NetNews Usenet Archive 1992 #19

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Path: sparky!uunet!munnari.oz.au!network.ucsd.edu!mvb.saic.com!vmsnet-sources From: goathunter@wkuvx1.bitnet Newsgroups: vmsnet.sources Subject: Zip v1.9 & UnZip v5.0, part 14/22 Message-ID: <8009680@MVB.SAIC.COM> Date: Tue, 01 Sep 1992 22:53:02 GMT Organization: Western Kentucky University, Bowling Green, KY Lines: 1271 Approved: Mark.Berryman@Mvb.Saic.Com Submitted-by: goathunter@wkuvx1.bitnet Posting-number: Volume 3, Issue 136 Archive-name: zip_unzip/part14 -+-+-+-+-+-+-+-+ START OF PART 14 -+-+-+-+-+-+-+-+ Xfirst hyphen and go from there. It is also consistent with the behavior Xof the Unix command \fRnice\fP(1). X.PD X.SH EXAMPLES XTo get a basic, short-format listing of the complete contents of a ZIP`20 Xarchive `60`60storage.zip,'' with both header and totals lines, use only Xthe archive name as an argument to zipinfo: X.PP X.IP "\t\fIzipinfo\fP storage" X.PP XTo produce a basic, long-format listing (not verbose), including header and Xtotals lines, use \-l: X.PP X.IP "\t\fIzipinfo\fP \-l storage" X.PP XTo list the complete contents of the archive without header and totals Xlines, either negate the \-h and \-t options or else specify the contents Xexplicitly: X.PP X.IP "\t\fIzipinfo\fP \-\-h\-t storage" X.IP "\t\fIzipinfo\fP storage \e*" X.PP X(where the backslash is required only if the shell would otherwise expand Xthe `60*' wildcard, as in Unix when globbing is turned on--double quotes aro Vund Xthe asterisk would have worked as well). To turn off the totals line by Xdefault, use the environment variable (C shell is assumed here): X.PP X.IP "\tsetenv ZIPINFO \-\-t" X.IP "\t\fIzipinfo\fP storage" X.PP XTo get the full, short-format listing of the first example again, given Xthat the environment variable is set as in the previous example, it is Xnecessary to specify the \-s option explicitly, since the \-t Xoption by itself implies that ONLY the footer line is to be printed: X.PP X.IP "\tsetenv ZIPINFO \-\-t" X.IP "\t\fIzipinfo\fP \-t storage\t`5Bonly totals line`5D" X.IP "\t\fIzipinfo\fP \-st storage\t`5Bfull listing`5D" X.PP XThe \-s option, like \-m and \-l, includes headers and footers by default, Xunless otherwise specified. Since the environment variable specified no Xfooters and that has a higher precedence than the default behavior of \-s, Xan explicit \-t option was necessary to produce the full listing. Nothing`2 V0 Xwas indicated about the header, however, so the \-s option was sufficient. XNote that both the \-h and \-t options, when used by themselves or with Xeach other, override any default listing of member files; only the header Xand/or footer are printed. This behavior will be more`20 Xuseful when \fIZipInfo\fP accepts wildcards for the zipfile name; one Xmay then summarize the contents of all zipfiles with a single command. X.PP XTo list information on a single file within the archive, in medium format, Xspecify the filename explicitly: X.PP X.IP "\t\fIzipinfo\fP \-m storage unshrink.c" X.PP XThe specification of any member file, as in this example, will override Xthe default header and totals lines; only the single line of information Xabout the requested file will be printed. This is intuitively what one Xwould expect when requesting information about a single file. For multiple Xfiles, it is often useful to know the total compressed and uncompressed Xsize; in such cases \-t may be specified explicitly: X.PP X.IP "\t\fIzipinfo\fP \-mt storage ""*.`5Bch`5D Mak\e*" X.PP XFinally, to get maximal information about the ZIP archive, use the verbose`2 V0 Xoption. It is usually wise to pipe the output into a filter such as`20 X\fRmore\fP(1): X.PP X.IP "\t\fIzipinfo\fP \-v storage `7C more" X.PD X.SH TIPS XThe author finds it convenient to set up an alias `60`60ii'' for \fIZipInfo\ VfP Xon systems which allow aliases, or else to set up a batch file `60`60ii.bat' V' Xor to rename the executable to `60`60ii.exe'' on systems such as MS-DOS whic Vh Xhave no provision for aliases. The `60`60ii'' usage parallels the common X`60`60ll'' alias for long listings in Unix, and the similarity between the Xoutputs of the two commands was intentional. X.PD X.SH SEE ALSO Xfunzip(1), unzip(1), zip(1), zipcloak(1), zipnote(1), zipsplit(1) X.PD X.SH AUTHOR XGreg Roelofs (also known as Cave Newt). \fIZipInfo\fP is partly based on XS. H. Smith's \fRunzip\fP and contains pattern-matching code by J. Kercheval V, Xbut mostly it was written from scratch. The OS/2 extra-field code is by XKai Uwe Rommel. $ CALL UNPACK [.UNZIP50]ZIPINFO.1;1 1997710893 $ create 'f' X/*-------------------------------------------------------------------------- V- X X zipinfo.c X X This program reads all sorts of totally nifty information, including the X central directory stuff, from a ZIP archive ("zipfile" for short). It X started as just a testbed for fooling with zipfiles, but at this point X it's actually a moderately useful utility. It also became the basis X for the rewrite of unzip (3.16 -> 4.0), using the central directory for X processing rather than the individual (local) file headers. X X For myself, I find it convenient to define an alias "ii" (under Unix and X VMS) or to rename the executable to "ii.exe" (OS/2 and DOS). This nicely X complements my Unix long-listing "ll" alias (ls -lF), since zipinfo's de- X fault action is to produce a Unix-like listing of the archive's contents. X "ii zipfile" is easier to type than "zipinfo zipfile"... X X Another dandy product from your buddies at Newtware! X X -------------------------------------------------------------------------- V- X X To compile (partial instructions; some of this stuff doesn't exist yet): X X under Unix (cc): make zipinfo X X under MS-DOS (TurboC): make -fMKZIPINF.DOS (edit appropriately) X X under MS-DOS (MSC): make MKZIPINF.DOS X (or use Makefile if you have MSC 6.0: "nmake zi_dos") X X under OS/2 (MSC): make MKZIPINF.DOS (edit appropriately) X (or use Makefile if you have MSC 6.0: "nmake zi_os2") X X under Atari OS: beats me... X X under VMS: @MAKE_ZIPINFO (see also VMSNOTES) X ZIPINFO == $DISKNAME:`5BDIRECTORY`5DZIPINFO.EXE X X under Macintosh OS: who knows? X X -------------------------------------------------------------------------- V- X X Source: unzip50.zip (.tar.Z, etc.) for Unix, VMS, OS/2 and MS-DOS; see X `60Where' in source distribution for ftp, uucp and mail-server X sites. X Author: Greg Roelofs, roelofs@nas.nasa.gov, 23 August 1990 X Copyright: Portions copyright 1992 Greg Roelofs. Portions adapted from X unzip 3.1. SizeOfEAs() by Kai Uwe Rommel. X X -------------------------------------------------------------------------- V-*/ X X X X X#ifndef ZIPINFO X# define ZIPINFO /* needed for Unix permissions in non-Unix environments V */ X#endif /* !ZIPINFO */ X#include "unzip.h" X X#define VERSION "v1.0 of 21 August 92" X X#define LFLAG 3 /* for short "ls -l" type listing */ X X#define EAID 0x0009 /* OS/2 EA extra field ID */ Xtypedef struct `7B /* for OS/2 info in OS/2 and non-OS/2 environmen Vts */ X unsigned short nID; X unsigned short nSize; X ULONG lSize; X`7D EAHEADER, *PEAHEADER; X X X X X/**********************/ X/* Global Variables */ X/**********************/ X X#ifdef EBCDIC X int aflag=1; /* this is so you can read it on the screen */ X#else /* (basically, entire program is "unzip -c") */ X int aflag=0; X#endif Xint lflag=(-1); /* '-1slmv': listing format */ Xint hflag=0; /* '-h': header line */ Xint tflag=0; /* '-t': totals line */ X Xbyte *inbuf, *inptr; /* input buffer (any size is legal) and pointer */ Xint incnt; X Xint zipfd; /* zipfile file handle */ Xchar zipfn`5BFILNAMSIZ`5D; X Xchar local_hdr_sig`5B5`5D = "\120"; /* remaining signature bytes come lat Ver: */ Xchar central_hdr_sig`5B5`5D = "\120"; /* must initialize at runtime so zip Vinfo */ Xchar end_central_sig`5B5`5D = "\120"; /* executable won't look like a zipf Vile */ Xchar extd_local_sig`5B5`5D = "\120"; X Xcdir_file_hdr crec; /* used in zipinfo.c, misc.c */ Xlocal_file_hdr lrec; Xecdir_rec ecrec; Xstruct stat statbuf; /* used by main() */ X Xint process_all_files; Xlongint real_ecrec_offset, expect_ecrec_offset; Xlongint extra_bytes=0; /* used in zipinfo.c, misc.c */ Xlongint cur_zipfile_bufstart; /* find_end_central_dir, readbuf */ X Xmin_info info, *pInfo=(&info); X Xbyte *extra_field = NULL; /* used by VMS, Mac and OS/2 versions */ Xbyte *outbuf; /* buffer for rle look-back, zipfile comment V */ Xbyte *outout; /* scratch pad for ASCII-native trans */ X Xchar filename`5BFILNAMSIZ`5D; Xchar sig`5B5`5D; Xchar *fnames`5B2`5D = `7B"*", NULL`7D; /* default filenames vector */ Xchar **fnv = fnames; X Xstatic byte *hold; Xstatic longint ziplen; Xstatic UWORD hostnum; Xstatic UWORD methnum; Xstatic UWORD extnum; X Xchar *EndSigMsg = "\nwarning:\ X didn't find end-of-central-dir signature at end of central dir.\n"; Xchar *CentSigMsg = X "error: expected central file header signature not found (file #%u).\n"; Xchar *SeekMsg = X "error: attempt to seek before beginning of zipfile\n%s"; X X#ifdef VMS Xchar *ReportMsg = "\ X (please check that you have transferred or created the zipfile in the\n\ X appropriate BINARY mode--this includes ftp, Kermit, AND unzip'd zipfiles)\ Vn"; X#else /* !VMS */ Xchar *ReportMsg = "\ X (please check that you have transferred or created the zipfile in the\n\ X appropriate BINARY mode and that you have compiled unzip properly)\n"; X#endif /* ?VMS */ X X X X X X X/******************/ X/* Main program */ X/******************/ X Xmain(argc, argv) X int argc; X char *argv`5B`5D; X`7B X char *s; X int c, error=FALSE, negative=0; X int hflag_slmv=TRUE, hflag_1=FALSE; /* diff options => diff defaults V */ X int tflag_slm=TRUE, tflag_1v=FALSE; X int explicit_h=FALSE, explicit_t=FALSE; X X X X/*-------------------------------------------------------------------------- V- X Everybody is now "NOTINT16," but this is a nice little piece of code, so X just comment it out for future reference. :-) X -------------------------------------------------------------------------- V-*/ X X#if 0 X# ifndef KNOW_IT_WORKS /* define this to save space, if things already work V */ X# ifndef DOS_OS2 /* already works (no RISCy OS/2's yet...) */ X# ifndef NOTINT16 /* whole point is to see if this NEEDS defining */ X `7B X int error=0; X long testsig; X static char *mach_type`5B3`5D = `7B"big-endian", "structure-padding" V, X "big-endian and structure-padding"`7D; X X strcpy((char *)&testsig,"012"); X if (testsig != 0x00323130) X error = 1; X if (sizeof(cdir_file_hdr) != CREC_SIZE) X error += 2; X if (error--) X fprintf(stderr, "It appears that your machine is %s. If errors\ Vn\ Xoccur, please try recompiling with \"NOTINT16\" defined (read the\n\ XMakefile, or try \"make zipinfo\").