source: branches/2.2.6/mondo/src/common/libmondo-stream.c @ 1952

Last change on this file since 1952 was 1952, checked in by bruno, 11 years ago
  • Avoid to rewind the tape for OBDR by setting the blocksize in the obdr function on the non-rewinding dev.
  • Property svn:keywords set to Id
File size: 51.4 KB
Line 
1/* libmondo-stream.c
2   $Id: libmondo-stream.c 1952 2008-05-26 17:12:52Z 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 1952 2008-05-26 17:12:52Z 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(char *tapedev,
608                                long internal_tape_block_size)
609{
610    char *tmp;
611    int res;
612
613    if (strncmp(tapedev, "/dev/", 5)) {
614        log_msg(1,
615                "Not using 'mt setblk'. This isn't an actual /dev entry.");
616        return (0);
617    }
618    malloc_string(tmp);
619    sprintf(tmp, "mt -f %s setblk %ld", tapedev, internal_tape_block_size);
620    res = run_program_and_log_output(tmp, 3);
621    paranoid_free(tmp);
622    return (res);
623}
624
625/**
626 * Return the non-rewinding device when passed the normal one
627 * @param tapedev The tape device to open for writing.
628 * @note the caller needs to free the string returned
629 */
630char *get_non_rewind_dev(char *tapedev)
631{
632
633    char *ntapedev = NULL;
634    char *p = NULL;
635    char *q = NULL;
636    char *r = NULL;
637
638    ntapedev = (char *)malloc(strlen(tapedev)+sizeof(char));
639    p = strrchr(tapedev,'/');
640    if (p == NULL) {
641        log_it("Didn't find a '/' in %s",tapedev);
642        return(NULL);
643    }
644
645    /* Copy tapedev content up to the last / */
646    q = tapedev;
647    r = ntapedev;
648    while (q != p) {
649        *r = *q;
650        r++;
651        q++;
652    }
653    /* Copy the '/' */
654    *r = *q;
655    r++;
656    q++;
657    /* Adds a 'n' - non-rewinding */
658    *r = 'n';
659    r++;
660    /* Copy the rest of tapedev */
661    while (*q != '\0') {
662        *r = *q;
663        r++;
664        q++;
665    }
666    *r = '\0';
667    if (mt_says_tape_exists(ntapedev)) {
668        log_it("Non-rewinding tape device is %s",ntapedev);
669    } else {
670        log_it("Unable to find non-rewinding tape device.");
671        ntapedev = NULL;
672    }
673    return(ntapedev);
674}
675
676
677
678/**
679 * Handle OBDR if we were asked to do so
680 * @param tapedev The tape device to open for writing.
681 * @return 0 for success, nonzero for failure.
682 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
683 * EXISTING DATA on the tape!
684 */
685void skip_obdr(char *tapedev)
686{
687    char *command = NULL;
688    char *ntapedev = NULL;
689
690    ntapedev = get_non_rewind_dev(tapedev);
691    if (ntapedev == NULL) {
692        log_it("Not skipping OBDR");
693    }
694
695    asprintf(&command, "mt -f %s fsf 2",ntapedev);
696    run_program_and_log_output(command, 1);
697    paranoid_free(command);
698
699    set_tape_block_size_with_mt(ntapedev, internal_tape_block_size);
700
701    paranoid_free(ntapedev);
702}
703
704int create_obdr(char *tapedev)
705{
706
707    char *ntapedev = NULL;
708    char *command = NULL;
709    int res = 0;
710
711    ntapedev = get_non_rewind_dev(tapedev);
712    if (ntapedev == NULL) {
713        log_it("Skipping OBDR");
714        return(1);
715    }
716
717    /* OBDR: First block 10 kB of zero bs = 512 */
718    asprintf(&command, "mt -f %s compression off",tapedev);
719    res = run_program_and_log_output(command, 1);
720    paranoid_free(command);
721
722    asprintf(&command, "mt -f %s rewind",tapedev);
723    res = run_program_and_log_output(command, 1);
724    paranoid_free(command);
725
726    set_tape_block_size_with_mt(ntapedev, 512);
727
728    asprintf(&command, "dd if=/dev/zero of=%s bs=512 count=20",ntapedev);
729    res = run_program_and_log_output(command, 1);
730    paranoid_free(command);
731
732    /* OBDR: then ISO boot image bs = 2048 */
733    set_tape_block_size_with_mt(ntapedev, 2048);
734
735    asprintf(&command, "dd if=%s of=%s bs=2048",MINDI_CACHE"/mondorescue.iso",ntapedev);
736    res = run_program_and_log_output(command, 1);
737    paranoid_free(command);
738
739    set_tape_block_size_with_mt(ntapedev, internal_tape_block_size);
740
741    paranoid_free(ntapedev);
742}
743
744
745/**
746 * Open the tape device for input.
747 * @param bkpinfo The backup information structure. Fields used:
748 * - @c bkpinfo->media_device
749 * - @c bkpinfo->tmpdir
750 * @return 0 for success, nonzero for failure.
751 * @note This will also work with a cdstream for now, but don't count on this behavior.
