source: branches/2.2.6/mondo/src/common/libmondo-stream.c @ 1956

Last change on this file since 1956 was 1956, checked in by bruno, 11 years ago

Use non-rewinding tape name earlier to pass it to mindi so that at restore time we have the right device name for OBDR

  • Property svn:keywords set to Id
File size: 51.6 KB
Line 
1/* libmondo-stream.c
2   $Id: libmondo-stream.c 1956 2008-05-27 16:23:02Z 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 "mondostructures.h"
16#include "libmondo-devices.h"
17#include "lib-common-externs.h"
18#include "libmondo-stream.h"
19#include "libmondo-string-EXT.h"
20#include "libmondo-files-EXT.h"
21#include "libmondo-gui-EXT.h"
22#include "libmondo-fork-EXT.h"
23#include "libmondo-tools-EXT.h"
24#include "libmondo-fifo-EXT.h"
25
26#define EXTRA_TAPE_CHECKSUMS
27#define STR_HEADER  "Mondolicious, baby"
28
29/*@unused@*/
30//static char cvsid[] = "$Id: libmondo-stream.c 1956 2008-05-27 16:23:02Z bruno $";
31extern bool g_sigpipe;
32extern int g_tape_buffer_size_MB;
33
34extern char *g_getfacl;
35extern char *g_getfattr;
36extern char *MONDO_LOGFILE;
37
38/* Reference to global bkpinfo */
39extern struct s_bkpinfo *bkpinfo;
40
41/**
42 * @addtogroup globalGroup
43 * @{
44 */
45/**
46 * The file pointer for the opened tape/CD stream.
47 * Opened and closed by openin_tape(), openin_cdstream(),
48 * openout_tape(), openout_cdstream(), closein_tape(), closein_cdstream(),
49 * closeout_tape(), and closeout_cdstream().
50 */
51FILE *g_tape_stream = NULL;
52
53
54/**
55 * The position (in kilobytes) where we are on the tape.
56 */
57long long g_tape_posK = 0;
58
59/**
60 * The current media number we're using. This value is 1-based.
61 */
62int g_current_media_number = -1;
63
64/**
65 * The tape catalog that keeps track of files written to tape.
66 */
67struct s_tapecatalog *g_tapecatalog;
68
69/* @} - end of globalGroup */
70
71int write_backcatalog_to_tape();
72
73
74
75
76
77/**
78 * @addtogroup streamGroup
79 * @{
80 */
81/**
82 * Close the global output file descriptor which Mondo has used to read
83 * from the CD stream.
84 * @param bkpinfo The backup information structure. Passed directly to closein_tape().
85 * @return 0 for success, nonzero for failure.
86 * @note This should be called by restore processes only.
87 */
88int closein_cdstream()
89{
90    return (closein_tape());
91}
92
93
94/**
95 * Close the global output file descriptor which Mondo has used to read
96 * from buffer or dd, which read from the tape.
97 * @param bkpinfo The backup information structure. Unused.
98 * @return 0 for success, nonzero for failure.
99 * @note This should be called by restore processes only.
100 * @note This function also works for cdstreams for now, but don't count on this behavior.
101 * @bug @p bkpinfo parameter is unused.
102 */
103int closein_tape()
104{
105    /*@ int's ******************************************************* */
106    int retval = 0;
107    int res = 0;
108    int ctrl_chr = '\0';
109
110    /*@ buffers ***************************************************** */
111    char fname[MAX_STR_LEN];
112
113    /*@ long long's ************************************************* */
114    long long size;
115    char *blk;
116    int i;
117
118    blk = (char *) malloc(256 * 1024);
119
120    log_it("closein_tape() -- entering");
121    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
122    retval += res;
123    if (ctrl_chr != BLK_END_OF_BACKUP) {
124        wrong_marker(BLK_END_OF_BACKUP, ctrl_chr);
125    }
126    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
127    retval += res;
128    if (ctrl_chr != BLK_END_OF_TAPE) {
129        wrong_marker(BLK_END_OF_TAPE, ctrl_chr);
130    }
131    for (i = 0; i < 8 && !feof(g_tape_stream); i++) {
132        (void) fread(blk, 1, 256 * 1024, g_tape_stream);
133    }
134    sleep(1);
135    paranoid_system("sync");
136    sleep(1);
137    paranoid_pclose(g_tape_stream);
138    log_it("closein_tape() -- leaving");
139/*
140  for(i=0; i < g_tapecatalog->entries; i++)
141    {
142      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);
143    }
144*/
145    if (!bkpinfo->please_dont_eject) {
146        eject_device(bkpinfo->media_device);
147    }
148    paranoid_free(blk);
149    paranoid_free(g_tapecatalog);
150    return (retval);
151}
152
153
154
155/**
156 * Close the global output file descriptor which Mondo has been using to write
157 * to the tape device (via buffer or dd).
158 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
159 * @return 0 for success, nonzero for failure.
160 * @note This should be called by backup processes only.
161 */
162int closeout_tape()
163{
164    /*@ int's ******************************************************* */
165    int retval = 0;
166//  int res = 0;
167//  int ctrl_chr = '\0';
168
169    /*@ buffers ***************************************************** */
170//  char fname[MAX_STR_LEN];
171
172    /*@ long long's ************************************************* */
173//  long long size;
174    int i;
175    char *blk;
176
177    blk = (char *) malloc(256 * 1024);
178
179    sleep(1);
180    paranoid_system("sync");
181    sleep(1);
182    log_it("closeout_tape() -- entering");
183    retval +=
184        write_header_block_to_stream((off_t)0, "end-of-backup",
185                                     BLK_END_OF_BACKUP);
186    retval += write_header_block_to_stream((off_t)0, "end-of-tape", BLK_END_OF_TAPE);   /* just in case */
187/* write 1MB of crap */
188    for (i = 0; i < 256 * 1024; i++) {
189        blk[i] = (int) (random() & 0xFF);
190    }
191    for (i = 0; i < 4 * 8; i++) {
192        (void) fwrite(blk, 1, 256 * 1024, g_tape_stream);
193        if (should_we_write_to_next_tape
194            (bkpinfo->media_size[g_current_media_number], (off_t)256 * 1024)) {
195            start_to_write_to_next_tape();
196        }
197    }
198/* write 1MB of zeroes */
199/*
200    for (i = 0; i < 256*1024; i++)
201      {
202        blk[i] = 0;
203      }
204    for (i = 0; i < 4; i++)
205      {
206        fwrite (blk, 1, 256*1024, g_tape_stream);
207        if (should_we_write_to_next_tape (bkpinfo->media_size[g_current_media_number], 256*1024))
208          {
209            start_to_write_to_next_tape ();
210          }
211      }
212*/
213    sleep(2);
214    paranoid_pclose(g_tape_stream);
215    log_it("closeout_tape() -- leaving");
216    for (i = 0; i < g_tapecatalog->entries; i++) {
217        log_it("i=%d type=%s num=%d aux=%ld posK=%lld", i,
218               (g_tapecatalog->el[i].type ==
219                fileset) ? "fileset" : "bigslice",
220               g_tapecatalog->el[i].number, g_tapecatalog->el[i].aux,
221               g_tapecatalog->el[i].tape_posK);
222    }
223    //  if (!bkpinfo->please_dont_eject)
224    //    { eject_device(bkpinfo->media_device); }
225    paranoid_free(blk);
226    paranoid_free(g_tapecatalog);
227    return (retval);
228}
229
230
231
232bool mt_says_tape_exists(char *dev)
233{
234    char *command;
235    int res;
236
237    malloc_string(command);
238    sprintf(command, "mt -f %s status", dev);
239    res = run_program_and_log_output(command, 1);
240    paranoid_free(command);
241    if (res) {
242        return (FALSE);
243    } else {
244        return (TRUE);
245    }
246}
247
248
249
250/**
251 * Determine the name and size of the tape device. Tries the SCSI tape for
252 * this platform, then the IDE tape, then "/dev/st0", then "/dev/osst0".