\n\n", mach_type`5Berror`5D); X `7D X# endif /* !NOTINT16 */ X# endif /* !DOS_OS2 */ X# endif /* !KNOW_IT_WORKS */ X#endif /* 0 */ X X/*-------------------------------------------------------------------------- V- X Put environment-variable options into the queue, then rip through any X command-line options lurking about... X -------------------------------------------------------------------------- V-*/ X X envargs(&argc, &argv, ENV_ZIPINFO); X X while (--argc > 0 && (*++argv)`5B0`5D == '-') `7B X s = argv`5B0`5D + 1; X while ((c = *s++) != 0) `7B /* "!= 0": prevent Turbo C warning * V/ X switch (c) `7B X case '-': X ++negative; X break; X case '1': /* shortest listing: just filenames */ X if (negative) X lflag = -2, negative = 0; X else X lflag = 1; X break; X case 'h': /* header line */ X if (negative) X hflag_1 = hflag_slmv = FALSE, negative = 0; X else `7B X hflag_1 = hflag_slmv = explicit_h = TRUE; X if (lflag == -1) X lflag = 0; X `7D X break; X case 'l': /* longer form of "ls -l" type listing */ X if (negative) X lflag = -2, negative = 0; X else X lflag = 5; X break; X case 'm': /* medium form of "ls -l" type listing */ X if (negative) X lflag = -2, negative = 0; X else X lflag = 4; X break; X case 's': /* default: shorter "ls -l" type listing */ X if (negative) X lflag = -2, negative = 0; X else X lflag = 3; X break; X case 't': /* totals line */ X if (negative) X tflag_1v = tflag_slm = FALSE, negative = 0; X else `7B X tflag_1v = tflag_slm = explicit_t = TRUE; X if (lflag == -1) X lflag = 0; X `7D X break; X case 'v': /* turbo-verbose listing */ X if (negative) X lflag = -2, negative = 0; X else X lflag = 10; X break; X default: X error = TRUE; X break; X `7D X `7D X `7D X if ((argc-- == 0) `7C`7C error) X RETURN(usage(error)); X X if (argc != 0) X process_all_files = FALSE; X else X process_all_files = TRUE; /* for speed */ X X /* if no listing options given (or all negated), or if only -h/-t given X * with individual files specified, use default listing format */ X if ((lflag < 0) `7C`7C (!process_all_files && (lflag == 0))) X lflag = LFLAG; X X /* set header and totals flags to default or specified values */ X switch (lflag) `7B X case 0: /* 0: can only occur if either -t or -h explicitly given; V */ X case 1: /* therefore set both flags equal to normally false value V */ X hflag = hflag_1; X tflag = tflag_1v; X break; X case 3: X case 4: X case 5: X hflag = (!process_all_files && !explicit_h)? FALSE : hflag_slmv; X tflag = (!process_all_files && !explicit_t)? FALSE : tflag_slm; X break; X case 10: X hflag = hflag_slmv; X tflag = tflag_1v; X break; X `7D X X/*-------------------------------------------------------------------------- V- X Now get the zipfile name from the command line and see if it exists as a X regular (non-directory) file. If not, append the ".zip" suffix. We don V't X immediately check to see if this results in a good name, but we will do V so X later. In the meantime, see if there are any member filespecs on the co Vm- X mand line, and if so, set the filename pointer to point at them. X -------------------------------------------------------------------------- V-*/ X X strcpy(zipfn, *argv++); X if (stat(zipfn, &statbuf) `7C`7C (statbuf.st_mode & S_IFMT) == S_IFDIR) X strcat(zipfn, ZSUFX); X#if defined(UNIX) && !defined(VMS) /* Unix executables have no extension-- V */ X else if (statbuf.st_mode & S_IXUSR) /* might find zip, not zip.zip; etc V */ X fprintf(stderr, "\nnote: file `5B %s `5D may be an executable\n\n", V zipfn); X#endif /* UNIX && !VMS */ X X if (stat(zipfn, &statbuf)) `7B /* try again */ X fprintf(stderr, "error: can't find zipfile `5B %s `5D\n", zipfn); X RETURN(9); /* 9: file not found */ X `7D else X ziplen = statbuf.st_size; X X if (!process_all_files) X fnv = argv; X X/*-------------------------------------------------------------------------- V- X Okey dokey, we have everything we need to get started. Let's roll. X -------------------------------------------------------------------------- V-*/ X X inbuf = (byte *) (malloc(INBUFSIZ + 4)); /* 4 extra for hold`5B`5D (b Velow) */ X outbuf = (byte *) (malloc(OUTBUFSIZ + 1)); /* 1 extra for string termin V. */ X if (aflag) /* if need an ascebc scratch, */ X outout = (byte *) (malloc(OUTBUFSIZ)); X else /* allocate it... */ X outout = outbuf; /* else just point to outbuf */ X X if ((inbuf == NULL) `7C`7C (outbuf == NULL) `7C`7C (outout == NULL)) `7B X fprintf(stderr, "error: can't allocate zipinfo buffers\n"); X RETURN(4); /* 4-8: insufficient memory */ X `7D X hold = &inbuf`5BINBUFSIZ`5D; /* to check for boundary-spanning signat Vures */ X X RETURN(process_zipfile()); /* keep passing errors back... */ X X`7D /* end main() */ X X X X X X/**********************/ X/* Function usage() */ X/**********************/ X Xint usage(error) X int error; X`7B X FILE *usagefp; X X X/*-------------------------------------------------------------------------- V- X If user requested usage, send it to stdout; else send to stderr. X -------------------------------------------------------------------------- V-*/ X X if (error) X usagefp = (FILE *) stderr; X else X usagefp = (FILE *) stdout; X X fprintf(usagefp, "\ X ZipInfo: Zipfile Information Utility %s\n\ X (brought to you by Newtware, Inc., and the fine folks at Info-ZIP)\n\n\ X Usage: zipinfo `5B-1smlvht`5D file`5B.zip`5D `5Bfilespec...