752 */
753int openin_tape()
754{
755    /*@ buffer ***************************************************** */
756    char fname[MAX_STR_LEN];
757    char *datablock;
758    char tmp[MAX_STR_LEN];
759    char old_cwd[MAX_STR_LEN];
760    char outfname[MAX_STR_LEN];
761    /*@ int ******************************************************* */
762    int i;
763    int j;
764    int res;
765    long length, templong;
766    size_t k;
767    int retval = 0;
768    int ctrl_chr;
769
770    /*@ long long ************************************************* */
771    long long size;
772
773    /*@ pointers ************************************************** */
774    FILE *fout;
775
776    /*@ end vars *************************************************** */
777
778    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
779    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
780        fatal_error("Cannot alloc mem for tape catalog");
781    }
782    g_tapecatalog->entries = 0;
783    g_tape_posK = 0;
784    if (g_tape_stream) {
785        log_it("FYI - I won't 'openin' the tape. It's already open.");
786        return (0);
787    }
788    if (bkpinfo->use_obdr) {
789        skip_obdr(bkpinfo->media_device);
790    } else {
791        set_tape_block_size_with_mt(bkpinfo->media_device,
792                                bkpinfo->internal_tape_block_size);
793    }
794
795
796    insist_on_this_tape_number(1);
797    sprintf(outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
798    make_hole_for_file(outfname);
799
800//  start_buffer_process( bkpinfo->media_device, g_tape_fifo, FALSE);
801    log_it("Opening IN tape");
802    if (!
803        (g_tape_stream =
804         open_device_via_buffer(bkpinfo->media_device, 'r',
805                                bkpinfo->internal_tape_block_size))) {
806        log_OS_error(g_tape_fifo);
807        log_to_screen("Cannot openin stream device");
808        return (1);
809    }
810    log_to_screen("Reading stream");
811    log_it("stream device = '%s'", bkpinfo->media_device);
812/* skip data disks */
813    open_evalcall_form("Skipping data disks on stream");
814    log_to_screen("Skipping data disks on stream");
815    if (!(fout = fopen(outfname, "w"))) {
816        log_OS_error(outfname);
817        log_to_screen("Cannot openout datadisk all.tar.gz file");
818        return (-1);
819    }
820    if (!(datablock = (char *) malloc(256 * 1024))) {
821        log_to_screen("Unable to malloc 256*1024");
822        exit(1);
823    }
824    for (i = 0; i < 32; i++) {
825        for (j = 0; j < 4; j++) {
826            for (length = 0, k = 0; length < 256 * 1024; length += k) {
827                k = fread(datablock + length, 1, 256 * 1024 - length,
828                          g_tape_stream);
829            }
830            (void) fwrite(datablock, 1, (size_t) length, fout);
831            g_tape_posK += length / 1024;
832        }
833        if (i > 8)              // otherwise, 'buffer' distorts calculations
834        {
835            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
836            update_evalcall_form((int) (templong));
837        }
838    }
839    paranoid_fclose(fout);
840    paranoid_free(datablock);
841/* find initial blocks */
842    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
843    retval += res;
844    if (ctrl_chr != BLK_START_OF_TAPE) {
845        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
846    }
847    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
848    retval += res;
849    if (ctrl_chr != BLK_START_OF_BACKUP) {
850        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
851    }
852    close_evalcall_form();
853    log_it("Saved all.tar.gz to '%s'", outfname);
854    (void) getcwd(old_cwd, MAX_STR_LEN);
855    chdir(bkpinfo->tmpdir);
856    sprintf(tmp, "tar -zxf %s ./tmp/mondo-restore.cfg 2> /dev/null",
857            outfname);
858    paranoid_system(tmp);
859    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
860    chdir(old_cwd);
861    unlink(outfname);
862    return (retval);
863}
864
865
866/**
867 * Start writing to a CD stream.
868 * @param cddev The CD device to openout via cdrecord.
869 * @param speed The speed to write at.
870 * @return 0 for success, nonzero for failure.
871 * @note This should be called only from backup processes.
872 */
873int openout_cdstream(char *cddev, int speed)
874{
875    /*@ buffers ***************************************************** */
876    char command[MAX_STR_LEN * 2];
877
878    /*@ end vars *************************************************** */
879
880/*  add 'dummy' if testing */
881    sprintf(command,
882            "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
883            cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
884/*  initialise the catalog */
885    g_current_media_number = 1;
886    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
887        fatal_error("Cannot alloc mem for tape catalog");
888    }
889    g_tapecatalog->entries = 0;
890/* log stuff */
891    log_it("Opening OUT cdstream with the command");
892    log_it(command);
893/*  log_it("Let's see what happens, shall we?"); */
894    g_tape_stream = popen(command, "w");
895    if (g_tape_stream) {
896        return (0);
897    } else {
898        log_to_screen("Failed to openout to cdstream (fifo)");
899        return (1);
900    }
901}
902
903/**
904 * Start writing to a tape device for the backup.
905 * Handle OBDR if we were asked to do so
906 * @param tapedev The tape device to open for writing.
907 * @return 0 for success, nonzero for failure.
908 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
909 * EXISTING DATA on the tape!
