source: MondoRescue/branches/2.2.10/mondo/src/common/libmondo-stream.c @ 2331

Last change on this file since 2331 was 2331, checked in by Bruno Cornec, 11 years ago

r3342@localhost: bruno | 2009-08-14 00:46:51 +0200

  • Another round of strcpy suppressions
  • find_home_of_exe() now allocates memory which has to be freed by the caller
  • Supress useless sz_last_suffix()
  • mr_getline now has the same interface as the other mr_mem functions
  • valgrind and compiler warnings fixes
  • Property svn:keywords set to Id
File size: 50.8 KB
Line 
1/* libmondo-stream.c
2   $Id: libmondo-stream.c 2331 2009-08-18 13:25:29Z 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 2331 2009-08-18 13:25:29Z bruno $";
32extern bool g_sigpipe;
33extern int g_tape_buffer_size_MB;
34
35extern char *g_getfacl;
36extern char *g_getfattr;
37extern char *MONDO_LOGFILE;
38
39/* Reference to global bkpinfo */
40extern struct s_bkpinfo *bkpinfo;
41
42/**
43 * @addtogroup globalGroup
44 * @{
45 */
46/**
47 * The file pointer for the opened tape/CD stream.
48 * Opened and closed by openin_tape(), openin_cdstream(),
49 * openout_tape(), openout_cdstream(), closein_tape(), closein_cdstream(),
50 * closeout_tape(), and closeout_cdstream().
51 */
52FILE *g_tape_stream = NULL;
53
54
55/**
56 * The position (in kilobytes) where we are on the tape.
57 */
58long long g_tape_posK = 0;
59
60/**
61 * The current media number we're using. This value is 1-based.
62 */
63int g_current_media_number = -1;
64
65/**
66 * The tape catalog that keeps track of files written to tape.
67 */
68struct s_tapecatalog *g_tapecatalog;
69
70/* @} - end of globalGroup */
71
72int write_backcatalog_to_tape();
73
74
75
76
77
78/**
79 * @addtogroup streamGroup
80 * @{
81 */
82/**
83 * Close the global output file descriptor which Mondo has used to read
84 * from the CD stream.
85 * @param bkpinfo The backup information structure. Passed directly to closein_tape().
86 * @return 0 for success, nonzero for failure.
87 * @note This should be called by restore processes only.
88 */
89int closein_cdstream()
90{
91    return (closein_tape());
92}
93
94
95/**
96 * Close the global output file descriptor which Mondo has used to read
97 * from buffer or dd, which read from the tape.
98 * @param bkpinfo The backup information structure. Unused.
99 * @return 0 for success, nonzero for failure.
100 * @note This should be called by restore processes only.
101 * @note This function also works for cdstreams for now, but don't count on this behavior.
102 * @bug @p bkpinfo parameter is unused.
103 */
104int closein_tape()
105{
106    /*@ int's ******************************************************* */
107    int retval = 0;
108    int res = 0;
109    int ctrl_chr = '\0';
110
111    /*@ buffers ***************************************************** */
112    char fname[MAX_STR_LEN];
113
114    /*@ long long's ************************************************* */
115    long long size;
116    char *blk;
117    int i;
118
119    blk = (char *) malloc(256 * 1024);
120
121    log_it("closein_tape() -- entering");
122    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
123    retval += res;
124    if (ctrl_chr != BLK_END_OF_BACKUP) {
125        wrong_marker(BLK_END_OF_BACKUP, ctrl_chr);
126    }
127    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
128    retval += res;
129    if (ctrl_chr != BLK_END_OF_TAPE) {
130        wrong_marker(BLK_END_OF_TAPE, ctrl_chr);
131    }
132    for (i = 0; i < 8 && !feof(g_tape_stream); i++) {
133        (void) fread(blk, 1, 256 * 1024, g_tape_stream);
134    }
135    sleep(1);
136    paranoid_system("sync");
137    sleep(1);
138    paranoid_pclose(g_tape_stream);
139    log_it("closein_tape() -- leaving");
140    if (!bkpinfo->please_dont_eject) {
141        eject_device(bkpinfo->media_device);
142    }
143    paranoid_free(blk);
144    paranoid_free(g_tapecatalog);
145    return (retval);
146}
147
148
149
150/**
151 * Close the global output file descriptor which Mondo has been using to write
152 * to the tape device (via buffer or dd).
153 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
154 * @return 0 for success, nonzero for failure.
155 * @note This should be called by backup processes only.
156 */
157int closeout_tape()
158{
159    /*@ int's ******************************************************* */
160    int retval = 0;
161//  int res = 0;
162//  int ctrl_chr = '\0';
163
164    /*@ buffers ***************************************************** */
165//  char fname[MAX_STR_LEN];
166
167    /*@ long long's ************************************************* */
168//  long long size;
169    int i;
170    char *blk;
171
172    blk = (char *) malloc(256 * 1024);
173
174    sleep(1);
175    paranoid_system("sync");
176    sleep(1);
177    log_it("closeout_tape() -- entering");
178    retval +=
179        write_header_block_to_stream((off_t)0, "end-of-backup",
180                                     BLK_END_OF_BACKUP);
181    retval += write_header_block_to_stream((off_t)0, "end-of-tape", BLK_END_OF_TAPE);   /* just in case */
182/* write 1MB of crap */
183    for (i = 0; i < 256 * 1024; i++) {
184        blk[i] = (int) (random() & 0xFF);
185    }
186    for (i = 0; i < 4 * 8; i++) {
187        (void) fwrite(blk, 1, 256 * 1024, g_tape_stream);
188        if (should_we_write_to_next_tape
189            (bkpinfo->media_size[g_current_media_number], (off_t)256 * 1024)) {
190            start_to_write_to_next_tape();
191        }
192    }
193/* write 1MB of zeroes */
194/*
195    for (i = 0; i < 256*1024; i++)
196      {
197        blk[i] = 0;
198      }
199    for (i = 0; i < 4; i++)
200      {
201        fwrite (blk, 1, 256*1024, g_tape_stream);
202        if (should_we_write_to_next_tape (bkpinfo->media_size[g_current_media_number], 256*1024))
203          {
204            start_to_write_to_next_tape ();
205          }
206      }
207*/
208    sleep(2);
209    paranoid_pclose(g_tape_stream);
210    log_it("closeout_tape() -- leaving");
211    for (i = 0; i < g_tapecatalog->entries; i++) {
212        log_it("i=%d type=%s num=%d aux=%ld posK=%lld", i,
213               (g_tapecatalog->el[i].type ==
214                fileset) ? "fileset" : "bigslice",
215               g_tapecatalog->el[i].number, g_tapecatalog->el[i].aux,
216               g_tapecatalog->el[i].tape_posK);
217    }
218    paranoid_free(blk);
219    paranoid_free(g_tapecatalog);
220    return (retval);
221}
222
223
224
225bool mt_says_tape_exists(char *dev)
226{
227    char *command = NULL;
228    int res;
229
230    mr_asprintf(command, "mt -f %s status", dev);
231    res = run_program_and_log_output(command, 1);
232    mr_free(command);
233
234    if (res) {
235        return (FALSE);
236    } else {
237        return (TRUE);
238    }
239}
240
241
242
243/**
244 * Determine the name of the tape device. Tries the SCSI tape for
245 * this platform, then the IDE tape, then "/dev/st0", then "/dev/osst0".