`5D\n", VERSI VON); X fprintf(usagefp, "\ X -1 list filenames only, one per line (useful for pipes)\n\ X -s list zipfile info in short Unix \"ls -l\" format: default\n\ X -m list zipfile info in medium Unix \"ls -l\" format\n\ X -l list zipfile info in long Unix \"ls -l\" format\n\ X -v list zipfile information in verbose, multi-page format\n\ X -h list header line\n\ X -t list totals for files listed or for all files\n"); X/* X -p disable automatic \"more\" function (for pipes) `5Bnot implemented` V5D\n"); X */ X X#ifdef VMS X fprintf(usagefp, "\nRemember that non-lowercase filespecs must be quoted V\ X in VMS (e.g., \"Makefile\").\n"); X#endif X X if (error) X return 10; /* 10: bad or illegal parameters specified */ X else X return 0; /* just wanted usage screen: no error */ X X`7D /* end function usage() */ X X X X X X/********************************/ X/* Function process_zipfile() */ X/********************************/ X Xint process_zipfile() /* return PK-type error code */ X`7B X int error=0, error_in_archive; X X X/*-------------------------------------------------------------------------- V- X Open the zipfile for reading and in BINARY mode to prevent CR/LF trans- X lation, which would corrupt the bitstreams. X -------------------------------------------------------------------------- V-*/ X X#ifdef VMS X if (check_format()) /* check for variable-length format */ X return 2; /* 2: error in zipfile */ X#endif /* VMS */ X X if (open_input_file()) /* this should never happen, given the */ X return 9; /* stat() test in main(), but... */ X X/*-------------------------------------------------------------------------- V- X Reconstruct the various PK signature strings, and find and process the X end-of-central-directory header. X -------------------------------------------------------------------------- V-*/ X X strcat(local_hdr_sig, LOCAL_HDR_SIG); X strcat(central_hdr_sig, CENTRAL_HDR_SIG); X strcat(end_central_sig, END_CENTRAL_SIG); X strcat(extd_local_sig, EXTD_LOCAL_SIG); X X if (find_end_central_dir()) `7B /* not found; nothing to do */ X close(zipfd); X return 2; /* 2: error in zipfile */ X `7D X X real_ecrec_offset = cur_zipfile_bufstart + (inptr-inbuf); X#ifdef TEST X printf("\n found end-of-central-dir signature at offset %ld (%.8lXh)\n" V, X real_ecrec_offset, real_ecrec_offset); X printf(" from beginning of file; offset %d (%.4Xh) within block\n", X inptr-inbuf, inptr-inbuf); X#endif X X /* sets expect_ecrec_offset: */ X if ((error_in_archive = process_end_central_dir()) > 1) `7B X close(zipfd); X return error_in_archive; X `7D X X/*-------------------------------------------------------------------------- V- X Test the end-of-central-directory info for incompatibilities (multi-disk X archives) or inconsistencies (missing or extra bytes in zipfile). X -------------------------------------------------------------------------- V-*/ X X if (ecrec.number_this_disk != ecrec.num_disk_with_start_central_dir) `7B X fprintf(stderr, "\n\ X Zipfile is part of a multi-disk archive, and this is not the disk on\ X which the central zipfile directory begins.\n"); X error_in_archive = 11; /* 11: no files found */ X `7D else `7B X if ((extra_bytes = real_ecrec_offset - expect_ecrec_offset) < 0) `7B X fprintf(stderr, "\nerror: missing %ld bytes in zipfile (\ Xattempting to process anyway)\n\n", -extra_bytes); X error_in_archive = 2; /* 2: (weak) error in zipfile */ X `7D else if (extra_bytes > 0) `7B X if ((ecrec.offset_start_central_directory == 0) && X (ecrec.size_central_directory != 0)) /* zip 1.5 -go bug */ X `7B X fprintf(stderr, "\nerror: NULL central directory offset (\ Xattempting to process anyway)\n\n"); X error_in_archive = 2; /* 2: (weak) error in zipfile */ X `7D else `7B X fprintf(stderr, "\nwarning: extra %ld bytes at beginning or V\ X within zipfile\n (attempting to process anyway)\n\n", extra_bytes) V; X error_in_archive = 1; /* 1: warning error */ X `7D X `7D X X /*---------------------------------------------------------------------- V- X Check for empty zipfile and exit now if so. X ---------------------------------------------------------------------- V-*/ X X if (expect_ecrec_offset == 0L && ecrec.size_central_directory == 0 V) `7B X printf("%sEmpty zipfile.