source: branches/3.0/mondo/src/common/libmondo-stream.c @ 3080

Last change on this file since 3080 was 3080, checked in by bruno, 6 years ago
  • Fix #249 by changing the wrong affectation of fname (patch from Jean Philippe Mohler jpmohler_at_h2i.fr)
  • Property svn:keywords set to Id
File size: 51.2 KB
Line 
1/* libmondo-stream.c
2   $Id: libmondo-stream.c 3080 2013-01-25 03:09:59Z bruno $
3
4...tools for talking to tapes, Monitas streams, etc.
5
6*/
7
8
9/**
10 * @file
11 * Functions for writing data to/reading data from streams (tape, CD stream, etc.)
12 */
13
14#include "my-stuff.h"
15#include "mr_mem.h"
16#include "mondostructures.h"
17#include "libmondo-devices.h"
18#include "lib-common-externs.h"
19#include "libmondo-stream.h"
20#include "libmondo-string-EXT.h"
21#include "libmondo-files-EXT.h"
22#include "libmondo-gui-EXT.h"
23#include "libmondo-fork-EXT.h"
24#include "libmondo-tools-EXT.h"
25#include "libmondo-fifo-EXT.h"
26
27#define EXTRA_TAPE_CHECKSUMS
28#define STR_HEADER  "Mondolicious, baby"
29
30/*@unused@*/
31//static char cvsid[] = "$Id: libmondo-stream.c 3080 2013-01-25 03:09:59Z bruno $";
32extern bool g_sigpipe;
33extern int g_tape_buffer_size_MB;
34
35extern char *g_getfacl;
36extern char *g_getfattr;
37extern char *MONDO_LOGFILE;
38
39/* Reference to global bkpinfo */
40extern struct s_bkpinfo *bkpinfo;
41
42/**
43 * @addtogroup globalGroup
44 * @{
45 */
46/**
47 * The file pointer for the opened tape/CD stream.
48 * Opened and closed by openin_tape(), openin_cdstream(),
49 * openout_tape(), openout_cdstream(), closein_tape(), closein_cdstream(),
50 * closeout_tape(), and closeout_cdstream().
51 */
52FILE *g_tape_stream = NULL;
53
54
55/**
56 * The position (in kilobytes) where we are on the tape.
57 */
58long long g_tape_posK = 0;
59
60/**
61 * The current media number we're using. This value is 1-based.
62 */
63int g_current_media_number = -1;
64
65/**
66 * The tape catalog that keeps track of files written to tape.
67 */
68struct s_tapecatalog *g_tapecatalog;
69
70/* @} - end of globalGroup */
71
72int write_backcatalog_to_tape();
73
74
75
76
77
78/**
79 * @addtogroup streamGroup
80 * @{
81 */
82/**
83 * Close the global output file descriptor which Mondo has used to read
84 * from the CD stream.
85 * @param bkpinfo The backup information structure. Passed directly to closein_tape().
86 * @return 0 for success, nonzero for failure.
87 * @note This should be called by restore processes only.
88 */
89int closein_cdstream()
90{
91    return (closein_tape());
92}
93
94
95/**
96 * Close the global output file descriptor which Mondo has used to read
97 * from buffer or dd, which read from the tape.
98 * @param bkpinfo The backup information structure. Unused.
99 * @return 0 for success, nonzero for failure.
100 * @note This should be called by restore processes only.
101 * @note This function also works for cdstreams for now, but don't count on this behavior.
102 * @bug @p bkpinfo parameter is unused.
103 */
104int closein_tape()
105{
106    /*@ int's ******************************************************* */
107    int retval = 0;
108    int res = 0;
109    int ctrl_chr = '\0';
110
111    /*@ buffers ***************************************************** */
112    char fname[MAX_STR_LEN];
113
114    /*@ long long's ************************************************* */
115    long long size;
116    char *blk;
117    int i;
118    int j;
119
120    blk = (char *) malloc(256 * 1024);
121
122    log_it("closein_tape() -- entering");
123    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
124    retval += res;
125    if (ctrl_chr != BLK_END_OF_BACKUP) {
126        wrong_marker(BLK_END_OF_BACKUP, ctrl_chr);
127    }
128    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
129    retval += res;
130    if (ctrl_chr != BLK_END_OF_TAPE) {
131        wrong_marker(BLK_END_OF_TAPE, ctrl_chr);
132    }
133    for (i = 0; i < 8 && !feof(g_tape_stream); i++) {
134        j = fread(blk, 1, 256 * 1024, g_tape_stream);
135        if (j) {
136            // FIXME
137        }
138    }
139    sleep(1);
140    paranoid_system("sync");
141    sleep(1);
142    paranoid_pclose(g_tape_stream);
143    log_it("closein_tape() -- leaving");
144/*
145  for(i=0; i < g_tapecatalog->entries; i++)
146    {
147      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);
148    }
149*/
150    if (!bkpinfo->please_dont_eject) {
151        eject_device(bkpinfo->media_device);
152    }
153    paranoid_free(blk);
154    paranoid_free(g_tapecatalog);
155    return (retval);
156}
157
158
159
160/**
161 * Close the global output file descriptor which Mondo has been using to write
162 * to the tape device (via buffer or dd).
163 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
164 * @return 0 for success, nonzero for failure.
165 * @note This should be called by backup processes only.
166 */
167int closeout_tape()
168{
169    /*@ int's ******************************************************* */
170    int retval = 0;
171//  int res = 0;
172//  int ctrl_chr = '\0';
173
174    /*@ buffers ***************************************************** */
175//  char fname[MAX_STR_LEN];
176
177    /*@ long long's ************************************************* */
178//  long long size;
179    int i;
180    char *blk;
181
182    blk = (char *) malloc(256 * 1024);
183
184    sleep(1);
185    paranoid_system("sync");
186    sleep(1);
187    log_it("closeout_tape() -- entering");
188    retval +=
189        write_header_block_to_stream((off_t)0, "end-of-backup",
190                                     BLK_END_OF_BACKUP);
191    retval += write_header_block_to_stream((off_t)0, "end-of-tape", BLK_END_OF_TAPE);   /* just in case */
192/* write 1MB of crap */
193    for (i = 0; i < 256 * 1024; i++) {
194        blk[i] = (int) (random() & 0xFF);
195    }
196    for (i = 0; i < 4 * 8; i++) {
197        if (fwrite(blk, 1, 256 * 1024, g_tape_stream)) {
198            //FIXME
199        }
200        if (should_we_write_to_next_tape
201            (bkpinfo->media_size[g_current_media_number], (off_t)256 * 1024)) {
202            start_to_write_to_next_tape();
203        }
204    }
205/* write 1MB of zeroes */
206/*
207    for (i = 0; i < 256*1024; i++)
208      {
209        blk[i] = 0;
210      }
211    for (i = 0; i < 4; i++)
212      {
213        fwrite (blk, 1, 256*1024, g_tape_stream);
214        if (should_we_write_to_next_tape (bkpinfo->media_size[g_current_media_number], 256*1024))
215          {
216            start_to_write_to_next_tape ();
217          }
218      }
219*/
220    sleep(2);
221    paranoid_pclose(g_tape_stream);
222    log_it("closeout_tape() -- leaving");
223    for (i = 0; i < g_tapecatalog->entries; i++) {
224        log_it("i=%d type=%s num=%d aux=%ld posK=%lld", i,
225               (g_tapecatalog->el[i].type ==
226                fileset) ? "fileset" : "bigslice",
227               g_tapecatalog->el[i].number, g_tapecatalog->el[i].aux,
228               g_tapecatalog->el[i].tape_posK);
229    }
230    //  if (!bkpinfo->please_dont_eject)
231    //    { eject_device(bkpinfo->media_device); }
232    paranoid_free(blk);
233    paranoid_free(g_tapecatalog);
234    return (retval);
235}
236
237
238
239bool mt_says_tape_exists(char *dev)
240{
241    char *command = NULL;
242    int res;
243
244    mr_asprintf(&command, "mt -f %s status", dev);
245    res = run_program_and_log_output(command, 1);
246    mr_free(command);
247
248    if (res) {
249        return (FALSE);
250    } else {
251        return (TRUE);
252    }
253}
254
255
256
257/**
258 * Determine the name and size of the tape device. Tries the SCSI tape for
259 * this platform, then the IDE tape, then "/dev/st0", then "/dev/osst0".
