Changeset 1770 in MondoRescue for branches/stable/mindi-busybox/coreutils/dd.c


Ignore:
Timestamp:
Nov 6, 2007, 11:01:53 AM (12 years ago)
Author:
Bruno Cornec
Message:
  • Better output for mindi-busybox revision
  • Remove dummy file created on NFS - report from Arnaud Tiger <arnaud.tiger_at_hp.com>
  • strace useful for debug
  • fix new versions for pb (2.0.0 for mindi and 1.7.2 for mindi-busybox)
  • fix build process for mindi-busybox + options used in that version (dd for label-partitions-as-necessary)
  • fix typo in label-partitions-as-necessary which doesn't seem to work
  • Update to busybox 1.7.2
  • perl is now required at restore time to support uuid swap partitions (and will be used for many other thigs

in the future for sure)

  • next mindi version will be 2.0.0 due to all the changes made in it (udev may break working distros)
  • small optimization in mindi on keyboard handling (one single find instead of multiple)
  • better interaction for USB device when launching mindi manually
  • attempt to automatically guess block disk size for ramdisk
  • fix typos in bkphw
  • Fix the remaining problem with UUID support for swap partitions
  • Updates mondoarchive man page for USB support
  • Adds preliminary Hardware support to mindi (Proliant SSSTK)
  • Tries to add udev support also for rhel4
  • Fix UUID support which was still broken.
  • Be conservative in test for the start-nfs script
  • Update config file for mindi-busybox for 1.7.2 migration
  • Try to run around a busybox bug (1.2.2 pb on inexistant links)
  • Add build content for mindi-busybox in pb
  • Remove distributions content for mindi-busybox
  • Fix a warning on inexistant raidtab
  • Solve problem on tmpfs in restore init (Problem of inexistant symlink and busybox)
  • Create MONDO_CACHE and use it everywhere + creation at start
  • Really never try to eject a USB device
  • Fix a issue with &> usage (replaced with 1> and 2>)
  • Adds magic file to depllist in order to have file working + ldd which helps for debugging issues
  • tty modes correct to avoid sh error messages
  • Use ext3 normally and not ext2 instead
  • USB device should be corrected after reading (take 1st part)
  • Adds a mount_USB_here function derived from mount_CDROM_here
  • usb detection place before /dev detection in device name at restore time
  • Fix when restoring from USB: media is asked in interactive mode
  • Adds USB support for mondorestore
  • mount_cdrom => mount_media
  • elilo.efi is now searched throughout /boot/efi and not in a fixed place as there is no standard
  • untar-and-softlink => untar (+ interface change)
  • suppress useless softlinks creation/removal in boot process
  • avoids udevd messages on groups
  • Increase # of disks to 99 as in mindi at restore time (should be a conf file parameter)
  • skip existing big file creation
  • seems to work correctly for USB mindi boot
  • Adds group and tty link to udev conf
  • Always load usb-torage (even 2.6) to initiate USB bus discovery
  • Better printing of messages
  • Attempt to fix a bug in supporting OpenSusE 10.3 kernel for initramfs (mindi may now use multiple regex for kernel initrd detection)