910 */
911int openout_tape(char *tapedev, long internal_tape_block_size)
912{
913
914    g_current_media_number = 1;
915    if (g_tape_stream) {
916        log_it("FYI - I won't 'openout' the tape. It's already open.");
917        return (0);
918    }
919    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
920        fatal_error("Cannot alloc mem for tape catalog");
921    }
922    g_tapecatalog->entries = 0;
923    g_tape_posK = 0;
924
925    if (bkpinfo->use_obdr) {
926        create_obdr(tapedev);
927    } else {
928        set_tape_block_size_with_mt(tapedev, internal_tape_block_size);
929    }
930    log_it("Opening OUT tape");
931    if (!
932        (g_tape_stream =
933         open_device_via_buffer(tapedev, 'w', internal_tape_block_size))) {
934        log_OS_error(g_tape_fifo);
935        log_to_screen("Cannot openin stream device");
936        return (1);
937    }
938    return (0);
939}
940
941
942
943
944/**
945 * Copy a file from the opened stream (CD or tape) to @p outfile.
946 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
947 * @param outfile The file to write to.
948 * @param size The size of the file in the input stream.
949 * @return 0 for success, nonzero for failure.
950 */
951int
952read_file_from_stream_to_file(char *outfile, long long size)
953{
954
955    /*@ int ******************************************************** */
956    int res;
957
958    /*@ end vars *************************************************** */
959
960    res = read_file_from_stream_FULL(outfile, NULL, size);
961
962    return (res);
963}
964
965
966
967/**
968 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
969 * by @p fout.
970 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
971 * @param fout The stream to write the file to.
972 * @param size The size of the file in bytes.
973 * @return 0 for success, nonzero for failure.
974 */
975int
976read_file_from_stream_to_stream(FILE * fout, long long size)
977{
978
979    /*@ int ******************************************************** */
980    int res;
981
982    /*@ end vars *************************************************** */
983
984    res = read_file_from_stream_FULL(NULL, fout, size);
985/*  fflush(g_tape_stream);
986  fflush(fout);*/
987    return (res);
988}
989
990
991
992/**
993 * Copy a file from the currently opened stream (CD or tape) to either a
994 * @c FILE pointer indicating a currently-opened file, or a filename indicating
995 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
996 * and read_file_from_stream_to_stream() are wrappers for.
997 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
998 * @param outfname If non-NULL, write to this file.
999 * @param foutstream If non-NULL, write to this stream.
1000 * @param orig_size The original length of the file in bytes.
1001 * @return 0 for success, nonzero for failure.
1002 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
1003 */
1004int
1005read_file_from_stream_FULL(char *outfname, FILE * foutstream, long long orig_size)
1006{
1007    /*@ buffers ***************************************************** */
1008    char *tmp;
1009    char *datablock;
1010    char *temp_fname;
1011    char *temp_cksum;
1012    char *actual_cksum;
1013//  char *pA, *pB;
1014
1015    /*@ int ********************************************************* */
1016    int retval = 0;
1017#ifdef EXTRA_TAPE_CHECKSUMS
1018    int i, ch;
1019#endif
1020    int noof_blocks;
1021    int ctrl_chr;
1022    int res;
1023    /*@ pointers **************************************************** */
1024    FILE *fout;
1025
1026    /*@ long    ***************************************************** */
1027    long bytes_to_write = 0L /*,i */ ;
1028//  long bytes_successfully_read_in_this_time = 0;
1029
1030    /*@ long long *************************************************** */
1031    long long temp_size, size;
1032    long bytes_read, bytes_to_read;
1033    long long total_read_from_tape_for_this_file = 0;
1034    long long where_I_was_before_tape_change = 0;
1035    /*@ unsigned int ************************************************ */
1036    /*  unsigned int ch; */
1037    unsigned int crc16;
1038    unsigned int crctt;
1039
1040    bool had_to_resync = FALSE;
1041
1042    /*@ init  ******************************************************* */
1043    malloc_string(tmp);
1044    malloc_string(temp_fname);
1045    malloc_string(temp_cksum);
1046    malloc_string(actual_cksum);
1047    datablock = malloc(TAPE_BLOCK_SIZE);
1048    crc16 = 0;
1049    crctt = 0;
1050    size = orig_size;
1051
1052    /*@ end vars *************************************************** */
1053
1054    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1055    if (orig_size != temp_size && orig_size != -1) {
1056        sprintf(tmp,
1057                "output file's size should be %ld K but is apparently %ld K",
1058                (long) size >> 10, (long) temp_size >> 10);
1059        log_to_screen(tmp);
1060    }
1061    if (ctrl_chr != BLK_START_FILE) {
1062        wrong_marker(BLK_START_FILE, ctrl_chr);
1063        return (1);
1064    }
1065    /* Not used
1066    sprintf(tmp, "Reading file from tape; writing to '%s'; %ld KB",
1067            outfname, (long) size >> 10);
1068            */
1069
1070    if (foutstream) {
1071        fout = foutstream;
1072    } else {
1073        fout = fopen(outfname, "w");
1074    }
1075    if (!fout) {
1076        log_OS_error(outfname);
1077        log_to_screen("Cannot openout file");
1078        return (1);
1079    }
1080    total_read_from_tape_for_this_file = 0;
1081    for (noof_blocks = 0; size > 0;
1082         noof_blocks++, size -=
1083         bytes_to_write, total_read_from_tape_for_this_file +=
1084         bytes_read) {
1085        bytes_to_write =
1086            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1087        bytes_to_read = TAPE_BLOCK_SIZE;
1088        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1089        while (bytes_read < bytes_to_read) {    // next tape!
