X-Git-Url: https://git.wh0rd.org/?p=dump.git;a=blobdiff_plain;f=restore%2Ftape.c;h=344ca3b46fadd47079622653e5fcc07f19ac47d4;hp=8665e550cc174b56e641a08ec0546f730d05e288;hb=8b7882a833092b5974aa73e06b2e55bb9d1a9e99;hpb=109e9e1d1a904627eeae4d519a0f694795b2892c diff --git a/restore/tape.c b/restore/tape.c index 8665e55..344ca3b 100644 --- a/restore/tape.c +++ b/restore/tape.c @@ -46,9 +46,20 @@ #ifndef lint static const char rcsid[] = - "$Id: tape.c,v 1.21 2000/12/04 15:43:17 stelian Exp $"; + "$Id: tape.c,v 1.47 2001/09/12 10:21:49 stelian Exp $"; #endif /* not lint */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + #include #include #include @@ -56,37 +67,49 @@ static const char rcsid[] = #ifdef __linux__ #include +#include +#ifdef HAVE_EXT2FS_EXT2_FS_H +#include +#else #include +#endif +#include #include #else /* __linux__ */ #include #endif /* __linux__ */ #include -#include -#include -#include -#include -#include -#include -#include +#ifdef HAVE_ZLIB +#include +#endif /* HAVE_ZLIB */ -#ifdef __linux__ -#include -#endif +#ifdef HAVE_BZLIB +#include +#endif /* HAVE_BZLIB */ #include "restore.h" #include "extern.h" #include "pathnames.h" +#ifdef USE_QFA +int noresyncmesg = 0; +#endif /* USE_QFA */ static long fssize = MAXBSIZE; static int mt = -1; static int pipein = 0; +static int magtapein = 0; /* input is from magtape */ static char magtape[MAXPATHLEN]; static char magtapeprefix[MAXPATHLEN]; static int blkcnt; static int numtrec; -static char *tapebuf; +static char *tapebuf; /* input buffer for read */ +static int bufsize; /* buffer size without prefix */ +static char *tbufptr = NULL; /* active tape buffer */ +#if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) +static char *comprbuf; /* uncompress work buf */ +static size_t comprlen; /* size including prefix */ +#endif static union u_spcl endoftapemark; static long blksread; /* blocks read since last header */ static long tpblksread = 0; /* TP_BSIZE blocks read */ @@ -114,7 +137,9 @@ static int gethead __P((struct s_spcl *)); static void readtape __P((char *)); static void setdumpnum __P((void)); static u_int swabi __P((u_int)); +#if 0 static u_long swabl __P((u_long)); +#endif static u_char *swab64 __P((u_char *, int)); static u_char *swab32 __P((u_char *, int)); static u_char *swab16 __P((u_char *, int)); @@ -125,6 +150,19 @@ static void xtrlnkskip __P((char *, size_t)); static void xtrmap __P((char *, size_t)); static void xtrmapskip __P((char *, size_t)); static void xtrskip __P((char *, size_t)); +static void setmagtapein __P((void)); + +#if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) +static void newcomprbuf __P((int)); +static void readtape_set __P((char *)); +static void readtape_uncompr __P((char *)); +static void readtape_comprfile __P((char *)); +static void readtape_comprtape __P((char *)); +static char *decompress_tapebuf __P((struct tapebuf *, int)); +static void msg_read_error __P((char *)); +#endif +static int read_a_block __P((int, char *, size_t, long *)); +#define PREFIXSIZE sizeof(struct tapebuf) #define COMPARE_ONTHEFLY 1 @@ -138,7 +176,7 @@ static void xtrcmpskip __P((char *, size_t)); static int readmapflag; /* - * Set up an input source + * Set up an input source. This is called from main.c before setup() is. */ void setinput(char *source) @@ -190,16 +228,33 @@ newtapebuf(long size) static int tapebufsize = -1; ntrec = size; + bufsize = ntrec * TP_BSIZE; if (size <= tapebufsize) return; if (tapebuf != NULL) free(tapebuf); - tapebuf = malloc(size * TP_BSIZE); + tapebuf = malloc(size * TP_BSIZE + sizeof(struct tapebuf)); if (tapebuf == NULL) errx(1, "Cannot allocate space for tape buffer"); tapebufsize = size; } +#if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) +static void +newcomprbuf(int size) +{ + size_t buf_size = (size+1) * TP_BSIZE + sizeof(struct tapebuf); + if (buf_size <= comprlen) + return; + comprlen = buf_size; + if (comprbuf != NULL) + free(comprbuf); + comprbuf = malloc(comprlen); + if (comprbuf == NULL) + errx(1, "Cannot allocate space for decompress buffer"); +} +#endif /* HAVE_ZLIB || HAVE_BZLIB */ + /* * Verify that the tape drive can be accessed and * that it actually is a dump tape. @@ -207,10 +262,18 @@ newtapebuf(long size) void setup(void) { - int i, j, *ip; - struct stat stbuf; + int i, j, *ip, bot_code; + struct STAT stbuf; Vprintf(stdout, "Verify tape and initialize maps\n"); + if (bot_script) { + msg("Launching %s\n", bot_script); + bot_code = system_command(bot_script, magtape, 1); + if (bot_code != 0 && bot_code != 1) { + msg("Restore aborted by the beginning of tape script\n"); + exit(1); + } + } #ifdef RRESTORE if (host) mt = rmtopen(magtape, 0); @@ -219,14 +282,14 @@ setup(void) if (pipein) mt = 0; else - mt = open(magtape, O_RDONLY, 0); + mt = OPEN(magtape, O_RDONLY, 0); if (mt < 0) err(1, "%s", magtape); volno = 1; + setmagtapein(); setdumpnum(); FLUSHTAPEBUF(); - if (!pipein && !bflag) - findtapeblksize(); + findtapeblksize(); if (gethead(&spcl) == FAIL) { blkcnt--; /* push back this block */ blksread--; @@ -236,6 +299,15 @@ setup(void) errx(1, "Tape is not a dump tape"); fprintf(stderr, "Converting to new file system format.\n"); } + + if (zflag) { + fprintf(stderr, "Dump tape is compressed.\n"); +#if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) + newcomprbuf(ntrec); +#else + errx(1,"This restore version doesn't support decompression"); +#endif /* HAVE_ZLIB */ + } if (pipein) { endoftapemark.s_spcl.c_magic = cvtflag ? OFS_MAGIC : NFS_MAGIC; endoftapemark.s_spcl.c_type = TS_END; @@ -259,7 +331,7 @@ setup(void) } dumptime = spcl.c_ddate; dumpdate = spcl.c_date; - if (stat(".", &stbuf) < 0) + if (STAT(".", &stbuf) < 0) err(1, "cannot stat ."); if (stbuf.st_blksize > 0 && stbuf.st_blksize < TP_BSIZE ) fssize = TP_BSIZE; @@ -311,11 +383,12 @@ setup(void) void getvol(long nextvol) { - long newvol = 0, savecnt = 0, wantnext = 0, i; + long newvol = 0, wantnext = 0, i; + long saved_blksread = 0, saved_tpblksread = 0; union u_spcl tmpspcl; # define tmpbuf tmpspcl.s_spcl char buf[TP_BSIZE]; - int haderror = 0; + int haderror = 0, bot_code = 1; if (nextvol == 1) { tapesread = 0; @@ -328,7 +401,8 @@ getvol(long nextvol) return; goto gethdr; } - savecnt = blksread; + saved_blksread = blksread; + saved_tpblksread = tpblksread; again: if (pipein) exit(1); /* pipes do not get a second chance */ @@ -379,7 +453,15 @@ again: snprintf(magtape, MAXPATHLEN, "%s%03ld", magtapeprefix, newvol); magtape[MAXPATHLEN - 1] = '\0'; } - if (!Mflag || haderror) { + if (bot_script && !haderror) { + msg("Launching %s\n", bot_script); + bot_code = system_command(bot_script, magtape, newvol); + if (bot_code != 0 && bot_code != 1) { + msg("Restore aborted by the beginning of tape script\n"); + exit(1); + } + } + if (haderror || (bot_code && !Mflag)) { haderror = 0; fprintf(stderr, "Mount tape volume %ld\n", (long)newvol); fprintf(stderr, "Enter ``none'' if there are no more tapes\n"); @@ -393,8 +475,11 @@ again: return; } if (buf[0] != '\n') { - (void) strcpy(magtape, buf); - magtape[strlen(magtape) - 