260 * @param dev Where to put the found tape device.
261 * @param siz Where to put the tape size (a string like "4GB")
262 * @return 0 if success, nonzero if failure (in which @p dev and @p siz are undefined).
263 */
264int find_tape_device_and_size(char *dev, char *siz)
265{
266    char tmp[MAX_STR_LEN];
267    char *command = NULL;
268    char cdr_exe[MAX_STR_LEN];
269    int res;
270
271    log_to_screen("I am looking for your tape streamer. Please wait.");
272    dev[0] = siz[0] = '\0';
273    if (find_home_of_exe("cdrecord")) {
274        strcpy(cdr_exe, "cdrecord");
275    } else {
276        strcpy(cdr_exe, "dvdrecord");
277    }
278    mr_asprintf(&command, "%s -scanbus 2> /dev/null | grep -i tape | wc -l",
279            cdr_exe);
280    strcpy(tmp, call_program_and_get_last_line_of_output(command));
281    mr_free(command);
282
283    if (atoi(tmp) != 1) {
284        log_it
285            ("Either too few or too many tape streamers for me to detect...");
286        strcpy(dev, VANILLA_SCSI_TAPE);
287        return 1;
288    }
289    mr_asprintf(&command,
290            "%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",
291            cdr_exe);
292    strcpy(tmp, call_program_and_get_last_line_of_output(command));
293    mr_free(command);
294
295    if (strlen(tmp) < 2) {
296        log_it("Could not find tape device");
297        return 1;
298    }
299    mr_asprintf(&command,
300            "%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",
301            cdr_exe);
302    strcpy(tmp, call_program_and_get_last_line_of_output(command));
303    mr_free(command);
304
305    strcpy(dev, VANILLA_SCSI_TAPE);
306    dev[strlen(dev) - 1] = '\0';
307    strcat(dev, tmp);           // e.g. '/dev/st0' becomes '/dev/stN'
308    res = 0;
309    if (!mt_says_tape_exists(dev)) {
310        strcpy(dev, ALT_TAPE);
311        if (!mt_says_tape_exists(dev)) {
312            log_it("Cannot openin %s", dev);
313            strcpy(dev, "/dev/st0");
314            if (!mt_says_tape_exists(dev)) {
315                log_it("Cannot openin %s", dev);
316                strcpy(dev, "/dev/osst0");
317                if (!mt_says_tape_exists(dev)) {
318                    res++;
319                } else {
320                    res = 0;
321                }
322            }
323        }
324    }
325
326    log_it("At this point, dev = %s and res = %d", dev, res);
327
328    strcpy(tmp, call_program_and_get_last_line_of_output("\
329cdrecord -scanbus 2> /dev/null | tr -s '\t' ' ' | \
330grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE | \
331awk '{for(i=1; i<NF; i++) { if (index($i, \"GB\")>0) { print $i;};};};'"));
332
333    if (mt_says_tape_exists(dev)) {
334        res = 0;
335    } else {
336        log_it("Turning %s", dev);
337        strcpy(tmp, (strrchr(dev, '/') != NULL) ? strrchr(dev, '/') : dev);
338        sprintf(dev, "/dev/os%s", tmp);
339        log_it("...into %s", dev);
340        if (mt_says_tape_exists(dev)) {
341            res = 0;
342        } else {
343            res++;
344        }
345    }
346
347    siz[0] = '\0';
348    log_it("res=%d; dev=%s", res, dev);
349
350    if (res) {
351        return (res);
352    }
353
354    if (strlen(tmp) < 2) {
355        siz[0] = '\0';
356        log_it("Warning - size of tape unknown");
357        return (0);
358    } else {
359        strcpy(siz, tmp);
360        return (0);
361    }
362}
363
364
365
366
367
368
369int read_EXAT_files_from_tape(long long *ptmp_size, char *tmp_fname,
370                              int *pctrl_chr, char *xattr_fname,
371                              char *acl_fname)
372{
373    int res = 0;
374    char fname_buf[PATH_MAX];
375    char *fname = (char *)fname_buf;                    /* Should NOT be NULL */
376    char *tmp = NULL;
377
378    // xattr
379    if (g_getfattr) {
380        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
381        if (*pctrl_chr != BLK_START_EXAT_FILE) {
382            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
383        }
384        if (strstr(fname, "xattr") == NULL) {
385            mr_asprintf(&tmp,"Wrong order expected xattr, got %s, sunshine.", fname);
386            fatal_error(tmp);
387        }
388        read_file_from_stream_to_file(xattr_fname, *ptmp_size);
389        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
390        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
391            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
392        }
393        log_msg(1, "Got xattr");
394        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
395        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
396            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
397        }
398        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
399        if (*pctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
400            log_msg(1, "No acl attributes found, skipping to afio files");
401            return(0);
402        } else {
403            if (*pctrl_chr != BLK_START_EXTENDED_ATTRIBUTES) {
404                wrong_marker(BLK_START_EXTENDED_ATTRIBUTES, *pctrl_chr);
405            }
406        }
407    }
408    // acl
409    if (g_getfacl) {
410        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
411        if (*pctrl_chr != BLK_START_EXAT_FILE) {
412            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
413        }
414        if (strstr(fname, "acl") == NULL) {
415            mr_asprintf(&tmp,"Wrong order expected acl, got %s, sunshine.", fname);
416            fatal_error(tmp);
417        }
418        read_file_from_stream_to_file(acl_fname, *ptmp_size);
419        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
420        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
421            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
422        }
423        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
424        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
425            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
426        }
427        log_msg(1, "Got acl");
428    }
429    // tarball itself
430    res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
431    log_msg(1, "End of extended attributes, now looking for afioball");
432    return (0);
433}
434
435
436int write_EXAT_files_to_tape(char *xattr_fname,
437                             char *acl_fname)
438{
439    int res = 0;
440    if (g_getfattr) {
441    // xattr
442        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
443                             BLK_START_EXTENDED_ATTRIBUTES);
444        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
445                             BLK_START_EXAT_FILE);
446        write_file_to_stream_from_file(xattr_fname);
447        write_header_block_to_stream((off_t)-1, xattr_fname, BLK_STOP_EXAT_FILE);
448        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
449                             BLK_STOP_EXTENDED_ATTRIBUTES);
450    }
451    if (g_getfacl) {
452    // acl
453        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
454                             BLK_START_EXTENDED_ATTRIBUTES);
455        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
456                             BLK_START_EXAT_FILE);
457        write_file_to_stream_from_file(acl_fname);
458        write_header_block_to_stream((off_t)-1, acl_fname, BLK_STOP_EXAT_FILE);
459        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
460                             BLK_STOP_EXTENDED_ATTRIBUTES);
461    }
462    return (res);
463}
464
465
466
467
468/**
469 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
470 * @param tapeno The tape number to insist on.