246 * @return the allocated tape string if success, NULL if failure
247 */
248char *mr_find_tape_device(void)
249{
250    char *tmp = NULL;
251    char *command = NULL;
252    char *cdr_exe = NULL;
253    char *dev = NULL;
254    int res;
255    char *dev = NULL;
256
257    log_to_screen("I am looking for your tape streamer. Please wait.");
258    tmp = find_home_of_exe("cdrecord");
259    if (tmp) {
260        mr_asprintf(cdr_exe, "cdrecord");
261    } else {
262        mr_asprintf(cdr_exe, "dvdrecord");
263    }
264    mr_free(tmp);
265
266    mr_asprintf(command, "%s -scanbus 2> /dev/null | grep -i tape | wc -l", cdr_exe);
267    mr_asprintf(tmp, "%s", call_program_and_get_last_line_of_output(command));
268    mr_free(command);
269
270    if (atoi(tmp) != 1) {
271        log_it("Either too few or too many tape streamers for me to detect...");
272        mr_asprintf(&dev, "%s", VANILLA_SCSI_TAPE);
273        mr_free(tmp);
274        mr_free(tmp);
275        return(dev);
276    }
277    mr_free(tmp);
278
279    mr_asprintf(command, "%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", cdr_exe);
280    mr_asprintf(tmp, "%s", call_program_and_get_last_line_of_output(command));
281    mr_free(command);
282
283    if (strlen(tmp) < 2) {
284        log_it("Could not find tape device");
285        mr_free(tmp);
286        return(NULL);
287    }
288    mr_free(tmp);
289
290    mr_asprintf(command, "%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", cdr_exe);
291    mr_free(cdr_exe);
292
293    mr_asprintf(tmp, "%s", call_program_and_get_last_line_of_output(command));
294    mr_free(command);
295
296    mr_asprintf(dev, "%s", "/dev/st");
297    mr_strcat(dev, tmp);            // e.g. '/dev/st0' becomes '/dev/stN'
298    mr_free(tmp);
299
300    res = 0;
301    if (!mt_says_tape_exists(dev)) {
302        mr_free(dev);
303        mr_asprintf(&dev, "%s", ALT_TAPE);
304        if (!mt_says_tape_exists(dev)) {
305            log_it("Cannot openin %s", dev);
306            mr_free(dev);
307            mr_asprintf(&dev, "/dev/st0");
308            if (!mt_says_tape_exists(dev)) {
309                log_it("Cannot openin %s", dev);
310                mr_free(dev);
311                mr_asprintf(&dev, "/dev/osst0");
312                if (!mt_says_tape_exists(dev)) {
313                    mr_free(dev);
314                    res++;
315                } else {
316                    res = 0;
317                }
318            }
319        }
320    }
321
322    if (dev) {
323        log_it("At this point, dev = %s and res = %d", dev, res);
324    } else {
325        log_it("At this point, dev is NULL and res = %d", dev, res);
326    }
327
328    mr_asprintf(tmp, "%s", call_program_and_get_last_line_of_output(" cdrecord -scanbus 2> /dev/null | tr -s '\t' ' ' |  grep \"[0-9]*,[0-9]*,[0-9]*\" | grep -v \"[0-9]*) \\*\" | grep -i TAPE |  awk '{for(i=1; i<NF; i++) { if (index($i, \"GB\")>0) { print $i;};};};'"));
329
330    if (mt_says_tape_exists(dev)) {
331        res = 0;
332    } else {
333        log_it("Turning %s", dev);
334        mr_free(tmp);
335        mr_asprintf(tmp, "%s", (strrchr(dev, '/') != NULL) ? strrchr(dev, '/') : dev);
336        mr_free(dev);
337        mr_asprintf(&dev, "/dev/os%s", tmp);
338        log_it("...into %s", dev);
339        if (mt_says_tape_exists(dev)) {
340            res = 0;
341        } else {
342            mr_free(dev);
343            res++;
344        }
345    }
346
347    log_it("res=%d; dev=%s", res, dev);
348
349    if (dev) {
350        log_it("At this new point, dev = %s and res = %d", dev, res);
351    } else {
352        log_it("At this new point, dev is NULL and res = %d", dev, res);
353        mr_free(tmp);
354        return(NULL);
355    }
356
357    if (strlen(tmp) < 2) {
358        log_it("Warning - size of tape unknown");
359    }
360    mr_free(tmp);
361    return(dev);
362}
363
364
365int read_EXAT_files_from_tape(long long *ptmp_size, char *tmp_fname,
366                              int *pctrl_chr, char *xattr_fname,
367                              char *acl_fname)
368{
369    int res = 0;
370    char *fname = (char *)&res;                 /* Should NOT be NULL */
371    char *tmp = NULL;
372
373    // xattr
374    if (g_getfattr) {
375        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
376        if (*pctrl_chr != BLK_START_EXAT_FILE) {
377            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
378        }
379        if (strstr(fname, "xattr") == NULL) {
380            mr_asprintf(tmp,"Wrong order expected xattr, got %s, sunshine.", fname);
381            fatal_error(tmp);
382        }
383        read_file_from_stream_to_file(xattr_fname, *ptmp_size);
384        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
385        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
386            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
387        }
388        log_msg(1, "Got xattr");
389        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
390        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
391            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
392        }
393        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
394        if (*pctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
395            log_msg(1, "No acl attributes found, skipping to afio files");
396            return(0);
397        } else {
398            if (*pctrl_chr != BLK_START_EXTENDED_ATTRIBUTES) {
399                wrong_marker(BLK_START_EXTENDED_ATTRIBUTES, *pctrl_chr);
400            }
401        }
402    }
403    // acl
404    if (g_getfacl) {
405        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
406        if (*pctrl_chr != BLK_START_EXAT_FILE) {
407            wrong_marker(BLK_START_EXAT_FILE, *pctrl_chr);
408        }
409        if (strstr(fname, "acl") == NULL) {
410            mr_asprintf(tmp,"Wrong order expected acl, got %s, sunshine.", fname);
411            fatal_error(tmp);
412        }
413        read_file_from_stream_to_file(acl_fname, *ptmp_size);
414        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
415        if (*pctrl_chr != BLK_STOP_EXAT_FILE) {
416            wrong_marker(BLK_STOP_EXAT_FILE, *pctrl_chr);
417        }
418        res = read_header_block_from_stream(ptmp_size, fname, pctrl_chr);
419        if (*pctrl_chr != BLK_STOP_EXTENDED_ATTRIBUTES) {
420            wrong_marker(BLK_STOP_EXTENDED_ATTRIBUTES, *pctrl_chr);
421        }
422        log_msg(1, "Got acl");
423    }
424    // tarball itself
425    res = read_header_block_from_stream(ptmp_size, tmp_fname, pctrl_chr);
426    log_msg(1, "End of extended attributes, now looking for afioball");
427    return (0);
428}
429
430
431int write_EXAT_files_to_tape(char *xattr_fname,
432                             char *acl_fname)
433{
434    int res = 0;
435    if (g_getfattr) {
436    // xattr
437        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
438                             BLK_START_EXTENDED_ATTRIBUTES);
439        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
440                             BLK_START_EXAT_FILE);
441        write_file_to_stream_from_file(xattr_fname);
442        write_header_block_to_stream((off_t)-1, xattr_fname, BLK_STOP_EXAT_FILE);
443        write_header_block_to_stream(length_of_file(xattr_fname), xattr_fname,
444                             BLK_STOP_EXTENDED_ATTRIBUTES);
445    }
446    if (g_getfacl) {
447    // acl
448        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
449                             BLK_START_EXTENDED_ATTRIBUTES);
450        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
451                             BLK_START_EXAT_FILE);
452        write_file_to_stream_from_file(acl_fname);
453        write_header_block_to_stream((off_t)-1, acl_fname, BLK_STOP_EXAT_FILE);
454        write_header_block_to_stream(length_of_file(acl_fname), acl_fname,
455                             BLK_STOP_EXTENDED_ATTRIBUTES);
456    }
457    return (res);
458}
459
460
461
462
463/**
464 * Tell the user to insert tape @p tapeno and wait for it to settle (5 seconds).
465 * @param tapeno The tape number to insist on.
466 * @bug There is currently no way to actually verify that the user has actually
467 * inserted the right tape.