1090//    crctt=crc16=0;
1091            where_I_was_before_tape_change = size;
1092            log_msg(4, "where_I_was_... = %lld",
1093                    where_I_was_before_tape_change);
1094            start_to_read_from_next_tape();
1095            log_msg(4, "Started reading from next tape.");
1096            skip_incoming_files_until_we_find_this_one(temp_fname);
1097            log_msg(4, "Skipped irrelevant files OK.");
1098            for (size = orig_size; size > where_I_was_before_tape_change;
1099                 size -= bytes_to_write) {
1100                bytes_read =
1101                    fread(datablock, 1, bytes_to_read, g_tape_stream);
1102            }
1103            log_msg(4, "'size' is now %lld (should be %lld)", size,
1104                    where_I_was_before_tape_change);
1105            log_to_screen("Successfully re-sync'd tape");
1106            had_to_resync = TRUE;
1107            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1108        }
1109
1110        (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
1111
1112#ifdef EXTRA_TAPE_CHECKSUMS
1113        for (i = 0; i < (int) bytes_to_write; i++) {
1114            ch = datablock[i];
1115            crc16 = updcrcr(crc16, (unsigned) ch);
1116            crctt = updcrc(crctt, (unsigned) ch);
1117        }
1118#endif
1119    }
1120    log_msg(6, "Total read from tape for this file = %lld",
1121            total_read_from_tape_for_this_file);
1122    log_msg(6, ".......................... Should be %lld", orig_size);
1123    g_tape_posK += total_read_from_tape_for_this_file / 1024;
1124    sprintf(actual_cksum, "%04x%04x", crc16, crctt);
1125    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
1126    } else {
1127        paranoid_fclose(fout);
1128    }
1129    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
1130    if (ctrl_chr != BLK_STOP_FILE) {
1131        wrong_marker(BLK_STOP_FILE, ctrl_chr);
1132//      fatal_error("Bad marker"); // return(1);
1133    }
1134    if (strcmp(temp_cksum, actual_cksum)) {
1135        sprintf(tmp, "actual cksum=%s; recorded cksum=%s", actual_cksum,
1136                temp_cksum);
1137        log_to_screen(tmp);
1138        sprintf(tmp, "%s (%ld K) is corrupt on tape", temp_fname,
1139                (long) orig_size >> 10);
1140        log_to_screen(tmp);
1141        retval++;
1142    } else {
1143        sprintf(tmp, "%s is GOOD on tape", temp_fname);
1144        /*      log_it(tmp); */
1145    }
1146    paranoid_free(datablock);
1147    paranoid_free(tmp);
1148    paranoid_free(temp_fname);
1149    paranoid_free(temp_cksum);
1150    paranoid_free(actual_cksum);
1151    return (retval);
1152}
1153
1154
1155
1156/**
1157 * Read a header block from the currently opened stream (CD or tape).
1158 * This block indicates the length of the following file (if it's file-related)
1159 * the filename (if it's file-related), and the block type.
1160 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
1161 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
1162 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
1163 * @return 0 for success, nonzero for failure.
1164 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
1165 */
1166int
1167read_header_block_from_stream(long long *plen, char *filename,
1168                              int *pcontrol_char)
1169{
1170
1171    /*@ buffers ***************************************************** */
1172    char *tempblock;
1173
1174    /*@ int ********************************************************* */
1175    int i, retval;
1176
1177    /*@ end vars *************************************************** */
1178
1179    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
1180
1181    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1182        tempblock[i] = 0;
1183    }
1184    while (!(*pcontrol_char = tempblock[7000])) {
1185        g_tape_posK +=
1186            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1187                  g_tape_stream) / 1024;
1188    }
1189/*  memcpy((char*)plength_of_incoming_file,(char*)tempblock+7001,sizeof(long long)); */
1190/*  for(*plen=0,i=7;i>=0;i--) {*plen<<=8; *plen |= tempblock[7001+i];} */
1191    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1192    if (strcmp(tempblock + 6000 + *pcontrol_char, STR_HEADER)) {
1193        log_it("Bad header block at %ld K", (long) g_tape_posK);
1194    }
1195    strcpy(filename, tempblock + 1000);
1196/*  strcpy(cksum,tempblock+5555);*/
1197/*  log_it( "%s  (reading) fname=%s, filesize=%ld K",
1198       marker_to_string (*pcontrol_char), filename,
1199       (long) ((*plen) >> 10));
1200*/
1201    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1202        log_to_screen("I can't verify an aborted backup.");
1203        retval = 1;
1204    } else {
1205        retval = 0;
1206    }
1207    for (i = 1000; i < 1020; i++) {
1208        if (tempblock[i] < 32 || tempblock[i] > 126) {
1209            tempblock[i] = ' ';
1210        }
1211    }
1212    tempblock[i] = '\0';
1213    log_msg(6, "%s (fname=%s, size=%ld K)",
1214            marker_to_string(*pcontrol_char), tempblock + 1000,
1215            (long) (*plen) >> 10);
1216    paranoid_free(tempblock);
1217    return (retval);
1218}
1219
1220
1221
1222/**
1223 * Add specified file/slice to the internal catalog of all archives written.