471 * @bug There is currently no way to actually verify that the user has actually
472 * inserted the right tape.
473 */
474void insist_on_this_tape_number(int tapeno)
475{
476    int i;
477    char *tmp = NULL;
478
479    log_it("Insisting on tape #%d", tapeno);
480    if (g_current_media_number != tapeno) {
481        mr_asprintf(&tmp,
482                "When the tape drive goes quiet, please insert volume %d in this series.",
483                tapeno);
484        popup_and_OK(tmp);
485        mr_free(tmp);
486        open_evalcall_form("Waiting while the tape drive settles");
487    } else {
488        open_evalcall_form("Waiting while the tape drive rewinds");
489    }
490
491    for (i = 0; i <= 100; i += 2) {
492        usleep(100000);
493        update_evalcall_form(i);
494    }
495    close_evalcall_form();
496    log_it("I assume user has inserted it. They _say_ they have...");
497    g_current_media_number = tapeno;
498
499    //  log_it("g_current_media_number = %d", g_current_media_number);
500    log_it("OK, I've finished insisting. On with the revelry.");
501}
502
503
504
505
506/**
507 * Debugging aid - log the offset we're at on the tape (reading or writing).
508 */
509void log_tape_pos(void)
510{
511    /*@ buffers ***************************************************** */
512
513
514    /*@ end vars *************************************************** */
515
516    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
517           (long) g_tape_posK >> 10);
518}
519
520
521
522
523/**
524 * Add a file to a collection of recently archived filesets/slices.
525 * The type is determined by the filename: if it contains ".afio." it is
526 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
527 * otherwise we generate a fatal_error().
528 * @param td The current @c bkpinfo->tempdir (file will be placed in <tt>td</tt>/tmpfs/backcatalog/).
529 * @param latest_fname The file to place in the collection.
530 * @return 0, always.
531 * @bug Return value is redundant.
532 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
533 */
534int maintain_collection_of_recent_archives(char *td, char *latest_fname)
535{
536    long long final_alleged_writeK, final_projected_certain_writeK,
537        cposK, bufsize_K;
538    int last, curr, i;
539    char *command = NULL;
540    char *tmpdir = NULL;
541    char *old_fname = NULL;
542    char *p;
543    char suffix[16];
544
545    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
546    if ((p = strrchr(latest_fname, '.'))) {
547        strcpy(suffix, ++p);
548    } else {
549        suffix[0] = '\0';
550    }
551    mr_asprintf(&tmpdir, "%s/tmpfs/backcatalog", td);
552    mkdir(tmpdir, 0x700);
553    mr_asprintf(&command, "cp -f %s %s", latest_fname, tmpdir);
554    if (run_program_and_log_output(command, 6)) {
555        log_it("Warning - failed to copy %s to backcatalog at %s",
556               latest_fname, tmpdir);
557    }
558    mr_free(command);
559
560    last = g_tapecatalog->entries - 1;
561    if (last <= 0) {
562        log_it("Too early to start deleting from collection.");
563        mr_free(tmpdir);
564        return (0);
565    }
566    final_alleged_writeK = g_tapecatalog->el[last].tape_posK;
567    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
568    for (curr = last; curr >= 0; curr--) {
569        cposK = g_tapecatalog->el[curr].tape_posK;
570        if (cposK < final_projected_certain_writeK) {
571            break;
572        }
573    }
574    if (curr < 0) {
575        log_it("Not far enough into tape to start deleting old archives from collection.");
576        mr_free(tmpdir);
577        return (0);
578    }
579
580    for (i = curr - 1; i >= 0 && curr - i < 10; i--) {
581        mr_asprintf(&old_fname, "%s/%s", tmpdir, g_tapecatalog->el[i].fname);
582        unlink(old_fname);
583        mr_free(old_fname);
584    }
585    mr_free(tmpdir);
586    return (0);
587}
588
589
590
591
592/**
593 * Open the CD stream for input.
594 * @param bkpinfo The backup information structure. Passed to openin_tape().
595 * @return 0 for success, nonzero for failure.
596 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
597 */
598int openin_cdstream()
599{
600    return (openin_tape());
601}
602
603/**
604 * FIFO used to read/write to the tape device.
605 * @bug This seems obsolete now that we call an external @c buffer program. Please look onto this.
606 */
607char g_tape_fifo[MAX_STR_LEN];
608
609
610
611int set_tape_block_size_with_mt(long internal_tape_block_size)
612{
613    char *tmp = NULL;
614    int res;
615
616    if (strncmp(bkpinfo->media_device, "/dev/", 5)) {
617        log_msg(1,
618                "Not using 'mt setblk'. This isn't an actual /dev entry.");
619        return (0);
620    }
621    mr_asprintf(&tmp, "mt -f %s setblk %ld", bkpinfo->media_device, internal_tape_block_size);
622    res = run_program_and_log_output(tmp, 3);
623    mr_free(tmp);
624    return (res);
625}
626
627/**
628 * Return the non-rewinding device when passed the normal one
629 * @param tapedev The tape device to open for writing.
630 * @note the caller needs to free the string returned
631 */
632char *get_non_rewind_dev(char *tapedev)
633{
634
635    char *ntapedev = NULL;
636    char *p = NULL;
637    char *q = NULL;
638    char *r = NULL;
639
640    ntapedev = (char *)malloc(strlen(tapedev)+sizeof(char));
641    p = strrchr(tapedev,'/');
642    if (p == NULL) {
643        log_it("Didn't find a '/' in %s",tapedev);
644        return(NULL);
645    }
646
647    /* Copy tapedev content up to the last / */
648    q = tapedev;
649    r = ntapedev;
650    while (q != p) {
651        *r = *q;
652        r++;
653        q++;
654    }
655    /* Copy the '/' */
656    *r = *q;
657    r++;
658    q++;
659    /* Adds a 'n' - non-rewinding */
660    *r = 'n';
661    r++;
662    /* Copy the rest of tapedev */
663    while (*q != '\0') {
664        *r = *q;
665        r++;
666        q++;
667    }
668    *r = '\0';
669    if (mt_says_tape_exists(ntapedev)) {
670        log_it("Non-rewinding tape device is %s",ntapedev);
671    } else {
672        log_it("Unable to find non-rewinding tape device.");
673        ntapedev = NULL;
674    }
675    return(ntapedev);
676}
677
678
679
680/**
681 * Handle OBDR if we were asked to do so
682 * @param tapedev The tape device to open for reading.
683 */
684int skip_obdr(void)
685{
686    char *command = NULL;
687    int res = 0;
688
689    log_it("Skipping OBDR headers");
690    mr_asprintf(&command, "mt -f %s rewind",bkpinfo->media_device);
691    res = run_program_and_log_output(command, 1);
692    paranoid_free(command);
693
694    mr_asprintf(&command, "mt -f %s fsf 2",bkpinfo->media_device);
695    res = run_program_and_log_output(command, 1);
696    paranoid_free(command);
697
698    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
699    return(res);
700}
701
702/**
703 * Handle OBDR if we were asked to do so
704 * @param tapedev The tape device to open for writing.