253 * @param dev Where to put the found tape device.
254 * @param siz Where to put the tape size (a string like "4GB")
255 * @return 0 if success, nonzero if failure (in which @p dev and @p siz are undefined).
256 */
257int find_tape_device_and_size(char *dev, char *siz)
258{
259    char tmp[MAX_STR_LEN];
260    char command[MAX_STR_LEN * 2];
261    char cdr_exe[MAX_STR_LEN];
262//  char tape_description_[MAX_STR_LEN];
263//  char tape_manufacturer_cdr[MAX_STR_LEN];
264//  FILE*fin;
265    int res;
266
267    log_to_screen("I am looking for your tape streamer. Please wait.");
268    dev[0] = siz[0] = '\0';
269    if (find_home_of_exe("cdrecord")) {
270        strcpy(cdr_exe, "cdrecord");
271    } else {
272        strcpy(cdr_exe, "dvdrecord");
273    }
274    sprintf(command, "%s -scanbus 2> /dev/null | grep -i tape | wc -l",
275            cdr_exe);
276    strcpy(tmp, call_program_and_get_last_line_of_output(command));
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    sprintf(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    if (strlen(tmp) < 2) {
288        log_it("Could not find tape device");
289        return 1;
290    }
291    sprintf(command,
292            "%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",
293            cdr_exe);
294    strcpy(tmp, call_program_and_get_last_line_of_output(command));
295    strcpy(dev, VANILLA_SCSI_TAPE);
296    dev[strlen(dev) - 1] = '\0';
297    strcat(dev, tmp);           // e.g. '/dev/st0' becomes '/dev/stN'
298    res = 0;
299    if (!mt_says_tape_exists(dev)) {
300        strcpy(dev, ALT_TAPE);
301        if (!mt_says_tape_exists(dev)) {
302            log_it("Cannot openin %s", dev);
303            strcpy(dev, "/dev/st0");
304            if (!mt_says_tape_exists(dev)) {
305                log_it("Cannot openin %s", dev);
306                strcpy(dev, "/dev/osst0");
307                if (!mt_says_tape_exists(dev)) {
308                    res++;
309                } else {
310                    res = 0;
311                }
312            }
313        }
314    }
315
316    log_it("At this point, dev = %s and res = %d", dev, res);
317
318    strcpy(tmp, call_program_and_get_last_line_of_output("\
319cdrecord -scanbus 2> /dev/null | tr -s '\t' ' ' | \
320grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | \
321awk '{for(i=1; i<NF; i++) { if (index($i, \"GB\")>0) { print $i;};};};'"));
322
323    if (mt_says_tape_exists(dev)) {
324        res = 0;
325    } else {
326        log_it("Turning %s", dev);
327        strcpy(tmp, (strrchr(dev, '/') != NULL) ? strrchr(dev, '/') : dev);
328        sprintf(dev, "/dev/os%s", tmp);
329        log_it("...into %s", dev);
330        if (mt_says_tape_exists(dev)) {
331            res = 0;
332        } else {
333            res++;
334        }
335    }
336
337    siz[0] = '\0';
338    log_it("res=%d; dev=%s", res, dev);
339
340    if (res) {
341        return (res);
342    }
343
344    if (strlen(tmp) < 2) {
345        siz[0] = '\0';
346        log_it("Warning - size of tape unknown");
347        return (0);
348    } else {
349        strcpy(siz, tmp);
350        return (0);
351    }
352}
353
354
355
356
357
358
359int read_EXAT_files_from_tape(long long *ptmp_size, char *tmp_fname,
360                              int *pctrl_chr, char *xattr_fname,
361                              char *acl_fname)
362{
363    int res = 0;
364    char *fname = (char *)&res;                 /* Should NOT be NULL */
365    char *tmp = NULL;
366
367    // xattr
368    if (g_getfattr) {
369        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
370        if (*pctrl_chr != BLK_START_EXAT_FILE) {
371            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
372        }
373        if (strstr(fname, "xattr") == NULL) {
374            asprintf(&tmp,"Wrong order expected xattr, got %s, sunshine.", fname);
375            fatal_error(tmp);
376        }
377        read_file_from_stream_to_file(xattr_fname, *ptmp_size);
378        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
379        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
380            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
381        }
382        log_msg(1, "Got xattr");
383        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
384        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
385            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
386        }
387        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
388        if (*pctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
389            log_msg(1, "No acl attributes found, skipping to afio files");
390            return(0);
391        } else {
392            if (*pctrl_chr != BLK_START_EXTENDED_ATTRIBUTES) {
393                wrong_marker(BLK_START_EXTENDED_ATTRIBUTES, *pctrl_chr);
394            }
395        }
396    }
397    // acl
398    if (g_getfacl) {
399        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
400        if (*pctrl_chr != BLK_START_EXAT_FILE) {
401            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
402        }
403        if (strstr(fname, "acl") == NULL) {
404            asprintf(&tmp,"Wrong order expected acl, got %s, sunshine.", fname);
405            fatal_error(tmp);
406        }
407        read_file_from_stream_to_file(acl_fname, *ptmp_size);
408        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
409        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
410            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
411        }
412        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
413        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
414            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
415        }
416        log_msg(1, "Got acl");
417    }
418    // tarball itself
419    res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
420    log_msg(1, "End of extended attributes, now looking for afioball");
421    return (0);
422}
423
424
425int write_EXAT_files_to_tape(char *xattr_fname,
426                             char *acl_fname)
427{
428    int res = 0;
429    if (g_getfattr) {
430    // xattr
431        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
432                             BLK_START_EXTENDED_ATTRIBUTES);
433        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
434                             BLK_START_EXAT_FILE);
435        write_file_to_stream_from_file(xattr_fname);
436        write_header_block_to_stream((off_t)-1, xattr_fname, BLK_STOP_EXAT_FILE);
437        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
438                             BLK_STOP_EXTENDED_ATTRIBUTES);
439    }
440    if (g_getfacl) {
441    // acl
442        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
443                             BLK_START_EXTENDED_ATTRIBUTES);
444        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
445                             BLK_START_EXAT_FILE);
446        write_file_to_stream_from_file(acl_fname);
447        write_header_block_to_stream((off_t)-1, acl_fname, BLK_STOP_EXAT_FILE);
448        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
449                             BLK_STOP_EXTENDED_ATTRIBUTES);
450    }
451    return (res);
452}
453
454
455
456
457/**
458 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
459 * @param tapeno The tape number to insist on.
460 * @bug There is currently no way to actually verify that the user has actually
461 * inserted the right tape.
