source: branches/2.2.6/mondo/src/common/libmondo-stream.c @ 1951

Last change on this file since 1951 was 1951, checked in by bruno, 11 years ago
  • Correct function to hqndle non-rewinding dev
  • Property svn:keywords set to Id
File size: 51.4 KB
Line 
1/* libmondo-stream.c
2   $Id: libmondo-stream.c 1951 2008-05-26 16:40:27Z bruno $
3
4...tools for talking to tapes, Monitas streams, etc.
5
6*/
7
8
9/**
10 * @file
11 * Functions for writing data to/reading data from streams (tape, CD stream, etc.)
12 */
13
14#include "my-stuff.h"
15#include "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 1951 2008-05-26 16:40:27Z 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    paranoid_free(ntapedev);
700}
701
702int create_obdr(char *tapedev)
703{
704
705    char *ntapedev = NULL;
706    char *command = NULL;
707    int res = 0;
708
709    ntapedev = get_non_rewind_dev(tapedev);
710    if (ntapedev == NULL) {
711        log_it("Skipping OBDR");
712        return(1);
713    }
714
715    /* OBDR: First block 10 kB of zero bs = 512 */
716    asprintf(&command, "mt -f %s compression off", tapedev);
717    res = run_program_and_log_output(command, 1);
718    paranoid_free(command);
719
720    asprintf(&command, "mt -f %s rewind", tapedev);
721    res = run_program_and_log_output(command, 1);
722    paranoid_free(command);
723
724    asprintf(&command, "mt -f %s setblk 512", ntapedev);
725    res = run_program_and_log_output(command, 1);
726    paranoid_free(command);
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    asprintf(&command, "mt -f %s setblk 2048", ntapedev);
734    res = run_program_and_log_output(command, 1);
735    paranoid_free(command);
736
737    asprintf(&command, "dd if=%s of=%s bs=2048", MINDI_CACHE"/mondorescue.iso", ntapedev );
738    res = run_program_and_log_output(command, 1);
739    paranoid_free(command);
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    }
791
792    insist_on_this_tape_number(1);
793    sprintf(outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
794    make_hole_for_file(outfname);
795
796    set_tape_block_size_with_mt(bkpinfo->media_device,
797                                bkpinfo->internal_tape_block_size);
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(char *tapedev, long internal_tape_block_size)
911{
912
913    g_current_media_number = 1;
914    if (g_tape_stream) {
915        log_it("FYI - I won't 'openout' the tape. It's already open.");
916        return (0);
917    }
918    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
919        fatal_error("Cannot alloc mem for tape catalog");
920    }
921    g_tapecatalog->entries = 0;
922    g_tape_posK = 0;
923
924    if (bkpinfo->use_obdr) {
925        create_obdr(tapedev);
926    }
927
928    set_tape_block_size_with_mt(tapedev, internal_tape_block_size);
929    log_it("Opening OUT tape");
930    if (!
931        (g_tape_stream =
932         open_device_via_buffer(tapedev, 'w', internal_tape_block_size))) {
933        log_OS_error(g_tape_fifo);
934        log_to_screen("Cannot openin stream device");
935        return (1);
936    }
937    return (0);
938}
939
940
941
942
943/**
944 * Copy a file from the opened stream (CD or tape) to @p outfile.
945 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
946 * @param outfile The file to write to.
947 * @param size The size of the file in the input stream.
948 * @return 0 for success, nonzero for failure.
949 */
950int
951read_file_from_stream_to_file(char *outfile, long long size)
952{
953
954    /*@ int ******************************************************** */
955    int res;
956
957    /*@ end vars *************************************************** */
958
959    res = read_file_from_stream_FULL(outfile, NULL, size);
960
961    return (res);
962}
963
964
965
966/**
967 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
968 * by @p fout.
969 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
970 * @param fout The stream to write the file to.
971 * @param size The size of the file in bytes.
972 * @return 0 for success, nonzero for failure.