705 * @return 0 for success, nonzero for failure.
706 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
707 * EXISTING DATA on the tape!
708 */
709int create_obdr(void)
710{
711
712    char *command = NULL;
713    int res = 0;
714
715    log_it("Creating OBDR headers");
716    /* OBDR: First block 10 kB of zero bs = 512 */
717    mr_asprintf(&command, "mt -f %s compression off",bkpinfo->media_device);
718    res = run_program_and_log_output(command, 1);
719    paranoid_free(command);
720
721    mr_asprintf(&command, "mt -f %s rewind",bkpinfo->media_device);
722    res += run_program_and_log_output(command, 1);
723    paranoid_free(command);
724
725    set_tape_block_size_with_mt(512);
726
727    mr_asprintf(&command, "dd if=/dev/zero of=%s bs=512 count=20",bkpinfo->media_device);
728    res += run_program_and_log_output(command, 1);
729    paranoid_free(command);
730
731    /* OBDR: then ISO boot image bs = 2048 */
732    set_tape_block_size_with_mt(2048);
733
734    mr_asprintf(&command, "dd if=%s of=%s bs=2048",MINDI_CACHE"/mondorescue.iso",bkpinfo->media_device);
735    res += run_program_and_log_output(command, 1);
736    paranoid_free(command);
737
738    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
739
740    /* restore compression mode on */
741    mr_asprintf(&command, "mt -f %s compression on",bkpinfo->media_device);
742    res = run_program_and_log_output(command, 1);
743    paranoid_free(command);
744
745    return(res);
746}
747
748
749/**
750 * Open the tape device for input.
751 * @param bkpinfo The backup information structure. Fields used:
752 * - @c bkpinfo->media_device
753 * - @c bkpinfo->tmpdir
754 * @return 0 for success, nonzero for failure.
755 * @note This will also work with a cdstream for now, but don't count on this behavior.
756 */
757int openin_tape()
758{
759    /*@ buffer ***************************************************** */
760    char fname[MAX_STR_LEN];
761    char *datablock;
762    char *tmp = NULL;
763    char old_cwd[MAX_STR_LEN];
764    char *outfname = NULL;
765    /*@ int ******************************************************* */
766    int i;
767    int j;
768    int res = 0;
769    long length, templong;
770    size_t k;
771    int retval = 0;
772    int ctrl_chr;
773
774    /*@ long long ************************************************* */
775    long long size;
776
777    /*@ pointers ************************************************** */
778    FILE *fout;
779
780    /*@ end vars *************************************************** */
781
782    assert_string_is_neither_NULL_nor_zerolength(bkpinfo->media_device);
783    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
784        fatal_error("Cannot alloc mem for tape catalog");
785    }
786    g_tapecatalog->entries = 0;
787    g_tape_posK = 0;
788    if (g_tape_stream) {
789        log_it("FYI - I won't 'openin' the tape. It's already open.");
790        return (0);
791    }
792
793    // mondoarchive should have configured everything to give the right non-rew device
794    if ((bkpinfo->use_obdr) && (bkpinfo->media_device != NULL)) {
795        res = skip_obdr();
796        if (res != 0) {
797            log_it("Not able to skip OBDR - Restore will have to be done manually");
798        }
799    } else {
800        if (bkpinfo->media_device == NULL) {
801            log_it("Not able to skip OBDR - Restore will have to be done manually");
802        }
803        set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
804    }
805
806    insist_on_this_tape_number(1);
807    mr_asprintf(&outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
808    make_hole_for_file(outfname);
809
810//  start_buffer_process( bkpinfo->media_device, g_tape_fifo, FALSE);
811    log_it("Opening IN tape");
812    if (!
813        (g_tape_stream =
814         open_device_via_buffer(bkpinfo->media_device, 'r',
815                                bkpinfo->internal_tape_block_size))) {
816        log_OS_error(g_tape_fifo);
817        log_to_screen("Cannot openin stream device");
818        mr_free(outfname);
819        return (1);
820    }
821    log_to_screen("Reading stream");
822    log_it("stream device = '%s'", bkpinfo->media_device);
823/* skip data disks */
824    open_evalcall_form("Skipping data disks on stream");
825    log_to_screen("Skipping data disks on stream");
826    if (!(fout = fopen(outfname, "w"))) {
827        log_OS_error(outfname);
828        log_to_screen("Cannot openout datadisk all.tar.gz file");
829        mr_free(outfname);
830        return (-1);
831    }
832    if (!(datablock = (char *) malloc(256 * 1024))) {
833        log_to_screen("Unable to malloc 256*1024");
834        mr_free(outfname);
835        finish(1);
836    }
837    for (i = 0; i < 32; i++) {
838        for (j = 0; j < 4; j++) {
839            for (length = 0, k = 0; length < 256 * 1024; length += k) {
840                k = fread(datablock + length, 1, 256 * 1024 - length,
841                          g_tape_stream);
842            }
843            if (fwrite(datablock, 1, (size_t) length, fout)) {
844                // FIXME
845            }
846            g_tape_posK += length / 1024;
847        }
848        if (i > 8)              // otherwise, 'buffer' distorts calculations
849        {
850            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
851            update_evalcall_form((int) (templong));
852        }
853    }
854    paranoid_fclose(fout);
855    paranoid_free(datablock);
856
857/* find initial blocks */
858    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
859    retval += res;
860    if (ctrl_chr != BLK_START_OF_TAPE) {
861        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
862    }
863    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
864    retval += res;
865    if (ctrl_chr != BLK_START_OF_BACKUP) {
866        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
867    }
868    close_evalcall_form();
869    log_it("Saved all.tar.gz to '%s'", outfname);
870    if (getcwd(old_cwd, MAX_STR_LEN)) {
871        // FIXME
872    }
873    if (chdir(bkpinfo->tmpdir)) {
874        // FIXME
875    }
876    mr_asprintf(&tmp, "tar -zxf %s ./tmp/mondo-restore.cfg 2> /dev/null",
877            outfname);
878    paranoid_system(tmp);
879    mr_free(tmp);
880
881    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
882    if (chdir(old_cwd)) {
883        // FIXME
884    }
885    unlink(outfname);
886    mr_free(outfname);
887    return (retval);
888}
889
890
891/**
892 * Start writing to a CD stream.
893 * @param cddev The CD device to openout via cdrecord.
894 * @param speed The speed to write at.
895 * @return 0 for success, nonzero for failure.
896 * @note This should be called only from backup processes.
897 */
898int openout_cdstream(char *cddev, int speed)
899{
900    /*@ buffers ***************************************************** */
901    char *command = NULL;
902
903    /*@ end vars *************************************************** */
904
905    /*  add 'dummy' if testing */
906    mr_asprintf(&command, "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s", cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
907    /*  initialise the catalog */
908    g_current_media_number = 1;
909    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
910        fatal_error("Cannot alloc mem for tape catalog");
911    }
912    g_tapecatalog->entries = 0;
913    /* log stuff */
914    log_it("Opening OUT cdstream with the command");
915    log_it(command);
916    /*  log_it("Let's see what happens, shall we?"); */
917    g_tape_stream = popen(command, "w");
918    mr_free(command);
919
920    if (g_tape_stream) {
921        return (0);
922    } else {
923        log_to_screen("Failed to openout to cdstream (fifo)");
924        return (1);
925    }
926}
927
928
929/**
930 * Start writing to a tape device for the backup.