462 */
463void insist_on_this_tape_number(int tapeno)
464{
465    int i;
466    char tmp[MAX_STR_LEN];
467
468    log_it("Insisting on tape #%d", tapeno);
469    if (g_current_media_number != tapeno) {
470        //      log_it("g_current_media_number = %d", g_current_media_number);
471        sprintf(tmp,
472                "When the tape drive goes quiet, please insert volume %d in this series.",
473                tapeno);
474        popup_and_OK(tmp);
475        open_evalcall_form("Waiting while the tape drive settles");
476    } else {
477        open_evalcall_form("Waiting while the tape drive rewinds");
478    }
479
480    for (i = 0; i <= 100; i += 2) {
481        usleep(100000);
482        update_evalcall_form(i);
483    }
484    close_evalcall_form();
485    log_it("I assume user has inserted it. They _say_ they have...");
486    g_current_media_number = tapeno;
487
488    //  log_it("g_current_media_number = %d", g_current_media_number);
489    log_it("OK, I've finished insisting. On with the revelry.");
490}
491
492
493
494
495/**
496 * Debugging aid - log the offset we're at on the tape (reading or writing).
497 */
498void log_tape_pos(void)
499{
500    /*@ buffers ***************************************************** */
501
502
503    /*@ end vars *************************************************** */
504
505    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
506           (long) g_tape_posK >> 10);
507}
508
509
510
511
512/**
513 * Add a file to a collection of recently archived filesets/slices.
514 * The type is determined by the filename: if it contains ".afio." it is
515 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
516 * otherwise we generate a fatal_error().
517 * @param td The current @c bkpinfo->tempdir (file will be placed in <tt>td</tt>/tmpfs/backcatalog/).
518 * @param latest_fname The file to place in the collection.
519 * @return 0, always.
520 * @bug Return value is redundant.
521 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
522 */
523int maintain_collection_of_recent_archives(char *td, char *latest_fname)
524{
525    long long final_alleged_writeK, final_projected_certain_writeK,
526        final_actually_certain_writeK = 0, cposK, bufsize_K;
527    int last, curr, i;
528    t_archtype type = other;
529    char command[MAX_STR_LEN];
530    char tmpdir[MAX_STR_LEN];
531    char old_fname[MAX_STR_LEN];
532    char *p;
533    char suffix[16];
534
535    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
536    sprintf(tmpdir, "%s/tmpfs/backcatalog", td);
537    if ((p = strrchr(latest_fname, '.'))) {
538        strcpy(suffix, ++p);
539    } else {
540        suffix[0] = '\0';
541    }
542    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
543        type = fileset;
544    } else if (strstr(latest_fname, "slice")) {
545        type = biggieslice;
546    } else {
547        log_it("fname = %s", latest_fname);
548        fatal_error
549            ("Unknown type. Internal error in maintain_collection_of_recent_archives()");
550    }
551    mkdir(tmpdir, 0x700);
552    sprintf(command, "cp -f %s %s", latest_fname, tmpdir);
553    if (run_program_and_log_output(command, 6)) {
554        log_it("Warning - failed to copy %s to backcatalog at %s",
555               latest_fname, tmpdir);
556    }
557    last = g_tapecatalog->entries - 1;
558    if (last <= 0) {
559        iamhere("Too early to start deleting from collection.");
560        return (0);
561    }
562    final_alleged_writeK = g_tapecatalog->el[last].tape_posK;
563    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
564    for (curr = last; curr >= 0; curr--) {
565        cposK = g_tapecatalog->el[curr].tape_posK;
566        if (cposK < final_projected_certain_writeK) {
567            final_actually_certain_writeK = cposK;
568            break;
569        }
570    }
571    if (curr < 0) {
572        iamhere
573            ("Not far enough into tape to start deleting old archives from collection.");
574        return (0);
575    }
576//  log_it( "There are %lld KB (more than %d KB) in my backcatalog", final_alleged_writeK - final_actually_certain_writeK, bufsize_K);
577
578    for (i = curr - 1; i >= 0 && curr - i < 10; i--) {
579        sprintf(old_fname, "%s/%s", tmpdir, g_tapecatalog->el[i].fname);
580        unlink(old_fname);
581    }
582    return (0);
583}
584
585
586
587
588/**
589 * Open the CD stream for input.
590 * @param bkpinfo The backup information structure. Passed to openin_tape().
591 * @return 0 for success, nonzero for failure.
592 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
593 */
594int openin_cdstream()
595{
596    return (openin_tape());
597}
598
599/**
600 * FIFO used to read/write to the tape device.
601 * @bug This seems obsolete now that we call an external @c buffer program. Please look onto this.
602 */
603char g_tape_fifo[MAX_STR_LEN];
604
605
606
607int set_tape_block_size_with_mt(long internal_tape_block_size)
608{
609    char *tmp;
610    int res;
611
612    if (strncmp(bkpinfo->media_device, "/dev/", 5)) {
613        log_msg(1,
614                "Not using 'mt setblk'. This isn't an actual /dev entry.");
615        return (0);
616    }
617    malloc_string(tmp);
618    sprintf(tmp, "mt -f %s setblk %ld", bkpinfo->media_device, internal_tape_block_size);
619    res = run_program_and_log_output(tmp, 3);
620    paranoid_free(tmp);
621    return (res);
622}
623
624/**
625 * Return the non-rewinding device when passed the normal one
626 * @param tapedev The tape device to open for writing.
627 * @note the caller needs to free the string returned
628 */
629char *get_non_rewind_dev(char *tapedev)
630{
631
632    char *ntapedev = NULL;
633    char *p = NULL;
634    char *q = NULL;
635    char *r = NULL;
636
637    ntapedev = (char *)malloc(strlen(tapedev)+sizeof(char));
638    p = strrchr(tapedev,'/');
639    if (p == NULL) {
640        log_it("Didn't find a '/' in %s",tapedev);
641        return(NULL);
642    }
643
644    /* Copy tapedev content up to the last / */
645    q = tapedev;
646    r = ntapedev;
647    while (q != p) {
648        *r = *q;
649        r++;
650        q++;
651    }
652    /* Copy the '/' */
653    *r = *q;
654    r++;
655    q++;
656    /* Adds a 'n' - non-rewinding */
657    *r = 'n';
658    r++;
659    /* Copy the rest of tapedev */
660    while (*q != '\0') {
661        *r = *q;
662        r++;
663        q++;
664    }
665    *r = '\0';
666    if (mt_says_tape_exists(ntapedev)) {
667        log_it("Non-rewinding tape device is %s",ntapedev);
668    } else {
669        log_it("Unable to find non-rewinding tape device.");
670        ntapedev = NULL;
671    }
672    return(ntapedev);
673}
674
675
676
677/**
678 * Handle OBDR if we were asked to do so
679 * @param tapedev The tape device to open for reading.
680 */
681int skip_obdr()
682{
683    char *command = NULL;
684    int res = 0;
685
686    log_it("Skipping OBDR headers");
687    asprintf(&command, "mt -f %s fsf 2",bkpinfo->media_device);
688    res = run_program_and_log_output(command, 1);
689    paranoid_free(command);
690
691    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
692    return(res);
693}
694
695/**
696 * Handle OBDR if we were asked to do so
697 * @param tapedev The tape device to open for writing.
698 * @return 0 for success, nonzero for failure.
699 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
700 * EXISTING DATA on the tape!