1224 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1225 * write the last [buffer size] MB from the catalog to the new tape, so we know
1226 * we have @e all archives on some CD/tape/whatever.
1227 * @param type The type of file we're cataloging (afioball, slice, something else)
1228 * @param number The fileset number or biggiefile number.
1229 * @param aux The slice number if it's a biggiefile, or any other additional info.
1230 * @param fn The original full pathname of the file we're recording.
1231 * @return The index of the record we just added.
1232 */
1233int register_in_tape_catalog(t_archtype type, int number, long aux,
1234                             char *fn)
1235{
1236    int last;
1237    char fname[MAX_TAPECAT_FNAME_LEN];
1238    char *p;
1239
1240    p = strrchr(fn, '/');
1241    if (p) {
1242        p++;
1243    } else {
1244        p = fn;
1245    }
1246    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1247    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1248    last = g_tapecatalog->entries;
1249    if (last >= MAX_TAPECATALOG_ENTRIES) {
1250        log_it
1251            ("Warning - can't log #%d in tape catalog - too many entries already",
1252             number);
1253        return (-1);
1254    }
1255    g_tapecatalog->el[last].type = type;
1256    g_tapecatalog->el[last].number = number;
1257    g_tapecatalog->el[last].aux = aux;
1258    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1259    strcpy(g_tapecatalog->el[last].fname, fname);
1260    g_tapecatalog->entries++;
1261    return (last);              // returns the index of the record we've jsut added
1262}
1263
1264
1265
1266
1267/**
1268 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1269 * (got SIGPIPE) or look like we will.
1270 * @param mediasize The size of the tape in megabytes.
1271 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1272 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1273 * autodetecting the size. Huh?
1274 */
1275
1276/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1277bool
1278should_we_write_to_next_tape(long mediasize,
1279                             off_t length_of_incoming_file)
1280{
1281    /*@ bool's ***************************************************** */
1282    bool we_need_a_new_tape = FALSE;
1283
1284    /*@ end vars *************************************************** */
1285
1286    if (mediasize == 0) {
1287        return (FALSE);
1288    }
1289    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1290        log_it("mediasize = %ld", mediasize);
1291        we_need_a_new_tape = TRUE;
1292        log_to_screen("Should have started a new tape/CD already");
1293    }
1294    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1295        mediasize - (SLICE_SIZE * 4 / 1024)) {
1296        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1297               mediasize);
1298        we_need_a_new_tape = TRUE;
1299    }
1300    return (we_need_a_new_tape);
1301}
1302
1303
1304/**
1305 * Seek through the stream until we find a header block where the NAME field matches
1306 * @p the_file_I_was_reading. This is useful if you've just started reading from
1307 * a new tape and want to find the file you were reading when the tape ended.
1308 * @param the_file_I_was_reading File name to look for.
1309 * @return 0 for success, nonzero for failure.
1310 */
1311int skip_incoming_files_until_we_find_this_one(char
1312                                               *the_file_I_was_reading)
1313{
1314    char *pA;
1315    char *pB;
1316    int res;
1317    int ctrl_chr;
1318    char *temp_fname;
1319    char *datablock;
1320    long long temp_size, size;
1321    long bytes_to_write;
1322
1323    datablock = malloc(TAPE_BLOCK_SIZE);
1324    malloc_string(temp_fname);
1325    pB = strrchr(the_file_I_was_reading, '/');
1326    if (pB) {
1327        pB++;
1328    } else {
1329        pB = the_file_I_was_reading;
1330    }
1331    log_msg(1, "skip_incoming_..(%s)", pB);
1332    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1333    ctrl_chr = -1;
1334    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1335        res =
1336            read_header_block_from_stream(&temp_size, temp_fname,
1337                                          &ctrl_chr);
1338        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1339            break;
1340        }
1341        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1342        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1343        log_msg(3, "Still trying to re-sync w/ tape");
1344    }
1345    while (ctrl_chr != BLK_START_FILE) {
1346        res =
1347            read_header_block_from_stream(&temp_size, temp_fname,
1348                                          &ctrl_chr);
1349        if (ctrl_chr == BLK_START_FILE) {
1350            break;
1351        }
1352        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1353        wrong_marker(BLK_START_FILE, ctrl_chr);
1354        log_msg(3, "Still trying to re-sync w/ tape");
1355    }
1356    pA = strrchr(temp_fname, '/');
1357    if (pA) {
1358        pA++;
1359    } else {
1360        pA = temp_fname;
1361    }
1362    pB = strrchr(the_file_I_was_reading, '/');
1363    if (pB) {
1364        pB++;
1365    } else {
1366        pB = the_file_I_was_reading;
1367    }
1368    while (strcmp(pA, pB)) {
1369        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1370                the_file_I_was_reading);
1371        for (size = temp_size; size > 0; size -= bytes_to_write) {
1372            bytes_to_write =
1373                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1374            // FIXME - needs error-checking and -catching
1375            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1376        }
1377        res =
