source: branches/2.2.9/mondo/src/common/libmondo-stream.c @ 2520

Last change on this file since 2520 was 2520, checked in by bruno, 9 years ago

r3230@localhost (orig r2264): bruno | 2009-07-12 02:04:37 +0200

r3205@localhost: bruno | 2009-07-06 19:46:07 +0200

  • Replace sprintf by mr_asprintf in libmondo-stream.c


  • Property svn:keywords set to Id
File size: 51.3 KB
Line 
1/* libmondo-stream.c
2   $Id: libmondo-stream.c 2520 2010-01-04 18:42:27Z bruno $
3
4...tools for talking to tapes, Monitas streams, etc.
5
6*/
7
8
9/**
10 * @file
11 * Functions for writing data to/reading data from streams (tape, CD stream, etc.)
12 */
13
14#include "my-stuff.h"
15#include "mr_mem.h"
16#include "mondostructures.h"
17#include "libmondo-devices.h"
18#include "lib-common-externs.h"
19#include "libmondo-stream.h"
20#include "libmondo-string-EXT.h"
21#include "libmondo-files-EXT.h"
22#include "libmondo-gui-EXT.h"
23#include "libmondo-fork-EXT.h"
24#include "libmondo-tools-EXT.h"
25#include "libmondo-fifo-EXT.h"
26
27#define EXTRA_TAPE_CHECKSUMS
28#define STR_HEADER  "Mondolicious, baby"
29
30/*@unused@*/
31//static char cvsid[] = "$Id: libmondo-stream.c 2520 2010-01-04 18:42:27Z bruno $";
32extern bool g_sigpipe;
33extern int g_tape_buffer_size_MB;
34
35extern char *g_getfacl;
36extern char *g_getfattr;
37extern char *MONDO_LOGFILE;
38
39/* Reference to global bkpinfo */
40extern struct s_bkpinfo *bkpinfo;
41
42/**
43 * @addtogroup globalGroup
44 * @{
45 */
46/**
47 * The file pointer for the opened tape/CD stream.
48 * Opened and closed by openin_tape(), openin_cdstream(),
49 * openout_tape(), openout_cdstream(), closein_tape(), closein_cdstream(),
50 * closeout_tape(), and closeout_cdstream().
51 */
52FILE *g_tape_stream = NULL;
53
54
55/**
56 * The position (in kilobytes) where we are on the tape.
57 */
58long long g_tape_posK = 0;
59
60/**
61 * The current media number we're using. This value is 1-based.
62 */
63int g_current_media_number = -1;
64
65/**
66 * The tape catalog that keeps track of files written to tape.
67 */
68struct s_tapecatalog *g_tapecatalog;
69
70/* @} - end of globalGroup */
71
72int write_backcatalog_to_tape();
73
74
75
76
77
78/**
79 * @addtogroup streamGroup
80 * @{
81 */
82/**
83 * Close the global output file descriptor which Mondo has used to read
84 * from the CD stream.
85 * @param bkpinfo The backup information structure. Passed directly to closein_tape().
86 * @return 0 for success, nonzero for failure.
87 * @note This should be called by restore processes only.
88 */
89int closein_cdstream()
90{
91    return (closein_tape());
92}
93
94
95/**
96 * Close the global output file descriptor which Mondo has used to read
97 * from buffer or dd, which read from the tape.
98 * @param bkpinfo The backup information structure. Unused.
99 * @return 0 for success, nonzero for failure.
100 * @note This should be called by restore processes only.
101 * @note This function also works for cdstreams for now, but don't count on this behavior.
102 * @bug @p bkpinfo parameter is unused.
103 */
104int closein_tape()
105{
106    /*@ int's ******************************************************* */
107    int retval = 0;
108    int res = 0;
109    int ctrl_chr = '\0';
110
111    /*@ buffers ***************************************************** */
112    char fname[MAX_STR_LEN];
113
114    /*@ long long's ************************************************* */
115    long long size;
116    char *blk;
117    int i;
118
119    blk = (char *) malloc(256 * 1024);
120
121    log_it("closein_tape() -- entering");
122    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
123    retval += res;
124    if (ctrl_chr != BLK_END_OF_BACKUP) {
125        wrong_marker(BLK_END_OF_BACKUP, ctrl_chr);
126    }
127    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
128    retval += res;
129    if (ctrl_chr != BLK_END_OF_TAPE) {
130        wrong_marker(BLK_END_OF_TAPE, ctrl_chr);
131    }
132    for (i = 0; i < 8 && !feof(g_tape_stream); i++) {
133        (void) fread(blk, 1, 256 * 1024, g_tape_stream);
134    }
135    sleep(1);
136    paranoid_system("sync");
137    sleep(1);
138    paranoid_pclose(g_tape_stream);
139    log_it("closein_tape() -- leaving");
140/*
141  for(i=0; i < g_tapecatalog->entries; i++)
142    {
143      log_it("i=%d type=%s num=%d aux=%ld", i, (g_tapecatalog->el[i].type==fileset)?"fileset":"bigslice", g_tapecatalog->el[i].number, g_tapecatalog->el[i].aux);
144    }
145*/
146    if (!bkpinfo->please_dont_eject) {
147        eject_device(bkpinfo->media_device);
148    }
149    paranoid_free(blk);
150    paranoid_free(g_tapecatalog);
151    return (retval);
152}
153
154
155
156/**
157 * Close the global output file descriptor which Mondo has been using to write
158 * to the tape device (via buffer or dd).
159 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
160 * @return 0 for success, nonzero for failure.
161 * @note This should be called by backup processes only.
162 */
163int closeout_tape()
164{
165    /*@ int's ******************************************************* */
166    int retval = 0;
167//  int res = 0;
168//  int ctrl_chr = '\0';
169
170    /*@ buffers ***************************************************** */
171//  char fname[MAX_STR_LEN];
172
173    /*@ long long's ************************************************* */
174//  long long size;
175    int i;
176    char *blk;
177
178    blk = (char *) malloc(256 * 1024);
179
180    sleep(1);
181    paranoid_system("sync");
182    sleep(1);
183    log_it("closeout_tape() -- entering");
184    retval +=
185        write_header_block_to_stream((off_t)0, "end-of-backup",
186                                     BLK_END_OF_BACKUP);
187    retval += write_header_block_to_stream((off_t)0, "end-of-tape", BLK_END_OF_TAPE);   /* just in case */
188/* write 1MB of crap */
189    for (i = 0; i < 256 * 1024; i++) {
190        blk[i] = (int) (random() & 0xFF);
191    }
192    for (i = 0; i < 4 * 8; i++) {
193        (void) fwrite(blk, 1, 256 * 1024, g_tape_stream);
194        if (should_we_write_to_next_tape
195            (bkpinfo->media_size[g_current_media_number], (off_t)256 * 1024)) {
196            start_to_write_to_next_tape();
197        }
198    }
199/* write 1MB of zeroes */
200/*
201    for (i = 0; i < 256*1024; i++)
202      {
203        blk[i] = 0;
204      }
205    for (i = 0; i < 4; i++)
206      {
207        fwrite (blk, 1, 256*1024, g_tape_stream);
208        if (should_we_write_to_next_tape (bkpinfo->media_size[g_current_media_number], 256*1024))
209          {
210            start_to_write_to_next_tape ();
211          }
212      }
213*/
214    sleep(2);
215    paranoid_pclose(g_tape_stream);
216    log_it("closeout_tape() -- leaving");
217    for (i = 0; i < g_tapecatalog->entries; i++) {
218        log_it("i=%d type=%s num=%d aux=%ld posK=%lld", i,
219               (g_tapecatalog->el[i].type ==
220                fileset) ? "fileset" : "bigslice",
221               g_tapecatalog->el[i].number, g_tapecatalog->el[i].aux,
222               g_tapecatalog->el[i].tape_posK);
223    }
224    //  if (!bkpinfo->please_dont_eject)
225    //    { eject_device(bkpinfo->media_device); }
226    paranoid_free(blk);
227    paranoid_free(g_tapecatalog);
228    return (retval);
229}
230
231
232
233bool mt_says_tape_exists(char *dev)
234{
235    char *command = NULL;
236    int res;
237
238    mr_asprintf(&command, "mt -f %s status", dev);
239    res = run_program_and_log_output(command, 1);
240    mr_free(command);
241
242    if (res) {
243        return (FALSE);
244    } else {
245        return (TRUE);
246    }
247}
248
249
250
251/**
252 * Determine the name and size of the tape device. Tries the SCSI tape for
253 * this platform, then the IDE tape, then "/dev/st0", then "/dev/osst0".