973 */
974int
975read_file_from_stream_to_stream(FILE * fout, long long size)
976{
977
978    /*@ int ******************************************************** */
979    int res;
980
981    /*@ end vars *************************************************** */
982
983    res = read_file_from_stream_FULL(NULL, fout, size);
984/*  fflush(g_tape_stream);
985  fflush(fout);*/
986    return (res);
987}
988
989
990
991/**
992 * Copy a file from the currently opened stream (CD or tape) to either a
993 * @c FILE pointer indicating a currently-opened file, or a filename indicating
994 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
995 * and read_file_from_stream_to_stream() are wrappers for.
996 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
997 * @param outfname If non-NULL, write to this file.
998 * @param foutstream If non-NULL, write to this stream.
999 * @param orig_size The original length of the file in bytes.
1000 * @return 0 for success, nonzero for failure.
1001 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
1002 */
1003int
1004read_file_from_stream_FULL(char *outfname, FILE * foutstream, long long orig_size)
1005{
1006    /*@ buffers ***************************************************** */
1007    char *tmp;
1008    char *datablock;
1009    char *temp_fname;
1010    char *temp_cksum;
1011    char *actual_cksum;
1012//  char *pA, *pB;
1013
1014    /*@ int ********************************************************* */
1015    int retval = 0;
1016#ifdef EXTRA_TAPE_CHECKSUMS
1017    int i, ch;
1018#endif
1019    int noof_blocks;
1020    int ctrl_chr;
1021    int res;
1022    /*@ pointers **************************************************** */
1023    FILE *fout;
1024
1025    /*@ long    ***************************************************** */
1026    long bytes_to_write = 0L /*,i */ ;
1027//  long bytes_successfully_read_in_this_time = 0;
1028
1029    /*@ long long *************************************************** */
1030    long long temp_size, size;
1031    long bytes_read, bytes_to_read;
1032    long long total_read_from_tape_for_this_file = 0;
1033    long long where_I_was_before_tape_change = 0;
1034    /*@ unsigned int ************************************************ */
1035    /*  unsigned int ch; */
1036    unsigned int crc16;
1037    unsigned int crctt;
1038
1039    bool had_to_resync = FALSE;
1040
1041    /*@ init  ******************************************************* */
1042    malloc_string(tmp);
1043    malloc_string(temp_fname);
1044    malloc_string(temp_cksum);
1045    malloc_string(actual_cksum);
1046    datablock = malloc(TAPE_BLOCK_SIZE);
1047    crc16 = 0;
1048    crctt = 0;
1049    size = orig_size;
1050
1051    /*@ end vars *************************************************** */
1052
1053    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1054    if (orig_size != temp_size && orig_size != -1) {
1055        sprintf(tmp,
1056                "output file's size should be %ld K but is apparently %ld K",
1057                (long) size >> 10, (long) temp_size >> 10);
1058        log_to_screen(tmp);
1059    }
1060    if (ctrl_chr != BLK_START_FILE) {
1061        wrong_marker(BLK_START_FILE, ctrl_chr);
1062        return (1);
1063    }
1064    /* Not used
1065    sprintf(tmp, "Reading file from tape; writing to '%s'; %ld KB",
1066            outfname, (long) size >> 10);
1067            */
1068
1069    if (foutstream) {
1070        fout = foutstream;
1071    } else {
1072        fout = fopen(outfname, "w");
1073    }
1074    if (!fout) {
1075        log_OS_error(outfname);
1076        log_to_screen("Cannot openout file");
1077        return (1);
1078    }
1079    total_read_from_tape_for_this_file = 0;
1080    for (noof_blocks = 0; size > 0;
1081         noof_blocks++, size -=
1082         bytes_to_write, total_read_from_tape_for_this_file +=
1083         bytes_read) {
1084        bytes_to_write =
1085            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1086        bytes_to_read = TAPE_BLOCK_SIZE;
1087        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1088        while (bytes_read < bytes_to_read) {    // next tape!