  • Links were not correctly done as non relative for modules in mindi
  • exclusion of modules denied now works
  • Also create modules in their ordinary place, so that classical modprobe works + copy modules.dep
  • Fix bugs for DENY_MODS handling
  • Add device /dev/console for udev
  • ide-generic should now really be excluded
  • Fix a bug in major number for tty
  • If udev then adds modprobe/insmod to rootfs
  • tty0 is also cretaed with udev
  • ide-generic put rather in DENY_MODS
  • udevd remove from deplist s handled in mindi directly
  • better default for mindi when using --usb
  • Handles dynamically linked busybox (in case we want to use it soon ;-)
  • Adds fixed devices to create for udev
  • ide-generic should not be part of the initrd when using libata v2
  • support a dynamically linked udev (case on Ubuntu 7.10 and Mandriva 2008.0 so should be quite generic) This will give incitation to move to dyn. linked binaries in the initrd which will help for other tasks (ia6 4)
  • Improvement in udev support (do not use cl options not available in busybox)
  • Udev in mindi
    • auto creation of the right links at boot time with udev-links.conf(from Mandriva 2008.0)
    • rework startup of udev as current makes kernel crash (from Mandriva 2008.0)
    • add support for 64 bits udev
  • Try to render MyInsmod? silent at boot time
  • Adds udev support (mandatory for newest distributions to avoid remapping of devices in a different way as on the original system)
  • We also need vaft format support for USB boot
  • Adds libusual support (Ubuntu 7.10 needs it for USB)
  • Improve Ubuntu/Debian? keyboard detection and support
  • pbinit adapted to new pb (0.8.10). Filtering of docs done in it
  • Suppress some mondo warnings and errors on USB again
  • Tries to fix lack of files in deb mindi package
  • Verify should now work for USB devices
  • More log/mesages improvement for USB support
  • - Supress g_erase_tmpdir_and_scratchdir
  • Improve some log messages for USB support
  • Try to improve install in mindi to avoid issues with isolinux.cfg not installed vene if in the pkg :-(
  • Improve mindi-busybox build
  • In conformity with pb 0.8.9
  • Add support for Ubuntu 7.10 in build process
  • Add USB Key button to Menu UI (CD streamer removed)
  • Attempt to fix error messages on tmp/scratch files at the end by removing those dir at the latest possible.
  • Fix a bug linked to the size of the -E param which could be used (Arnaud Tiger/René? Ribaud).
  • Integrate ~/.pbrc content into mondorescue.pb (required project-builder >= 0.8.7)
  • Put mondorescue in conformity with new pb filtering rules
  • Add USB support at restore time (no test done yet). New start-usb script PB varibale added where useful
  • Unmounting USB device before removal of temporary scratchdir
  • Stil refining USB copy back to mondo (one command was not executed)
  • No need to have the image subdor in the csratchdir when USB.
  • umount the USB partition before attempting to use it
  • Remove useless copy from mindi to mondo at end of USB handling