701 */
702int create_obdr()
703{
704
705    char *command = NULL;
706    int res = 0;
707
708    log_it("Creating OBDR headers");
709    /* OBDR: First block 10 kB of zero bs = 512 */
710    asprintf(&command, "mt -f %s compression off",bkpinfo->media_device);
711    res = run_program_and_log_output(command, 1);
712    paranoid_free(command);
713
714    asprintf(&command, "mt -f %s rewind",bkpinfo->media_device);
715    res += run_program_and_log_output(command, 1);
716    paranoid_free(command);
717
718    set_tape_block_size_with_mt(512);
719
720    asprintf(&command, "dd if=/dev/zero of=%s bs=512 count=20",bkpinfo->media_device);
721    res += run_program_and_log_output(command, 1);
722    paranoid_free(command);
723
724    /* OBDR: then ISO boot image bs = 2048 */
725    set_tape_block_size_with_mt(2048);
726
727    asprintf(&command, "dd if=%s of=%s bs=2048",MINDI_CACHE"/mondorescue.iso",bkpinfo->media_device);
728    res += run_program_and_log_output(command, 1);
729    paranoid_free(command);
730
731    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
732    return(res);
733}
734
735
736/**
737 * Open the tape device for input.
738 * @param bkpinfo The backup information structure. Fields used:
739 * - @c bkpinfo->media_device
740 * - @c bkpinfo->tmpdir
741 * @return 0 for success, nonzero for failure.
742 * @note This will also work with a cdstream for now, but don't count on this behavior.
743 */
744int openin_tape()
745{
746    /*@ buffer ***************************************************** */
747    char fname[MAX_STR_LEN];
748    char *datablock;
749    char *ntapedev = NULL;
750    char tmp[MAX_STR_LEN];
751    char old_cwd[MAX_STR_LEN];
752    char outfname[MAX_STR_LEN];
753    /*@ int ******************************************************* */
754    int i;
755    int j;
756    int res = 0;
757    long length, templong;
758    size_t k;
759    int retval = 0;
760    int ctrl_chr;
761
762    /*@ long long ************************************************* */
763    long long size;
764
765    /*@ pointers ************************************************** */
766    FILE *fout;
767
768    /*@ end vars *************************************************** */
769
770    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
771    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
772        fatal_error("Cannot alloc mem for tape catalog");
773    }
774    g_tapecatalog->entries = 0;
775    g_tape_posK = 0;
776    if (g_tape_stream) {
777        log_it("FYI - I won't 'openin' the tape. It's already open.");
778        return (0);
779    }
780    ntapedev = get_non_rewind_dev(bkpinfo->media_device);
781    if ((bkpinfo->use_obdr) && (ntapedev != NULL)) {
782        strncpy(bkpinfo->media_device,ntapedev,(size_t)(MAX_STR_LEN / 4));
783        res = skip_obdr();
784        if (res != 0) {
785            log_it("Not able to skip OBDR - Restore will have to be done manually");
786        }
787    } else {
788        if (ntapedev == NULL) {
789            log_it("Not able to skip OBDR - Restore will have to be done manually");
790        }
791        set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
792    }
793    paranoid_free(ntapedev);
794
795    insist_on_this_tape_number(1);
796    sprintf(outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
797    make_hole_for_file(outfname);
798
799//  start_buffer_process( bkpinfo->media_device, g_tape_fifo, FALSE);
800    log_it("Opening IN tape");
801    if (!
802        (g_tape_stream =
803         open_device_via_buffer(bkpinfo->media_device, 'r',
804                                bkpinfo->internal_tape_block_size))) {
805        log_OS_error(g_tape_fifo);
806        log_to_screen("Cannot openin stream device");
807        return (1);
808    }
809    log_to_screen("Reading stream");
810    log_it("stream device = '%s'", bkpinfo->media_device);
811/* skip data disks */
812    open_evalcall_form("Skipping data disks on stream");
813    log_to_screen("Skipping data disks on stream");
814    if (!(fout = fopen(outfname, "w"))) {
815        log_OS_error(outfname);
816        log_to_screen("Cannot openout datadisk all.tar.gz file");
817        return (-1);
818    }
819    if (!(datablock = (char *) malloc(256 * 1024))) {
820        log_to_screen("Unable to malloc 256*1024");
821        exit(1);
822    }
823    for (i = 0; i < 32; i++) {
824        for (j = 0; j < 4; j++) {
825            for (length = 0, k = 0; length < 256 * 1024; length += k) {
826                k = fread(datablock + length, 1, 256 * 1024 - length,
827                          g_tape_stream);
828            }
829            (void) fwrite(datablock, 1, (size_t) length, fout);
830            g_tape_posK += length / 1024;
831        }
832        if (i > 8)              // otherwise, 'buffer' distorts calculations
833        {
834            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
835            update_evalcall_form((int) (templong));
836        }
837    }
838    paranoid_fclose(fout);
839    paranoid_free(datablock);
840/* find initial blocks */
841    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
842    retval += res;
843    if (ctrl_chr != BLK_START_OF_TAPE) {
844        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
845    }
846    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
847    retval += res;
848    if (ctrl_chr != BLK_START_OF_BACKUP) {
849        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
850    }
851    close_evalcall_form();
852    log_it("Saved all.tar.gz to '%s'", outfname);
853    (void) getcwd(old_cwd, MAX_STR_LEN);
854    chdir(bkpinfo->tmpdir);
855    sprintf(tmp, "tar -zxf %s ./tmp/mondo-restore.cfg 2> /dev/null",
856            outfname);
857    paranoid_system(tmp);
858    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
859    chdir(old_cwd);
860    unlink(outfname);
861    return (retval);
862}
863
864
865/**
866 * Start writing to a CD stream.
867 * @param cddev The CD device to openout via cdrecord.
868 * @param speed The speed to write at.
869 * @return 0 for success, nonzero for failure.
870 * @note This should be called only from backup processes.
871 */
872int openout_cdstream(char *cddev, int speed)
873{
874    /*@ buffers ***************************************************** */
875    char command[MAX_STR_LEN * 2];
876
877    /*@ end vars *************************************************** */
878
879/*  add 'dummy' if testing */
880    sprintf(command,
881            "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
882            cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
883/*  initialise the catalog */
884    g_current_media_number = 1;
885    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
886        fatal_error("Cannot alloc mem for tape catalog");
887    }
888    g_tapecatalog->entries = 0;
889/* log stuff */
890    log_it("Opening OUT cdstream with the command");
891    log_it(command);
892/*  log_it("Let's see what happens, shall we?"); */
893    g_tape_stream = popen(command, "w");
894    if (g_tape_stream) {
895        return (0);
896    } else {
897        log_to_screen("Failed to openout to cdstream (fifo)");
898        return (1);
899    }
900}
901
902/**
903 * Start writing to a tape device for the backup.
904 * Handle OBDR if we were asked to do so
905 * @param tapedev The tape device to open for writing.
906 * @return 0 for success, nonzero for failure.
907 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
908 * EXISTING DATA on the tape!
909 */
910int openout_tape() {
911
912g_current_media_number = 1;
913if (g_tape_stream) {
914    log_it("FYI - I won't 'openout' the tape. It's already open.");
915    return (0);
916}
917if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
918    fatal_error("Cannot alloc mem for tape catalog");
919}
920g_tapecatalog->entries = 0;
921g_tape_posK = 0;
922
923if (bkpinfo->use_obdr) {
924    create_obdr();
925} else {
926    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
927}
928log_it("Opening OUT tape");
929if (!
930    (g_tape_stream =
931     open_device_via_buffer(bkpinfo->media_device, 'w', bkpinfo->internal_tape_block_size))) {
932    log_OS_error(g_tape_fifo);
933    log_to_screen("Cannot openin stream device");
934    return (1);
935}
936return (0);
937}
938
939
940
941
942/**
943 * Copy a file from the opened stream (CD or tape) to @p outfile.