1089//    crctt=crc16=0;
1090            where_I_was_before_tape_change = size;
1091            log_msg(4, "where_I_was_... = %lld",
1092                    where_I_was_before_tape_change);
1093            start_to_read_from_next_tape();
1094            log_msg(4, "Started reading from next tape.");
1095            skip_incoming_files_until_we_find_this_one(temp_fname);
1096            log_msg(4, "Skipped irrelevant files OK.");
1097            for (size = orig_size; size > where_I_was_before_tape_change;
1098                 size -= bytes_to_write) {
1099                bytes_read =
1100                    fread(datablock, 1, bytes_to_read, g_tape_stream);
1101            }
1102            log_msg(4, "'size' is now %lld (should be %lld)", size,
1103                    where_I_was_before_tape_change);
1104            log_to_screen("Successfully re-sync'd tape");
1105            had_to_resync = TRUE;
1106            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1107        }
1108
1109        (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
1110
1111#ifdef EXTRA_TAPE_CHECKSUMS
1112        for (i = 0; i < (int) bytes_to_write; i++) {
1113            ch = datablock[i];
1114            crc16 = updcrcr(crc16, (unsigned) ch);
1115            crctt = updcrc(crctt, (unsigned) ch);
1116        }
1117#endif
1118    }
1119    log_msg(6, "Total read from tape for this file = %lld",
1120            total_read_from_tape_for_this_file);
1121    log_msg(6, ".......................... Should be %lld", orig_size);
1122    g_tape_posK += total_read_from_tape_for_this_file / 1024;
1123    sprintf(actual_cksum, "%04x%04x", crc16, crctt);
1124    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
1125    } else {
1126        paranoid_fclose(fout);
1127    }
1128    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
1129    if (ctrl_chr != BLK_STOP_FILE) {
1130        wrong_marker(BLK_STOP_FILE, ctrl_chr);
1131//      fatal_error("Bad marker"); // return(1);
1132    }
1133    if (strcmp(temp_cksum, actual_cksum)) {
1134        sprintf(tmp, "actual cksum=%s; recorded cksum=%s", actual_cksum,
1135                temp_cksum);
1136        log_to_screen(tmp);
1137        sprintf(tmp, "%s (%ld K) is corrupt on tape", temp_fname,
1138                (long) orig_size >> 10);
1139        log_to_screen(tmp);
1140        retval++;
1141    } else {
1142        sprintf(tmp, "%s is GOOD on tape", temp_fname);
1143        /*      log_it(tmp); */
1144    }
1145    paranoid_free(datablock);
1146    paranoid_free(tmp);
1147    paranoid_free(temp_fname);
1148    paranoid_free(temp_cksum);
1149    paranoid_free(actual_cksum);
1150    return (retval);
1151}
1152
1153
1154
1155/**
1156 * Read a header block from the currently opened stream (CD or tape).
1157 * This block indicates the length of the following file (if it's file-related)
1158 * the filename (if it's file-related), and the block type.
1159 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
1160 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
1161 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
1162 * @return 0 for success, nonzero for failure.
1163 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
1164 */
1165int
1166read_header_block_from_stream(long long *plen, char *filename,
1167                              int *pcontrol_char)
1168{
1169
1170    /*@ buffers ***************************************************** */
1171    char *tempblock;
1172
1173    /*@ int ********************************************************* */
1174    int i, retval;
1175
1176    /*@ end vars *************************************************** */
1177
1178    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
1179
1180    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1181        tempblock[i] = 0;
1182    }
1183    while (!(*pcontrol_char = tempblock[7000])) {
1184        g_tape_posK +=
1185            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1186                  g_tape_stream) / 1024;
1187    }
1188/*  memcpy((char*)plength_of_incoming_file,(char*)tempblock+7001,sizeof(long long)); */
1189/*  for(*plen=0,i=7;i>=0;i--) {*plen<<=8; *plen |= tempblock[7001+i];} */
1190    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1191    if (strcmp(tempblock + 6000 + *pcontrol_char, STR_HEADER)) {
1192        log_it("Bad header block at %ld K", (long) g_tape_posK);
1193    }
1194    strcpy(filename, tempblock + 1000);
1195/*  strcpy(cksum,tempblock+5555);*/
1196/*  log_it( "%s  (reading) fname=%s, filesize=%ld K",
1197       marker_to_string (*pcontrol_char), filename,
1198       (long) ((*plen) >> 10));
1199*/
1200    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1201        log_to_screen("I can't verify an aborted backup.");
1202        retval = 1;
1203    } else {
1204        retval = 0;
1205    }
1206    for (i = 1000; i < 1020; i++) {
1207        if (tempblock[i] < 32 || tempblock[i] > 126) {
1208            tempblock[i] = ' ';
1209        }
1210    }
1211    tempblock[i] = '\0';
1212    log_msg(6, "%s (fname=%s, size=%ld K)",
1213            marker_to_string(*pcontrol_char), tempblock + 1000,
1214            (long) (*plen) >> 10);
1215    paranoid_free(tempblock);
1216    return (retval);
1217}
1218
1219
1220
1221/**
1222 * Add specified file/slice to the internal catalog of all archives written.
