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/*---------------------------------------------------------------------------
zipinfo.c
This program reads all sorts of totally nifty information, including the
central directory stuff, from a ZIP archive ("zipfile" for short). It
started as just a testbed for fooling with zipfiles, but at this point
it's actually a moderately useful utility. It also became the basis
for the rewrite of unzip (3.16 -> 4.0), using the central directory for
processing rather than the individual (local) file headers.
For myself, I find it convenient to define an alias "ii" (under Unix and
VMS) or to rename the executable to "ii.exe" (OS/2 and DOS). This nicely
complements my Unix long-listing "ll" alias (ls -lF), since zipinfo's de-
fault action is to produce a Unix-like listing of the archive's contents.
"ii zipfile" is easier to type than "zipinfo zipfile"...
Another dandy product from your buddies at Newtware!
---------------------------------------------------------------------------
To compile (partial instructions; some of this stuff doesn't exist yet):
under Unix (cc): make zipinfo
under MS-DOS (TurboC): make -fMKZIPINF.DOS (edit appropriately)
under MS-DOS (MSC): make MKZIPINF.DOS
(or use Makefile if you have MSC 6.0: "nmake zi_dos")
under OS/2 (MSC): make MKZIPINF.DOS (edit appropriately)
(or use Makefile if you have MSC 6.0: "nmake zi_os2")
under Atari OS: beats me...
under VMS: @MAKE_ZIPINFO (see also VMSNOTES)
ZIPINFO == $DISKNAME:[DIRECTORY]ZIPINFO.EXE
under Macintosh OS: who knows?
---------------------------------------------------------------------------
Source: unz50p1.zip (.tar.Z, etc.) for Unix, VMS, OS/2 and MS-DOS; see
`Where' in source distribution for ftp, uucp and mail-server
sites.
Author: Greg Roelofs, roelofs@nas.nasa.gov, 23 August 1990
Copyright: Portions copyright 1992 Greg Roelofs. Portions adapted from
unzip 3.1. SizeOfEAs() by Kai Uwe Rommel.
---------------------------------------------------------------------------*/
#ifndef ZIPINFO
# define ZIPINFO /* needed for Unix permissions in non-Unix environments */
#endif /* !ZIPINFO */
#include "unzip.h"
#define VERSION "v1.0p1 of 10 January 1993"
#define LFLAG 3 /* for short "ls -l" type listing */
#define EAID 0x0009 /* OS/2 EA extra field ID */
typedef struct { /* for OS/2 info in OS/2 and non-OS/2 environments */
unsigned short nID;
unsigned short nSize;
ULONG lSize;
} EAHEADER, *PEAHEADER;
/**********************/
/* Global Variables */
/**********************/
#ifdef EBCDIC
int aflag=1; /* this is so you can read it on the screen */
#else /* (basically, entire program is "unzip -c") */
int aflag=0;
#endif
int lflag=(-1); /* '-1slmv': listing format */
int hflag=0; /* '-h': header line */
int tflag=0; /* '-t': totals line */
byte *inbuf, *inptr; /* input buffer (any size is legal) and pointer */
int incnt;
int zipfd; /* zipfile file handle */
char zipfn[FILNAMSIZ];
char local_hdr_sig[5] = "\120"; /* remaining signature bytes come later: */
char central_hdr_sig[5] = "\120"; /* must initialize at runtime so zipinfo */
char end_central_sig[5] = "\120"; /* executable won't look like a zipfile */
char extd_local_sig[5] = "\120";
cdir_file_hdr crec; /* used in zipinfo.c, misc.c */
local_file_hdr lrec;
ecdir_rec ecrec;
struct stat statbuf; /* used by main() */
int process_all_files;
longint real_ecrec_offset, expect_ecrec_offset;
longint extra_bytes=0; /* used in zipinfo.c, misc.c */
longint cur_zipfile_bufstart; /* find_end_central_dir, readbuf */
min_info info, *pInfo=(&info);
byte *extra_field = NULL; /* used by VMS, Mac and OS/2 versions */
byte *outbuf; /* buffer for rle look-back, zipfile comment */
byte *outout; /* scratch pad for ASCII-native trans */
char filename[FILNAMSIZ];
char sig[5];
char *fnames[2] = {"*", NULL}; /* default filenames vector */
char **fnv = fnames;
static byte *hold;
static longint ziplen;
static UWORD hostnum;
static UWORD methnum;
static UWORD extnum;
char *EndSigMsg = "\nwarning:\
didn't find end-of-central-dir signature at end of central dir.\n";
char *CentSigMsg =
"error: expected central file header signature not found (file #%u).\n";
char *SeekMsg =
"error: attempt to seek before beginning of zipfile\n%s";
#ifdef VMS
char *ReportMsg = "\
(please check that you have transferred or created the zipfile in the\n\
appropriate BINARY mode--this includes ftp, Kermit, AND unzip'd zipfiles)\n";
#else /* !VMS */
char *ReportMsg = "\
(please check that you have transferred or created the zipfile in the\n\
appropriate BINARY mode and that you have compiled unzip properly)\n";
#endif /* ?VMS */
/******************/
/* Main program */
/******************/
main(argc, argv)
int argc;
char *argv[];
{
char *s;
int c, error=FALSE, negative=0;
int hflag_slmv=TRUE, hflag_1=FALSE; /* diff options => diff defaults */
int tflag_slm=TRUE, tflag_1v=FALSE;
int explicit_h=FALSE, explicit_t=FALSE;
/*---------------------------------------------------------------------------
Everybody is now "NOTINT16," but this is a nice little piece of code, so
just comment it out for future reference. :-)
---------------------------------------------------------------------------*/
#if 0
# ifndef KNOW_IT_WORKS /* define this to save space, if things already work */
# ifndef DOS_OS2 /* already works (no RISCy OS/2's yet...) */
# ifndef NOTINT16 /* whole point is to see if this NEEDS defining */
{
int error=0;
long testsig;
static char *mach_type[3] = {"big-endian", "structure-padding",
"big-endian and structure-padding"};
strcpy((char *)&testsig,"012");
if (testsig != 0x00323130)
error = 1;
if (sizeof(cdir_file_hdr) != CREC_SIZE)
error += 2;
if (error--)
fprintf(stderr, "It appears that your machine is %s. If errors\n\
occur, please try recompiling with \"NOTINT16\" defined (read the\n\
Makefile, or try \"make zipinfo\").\n\n", mach_type[error]);
}
# endif /* !NOTINT16 */
# endif /* !DOS_OS2 */
# endif /* !KNOW_IT_WORKS */
#endif /* 0 */
/*---------------------------------------------------------------------------
Put environment-variable options into the queue, then rip through any
command-line options lurking about...