254 * @param dev Where to put the found tape device.
255 * @param siz Where to put the tape size (a string like "4GB")
256 * @return 0 if success, nonzero if failure (in which @p dev and @p siz are undefined).
257 */
258int find_tape_device_and_size(char *dev, char *siz)
259{
260    char tmp[MAX_STR_LEN];
261    char *command = NULL;
262    char cdr_exe[MAX_STR_LEN];
263    int res;
264
265    log_to_screen("I am looking for your tape streamer. Please wait.");
266    dev[0] = siz[0] = '\0';
267    if (find_home_of_exe("cdrecord")) {
268        strcpy(cdr_exe, "cdrecord");
269    } else {
270        strcpy(cdr_exe, "dvdrecord");
271    }
272    mr_asprintf(&command, "%s -scanbus 2> /dev/null | grep -i tape | wc -l",
273            cdr_exe);
274    strcpy(tmp, call_program_and_get_last_line_of_output(command));
275    mr_free(command);
276
277    if (atoi(tmp) != 1) {
278        log_it
279            ("Either too few or too many tape streamers for me to detect...");
280        strcpy(dev, VANILLA_SCSI_TAPE);
281        return 1;
282    }
283    mr_asprintf(&command,
284            "%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",
285            cdr_exe);
286    strcpy(tmp, call_program_and_get_last_line_of_output(command));
287    mr_free(command);
288
289    if (strlen(tmp) < 2) {
290        log_it("Could not find tape device");
291        return 1;
292    }
293    mr_asprintf(&command,
294            "%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",
295            cdr_exe);
296    strcpy(tmp, call_program_and_get_last_line_of_output(command));
297    mr_free(command);
298
299    strcpy(dev, VANILLA_SCSI_TAPE);
300    dev[strlen(dev) - 1] = '\0';
301    strcat(dev, tmp);           // e.g. '/dev/st0' becomes '/dev/stN'
302    res = 0;
303    if (!mt_says_tape_exists(dev)) {
304        strcpy(dev, ALT_TAPE);
305        if (!mt_says_tape_exists(dev)) {
306            log_it("Cannot openin %s", dev);
307            strcpy(dev, "/dev/st0");
308            if (!mt_says_tape_exists(dev)) {
309                log_it("Cannot openin %s", dev);
310                strcpy(dev, "/dev/osst0");
311                if (!mt_says_tape_exists(dev)) {
312                    res++;
313                } else {
314                    res = 0;
315                }
316            }
317        }
318    }
319
320    log_it("At this point, dev = %s and res = %d", dev, res);
321
322    strcpy(tmp, call_program_and_get_last_line_of_output("\
323cdrecord -scanbus 2> /dev/null | tr -s '\t' ' ' | \
324grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | \
325awk '{for(i=1; i<NF; i++) { if (index($i, \"GB\")>0) { print $i;};};};'"));
326
327    if (mt_says_tape_exists(dev)) {
328        res = 0;
329    } else {
330        log_it("Turning %s", dev);
331        strcpy(tmp, (strrchr(dev, '/') != NULL) ? strrchr(dev, '/') : dev);
332        sprintf(dev, "/dev/os%s", tmp);
333        log_it("...into %s", dev);
334        if (mt_says_tape_exists(dev)) {
335            res = 0;
336        } else {
337            res++;
338        }
339    }
340
341    siz[0] = '\0';
342    log_it("res=%d; dev=%s", res, dev);
343
344    if (res) {
345        return (res);
346    }
347
348    if (strlen(tmp) < 2) {
349        siz[0] = '\0';
350        log_it("Warning - size of tape unknown");
351        return (0);
352    } else {
353        strcpy(siz, tmp);
354        return (0);
355    }
356}
357
358
359
360
361
362
363int read_EXAT_files_from_tape(long long *ptmp_size, char *tmp_fname,
364                              int *pctrl_chr, char *xattr_fname,
365                              char *acl_fname)
366{
367    int res = 0;
368    char *fname = (char *)&res;                 /* Should NOT be NULL */
369    char *tmp = NULL;
370
371    // xattr
372    if (g_getfattr) {
373        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
374        if (*pctrl_chr != BLK_START_EXAT_FILE) {
375            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
376        }
377        if (strstr(fname, "xattr") == NULL) {
378            mr_asprintf(&tmp,"Wrong order expected xattr, got %s, sunshine.", fname);
379            fatal_error(tmp);
380        }
381        read_file_from_stream_to_file(xattr_fname, *ptmp_size);
382        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
383        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
384            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
385        }
386        log_msg(1, "Got xattr");
387        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
388        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
389            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
390        }
391        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
392        if (*pctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
393            log_msg(1, "No acl attributes found, skipping to afio files");
394            return(0);
395        } else {
396            if (*pctrl_chr != BLK_START_EXTENDED_ATTRIBUTES) {
397                wrong_marker(BLK_START_EXTENDED_ATTRIBUTES, *pctrl_chr);
398            }
399        }
400    }
401    // acl
402    if (g_getfacl) {
403        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
404        if (*pctrl_chr != BLK_START_EXAT_FILE) {
405            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
406        }
407        if (strstr(fname, "acl") == NULL) {
408            mr_asprintf(&tmp,"Wrong order expected acl, got %s, sunshine.", fname);
409            fatal_error(tmp);
410        }
411        read_file_from_stream_to_file(acl_fname, *ptmp_size);
412        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
413        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
414            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
415        }
416        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
417        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
418            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
419        }
420        log_msg(1, "Got acl");
421    }
422    // tarball itself
423    res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
424    log_msg(1, "End of extended attributes, now looking for afioball");
425    return (0);
426}
427
428
429int write_EXAT_files_to_tape(char *xattr_fname,
430                             char *acl_fname)
431{
432    int res = 0;
433    if (g_getfattr) {
434    // xattr
435        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
436                             BLK_START_EXTENDED_ATTRIBUTES);
437        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
438                             BLK_START_EXAT_FILE);
439        write_file_to_stream_from_file(xattr_fname);
440        write_header_block_to_stream((off_t)-1, xattr_fname, BLK_STOP_EXAT_FILE);
441        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
442                             BLK_STOP_EXTENDED_ATTRIBUTES);
443    }
444    if (g_getfacl) {
445    // acl
446        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
447                             BLK_START_EXTENDED_ATTRIBUTES);
448        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
449                             BLK_START_EXAT_FILE);
450        write_file_to_stream_from_file(acl_fname);
451        write_header_block_to_stream((off_t)-1, acl_fname, BLK_STOP_EXAT_FILE);
452        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
453                             BLK_STOP_EXTENDED_ATTRIBUTES);
454    }
455    return (res);
456}
457
458
459
460
461/**
462 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
463 * @param tapeno The tape number to insist on.