1223 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1224 * write the last [buffer size] MB from the catalog to the new tape, so we know
1225 * we have @e all archives on some CD/tape/whatever.
1226 * @param type The type of file we're cataloging (afioball, slice, something else)
1227 * @param number The fileset number or biggiefile number.
1228 * @param aux The slice number if it's a biggiefile, or any other additional info.
1229 * @param fn The original full pathname of the file we're recording.
1230 * @return The index of the record we just added.
1231 */
1232int register_in_tape_catalog(t_archtype type, int number, long aux,
1233                             char *fn)
1234{
1235    int last;
1236    char fname[MAX_TAPECAT_FNAME_LEN];
1237    char *p;
1238
1239    p = strrchr(fn, '/');
1240    if (p) {
1241        p++;
1242    } else {
1243        p = fn;
1244    }
1245    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1246    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1247    last = g_tapecatalog->entries;
1248    if (last >= MAX_TAPECATALOG_ENTRIES) {
1249        log_it
1250            ("Warning - can't log #%d in tape catalog - too many entries already",
1251             number);
1252        return (-1);
1253    }
1254    g_tapecatalog->el[last].type = type;
1255    g_tapecatalog->el[last].number = number;
1256    g_tapecatalog->el[last].aux = aux;
1257    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1258    strcpy(g_tapecatalog->el[last].fname, fname);
1259    g_tapecatalog->entries++;
1260    return (last);              // returns the index of the record we've jsut added
1261}
1262
1263
1264
1265
1266/**
1267 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1268 * (got SIGPIPE) or look like we will.
1269 * @param mediasize The size of the tape in megabytes.
1270 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1271 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1272 * autodetecting the size. Huh?
1273 */
1274
1275/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1276bool
1277should_we_write_to_next_tape(long mediasize,
1278                             off_t length_of_incoming_file)
1279{
1280    /*@ bool's ***************************************************** */
1281    bool we_need_a_new_tape = FALSE;
1282
1283    /*@ end vars *************************************************** */
1284
1285    if (mediasize == 0) {
1286        return (FALSE);
1287    }
1288    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1289        log_it("mediasize = %ld", mediasize);
1290        we_need_a_new_tape = TRUE;
1291        log_to_screen("Should have started a new tape/CD already");
1292    }
1293    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1294        mediasize - (SLICE_SIZE * 4 / 1024)) {
1295        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1296               mediasize);
1297        we_need_a_new_tape = TRUE;
1298    }
1299    return (we_need_a_new_tape);
1300}
1301
1302
1303/**
1304 * Seek through the stream until we find a header block where the NAME field matches
1305 * @p the_file_I_was_reading. This is useful if you've just started reading from
1306 * a new tape and want to find the file you were reading when the tape ended.
1307 * @param the_file_I_was_reading File name to look for.
1308 * @return 0 for success, nonzero for failure.