1378            read_header_block_from_stream(&temp_size, temp_fname,
1379                                          &ctrl_chr);
1380        if (ctrl_chr != BLK_STOP_FILE) {
1381            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1382        }
1383        res =
1384            read_header_block_from_stream(&temp_size, temp_fname,
1385                                          &ctrl_chr);
1386        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1387            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1388        }
1389        res =
1390            read_header_block_from_stream(&temp_size, temp_fname,
1391                                          &ctrl_chr);
1392        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1393            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1394        }
1395        res =
1396            read_header_block_from_stream(&temp_size, temp_fname,
1397                                          &ctrl_chr);
1398        if (ctrl_chr != BLK_START_FILE) {
1399            wrong_marker(BLK_START_FILE, ctrl_chr);
1400        }
1401        pA = strrchr(temp_fname, '/');
1402        if (pA) {
1403            pA++;
1404        } else {
1405            pA = temp_fname;
1406        }
1407        pB = strrchr(the_file_I_was_reading, '/');
1408        if (pB) {
1409            pB++;
1410        } else {
1411            pB = the_file_I_was_reading;
1412        }
1413    }
1414    log_msg(2, "Reading %s (it matches %s)", temp_fname,
1415            the_file_I_was_reading);
1416    paranoid_free(temp_fname);
1417    paranoid_free(datablock);
1418    return (0);
1419}
1420
1421
1422/**
1423 * Start to read from the next tape. Assumes the user has already inserted it.
1424 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1425 * @return 0 for success, nonzero for failure.
1426 */
1427int start_to_read_from_next_tape()
1428{
1429    /*@ int ********************************************************* */
1430    int res = 0;
1431    char *sz_msg;
1432    int ctrlchr;
1433    long long temp_size;
1434    malloc_string(sz_msg);
1435    /*@ end vars *************************************************** */
1436
1437    paranoid_pclose(g_tape_stream);
1438    sync();
1439    sync();
1440    sync();
1441    log_it("Next tape requested.");
1442    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1443    log_it("Opening IN the next tape");
1444    if (!
1445        (g_tape_stream =
1446         open_device_via_buffer(bkpinfo->media_device, 'r',
1447                                bkpinfo->internal_tape_block_size))) {
1448        log_OS_error(g_tape_fifo);
1449        log_to_screen("Cannot openin stream device");
1450        return (1);
1451    }
1452    g_tape_posK = 0;
1453    g_sigpipe = FALSE;
1454    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1455    if (ctrlchr != BLK_START_OF_TAPE) {
1456        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1457    }
1458    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1459    if (ctrlchr != BLK_START_OF_BACKUP) {
1460        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1461    } else {
1462        log_msg(3, "Next tape opened OK. Whoopee!");
1463    }
1464    paranoid_free(sz_msg);
1465    return (res);
1466}
1467
1468
1469
1470/**
1471 * Start to write to the next tape. Assume the user has already inserted it.
1472 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1473 * @return 0 for success, nonzero for failure.
1474 */
1475int start_to_write_to_next_tape()
1476{
1477    int res = 0;
1478    char command[MAX_STR_LEN * 2];
1479    paranoid_pclose(g_tape_stream);
1480    system("sync");
1481    system("sync");
1482    system("sync");
1483    log_it("New tape requested.");
1484    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1485    if (g_current_media_number > MAX_NOOF_MEDIA) {
1486        res++;
1487        log_to_screen("Too many tapes. Man, you need to use nfs!");
1488    }
1489    if (bkpinfo->backup_media_type == cdstream) {
1490        sprintf(command,
1491                "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1492                bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE,
1493                MONDO_LOGFILE);
1494        log_it("Opening OUT to next CD with the command");
1495        log_it(command);
1496        log_it("Let's see what happens, shall we?");
1497        g_tape_stream = popen(command, "w");
1498        if (!g_tape_stream) {
1499            log_to_screen("Failed to openout to cdstream (fifo)");
1500            return (1);
1501        }
1502    } else {
1503        log_it("Opening OUT to next tape");
1504        if (!
1505            (g_tape_stream =
1506             open_device_via_buffer(bkpinfo->media_device, 'w',
1507                                    bkpinfo->internal_tape_block_size))) {
1508            log_OS_error(g_tape_fifo);
1509            log_to_screen("Cannot openin stream device");
1510            return (1);
1511        }
1512    }
1513    g_tape_posK = 0;
1514    g_sigpipe = FALSE;
1515    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1516    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1517    return (res);
1518}
1519
1520
1521
1522
1523/**
1524 * Write a bufferfull of the most recent archives to the tape. The
1525 * rationale behind this is a bit complex. If the previous tape ended
1526 * suddenly (EOF or otherwise) some archives were probably left in the
1527 * buffer. That means that Mondo thinks they have been written, but
1528 * the external binary @c buffer has not actually written them. So to
1529 * be safe, we start the new tape by writing the last bufferfull from
1530 * the old one. This insures that all archives will be on at least
1531 * one tape. Sounds inelegant, but it works.