464 * @bug There is currently no way to actually verify that the user has actually
465 * inserted the right tape.
466 */
467void insist_on_this_tape_number(int tapeno)
468{
469    int i;
470    char *tmp = NULL;
471
472    log_it("Insisting on tape #%d", tapeno);
473    if (g_current_media_number != tapeno) {
474        mr_asprintf(&tmp,
475                "When the tape drive goes quiet, please insert volume %d in this series.",
476                tapeno);
477        popup_and_OK(tmp);
478        mr_free(tmp);
479        open_evalcall_form("Waiting while the tape drive settles");
480    } else {
481        open_evalcall_form("Waiting while the tape drive rewinds");
482    }
483
484    for (i = 0; i <= 100; i += 2) {
485        usleep(100000);
486        update_evalcall_form(i);
487    }
488    close_evalcall_form();
489    log_it("I assume user has inserted it. They _say_ they have...");
490    g_current_media_number = tapeno;
491
492    //  log_it("g_current_media_number = %d", g_current_media_number);
493    log_it("OK, I've finished insisting. On with the revelry.");
494}
495
496
497
498
499/**
500 * Debugging aid - log the offset we're at on the tape (reading or writing).
501 */
502void log_tape_pos(void)
503{
504    /*@ buffers ***************************************************** */
505
506
507    /*@ end vars *************************************************** */
508
509    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
510           (long) g_tape_posK >> 10);
511}
512
513
514
515
516/**
517 * Add a file to a collection of recently archived filesets/slices.
518 * The type is determined by the filename: if it contains ".afio." it is
519 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
520 * otherwise we generate a fatal_error().
521 * @param td The current @c bkpinfo->tempdir (file will be placed in <tt>td</tt>/tmpfs/backcatalog/).
522 * @param latest_fname The file to place in the collection.
523 * @return 0, always.
524 * @bug Return value is redundant.
525 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
526 */
527int maintain_collection_of_recent_archives(char *td, char *latest_fname)
528{
529    long long final_alleged_writeK, final_projected_certain_writeK,
530        final_actually_certain_writeK = 0, cposK, bufsize_K;
531    int last, curr, i;
532    t_archtype type = other;
533    char *command = NULL;
534    char *tmpdir = NULL;
535    char *old_fname = NULL;
536    char *p;
537    char suffix[16];
538
539    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
540    if ((p = strrchr(latest_fname, '.'))) {
541        strcpy(suffix, ++p);
542    } else {
543        suffix[0] = '\0';
544    }
545    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
546        type = fileset;
547    } else if (strstr(latest_fname, "slice")) {
548        type = biggieslice;
549    } else {
550        log_it("fname = %s", latest_fname);
551        fatal_error
552            ("Unknown type. Internal error in maintain_collection_of_recent_archives()");
553    }
554    mr_asprintf(&tmpdir, "%s/tmpfs/backcatalog", td);
555    mkdir(tmpdir, 0x700);
556    mr_asprintf(&command, "cp -f %s %s", latest_fname, tmpdir);
557    if (run_program_and_log_output(command, 6)) {
558        log_it("Warning - failed to copy %s to backcatalog at %s",
559               latest_fname, tmpdir);
560    }
561    mr_free(command);
562
563    last = g_tapecatalog->entries - 1;
564    if (last <= 0) {
565        log_it("Too early to start deleting from collection.");
566        mr_free(tmpdir);
567        return (0);
568    }
569    final_alleged_writeK = g_tapecatalog->el[last].tape_posK;
570    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
571    for (curr = last; curr >= 0; curr--) {
572        cposK = g_tapecatalog->el[curr].tape_posK;
573        if (cposK < final_projected_certain_writeK) {
574            final_actually_certain_writeK = cposK;
575            break;
576        }
577    }
578    if (curr < 0) {
579        log_it("Not far enough into tape to start deleting old archives from collection.");
580        mr_free(tmpdir);
581        return (0);
582    }
583
584    for (i = curr - 1; i >= 0 && curr - i < 10; i--) {
585        mr_asprintf(&old_fname, "%s/%s", tmpdir, g_tapecatalog->el[i].fname);
586        unlink(old_fname);
587        mr_free(old_fname);
588    }
589    mr_free(tmpdir);
590    return (0);
591}
592
593
594
595
596/**
597 * Open the CD stream for input.
598 * @param bkpinfo The backup information structure. Passed to openin_tape().
599 * @return 0 for success, nonzero for failure.
600 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
601 */
602int openin_cdstream()
603{
604    return (openin_tape());
605}
606
607/**
608 * FIFO used to read/write to the tape device.
609 * @bug This seems obsolete now that we call an external @c buffer program. Please look onto this.
610 */
611char g_tape_fifo[MAX_STR_LEN];
612
613
614
615int set_tape_block_size_with_mt(long internal_tape_block_size)
616{
617    char *tmp = NULL;
618    int res;
619
620    if (strncmp(bkpinfo->media_device, "/dev/", 5)) {
621        log_msg(1,
622                "Not using 'mt setblk'. This isn't an actual /dev entry.");
623        return (0);
624    }
625    mr_asprintf(&tmp, "mt -f %s setblk %ld", bkpinfo->media_device, internal_tape_block_size);
626    res = run_program_and_log_output(tmp, 3);
627    mr_free(tmp);
628    return (res);
629}
630
631/**
632 * Return the non-rewinding device when passed the normal one
633 * @param tapedev The tape device to open for writing.
634 * @note the caller needs to free the string returned
635 */
636char *get_non_rewind_dev(char *tapedev)
637{
638
639    char *ntapedev = NULL;
640    char *p = NULL;
641    char *q = NULL;
642    char *r = NULL;
643
644    ntapedev = (char *)malloc(strlen(tapedev)+sizeof(char));
645    p = strrchr(tapedev,'/');
646    if (p == NULL) {
647        log_it("Didn't find a '/' in %s",tapedev);
648        return(NULL);
649    }
650
651    /* Copy tapedev content up to the last / */
652    q = tapedev;
653    r = ntapedev;
654    while (q != p) {
655        *r = *q;
656        r++;
657        q++;
658    }
659    /* Copy the '/' */
660    *r = *q;
661    r++;
662    q++;
663    /* Adds a 'n' - non-rewinding */
664    *r = 'n';
665    r++;
666    /* Copy the rest of tapedev */
667    while (*q != '\0') {
668        *r = *q;
669        r++;
670        q++;
671    }
672    *r = '\0';
673    if (mt_says_tape_exists(ntapedev)) {
674        log_it("Non-rewinding tape device is %s",ntapedev);
675    } else {
676        log_it("Unable to find non-rewinding tape device.");
677        ntapedev = NULL;
678    }
679    return(ntapedev);
680}
681
682
683
684/**
685 * Handle OBDR if we were asked to do so
686 * @param tapedev The tape device to open for reading.