931 * Handle OBDR if we were asked to do so
932 * @param tapedev The tape device to open for writing.
933 * @return 0 for success, nonzero for failure.
934 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
935 * EXISTING DATA on the tape!
936 */
937int openout_tape() {
938
939g_current_media_number = 1;
940if (g_tape_stream) {
941    log_it("FYI - I won't 'openout' the tape. It's already open.");
942    return (0);
943}
944if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
945    fatal_error("Cannot alloc mem for tape catalog");
946}
947g_tapecatalog->entries = 0;
948g_tape_posK = 0;
949
950if (bkpinfo->use_obdr) {
951    create_obdr();
952} else {
953    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
954}
955log_it("Opening OUT tape");
956if (!
957    (g_tape_stream =
958     open_device_via_buffer(bkpinfo->media_device, 'w', bkpinfo->internal_tape_block_size))) {
959    log_OS_error(g_tape_fifo);
960    log_to_screen("Cannot openin stream device");
961    return (1);
962}
963return (0);
964}
965
966
967
968
969/**
970 * Copy a file from the opened stream (CD or tape) to @p outfile.
971 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
972 * @param outfile The file to write to.
973 * @param size The size of the file in the input stream.
974 * @return 0 for success, nonzero for failure.
975 */
976int
977read_file_from_stream_to_file(char *outfile, long long size)
978{
979
980    /*@ int ******************************************************** */
981    int res;
982
983    /*@ end vars *************************************************** */
984
985    res = read_file_from_stream_FULL(outfile, NULL, size);
986
987    return (res);
988}
989
990
991
992/**
993 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
994 * by @p fout.
995 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
996 * @param fout The stream to write the file to.
997 * @param size The size of the file in bytes.
998 * @return 0 for success, nonzero for failure.
999 */
1000int
1001read_file_from_stream_to_stream(FILE * fout, long long size)
1002{
1003
1004    /*@ int ******************************************************** */
1005    int res;
1006
1007    /*@ end vars *************************************************** */
1008
1009    res = read_file_from_stream_FULL(NULL, fout, size);
1010/*  fflush(g_tape_stream);
1011  fflush(fout);*/
1012    return (res);
1013}
1014
1015
1016
1017/**
1018 * Copy a file from the currently opened stream (CD or tape) to either a
1019 * @c FILE pointer indicating a currently-opened file, or a filename indicating
1020 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
1021 * and read_file_from_stream_to_stream() are wrappers for.
1022 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1023 * @param outfname If non-NULL, write to this file.
1024 * @param foutstream If non-NULL, write to this stream.
1025 * @param orig_size The original length of the file in bytes.
1026 * @return 0 for success, nonzero for failure.
1027 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
1028 */
1029int
1030read_file_from_stream_FULL(char *outfname, FILE * foutstream, long long orig_size)
1031{
1032    /*@ buffers ***************************************************** */
1033    char *tmp = NULL;
1034    char *datablock;
1035    char *temp_fname;
1036    char *temp_cksum;
1037    char *actual_cksum = NULL;
1038//  char *pA, *pB;
1039
1040    /*@ int ********************************************************* */
1041    int retval = 0;
1042#ifdef EXTRA_TAPE_CHECKSUMS
1043    int i, ch;
1044#endif
1045    int noof_blocks;
1046    int ctrl_chr;
1047    int res;
1048    /*@ pointers **************************************************** */
1049    FILE *fout;
1050
1051    /*@ long    ***************************************************** */
1052    long bytes_to_write = 0L /*,i */ ;
1053//  long bytes_successfully_read_in_this_time = 0;
1054
1055    /*@ long long *************************************************** */
1056    long long temp_size, size;
1057    long bytes_read, bytes_to_read;
1058    long long total_read_from_tape_for_this_file = 0;
1059    long long where_I_was_before_tape_change = 0;
1060    /*@ unsigned int ************************************************ */
1061    /*  unsigned int ch; */
1062    unsigned int crc16;
1063    unsigned int crctt;
1064
1065    /*@ init  ******************************************************* */
1066    malloc_string(temp_fname);
1067    malloc_string(temp_cksum);
1068    datablock = malloc(TAPE_BLOCK_SIZE);
1069    crc16 = 0;
1070    crctt = 0;
1071    size = orig_size;
1072
1073    /*@ end vars *************************************************** */
1074
1075    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1076    if (res) {
1077        // FIXME
1078    }
1079    if (orig_size != temp_size && orig_size != -1) {
1080        mr_asprintf(&tmp, "output file's size should be %ld K but is apparently %ld K", (long) size >> 10, (long) temp_size >> 10);
1081        log_to_screen(tmp);
1082        mr_free(tmp);
1083    }
1084    if (ctrl_chr != BLK_START_FILE) {
1085        wrong_marker(BLK_START_FILE, ctrl_chr);
1086        return (1);
1087    }
1088
1089    if (foutstream) {
1090        fout = foutstream;
1091    } else {
1092        fout = fopen(outfname, "w");
1093    }
1094    if (!fout) {
1095        log_OS_error(outfname);
1096        log_to_screen("Cannot openout file");
1097        return (1);
1098    }
1099    total_read_from_tape_for_this_file = 0;
1100    for (noof_blocks = 0; size > 0;
1101         noof_blocks++, size -=
1102         bytes_to_write, total_read_from_tape_for_this_file +=
1103         bytes_read) {
1104        bytes_to_write =
1105            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1106        bytes_to_read = TAPE_BLOCK_SIZE;
1107        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1108        while (bytes_read < bytes_to_read) {    // next tape!
1109//    crctt=crc16=0;
1110            where_I_was_before_tape_change = size;
1111            log_msg(4, "where_I_was_... = %lld",
1112                    where_I_was_before_tape_change);
1113            start_to_read_from_next_tape();
1114            log_msg(4, "Started reading from next tape.");
1115            skip_incoming_files_until_we_find_this_one(temp_fname);
1116            log_msg(4, "Skipped irrelevant files OK.");
1117            for (size = orig_size; size > where_I_was_before_tape_change;
1118                 size -= bytes_to_write) {
1119                bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1120            }
1121            log_msg(4, "'size' is now %lld (should be %lld)", size,
1122                    where_I_was_before_tape_change);
1123            log_to_screen("Successfully re-sync'd tape");
1124            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1125        }
1126
1127        if (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
1128            // FIXME
1129        }
1130
1131#ifdef EXTRA_TAPE_CHECKSUMS
1132        for (i = 0; i < (int) bytes_to_write; i++) {
1133            ch = datablock[i];
1134            crc16 = updcrcr(crc16, (unsigned) ch);
1135            crctt = updcrc(crctt, (unsigned) ch);
1136        }
1137#endif
1138    }
1139    log_msg(6, "Total read from tape for this file = %lld",
1140            total_read_from_tape_for_this_file);
1141    log_msg(6, ".......................... Should be %lld", orig_size);
1142    g_tape_posK += total_read_from_tape_for_this_file / 1024;
1143    mr_asprintf(&actual_cksum, "%04x%04x", crc16, crctt);
1144    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
1145    } else {
1146        paranoid_fclose(fout);
1147    }
1148    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
1149    if (ctrl_chr != BLK_STOP_FILE) {
1150        wrong_marker(BLK_STOP_FILE, ctrl_chr);
1151    }
1152    if (strcmp(temp_cksum, actual_cksum)) {
1153        mr_asprintf(&tmp, "actual cksum=%s; recorded cksum=%s", actual_cksum,
1154                temp_cksum);
1155        log_to_screen(tmp);
1156        mr_free(tmp);
1157
1158        mr_asprintf(&tmp, "%s (%ld K) is corrupt on tape", temp_fname,
1159                (long) orig_size >> 10);
1160        log_to_screen(tmp);
1161        mr_free(tmp);
1162
1163        retval++;
1164    }
1165    mr_free(actual_cksum);
1166
1167    paranoid_free(datablock);
1168    paranoid_free(temp_fname);
1169    paranoid_free(temp_cksum);
1170    return (retval);
1171}
1172
1173
1174
1175/**
1176 * Read a header block from the currently opened stream (CD or tape).