468 */
469void insist_on_this_tape_number(int tapeno)
470{
471    int i;
472    char *tmp = NULL;
473
474    log_it("Insisting on tape #%d", tapeno);
475    if (g_current_media_number != tapeno) {
476        mr_asprintf(tmp, "When the tape drive goes quiet, please insert volume %d in this series.", tapeno);
477        popup_and_OK(tmp);
478        mr_free(tmp);
479        open_evalcall_form("Waiting while the tape drive settles");
480    } else {
481        open_evalcall_form("Waiting while the tape drive rewinds");
482    }
483
484    for (i = 0; i <= 100; i += 2) {
485        usleep(100000);
486        update_evalcall_form(i);
487    }
488    close_evalcall_form();
489    log_it("I assume user has inserted it. They _say_ they have...");
490    g_current_media_number = tapeno;
491
492    //  log_it("g_current_media_number = %d", g_current_media_number);
493    log_it("OK, I've finished insisting. On with the revelry.");
494}
495
496
497
498
499/**
500 * Debugging aid - log the offset we're at on the tape (reading or writing).
501 */
502void log_tape_pos(void)
503{
504    /*@ buffers ***************************************************** */
505
506
507    /*@ end vars *************************************************** */
508
509    log_it("Tape position -- %ld KB (%ld MB)", (long) g_tape_posK,
510           (long) g_tape_posK >> 10);
511}
512
513
514
515
516/**
517 * Add a file to a collection of recently archived filesets/slices.
518 * The type is determined by the filename: if it contains ".afio." it is
519 * assumed to be a fileset, otherwise if it contains "slice" it's a slice,
520 * otherwise we generate a fatal_error().
521 * @param latest_fname The file to place in the collection.
522 * @return 0, always.
523 * @bug Return value is redundant.
524 * @bug The detection won't work for uncompressed afioballs (they end in ".afio", no dot afterwards). // Not true. They end in '.' -Hugo
525 */
526int maintain_collection_of_recent_archives(char *latest_fname)
527{
528    long long final_alleged_writeK, final_projected_certain_writeK,
529        final_actually_certain_writeK = 0, cposK, bufsize_K;
530    int last, curr, i;
531    t_archtype type = other;
532    char *command = NULL;
533    char *tmpdir = NULL;
534    char *old_fname = NULL;
535    char *p;
536    char suffix[16];
537
538    bufsize_K = (long long) (1024LL * (1 + g_tape_buffer_size_MB));
539    if ((p = strrchr(latest_fname, '.'))) {
540        strcpy(suffix, ++p);
541    } else {
542        suffix[0] = '\0';
543    }
544    if (strstr(latest_fname, ".afio.") || strstr(latest_fname, ".star.")) {
545        type = fileset;
546    } else if (strstr(latest_fname, "slice")) {
547        type = biggieslice;
548    } else {
549        log_it("fname = %s", latest_fname);
550        fatal_error("Unknown type. Internal error in maintain_collection_of_recent_archives()");
551    }
552    mr_asprintf(tmpdir, "%s/tmpfs/backcatalog", bkpinfo->tmpdir);
553    mkdir(tmpdir, 0x700);
554    mr_asprintf(command, "cp -f %s %s", latest_fname, tmpdir);
555    if (run_program_and_log_output(command, 6)) {
556        log_it("Warning - failed to copy %s to backcatalog at %s",
557               latest_fname, tmpdir);
558    }
559    mr_free(command);
560
561    last = g_tapecatalog->entries - 1;
562    if (last <= 0) {
563        log_it("Too early to start deleting from collection.");
564        mr_free(tmpdir);
565        return (0);
566    }
567    final_alleged_writeK = g_tapecatalog->el[last].tape_posK;
568    final_projected_certain_writeK = final_alleged_writeK - bufsize_K;
569    for (curr = last; curr >= 0; curr--) {
570        cposK = g_tapecatalog->el[curr].tape_posK;
571        if (cposK < final_projected_certain_writeK) {
572            final_actually_certain_writeK = cposK;
573            break;
574        }
575    }
576    if (curr < 0) {
577        log_it("Not far enough into tape to start deleting old archives from collection.");
578        mr_free(tmpdir);
579        return (0);
580    }
581
582    for (i = curr - 1; i >= 0 && curr - i < 10; i--) {
583        mr_asprintf(old_fname, "%s/%s", tmpdir, g_tapecatalog->el[i].fname);
584        unlink(old_fname);
585        mr_free(old_fname);
586    }
587    mr_free(tmpdir);
588    return (0);
589}
590
591
592
593
594/**
595 * Open the CD stream for input.
596 * @param bkpinfo The backup information structure. Passed to openin_tape().
597 * @return 0 for success, nonzero for failure.
598 * @note Equivalent to openin_tape() for now, but don't count on this behavior.
599 */
600int openin_cdstream()
601{
602    return (openin_tape());
603}
604
605/**
606 * FIFO used to read/write to the tape device.
607 * @bug This seems obsolete now that we call an external @c buffer program. Please look onto this.
608 */
609char g_tape_fifo[MAX_STR_LEN];
610
611
612
613int set_tape_block_size_with_mt(long internal_tape_block_size)
614{
615    char *tmp = NULL;
616    int res;
617
618    if (bkpinfo->media_device == NULL) {
619        return(1);
620    }
621
622    if (strncmp(bkpinfo->media_device, "/dev/", 5)) {
623        log_msg(1, "Not using 'mt setblk'. This isn't an actual /dev entry.");
624        return (0);
625    }
626    mr_asprintf(tmp, "mt -f %s setblk %ld", bkpinfo->media_device, internal_tape_block_size);
627    res = run_program_and_log_output(tmp, 3);
628    mr_free(tmp);
629    return (res);
630}
631
632/**
633 * Return the non-rewinding device when passed the normal one
634 * @param tapedev The tape device to open for writing.
635 * @note the caller needs to free the string returned
636 */
637char *get_non_rewind_dev(char *tapedev)
638{
639
640    char *ntapedev = NULL;
641    char *p = NULL;
642    char *q = NULL;
643    char *r = NULL;
644
645    ntapedev = (char *)malloc(strlen(tapedev)+sizeof(char));
646    p = strrchr(tapedev,'/');
647    if (p == NULL) {
648        log_it("Didn't find a '/' in %s",tapedev);
649        return(NULL);
650    }
651
652    /* Copy tapedev content up to the last / */
653    q = tapedev;
654    r = ntapedev;
655    while (q != p) {
656        *r = *q;
657        r++;
658        q++;
659    }
660    /* Copy the '/' */
661    *r = *q;
662    r++;
663    q++;
664    /* Adds a 'n' - non-rewinding */
665    *r = 'n';
666    r++;
667    /* Copy the rest of tapedev */
668    while (*q != '\0') {
669        *r = *q;
670        r++;
671        q++;
672    }
673    *r = '\0';
674    if (mt_says_tape_exists(ntapedev)) {
675        log_it("Non-rewinding tape device is %s",ntapedev);
676    } else {
677        log_it("Unable to find non-rewinding tape device.");
678        ntapedev = NULL;
679    }
680    return(ntapedev);
681}
682
683
684
685/**
686 * Handle OBDR if we were asked to do so
687 * @param tapedev The tape device to open for reading.
688 */
689int skip_obdr(void)
690{
691    char *command = NULL;
692    int res = 0;
693
694    if (bkpinfo->media_device == NULL) {
695        return(1);
696    }
697
698    log_it("Skipping OBDR headers");
699    mr_asprintf(command, "mt -f %s rewind",bkpinfo->media_device);
700    res = run_program_and_log_output(command, 1);
701    paranoid_free(command);
702
703    mr_asprintf(command, "mt -f %s fsf 2",bkpinfo->media_device);
704    res = run_program_and_log_output(command, 1);
705    paranoid_free(command);
706
707    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
708    return(res);
709}
710
711/**
712 * Handle OBDR if we were asked to do so
713 * @param tapedev The tape device to open for writing.
714 * @return 0 for success, nonzero for failure.
715 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
716 * EXISTING DATA on the tape!