1309 */
1310int skip_incoming_files_until_we_find_this_one(char
1311                                               *the_file_I_was_reading)
1312{
1313    char *pA;
1314    char *pB;
1315    int res;
1316    int ctrl_chr;
1317    char *temp_fname;
1318    char *datablock;
1319    long long temp_size, size;
1320    long bytes_to_write;
1321
1322    datablock = malloc(TAPE_BLOCK_SIZE);
1323    malloc_string(temp_fname);
1324    pB = strrchr(the_file_I_was_reading, '/');
1325    if (pB) {
1326        pB++;
1327    } else {
1328        pB = the_file_I_was_reading;
1329    }
1330    log_msg(1, "skip_incoming_..(%s)", pB);
1331    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1332    ctrl_chr = -1;
1333    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1334        res =
1335            read_header_block_from_stream(&temp_size, temp_fname,
1336                                          &ctrl_chr);
1337        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1338            break;
1339        }
1340        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1341        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1342        log_msg(3, "Still trying to re-sync w/ tape");
1343    }
1344    while (ctrl_chr != BLK_START_FILE) {
1345        res =
1346            read_header_block_from_stream(&temp_size, temp_fname,
1347                                          &ctrl_chr);
1348        if (ctrl_chr == BLK_START_FILE) {
1349            break;
1350        }
1351        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1352        wrong_marker(BLK_START_FILE, ctrl_chr);
1353        log_msg(3, "Still trying to re-sync w/ tape");
1354    }
1355    pA = strrchr(temp_fname, '/');
1356    if (pA) {
1357        pA++;
1358    } else {
1359        pA = temp_fname;
1360    }
1361    pB = strrchr(the_file_I_was_reading, '/');
1362    if (pB) {
1363        pB++;
1364    } else {
1365        pB = the_file_I_was_reading;
1366    }
1367    while (strcmp(pA, pB)) {
1368        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1369                the_file_I_was_reading);
1370        for (size = temp_size; size > 0; size -= bytes_to_write) {
1371            bytes_to_write =
1372                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1373            // FIXME - needs error-checking and -catching
1374            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1375        }
1376        res =
1377            read_header_block_from_stream(&temp_size, temp_fname,
1378                                          &ctrl_chr);
1379        if (ctrl_chr != BLK_STOP_FILE) {
1380            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1381        }
1382        res =
1383            read_header_block_from_stream(&temp_size, temp_fname,
1384                                          &ctrl_chr);
1385        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1386            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1387        }
1388        res =
1389            read_header_block_from_stream(&temp_size, temp_fname,
1390                                          &ctrl_chr);
1391        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1392            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1393        }
1394        res =
1395            read_header_block_from_stream(&temp_size, temp_fname,
1396                                          &ctrl_chr);
1397        if (ctrl_chr != BLK_START_FILE) {
1398            wrong_marker(BLK_START_FILE, ctrl_chr);
1399        }
1400        pA = strrchr(temp_fname, '/');
1401        if (pA) {
1402            pA++;
1403        } else {
1404            pA = temp_fname;
1405        }
1406        pB = strrchr(the_file_I_was_reading, '/');
1407        if (pB) {
1408            pB++;
1409        } else {
1410            pB = the_file_I_was_reading;
1411        }
1412    }
1413    log_msg(2, "Reading %s (it matches %s)", temp_fname,
1414            the_file_I_was_reading);
1415    paranoid_free(temp_fname);
1416    paranoid_free(datablock);
1417    return (0);
1418}
1419
1420
1421/**
1422 * Start to read from the next tape. Assumes the user has already inserted it.
1423 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1424 * @return 0 for success, nonzero for failure.
1425 */
1426int start_to_read_from_next_tape()
1427{
1428    /*@ int ********************************************************* */
1429    int res = 0;
1430    char *sz_msg;
1431    int ctrlchr;
1432    long long temp_size;
1433    malloc_string(sz_msg);
1434    /*@ end vars *************************************************** */
1435
1436    paranoid_pclose(g_tape_stream);
1437    sync();
1438    sync();
1439    sync();
1440    log_it("Next tape requested.");
1441    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1442    log_it("Opening IN the next tape");
1443    if (!
1444        (g_tape_stream =
1445         open_device_via_buffer(bkpinfo->media_device, 'r',
1446                                bkpinfo->internal_tape_block_size))) {
1447        log_OS_error(g_tape_fifo);
1448        log_to_screen("Cannot openin stream device");
1449        return (1);
1450    }
1451    g_tape_posK = 0;
1452    g_sigpipe = FALSE;
1453    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1454    if (ctrlchr != BLK_START_OF_TAPE) {
1455        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1456    }
1457    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1458    if (ctrlchr != BLK_START_OF_BACKUP) {
1459        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1460    } else {
1461        log_msg(3, "Next tape opened OK. Whoopee!");
1462    }
1463    paranoid_free(sz_msg);
1464    return (res);
1465}
1466
1467
1468
1469/**
1470 * Start to write to the next tape. Assume the user has already inserted it.