1532 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1533 * @return 0 for success, nonzero for failure.
1534 */
1535int write_backcatalog_to_tape()
1536{
1537    int i, last, res = 0;
1538    char *fname;
1539
1540    log_msg(2, "I am now writing back catalog to tape");
1541    malloc_string(fname);
1542    last = g_tapecatalog->entries - 1;
1543    for (i = 0; i <= last; i++) {
1544        sprintf(fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir,
1545                g_tapecatalog->el[i].fname);
1546        if (!does_file_exist(fname)) {
1547            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1548        } else {
1549            write_header_block_to_stream(length_of_file(fname),
1550                                         "start-backcatalog-afio-or-slice",
1551                                         BLK_START_AN_AFIO_OR_SLICE);
1552            log_msg(2, "Writing %s", fname);
1553            if (write_file_to_stream_from_file(fname)) {
1554                res++;
1555                log_msg(2, "%s failed", fname);
1556            }
1557            if (i != last) {
1558                write_header_block_to_stream((off_t)0,
1559                                             "stop-backcatalog-afio-or-slice",
1560                                             BLK_STOP_AN_AFIO_OR_SLICE);
1561            }
1562        }
1563    }
1564    paranoid_free(fname);
1565    log_msg(2, "Finished writing back catalog to tape");
1566    return (res);
1567}
1568
1569
1570
1571/**
1572 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1573 * @param fname The path to all.tar.gz.
1574 * @return 0 for success, nonzero for failure.
1575 */
1576int write_data_disks_to_stream(char *fname)
1577{
1578    /*@ pointers *************************************************** */
1579    FILE *fin;
1580    char tmp[MAX_STR_LEN];
1581
1582    /*@ long ******************************************************* */
1583    long m = -1;
1584    long templong;
1585
1586    /*@ int ******************************************************** */
1587    int i, j;
1588
1589    /*@ buffers **************************************************** */
1590    char tempblock[256 * 1024];
1591
1592    /*@ end vars *************************************************** */
1593
1594    open_evalcall_form("Writing data disks to tape");
1595    log_to_screen("Writing data disks to tape");
1596    log_it("Data disks = %s", fname);
1597    if (!does_file_exist(fname)) {
1598        sprintf(tmp, "Cannot find %s", fname);
1599        log_to_screen(tmp);
1600        return (1);
1601    }
1602    if (!(fin = fopen(fname, "r"))) {
1603        log_OS_error(fname);
1604        fatal_error("Cannot openin the data disk");
1605    }
1606    for (i = 0; i < 32; i++) {  /* 32MB */
1607        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1608            if (!feof(fin)) {
1609                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1610            } else {
1611                m = 0;
1612            }
1613            for (; m < 256 * 1024; m++) {
1614                tempblock[m] = '\0';
1615            }
1616            g_tape_posK +=
1617                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1618        }
1619        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1620        {
1621            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1622            update_evalcall_form((int) (templong));
1623        }
1624    }
1625    paranoid_fclose(fin);
1626    close_evalcall_form();
1627    return (0);
1628}
1629
1630
1631
1632
1633/**
1634 * Copy @p infile to the opened stream (CD or tape).
1635 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1636 * @param infile The file to write to the stream.
1637 * @return 0 for success, nonzero for failure.
1638 */
1639int write_file_to_stream_from_file(char *infile)
1640{
1641    /*@ buffers **************************************************** */
1642    char tmp[MAX_STR_LEN];
1643    char datablock[TAPE_BLOCK_SIZE];
1644    char checksum[MAX_STR_LEN];
1645    char *infile_basename;
1646
1647    /*@ int ******************************************************** */
1648    int retval = 0;
1649    int noof_blocks;
1650
1651    /*  unsigned int ch; */
1652    unsigned int crc16;
1653    unsigned int crctt;
1654
1655    /*@ pointers *************************************************** */
1656    FILE *fin;
1657    char *p;
1658
1659    /*@ long ******************************************************* */
1660    long bytes_to_read = 0;
1661    long i;
1662
1663    off_t filesize;
1664
1665#ifdef EXTRA_TAPE_CHECKSUMS
1666    int ch;
1667#endif
1668
1669    /*@ initialize ************************************************ */
1670    crc16 = 0;
1671    crctt = 0;
1672
1673
1674
1675    /*@ end vars *************************************************** */
1676
1677    infile_basename = strrchr(infile, '/');
1678    if (infile_basename) {
1679        infile_basename++;
1680    } else {
1681        infile_basename = infile;
1682    }
1683    filesize = length_of_file(infile);
1684    if (should_we_write_to_next_tape
1685        (bkpinfo->media_size[g_current_media_number], filesize)) {
1686        start_to_write_to_next_tape();
1687        write_backcatalog_to_tape();
1688    }