1] = '\0'; + char *pos; + (void) strncpy(magtape, buf, sizeof(magtape)); + magtape[sizeof(magtape) - 1] = '\0'; + if ((pos = strchr(magtape, '\n'))) + magtape[pos - magtape] = '\0'; } } #ifdef RRESTORE @@ -402,7 +487,7 @@ again: mt = rmtopen(magtape, 0); else #endif - mt = open(magtape, O_RDONLY, 0); + mt = OPEN(magtape, O_RDONLY, 0); if (mt == -1) { fprintf(stderr, "Cannot open %s\n", magtape); @@ -411,38 +496,41 @@ again: goto again; } gethdr: + setmagtapein(); volno = newvol; setdumpnum(); FLUSHTAPEBUF(); + findtapeblksize(); if (gethead(&tmpbuf) == FAIL) { Dprintf(stdout, "header read failed at %ld blocks\n", (long)blksread); fprintf(stderr, "tape is not dump tape\n"); volno = 0; haderror = 1; + blksread = saved_blksread; + tpblksread = saved_tpblksread; goto again; } if (tmpbuf.c_volume != volno) { fprintf(stderr, "Wrong volume (%d)\n", tmpbuf.c_volume); volno = 0; haderror = 1; + blksread = saved_blksread; + tpblksread = saved_tpblksread; goto again; } if (tmpbuf.c_date != dumpdate || tmpbuf.c_ddate != dumptime) { -#ifdef __linux__ fprintf(stderr, "Wrong dump date\n\tgot: %s", ctime4(&tmpbuf.c_date)); - fprintf(stderr, "\twanted: %s", ctime4(&dumpdate)); -#else - fprintf(stderr, "Wrong dump date\n\tgot: %s", - ctime(&tmpbuf.c_date)); fprintf(stderr, "\twanted: %s", ctime(&dumpdate)); -#endif volno = 0; haderror = 1; + blksread = saved_blksread; + tpblksread = saved_tpblksread; goto again; } tapesread |= 1 << volno; - blksread = savecnt; + blksread = saved_blksread; + tpblksread = saved_tpblksread; /* * If continuing from the previous volume, skip over any * blocks read already at the end of the previous volume. @@ -536,15 +624,9 @@ setdumpnum(void) void printdumpinfo(void) { -#ifdef __linux__ fprintf(stdout, "Dump date: %s", ctime4(&spcl.c_date)); fprintf(stdout, "Dumped from: %s", (spcl.c_ddate == 0) ? "the epoch\n" : ctime4(&spcl.c_ddate)); -#else - fprintf(stdout, "Dump date: %s", ctime(&spcl.c_date)); - fprintf(stdout, "Dumped from: %s", - (spcl.c_ddate == 0) ? "the epoch\n" : ctime(&spcl.c_ddate)); -#endif if (spcl.c_host[0] == '\0') return; fprintf(stdout, "Level %d dump of %s on %s:%s\n", @@ -682,7 +764,7 @@ extractfile(char *name) } if (uflag) (void)unlink(name); - if ((ofile = open(name, O_WRONLY | O_CREAT | O_TRUNC, + if ((ofile = OPEN(name, O_WRONLY | O_CREAT | O_TRUNC, 0666)) < 0) { warn("%s: cannot create file", name); skipfile(); @@ -790,8 +872,17 @@ loop: (*fill)((char *)buf, (size_t)(curblk * TP_BSIZE) + size); last_write_was_hole = 0; } + if (size > 0) { + fprintf(stderr, "Missing blocks at the end of %s, assuming hole\n", curfile.name); + while (size > 0) { + size_t skp = size > TP_BSIZE ? TP_BSIZE : size; + (*skip)(clearedbuf, skp); + size -= skp; + } + last_write_was_hole = 1; + } if (last_write_was_hole) { - ftruncate(ofile, origsize); + FTRUNCATE(ofile, origsize); } findinode(&spcl); gettingfile = 0; @@ -819,7 +910,7 @@ static void xtrskip(char *buf, size_t size) { - if (lseek(ofile, (off_t)size, SEEK_CUR) == -1) + if (LSEEK(ofile, (off_t)size, SEEK_CUR) == -1) err(1, "seek error extracting inode %lu, name %s\nlseek", (unsigned long)curfile.ino, curfile.name); } @@ -977,12 +1068,12 @@ int #else void #endif -cmpfiles(char *tapefile, char *diskfile, struct stat *sbuf_disk) +cmpfiles(char *tapefile, char *diskfile, struct STAT *sbuf_disk) { - struct stat sbuf_tape; + struct STAT sbuf_tape; int fd_tape, fd_disk; - if (stat(tapefile, &sbuf_tape) != 0) { + if (STAT(tapefile, &sbuf_tape) != 0) { panic("Can't lstat tmp file %s: %s\n", tapefile, strerror(errno)); compare_errors = 1; @@ -1000,11 +1091,11 @@ cmpfiles(char *tapefile, char *diskfile, struct stat *sbuf_disk) #endif } - if ((fd_tape = open(tapefile, O_RDONLY)) < 0) { + if ((fd_tape = OPEN(tapefile, O_RDONLY)) < 0) { panic("Can't open %s: %s\n", tapefile, strerror(errno)); compare_errors = 1; } - if ((fd_disk = open(diskfile, O_RDONLY)) < 0) { + if ((fd_disk = OPEN(diskfile, O_RDONLY)) < 0) { close(fd_tape); panic("Can't open %s: %s\n", diskfile, strerror(errno)); compare_errors = 1; @@ -1059,14 +1150,14 @@ void comparefile(char *name) { int mode; - struct stat sb; + struct STAT sb; int r; #if !COMPARE_ONTHEFLY static char *tmpfile = NULL; - struct stat stemp; + struct STAT stemp; #endif - if ((r = lstat(name, &sb)) != 0) { + if ((r = LSTAT(name, &sb)) != 0) { warn("%s: does not exist (%d)", name, r); compare_errors = 1; skipfile(); @@ -1159,7 +1250,7 @@ comparefile(char *name) case IFREG: #if COMPARE_ONTHEFLY - if ((ifile = open(name, O_RDONLY)) < 0) { + if ((ifile = OPEN(name, O_RDONLY)) < 0) { panic("Can't open %s: %s\n", name, strerror(errno)); skipfile(); compare_errors = 1; @@ -1185,11 +1276,11 @@ comparefile(char *name) snprintf(tmpfilename, sizeof(tmpfilename), "%s/restoreCXXXXXX", tmpdir); tmpfile = mktemp(&tmpfilename[0]); } - if ((stat(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) { + if ((STAT(tmpfile, &stemp) == 0) && (unlink(tmpfile) != 0)) { panic("cannot delete tmp file %s: %s\n", tmpfile, strerror(errno)); } - if ((ofile = creat(tmpfile, 0600)) < 0) { + if ((ofile = OPEN(tmpfile, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0) { panic("cannot create file temp file %s: %s\n", name, strerror(errno)); } @@ -1208,22 +1299,63 @@ comparefile(char *name) /* NOTREACHED */ } +#if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) +static void (*readtape_func)(char *) = readtape_set; + /* * Read TP_BSIZE blocks from the input. * Handle read errors, and end of media. + * Decompress compressed blocks. */ static void readtape(char *buf) +{ + (*readtape_func)(buf); /* call the actual processing routine */ +} + +/* + * Set function pointer for readtape() routine. zflag and magtapein must + * be correctly set before the first call to readtape(). + */ +static void +readtape_set(char *buf) +{ + if (!zflag) + readtape_func = readtape_uncompr; + else { + newcomprbuf(ntrec); + if (magtapein) + readtape_func = readtape_comprtape; + else + readtape_func = readtape_comprfile; + } + readtape(buf); +} + +#endif /* HAVE_ZLIB || HAVE_BZLIB */ + +/* + * This is the original readtape(), it's used for reading uncompressed input. + * Read TP_BSIZE blocks from the input. + * Handle read errors, and end of media. + */ +static void +#if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) +readtape_uncompr(char *buf) +#else +readtape(char *buf) +#endif { ssize_t rd, newvol, i; int cnt, seek_failed; if (blkcnt < numtrec) { - memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], TP_BSIZE); + memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE); blksread++; tpblksread++; return; } + tbufptr = tapebuf; for (i = 0; i < ntrec; i++) ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; if (numtrec == 0) @@ -1237,6 +1369,7 @@ getmore: else #endif i = read(mt, &tapebuf[rd], cnt); + /* * Check for mid-tape short read error. * If found, skip rest of buffer and start with the next. @@ -1297,10 +1430,14 @@ getmore: seek_failed = (rmtseek(i, 1) < 0); else #endif - seek_failed = (lseek(mt, i, SEEK_CUR) == (off_t)-1); + seek_failed = (LSEEK(mt, i, SEEK_CUR) == (off_t)-1); - if (seek_failed) - err(1, "continuation failed"); + if (seek_failed) { + warn("continuation failed"); + if (!yflag && !reply("assume end-of-tape and continue")) + exit(1); + i = 0; + } } /* * Handle end of tape. @@ -1322,36 +1459,451 @@ getmore: memmove(&tapebuf[rd], &endoftapemark, TP_BSIZE); } blkcnt = 0; - memmove(buf, &tapebuf[(blkcnt++ * TP_BSIZE)], TP_BSIZE); + memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE); blksread++; tpblksread++; } +#if defined(HAVE_ZLIB) || defined(HAVE_BZLIB) + +/* + * Read a compressed format block from a file or pipe and uncompress it. + * Attempt to handle read errors, and end of file. + */ static void -findtapeblksize(void) +readtape_comprfile(char *buf) { - register long i; + long rl, size, i, ret; + int newvol; + struct tapebuf *tpb; + if (blkcnt < numtrec) { + memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE); + blksread++; + tpblksread++; + return; + } + /* need to read the next block */ + tbufptr = tapebuf; for (i = 0; i < ntrec; i++) ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; + numtrec = ntrec; + tpb = (struct tapebuf *) tapebuf; + + /* read the block prefix */ + ret = read_a_block(mt, tapebuf, PREFIXSIZE, &rl); + + if (Vflag && (ret == 0 || rl < PREFIXSIZE || tpb->length == 0)) + ret = 0; + if (ret <= 0) + goto readerr; + + /* read the data */ + size = tpb->length; + if (size > bufsize) { + /* something's wrong */ + Vprintf(stdout, "Prefix size error, max size %d, got %ld\n", + bufsize, size); + size = bufsize; + tpb->length = bufsize; + } + ret = read_a_block(mt, tpb->buf, size, &rl); + if (ret <= 0) + goto readerr; + + tbufptr = decompress_tapebuf(tpb, rl + PREFIXSIZE); + if (tbufptr == NULL) { + msg_read_error("File decompression error while"); + if (!yflag && !reply("continue")) + exit(1); + memset(tapebuf, 0, bufsize); + tbufptr = tapebuf; + } + blkcnt = 0; + memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE); + blksread++; + tpblksread++; + return; + +readerr: + /* Errors while reading from a file or pipe are catastrophic. Since + * there are no block boundaries, it's impossible to bypass the + * block in error and find the start of the next block. + */ + if (ret == 0) { + /* It's possible to have multiple input files using -M + * and -f file1,file2... + */ + Vprintf(stdout, "End-of-File encountered\n"); + if (!pipein) { + newvol = volno + 1; + volno = 0; + numtrec = 0; + getvol(newvol); + readtape(buf); + return; + } + } + msg_read_error("Read error while"); + /* if (!yflag && !reply("continue")) */ + exit(1); +} + +/* + * Read compressed data from a tape and uncompress it. + * Handle read errors, and end of media. + * Since a tape consists of separate physical blocks, we try + * to recover from errors by repositioning the tape to the next + * block. + */ +static void +readtape_comprtape(char *buf) +{ + long rl, size, i; + int ret, newvol; + struct tapebuf *tpb; + struct mtop tcom; + + if (blkcnt < numtrec) { + memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE); + blksread++; + tpblksread++; + return; + } + /* need to read the next block */ + tbufptr = tapebuf; + for (i = 0; i < ntrec; i++) + ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; + numtrec = ntrec; + tpb = (struct tapebuf *) tapebuf; + + /* read the block */ + size = bufsize + PREFIXSIZE; + ret = read_a_block(mt, tapebuf, size, &rl); + if (ret <= 0) + goto readerr; + + tbufptr = decompress_tapebuf(tpb, rl); + if (tbufptr == NULL) { + msg_read_error("Tape decompression