1177 * This block indicates the length of the following file (if it's file-related)
1178 * the filename (if it's file-related), and the block type.
1179 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
1180 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
1181 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
1182 * @return 0 for success, nonzero for failure.
1183 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
1184 */
1185int
1186read_header_block_from_stream(long long *plen, char *filename,
1187                              int *pcontrol_char)
1188{
1189
1190    /*@ buffers ***************************************************** */
1191    char *tempblock;
1192
1193    /*@ int ********************************************************* */
1194    int i, retval;
1195
1196    /*@ end vars *************************************************** */
1197
1198    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
1199
1200    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1201        tempblock[i] = 0;
1202    }
1203    while (!(*pcontrol_char = tempblock[7000])) {
1204        g_tape_posK += fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream) / 1024;
1205    }
1206/*  memcpy((char*)plength_of_incoming_file,(char*)tempblock+7001,sizeof(long long)); */
1207/*  for(*plen=0,i=7;i>=0;i--) {*plen<<=8; *plen |= tempblock[7001+i];} */
1208    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1209    if (strcmp(tempblock + 6000 + *pcontrol_char, STR_HEADER)) {
1210        log_it("Bad header block at %ld K", (long) g_tape_posK);
1211    }
1212    strcpy(filename, tempblock + 1000);
1213/*  strcpy(cksum,tempblock+5555);*/
1214/*  log_it( "%s  (reading) fname=%s, filesize=%ld K",
1215       marker_to_string (*pcontrol_char), filename,
1216       (long) ((*plen) >> 10));
1217*/
1218    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1219        log_to_screen("I can't verify an aborted backup.");
1220        retval = 1;
1221    } else {
1222        retval = 0;
1223    }
1224    for (i = 1000; i < 1020; i++) {
1225        if (tempblock[i] < 32 || tempblock[i] > 126) {
1226            tempblock[i] = ' ';
1227        }
1228    }
1229    tempblock[i] = '\0';
1230    log_msg(6, "%s (fname=%s, size=%ld K)",
1231            marker_to_string(*pcontrol_char), tempblock + 1000,
1232            (long) (*plen) >> 10);
1233    paranoid_free(tempblock);
1234    return (retval);
1235}
1236
1237
1238
1239/**
1240 * Add specified file/slice to the internal catalog of all archives written.
1241 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1242 * write the last [buffer size] MB from the catalog to the new tape, so we know
1243 * we have @e all archives on some CD/tape/whatever.
1244 * @param type The type of file we're cataloging (afioball, slice, something else)
1245 * @param number The fileset number or biggiefile number.
1246 * @param aux The slice number if it's a biggiefile, or any other additional info.
1247 * @param fn The original full pathname of the file we're recording.
1248 * @return The index of the record we just added.
1249 */
1250int register_in_tape_catalog(t_archtype type, int number, long aux,
1251                             char *fn)
1252{
1253    int last;
1254    char fname[MAX_TAPECAT_FNAME_LEN+1];
1255    char *p;
1256
1257    p = strrchr(fn, '/');
1258    if (p) {
1259        p++;
1260    } else {
1261        p = fn;
1262    }
1263    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1264    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1265    last = g_tapecatalog->entries;
1266    if (last >= MAX_TAPECATALOG_ENTRIES) {
1267        log_it
1268            ("Warning - can't log #%d in tape catalog - too many entries already",
1269             number);
1270        return (-1);
1271    }
1272    g_tapecatalog->el[last].type = type;
1273    g_tapecatalog->el[last].number = number;
1274    g_tapecatalog->el[last].aux = aux;
1275    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1276    strcpy(g_tapecatalog->el[last].fname, fname);
1277    g_tapecatalog->entries++;
1278    return (last);              // returns the index of the record we've jsut added
1279}
1280
1281
1282
1283
1284/**
1285 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1286 * (got SIGPIPE) or look like we will.
1287 * @param mediasize The size of the tape in megabytes.
1288 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1289 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1290 * autodetecting the size. Huh?
1291 */
1292
1293/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1294bool
1295should_we_write_to_next_tape(long mediasize,
1296                             off_t length_of_incoming_file)
1297{
1298    /*@ bool's ***************************************************** */
1299    bool we_need_a_new_tape = FALSE;
1300
1301    /*@ end vars *************************************************** */
1302
1303    if (mediasize == 0) {
1304        return (FALSE);
1305    }
1306    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1307        log_it("mediasize = %ld", mediasize);
1308        we_need_a_new_tape = TRUE;
1309        log_to_screen("Should have started a new tape/CD already");
1310    }
1311    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1312        mediasize - (SLICE_SIZE * 4 / 1024)) {
1313        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1314               mediasize);
1315        we_need_a_new_tape = TRUE;
1316    }
1317    return (we_need_a_new_tape);
1318}
1319
1320
1321/**
1322 * Seek through the stream until we find a header block where the NAME field matches
1323 * @p the_file_I_was_reading. This is useful if you've just started reading from
1324 * a new tape and want to find the file you were reading when the tape ended.
1325 * @param the_file_I_was_reading File name to look for.
1326 * @return 0 for success, nonzero for failure.
1327 */
1328int skip_incoming_files_until_we_find_this_one(char
1329                                               *the_file_I_was_reading)
1330{
1331    char *pA;
1332    char *pB;
1333    int res;
1334    int ctrl_chr;
1335    char *temp_fname;
1336    char *datablock;
1337    long long temp_size, size;
1338    long bytes_to_write;
1339
1340    datablock = malloc(TAPE_BLOCK_SIZE);
1341    malloc_string(temp_fname);
1342    pB = strrchr(the_file_I_was_reading, '/');
1343    if (pB) {
1344        pB++;
1345    } else {
1346        pB = the_file_I_was_reading;
1347    }
1348    log_msg(1, "skip_incoming_..(%s)", pB);
1349    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1350    ctrl_chr = -1;
1351    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1352        res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1353        if (res) {
1354            // FIXME
1355        }
1356        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1357            break;
1358        }
1359        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1360        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1361        log_msg(3, "Still trying to re-sync w/ tape");
1362    }
1363    while (ctrl_chr != BLK_START_FILE) {
1364        res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1365        if (ctrl_chr == BLK_START_FILE) {
1366            break;
1367        }
1368        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1369        wrong_marker(BLK_START_FILE, ctrl_chr);
1370        log_msg(3, "Still trying to re-sync w/ tape");
1371    }
1372    pA = strrchr(temp_fname, '/');
1373    if (pA) {
1374        pA++;
1375    } else {
1376        pA = temp_fname;
1377    }
1378    pB = strrchr(the_file_I_was_reading, '/');
1379    if (pB) {
1380        pB++;
1381    } else {
1382        pB = the_file_I_was_reading;
1383    }
1384    while (strcmp(pA, pB)) {
1385        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1386                the_file_I_was_reading);
1387        for (size = temp_size; size > 0; size -= bytes_to_write) {
1388            bytes_to_write =
1389                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1390            if (fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream)) {
1391                // FIXME - needs error-checking and -catching
1392            }
1393        }
1394        res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1395        if (ctrl_chr != BLK_STOP_FILE) {
1396            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1397        }
1398        res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1399        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1400            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1401        }
1402        res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1403        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1404            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1405        }
1406        res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1407        if (ctrl_chr != BLK_START_FILE) {
1408            wrong_marker(BLK_START_FILE, ctrl_chr);
1409        }
1410        pA = strrchr(temp_fname, '/');
1411        if (pA) {
1412            pA++;
1413        } else {
1414            pA = temp_fname;
1415        }
1416        pB = strrchr(the_file_I_was_reading, '/');
1417        if (pB) {
1418            pB++;
1419        } else {
1420            pB = the_file_I_was_reading;
1421        }
1422    }
1423    log_msg(2, "Reading %s (it matches %s)", temp_fname,
1424            the_file_I_was_reading);
1425    paranoid_free(temp_fname);
1426    paranoid_free(datablock);
1427    return (0);
1428}
1429
1430
1431/**
1432 * Start to read from the next tape. Assumes the user has already inserted it.