717 */
718int create_obdr(void)
719{
720
721    char *command = NULL;
722    int res = 0;
723
724    if (bkpinfo->media_device == NULL) {
725        return(1);
726    }
727
728    log_it("Creating OBDR headers");
729    /* OBDR: First block 10 kB of zero bs = 512 */
730    mr_asprintf(command, "mt -f %s compression off",bkpinfo->media_device);
731    res = run_program_and_log_output(command, 1);
732    paranoid_free(command);
733
734    mr_asprintf(command, "mt -f %s rewind",bkpinfo->media_device);
735    res += run_program_and_log_output(command, 1);
736    paranoid_free(command);
737
738    set_tape_block_size_with_mt(512);
739
740    mr_asprintf(command, "dd if=/dev/zero of=%s bs=512 count=20",bkpinfo->media_device);
741    res += run_program_and_log_output(command, 1);
742    paranoid_free(command);
743
744    /* OBDR: then ISO boot image bs = 2048 */
745    set_tape_block_size_with_mt(2048);
746
747    mr_asprintf(command, "dd if=%s of=%s bs=2048",MINDI_CACHE"/mondorescue.iso",bkpinfo->media_device);
748    res += run_program_and_log_output(command, 1);
749    paranoid_free(command);
750
751    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
752    return(res);
753}
754
755
756/**
757 * Open the tape device for input.
758 * @param bkpinfo The backup information structure. Fields used:
759 * - @c bkpinfo->media_device
760 * - @c bkpinfo->tmpdir
761 * @return 0 for success, nonzero for failure.
762 * @note This will also work with a cdstream for now, but don't count on this behavior.
763 */
764int openin_tape()
765{
766    /*@ buffer ***************************************************** */
767    char fname[MAX_STR_LEN];
768    char *datablock;
769    char *tmp = NULL;
770    char old_cwd[MAX_STR_LEN];
771    char *outfname = NULL;
772    /*@ int ******************************************************* */
773    int i;
774    int j;
775    int res = 0;
776    long length, templong;
777    size_t k;
778    int retval = 0;
779    int ctrl_chr;
780
781    /*@ long long ************************************************* */
782    long long size;
783
784    /*@ pointers ************************************************** */
785    FILE *fout;
786
787    /*@ end vars *************************************************** */
788
789    g_tapecatalog = mr_malloc(sizeof(struct s_tapecatalog));
790    g_tapecatalog->entries = 0;
791    g_tape_posK = 0;
792    if (g_tape_stream) {
793        log_it("FYI - I won't 'openin' the tape. It's already open.");
794        return (0);
795    }
796
797    // mondoarchive should have configured everything to give the right non-rew device
798    if ((bkpinfo->use_obdr) && (bkpinfo->media_device != NULL)) {
799        res = skip_obdr();
800        if (res != 0) {
801            log_it("Not able to skip OBDR - Restore will have to be done manually");
802        }
803    } else {
804        if (bkpinfo->media_device == NULL) {
805            log_it("Not able to skip OBDR - Restore will have to be done manually");
806            return (1);
807        }
808        set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
809    }
810
811    insist_on_this_tape_number(1);
812    mr_asprintf(outfname, "%s/tmp/all.tar.gz", bkpinfo->tmpdir);
813    make_hole_for_file(outfname);
814
815    log_it("Opening IN tape");
816    if (!(g_tape_stream = open_device_via_buffer(bkpinfo->media_device, 'r', bkpinfo->internal_tape_block_size))) {
817        log_OS_error(g_tape_fifo);
818        log_to_screen("Cannot openin stream device");
819        mr_free(outfname);
820        return (1);
821    }
822    log_to_screen("Reading stream");
823    log_it("stream device = '%s'", bkpinfo->media_device);
824/* skip data disks */
825    open_evalcall_form("Skipping data disks on stream");
826    log_to_screen("Skipping data disks on stream");
827    if (!(fout = fopen(outfname, "w"))) {
828        log_OS_error(outfname);
829        log_to_screen("Cannot openout datadisk all.tar.gz file");
830        mr_free(outfname);
831        return (-1);
832    }
833    if (!(datablock = (char *) malloc(256 * 1024))) {
834        log_to_screen("Unable to malloc 256*1024");
835        mr_free(outfname);
836        finish(1);
837    }
838    for (i = 0; i < 32; i++) {
839        for (j = 0; j < 4; j++) {
840            for (length = 0, k = 0; length < 256 * 1024; length += k) {
841                k = fread(datablock + length, 1, 256 * 1024 - length,
842                          g_tape_stream);
843            }
844            (void) fwrite(datablock, 1, (size_t) length, fout);
845            g_tape_posK += length / 1024;
846        }
847        if (i > 8)              // otherwise, 'buffer' distorts calculations
848        {
849            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
850            update_evalcall_form((int) (templong));
851        }
852    }
853    paranoid_fclose(fout);
854    paranoid_free(datablock);
855
856/* find initial blocks */
857    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
858    retval += res;
859    if (ctrl_chr != BLK_START_OF_TAPE) {
860        wrong_marker(BLK_START_OF_TAPE, ctrl_chr);
861    }
862    res = read_header_block_from_stream(&size, fname, &ctrl_chr);
863    retval += res;
864    if (ctrl_chr != BLK_START_OF_BACKUP) {
865        wrong_marker(BLK_START_OF_BACKUP, ctrl_chr);
866    }
867    close_evalcall_form();
868    log_it("Saved all.tar.gz to '%s'", outfname);
869    (void) getcwd(old_cwd, MAX_STR_LEN);
870    chdir(bkpinfo->tmpdir);
871    mr_asprintf(tmp, "tar -zxf %s ./tmp/mondo-restore.cfg 2> /dev/null", outfname);
872    paranoid_system(tmp);
873    mr_free(tmp);
874
875    paranoid_system("cp -f tmp/mondo-restore.cfg . 2> /dev/null");
876    chdir(old_cwd);
877    unlink(outfname);
878    mr_free(outfname);
879    return (retval);
880}
881
882
883/**
884 * Start writing to a CD stream.
885 * @param cddev The CD device to openout via cdrecord.
886 * @param speed The speed to write at.
887 * @return 0 for success, nonzero for failure.
888 * @note This should be called only from backup processes.
889 */
890int openout_cdstream(char *cddev, int speed)
891{
892    /*@ buffers ***************************************************** */
893    char *command = NULL;
894
895    /*@ end vars *************************************************** */
896
897    if (cddev == NULL) {
898        log_to_screen("Failed to openout NULL cddev");
899        return (1);
900    }
901    /*  add 'dummy' if testing */
902    mr_asprintf(command, "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s", cddev, speed, MONDO_LOGFILE, MONDO_LOGFILE);
903    /*  initialise the catalog */
904    g_current_media_number = 1;
905    if (!(g_tapecatalog = malloc(sizeof(struct s_tapecatalog)))) {
906        fatal_error("Cannot alloc mem for tape catalog");
907    }
908    g_tapecatalog->entries = 0;
909    /* log stuff */
910    log_it("Opening OUT cdstream with the command");
911    log_it(command);
912    /*  log_it("Let's see what happens, shall we?"); */
913    g_tape_stream = popen(command, "w");
914    mr_free(command);
915
916    if (g_tape_stream) {
917        return (0);
918    } else {
919        log_to_screen("Failed to openout to cdstream (fifo)");
920        return (1);
921    }
922}
923
924
925/**
926 * Start writing to a tape device for the backup.
927 * Handle OBDR if we were asked to do so
928 * @param tapedev The tape device to open for writing.
929 * @return 0 for success, nonzero for failure.
930 * @note This should be called ONLY from backup processes. It will OVERWRITE ANY
931 * EXISTING DATA on the tape!
932 */
933int openout_tape() {
934
935g_current_media_number = 1;
936if (g_tape_stream) {
937    log_it("FYI - I won't 'openout' the tape. It's already open.");
938    return (0);
939}
940if (bkpinfo->media_device == NULL) {
941    log_it("Unable to openout NULL dvice");
942    return(1);
943}
944g_tapecatalog = mr_malloc(sizeof(struct s_tapecatalog));
945g_tapecatalog->entries = 0;
946g_tape_posK = 0;
947
948if (bkpinfo->use_obdr) {
949    create_obdr();
950} else {
951    set_tape_block_size_with_mt(bkpinfo->internal_tape_block_size);
952}
953log_it("Opening OUT tape");
954if (!(g_tape_stream = open_device_via_buffer(bkpinfo->media_device, 'w', bkpinfo->internal_tape_block_size))) {
955    log_OS_error(g_tape_fifo);
956    log_to_screen("Cannot openin stream device");
957    return (1);
958}
959return (0);
960}
961
962
963
964
965/**
966 * Copy a file from the opened stream (CD or tape) to @p outfile.