944 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
945 * @param outfile The file to write to.
946 * @param size The size of the file in the input stream.
947 * @return 0 for success, nonzero for failure.
948 */
949int
950read_file_from_stream_to_file(char *outfile, long long size)
951{
952
953    /*@ int ******************************************************** */
954    int res;
955
956    /*@ end vars *************************************************** */
957
958    res = read_file_from_stream_FULL(outfile, NULL, size);
959
960    return (res);
961}
962
963
964
965/**
966 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
967 * by @p fout.
968 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
969 * @param fout The stream to write the file to.
970 * @param size The size of the file in bytes.
971 * @return 0 for success, nonzero for failure.
972 */
973int
974read_file_from_stream_to_stream(FILE * fout, long long size)
975{
976
977    /*@ int ******************************************************** */
978    int res;
979
980    /*@ end vars *************************************************** */
981
982    res = read_file_from_stream_FULL(NULL, fout, size);
983/*  fflush(g_tape_stream);
984  fflush(fout);*/
985    return (res);
986}
987
988
989
990/**
991 * Copy a file from the currently opened stream (CD or tape) to either a
992 * @c FILE pointer indicating a currently-opened file, or a filename indicating
993 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
994 * and read_file_from_stream_to_stream() are wrappers for.
995 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
996 * @param outfname If non-NULL, write to this file.
997 * @param foutstream If non-NULL, write to this stream.
998 * @param orig_size The original length of the file in bytes.
999 * @return 0 for success, nonzero for failure.
1000 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
1001 */
1002int
1003read_file_from_stream_FULL(char *outfname, FILE * foutstream, long long orig_size)
1004{
1005    /*@ buffers ***************************************************** */
1006    char *tmp;
1007    char *datablock;
1008    char *temp_fname;
1009    char *temp_cksum;
1010    char *actual_cksum;
1011//  char *pA, *pB;
1012
1013    /*@ int ********************************************************* */
1014    int retval = 0;
1015#ifdef EXTRA_TAPE_CHECKSUMS
1016    int i, ch;
1017#endif
1018    int noof_blocks;
1019    int ctrl_chr;
1020    int res;
1021    /*@ pointers **************************************************** */
1022    FILE *fout;
1023
1024    /*@ long    ***************************************************** */
1025    long bytes_to_write = 0L /*,i */ ;
1026//  long bytes_successfully_read_in_this_time = 0;
1027
1028    /*@ long long *************************************************** */
1029    long long temp_size, size;
1030    long bytes_read, bytes_to_read;
1031    long long total_read_from_tape_for_this_file = 0;
1032    long long where_I_was_before_tape_change = 0;
1033    /*@ unsigned int ************************************************ */
1034    /*  unsigned int ch; */
1035    unsigned int crc16;
1036    unsigned int crctt;
1037
1038    bool had_to_resync = FALSE;
1039
1040    /*@ init  ******************************************************* */
1041    malloc_string(tmp);
1042    malloc_string(temp_fname);
1043    malloc_string(temp_cksum);
1044    malloc_string(actual_cksum);
1045    datablock = malloc(TAPE_BLOCK_SIZE);
1046    crc16 = 0;
1047    crctt = 0;
1048    size = orig_size;
1049
1050    /*@ end vars *************************************************** */
1051
1052    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1053    if (orig_size != temp_size && orig_size != -1) {
1054        sprintf(tmp,
1055                "output file's size should be %ld K but is apparently %ld K",
1056                (long) size >> 10, (long) temp_size >> 10);
1057        log_to_screen(tmp);
1058    }
1059    if (ctrl_chr != BLK_START_FILE) {
1060        wrong_marker(BLK_START_FILE, ctrl_chr);
1061        return (1);
1062    }
1063    /* Not used
1064    sprintf(tmp, "Reading file from tape; writing to '%s'; %ld KB",
1065            outfname, (long) size >> 10);
1066            */
1067
1068    if (foutstream) {
1069        fout = foutstream;
1070    } else {
1071        fout = fopen(outfname, "w");
1072    }
1073    if (!fout) {
1074        log_OS_error(outfname);
1075        log_to_screen("Cannot openout file");
1076        return (1);
1077    }
1078    total_read_from_tape_for_this_file = 0;
1079    for (noof_blocks = 0; size > 0;
1080         noof_blocks++, size -=
1081         bytes_to_write, total_read_from_tape_for_this_file +=
1082         bytes_read) {
1083        bytes_to_write =
1084            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1085        bytes_to_read = TAPE_BLOCK_SIZE;
1086        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1087        while (bytes_read < bytes_to_read) {    // next tape!
1088//    crctt=crc16=0;
1089            where_I_was_before_tape_change = size;
1090            log_msg(4, "where_I_was_... = %lld",
1091                    where_I_was_before_tape_change);
1092            start_to_read_from_next_tape();
1093            log_msg(4, "Started reading from next tape.");
1094            skip_incoming_files_until_we_find_this_one(temp_fname);
1095            log_msg(4, "Skipped irrelevant files OK.");
1096            for (size = orig_size; size > where_I_was_before_tape_change;
1097                 size -= bytes_to_write) {
1098                bytes_read =
1099                    fread(datablock, 1, bytes_to_read, g_tape_stream);
1100            }
1101            log_msg(4, "'size' is now %lld (should be %lld)", size,
1102                    where_I_was_before_tape_change);
1103            log_to_screen("Successfully re-sync'd tape");
1104            had_to_resync = TRUE;
1105            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1106        }
1107
1108        (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
1109
1110#ifdef EXTRA_TAPE_CHECKSUMS
1111        for (i = 0; i < (int) bytes_to_write; i++) {
1112            ch = datablock[i];
1113            crc16 = updcrcr(crc16, (unsigned) ch);
1114            crctt = updcrc(crctt, (unsigned) ch);
1115        }
1116#endif
1117    }
1118    log_msg(6, "Total read from tape for this file = %lld",
1119            total_read_from_tape_for_this_file);
1120    log_msg(6, ".......................... Should be %lld", orig_size);
1121    g_tape_posK += total_read_from_tape_for_this_file / 1024;
1122    sprintf(actual_cksum, "%04x%04x", crc16, crctt);
1123    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
1124    } else {
1125        paranoid_fclose(fout);
1126    }
1127    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
1128    if (ctrl_chr != BLK_STOP_FILE) {
1129        wrong_marker(BLK_STOP_FILE, ctrl_chr);
1130//      fatal_error("Bad marker"); // return(1);
1131    }
1132    if (strcmp(temp_cksum, actual_cksum)) {
1133        sprintf(tmp, "actual cksum=%s; recorded cksum=%s", actual_cksum,
1134                temp_cksum);
1135        log_to_screen(tmp);
1136        sprintf(tmp, "%s (%ld K) is corrupt on tape", temp_fname,
1137                (long) orig_size >> 10);
1138        log_to_screen(tmp);
1139        retval++;
1140    } else {
1141        sprintf(tmp, "%s is GOOD on tape", temp_fname);
1142        /*      log_it(tmp); */
1143    }
1144    paranoid_free(datablock);
1145    paranoid_free(tmp);
1146    paranoid_free(temp_fname);
1147    paranoid_free(temp_cksum);
1148    paranoid_free(actual_cksum);
1149    return (retval);
1150}
1151
1152
1153
1154/**
1155 * Read a header block from the currently opened stream (CD or tape).