1471 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1472 * @return 0 for success, nonzero for failure.
1473 */
1474int start_to_write_to_next_tape()
1475{
1476    int res = 0;
1477    char command[MAX_STR_LEN * 2];
1478    paranoid_pclose(g_tape_stream);
1479    system("sync");
1480    system("sync");
1481    system("sync");
1482    log_it("New tape requested.");
1483    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1484    if (g_current_media_number > MAX_NOOF_MEDIA) {
1485        res++;
1486        log_to_screen("Too many tapes. Man, you need to use nfs!");
1487    }
1488    if (bkpinfo->backup_media_type == cdstream) {
1489        sprintf(command,
1490                "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1491                bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE,
1492                MONDO_LOGFILE);
1493        log_it("Opening OUT to next CD with the command");
1494        log_it(command);
1495        log_it("Let's see what happens, shall we?");
1496        g_tape_stream = popen(command, "w");
1497        if (!g_tape_stream) {
1498            log_to_screen("Failed to openout to cdstream (fifo)");
1499            return (1);
1500        }
1501    } else {
1502        log_it("Opening OUT to next tape");
1503        if (!
1504            (g_tape_stream =
1505             open_device_via_buffer(bkpinfo->media_device, 'w',
1506                                    bkpinfo->internal_tape_block_size))) {
1507            log_OS_error(g_tape_fifo);
1508            log_to_screen("Cannot openin stream device");
1509            return (1);
1510        }
1511    }
1512    g_tape_posK = 0;
1513    g_sigpipe = FALSE;
1514    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1515    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1516    return (res);
1517}
1518
1519
1520
1521
1522/**
1523 * Write a bufferfull of the most recent archives to the tape. The
1524 * rationale behind this is a bit complex. If the previous tape ended
1525 * suddenly (EOF or otherwise) some archives were probably left in the
1526 * buffer. That means that Mondo thinks they have been written, but
1527 * the external binary @c buffer has not actually written them. So to
1528 * be safe, we start the new tape by writing the last bufferfull from
1529 * the old one. This insures that all archives will be on at least
1530 * one tape. Sounds inelegant, but it works.
1531 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1532 * @return 0 for success, nonzero for failure.
1533 */
1534int write_backcatalog_to_tape()
1535{
1536    int i, last, res = 0;
1537    char *fname;
1538
1539    log_msg(2, "I am now writing back catalog to tape");
1540    malloc_string(fname);
1541    last = g_tapecatalog->entries - 1;
1542    for (i = 0; i <= last; i++) {
1543        sprintf(fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir,
1544                g_tapecatalog->el[i].fname);
1545        if (!does_file_exist(fname)) {
1546            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1547        } else {
1548            write_header_block_to_stream(length_of_file(fname),
1549                                         "start-backcatalog-afio-or-slice",
1550                                         BLK_START_AN_AFIO_OR_SLICE);
1551            log_msg(2, "Writing %s", fname);
1552            if (write_file_to_stream_from_file(fname)) {
1553                res++;
1554                log_msg(2, "%s failed", fname);
1555            }
1556            if (i != last) {
1557                write_header_block_to_stream((off_t)0,
1558                                             "stop-backcatalog-afio-or-slice",
1559                                             BLK_STOP_AN_AFIO_OR_SLICE);
1560            }
1561        }
1562    }
1563    paranoid_free(fname);
1564    log_msg(2, "Finished writing back catalog to tape");
1565    return (res);
1566}
1567
1568
1569
1570/**
1571 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1572 * @param fname The path to all.tar.gz.
1573 * @return 0 for success, nonzero for failure.