(risky merge, we are raising the limits of 2 diverging branches. The status of stable is not completely sure as such. Will need lots of tests, but it's not yet done :-()
(merge -r1692:1769 $SVN_M/branches/2.2.5)

File:
1 edited

Legend:

Unmodified
Added
Removed
  • branches/stable/mindi-busybox/coreutils/dd.c

    r821 r1770  
    99 */
    1010
    11 #include <sys/types.h>
    12 #include <sys/stat.h>
    13 #include <stdlib.h>
    14 #include <stdio.h>
    15 #include <unistd.h>
    16 #include <string.h>
    17 #include <fcntl.h>
    18 #include <signal.h>  // For FEATURE_DD_SIGNAL_HANDLING
    19 #include "busybox.h"
     11#include <signal.h>  /* For FEATURE_DD_SIGNAL_HANDLING */
     12#include "libbb.h"
     13
     14/* This is a NOEXEC applet. Be very careful! */
     15
    2016
    2117static const struct suffix_mult dd_suffixes[] = {
     
    2521    { "kD", 1000 },
    2622    { "k", 1024 },
     23    { "K", 1024 },  /* compat with coreutils dd */
    2724    { "MD", 1000000 },
    2825    { "M", 1048576 },
    2926    { "GD", 1000000000 },
    3027    { "G", 1073741824 },
    31     { NULL, 0 }
     28    { }
    3229};
    3330
    34 static size_t out_full;
    35 static size_t out_part;
    36 static size_t in_full;
    37 static size_t in_part;
    38 
    39 static void dd_output_status(int cur_signal)
     31struct globals {
     32    off_t out_full, out_part, in_full, in_part;
     33};
     34#define G (*(struct globals*)&bb_common_bufsiz1)
     35/* We have to zero it out because of NOEXEC */
     36#define INIT_G() memset(&G, 0, sizeof(G))
     37
     38
     39static void dd_output_status(int ATTRIBUTE_UNUSED cur_signal)
    4040{
    41     fprintf(stderr, "%ld+%ld records in\n%ld+%ld records out\n",
    42             (long)in_full, (long)in_part,
    43             (long)out_full, (long)out_part);
     41    /* Deliberately using %u, not %d */
     42    fprintf(stderr, "%"OFF_FMT"u+%"OFF_FMT"u records in\n"
     43            "%"OFF_FMT"u+%"OFF_FMT"u records out\n",
     44            G.in_full, G.in_part,
     45            G.out_full, G.out_part);
    4446}
    4547
     48static ssize_t full_write_or_warn(int fd, const void *buf, size_t len,
     49    const char *const filename)
     50{
     51    ssize_t n = full_write(fd, buf, len);
     52    if (n < 0)
     53        bb_perror_msg("writing '%s'", filename);
     54    return n;
     55}
     56
     57static bool write_and_stats(int fd, const void *buf, size_t len, size_t obs,
     58    const char *filename)
     59{
     60    ssize_t n = full_write_or_warn(fd, buf, len, filename);
     61    if (n < 0)
     62        return 1;
     63    if (n == obs)
     64        G.out_full++;
     65    else if (n) /* > 0 */
     66        G.out_part++;
     67    return 0;
     68}
     69
     70#if ENABLE_LFS
     71#define XATOU_SFX xatoull_sfx
     72#else
     73#define XATOU_SFX xatoul_sfx
     74#endif
     75
     76int dd_main(int argc, char **argv);
    4677int dd_main(int argc, char **argv)
    4778{
    48     size_t count = -1, oc = 0, ibs = 512, obs = 512;
    49     ssize_t n;
    50     off_t seek = 0, skip = 0;
    51     int sync_flag = FALSE, noerror = FALSE, trunc_flag = TRUE, twobufs_flag = 0,
    52         oflag, ifd, ofd, i;
    53     const char *infile = NULL, *outfile = NULL;
     79    enum {
     80        FLAG_SYNC    = 1 << 0,
     81        FLAG_NOERROR = 1 << 1,
     82        FLAG_NOTRUNC = 1 << 2,
     83        FLAG_TWOBUFS = 1 << 3,
     84        FLAG_COUNT   = 1 << 4,
     85    };
     86    static const char keywords[] ALIGN1 =
     87        "bs=\0""count=\0""seek=\0""skip=\0""if=\0""of=\0"
     88#if ENABLE_FEATURE_DD_IBS_OBS
     89        "ibs=\0""obs=\0""conv=\0""notrunc\0""sync\0""noerror\0"
     90#endif
     91        ;
     92    enum {
     93        OP_bs = 1,
     94        OP_count,
     95        OP_seek,
     96        OP_skip,
     97        OP_if,
     98        OP_of,
     99#if ENABLE_FEATURE_DD_IBS_OBS
     100        OP_ibs,
     101        OP_obs,
     102        OP_conv,
     103        OP_conv_notrunc,
     104        OP_conv_sync,
     105        OP_conv_noerror,
     106#endif
     107    };
     108    size_t ibs = 512, obs = 512;
     109    ssize_t n, w;
    54110    char *ibuf, *obuf;
    55 