1433 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1434 * @return 0 for success, nonzero for failure.
1435 */
1436int start_to_read_from_next_tape()
1437{
1438    /*@ int ********************************************************* */
1439    int res = 0;
1440    char *sz_msg;
1441    int ctrlchr;
1442    long long temp_size;
1443    malloc_string(sz_msg);
1444    /*@ end vars *************************************************** */
1445
1446    paranoid_pclose(g_tape_stream);
1447    sync();
1448    sync();
1449    sync();
1450    log_it("Next tape requested.");
1451    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1452    log_it("Opening IN the next tape");
1453    if (!
1454        (g_tape_stream =
1455         open_device_via_buffer(bkpinfo->media_device, 'r',
1456                                bkpinfo->internal_tape_block_size))) {
1457        log_OS_error(g_tape_fifo);
1458        log_to_screen("Cannot openin stream device");
1459        return (1);
1460    }
1461    g_tape_posK = 0;
1462    g_sigpipe = FALSE;
1463    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1464    if (ctrlchr != BLK_START_OF_TAPE) {
1465        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1466    }
1467    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1468    if (ctrlchr != BLK_START_OF_BACKUP) {
1469        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1470    } else {
1471        log_msg(3, "Next tape opened OK. Whoopee!");
1472    }
1473    paranoid_free(sz_msg);
1474    return (res);
1475}
1476
1477
1478
1479/**
1480 * Start to write to the next tape. Assume the user has already inserted it.
1481 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1482 * @return 0 for success, nonzero for failure.
1483 */
1484int start_to_write_to_next_tape()
1485{
1486    int res = 0;
1487    char *command = NULL;
1488
1489    paranoid_pclose(g_tape_stream);
1490    paranoid_system("sync");
1491    paranoid_system("sync");
1492    paranoid_system("sync");
1493    log_it("New tape requested.");
1494    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1495    if (g_current_media_number > MAX_NOOF_MEDIA) {
1496        res++;
1497        log_to_screen("Too many tapes. Man, you need to use nfs!");
1498    }
1499    if (bkpinfo->backup_media_type == cdstream) {
1500        mr_asprintf(&command,
1501                "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s",
1502                bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE,
1503                MONDO_LOGFILE);
1504        log_it("Opening OUT to next CD with the command");
1505        log_it(command);
1506        log_it("Let's see what happens, shall we?");
1507        g_tape_stream = popen(command, "w");
1508        mr_free(command);
1509
1510        if (!g_tape_stream) {
1511            log_to_screen("Failed to openout to cdstream (fifo)");
1512            return (1);
1513        }
1514    } else {
1515        log_it("Opening OUT to next tape");
1516        if (!
1517            (g_tape_stream =
1518             open_device_via_buffer(bkpinfo->media_device, 'w',
1519                                    bkpinfo->internal_tape_block_size))) {
1520            log_OS_error(g_tape_fifo);
1521            log_to_screen("Cannot openin stream device");
1522            return (1);
1523        }
1524    }
1525    g_tape_posK = 0;
1526    g_sigpipe = FALSE;
1527    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1528    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1529    return (res);
1530}
1531
1532
1533
1534
1535/**
1536 * Write a bufferfull of the most recent archives to the tape. The
1537 * rationale behind this is a bit complex. If the previous tape ended
1538 * suddenly (EOF or otherwise) some archives were probably left in the
1539 * buffer. That means that Mondo thinks they have been written, but
1540 * the external binary @c buffer has not actually written them. So to
1541 * be safe, we start the new tape by writing the last bufferfull from
1542 * the old one. This insures that all archives will be on at least
1543 * one tape. Sounds inelegant, but it works.
1544 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1545 * @return 0 for success, nonzero for failure.
1546 */
1547int write_backcatalog_to_tape()
1548{
1549    int i, last, res = 0;
1550    char *fname = NULL;
1551
1552    log_msg(2, "I am now writing back catalog to tape");
1553    last = g_tapecatalog->entries - 1;
1554    for (i = 0; i <= last; i++) {
1555        mr_asprintf(&fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir, g_tapecatalog->el[i].fname);
1556        if (!does_file_exist(fname)) {
1557            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1558        } else {
1559            write_header_block_to_stream(length_of_file(fname),
1560                                         "start-backcatalog-afio-or-slice",
1561                                         BLK_START_AN_AFIO_OR_SLICE);
1562            log_msg(2, "Writing %s", fname);
1563            if (write_file_to_stream_from_file(fname)) {
1564                res++;
1565                log_msg(2, "%s failed", fname);
1566            }
1567            if (i != last) {
1568                write_header_block_to_stream((off_t)0,
1569                                             "stop-backcatalog-afio-or-slice",
1570                                             BLK_STOP_AN_AFIO_OR_SLICE);
1571            }
1572        }
1573        mr_free(fname);
1574    }
1575    log_msg(2, "Finished writing back catalog to tape");
1576    return (res);
1577}
1578
1579
1580
1581/**
1582 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1583 * @param fname The path to all.tar.gz.
1584 * @return 0 for success, nonzero for failure.
1585 */
1586int write_data_disks_to_stream(char *fname)
1587{
1588    /*@ pointers *************************************************** */
1589    FILE *fin;
1590    char *tmp = NULL;
1591
1592    /*@ long ******************************************************* */
1593    long m = -1;
1594    long templong;
1595
1596    /*@ int ******************************************************** */
1597    int i, j;
1598
1599    /*@ buffers **************************************************** */
1600    char tempblock[256 * 1024];
1601
1602    /*@ end vars *************************************************** */
1603
1604    open_evalcall_form("Writing data disks to tape");
1605    log_to_screen("Writing data disks to tape");
1606    log_it("Data disks = %s", fname);
1607    if (!does_file_exist(fname)) {
1608        mr_asprintf(&tmp, "Cannot find %s", fname);
1609        log_to_screen(tmp);
1610        mr_free(tmp);
1611        return (1);
1612    }
1613    if (!(fin = fopen(fname, "r"))) {
1614        log_OS_error(fname);
1615        fatal_error("Cannot openin the data disk");
1616    }
1617    for (i = 0; i < 32; i++) {  /* 32MB */
1618        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1619            if (!feof(fin)) {
1620                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1621            } else {
1622                m = 0;
1623            }
1624            for (; m < 256 * 1024; m++) {
1625                tempblock[m] = '\0';
1626            }
1627            g_tape_posK +=
1628                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1629        }
1630        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1631        {
1632            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1633            update_evalcall_form((int) (templong));
1634        }
1635    }
1636    paranoid_fclose(fin);
1637    close_evalcall_form();
1638    return (0);
1639}
1640
1641
1642
1643
1644/**
1645 * Copy @p infile to the opened stream (CD or tape).