967 * @param outfile The file to write to.
968 * @param size The size of the file in the input stream.
969 * @return 0 for success, nonzero for failure.
970 */
971int
972read_file_from_stream_to_file(char *outfile, long long size)
973{
974
975    /*@ int ******************************************************** */
976    int res;
977
978    /*@ end vars *************************************************** */
979
980    res = read_file_from_stream_FULL(outfile, NULL, size);
981
982    return (res);
983}
984
985
986
987/**
988 * Copy a file from the currently opened stream (CD or tape) to the stream indicated
989 * by @p fout.
990 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
991 * @param fout The stream to write the file to.
992 * @param size The size of the file in bytes.
993 * @return 0 for success, nonzero for failure.
994 */
995int
996read_file_from_stream_to_stream(FILE * fout, long long size)
997{
998
999    /*@ int ******************************************************** */
1000    int res;
1001
1002    /*@ end vars *************************************************** */
1003
1004    res = read_file_from_stream_FULL(NULL, fout, size);
1005/*  fflush(g_tape_stream);
1006  fflush(fout);*/
1007    return (res);
1008}
1009
1010
1011
1012/**
1013 * Copy a file from the currently opened stream (CD or tape) to either a
1014 * @c FILE pointer indicating a currently-opened file, or a filename indicating
1015 * a new file to create. This is the backbone function that read_file_from_stream_to_file()
1016 * and read_file_from_stream_to_stream() are wrappers for.
1017 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1018 * @param outfname If non-NULL, write to this file.
1019 * @param foutstream If non-NULL, write to this stream.
1020 * @param orig_size The original length of the file in bytes.
1021 * @return 0 for success, nonzero for failure.
1022 * @note Only @b one of @p outfname or @p foutstream may be non-NULL.
1023 */
1024int
1025read_file_from_stream_FULL(char *outfname, FILE * foutstream, long long orig_size)
1026{
1027    /*@ buffers ***************************************************** */
1028    char *datablock;
1029    char *temp_fname;
1030    char *temp_cksum;
1031    char *actual_cksum = NULL;
1032
1033    /*@ int ********************************************************* */
1034    int retval = 0;
1035#ifdef EXTRA_TAPE_CHECKSUMS
1036    int i, ch;
1037#endif
1038    int noof_blocks;
1039    int ctrl_chr;
1040    int res;
1041    /*@ pointers **************************************************** */
1042    FILE *fout;
1043
1044    /*@ long    ***************************************************** */
1045    long bytes_to_write = 0L /*,i */ ;
1046//  long bytes_successfully_read_in_this_time = 0;
1047
1048    /*@ long long *************************************************** */
1049    long long temp_size, size;
1050    long bytes_read, bytes_to_read;
1051    long long total_read_from_tape_for_this_file = 0;
1052    long long where_I_was_before_tape_change = 0;
1053    /*@ unsigned int ************************************************ */
1054    /*  unsigned int ch; */
1055    unsigned int crc16;
1056    unsigned int crctt;
1057
1058    bool had_to_resync = FALSE;
1059
1060    /*@ init  ******************************************************* */
1061    malloc_string(temp_fname);
1062    malloc_string(temp_cksum);
1063    datablock = malloc(TAPE_BLOCK_SIZE);
1064    crc16 = 0;
1065    crctt = 0;
1066    size = orig_size;
1067
1068    /*@ end vars *************************************************** */
1069
1070    res = read_header_block_from_stream(&temp_size, temp_fname, &ctrl_chr);
1071    if (orig_size != temp_size && orig_size != -1) {
1072        log_to_screen("output file's size should be %ld K but is apparently %ld K", (long) size >> 10, (long) temp_size >> 10);
1073    }
1074    if (ctrl_chr != BLK_START_FILE) {
1075        wrong_marker(BLK_START_FILE, ctrl_chr);
1076        return (1);
1077    }
1078
1079    if (foutstream) {
1080        fout = foutstream;
1081    } else {
1082        fout = fopen(outfname, "w");
1083    }
1084    if (!fout) {
1085        log_OS_error(outfname);
1086        log_to_screen("Cannot openout file");
1087        return (1);
1088    }
1089    total_read_from_tape_for_this_file = 0;
1090    for (noof_blocks = 0; size > 0;
1091         noof_blocks++, size -=
1092         bytes_to_write, total_read_from_tape_for_this_file +=
1093         bytes_read) {
1094        bytes_to_write =
1095            (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1096        bytes_to_read = TAPE_BLOCK_SIZE;
1097        bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1098        while (bytes_read < bytes_to_read) {    // next tape!
1099//    crctt=crc16=0;
1100            where_I_was_before_tape_change = size;
1101            log_msg(4, "where_I_was_... = %lld",
1102                    where_I_was_before_tape_change);
1103            start_to_read_from_next_tape();
1104            log_msg(4, "Started reading from next tape.");
1105            skip_incoming_files_until_we_find_this_one(temp_fname);
1106            log_msg(4, "Skipped irrelevant files OK.");
1107            for (size = orig_size; size > where_I_was_before_tape_change;
1108                 size -= bytes_to_write) {
1109                bytes_read =
1110                    fread(datablock, 1, bytes_to_read, g_tape_stream);
1111            }
1112            log_msg(4, "'size' is now %lld (should be %lld)", size,
1113                    where_I_was_before_tape_change);
1114            log_to_screen("Successfully re-sync'd tape");
1115            had_to_resync = TRUE;
1116            bytes_read = fread(datablock, 1, bytes_to_read, g_tape_stream);
1117        }
1118
1119        (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
1120
1121#ifdef EXTRA_TAPE_CHECKSUMS
1122        for (i = 0; i < (int) bytes_to_write; i++) {
1123            ch = datablock[i];
1124            crc16 = updcrcr(crc16, (unsigned) ch);
1125            crctt = updcrc(crctt, (unsigned) ch);
1126        }
1127#endif
1128    }
1129    log_msg(6, "Total read from tape for this file = %lld",
1130            total_read_from_tape_for_this_file);
1131    log_msg(6, ".......................... Should be %lld", orig_size);
1132    g_tape_posK += total_read_from_tape_for_this_file / 1024;
1133    mr_asprintf(actual_cksum, "%04x%04x", crc16, crctt);
1134    if (foutstream) {           /*log_it("Finished writing to foutstream"); */
1135    } else {
1136        paranoid_fclose(fout);
1137    }
1138    res = read_header_block_from_stream(&temp_size, temp_cksum, &ctrl_chr);
1139    if (ctrl_chr != BLK_STOP_FILE) {
1140        wrong_marker(BLK_STOP_FILE, ctrl_chr);
1141    }
1142    if (strcmp(temp_cksum, actual_cksum)) {
1143        log_to_screen("actual cksum=%s; recorded cksum=%s", actual_cksum, temp_cksum);
1144        log_to_screen("%s (%ld K) is corrupt on tape", temp_fname, (long) orig_size >> 10);
1145        retval++;
1146    }
1147    mr_free(actual_cksum);
1148
1149    paranoid_free(datablock);
1150    paranoid_free(temp_fname);
1151    paranoid_free(temp_cksum);
1152    return (retval);
1153}
1154
1155
1156
1157/**
1158 * Read a header block from the currently opened stream (CD or tape).
1159 * This block indicates the length of the following file (if it's file-related)
1160 * the filename (if it's file-related), and the block type.
1161 * @param plen Where to put the length of the file. Valid only for file-related header blocks.
1162 * @param filename Where to put the name of the file. Valid only for file-related header blocks.
1163 * @param pcontrol_char Where to put the type of block (e.g. start-file, end-file, start-tape, ...)
1164 * @return 0 for success, nonzero for failure.
1165 * @note If you read a marker (@p pcontrol_char) you're not expecting, you can call wrong_marker().