1156 * This block indicates the length of the following file (if it's file-related)
1157 * the filename (if it's file-related), and the block type.
1158 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
1159 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
1160 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
1161 * @return 0 for success, nonzero for failure.
1162 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
1163 */
1164int
1165read_header_block_from_stream(long long *plen, char *filename,
1166                              int *pcontrol_char)
1167{
1168
1169    /*@ buffers ***************************************************** */
1170    char *tempblock;
1171
1172    /*@ int ********************************************************* */
1173    int i, retval;
1174
1175    /*@ end vars *************************************************** */
1176
1177    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
1178
1179    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1180        tempblock[i] = 0;
1181    }
1182    while (!(*pcontrol_char = tempblock[7000])) {
1183        g_tape_posK +=
1184            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1185                  g_tape_stream) / 1024;
1186    }
1187/*  memcpy((char*)plength_of_incoming_file,(char*)tempblock+7001,sizeof(long long)); */
1188/*  for(*plen=0,i=7;i>=0;i--) {*plen<<=8; *plen |= tempblock[7001+i];} */
1189    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1190    if (strcmp(tempblock + 6000 + *pcontrol_char, STR_HEADER)) {
1191        log_it("Bad header block at %ld K", (long) g_tape_posK);
1192    }
1193    strcpy(filename, tempblock + 1000);
1194/*  strcpy(cksum,tempblock+5555);*/
1195/*  log_it( "%s  (reading) fname=%s, filesize=%ld K",
1196       marker_to_string (*pcontrol_char), filename,
1197       (long) ((*plen) >> 10));
1198*/
1199    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1200        log_to_screen("I can't verify an aborted backup.");
1201        retval = 1;
1202    } else {
1203        retval = 0;
1204    }
1205    for (i = 1000; i < 1020; i++) {
1206        if (tempblock[i] < 32 || tempblock[i] > 126) {
1207            tempblock[i] = ' ';
1208        }
1209    }
1210    tempblock[i] = '\0';
1211    log_msg(6, "%s (fname=%s, size=%ld K)",
1212            marker_to_string(*pcontrol_char), tempblock + 1000,
1213            (long) (*plen) >> 10);
1214    paranoid_free(tempblock);
1215    return (retval);
1216}
1217
1218
1219
1220/**
1221 * Add specified file/slice to the internal catalog of all archives written.
1222 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1223 * write the last [buffer size] MB from the catalog to the new tape, so we know
1224 * we have @e all archives on some CD/tape/whatever.
1225 * @param type The type of file we're cataloging (afioball, slice, something else)
1226 * @param number The fileset number or biggiefile number.
1227 * @param aux The slice number if it's a biggiefile, or any other additional info.
1228 * @param fn The original full pathname of the file we're recording.
1229 * @return The index of the record we just added.
1230 */
1231int register_in_tape_catalog(t_archtype type, int number, long aux,
1232                             char *fn)
1233{
1234    int last;
1235    char fname[MAX_TAPECAT_FNAME_LEN];
1236    char *p;
1237
1238    p = strrchr(fn, '/');
1239    if (p) {
1240        p++;
1241    } else {
1242        p = fn;
1243    }
1244    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1245    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1246    last = g_tapecatalog->entries;
1247    if (last >= MAX_TAPECATALOG_ENTRIES) {
1248        log_it
1249            ("Warning - can't log #%d in tape catalog - too many entries already",
1250             number);
1251        return (-1);
1252    }
1253    g_tapecatalog->el[last].type = type;
1254    g_tapecatalog->el[last].number = number;
1255    g_tapecatalog->el[last].aux = aux;
1256    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1257    strcpy(g_tapecatalog->el[last].fname, fname);
1258    g_tapecatalog->entries++;
1259    return (last);              // returns the index of the record we've jsut added
1260}
1261
1262
1263
1264
1265/**
1266 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1267 * (got SIGPIPE) or look like we will.
1268 * @param mediasize The size of the tape in megabytes.
1269 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1270 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1271 * autodetecting the size. Huh?
1272 */
1273
1274/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1275bool
1276should_we_write_to_next_tape(long mediasize,
1277                             off_t length_of_incoming_file)
1278{
1279    /*@ bool's ***************************************************** */
1280    bool we_need_a_new_tape = FALSE;
1281
1282    /*@ end vars *************************************************** */
1283
1284    if (mediasize == 0) {
1285        return (FALSE);
1286    }
1287    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1288        log_it("mediasize = %ld", mediasize);
1289        we_need_a_new_tape = TRUE;
1290        log_to_screen("Should have started a new tape/CD already");
1291    }
1292    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1293        mediasize - (SLICE_SIZE * 4 / 1024)) {
1294        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1295               mediasize);
1296        we_need_a_new_tape = TRUE;
1297    }
1298    return (we_need_a_new_tape);
1299}
1300
1301
1302/**
1303 * Seek through the stream until we find a header block where the NAME field matches
1304 * @p the_file_I_was_reading. This is useful if you've just started reading from
1305 * a new tape and want to find the file you were reading when the tape ended.
1306 * @param the_file_I_was_reading File name to look for.
1307 * @return 0 for success, nonzero for failure.
1308 */
1309int skip_incoming_files_until_we_find_this_one(char
1310                                               *the_file_I_was_reading)
1311{
1312    char *pA;
1313    char *pB;
1314    int res;
1315    int ctrl_chr;
1316    char *temp_fname;
1317    char *datablock;
1318    long long temp_size, size;
1319    long bytes_to_write;
1320
1321    datablock = malloc(TAPE_BLOCK_SIZE);
1322    malloc_string(temp_fname);
1323    pB = strrchr(the_file_I_was_reading, '/');
1324    if (pB) {
1325        pB++;
1326    } else {
1327        pB = the_file_I_was_reading;
1328    }
1329    log_msg(1, "skip_incoming_..(%s)", pB);
1330    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1331    ctrl_chr = -1;
1332    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1333        res =
1334            read_header_block_from_stream(&temp_size, temp_fname,
1335                                          &ctrl_chr);
1336        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1337            break;
1338        }
1339        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1340        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1341        log_msg(3, "Still trying to re-sync w/ tape");
1342    }
1343    while (ctrl_chr != BLK_START_FILE) {
1344        res =
1345            read_header_block_from_stream(&temp_size, temp_fname,
1346                                          &ctrl_chr);
1347        if (ctrl_chr == BLK_START_FILE) {
1348            break;
1349        }
1350        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1351        wrong_marker(BLK_START_FILE, ctrl_chr);
1352        log_msg(3, "Still trying to re-sync w/ tape");
1353    }
1354    pA = strrchr(temp_fname, '/');
1355    if (pA) {
1356        pA++;
1357    } else {
1358        pA = temp_fname;
1359    }
1360    pB = strrchr(the_file_I_was_reading, '/');
1361    if (pB) {
1362        pB++;
1363    } else {
1364        pB = the_file_I_was_reading;
1365    }
1366    while (strcmp(pA, pB)) {
1367        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1368                the_file_I_was_reading);
1369        for (size = temp_size; size > 0; size -= bytes_to_write) {
1370            bytes_to_write =
1371                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1372            // FIXME - needs error-checking and -catching
1373            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1374        }
1375        res =
1376            read_header_block_from_stream(&temp_size, temp_fname,
1377                                          &ctrl_chr);
1378        if (ctrl_chr != BLK_STOP_FILE) {
1379            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1380        }
1381        res =
1382            read_header_block_from_stream(&temp_size, temp_fname,
1383                                          &ctrl_chr);
1384        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1385            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1386        }
1387        res =
1388            read_header_block_from_stream(&temp_size, temp_fname,
1389                                          &ctrl_chr);
1390        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1391            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1392        }
1393        res =
1394            read_header_block_from_stream(&temp_size, temp_fname,
1395                                          &ctrl_chr);
1396        if (ctrl_chr != BLK_START_FILE) {
1397            wrong_marker(BLK_START_FILE, ctrl_chr);
1398        }
1399        pA = strrchr(temp_fname, '/');
1400        if (pA) {
1401            pA++;
1402        } else {
1403            pA = temp_fname;
1404        }
1405        pB = strrchr(the_file_I_was_reading, '/');
1406        if (pB) {
1407            pB++;
1408        } else {
1409            pB = the_file_I_was_reading;
1410        }
1411    }
1412    log_msg(2, "Reading %s (it matches %s)", temp_fname,
1413            the_file_I_was_reading);
1414    paranoid_free(temp_fname);
1415    paranoid_free(datablock);
1416    return (0);
1417}
1418
1419
1420/**
1421 * Start to read from the next tape. Assumes the user has already inserted it.