1689    p = strrchr(infile, '/');
1690    if (!p) {
1691        p = infile;
1692    } else {
1693        p++;
1694    }
1695    sprintf(tmp, "Writing file '%s' to tape (%ld KB)", p,
1696            (long) filesize >> 10);
1697    log_it(tmp);
1698    write_header_block_to_stream(filesize, infile_basename,
1699                                 BLK_START_FILE);
1700//go_here_to_restart_saving_of_file:
1701    if (!(fin = fopen(infile, "r"))) {
1702        log_OS_error(infile);
1703        return (1);
1704    }
1705    for (noof_blocks = 0; filesize > 0;
1706         noof_blocks++, filesize -= bytes_to_read) {
1707        if (filesize < TAPE_BLOCK_SIZE) {
1708            bytes_to_read = (long) filesize;
1709            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1710                datablock[i] = '\0';
1711            }
1712        } else {
1713            bytes_to_read = TAPE_BLOCK_SIZE;
1714        }
1715        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1716        g_tape_posK +=
1717            fwrite(datablock, 1, /*bytes_to_read */ 
1718                   (size_t) TAPE_BLOCK_SIZE,
1719                   g_tape_stream) / 1024;
1720        if (g_sigpipe) {
1721            iamhere("Sigpipe occurred recently. I'll start a new tape.");
1722            fclose(fin);
1723            g_sigpipe = FALSE;
1724            start_to_write_to_next_tape();
1725            write_backcatalog_to_tape();    // kinda-sorta recursive :)
1726            return (0);
1727        }
1728#ifdef EXTRA_TAPE_CHECKSUMS
1729        for (i = 0; i < bytes_to_read; i++) {
1730            ch = datablock[i];
1731            crc16 = updcrcr(crc16, (unsigned) ch);
1732            crctt = updcrc(crctt, (unsigned) ch);
1733        }
1734#endif
1735    }
1736    paranoid_fclose(fin);
1737    sprintf(checksum, "%04x%04x", crc16, crctt);
1738    /* BERLIOS: what does it do ??? */
1739    write_header_block_to_stream((off_t)g_current_media_number, checksum,
1740                                 BLK_STOP_FILE);
1741//  log_it("File '%s' written to tape.", infile);
1742    return (retval);
1743}
1744
1745
1746
1747
1748
1749/**
1750 * Write a header block to the opened stream (CD or tape).
1751 * @param length_of_incoming_file The length to store in the header block.
1752 * Usually matters only if this is a file-related header, in which case it should
1753 * be the length of the file that will follow.
1754 * @param filename The filename to store in the header block. Usually matters
1755 * only if this is a file-related header, in which case this should be the name
1756 * if the file that will follow.
1757 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1758 * @return 0 for success, nonzero for failure.
1759 */
1760int
1761write_header_block_to_stream(off_t length_of_incoming_file,
1762                             char *filename, int control_char)
1763{
1764    /*@ buffers **************************************************** */
1765    char tempblock[TAPE_BLOCK_SIZE];
1766    char tmp[MAX_STR_LEN];
1767    char *p;
1768
1769    /*@ int ******************************************************** */
1770    int i;
1771
1772    off_t olen;
1773
1774    /*@ end vars *************************************************** */
1775
1776
1777    olen = length_of_incoming_file;
1778    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1779    if (!p) {
1780        p = filename;
1781    } else {
1782        p++;
1783    }
1784    if (!g_tape_stream) {
1785        log_to_screen
1786            ("You're not backing up to tape. Why write a tape header?");
1787        return (1);
1788    }
1789    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1790        tempblock[i] = 0;
1791    }
1792    sprintf(tempblock + 6000 + control_char, STR_HEADER);
1793    tempblock[7000] = control_char;
1794/*  for(i=0;i<8;i++) {tempblock[7001+i]=olen&0xff; olen>>=8;} */
1795    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1796/*  if (length_of_incoming_file) {memcpy(tempblock+7001,(char*)&length_of_incoming_file,sizeof(long long));} */
1797    strcpy(tempblock + 1000, filename);
1798/*  strcpy(tempblock+5555,cksum); */
1799    g_tape_posK +=
1800        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1801               g_tape_stream) / 1024;
1802    sprintf(tmp, "%s (fname=%s, size=%ld K)",
1803            marker_to_string(control_char), p,
1804            (long) length_of_incoming_file >> 10);
1805    log_msg(6, tmp);
1806/*  log_tape_pos(); */
1807    return (0);
1808}
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819/**
1820 * Log (to screen) an erroneous marker, along with what it should have been.
1821 * @param should_be What we were expecting.
1822 * @param it_is What we got.
1823 */
1824void wrong_marker(int should_be, int it_is)
1825{
1826    /*@ buffer ***************************************************** */
1827    char tmp[MAX_STR_LEN];
1828
1829
1830    /*@ end vars *************************************************** */
1831    sprintf(tmp, "Wrong marker! (Should be %s, ",
1832            marker_to_string(should_be));
1833    sprintf(tmp + strlen(tmp), "is actually %s)", marker_to_string(it_is));
1834    log_to_screen(tmp);
1835}
1836
1837/* @} - end of streamGroup */
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