1166 */
1167int
1168read_header_block_from_stream(long long *plen, char *filename,
1169                              int *pcontrol_char)
1170{
1171
1172    /*@ buffers ***************************************************** */
1173    char *tempblock;
1174
1175    /*@ int ********************************************************* */
1176    int i, retval;
1177
1178    /*@ end vars *************************************************** */
1179
1180    tempblock = (char *) malloc((size_t) TAPE_BLOCK_SIZE);
1181
1182    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1183        tempblock[i] = 0;
1184    }
1185    while (!(*pcontrol_char = tempblock[7000])) {
1186        g_tape_posK +=
1187            fread(tempblock, 1, (size_t) TAPE_BLOCK_SIZE,
1188                  g_tape_stream) / 1024;
1189    }
1190/*  memcpy((char*)plength_of_incoming_file,(char*)tempblock+7001,sizeof(long long)); */
1191/*  for(*plen=0,i=7;i>=0;i--) {*plen<<=8; *plen |= tempblock[7001+i];} */
1192    memcpy((char *) plen, tempblock + 7001, sizeof(long long));
1193    if (strcmp(tempblock + 6000 + *pcontrol_char, STR_HEADER)) {
1194        log_it("Bad header block at %ld K", (long) g_tape_posK);
1195    }
1196    strcpy(filename, tempblock + 1000);
1197/*  strcpy(cksum,tempblock+5555);*/
1198/*  log_it( "%s  (reading) fname=%s, filesize=%ld K",
1199       marker_to_string (*pcontrol_char), filename,
1200       (long) ((*plen) >> 10));
1201*/
1202    if (*pcontrol_char == BLK_ABORTED_BACKUP) {
1203        log_to_screen("I can't verify an aborted backup.");
1204        retval = 1;
1205    } else {
1206        retval = 0;
1207    }
1208    for (i = 1000; i < 1020; i++) {
1209        if (tempblock[i] < 32 || tempblock[i] > 126) {
1210            tempblock[i] = ' ';
1211        }
1212    }
1213    tempblock[i] = '\0';
1214    log_msg(6, "%s (fname=%s, size=%ld K)",
1215            marker_to_string(*pcontrol_char), tempblock + 1000,
1216            (long) (*plen) >> 10);
1217    paranoid_free(tempblock);
1218    return (retval);
1219}
1220
1221
1222
1223/**
1224 * Add specified file/slice to the internal catalog of all archives written.
1225 * This lets us restart on a new CD/tape/whatever if it runs out of room. We just
1226 * write the last [buffer size] MB from the catalog to the new tape, so we know
1227 * we have @e all archives on some CD/tape/whatever.
1228 * @param type The type of file we're cataloging (afioball, slice, something else)
1229 * @param number The fileset number or biggiefile number.
1230 * @param aux The slice number if it's a biggiefile, or any other additional info.
1231 * @param fn The original full pathname of the file we're recording.
1232 * @return The index of the record we just added.
1233 */
1234int register_in_tape_catalog(t_archtype type, int number, long aux,
1235                             char *fn)
1236{
1237    int last;
1238    char fname[MAX_TAPECAT_FNAME_LEN+1];
1239    char *p;
1240
1241    p = strrchr(fn, '/');
1242    if (p) {
1243        p++;
1244    } else {
1245        p = fn;
1246    }
1247    strncpy(fname, p, MAX_TAPECAT_FNAME_LEN);
1248    fname[MAX_TAPECAT_FNAME_LEN] = '\0';
1249    last = g_tapecatalog->entries;
1250    if (last >= MAX_TAPECATALOG_ENTRIES) {
1251        log_it
1252            ("Warning - can't log #%d in tape catalog - too many entries already",
1253             number);
1254        return (-1);
1255    }
1256    g_tapecatalog->el[last].type = type;
1257    g_tapecatalog->el[last].number = number;
1258    g_tapecatalog->el[last].aux = aux;
1259    g_tapecatalog->el[last].tape_posK = g_tape_posK;
1260    strcpy(g_tapecatalog->el[last].fname, fname);
1261    g_tapecatalog->entries++;
1262    return (last);              // returns the index of the record we've jsut added
1263}
1264
1265
1266
1267
1268/**
1269 * Decide whether we should start a new tape. This is TRUE if we've run out of tape
1270 * (got SIGPIPE) or look like we will.
1271 * @param mediasize The size of the tape in megabytes.
1272 * @param length_of_incoming_file The length of the file we're about to write, in bytes.
1273 * @bug This seems like it'll only work for media_size != autodetect, but Mondo only allows
1274 * autodetecting the size. Huh?
1275 */
1276
1277/* BERLIOS: Should be reviewed for mediasize being a off_t ??? */
1278bool
1279should_we_write_to_next_tape(long mediasize,
1280                             off_t length_of_incoming_file)
1281{
1282    /*@ bool's ***************************************************** */
1283    bool we_need_a_new_tape = FALSE;
1284
1285    /*@ end vars *************************************************** */
1286
1287    if (mediasize == 0) {
1288        return (FALSE);
1289    }
1290    if (mediasize > 0 && (g_tape_posK >> 10 >= mediasize)) {
1291        log_it("mediasize = %ld", mediasize);
1292        we_need_a_new_tape = TRUE;
1293        log_to_screen("Should have started a new tape/CD already");
1294    }
1295    if ((g_tape_posK + length_of_incoming_file / 1024) >> 10 >=
1296        mediasize - (SLICE_SIZE * 4 / 1024)) {
1297        log_it("g_tape_posK = %ld\nmediasize = %ld\n", g_tape_posK,
1298               mediasize);
1299        we_need_a_new_tape = TRUE;
1300    }
1301    return (we_need_a_new_tape);
1302}
1303
1304
1305/**
1306 * Seek through the stream until we find a header block where the NAME field matches
1307 * @p the_file_I_was_reading. This is useful if you've just started reading from
1308 * a new tape and want to find the file you were reading when the tape ended.
1309 * @param the_file_I_was_reading File name to look for.
1310 * @return 0 for success, nonzero for failure.
1311 */
1312int skip_incoming_files_until_we_find_this_one(char
1313                                               *the_file_I_was_reading)
1314{
1315    char *pA;
1316    char *pB;
1317    int res;
1318    int ctrl_chr;
1319    char *temp_fname;
1320    char *datablock;
1321    long long temp_size, size;
1322    long bytes_to_write;
1323
1324    datablock = malloc(TAPE_BLOCK_SIZE);
1325    malloc_string(temp_fname);
1326    pB = strrchr(the_file_I_was_reading, '/');
1327    if (pB) {
1328        pB++;
1329    } else {
1330        pB = the_file_I_was_reading;
1331    }
1332    log_msg(1, "skip_incoming_..(%s)", pB);
1333    log_msg(2, "Looking for initial START_AN_AFIO_OR_SLICE");
1334    ctrl_chr = -1;
1335    while (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1336        res =
1337            read_header_block_from_stream(&temp_size, temp_fname,
1338                                          &ctrl_chr);
1339        if (ctrl_chr == BLK_START_AN_AFIO_OR_SLICE) {
1340            break;
1341        }
1342        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1343        wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1344        log_msg(3, "Still trying to re-sync w/ tape");
1345    }
1346    while (ctrl_chr != BLK_START_FILE) {
1347        res =
1348            read_header_block_from_stream(&temp_size, temp_fname,
1349                                          &ctrl_chr);
1350        if (ctrl_chr == BLK_START_FILE) {
1351            break;
1352        }
1353        log_msg(1, "%lld %s %c", temp_size, temp_fname, ctrl_chr);
1354        wrong_marker(BLK_START_FILE, ctrl_chr);
1355        log_msg(3, "Still trying to re-sync w/ tape");
1356    }
1357    pA = strrchr(temp_fname, '/');
1358    if (pA) {
1359        pA++;
1360    } else {
1361        pA = temp_fname;
1362    }
1363    pB = strrchr(the_file_I_was_reading, '/');
1364    if (pB) {
1365        pB++;
1366    } else {
1367        pB = the_file_I_was_reading;
1368    }
1369    while (strcmp(pA, pB)) {
1370        log_msg(6, "Skipping %s (it's not %s)", temp_fname,
1371                the_file_I_was_reading);
1372        for (size = temp_size; size > 0; size -= bytes_to_write) {
1373            bytes_to_write =
1374                (size < TAPE_BLOCK_SIZE) ? (long) size : TAPE_BLOCK_SIZE;
1375            // FIXME - needs error-checking and -catching
1376            fread(datablock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream);
1377        }
1378        res =
1379            read_header_block_from_stream(&temp_size, temp_fname,
1380                                          &ctrl_chr);
1381        if (ctrl_chr != BLK_STOP_FILE) {
1382            wrong_marker(BLK_STOP_FILE, ctrl_chr);
1383        }
1384        res =
1385            read_header_block_from_stream(&temp_size, temp_fname,
1386                                          &ctrl_chr);
1387        if (ctrl_chr != BLK_STOP_AN_AFIO_OR_SLICE) {
1388            wrong_marker(BLK_STOP_AN_AFIO_OR_SLICE, ctrl_chr);
1389        }
1390        res =
1391            read_header_block_from_stream(&temp_size, temp_fname,
1392                                          &ctrl_chr);
1393        if (ctrl_chr != BLK_START_AN_AFIO_OR_SLICE) {
1394            wrong_marker(BLK_START_AN_AFIO_OR_SLICE, ctrl_chr);
1395        }
1396        res =
1397            read_header_block_from_stream(&temp_size, temp_fname,
1398                                          &ctrl_chr);
1399        if (ctrl_chr != BLK_START_FILE) {
1400            wrong_marker(BLK_START_FILE, ctrl_chr);
1401        }
1402        pA = strrchr(temp_fname, '/');
1403        if (pA) {
1404            pA++;
1405        } else {
1406            pA = temp_fname;
1407        }
1408        pB = strrchr(the_file_I_was_reading, '/');
1409        if (pB) {
1410            pB++;
1411        } else {
1412            pB = the_file_I_was_reading;
1413        }
1414    }
1415    log_msg(2, "Reading %s (it matches %s)", temp_fname,
1416            the_file_I_was_reading);
1417    paranoid_free(temp_fname);
1418    paranoid_free(datablock);
1419    return (0);
1420}
1421
1422
1423/**
1424 * Start to read from the next tape. Assumes the user has already inserted it.