687 */
688int skip_obdr(void)
689{
690    char *command = NULL;
691    int res = 0;
692
693    log_it("Skipping OBDR headers");
694    mr_asprintf(&command, "mt -f %s rewind",bkpinfo->media_device);
695    res = run_program_and_log_output(command, 1);
696    paranoid_free(command);
697
698    mr_asprintf(&command, "mt -f %s fsf 2",bkpinfo->media_device);
699    res = run_program_and_log_output(command, 1);
700    paranoid_free(command);
701
702    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
703    return(res);
704}
705
706/**
707 * Handle OBDR if we were asked to do so
708 * @param tapedev The tape device to open for writing.
709 * @return 0 for success, nonzero for failure.
710 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
711 * EXISTING DATA on the tape!
712 */
713int create_obdr(void)
714{
715
716    char *command = NULL;
717    int res = 0;
718
719    log_it("Creating OBDR headers");
720    /* OBDR: First block 10 kB of zero bs = 512 */
721    mr_asprintf(&command, "mt -f %s compression off",bkpinfo->media_device);
722    res = run_program_and_log_output(command, 1);
723    paranoid_free(command);
724
725    mr_asprintf(&command, "mt -f %s rewind",bkpinfo->media_device);
726    res += run_program_and_log_output(command, 1);
727    paranoid_free(command);
728
729    set_tape_block_size_with_mt(512);
730
731    mr_asprintf(&command, "dd if=/dev/zero of=%s bs=512 count=20",bkpinfo->media_device);
732    res += run_program_and_log_output(command, 1);
733    paranoid_free(command);
734
735    /* OBDR: then ISO boot image bs = 2048 */
736    set_tape_block_size_with_mt(2048);
737
738    mr_asprintf(&command, "dd if=%s of=%s bs=2048",MINDI_CACHE"/mondorescue.iso",bkpinfo->media_device);
739    res += run_program_and_log_output(command, 1);
740    paranoid_free(command);
741
742    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
743    return(res);
744}
745
746
747/**
748 * Open the tape device for input.
749 * @param bkpinfo The backup information structure. Fields used:
750 * - @c bkpinfo->media_device
751 * - @c bkpinfo->tmpdir
752 * @return 0 for success, nonzero for failure.
753 * @note This will also work with a cdstream for now, but don't count on this behavior.
754 */
755int openin_tape()
756{
757    /*@ buffer ***************************************************** */
758    char fname[MAX_STR_LEN];
759    char *datablock;
760    char *tmp = NULL;
761    char old_cwd[MAX_STR_LEN];
762    char *outfname = NULL;
763    /*@ int ******************************************************* */
764    int i;
765    int j;
766    int res = 0;
767    long length, templong;
768    size_t k;
769    int retval = 0;
770    int ctrl_chr;
771
772    /*@ long long ************************************************* */
773    long long size;
774
775    /*@ pointers ************************************************** */
776    FILE *fout;
777
778    /*@ end vars *************************************************** */
779
780    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
781    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
782        fatal_error("Cannot alloc mem for tape catalog");
783    }
784    g_tapecatalog->entries = 0;
785    g_tape_posK = 0;
786    if (g_tape_stream) {
787        log_it("FYI - I won't 'openin' the tape. It's already open.");
788        return (0);
789    }
790
791    // mondoarchive should have configured everything to give the right non-rew device
792    if ((bkpinfo->use_obdr) && (bkpinfo->media_device != NULL)) {
793        res = skip_obdr();
794        if (res != 0) {
795            log_it("Not able to skip OBDR - Restore will have to be done manually");
796        }
797    } else {
798        if (bkpinfo->media_device == NULL) {
799            log_it("Not able to skip OBDR - Restore will have to be done manually");
800        }
801        set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
802    }
803
804    insist_on_this_tape_number(1);
805    mr_asprintf(&outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
806    make_hole_for_file(outfname);
807
808//  start_buffer_process( bkpinfo->media_device, g_tape_fifo, FALSE);
809    log_it("Opening IN tape");
810    if (!
811        (g_tape_stream =
812         open_device_via_buffer(bkpinfo->media_device, 'r',
813                                bkpinfo->internal_tape_block_size))) {
814        log_OS_error(g_tape_fifo);
815        log_to_screen("Cannot openin stream device");
816        mr_free(outfname);
817        return (1);
818    }
819    log_to_screen("Reading stream");
820    log_it("stream device = '%s'", bkpinfo->media_device);
821/* skip data disks */
822    open_evalcall_form("Skipping data disks on stream");
823    log_to_screen("Skipping data disks on stream");
824    if (!(fout = fopen(outfname, "w"))) {
825        log_OS_error(outfname);
826        log_to_screen("Cannot openout datadisk all.tar.gz file");
827        mr_free(outfname);
828        return (-1);
829    }
830    if (!(datablock = (char *) malloc(256 * 1024))) {
831        log_to_screen("Unable to malloc 256*1024");
832        mr_free(outfname);
833        finish(1);
834    }
835    for (i = 0; i < 32; i++) {
836        for (j = 0; j < 4; j++) {
837            for (length = 0, k = 0; length < 256 * 1024; length += k) {
838                k = fread(datablock + length, 1, 256 * 1024 - length,
839                          g_tape_stream);
840            }
841            (void) fwrite(datablock, 1, (size_t) length, fout);
842            g_tape_posK += length / 1024;
843        }
844        if (i > 8)              // otherwise, 'buffer' distorts calculations
845        {
846            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
847            update_evalcall_form((int) (templong));
848        }
849    }
850    paranoid_fclose(fout);
851    paranoid_free(datablock);
852
853/* find initial blocks */
854    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
855    retval += res;
856    if (ctrl_chr != BLK_START_OF_TAPE) {
857        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
858    }
859    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
860    retval += res;
861    if (ctrl_chr != BLK_START_OF_BACKUP) {
862        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
863    }
864    close_evalcall_form();
865    log_it("Saved all.tar.gz to '%s'", outfname);
866    (void) getcwd(old_cwd, MAX_STR_LEN);
867    chdir(bkpinfo->tmpdir);
868    mr_asprintf(&tmp, "tar -zxf %s ./tmp/mondo-restore.cfg 2> /dev/null",
869            outfname);
870    paranoid_system(tmp);
871    mr_free(tmp);
872
873    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
874    chdir(old_cwd);
875    unlink(outfname);
876    mr_free(outfname);
877    return (retval);
878}
879
880
881/**
882 * Start writing to a CD stream.
883 * @param cddev The CD device to openout via cdrecord.
884 * @param speed The speed to write at.
885 * @return 0 for success, nonzero for failure.
886 * @note This should be called only from backup processes.
887 */
888int openout_cdstream(char *cddev, int speed)
889{
890    /*@ buffers ***************************************************** */
891    char *command = NULL;
892
893    /*@ end vars *************************************************** */
894
895    /*  add 'dummy' if testing */
896    mr_asprintf(&command, "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s", cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
897    /*  initialise the catalog */
898    g_current_media_number = 1;
899    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
900        fatal_error("Cannot alloc mem for tape catalog");
901    }
902    g_tapecatalog->entries = 0;
903    /* log stuff */
904    log_it("Opening OUT cdstream with the command");
905    log_it(command);
906    /*  log_it("Let's see what happens, shall we?"); */
907    g_tape_stream = popen(command, "w");
908    mr_free(command);
909
910    if (g_tape_stream) {
911        return (0);
912    } else {
913        log_to_screen("Failed to openout to cdstream (fifo)");
914        return (1);
915    }
916}
917
918
919/**
920 * Start writing to a tape device for the backup.
921 * Handle OBDR if we were asked to do so
922 * @param tapedev The tape device to open for writing.