\n", lflag>9 ? "\n " : ""); X close(zipfd); X return (error_in_archive > 1)? error_in_archive : 1; X `7D X X /*---------------------------------------------------------------------- V- X Compensate for missing or extra bytes, and seek to where the start X of central directory should be. If header not found, uncompensate X and try again (necessary for at least some Atari archives created X with STZIP, as well as archives created by J.H. Holm's ZIPSPLIT). X ---------------------------------------------------------------------- V-*/ X X LSEEK( ecrec.offset_start_central_directory ) X if ((readbuf(sig, 4) <= 0) `7C`7C strncmp(sig, central_hdr_sig, 4)) V `7B X longint tmp = extra_bytes; X X extra_bytes = 0; X LSEEK( ecrec.offset_start_central_directory ) X if ((readbuf(sig, 4) <= 0) `7C`7C strncmp(sig, central_hdr_sig, V 4)) `7B X fprintf(stderr, X "error: start of central directory not found; zipfile corrupt.\ Vn"); X fprintf(stderr, ReportMsg); X close(zipfd); X return 3; /* 3: severe error in zipfile */ X `7D X fprintf(stderr, "error: reported length of central directory is V \ X%d bytes too\n long (Atari STZIP zipfile? J.H. Holm ZIPSPLIT zipfile V?)\ X.\n Compensating...\n\n", -tmp); X error_in_archive = 2; /* 2: (weak) error in zipfile */ X `7D X X /*---------------------------------------------------------------------- V- X Seek to the start of the central directory one last time, since we X have just read the first entry's signature bytes; then do the centra Vl X directory and close the zipfile. X ---------------------------------------------------------------------- V-*/ X X LSEEK( ecrec.offset_start_central_directory ) X if ((error = process_central_dir()) > error_in_archive) X error_in_archive = error; /* don't overwrite stronger error * V/ X if (lflag > 9) X printf("\n"); X `7D X X close(zipfd); X return error_in_archive; X X`7D /* end function process_zipfile() */ X X X X X X/*************************************/ X/* Function find_end_central_dir() */ X/*************************************/ X Xint find_end_central_dir() /* return 0 if found, 1 otherwise */ X`7B X int i, numblks; X longint tail_len; X X X X/*-------------------------------------------------------------------------- V- X Treat case of short zipfile separately. X -------------------------------------------------------------------------- V-*/ X X if (ziplen <= INBUFSIZ) `7B X lseek(zipfd, 0L, SEEK_SET); X if ((incnt = read(zipfd,inbuf,(unsigned int)ziplen)) == (int)ziplen) X /* 'P' must be at least 22 bytes from end of zipfile */ X for (inptr = inbuf+(int)ziplen-22; inptr >= inbuf; --inptr) X if ((ascii_to_native(*inptr) == 'P') && X !strncmp((char *)inptr, end_central_sig, 4)) `7B X incnt -= inptr - inbuf; X return 0; /* found it! */ X `7D /* ...otherwise fall through & fail */ X X/*-------------------------------------------------------------------------- V- X Zipfile is longer than INBUFSIZ: may need to loop. Start with short X block at end of zipfile (if not TOO short). X -------------------------------------------------------------------------- V-*/ X X `7D else `7B X if ((tail_len = ziplen % INBUFSIZ) > ECREC_SIZE) `7B X cur_zipfile_bufstart = lseek(zipfd, ziplen-tail_len, SEEK_SET); X if ((incnt = read(zipfd,inbuf,(unsigned int)tail_len)) != X (int)tail_len) X goto fail; /* shut up; it's expedient. */ X X /* 'P' must be at least 22 bytes from end of zipfile */ X for (inptr = inbuf+(int)tail_len-22; inptr >= inbuf; --inptr) X if ((ascii_to_native(*inptr) == 'P') && X !strncmp((char *)inptr, end_central_sig, 4)) `7B X incnt -= inptr - inbuf; X return 0; /* found it */ X `7D /* ...otherwise search next block */ X /* sig may span block boundary: */ X strncpy((char *)hold, (char *)inbuf, 3); X `7D else X cur_zipfile_bufstart = ziplen - tail_len; X X /* X * Loop through blocks of zipfile data, starting at the end and goin Vg X * toward the beginning. Need only check last 65557 bytes of zipfil Ve: X * comment may be up to 65535 bytes long, end-of-central-directory r Vec- X * ord is 18 bytes (shouldn't hardcode this number, but what the hel Vl: X * already did so above (22=18+4)), and sig itself is 4 bytes. X *`20 X * zipinfo: check the whole file, just in case some transfer protoc Vol X * has appended a whole bunch of garbage at the end of the archive. X * X * =todo= ==done== ==rounding== =blksiz= V */ X numblks = (int) ((ziplen - tail_len + (INBUFSIZ-1)) / INBUFSIZ); X X for (i = 1; i <= numblks; ++i) `7B X cur_zipfile_bufstart -= INBUFSIZ; X lseek(zipfd, cur_zipfile_bufstart, SEEK_SET); X if ((incnt = read(zipfd,inbuf,INBUFSIZ)) != INBUFSIZ) X break; /* fall through and fail */ X X for (inptr = inbuf+INBUFSIZ-1; inptr >= inbuf; --inptr) X if ((ascii_to_native(*inptr) == 'P') && X !strncmp((char *)inptr, end_central_sig, 4)) `7B X incnt -= inptr - inbuf; X return 0; /* found it */ X `7D X /* sig may span block boundary: */ X strncpy((char *)hold, (char *)inbuf, 3); X `7D X X `7D /* end if (ziplen > INBUFSIZ) */ X X/*-------------------------------------------------------------------------- V- X Searched through whole region where signature should be without finding X it. Print informational message and die a horrible death. X -------------------------------------------------------------------------- V-*/ X Xfail: X X fprintf(stderr, "\n\ X %s:\n\n\ X End-of-central-directory signature not found. Either this file is not\ Vn\ X a zipfile, or it constitutes one disk of a multi-part archive. In the\ Vn\ X latter case the central directory and zipfile comment will be found on\ Vn\ X the last disk(s) of this archive.