1425 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1426 * @return 0 for success, nonzero for failure.
1427 */
1428int start_to_read_from_next_tape()
1429{
1430    /*@ int ********************************************************* */
1431    int res = 0;
1432    char *sz_msg;
1433    int ctrlchr;
1434    long long temp_size;
1435    malloc_string(sz_msg);
1436    /*@ end vars *************************************************** */
1437
1438    if (bkpinfo->media_device == NULL) {
1439        log_it("Unable to open in from NULL device");
1440        return (1);
1441    }
1442
1443    paranoid_pclose(g_tape_stream);
1444    sync();
1445    sync();
1446    sync();
1447    log_it("Next tape requested.");
1448    insist_on_this_tape_number(g_current_media_number + 1); // will increment it, too
1449    log_it("Opening IN the next tape");
1450    if (!(g_tape_stream = open_device_via_buffer(bkpinfo->media_device, 'r', bkpinfo->internal_tape_block_size))) {
1451        log_OS_error(g_tape_fifo);
1452        log_to_screen("Cannot openin stream device");
1453        return (1);
1454    }
1455    g_tape_posK = 0;
1456    g_sigpipe = FALSE;
1457    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1458    if (ctrlchr != BLK_START_OF_TAPE) {
1459        wrong_marker(BLK_START_OF_TAPE, ctrlchr);
1460    }
1461    res += read_header_block_from_stream(&temp_size, sz_msg, &ctrlchr); /* just in case */
1462    if (ctrlchr != BLK_START_OF_BACKUP) {
1463        wrong_marker(BLK_START_OF_BACKUP, ctrlchr);
1464    } else {
1465        log_msg(3, "Next tape opened OK. Whoopee!");
1466    }
1467    paranoid_free(sz_msg);
1468    return (res);
1469}
1470
1471
1472
1473/**
1474 * Start to write to the next tape. Assume the user has already inserted it.
1475 * @param bkpinfo The backup information structure. @c bkpinfo->media_device is the only field used.
1476 * @return 0 for success, nonzero for failure.
1477 */
1478int start_to_write_to_next_tape()
1479{
1480    int res = 0;
1481    char *command = NULL;
1482
1483    if (bkpinfo->media_device == NULL) {
1484        log_it("Unable to open out from NULL device");
1485        return (1);
1486    }
1487
1488    paranoid_pclose(g_tape_stream);
1489    system("sync");
1490    system("sync");
1491    system("sync");
1492    log_it("New tape requested.");
1493    insist_on_this_tape_number(g_current_media_number + 1); // will increment g_current_media, too
1494    if (g_current_media_number > MAX_NOOF_MEDIA) {
1495        res++;
1496        log_to_screen("Too many tapes. Man, you need to use nfs!");
1497    }
1498    if (bkpinfo->backup_media_type == cdstream) {
1499        mr_asprintf(command, "cdrecord -eject dev=%s speed=%d fs=24m -waiti - >> %s 2>> %s", bkpinfo->media_device, bkpinfo->cdrw_speed, MONDO_LOGFILE, MONDO_LOGFILE);
1500        log_it("Opening OUT to next CD with the command");
1501        log_it(command);
1502        log_it("Let's see what happens, shall we?");
1503        g_tape_stream = popen(command, "w");
1504        mr_free(command);
1505
1506        if (!g_tape_stream) {
1507            log_to_screen("Failed to openout to cdstream (fifo)");
1508            return (1);
1509        }
1510    } else {
1511        log_it("Opening OUT to next tape");
1512        if (!(g_tape_stream = open_device_via_buffer(bkpinfo->media_device, 'w', bkpinfo->internal_tape_block_size))) {
1513            log_OS_error(g_tape_fifo);
1514            log_to_screen("Cannot openin stream device");
1515            return (1);
1516        }
1517    }
1518    g_tape_posK = 0;
1519    g_sigpipe = FALSE;
1520    res += write_header_block_to_stream((off_t)0, "start-of-tape", BLK_START_OF_TAPE);  /* just in case */
1521    res += write_header_block_to_stream((off_t)0, "start-of-backup", BLK_START_OF_BACKUP);  /* just in case */
1522    return (res);
1523}
1524
1525
1526
1527
1528/**
1529 * Write a bufferfull of the most recent archives to the tape. The
1530 * rationale behind this is a bit complex. If the previous tape ended
1531 * suddenly (EOF or otherwise) some archives were probably left in the
1532 * buffer. That means that Mondo thinks they have been written, but
1533 * the external binary @c buffer has not actually written them. So to
1534 * be safe, we start the new tape by writing the last bufferfull from
1535 * the old one. This insures that all archives will be on at least
1536 * one tape. Sounds inelegant, but it works.
1537 * @param bkpinfo The backup information structure. @c bkpinfo->tmpdir is the only field used.
1538 * @return 0 for success, nonzero for failure.
1539 */
1540int write_backcatalog_to_tape()
1541{
1542    int i, last, res = 0;
1543    char *fname = NULL;
1544
1545    log_msg(2, "I am now writing back catalog to tape");
1546    last = g_tapecatalog->entries - 1;
1547    for (i = 0; i <= last; i++) {
1548        mr_asprintf(fname, "%s/tmpfs/backcatalog/%s", bkpinfo->tmpdir, g_tapecatalog->el[i].fname);
1549        if (!does_file_exist(fname)) {
1550            log_msg(6, "Can't write %s - it doesn't exist.", fname);
1551        } else {
1552            write_header_block_to_stream(length_of_file(fname),
1553                                         "start-backcatalog-afio-or-slice",
1554                                         BLK_START_AN_AFIO_OR_SLICE);
1555            log_msg(2, "Writing %s", fname);
1556            if (write_file_to_stream_from_file(fname)) {
1557                res++;
1558                log_msg(2, "%s failed", fname);
1559            }
1560            if (i != last) {
1561                write_header_block_to_stream((off_t)0,
1562                                             "stop-backcatalog-afio-or-slice",
1563                                             BLK_STOP_AN_AFIO_OR_SLICE);
1564            }
1565        }
1566        mr_free(fname);
1567    }
1568    log_msg(2, "Finished writing back catalog to tape");
1569    return (res);
1570}
1571
1572
1573
1574/**
1575 * Write all.tar.gz (produced by Mindi) to the first 32M of the first tape.