1422 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1423 * @return 0 for success, nonzero for failure.
1424 */
1425int start_to_read_from_next_tape()
1426{
1427    /*@ int ********************************************************* */
1428    int res = 0;
1429    char *sz_msg;
1430    int ctrlchr;
1431    long long temp_size;
1432    malloc_string(sz_msg);
1433    /*@ end vars *************************************************** */
1434
1435    paranoid_pclose(g_tape_stream);
1436    sync();
1437    sync();
1438    sync();
1439    log_it("Next tape requested.");
1440    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1441    log_it("Opening IN the next tape");
1442    if (!
1443        (g_tape_stream =
1444         open_device_via_buffer(bkpinfo->media_device, 'r',
1445                                bkpinfo->internal_tape_block_size))) {
1446        log_OS_error(g_tape_fifo);
1447        log_to_screen("Cannot openin stream device");
1448        return (1);
1449    }
1450    g_tape_posK = 0;
1451    g_sigpipe = FALSE;
1452    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1453    if (ctrlchr != BLK_START_OF_TAPE) {
1454        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1455    }
1456    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1457    if (ctrlchr != BLK_START_OF_BACKUP) {
1458        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1459    } else {
1460        log_msg(3, "Next tape opened OK. Whoopee!");
1461    }
1462    paranoid_free(sz_msg);
1463    return (res);
1464}
1465
1466
1467
1468/**
1469 * Start to write to the next tape. Assume the user has already inserted it.
1470 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1471 * @return 0 for success, nonzero for failure.
1472 */
1473int start_to_write_to_next_tape()
1474{
1475    int res = 0;
1476    char command[MAX_STR_LEN * 2];
1477    paranoid_pclose(g_tape_stream);
1478    system("sync");
1479    system("sync");
1480    system("sync");
1481    log_it("New tape requested.");
1482    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1483    if (g_current_media_number > MAX_NOOF_MEDIA) {
1484        res++;
1485        log_to_screen("Too many tapes. Man, you need to use nfs!");
1486    }
1487    if (bkpinfo->backup_media_type == cdstream) {
1488        sprintf(command,
1489                "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1490                bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE,
1491                MONDO_LOGFILE);
1492        log_it("Opening OUT to next CD with the command");
1493        log_it(command);
1494        log_it("Let's see what happens, shall we?");
1495        g_tape_stream = popen(command, "w");
1496        if (!g_tape_stream) {
1497            log_to_screen("Failed to openout to cdstream (fifo)");
1498            return (1);
1499        }
1500    } else {
1501        log_it("Opening OUT to next tape");
1502        if (!
1503            (g_tape_stream =
1504             open_device_via_buffer(bkpinfo->media_device, 'w',
1505                                    bkpinfo->internal_tape_block_size))) {
1506            log_OS_error(g_tape_fifo);
1507            log_to_screen("Cannot openin stream device");
1508            return (1);
1509        }
1510    }
1511    g_tape_posK = 0;
1512    g_sigpipe = FALSE;
1513    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1514    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1515    return (res);
1516}
1517
1518
1519
1520
1521/**
1522 * Write a bufferfull of the most recent archives to the tape. The
1523 * rationale behind this is a bit complex. If the previous tape ended
1524 * suddenly (EOF or otherwise) some archives were probably left in the
1525 * buffer. That means that Mondo thinks they have been written, but
1526 * the external binary @c buffer has not actually written them. So to
1527 * be safe, we start the new tape by writing the last bufferfull from
1528 * the old one. This insures that all archives will be on at least
1529 * one tape. Sounds inelegant, but it works.
1530 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1531 * @return 0 for success, nonzero for failure.
1532 */
1533int write_backcatalog_to_tape()
1534{
1535    int i, last, res = 0;
1536    char *fname;
1537
1538    log_msg(2, "I am now writing back catalog to tape");
1539    malloc_string(fname);
1540    last = g_tapecatalog->entries - 1;
1541    for (i = 0; i <= last; i++) {
1542        sprintf(fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir,
1543                g_tapecatalog->el[i].fname);
1544        if (!does_file_exist(fname)) {
1545            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1546        } else {
1547            write_header_block_to_stream(length_of_file(fname),
1548                                         "start-backcatalog-afio-or-slice",
1549                                         BLK_START_AN_AFIO_OR_SLICE);
1550            log_msg(2, "Writing %s", fname);
1551            if (write_file_to_stream_from_file(fname)) {
1552                res++;
1553                log_msg(2, "%s failed", fname);
1554            }
1555            if (i != last) {
1556                write_header_block_to_stream((off_t)0,
1557                                             "stop-backcatalog-afio-or-slice",
1558                                             BLK_STOP_AN_AFIO_OR_SLICE);
1559            }
1560        }
1561    }
1562    paranoid_free(fname);
1563    log_msg(2, "Finished writing back catalog to tape");
1564    return (res);
1565}
1566
1567
1568
1569/**
1570 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1571 * @param fname The path to all.tar.gz.
1572 * @return 0 for success, nonzero for failure.
1573 */
1574int write_data_disks_to_stream(char *fname)
1575{
1576    /*@ pointers *************************************************** */
1577    FILE *fin;
1578    char tmp[MAX_STR_LEN];
1579
1580    /*@ long ******************************************************* */
1581    long m = -1;
1582    long templong;
1583
1584    /*@ int ******************************************************** */
1585    int i, j;
1586
1587    /*@ buffers **************************************************** */
1588    char tempblock[256 * 1024];
1589
1590    /*@ end vars *************************************************** */
1591
1592    open_evalcall_form("Writing data disks to tape");
1593    log_to_screen("Writing data disks to tape");
1594    log_it("Data disks = %s", fname);
1595    if (!does_file_exist(fname)) {
1596        sprintf(tmp, "Cannot find %s", fname);
1597        log_to_screen(tmp);
1598        return (1);
1599    }
1600    if (!(fin = fopen(fname, "r"))) {
1601        log_OS_error(fname);
1602        fatal_error("Cannot openin the data disk");
1603    }
1604    for (i = 0; i < 32; i++) {  /* 32MB */
1605        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1606            if (!feof(fin)) {
1607                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1608            } else {
1609                m = 0;
1610            }
1611            for (; m < 256 * 1024; m++) {
1612                tempblock[m] = '\0';
1613            }
1614            g_tape_posK +=
1615                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1616        }
1617        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1618        {
1619            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1620            update_evalcall_form((int) (templong));
1621        }
1622    }
1623    paranoid_fclose(fin);
1624    close_evalcall_form();
1625    return (0);
1626}
1627
1628
1629
1630
1631/**
1632 * Copy @p infile to the opened stream (CD or tape).