\n", zipfn); X return 1; /* failed */ X X`7D /* end function find_end_central_dir() */ X X X X X X/****************************************/ X/* Function process_end_central_dir() */ X/****************************************/ X Xint process_end_central_dir() /* return PK-type error code */ X`7B X ec_byte_rec byterec; X int error=0; X X X/*-------------------------------------------------------------------------- X Read the end-of-central-directory record and do any necessary machine- X type conversions (byte ordering, structure padding compensation) by X copying character array to struct. X -------------------------------------------------------------------------- V-*/ X X if (readbuf((char *)byterec, ECREC_SIZE+4) <= 0) X return 51; X X ecrec.number_this_disk = X makeword(&byterec`5BNUMBER_THIS_DISK`5D); X ecrec.num_disk_with_start_central_dir = X makeword(&byterec`5BNUM_DISK_WITH_START_CENTRAL_DIR`5D); X ecrec.num_entries_centrl_dir_ths_disk = X makeword(&byterec`5BNUM_ENTRIES_CENTRL_DIR_THS_DISK`5D); X ecrec.total_entries_central_dir = X makeword(&byterec`5BTOTAL_ENTRIES_CENTRAL_DIR`5D); X ecrec.size_central_directory = X makelong(&byterec`5BSIZE_CENTRAL_DIRECTORY`5D); X ecrec.offset_start_central_directory = X makelong(&byterec`5BOFFSET_START_CENTRAL_DIRECTORY`5D); X ecrec.zipfile_comment_length = X makeword(&byterec`5BZIPFILE_COMMENT_LENGTH`5D); X X expect_ecrec_offset = ecrec.offset_start_central_directory + X ecrec.size_central_directory; X X/*-------------------------------------------------------------------------- V- X Print out various interesting things about the zipfile. X -------------------------------------------------------------------------- V-*/ X X /* header fits on one line, for anything up to 10GB and 10000 files: */ X if (hflag) X printf((strlen(zipfn)<39)? "Archive: %s %ld bytes %d file%s\n" X : "Archive: %s %ld %d\n", zipfn, ziplen, X ecrec.total_entries_central_dir, X (ecrec.total_entries_central_dir==1)? "":"s"); X X /* verbose format */ X if (lflag > 9) `7B X printf("\nEnd-of-central-directory record:\n"); X printf("-------------------------------\n\n"); X X printf("\ X Actual offset of end-of-central-dir record: %9ld (%.8lXh)\n\ X Expected offset of end-of-central-dir record: %9ld (%.8lXh)\n\ X (based on the length of the central directory and its expected offset)\n\n V", X expect_ecrec_offset, expect_ecrec_offset, X real_ecrec_offset, real_ecrec_offset); X X if (ecrec.number_this_disk == 0) `7B X printf("\ X This zipfile constitutes the sole disk of a single-part archive; its\n\ X central directory contains %u %s. The central directory is %lu\n\ X (%.8lXh) bytes long, and its (expected) offset in bytes from the\n\ X beginning of the zipfile is %lu (%.8lXh).\n\n", X ecrec.total_entries_central_dir, X (ecrec.total_entries_central_dir == 1)? "entry" : "entries", X ecrec.size_central_directory, ecrec.size_central_directory, X ecrec.offset_start_central_directory, X ecrec.offset_start_central_directory); X `7D else `7B X printf("\ X This zipfile constitutes disk %u of a multi-part archive. The central\n\ X directory starts on disk %u; %u of its entries %s contained within\n\ X this zipfile, out of a total of %u %s. The entire central\n\ X directory is %lu (%.8lXh) bytes long, and its offset in bytes from\n\ X the beginning of the zipfile in which it begins is %lu (%.8lXh).\n\n", X ecrec.number_this_disk, X ecrec.num_disk_with_start_central_dir, X ecrec.num_entries_centrl_dir_ths_disk, X (ecrec.num_entries_centrl_dir_ths_disk == 1)? "is" : "are", X ecrec.total_entries_central_dir, X (ecrec.total_entries_central_dir == 1) ? "entry" : "entries", X ecrec.size_central_directory, ecrec.size_central_directory, X ecrec.offset_start_central_directory, X ecrec.offset_start_central_directory); X `7D X X /*---------------------------------------------------------------------- V- X Get the zipfile comment, if any, and print it out. (Comment may be X up to 64KB long. May the fleas of a thousand camels infest the arm- X pits of anyone who actually takes advantage of this fact.) X ---------------------------------------------------------------------- V-*/ X X if (!ecrec.zipfile_comment_length) X printf(" There is no zipfile comment.\n"); X else `7B X printf(" The zipfile comment is %u bytes long and contains the V following text:\n\n", X ecrec.zipfile_comment_length ); X printf("======================== zipfile comment begins ======== V==================\n"); X if (do_string(ecrec.zipfile_comment_length, DISPLAY)) X error = 1; /* 1: warning error */ X printf("\n========================= zipfile comment ends ======= V====================\n"); X if (error) X printf("\n The zipfile comment is truncated.