923 * @return 0 for success, nonzero for failure.
924 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
925 * EXISTING DATA on the tape!
926 */
927int openout_tape() {
928
929g_current_media_number = 1;
930if (g_tape_stream) {
931    log_it("FYI - I won't 'openout' the tape. It's already open.");
932    return (0);
933}
934if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
935    fatal_error("Cannot alloc mem for tape catalog");
936}
937g_tapecatalog->entries = 0;
938g_tape_posK = 0;
939
940if (bkpinfo->use_obdr) {
941    create_obdr();
942} else {
943    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
944}
945log_it("Opening OUT tape");
946if (!
947    (g_tape_stream =
948     open_device_via_buffer(bkpinfo->media_device, 'w', bkpinfo->internal_tape_block_size))) {
949    log_OS_error(g_tape_fifo);
950    log_to_screen("Cannot openin stream device");
951    return (1);
952}
953return (0);
954}
955
956
957
958
959/**
960 * Copy a file from the opened stream (CD or tape) to @p outfile.
961 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
962 * @param outfile The file to write to.
963 * @param size The size of the file in the input stream.
964 * @return 0 for success, nonzero for failure.
965 */
966int
967read_file_from_stream_to_file(char *outfile, long long size)
968{
969
970    /*@ int ******************************************************** */
971    int res;
972
973    /*@ end vars *************************************************** */
974
975    res = read_file_from_stream_FULL(outfile, NULL, size);
976
977    return (res);
978}
979
980
981
982/**
983 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
984 * by @p fout.
985 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
986 * @param fout The stream to write the file to.
987 * @param size The size of the file in bytes.
988 * @return 0 for success, nonzero for failure.
989 */
990int
991read_file_from_stream_to_stream(FILE * fout, long long size)
992{
993
994    /*@ int ******************************************************** */
995    int res;
996
997    /*@ end vars *************************************************** */
998
999    res = read_file_from_stream_FULL(NULL, fout, size);
1000/*  fflush(g_tape_stream);
1001  fflush(fout);*/
1002    return (res);
1003}
1004
1005
1006
1007/**
1008 * Copy a file from the currently opened stream (CD or tape) to either a
1009 * @c FILE pointer indicating a currently-opened file, or a filename indicating
1010 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
1011 * and read_file_from_stream_to_stream() are wrappers for.
1012 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1013 * @param outfname If non-NULL, write to this file.
1014 * @param foutstream If non-NULL, write to this stream.
1015 * @param orig_size The original length of the file in bytes.
1016 * @return 0 for success, nonzero for failure.
1017 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
1018 */
1019int
1020read_file_from_stream_FULL(char *outfname, FILE * foutstream, long long orig_size)
1021{
1022    /*@ buffers ***************************************************** */
1023    char *tmp = NULL;
1024    char *datablock;
1025    char *temp_fname;
1026    char *temp_cksum;
1027    char *actual_cksum = NULL;
1028//  char *pA, *pB;
1029
1030    /*@ int ********************************************************* */
1031    int retval = 0;
1032#ifdef EXTRA_TAPE_CHECKSUMS
1033    int i, ch;
1034#endif
1035    int noof_blocks;
1036    int ctrl_chr;
1037    int res;
1038    /*@ pointers **************************************************** */
1039    FILE *fout;
1040
1041    /*@ long    ***************************************************** */
1042    long bytes_to_write = 0L /*,i */ ;
1043//  long bytes_successfully_read_in_this_time = 0;
1044
1045    /*@ long long *************************************************** */
1046    long long temp_size, size;
1047    long bytes_read, bytes_to_read;
1048    long long total_read_from_tape_for_this_file = 0;
1049    long long where_I_was_before_tape_change = 0;
1050    /*@ unsigned int ************************************************ */
1051    /*  unsigned int ch; */
1052    unsigned int crc16;
1053    unsigned int crctt;
1054
1055    bool had_to_resync = FALSE;
1056
1057    /*@ init  ******************************************************* */
1058    malloc_string(temp_fname);
1059    malloc_string(temp_cksum);
1060    datablock = malloc(TAPE_BLOCK_SIZE);
1061    crc16 = 0;
1062    crctt = 0;
1063    size = orig_size;
1064
1065    /*@ end vars *************************************************** */
1066
1067    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1068    if (orig_size != temp_size && orig_size != -1) {
1069        mr_asprintf(&tmp, "output file's size should be %ld K but is apparently %ld K", (long) size >> 10, (long) temp_size >> 10);
1070        log_to_screen(tmp);
1071        mr_free(tmp);
1072    }
1073    if (ctrl_chr != BLK_START_FILE) {
1074        wrong_marker(BLK_START_FILE, ctrl_chr);
1075        return (1);
1076    }
1077
1078    if (foutstream) {
1079        fout = foutstream;
1080    } else {
1081        fout = fopen(outfname, "w");
1082    }
1083    if (!fout) {
1084        log_OS_error(outfname);
1085        log_to_screen("Cannot openout file");
1086        return (1);
1087    }
1088    total_read_from_tape_for_this_file = 0;
1089    for (noof_blocks = 0; size > 0;
1090         noof_blocks++, size -=
1091         bytes_to_write, total_read_from_tape_for_this_file +=
1092         bytes_read) {
1093        bytes_to_write =
1094            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1095        bytes_to_read = TAPE_BLOCK_SIZE;
1096        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1097        while (bytes_read < bytes_to_read) {    // next tape!
1098//    crctt=crc16=0;
1099            where_I_was_before_tape_change = size;
1100            log_msg(4, "where_I_was_... = %lld",
1101                    where_I_was_before_tape_change);
1102            start_to_read_from_next_tape();
1103            log_msg(4, "Started reading from next tape.");
1104            skip_incoming_files_until_we_find_this_one(temp_fname);
1105            log_msg(4, "Skipped irrelevant files OK.");
1106            for (size = orig_size; size > where_I_was_before_tape_change;
1107                 size -= bytes_to_write) {
1108                bytes_read =
1109                    fread(datablock, 1, bytes_to_read, g_tape_stream);
1110            }
1111            log_msg(4, "'size' is now %lld (should be %lld)", size,
1112                    where_I_was_before_tape_change);
1113            log_to_screen("Successfully re-sync'd tape");
1114            had_to_resync = TRUE;
1115            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1116        }
1117
1118        (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
1119
1120#ifdef EXTRA_TAPE_CHECKSUMS
1121        for (i = 0; i < (int) bytes_to_write; i++) {
1122            ch = datablock[i];
1123            crc16 = updcrcr(crc16, (unsigned) ch);
1124            crctt = updcrc(crctt, (unsigned) ch);
1125        }
1126#endif
1127    }
1128    log_msg(6, "Total read from tape for this file = %lld",
1129            total_read_from_tape_for_this_file);
1130    log_msg(6, ".......................... Should be %lld", orig_size);
1131    g_tape_posK += total_read_from_tape_for_this_file / 1024;
1132    mr_asprintf(&actual_cksum, "%04x%04x", crc16, crctt);
1133    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
1134    } else {
1135        paranoid_fclose(fout);
1136    }
1137    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
1138    if (ctrl_chr != BLK_STOP_FILE) {
1139        wrong_marker(BLK_STOP_FILE, ctrl_chr);
1140    }
1141    if (strcmp(temp_cksum, actual_cksum)) {
1142        mr_asprintf(&tmp, "actual cksum=%s; recorded cksum=%s", actual_cksum,
1143                temp_cksum);
1144        log_to_screen(tmp);
1145        mr_free(tmp);
1146
1147        mr_asprintf(&tmp, "%s (%ld K) is corrupt on tape", temp_fname,
1148                (long) orig_size >> 10);
1149        log_to_screen(tmp);
1150        mr_free(tmp);
1151
1152        retval++;
1153    }
1154    mr_free(actual_cksum);
1155
1156    paranoid_free(datablock);
1157    paranoid_free(temp_fname);
1158    paranoid_free(temp_cksum);
1159    return (retval);
1160}
1161
1162
1163
1164/**
1165 * Read a header block from the currently opened stream (CD or tape).