1646 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1647 * @param infile The file to write to the stream.
1648 * @return 0 for success, nonzero for failure.
1649 */
1650int write_file_to_stream_from_file(char *infile)
1651{
1652    /*@ buffers **************************************************** */
1653    char *tmp = NULL;
1654    char datablock[TAPE_BLOCK_SIZE];
1655    char *checksum = NULL;
1656    char *infile_basename;
1657
1658    /*@ int ******************************************************** */
1659    int retval = 0;
1660    int noof_blocks;
1661
1662    /*  unsigned int ch; */
1663    unsigned int crc16;
1664    unsigned int crctt;
1665
1666    /*@ pointers *************************************************** */
1667    FILE *fin;
1668    char *p;
1669
1670    /*@ long ******************************************************* */
1671    long bytes_to_read = 0;
1672    long i;
1673
1674    off_t filesize;
1675
1676#ifdef EXTRA_TAPE_CHECKSUMS
1677    int ch;
1678#endif
1679
1680    /*@ initialize ************************************************ */
1681    crc16 = 0;
1682    crctt = 0;
1683
1684
1685
1686    /*@ end vars *************************************************** */
1687
1688    infile_basename = strrchr(infile, '/');
1689    if (infile_basename) {
1690        infile_basename++;
1691    } else {
1692        infile_basename = infile;
1693    }
1694    filesize = length_of_file(infile);
1695    if (should_we_write_to_next_tape
1696        (bkpinfo->media_size[g_current_media_number], filesize)) {
1697        start_to_write_to_next_tape();
1698        write_backcatalog_to_tape();
1699    }
1700    p = strrchr(infile, '/');
1701    if (!p) {
1702        p = infile;
1703    } else {
1704        p++;
1705    }
1706    mr_asprintf(&tmp, "Writing file '%s' to tape (%ld KB)", p,
1707            (long) filesize >> 10);
1708    log_it(tmp);
1709    mr_free(tmp);
1710    write_header_block_to_stream(filesize, infile_basename,
1711                                 BLK_START_FILE);
1712//go_here_to_restart_saving_of_file:
1713    if (!(fin = fopen(infile, "r"))) {
1714        log_OS_error(infile);
1715        return (1);
1716    }
1717    for (noof_blocks = 0; filesize > 0;
1718         noof_blocks++, filesize -= bytes_to_read) {
1719        if (filesize < TAPE_BLOCK_SIZE) {
1720            bytes_to_read = (long) filesize;
1721            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1722                datablock[i] = '\0';
1723            }
1724        } else {
1725            bytes_to_read = TAPE_BLOCK_SIZE;
1726        }
1727        if (fread(datablock, 1, (size_t) bytes_to_read, fin)) {
1728            // FIXME
1729        }
1730        g_tape_posK +=
1731            fwrite(datablock, 1, /*bytes_to_read */ 
1732                   (size_t) TAPE_BLOCK_SIZE,
1733                   g_tape_stream) / 1024;
1734        if (g_sigpipe) {
1735            log_it("Sigpipe occurred recently. I'll start a new tape.");
1736            fclose(fin);
1737            g_sigpipe = FALSE;
1738            start_to_write_to_next_tape();
1739            write_backcatalog_to_tape();    // kinda-sorta recursive :)
1740            return (0);
1741        }
1742#ifdef EXTRA_TAPE_CHECKSUMS
1743        for (i = 0; i < bytes_to_read; i++) {
1744            ch = datablock[i];
1745            crc16 = updcrcr(crc16, (unsigned) ch);
1746            crctt = updcrc(crctt, (unsigned) ch);
1747        }
1748#endif
1749    }
1750    paranoid_fclose(fin);
1751    mr_asprintf(&checksum, "%04x%04x", crc16, crctt);
1752    /* BERLIOS: what does it do ??? */
1753    write_header_block_to_stream((off_t)g_current_media_number, checksum, BLK_STOP_FILE);
1754    mr_free(checksum);
1755
1756//  log_it("File '%s' written to tape.", infile);
1757    return (retval);
1758}
1759
1760
1761
1762
1763
1764/**
1765 * Write a header block to the opened stream (CD or tape).
1766 * @param length_of_incoming_file The length to store in the header block.
1767 * Usually matters only if this is a file-related header, in which case it should
1768 * be the length of the file that will follow.
1769 * @param filename The filename to store in the header block. Usually matters
1770 * only if this is a file-related header, in which case this should be the name
1771 * if the file that will follow.
1772 * @param control_char The type of header block this is (start-file, end-file, start-tape, ...)
1773 * @return 0 for success, nonzero for failure.
1774 */
1775int
1776write_header_block_to_stream(off_t length_of_incoming_file,
1777                             char *filename, int control_char)
1778{
1779    /*@ buffers **************************************************** */
1780    char tempblock[TAPE_BLOCK_SIZE];
1781    char *tmp = NULL;
1782    char *p;
1783
1784    /*@ int ******************************************************** */
1785    int i;
1786
1787    off_t olen;
1788
1789    /*@ end vars *************************************************** */
1790
1791
1792    olen = length_of_incoming_file;
1793    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1794    if (!p) {
1795        p = filename;
1796    } else {
1797        p++;
1798    }
1799    if (!g_tape_stream) {
1800        log_to_screen
1801            ("You're not backing up to tape. Why write a tape header?");
1802        return (1);
1803    }
1804    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1805        tempblock[i] = 0;
1806    }
1807    sprintf(tempblock + 6000 + control_char, STR_HEADER);
1808    tempblock[7000] = control_char;
1809    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1810    strcpy(tempblock + 1000, filename);
1811    g_tape_posK +=
1812        fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1813               g_tape_stream) / 1024;
1814    mr_asprintf(&tmp, "%s (fname=%s, size=%ld K)",
1815            marker_to_string(control_char), p,
1816            (long) length_of_incoming_file >> 10);
1817    log_msg(6, tmp);
1818    mr_free(tmp);
1819    return (0);
1820}
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831/**
1832 * Log (to screen) an erroneous marker, along with what it should have been.
1833 * @param should_be What we were expecting.
1834 * @param it_is What we got.
1835 */
1836void wrong_marker(int should_be, int it_is)
1837{
1838    /*@ buffer ***************************************************** */
1839    char *tmp = NULL;
1840
1841
1842    /*@ end vars *************************************************** */
1843    mr_asprintf(&tmp, "Wrong marker! (Should be %s, is actually %s)", marker_to_string(should_be), marker_to_string(it_is));
1844    log_to_screen(tmp);
1845    mr_free(tmp);
1846}
1847
1848/* @} - end of streamGroup */
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