    56     if (ENABLE_FEATURE_DD_SIGNAL_HANDLING)
    57     {
    58         struct sigaction sa;
    59 
    60         memset(&sa, 0, sizeof(sa));
    61         sa.sa_handler = dd_output_status;
    62         sa.sa_flags = SA_RESTART;
    63         sigemptyset(&sa.sa_mask);
    64         sigaction(SIGUSR1, &sa, 0);
    65     }
    66 
    67     for (i = 1; i < argc; i++) {
    68         if (ENABLE_FEATURE_DD_IBS_OBS && !strncmp("ibs=", argv[i], 4)) {
    69             ibs = bb_xparse_number(argv[i]+4, dd_suffixes);
    70             twobufs_flag++;
    71         } else if (ENABLE_FEATURE_DD_IBS_OBS && !strncmp("obs=", argv[i], 4)) {
    72             obs = bb_xparse_number(argv[i]+4, dd_suffixes);
    73             twobufs_flag++;
    74         } else if (!strncmp("bs=", argv[i], 3)) {
    75             ibs = obs = bb_xparse_number(argv[i]+3, dd_suffixes);
    76         } else if (!strncmp("count=", argv[i], 6))
    77             count = bb_xparse_number(argv[i]+6, dd_suffixes);
    78         else if (!strncmp("seek=", argv[i], 5))
    79             seek = bb_xparse_number(argv[i]+5, dd_suffixes);
    80         else if (!strncmp("skip=", argv[i], 5))
    81             skip = bb_xparse_number(argv[i]+5, dd_suffixes);
    82         else if (!strncmp("if=", argv[i], 3))
    83             infile = argv[i]+3;
    84         else if (!strncmp("of=", argv[i], 3))
    85             outfile = argv[i]+3;
    86         else if (ENABLE_FEATURE_DD_IBS_OBS && !strncmp("conv=", argv[i], 5)) {
    87             ibuf = argv[i]+5;
    88             while (1) {
    89                 if (!strncmp("notrunc", ibuf, 7)) {
    90                     trunc_flag = FALSE;
    91                     ibuf += 7;
    92                 } else if (!strncmp("sync", ibuf, 4)) {
    93                     sync_flag = TRUE;
    94                     ibuf += 4;
    95                 } else if (!strncmp("noerror", ibuf, 7)) {
    96                     noerror = TRUE;
    97                     ibuf += 7;
    98                 } else {
    99                     bb_error_msg_and_die(bb_msg_invalid_arg, argv[i]+5, "conv");
     111    /* And these are all zeroed at once! */
     112    struct {
     113        int flags;
     114        int ifd, ofd;
     115        size_t oc;
     116        off_t count;
     117        off_t seek, skip;
     118        const char *infile, *outfile;
     119#if ENABLE_FEATURE_DD_SIGNAL_HANDLING
     120        struct sigaction sigact;
     121#endif
     122    } Z;
     123#define flags   (Z.flags  )
     124#define ifd     (Z.ifd    )
     125#define ofd     (Z.ofd    )
     126#define oc      (Z.oc     )
     127#define count   (Z.count  )
     128#define seek    (Z.seek   )
     129#define skip    (Z.skip   )
     130#define infile  (Z.infile )
     131#define outfile (Z.outfile)
     132#define sigact  (Z.sigact )
     133
     134    memset(&Z, 0, sizeof(Z));
     135    INIT_G();
     136
     137#if ENABLE_FEATURE_DD_SIGNAL_HANDLING
     138    sigact.sa_handler = dd_output_status;
     139    sigact.sa_flags = SA_RESTART;
     140    sigemptyset(&sigact.sa_mask);
     141    sigaction(SIGUSR1, &sigact, NULL);
     142#endif
     143
     144    for (n = 1; n < argc; n++) {
     145        smalluint key_len;
     146        smalluint what;
     147        char *key;
     148        char *arg = argv[n];
     149
     150//XXX:FIXME: we reject plain "dd --" This would cost ~20 bytes, so..
     151//if (*arg == '-' && *++arg == '-' && !*++arg) continue;
     152        key = strstr(arg, "=");
     153        if (key == NULL)
     154            bb_show_usage();
     155        key_len = key - arg + 1;
     156        key = xstrndup(arg, key_len);
     157        what = index_in_strings(keywords, key) + 1;
     158        if (ENABLE_FEATURE_CLEAN_UP)
     159            free(key);
     160        if (what == 0)
     161            bb_show_usage();
     162        arg += key_len;
     163        /* Must fit into positive ssize_t */
     164#if ENABLE_FEATURE_DD_IBS_OBS
     165            if (what == OP_ibs) {
     166                ibs = xatoul_range_sfx(arg, 1, ((size_t)-1L)/2, dd_suffixes);
     167                continue;
     168            }
     169            if (what == OP_obs) {
     170                obs = xatoul_range_sfx(arg, 1, ((size_t)-1L)/2, dd_suffixes);