1166 * This block indicates the length of the following file (if it's file-related)
1167 * the filename (if it's file-related), and the block type.
1168 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
1169 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
1170 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
1171 * @return 0 for success, nonzero for failure.
1172 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
1173 */
1174int
1175read_header_block_from_stream(long long *plen, char *filename,
1176                              int *pcontrol_char)
1177{
1178
1179    /*@ buffers ***************************************************** */
1180    char *tempblock;
1181
1182    /*@ int ********************************************************* */
1183    int i, retval;
1184
1185    /*@ end vars *************************************************** */
1186
1187    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
1188
1189    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1190        tempblock[i] = 0;
1191    }
1192    while (!(*pcontrol_char = tempblock[7000])) {
1193        g_tape_posK +=
1194            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1195                  g_tape_stream) / 1024;
1196    }
1197/*  memcpy((char*)plength_of_incoming_file,(char*)tempblock+7001,sizeof(long long)); */
1198/*  for(*plen=0,i=7;i>=0;i--) {*plen<<=8; *plen |= tempblock[7001+i];} */
1199    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1200    if (strcmp(tempblock + 6000 + *pcontrol_char, STR_HEADER)) {
1201        log_it("Bad header block at %ld K", (long) g_tape_posK);
1202    }
1203    strcpy(filename, tempblock + 1000);
1204/*  strcpy(cksum,tempblock+5555);*/
1205/*  log_it( "%s  (reading) fname=%s, filesize=%ld K",
1206       marker_to_string (*pcontrol_char), filename,
1207       (long) ((*plen) >> 10));
1208*/
1209    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1210        log_to_screen("I can't verify an aborted backup.");
1211        retval = 1;
1212    } else {
1213        retval = 0;
1214    }
1215    for (i = 1000; i < 1020; i++) {
1216        if (tempblock[i] < 32 || tempblock[i] > 126) {
1217            tempblock[i] = ' ';
1218        }
1219    }
1220    tempblock[i] = '\0';
1221    log_msg(6, "%s (fname=%s, size=%ld K)",
1222            marker_to_string(*pcontrol_char), tempblock + 1000,
1223            (long) (*plen) >> 10);
1224    paranoid_free(tempblock);
1225    return (retval);
1226}
1227
1228
1229
1230/**
1231 * Add specified file/slice to the internal catalog of all archives written.
1232 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1233 * write the last [buffer size] MB from the catalog to the new tape, so we know
1234 * we have @e all archives on some CD/tape/whatever.
1235 * @param type The type of file we're cataloging (afioball, slice, something else)
1236 * @param number The fileset number or biggiefile number.
1237 * @param aux The slice number if it's a biggiefile, or any other additional info.
1238 * @param fn The original full pathname of the file we're recording.
1239 * @return The index of the record we just added.
1240 */
1241int register_in_tape_catalog(t_archtype type, int number, long aux,
1242                             char *fn)
1243{
1244    int last;
1245    char fname[MAX_TAPECAT_FNAME_LEN+1];
1246    char *p;
1247
1248    p = strrchr(fn, '/');
1249    if (p) {
1250        p++;
1251    } else {
1252        p = fn;
1253    }
1254    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1255    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1256    last = g_tapecatalog->entries;
1257    if (last >= MAX_TAPECATALOG_ENTRIES) {
1258        log_it
1259            ("Warning - can't log #%d in tape catalog - too many entries already",
1260             number);
1261        return (-1);
1262    }
1263    g_tapecatalog->el[last].type = type;
1264    g_tapecatalog->el[last].number = number;
1265    g_tapecatalog->el[last].aux = aux;
1266    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1267    strcpy(g_tapecatalog->el[last].fname, fname);
1268    g_tapecatalog->entries++;
1269    return (last);              // returns the index of the record we've jsut added
1270}
1271
1272
1273
1274
1275/**
1276 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1277 * (got SIGPIPE) or look like we will.
1278 * @param mediasize The size of the tape in megabytes.
1279 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1280 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1281 * autodetecting the size. Huh?
1282 */
1283
1284/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1285bool
1286should_we_write_to_next_tape(long mediasize,
1287                             off_t length_of_incoming_file)
1288{
1289    /*@ bool's ***************************************************** */
1290    bool we_need_a_new_tape = FALSE;
1291
1292    /*@ end vars *************************************************** */
1293
1294    if (mediasize == 0) {
1295        return (FALSE);
1296    }
1297    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1298        log_it("mediasize = %ld", mediasize);
1299        we_need_a_new_tape = TRUE;
1300        log_to_screen("Should have started a new tape/CD already");
1301    }
1302    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1303        mediasize - (SLICE_SIZE * 4 / 1024)) {
1304        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1305               mediasize);
1306        we_need_a_new_tape = TRUE;
1307    }
1308    return (we_need_a_new_tape);
1309}
1310
1311
1312/**
1313 * Seek through the stream until we find a header block where the NAME field matches
1314 * @p the_file_I_was_reading. This is useful if you've just started reading from
1315 * a new tape and want to find the file you were reading when the tape ended.
1316 * @param the_file_I_was_reading File name to look for.
1317 * @return 0 for success, nonzero for failure.