1574 */
1575int write_data_disks_to_stream(char *fname)
1576{
1577    /*@ pointers *************************************************** */
1578    FILE *fin;
1579    char tmp[MAX_STR_LEN];
1580
1581    /*@ long ******************************************************* */
1582    long m = -1;
1583    long templong;
1584
1585    /*@ int ******************************************************** */
1586    int i, j;
1587
1588    /*@ buffers **************************************************** */
1589    char tempblock[256 * 1024];
1590
1591    /*@ end vars *************************************************** */
1592
1593    open_evalcall_form("Writing data disks to tape");
1594    log_to_screen("Writing data disks to tape");
1595    log_it("Data disks = %s", fname);
1596    if (!does_file_exist(fname)) {
1597        sprintf(tmp, "Cannot find %s", fname);
1598        log_to_screen(tmp);
1599        return (1);
1600    }
1601    if (!(fin = fopen(fname, "r"))) {
1602        log_OS_error(fname);
1603        fatal_error("Cannot openin the data disk");
1604    }
1605    for (i = 0; i < 32; i++) {  /* 32MB */
1606        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1607            if (!feof(fin)) {
1608                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1609            } else {
1610                m = 0;
1611            }
1612            for (; m < 256 * 1024; m++) {
1613                tempblock[m] = '\0';
1614            }
1615            g_tape_posK +=
1616                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1617        }
1618        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1619        {
1620            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1621            update_evalcall_form((int) (templong));
1622        }
1623    }
1624    paranoid_fclose(fin);
1625    close_evalcall_form();
1626    return (0);
1627}
1628
1629
1630
1631
1632/**
1633 * Copy @p infile to the opened stream (CD or tape).
1634 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1635 * @param infile The file to write to the stream.
1636 * @return 0 for success, nonzero for failure.
1637 */
1638int write_file_to_stream_from_file(char *infile)
1639{
1640    /*@ buffers **************************************************** */
1641    char tmp[MAX_STR_LEN];
1642    char datablock[TAPE_BLOCK_SIZE];
1643    char checksum[MAX_STR_LEN];
1644    char *infile_basename;
1645
1646    /*@ int ******************************************************** */
1647    int retval = 0;
1648    int noof_blocks;
1649
1650    /*  unsigned int ch; */
1651    unsigned int crc16;
1652    unsigned int crctt;
1653
1654    /*@ pointers *************************************************** */
1655    FILE *fin;
1656    char *p;
1657
1658    /*@ long ******************************************************* */
1659    long bytes_to_read = 0;
1660    long i;
1661
1662    off_t filesize;
1663
1664#ifdef EXTRA_TAPE_CHECKSUMS
1665    int ch;
1666#endif
1667
1668    /*@ initialize ************************************************ */
1669    crc16 = 0;
1670    crctt = 0;
1671
1672
1673
1674    /*@ end vars *************************************************** */
1675
1676    infile_basename = strrchr(infile, '/');
1677    if (infile_basename) {
1678        infile_basename++;
1679    } else {
1680        infile_basename = infile;
1681    }
1682    filesize = length_of_file(infile);
1683    if (should_we_write_to_next_tape
1684        (bkpinfo->media_size[g_current_media_number], filesize)) {
1685        start_to_write_to_next_tape();
1686        write_backcatalog_to_tape();
1687    }
1688    p = strrchr(infile, '/');
1689    if (!p) {
1690        p = infile;
1691    } else {
1692        p++;
1693    }
1694    sprintf(tmp, "Writing file '%s' to tape (%ld KB)", p,
1695            (long) filesize >> 10);
1696    log_it(tmp);
1697    write_header_block_to_stream(filesize, infile_basename,
1698                                 BLK_START_FILE);
1699//go_here_to_restart_saving_of_file:
1700    if (!(fin = fopen(infile, "r"))) {
1701        log_OS_error(infile);
1702        return (1);
1703    }
1704    for (noof_blocks = 0; filesize > 0;
1705         noof_blocks++, filesize -= bytes_to_read) {
1706        if (filesize < TAPE_BLOCK_SIZE) {
1707            bytes_to_read = (long) filesize;
1708            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1709                datablock[i] = '\0';
1710            }