     171                continue;
     172            }
     173            if (what == OP_conv) {
     174                while (1) {
     175                    /* find ',', replace them with nil so we can use arg for
     176                     * index_in_strings() without copying.
     177                     * We rely on arg being non-null, else strchr would fault.
     178                     */
     179                    key = strchr(arg, ',');
     180                    if (key)
     181                        *key = '\0';
     182                    what = index_in_strings(keywords, arg) + 1;
     183                    if (what < OP_conv_notrunc)
     184                        bb_error_msg_and_die(bb_msg_invalid_arg, arg, "conv");
     185                    if (what == OP_conv_notrunc)
     186                        flags |= FLAG_NOTRUNC;
     187                    if (what == OP_conv_sync)
     188                        flags |= FLAG_SYNC;
     189                    if (what == OP_conv_noerror)
     190                        flags |= FLAG_NOERROR;
     191                    if (!key) /* no ',' left, so this was the last specifier */
     192                        break;
     193                    arg = key + 1; /* skip this keyword and ',' */
    100194                }
    101                 if (ibuf[0] == '\0') break;
    102                 if (ibuf[0] == ',') ibuf++;
    103             }
    104         } else
    105             bb_show_usage();
    106     }
    107     ibuf = xmalloc(ibs);
    108 
    109     if (twobufs_flag) obuf = xmalloc(obs);
    110     else obuf = ibuf;
    111 
    112     if (infile != NULL) {
    113         ifd = bb_xopen(infile, O_RDONLY);
    114     } else {
    115         ifd = STDIN_FILENO;
     195                continue;
     196            }
     197#endif
     198        if (what == OP_bs) {
     199            ibs = obs = xatoul_range_sfx(arg, 1, ((size_t)-1L)/2, dd_suffixes);
     200            continue;
     201        }
     202        /* These can be large: */
     203        if (what == OP_count) {
     204            flags |= FLAG_COUNT;
     205            count = XATOU_SFX(arg, dd_suffixes);
     206            continue;
     207        }
     208        if (what == OP_seek) {
     209            seek = XATOU_SFX(arg, dd_suffixes);
     210            continue;
     211        }
     212        if (what == OP_skip) {
     213            skip = XATOU_SFX(arg, dd_suffixes);
     214            continue;
     215        }
     216        if (what == OP_if) {
     217            infile = arg;
     218            continue;
     219        }
     220        if (what == OP_of)
     221            outfile = arg;
     222    }
     223//XXX:FIXME for huge ibs or obs, malloc'ing them isn't the brightest idea ever
     224    ibuf = obuf = xmalloc(ibs);
     225    if (ibs != obs) {
     226        flags |= FLAG_TWOBUFS;
     227        obuf = xmalloc(obs);
     228    }
     229    if (infile != NULL)
     230        ifd = xopen(infile, O_RDONLY);
     231    else {
     232        /* ifd = STDIN_FILENO; - it's zero and it's already there */
    116233        infile = bb_msg_standard_input;
    117234    }
    118 
    119235    if (outfile != NULL) {
    120         oflag = O_WRONLY | O_CREAT;
    121 
    122         if (!seek && trunc_flag) {
     236        int oflag = O_WRONLY | O_CREAT;
     237
     238        if (!seek && !(flags & FLAG_NOTRUNC))
    123239            oflag |= O_TRUNC;
    124         }
    125 
    126         ofd = bb_xopen3(outfile, oflag, 0666);
    127 
    128         if (seek && trunc_flag) {
     240
     241        ofd = xopen(outfile, oflag);
     242
     243        if (seek && !(flags & FLAG_NOTRUNC)) {
    129244            if (ftruncate(ofd, seek * obs) < 0) {
    130245                struct stat st;
    131246
    132                 if (fstat (ofd, &st) < 0 || S_ISREG (st.st_mode) ||
    133                         S_ISDIR (st.st_mode)) {
    134                     bb_perror_msg_and_die("%s", outfile);
    135                 }
     247                if (fstat(ofd, &st) < 0 || S_ISREG(st.st_mode) ||
     248                        S_ISDIR(st.st_mode))
     249                    goto die_outfile;
    136250            }
    137251        }
     