\n"); X `7D /* endif (comment exists) */ X X `7D /* endif (verbose) */ X X return error; X X`7D /* end function process_end_central_dir() */ X X X X X X/************************************/ X/* Function process_central_dir() */ X/************************************/ X Xint process_central_dir() /* return PK-type error code */ X`7B X char **fnamev; X int do_this_file=FALSE, none_found=TRUE, error, error_in_archive=0; X UWORD j, members=0; X ULONG c=0L, uc=0L; X X X/*-------------------------------------------------------------------------- V- X Set file pointer to start of central directory, then loop through cen- X tral directory entries. Check that directory-entry signature bytes are X actually there (just a precaution), then process the entry. We know X the entire central directory is on this disk: we wouldn't have any of X this information unless the end-of-central-directory record was on this X disk, and we wouldn't have gotten to this routine unless this is also X the disk on which the central directory starts. In practice, this had X better be the *only* disk in the archive, but maybe someday we'll add X multi-disk support. X -------------------------------------------------------------------------- V-*/ X X pInfo->lcflag = 0; /* match(), do_string(): never TRUE in zipinfo */ X X for (j = 0; j < ecrec.total_entries_central_dir; ++j) `7B X if (readbuf(sig, 4) <= 0) X return 51; /* 51: unexpected EOF */ X if (strncmp(sig, central_hdr_sig, 4)) `7B /* just to make sure */ X fprintf(stderr, CentSigMsg, j); /* sig not found */ X return 3; /* 3: error in zipfile */ X `7D X if ((error = process_cdir_file_hdr()) != 0) X return error; /* only 51 (EOF) defined */ X if ((error = do_string(crec.filename_length, FILENAME)) != 0) `7B X error_in_archive = error; /* might be warning */ X if (error > 1) /* fatal */ X return error; X `7D X X if (!process_all_files) `7B /* check if specified on command line V */ X do_this_file = FALSE; X fnamev = fnv; /* don't destroy permanent filename ptr */ X for (--fnamev; *++fnamev; ) X if (match(filename, *fnamev)) `7B X do_this_file = TRUE; X none_found = FALSE; X break; /* found match, so stop looping */ X `7D X `7D X X /*---------------------------------------------------------------------- V- X If current file was specified on command line, or if no names were X specified, do the listing for this file. Otherwise, get rid of the X file comment and go back for the next file. X ---------------------------------------------------------------------- V-*/ X X if (process_all_files `7C`7C do_this_file) `7B X switch (lflag) `7B X case 1: X printf("%s\n", filename); X SKIP_(crec.extra_field_length) X SKIP_(crec.file_comment_length) X break; X X case 3: X case 4: X case 5: X if ((error = short_info()) != 0) `7B X error_in_archive = error; /* might be warning */ X if (error > 1) /* fatal */ X return error; X `7D X break; X X case 10: X#ifdef VMS /* GRR: FIX THIS (no pipes: add cbreak-style "more" function) V */ X printf("\nCentral directory entry #%d:\n", j); X#else /* !VMS */ X /* formfeed/CR for piping to "more": */ X printf("%s\nCentral directory entry #%d:\n", "\014", j); X#endif /* ?VMS */ X printf("---------------------------\n\n"); X X if ((error = long_info()) != 0) `7B X error_in_archive = error; /* might be warning */ X if (error > 1) /* fatal */ X return error; X `7D X break; X X default: X SKIP_(crec.extra_field_length) X SKIP_(crec.file_comment_length) X break; X X `7D /* end switch (lflag) */ X X uc += crec.uncompressed_size; X c += crec.compressed_size; X if (crec.general_purpose_bit_flag & 1) X c -= 12; /* if encrypted, don't count encryption header * V/ X ++members; X X `7D else `7B /* not listing */ X SKIP_(crec.extra_field_length) X SKIP_(crec.file_comment_length) X X `7D /* end if (list member?) */ X X `7D /* end for-loop (j: member files) */ X X/*-------------------------------------------------------------------------- V- X Double check that we're back at the end-of-central-directory record. X -------------------------------------------------------------------------- V-*/ X X readbuf(sig, 4); X if (strncmp(sig, end_central_sig, 4)) `7B /* just to make sure again V */ X fprintf(stderr, EndSigMsg); /* didn't find end-of-central-dir sig * V/ X error_in_archive = 1; /* 1: warning error */ X `7D X X/*-------------------------------------------------------------------------- V- X Check that we actually found requested files; if so, print totals. X -------------------------------------------------------------------------- V-*/ X X if (none_found && !process_all_files) `7B X fnamev = fnv; /* don't destroy permanent filename ptr */ X for (--fnamev; *++fnamev; ) X printf("zipinfo: %s not found in %s\n", *fnamev, zipfn); X `7D else if (tflag) X printf( X "%d file%s, %lu bytes uncompressed, %lu bytes compressed: %d%%\n" V, X members, (members==1)? "":"s", uc, c, (uc==0)? 0 : ((uc>2000000L)? X ((int)((uc-c)/(uc/1000L))+5)/10 : ((int)((1000L*(uc-c))/uc)+5)/10) V ); X X return error_in_archive; X X`7D /* end function process_central_dir() */ X X X X X X/**************************************/ X/* Function process_cdir_file_hdr() */ X/**************************************/ X Xint process_cdir_file_hdr() /* return PK-type error code */ X`7B X cdir_byte_hdr byterec; X X X/*-------------------------------------------------------------------------- V- X Read the next central directory entry and do any necessary machine-type X conversions (byte ordering, structure padding compensation--do so by X copying the data from the array into which it was read (byterec) to the X usable struct (crec)). X -------------------------------------------------------------------------- V-*/ X X if (readbuf((char *) byterec, CREC_SIZE) <= 0) X return 51; /* 51: unexpected