOCK_SIZE,
1513                              g_tape_stream) / 1024;
1514        if (g_sigpipe) {
1515            iamhere("Sigpipe occurred recently. I'll start a new tape.");
1516            fclose(fin);
1517            g_sigpipe = FALSE;
1518            start_to_write_to_next_tape(bkpinfo);
1519            write_backcatalog_to_tape(bkpinfo); // kinda-sorta recursive :)
1520            return (0);
1521        }
1522#ifdef EXTRA_TAPE_CHECKSUMS
1523        for (i = 0; i < bytes_to_read; i++) {
1524            ch = datablock[i];
1525            crc16 = updcrcr(crc16, (unsigned) ch);
1526            crctt = updcrc(crctt, (unsigned) ch);
1527        }
1528#endif
1529    }
1530    paranoid_fclose(fin);
1531    asprintf(&checksum, "%04x%04x", crc16, crctt);
1532    /* BERLIOS: what does it do ??? */
1533    write_header_block_to_stream((off_t)g_current_media_number, checksum,
1534                                 BLK_STOP_FILE);
1535    paranoid_free(checksum);
1536//  log_it("File '%s' written to tape.", infile);
1537    return (retval);
1538}
1539
1540
1541/**
1542 * Write a header block to the opened stream (CD or tape).
1543 * @param length_of_incoming_file The length to store in the header block.
1544 * Usually matters only if this is a file-related header, in which case it should
1545 * be the length of the file that will follow.
1546 * @param filename The filename to store in the header block. Usually matters
1547 * only if this is a file-related header, in which case this should be the name
1548 * if the file that will follow.
1549 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1550 * @return 0 for success, nonzero for failure.
1551 */
1552int
1553write_header_block_to_stream(off_t length_of_incoming_file,
1554                             char *filename, int control_char)
1555{
1556    /*@ buffers **************************************************** */
1557    char tempblock[TAPE_BLOCK_SIZE];
1558    char *tmp;
1559    char *p;
1560
1561    /*@ int ******************************************************** */
1562    int i;
1563
1564    off_t olen;
1565
1566    /*@ end vars *************************************************** */
1567
1568
1569    olen = length_of_incoming_file;
1570    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1571    if (!p) {
1572        p = filename;
1573    } else {
1574        p++;
1575    }
1576    if (!g_tape_stream) {
1577        log_to_screen
1578            (_("You're not backing up to tape. Why write a tape header?"));
1579        return (1);
1580    }
1581    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1582        tempblock[i] = 0;
1583    }
1584    sprintf(tempblock + 6000 + control_char, "Mondolicious, baby");
1585    tempblock[7000] = control_char;
1586    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1587    strcpy(tempblock + 1000, filename);
1588    g_tape_posK +=
1589        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1590               g_tape_stream) / 1024;
1591    asprintf(&tmp, "%s (fname=%s, size=%ld K)",
1592             marker_to_string(control_char), p,
1593             (long) length_of_incoming_file >> 10);
1594    log_msg(6, tmp);
1595    paranoid_free(tmp);
1596    return (0);
1597}
1598
1599
1600/**
1601 * Log (to screen) an erroneous marker, along with what it should have been.
1602 * @param should_be What we were expecting.
1603 * @param it_is What we got.
1604 */
1605void wrong_marker(int should_be, int it_is)
1606{
1607    /*@ buffer ***************************************************** */
1608    char *tmp;
1609
1610
1611    /*@ end vars *************************************************** */
1612    asprintf(&tmp, _("Wrong marker! (Should be %s, is actually %s)"),
1613             marker_to_string(should_be), marker_to_string(it_is));
1614    log_to_screen(tmp);
1615    paranoid_free(tmp);
1616}
1617
1618/* @} - end of streamGroup */
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