    140254        outfile = bb_msg_standard_output;
    141255    }
    142 
    143256    if (skip) {
    144257        if (lseek(ifd, skip * ibs, SEEK_CUR) < 0) {
     
    146259                n = safe_read(ifd, ibuf, ibs);
    147260                if (n < 0)
    148                     bb_perror_msg_and_die("%s", infile);
     261                    goto die_infile;
    149262                if (n == 0)
    150263                    break;
     
    152265        }
    153266    }
    154 
    155267    if (seek) {
    156         if (lseek(ofd, seek * obs, SEEK_CUR) < 0) {
    157             bb_perror_msg_and_die("%s", outfile);
    158         }
    159     }
    160 
    161     while (in_full + in_part != count) {
    162         if (noerror) {
    163             /* Pre-zero the buffer when doing the noerror thing */
    164             memset(ibuf, '\0', ibs);
    165         }
    166 
     268        if (lseek(ofd, seek * obs, SEEK_CUR) < 0)
     269            goto die_outfile;
     270    }
     271
     272    while (!(flags & FLAG_COUNT) || (G.in_full + G.in_part != count)) {
     273        if (flags & FLAG_NOERROR) /* Pre-zero the buffer if conv=noerror */
     274            memset(ibuf, 0, ibs);
    167275        n = safe_read(ifd, ibuf, ibs);
    168         if (n == 0) {
     276        if (n == 0)
    169277            break;
    170         }
    171278        if (n < 0) {
    172             if (noerror) {
     279            if (flags & FLAG_NOERROR) {
    173280                n = ibs;
    174281                bb_perror_msg("%s", infile);
    175             } else {
    176                 bb_perror_msg_and_die("%s", infile);
    177             }
    178         }
    179         if ((size_t)n == ibs) {
    180             in_full++;
    181         } else {
    182             in_part++;
    183             if (sync_flag) {
     282            } else
     283                goto die_infile;
     284        }
     285        if ((size_t)n == ibs)
     286            G.in_full++;
     287        else {
     288            G.in_part++;
     289            if (flags & FLAG_SYNC) {
    184290                memset(ibuf + n, '\0', ibs - n);
    185291                n = ibs;
    186292            }
    187293        }
    188         if (twobufs_flag) {
     294        if (flags & FLAG_TWOBUFS) {
    189295            char *tmp = ibuf;
    190296            while (n) {
    191297                size_t d = obs - oc;
    192298
    193                 if (d > n) d = n;
     299                if (d > n)
     300                    d = n;
    194301                memcpy(obuf + oc, tmp, d);
    195302                n -= d;
     
    197304                oc += d;
    198305                if (oc == obs) {
    199                     if (bb_full_write(ofd, obuf, obs) < 0) {
    200                         bb_perror_msg_and_die("%s", outfile);
    201                     }
    202                     out_full++;
     306                    if (write_and_stats(ofd, obuf, obs, obs, outfile))
     307                        goto out_status;
    203308                    oc = 0;
    204309                }
    205310            }
    206         } else {
    207             if ((n = bb_full_write(ofd, ibuf, n)) < 0) {
    208                 bb_perror_msg_and_die("%s", outfile);
    209             }
    210             if (n == ibs) out_full++;
    211             else out_part++;
    212         }
    213     }
    214    
     311        } else if (write_and_stats(ofd, ibuf, n, obs, outfile))
     312            goto out_status;
     313    }
     314
    215315    if (ENABLE_FEATURE_DD_IBS_OBS && oc) {
    216         if (bb_full_write(ofd, obuf, oc) < 0) {
    217             bb_perror_msg_and_die("%s", outfile);
    218         }
    219         out_part++;
    220     }
    221     if (close (ifd) < 0) {
     316        w = full_write_or_warn(ofd, obuf, oc, outfile);
     317        if (w < 0) goto out_status;
     318        if (w > 0)
     319            G.out_part++;
     320    }
     321    if (close(ifd) < 0) {
     322 die_infile:
    222323        bb_perror_msg_and_die("%s", infile);
    223324    }
    224325
    225     if (close (ofd) < 0) {
     326    if (close(ofd) < 0) {
     327 die_outfile:
    226328        bb_perror_msg_and_die("%s", outfile);
    227329    }
    228 
     330 out_status:
    229331    dd_output_status(0);
    230332
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