EOF */ X X crec.version_made_by`5B0`5D = byterec`5BC_VERSION_MADE_BY_0`5D; X crec.version_made_by`5B1`5D = byterec`5BC_VERSION_MADE_BY_1`5D; X crec.version_needed_to_extract`5B0`5D = byterec`5BC_VERSION_NEEDED_TO_EX VTRACT_0`5D; X crec.version_needed_to_extract`5B1`5D = byterec`5BC_VERSION_NEEDED_TO_EX VTRACT_1`5D; X X crec.general_purpose_bit_flag = X makeword(&byterec`5BC_GENERAL_PURPOSE_BIT_FLAG`5D); X crec.compression_method = X makeword(&byterec`5BC_COMPRESSION_METHOD`5D); X crec.last_mod_file_time = X makeword(&byterec`5BC_LAST_MOD_FILE_TIME`5D); X crec.last_mod_file_date = X makeword(&byterec`5BC_LAST_MOD_FILE_DATE`5D); X crec.crc32 = X makelong(&byterec`5BC_CRC32`5D); X crec.compressed_size = X makelong(&byterec`5BC_COMPRESSED_SIZE`5D); X crec.uncompressed_size = X makelong(&byterec`5BC_UNCOMPRESSED_SIZE`5D); X crec.filename_length = X makeword(&byterec`5BC_FILENAME_LENGTH`5D); X crec.extra_field_length = X makeword(&byterec`5BC_EXTRA_FIELD_LENGTH`5D); X crec.file_comment_length = X makeword(&byterec`5BC_FILE_COMMENT_LENGTH`5D); X crec.disk_number_start = X makeword(&byterec`5BC_DISK_NUMBER_START`5D); X crec.internal_file_attributes = X makeword(&byterec`5BC_INTERNAL_FILE_ATTRIBUTES`5D); X crec.external_file_attributes = X makelong(&byterec`5BC_EXTERNAL_FILE_ATTRIBUTES`5D); /* LONG, not wor Vd! */ X crec.relative_offset_local_header = X makelong(&byterec`5BC_RELATIVE_OFFSET_LOCAL_HEADER`5D); X X return 0; X X`7D /* end function process_cdir_file_hdr() */ X X X X X/**************************/ X/* Function long_info() */ X/**************************/ X Xint long_info() /* return PK-type error code */ X`7B X int error, error_in_archive=0; X UWORD hostver, extver, xattr; X char workspace`5B12`5D, attribs`5B22`5D; X static char unkn`5B16`5D; X static char *os`5BNUM_HOSTS+1`5D = `7B"MS-DOS or OS/2 FAT", "Amiga", " VVAX VMS", X "Unix", "VM/CMS", "Atari ST", "OS/2 HPFS", "Macintosh" V, X "Z-System", "CP/M", "unknown" `7D; X static char *method`5BNUM_METHODS+1`5D = `7B"none (stored)", "shrunk", X "reduced (factor 1)", "reduced (factor 2)", X "reduced (factor 3)", "reduced (factor 4)", X "imploded", "tokenized", "deflated", unkn`7D; X static char *dtype`5B4`5D = `7B"normal", "maximum", "fastest", "undefi Vned"`7D; X X X/*-------------------------------------------------------------------------- V- X Print out various interesting things about the compressed file. X -------------------------------------------------------------------------- V-*/ X X hostnum = MIN(crec.version_made_by`5B1`5D, NUM_HOSTS); X hostver = crec.version_made_by`5B0`5D; X extnum = MIN(crec.version_needed_to_extract`5B1`5D, NUM_HOSTS); X extver = crec.version_needed_to_extract`5B0`5D; X methnum = MIN(crec.compression_method, NUM_METHODS); X if (methnum == NUM_METHODS) X sprintf(unkn, "unknown (%d)", crec.compression_method); X X printf(" %s\n", filename); X X printf("\n host operating system (created on): %s\n", X os`5Bhostnum`5D); X printf(" version of encoding software: %d.%d\n", X hostver/10, hostver%10); X printf(" minimum operating system compatibility required: %s\n", X os`5Bextnum`5D); X printf(" minimum software version required to extract: %d.%d\n", X extver/10, extver%10); X printf(" compression method: %s\n", X method`5Bmethnum`5D); X if (methnum == IMPLODED) `7B X printf(" size of sliding dictionary (implosion): %cK\n", X (crec.general_purpose_bit_flag & 2)? '8' : '4'); X printf(" number of Shannon-Fano trees (implosion): %c\n", X (crec.general_purpose_bit_flag & 4)? '3' : '2'); X `7D else if (methnum == DEFLATED) `7B X UWORD dnum=(crec.general_purpose_bit_flag>>1) & 3; X printf(" compression sub-type (deflation): %s\n", X dtype`5Bdnum`5D); X `7D X printf(" file security status: %sencrypted\ Vn", X (crec.general_purpose_bit_flag & 1)? "" : "not "); X printf(" extended local header: %s\n", X (crec.general_purpose_bit_flag & 8)? "yes" : "no"); X /* print upper 3 bits for amusement? */ X printf(" file last modified on: %s\n", X zipinfo_time(&crec.last_mod_file_date, &crec.last_mod_file_time)); X printf(" 32-bit CRC value (hex): %.8lx\n", X crec.crc32); X printf(" compressed size: %lu bytes\n" V, X crec.compressed_size); X printf(" uncompressed size: %lu bytes\n" V, X crec.uncompressed_size); X printf(" length of filename: %u character Vs\n", X crec.filename_length); X printf(" length of extra field: %u bytes\n", X crec.extra_field_length); X printf(" length of file comment: %u character Vs\n", X crec.file_comment_length); X printf(" disk number on which file begins: disk %u\n", X crec.disk_number_start); X printf(" apparent file type: %s\n", X (crec.internal_file_attributes & 1)? "text" : "binary"); X/* X printf(" external file attributes (hex): %.8lx\n", X crec.external_file_attributes); X */ X xattr = (UWORD) ((crec.external_file_attributes >> 16) & 0xFFFF); X if (hostnum == VMS_) `7B X char *p=attribs, *q=attribs+1; X int i, j, k; X X for (k = 0; k < 12; ++k) X workspace`5Bk`5D = 0; X if (xattr & S_IRUSR) X workspace`5B0`5D = 'R'; X if (xattr & S_IWUSR) `7B X workspace`5B1`5D = 'W'; X workspace`5B3`5D = 'D'; X `7D X if (xattr & S_IXUSR) X workspace`5B2`5D = 'E'; X if (xattr & S_IRGRP) +-+-+-+-+-+-+-+- END OF PART 14 +-+-+-+-+-+-+-+-