1576 * @param fname The path to all.tar.gz.
1577 * @return 0 for success, nonzero for failure.
1578 */
1579int write_data_disks_to_stream(char *fname)
1580{
1581    /*@ pointers *************************************************** */
1582    FILE *fin;
1583
1584    /*@ long ******************************************************* */
1585    long m = -1;
1586    long templong;
1587
1588    /*@ int ******************************************************** */
1589    int i, j;
1590
1591    /*@ buffers **************************************************** */
1592    char tempblock[256 * 1024];
1593
1594    /*@ end vars *************************************************** */
1595
1596    open_evalcall_form("Writing data disks to tape");
1597    log_to_screen("Writing data disks to tape");
1598    log_it("Data disks = %s", fname);
1599    if (!does_file_exist(fname)) {
1600        log_to_screen("Cannot find %s", fname);
1601        return (1);
1602    }
1603    if (!(fin = fopen(fname, "r"))) {
1604        log_OS_error(fname);
1605        fatal_error("Cannot openin the data disk");
1606    }
1607    for (i = 0; i < 32; i++) {  /* 32MB */
1608        for (j = 0; j < 4; j++) {   /* 256K x 4 = 1MB (1024K) */
1609            if (!feof(fin)) {
1610                m = (long) fread(tempblock, 1, 256 * 1024, fin);
1611            } else {
1612                m = 0;
1613            }
1614            for (; m < 256 * 1024; m++) {
1615                tempblock[m] = '\0';
1616            }
1617            g_tape_posK +=
1618                fwrite(tempblock, 1, 256 * 1024, g_tape_stream) / 1024;
1619        }
1620        if (i > g_tape_buffer_size_MB)  // otherwise, 'buffer' distorts calculations
1621        {
1622            templong = ((i - 8) * 4 + j) * 100 / (128 - 8 * 4);
1623            update_evalcall_form((int) (templong));
1624        }
1625    }
1626    paranoid_fclose(fin);
1627    close_evalcall_form();
1628    return (0);
1629}
1630
1631
1632
1633
1634/**
1635 * Copy @p infile to the opened stream (CD or tape).
1636 * @param bkpinfo The backup information structure. @c bkpinfo->media_size is the only field used.
1637 * @param infile The file to write to the stream.
1638 * @return 0 for success, nonzero for failure.
1639 */
1640int write_file_to_stream_from_file(char *infile)
1641{
1642    /*@ buffers **************************************************** */
1643    char datablock[TAPE_BLOCK_SIZE];
1644    char *checksum = NULL;
1645    char *infile_basename;
1646
1647    /*@ int ******************************************************** */
1648    int retval = 0;
1649    int noof_blocks;
1650
1651    /*  unsigned int ch; */
1652    unsigned int crc16;
1653    unsigned int crctt;
1654
1655    /*@ pointers *************************************************** */
1656    FILE *fin;
1657    char *p;
1658
1659    /*@ long ******************************************************* */
1660    long bytes_to_read = 0;
1661    long i;
1662
1663    off_t filesize;
1664
1665#ifdef EXTRA_TAPE_CHECKSUMS
1666    int ch;
1667#endif
1668
1669    /*@ initialize ************************************************ */
1670    crc16 = 0;
1671    crctt = 0;
1672
1673
1674
1675    /*@ end vars *************************************************** */
1676
1677    infile_basename = strrchr(infile, '/');
1678    if (infile_basename) {
1679        infile_basename++;
1680    } else {
1681        infile_basename = infile;
1682    }
1683    filesize = length_of_file(infile);
1684    if (should_we_write_to_next_tape
1685        (bkpinfo->media_size[g_current_media_number], filesize)) {
1686        start_to_write_to_next_tape();
1687        write_backcatalog_to_tape();
1688    }
1689    p = strrchr(infile, '/');
1690    if (!p) {
1691        p = infile;
1692    } else {
1693        p++;
1694    }
1695    log_it("Writing file '%s' to tape (%ld KB)", p, (long) filesize >> 10);
1696    write_header_block_to_stream(filesize, infile_basename,
1697                                 BLK_START_FILE);
1698//go_here_to_restart_saving_of_file:
1699    if (!(fin = fopen(infile, "r"))) {
1700        log_OS_error(infile);
1701        return (1);
1702    }
1703    for (noof_blocks = 0; filesize > 0;
1704         noof_blocks++, filesize -= bytes_to_read) {
1705        if (filesize < TAPE_BLOCK_SIZE) {
1706            bytes_to_read = (long) filesize;
1707            for (i = 0; i < TAPE_BLOCK_SIZE; i++) {
1708                datablock[i] = '\0';
1709            }
1710        } else {
1711            bytes_to_read = TAPE_BLOCK_SIZE;
1712        }
1713        (void) fread(datablock, 1, (size_t) bytes_to_read, fin);
1714        g_tape_posK +=
1715            fwrite(datablock, 1, /*bytes_to_read */ 
1716                   (size_t) TAPE_BLOCK_SIZE,
1717                   g_tape_stream) / 1024;
1718        if (g_sigpipe) {
1719            log_it("Sigpipe occurred recently. I'll start a new tape.");
1720            fclose(fin);
1721            g_sigpipe = FALSE;
1722            start_to_write_to_next_tape();
1723            write_backcatalog_to_tape();    // kinda-sorta recursive :)
1724            return (0);
1725        }
1726#ifdef EXTRA_TAPE_CHECKSUMS
1727        for (i = 0; i < bytes_to_read; i++) {
1728            ch = datablock[i];
1729            crc16 = updcrcr(crc16, (unsigned) ch);
1730            crctt = updcrc(crctt, (unsigned) ch);
1731        }
1732#endif
1733    }
1734    paranoid_fclose(fin);
1735    mr_asprintf(checksum, "%04x%04x", crc16, crctt);
1736    /* BERLIOS: what does it do ??? */
1737    write_header_block_to_stream((off_t)g_current_media_number, checksum, BLK_STOP_FILE);
1738    mr_free(checksum);
1739
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 *p;
1766
1767    /*@ int ******************************************************** */
1768    int i;
1769
1770    off_t olen;
1771
1772    /*@ end vars *************************************************** */
1773
1774
1775    olen = length_of_incoming_file;
1776    p = strrchr(filename, '/'); /* Make 'em go, "Unnnh!" Oh wait, that was _Master_ P... */
1777    if (!p) {
1778        p = filename;
1779    } else {
1780        p++;
1781    }
1782    if (!g_tape_stream) {
1783        log_to_screen("You're not backing up to tape. Why write a tape header?");
1784        return (1);
1785    }
1786    for (i = 0; i < (int) TAPE_BLOCK_SIZE; i++) {
1787        tempblock[i] = 0;
1788    }
1789    sprintf(tempblock + 6000 + control_char, STR_HEADER);
1790    tempblock[7000] = control_char;
1791    memcpy(tempblock + 7001, (char *) &olen, sizeof(off_t));
1792    strcpy(tempblock + 1000, filename);
1793    g_tape_posK += fwrite(tempblock, 1, (size_t) TAPE_BLOCK_SIZE, g_tape_stream) / 1024;
1794    log_msg(6, "%s (fname=%s, size=%ld K)", marker_to_string(control_char), p, (long) length_of_incoming_file >> 10);
1795    return (0);
1796}
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807/**
1808 * Log (to screen) an erroneous marker, along with what it should have been.
1809 * @param should_be What we were expecting.
1810 * @param it_is What we got.
1811 */
1812void wrong_marker(int should_be, int it_is)
1813{
1814    log_to_screen("Wrong marker! (Should be %s, is actually %s)", marker_to_string(should_be), marker_to_string(it_is));
1815}
1816
1817/* @} - end of streamGroup */
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