1633 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1634 * @param infile The file to write to the stream.
1635 * @return 0 for success, nonzero for failure.
1636 */
1637int write_file_to_stream_from_file(char *infile)
1638{
1639    /*@ buffers **************************************************** */
1640    char tmp[MAX_STR_LEN];
1641    char datablock[TAPE_BLOCK_SIZE];
1642    char checksum[MAX_STR_LEN];
1643    char *infile_basename;
1644
1645    /*@ int ******************************************************** */
1646    int retval = 0;
1647    int noof_blocks;
1648
1649    /*  unsigned int ch; */
1650    unsigned int crc16;
1651    unsigned int crctt;
1652
1653    /*@ pointers *************************************************** */
1654    FILE *fin;
1655    char *p;
1656
1657    /*@ long ******************************************************* */
1658    long bytes_to_read = 0;
1659    long i;
1660
1661    off_t filesize;
1662
1663#ifdef EXTRA_TAPE_CHECKSUMS
1664    int ch;
1665#endif
1666
1667    /*@ initialize ************************************************ */
1668    crc16 = 0;
1669    crctt = 0;
1670
1671
1672
1673    /*@ end vars *************************************************** */
1674
1675    infile_basename = strrchr(infile, '/');
1676    if (infile_basename) {
1677        infile_basename++;
1678    } else {
1679        infile_basename = infile;
1680    }
1681    filesize = length_of_file(infile);
1682    if (should_we_write_to_next_tape
1683        (bkpinfo->media_size[g_current_media_number], filesize)) {
1684        start_to_write_to_next_tape();
1685        write_backcatalog_to_tape();
1686    }
1687    p = strrchr(infile, '/');
1688    if (!p) {
1689        p = infile;
1690    } else {
1691        p++;
1692    }
1693    sprintf(tmp, "Writing file '%s' to tape (%ld KB)", p,
1694            (long) filesize >> 10);
1695    log_it(tmp);
1696    write_header_block_to_stream(filesize, infile_basename,
1697                                 BLK_START_FILE);
1698//go_here_to_restart_saving_of_file:
1699    if (!(fin = fopen(infile, "r"))) {
1700        log_OS_error(infile);
1701        return (1);
1702    }
1703    for (noof_blocks = 0; filesize > 0;
1704         noof_blocks++, filesize -= bytes_to_read) {
1705        if (filesize < TAPE_BLOCK_SIZE) {
1706            bytes_to_read = (long) filesize;
1707            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1708                datablock[i] = '\0';
1709            }
1710        } else {
1711            bytes_to_read = TAPE_BLOCK_SIZE;
1712        }
1713        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1714        g_tape_posK +=
1715            fwrite(datablock, 1, /*bytes_to_read */ 
1716                   (size_t) TAPE_BLOCK_SIZE,
1717                   g_tape_stream) / 1024;
1718        if (g_sigpipe) {
1719            iamhere("Sigpipe occurred recently. I'll start a new tape.");
1720            fclose(fin);
1721            g_sigpipe = FALSE;
1722            start_to_write_to_next_tape();
1723            write_backcatalog_to_tape();    // kinda-sorta recursive :)
1724            return (0);
1725        }
1726#ifdef EXTRA_TAPE_CHECKSUMS
1727        for (i = 0; i < bytes_to_read; i++) {
1728            ch = datablock[i];
1729            crc16 = updcrcr(crc16, (unsigned) ch);
1730            crctt = updcrc(crctt, (unsigned) ch);
1731        }
1732#endif
1733    }
1734    paranoid_fclose(fin);
1735    sprintf(checksum, "%04x%04x", crc16, crctt);
1736    /* BERLIOS: what does it do ??? */
1737    write_header_block_to_stream((off_t)g_current_media_number, checksum,
1738                                 BLK_STOP_FILE);
1739//  log_it("File '%s' written to tape.", infile);
1740    return (retval);
1741}
1742
1743
1744
1745
1746
1747/**
1748 * Write a header block to the opened stream (CD or tape).
1749 * @param length_of_incoming_file The length to store in the header block.
1750 * Usually matters only if this is a file-related header, in which case it should
1751 * be the length of the file that will follow.
1752 * @param filename The filename to store in the header block. Usually matters
1753 * only if this is a file-related header, in which case this should be the name
1754 * if the file that will follow.
1755 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1756 * @return 0 for success, nonzero for failure.
1757 */
1758int
1759write_header_block_to_stream(off_t length_of_incoming_file,
1760                             char *filename, int control_char)
1761{
1762    /*@ buffers **************************************************** */
1763    char tempblock[TAPE_BLOCK_SIZE];
1764    char tmp[MAX_STR_LEN];
1765    char *p;
1766
1767    /*@ int ******************************************************** */
1768    int i;
1769
1770    off_t olen;
1771
1772    /*@ end vars *************************************************** */
1773
1774
1775    olen = length_of_incoming_file;
1776    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1777    if (!p) {
1778        p = filename;
1779    } else {
1780        p++;
1781    }
1782    if (!g_tape_stream) {
1783        log_to_screen
1784            ("You're not backing up to tape. Why write a tape header?");
1785        return (1);
1786    }
1787    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1788        tempblock[i] = 0;
1789    }
1790    sprintf(tempblock + 6000 + control_char, STR_HEADER);
1791    tempblock[7000] = control_char;
1792/*  for(i=0;i<8;i++) {tempblock[7001+i]=olen&0xff; olen>>=8;} */
1793    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1794/*  if (length_of_incoming_file) {memcpy(tempblock+7001,(char*)&length_of_incoming_file,sizeof(long long));} */
1795    strcpy(tempblock + 1000, filename);
1796/*  strcpy(tempblock+5555,cksum); */
1797    g_tape_posK +=
1798        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1799               g_tape_stream) / 1024;
1800    sprintf(tmp, "%s (fname=%s, size=%ld K)",
1801            marker_to_string(control_char), p,
1802            (long) length_of_incoming_file >> 10);
1803    log_msg(6, tmp);
1804/*  log_tape_pos(); */
1805    return (0);
1806}
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817/**
1818 * Log (to screen) an erroneous marker, along with what it should have been.
1819 * @param should_be What we were expecting.
1820 * @param it_is What we got.
1821 */
1822void wrong_marker(int should_be, int it_is)
1823{
1824    /*@ buffer ***************************************************** */
1825    char tmp[MAX_STR_LEN];
1826
1827
1828    /*@ end vars *************************************************** */
1829    sprintf(tmp, "Wrong marker! (Should be %s, ",
1830            marker_to_string(should_be));
1831    sprintf(tmp + strlen(tmp), "is actually %s)", marker_to_string(it_is));
1832    log_to_screen(tmp);
1833}
1834
1835/* @} - end of streamGroup */
Note: See TracBrowser for help on using the repository browser.