1318 */
1319int skip_incoming_files_until_we_find_this_one(char
1320                                               *the_file_I_was_reading)
1321{
1322    char *pA;
1323    char *pB;
1324    int res;
1325    int ctrl_chr;
1326    char *temp_fname;
1327    char *datablock;
1328    long long temp_size, size;
1329    long bytes_to_write;
1330
1331    datablock = malloc(TAPE_BLOCK_SIZE);
1332    malloc_string(temp_fname);
1333    pB = strrchr(the_file_I_was_reading, '/');
1334    if (pB) {
1335        pB++;
1336    } else {
1337        pB = the_file_I_was_reading;
1338    }
1339    log_msg(1, "skip_incoming_..(%s)", pB);
1340    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1341    ctrl_chr = -1;
1342    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1343        res =
1344            read_header_block_from_stream(&temp_size, temp_fname,
1345                                          &ctrl_chr);
1346        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1347            break;
1348        }
1349        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1350        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1351        log_msg(3, "Still trying to re-sync w/ tape");
1352    }
1353    while (ctrl_chr != BLK_START_FILE) {
1354        res =
1355            read_header_block_from_stream(&temp_size, temp_fname,
1356                                          &ctrl_chr);
1357        if (ctrl_chr == BLK_START_FILE) {
1358            break;
1359        }
1360        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1361        wrong_marker(BLK_START_FILE, ctrl_chr);
1362        log_msg(3, "Still trying to re-sync w/ tape");
1363    }
1364    pA = strrchr(temp_fname, '/');
1365    if (pA) {
1366        pA++;
1367    } else {
1368        pA = temp_fname;
1369    }
1370    pB = strrchr(the_file_I_was_reading, '/');
1371    if (pB) {
1372        pB++;
1373    } else {
1374        pB = the_file_I_was_reading;
1375    }
1376    while (strcmp(pA, pB)) {
1377        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1378                the_file_I_was_reading);
1379        for (size = temp_size; size > 0; size -= bytes_to_write) {
1380            bytes_to_write =
1381                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1382            // FIXME - needs error-checking and -catching
1383            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1384        }
1385        res =
1386            read_header_block_from_stream(&temp_size, temp_fname,
1387                                          &ctrl_chr);
1388        if (ctrl_chr != BLK_STOP_FILE) {
1389            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1390        }
1391        res =
1392            read_header_block_from_stream(&temp_size, temp_fname,
1393                                          &ctrl_chr);
1394        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1395            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1396        }
1397        res =
1398            read_header_block_from_stream(&temp_size, temp_fname,
1399                                          &ctrl_chr);
1400        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1401            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1402        }
1403        res =
1404            read_header_block_from_stream(&temp_size, temp_fname,
1405                                          &ctrl_chr);
1406        if (ctrl_chr != BLK_START_FILE) {
1407            wrong_marker(BLK_START_FILE, ctrl_chr);
1408        }
1409        pA = strrchr(temp_fname, '/');
1410        if (pA) {
1411            pA++;
1412        } else {
1413            pA = temp_fname;
1414        }
1415        pB = strrchr(the_file_I_was_reading, '/');
1416        if (pB) {
1417            pB++;
1418        } else {
1419            pB = the_file_I_was_reading;
1420        }
1421    }
1422    log_msg(2, "Reading %s (it matches %s)", temp_fname,
1423            the_file_I_was_reading);
1424    paranoid_free(temp_fname);
1425    paranoid_free(datablock);
1426    return (0);
1427}
1428
1429
1430/**
1431 * Start to read from the next tape. Assumes the user has already inserted it.
1432 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1433 * @return 0 for success, nonzero for failure.
1434 */
1435int start_to_read_from_next_tape()
1436{
1437    /*@ int ********************************************************* */
1438    int res = 0;
1439    char *sz_msg;
1440    int ctrlchr;
1441    long long temp_size;
1442    malloc_string(sz_msg);
1443    /*@ end vars *************************************************** */
1444
1445    paranoid_pclose(g_tape_stream);
1446    sync();
1447    sync();
1448    sync();
1449    log_it("Next tape requested.");
1450    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1451    log_it("Opening IN the next tape");
1452    if (!
1453        (g_tape_stream =
1454         open_device_via_buffer(bkpinfo->media_device, 'r',
1455                                bkpinfo->internal_tape_block_size))) {
1456        log_OS_error(g_tape_fifo);
1457        log_to_screen("Cannot openin stream device");
1458        return (1);
1459    }
1460    g_tape_posK = 0;
1461    g_sigpipe = FALSE;
1462    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1463    if (ctrlchr != BLK_START_OF_TAPE) {
1464        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1465    }
1466    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1467    if (ctrlchr != BLK_START_OF_BACKUP) {
1468        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1469    } else {
1470        log_msg(3, "Next tape opened OK. Whoopee!");
1471    }
1472    paranoid_free(sz_msg);
1473    return (res);
1474}
1475
1476
1477
1478/**
1479 * Start to write to the next tape. Assume the user has already inserted it.
1480 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1481 * @return 0 for success, nonzero for failure.
1482 */
1483int start_to_write_to_next_tape()
1484{
1485    int res = 0;
1486    char *command = NULL;
1487
1488    paranoid_pclose(g_tape_stream);
1489    system("sync");
1490    system("sync");
1491    system("sync");
1492    log_it("New tape requested.");
1493    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1494    if (g_current_media_number > MAX_NOOF_MEDIA) {
1495        res++;
1496        log_to_screen("Too many tapes. Man, you need to use nfs!");
1497    }
1498    if (bkpinfo->backup_media_type == cdstream) {
1499        mr_asprintf(&command,
1500                "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1501                bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE,
1502                MONDO_LOGFILE);
1503        log_it("Opening OUT to next CD with the command");
1504        log_it(command);
1505        log_it("Let's see what happens, shall we?");
1506        g_tape_stream = popen(command, "w");
1507        mr_free(command);
1508
1509        if (!g_tape_stream) {
1510            log_to_screen("Failed to openout to cdstream (fifo)");
1511            return (1);
1512        }
1513    } else {
1514        log_it("Opening OUT to next tape");
1515        if (!
1516            (g_tape_stream =
1517             open_device_via_buffer(bkpinfo->media_device, 'w',
1518                                    bkpinfo->internal_tape_block_size))) {
1519            log_OS_error(g_tape_fifo);
1520            log_to_screen("Cannot openin stream device");
1521            return (1);
1522        }
1523    }
1524    g_tape_posK = 0;
1525    g_sigpipe = FALSE;
1526    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1527    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1528    return (res);
1529}
1530
1531
1532
1533
1534/**
1535 * Write a bufferfull of the most recent archives to the tape. The
1536 * rationale behind this is a bit complex. If the previous tape ended
1537 * suddenly (EOF or otherwise) some archives were probably left in the
1538 * buffer. That means that Mondo thinks they have been written, but
1539 * the external binary @c buffer has not actually written them. So to
1540 * be safe, we start the new tape by writing the last bufferfull from
1541 * the old one. This insures that all archives will be on at least
1542 * one tape. Sounds inelegant, but it works.
1543 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1544 * @return 0 for success, nonzero for failure.
1545 */
1546int write_backcatalog_to_tape()
1547{
1548    int i, last, res = 0;
1549    char *fname = NULL;
1550
1551    log_msg(2, "I am now writing back catalog to tape");
1552    last = g_tapecatalog->entries - 1;
1553    for (i = 0; i <= last; i++) {
1554        mr_asprintf(&fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir, g_tapecatalog->el[i].fname);
1555        if (!does_file_exist(fname)) {
1556            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1557        } else {
1558            write_header_block_to_stream(length_of_file(fname),
1559                                         "start-backcatalog-afio-or-slice",
1560                                         BLK_START_AN_AFIO_OR_SLICE);
1561            log_msg(2, "Writing %s", fname);
1562            if (write_file_to_stream_from_file(fname)) {
1563                res++;
1564                log_msg(2, "%s failed", fname);
1565            }
1566            if (i != last) {
1567                write_header_block_to_stream((off_t)0,
1568                                             "stop-backcatalog-afio-or-slice",
1569                                             BLK_STOP_AN_AFIO_OR_SLICE);
1570            }
1571        }
1572        mr_free(fname);
1573    }
1574    log_msg(2, "Finished writing back catalog to tape");
1575    return (res);
1576}
1577
1578
1579
1580/**
1581 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1582 * @param fname The path to all.tar.gz.
1583 * @return 0 for success, nonzero for failure.