error while"); + if (!yflag && !reply("continue")) + exit(1); + memset(tapebuf, 0, PREFIXSIZE + bufsize); + tbufptr = tapebuf; + } + goto moverecord; + +readerr: + /* Handle errors: EOT switches to the next volume, other errors + * attempt to position the tape to the next block. + */ + if (ret == 0) { + Vprintf(stdout, "End-of-tape encountered\n"); + newvol = volno + 1; + volno = 0; + numtrec = 0; + getvol(newvol); + readtape(buf); + return; + } + + msg_read_error("Tape read error while"); + if (!yflag && !reply("continue")) + exit(1); + memset(tapebuf, 0, PREFIXSIZE + bufsize); + tbufptr = tapebuf; + #ifdef RRESTORE if (host) - i = rmtread(tapebuf, (size_t)(ntrec * TP_BSIZE)); + rl = rmtioctl(MTFSR, 1); else #endif - i = read(mt, tapebuf, (size_t)(ntrec * TP_BSIZE)); + { + tcom.mt_op = MTFSR; + tcom.mt_count = 1; + rl = ioctl(mt, MTIOCTOP, &tcom); + } - if (i <= 0) - err(1, "tape read error"); - if (i % TP_BSIZE != 0) - errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)", - (long)i, TP_BSIZE); + if (rl < 0) { + warn("continuation failed"); + if (!yflag && !reply("assume end-of-tape and continue")) + exit(1); + ret = 0; /* end of tape */ + goto readerr; + } + +moverecord: + blkcnt = 0; + memmove(buf, &tbufptr[(blkcnt++ * TP_BSIZE)], TP_BSIZE); + blksread++; + tpblksread++; +} + +/* + * Decompress a struct tapebuf into a buffer. readsize is the size read + * from the tape/file and is used for error messages. Returns a pointer + * to the location of the uncompressed buffer or NULL on errors. + * Adjust numtrec and complain for a short block. + */ +static char * +decompress_tapebuf(struct tapebuf *tpbin, int readsize) +{ + /* If zflag is on, all blocks have a struct tapebuf prefix */ + /* zflag gets set in setup() from the dump header */ + int cresult, blocklen; + unsigned long worklen; +#ifdef HAVE_BZLIB + unsigned int worklen2; +#endif + char *output = NULL,*reason = NULL, *lengtherr = NULL; + + /* build a length error message */ + blocklen = tpbin->length; + if (readsize < blocklen + PREFIXSIZE) + lengtherr = "short"; + else + if (readsize > blocklen + PREFIXSIZE) + lengtherr = "long"; + + worklen = comprlen; + cresult = 1; + if (tpbin->compressed) { + /* uncompress whatever we read, if it fails, complain later */ + if (tpbin->flags == COMPRESS_ZLIB) { +#ifndef HAVE_ZLIB + errx(1,"This restore version doesn't support zlib decompression"); +#else + cresult = uncompress(comprbuf, &worklen, + tpbin->buf, blocklen); + output = comprbuf; + switch (cresult) { + case Z_OK: + break; + case Z_MEM_ERROR: + reason = "not enough memory"; + break; + case Z_BUF_ERROR: + reason = "buffer too small"; + break; + case Z_DATA_ERROR: + reason = "data error"; + break; + default: + reason = "unknown"; + } + if (cresult == Z_OK) + cresult = 1; + else + cresult = 0; +#endif /* HAVE_ZLIB */ + } + if (tpbin->flags == COMPRESS_BZLIB) { +#ifndef HAVE_BZLIB + errx(1,"This restore version doesn't support bzlib decompression"); +#else + worklen2 = worklen; + cresult = BZ2_bzBuffToBuffDecompress( + comprbuf, &worklen2, + tpbin->buf, blocklen, 0, 0); + worklen = worklen2; + output = comprbuf; + switch (cresult) { + case BZ_OK: + break; + case BZ_MEM_ERROR: + reason = "not enough memory"; + break; + case BZ_OUTBUFF_FULL: + reason = "buffer too small"; + break; + case BZ_DATA_ERROR: + case BZ_DATA_ERROR_MAGIC: + case BZ_UNEXPECTED_EOF: + reason = "data error"; + break; + default: + reason = "unknown"; + } + if (cresult == BZ_OK) + cresult = 1; + else + cresult = 0; +#endif /* HAVE_BZLIB */ + } + } + else { + output = tpbin->buf; + worklen = blocklen; + } + if (cresult) { + numtrec = worklen / TP_BSIZE; + if (worklen % TP_BSIZE != 0) + reason = "length mismatch"; + } + if (reason) { + if (lengtherr) + fprintf(stderr, "%s compressed block: %d expected: %d\n", + lengtherr, readsize, tpbin->length + PREFIXSIZE); + fprintf(stderr, "decompression error, block %ld: %s\n", + tpblksread+1, reason); + if (!cresult) + output = NULL; + } + return output; +} + +/* + * Print an error message for a read error. + * This was exteracted from the original readtape(). + */ +static void +msg_read_error(char *m) +{ + switch (curfile.action) { + default: + fprintf(stderr, "%s trying to set up tape\n", m); + break; + case UNKNOWN: + fprintf(stderr, "%s trying to resynchronize\n", m); + break; + case USING: + fprintf(stderr, "%s restoring %s\n", m, curfile.name); + break; + case SKIP: + fprintf(stderr, "%s skipping over inode %lu\n", m, + (unsigned long)curfile.ino); + break; + } +} +#endif /* HAVE_ZLIB || HAVE_BZLIB */ + +/* + * Read the first block and get the blocksize from it. Test + * for a compressed dump tape/file. setup() will make the final + * determination by checking the compressed flag if gethead() + * finds a valid header. The test here is necessary to offset the buffer + * by the size of the compressed prefix. zflag is set here so that + * readtape_set can set the correct function pointer for readtape(). + * Note that the first block of each tape/file is not compressed + * and does not have a prefix. + */ +static void +findtapeblksize(void) +{ + long i; + size_t len; + struct tapebuf *tpb = (struct tapebuf *) tapebuf; + struct s_spcl *spclpt = (struct s_spcl *) tapebuf; + + for (i = 0; i < ntrec; i++) + ((struct s_spcl *)&tapebuf[i * TP_BSIZE])->c_magic = 0; + blkcnt = 0; + tbufptr = tapebuf; + /* + * For a pipe or file, read in the first record. For a tape, read + * the first block. + */ + len = magtapein ? ntrec * TP_BSIZE : TP_BSIZE; + + if (read_a_block(mt, tapebuf, len, &i) <= 0) + errx(1, "Tape read error on first record"); + + /* + * If the input is from a file or a pipe, we read TP_BSIZE + * bytes looking for a dump header. If the dump is compressed + * we need to read in the rest of the block, as determined + * by c_ntrec in the dump header. The first block of the + * dump is not compressed and does not have a prefix. + */ + if (!magtapein) { + if (spclpt->c_type == TS_TAPE + && spclpt->c_flags & DR_COMPRESSED) { + /* It's a compressed dump file, read in the */ + /* rest of the block based on spclpt->c_ntrec. */ + if (spclpt->c_ntrec > ntrec) + errx(1, "Tape blocksize is too large, use " + "\'-b %d\' ", spclpt->c_ntrec); + ntrec = spclpt->c_ntrec; + len = (ntrec - 1) * TP_BSIZE; + zflag = 1; + } + else { + /* read in the rest of the block based on bufsize */ + len = bufsize - TP_BSIZE; + } + if (read_a_block(mt, tapebuf+TP_BSIZE, len, &i) < 0 + || (i != len && i % TP_BSIZE != 0)) + errx(1,"Error reading dump file header"); + tbufptr = tapebuf; + numtrec = ntrec; + Vprintf(stdout, "Input block size is %ld\n", ntrec); + return; + } /* if (!magtapein) */ + + /* + * If the input is a tape, we tried to read ntrec * TP_BSIZE bytes. + * If the value of ntrec is too large, we read less than + * what we asked for; adjust the value of ntrec and test for + * a compressed dump tape. + */ + + if (i % TP_BSIZE != 0) { + /* may be old format compressed dump tape with a prefix */ + spclpt = (struct s_spcl *) tpb->buf; + if (i % TP_BSIZE == PREFIXSIZE + && tpb->compressed == 0 + && spclpt->c_type == TS_TAPE + && spclpt->c_flags & DR_COMPRESSED) { + zflag = 1; + tbufptr = tpb->buf; + if (tpb->length > bufsize) + errx(1, "Tape blocksize is too large, use " + "\'-b %d\' ", tpb->length / TP_BSIZE); + } + else + errx(1, "Tape block size (%ld) is not a multiple of dump block size (%d)", + i, TP_BSIZE); + } ntrec = i / TP_BSIZE; + if (spclpt->c_type == TS_TAPE) { + if (spclpt->c_flags & DR_COMPRESSED) + zflag = 1; + if (spclpt->c_ntrec > ntrec) + errx(1, "Tape blocksize is too large, use " + "\'-b %d\' ", spclpt->c_ntrec); + } numtrec = ntrec; Vprintf(stdout, "Tape block size is %ld\n", ntrec); } +/* + * Read a block of data handling all of the messy details. + */ +static int read_a_block(int fd, char *buf, size_t len, long *lengthread) +{ + long i = 1, size; + + size = len; + while (size > 0) { +#ifdef RRESTORE + if (host) + i = rmtread(buf, size); + else +#endif + i = read(fd, buf, size); + + if (i <= 0) + break; /* EOD or error */ + size -= i; + if (magtapein) + break; /* block at a time for mt */ + buf += i; + } + *lengthread = len - size; + return i; +} + void closemt(void) { @@ -1366,6 +1918,28 @@ closemt(void) (void) close(mt); } +static void +setmagtapein(void) { + struct mtget mt_stat; + static int done = 0; + if (done) + return; + done = 1; + if (!pipein) { + /* need to know if input is really from a tape */ +#ifdef RRESTORE + if (host) + magtapein = rmtioctl(MTNOP, 1) != -1; + else +#endif + magtapein = ioctl(mt, MTIOCGET, (char *)&mt_stat) == 0; + } + + Vprintf(stdout,"Input is from %s\n", + magtapein ? "tape" : + Vflag ? "multi-volume (no tape)" : "file/pipe"); +} + /* * Read the next block from the tape. * Check to see if it is one of several vintage headers. @@ -1525,7 +2099,7 @@ good: static void accthdr(struct s_spcl *header) { - static ino_t previno = 0x7fffffff; + static dump_ino_t previno = 0x7fffffff; static int prevtype; static long predict; long blks, i; @@ -1639,8 +2213,11 @@ findinode(struct s_spcl *header) } } while (header->c_type == TS_ADDR); if (skipcnt > 0) - fprintf(stderr, "resync restore, skipped %ld blocks\n", - skipcnt); +#ifdef USE_QFA + if (!noresyncmesg) +#endif + fprintf(stderr, "resync restore, skipped %ld blocks\n", + skipcnt); skipcnt = 0; } @@ -1786,9 +2363,80 @@ swabi(u_int x) return (x); } +#if 0 static u_long swabl(u_long x) { swabst((u_char *)"l", (u_char *)&x); return (x); } +#endif + +#ifdef USE_QFA +/* + * get the current position of the tape + */ +int +GetTapePos(long *pos) +{ + int err = 0; + + *pos = 0; + if (ioctl(mt, MTIOCPOS, pos) == -1) { + err = errno; + fprintf(stdout, "[%ld] error: %d (getting tapepos: %ld)\n", + (unsigned long)getpid(), err, *pos); + return err; + } + return err; +} + +typedef struct mt_pos { + short mt_op; + int mt_count; +} MTPosRec, *MTPosPtr; + +/* + * go to specified position on tape + */ +int +GotoTapePos(long pos) +{ + int err = 0; + struct mt_pos buf; + + buf.mt_op = MTSEEK; + buf.mt_count = pos; + if (ioctl(mt, MTIOCTOP, &buf) == -1) { + err = errno; + fprintf(stdout, "[%ld] error: %d (setting tapepos: %ld)\n", + (unsigned long)getpid(), err, pos); + return err; + } + return err; +} + +/* + * read next data from tape to re-sync + */ +void +ReReadFromTape(void) +{ + FLUSHTAPEBUF(); + noresyncmesg = 1; + if (gethead(&spcl) == FAIL) { +#ifdef DEBUG_QFA + fprintf(stdout, "DEBUG 1 gethead failed\n"); +#endif + } + findinode(&spcl); + noresyncmesg = 0; +} + +void +RequestVol(long tnum) +{ + FLUSHTAPEBUF(); + getvol(tnum); +} +#endif /* USE_QFA */