1711        } else {
1712            bytes_to_read = TAPE_BLOCK_SIZE;
1713        }
1714        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1715        g_tape_posK +=
1716            fwrite(datablock, 1, /*bytes_to_read */ 
1717                   (size_t) TAPE_BLOCK_SIZE,
1718                   g_tape_stream) / 1024;
1719        if (g_sigpipe) {
1720            iamhere("Sigpipe occurred recently. I'll start a new tape.");
1721            fclose(fin);
1722            g_sigpipe = FALSE;
1723            start_to_write_to_next_tape();
1724            write_backcatalog_to_tape();    // kinda-sorta recursive :)
1725            return (0);
1726        }
1727#ifdef EXTRA_TAPE_CHECKSUMS
1728        for (i = 0; i < bytes_to_read; i++) {
1729            ch = datablock[i];
1730            crc16 = updcrcr(crc16, (unsigned) ch);
1731            crctt = updcrc(crctt, (unsigned) ch);
1732        }
1733#endif
1734    }
1735    paranoid_fclose(fin);
1736    sprintf(checksum, "%04x%04x", crc16, crctt);
1737    /* BERLIOS: what does it do ??? */
1738    write_header_block_to_stream((off_t)g_current_media_number, checksum,
1739                                 BLK_STOP_FILE);
1740//  log_it("File '%s' written to tape.", infile);
1741    return (retval);
1742}
1743
1744
1745
1746
1747
1748/**
1749 * Write a header block to the opened stream (CD or tape).
1750 * @param length_of_incoming_file The length to store in the header block.
1751 * Usually matters only if this is a file-related header, in which case it should
1752 * be the length of the file that will follow.
1753 * @param filename The filename to store in the header block. Usually matters
1754 * only if this is a file-related header, in which case this should be the name
1755 * if the file that will follow.
1756 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1757 * @return 0 for success, nonzero for failure.
1758 */
1759int
1760write_header_block_to_stream(off_t length_of_incoming_file,
1761                             char *filename, int control_char)
1762{
1763    /*@ buffers **************************************************** */
1764    char tempblock[TAPE_BLOCK_SIZE];
1765    char tmp[MAX_STR_LEN];
1766    char *p;
1767
1768    /*@ int ******************************************************** */
1769    int i;
1770
1771    off_t olen;
1772
1773    /*@ end vars *************************************************** */
1774
1775
1776    olen = length_of_incoming_file;
1777    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1778    if (!p) {
1779        p = filename;
1780    } else {
1781        p++;
1782    }
1783    if (!g_tape_stream) {
1784        log_to_screen
1785            ("You're not backing up to tape. Why write a tape header?");
1786        return (1);
1787    }
1788    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1789        tempblock[i] = 0;
1790    }
1791    sprintf(tempblock + 6000 + control_char, STR_HEADER);
1792    tempblock[7000] = control_char;
1793/*  for(i=0;i<8;i++) {tempblock[7001+i]=olen&0xff; olen>>=8;} */
1794    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1795/*  if (length_of_incoming_file) {memcpy(tempblock+7001,(char*)&length_of_incoming_file,sizeof(long long));} */
1796    strcpy(tempblock + 1000, filename);
1797/*  strcpy(tempblock+5555,cksum); */
1798    g_tape_posK +=
1799        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1800               g_tape_stream) / 1024;
1801    sprintf(tmp, "%s (fname=%s, size=%ld K)",
1802            marker_to_string(control_char), p,
1803            (long) length_of_incoming_file >> 10);
1804    log_msg(6, tmp);
1805/*  log_tape_pos(); */
1806    return (0);
1807}
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818/**
1819 * Log (to screen) an erroneous marker, along with what it should have been.
1820 * @param should_be What we were expecting.
1821 * @param it_is What we got.
1822 */
1823void wrong_marker(int should_be, int it_is)
1824{
1825    /*@ buffer ***************************************************** */
1826    char tmp[MAX_STR_LEN];
1827
1828
1829    /*@ end vars *************************************************** */
1830    sprintf(tmp, "Wrong marker! (Should be %s, ",
1831            marker_to_string(should_be));
1832    sprintf(tmp + strlen(tmp), "is actually %s)", marker_to_string(it_is));
1833    log_to_screen(tmp);
1834}
1835
1836/* @} - end of streamGroup */
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