1584 */
1585int write_data_disks_to_stream(char *fname)
1586{
1587    /*@ pointers *************************************************** */
1588    FILE *fin;
1589    char *tmp = NULL;
1590
1591    /*@ long ******************************************************* */
1592    long m = -1;
1593    long templong;
1594
1595    /*@ int ******************************************************** */
1596    int i, j;
1597
1598    /*@ buffers **************************************************** */
1599    char tempblock[256 * 1024];
1600
1601    /*@ end vars *************************************************** */
1602
1603    open_evalcall_form("Writing data disks to tape");
1604    log_to_screen("Writing data disks to tape");
1605    log_it("Data disks = %s", fname);
1606    if (!does_file_exist(fname)) {
1607        mr_asprintf(&tmp, "Cannot find %s", fname);
1608        log_to_screen(tmp);
1609        mr_free(tmp);
1610        return (1);
1611    }
1612    if (!(fin = fopen(fname, "r"))) {
1613        log_OS_error(fname);
1614        fatal_error("Cannot openin the data disk");
1615    }
1616    for (i = 0; i < 32; i++) {  /* 32MB */
1617        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1618            if (!feof(fin)) {
1619                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1620            } else {
1621                m = 0;
1622            }
1623            for (; m < 256 * 1024; m++) {
1624                tempblock[m] = '\0';
1625            }
1626            g_tape_posK +=
1627                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1628        }
1629        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1630        {
1631            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1632            update_evalcall_form((int) (templong));
1633        }
1634    }
1635    paranoid_fclose(fin);
1636    close_evalcall_form();
1637    return (0);
1638}
1639
1640
1641
1642
1643/**
1644 * Copy @p infile to the opened stream (CD or tape).
1645 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1646 * @param infile The file to write to the stream.
1647 * @return 0 for success, nonzero for failure.
1648 */
1649int write_file_to_stream_from_file(char *infile)
1650{
1651    /*@ buffers **************************************************** */
1652    char *tmp = NULL;
1653    char datablock[TAPE_BLOCK_SIZE];
1654    char *checksum = NULL;
1655    char *infile_basename;
1656
1657    /*@ int ******************************************************** */
1658    int retval = 0;
1659    int noof_blocks;
1660
1661    /*  unsigned int ch; */
1662    unsigned int crc16;
1663    unsigned int crctt;
1664
1665    /*@ pointers *************************************************** */
1666    FILE *fin;
1667    char *p;
1668
1669    /*@ long ******************************************************* */
1670    long bytes_to_read = 0;
1671    long i;
1672
1673    off_t filesize;
1674
1675#ifdef EXTRA_TAPE_CHECKSUMS
1676    int ch;
1677#endif
1678
1679    /*@ initialize ************************************************ */
1680    crc16 = 0;
1681    crctt = 0;
1682
1683
1684
1685    /*@ end vars *************************************************** */
1686
1687    infile_basename = strrchr(infile, '/');
1688    if (infile_basename) {
1689        infile_basename++;
1690    } else {
1691        infile_basename = infile;
1692    }
1693    filesize = length_of_file(infile);
1694    if (should_we_write_to_next_tape
1695        (bkpinfo->media_size[g_current_media_number], filesize)) {
1696        start_to_write_to_next_tape();
1697        write_backcatalog_to_tape();
1698    }
1699    p = strrchr(infile, '/');
1700    if (!p) {
1701        p = infile;
1702    } else {
1703        p++;
1704    }
1705    mr_asprintf(&tmp, "Writing file '%s' to tape (%ld KB)", p,
1706            (long) filesize >> 10);
1707    log_it(tmp);
1708    mr_free(tmp);
1709    write_header_block_to_stream(filesize, infile_basename,
1710                                 BLK_START_FILE);
1711//go_here_to_restart_saving_of_file:
1712    if (!(fin = fopen(infile, "r"))) {
1713        log_OS_error(infile);
1714        return (1);
1715    }
1716    for (noof_blocks = 0; filesize > 0;
1717         noof_blocks++, filesize -= bytes_to_read) {
1718        if (filesize < TAPE_BLOCK_SIZE) {
1719            bytes_to_read = (long) filesize;
1720            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1721                datablock[i] = '\0';
1722            }
1723        } else {
1724            bytes_to_read = TAPE_BLOCK_SIZE;
1725        }
1726        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1727        g_tape_posK +=
1728            fwrite(datablock, 1, /*bytes_to_read */ 
1729                   (size_t) TAPE_BLOCK_SIZE,
1730                   g_tape_stream) / 1024;
1731        if (g_sigpipe) {
1732            log_it("Sigpipe occurred recently. I'll start a new tape.");
1733            fclose(fin);
1734            g_sigpipe = FALSE;
1735            start_to_write_to_next_tape();
1736            write_backcatalog_to_tape();    // kinda-sorta recursive :)
1737            return (0);
1738        }
1739#ifdef EXTRA_TAPE_CHECKSUMS
1740        for (i = 0; i < bytes_to_read; i++) {
1741            ch = datablock[i];
1742            crc16 = updcrcr(crc16, (unsigned) ch);
1743            crctt = updcrc(crctt, (unsigned) ch);
1744        }
1745#endif
1746    }
1747    paranoid_fclose(fin);
1748    mr_asprintf(&checksum, "%04x%04x", crc16, crctt);
1749    /* BERLIOS: what does it do ??? */
1750    write_header_block_to_stream((off_t)g_current_media_number, checksum, BLK_STOP_FILE);
1751    mr_free(checksum);
1752
1753//  log_it("File '%s' written to tape.", infile);
1754    return (retval);
1755}
1756
1757
1758
1759
1760
1761/**
1762 * Write a header block to the opened stream (CD or tape).
1763 * @param length_of_incoming_file The length to store in the header block.
1764 * Usually matters only if this is a file-related header, in which case it should
1765 * be the length of the file that will follow.
1766 * @param filename The filename to store in the header block. Usually matters
1767 * only if this is a file-related header, in which case this should be the name
1768 * if the file that will follow.
1769 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1770 * @return 0 for success, nonzero for failure.
1771 */
1772int
1773write_header_block_to_stream(off_t length_of_incoming_file,
1774                             char *filename, int control_char)
1775{
1776    /*@ buffers **************************************************** */
1777    char tempblock[TAPE_BLOCK_SIZE];
1778    char *tmp = NULL;
1779    char *p;
1780
1781    /*@ int ******************************************************** */
1782    int i;
1783
1784    off_t olen;
1785
1786    /*@ end vars *************************************************** */
1787
1788
1789    olen = length_of_incoming_file;
1790    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1791    if (!p) {
1792        p = filename;
1793    } else {
1794        p++;
1795    }
1796    if (!g_tape_stream) {
1797        log_to_screen
1798            ("You're not backing up to tape. Why write a tape header?");
1799        return (1);
1800    }
1801    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1802        tempblock[i] = 0;
1803    }
1804    sprintf(tempblock + 6000 + control_char, STR_HEADER);
1805    tempblock[7000] = control_char;
1806    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1807    strcpy(tempblock + 1000, filename);
1808    g_tape_posK +=
1809        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1810               g_tape_stream) / 1024;
1811    mr_asprintf(&tmp, "%s (fname=%s, size=%ld K)",
1812            marker_to_string(control_char), p,
1813            (long) length_of_incoming_file >> 10);
1814    log_msg(6, tmp);
1815    mr_free(tmp);
1816    return (0);
1817}
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828/**
1829 * Log (to screen) an erroneous marker, along with what it should have been.
1830 * @param should_be What we were expecting.
1831 * @param it_is What we got.
1832 */
1833void wrong_marker(int should_be, int it_is)
1834{
1835    /*@ buffer ***************************************************** */
1836    char *tmp = NULL;
1837
1838
1839    /*@ end vars *************************************************** */
1840    mr_asprintf(&tmp, "Wrong marker! (Should be %s, is actually %s)", marker_to_string(should_be), marker_to_string(it_is));
1841    log_to_screen(tmp);
1842    mr_free(tmp);
1843}
1844
1845/* @} - end of streamGroup */
Note: See TracBrowser for help on using the repository browser.