---------------------------------------------------------------------------*/
envargs(&argc, &argv, ENV_ZIPINFO);
while (--argc > 0 && (*++argv)[0] == '-') {
s = argv[0] + 1;
while ((c = *s++) != 0) { /* "!= 0": prevent Turbo C warning */
switch (c) {
case '-':
++negative;
break;
case '1': /* shortest listing: just filenames */
if (negative)
lflag = -2, negative = 0;
else
lflag = 1;
break;
case 'h': /* header line */
if (negative)
hflag_1 = hflag_slmv = FALSE, negative = 0;
else {
hflag_1 = hflag_slmv = explicit_h = TRUE;
if (lflag == -1)
lflag = 0;
}
break;
case 'l': /* longer form of "ls -l" type listing */
if (negative)
lflag = -2, negative = 0;
else
lflag = 5;
break;
case 'm': /* medium form of "ls -l" type listing */
if (negative)
lflag = -2, negative = 0;
else
lflag = 4;
break;
case 's': /* default: shorter "ls -l" type listing */
if (negative)
lflag = -2, negative = 0;
else
lflag = 3;
break;
case 't': /* totals line */
if (negative)
tflag_1v = tflag_slm = FALSE, negative = 0;
else {
tflag_1v = tflag_slm = explicit_t = TRUE;
if (lflag == -1)
lflag = 0;
}
break;
case 'v': /* turbo-verbose listing */
if (negative)
lflag = -2, negative = 0;
else
lflag = 10;
break;
default:
error = TRUE;
break;
}
}
}
if ((argc-- == 0) || error)
RETURN(usage(error));
if (argc != 0)
process_all_files = FALSE;
else
process_all_files = TRUE; /* for speed */
/* if no listing options given (or all negated), or if only -h/-t given
* with individual files specified, use default listing format */
if ((lflag < 0) || (!process_all_files && (lflag == 0)))
lflag = LFLAG;
/* set header and totals flags to default or specified values */
switch (lflag) {
case 0: /* 0: can only occur if either -t or -h explicitly given; */
case 1: /* therefore set both flags equal to normally false value */
hflag = hflag_1;
tflag = tflag_1v;
break;
case 3:
case 4:
case 5:
hflag = (!process_all_files && !explicit_h)? FALSE : hflag_slmv;
tflag = (!process_all_files && !explicit_t)? FALSE : tflag_slm;
break;
case 10:
hflag = hflag_slmv;
tflag = tflag_1v;
break;
}
/*---------------------------------------------------------------------------
Now get the zipfile name from the command line and see if it exists as a
regular (non-directory) file. If not, append the ".zip" suffix. We don't
immediately check to see if this results in a good name, but we will do so
later. In the meantime, see if there are any member filespecs on the com-
mand line, and if so, set the filename pointer to point at them.
---------------------------------------------------------------------------*/
strcpy(zipfn, *argv++);
if (stat(zipfn, &statbuf) || (statbuf.st_mode & S_IFMT) == S_IFDIR)
strcat(zipfn, ZSUFX);
#if defined(UNIX) && !defined(VMS) /* Unix executables have no extension-- */
else if (statbuf.st_mode & S_IXUSR) /* might find zip, not zip.zip; etc */
fprintf(stderr, "\nnote: file [ %s ] may be an executable\n\n", zipfn);
#endif /* UNIX && !VMS */
if (stat(zipfn, &statbuf)) { /* try again */
fprintf(stderr, "error: can't find zipfile [ %s ]\n", zipfn);
RETURN(9); /* 9: file not found */
} else
ziplen = statbuf.st_size;
if (!process_all_files)
fnv = argv;
/*---------------------------------------------------------------------------
Okey dokey, we have everything we need to get started. Let's roll.
---------------------------------------------------------------------------*/
inbuf = (byte *) (malloc(INBUFSIZ + 4)); /* 4 extra for hold[] (below) */
outbuf = (byte *) (malloc(OUTBUFSIZ + 1)); /* 1 extra for string termin. */
if (aflag) /* if need an ascebc scratch, */
outout = (byte *) (malloc(OUTBUFSIZ));
else /* allocate it... */
outout = outbuf; /* else just point to outbuf */
if ((inbuf == NULL) || (outbuf == NULL) || (outout == NULL)) {
fprintf(stderr, "error: can't allocate zipinfo buffers\n");
RETURN(4); /* 4-8: insufficient memory */
}
hold = &inbuf[INBUFSIZ]; /* to check for boundary-spanning signatures */
RETURN(process_zipfile()); /* keep passing errors back... */
} /* end main() */
/**********************/
/* Function usage() */
/**********************/
int usage(error)
int error;
{
FILE *usagefp;
/*---------------------------------------------------------------------------
If user requested usage, send it to stdout; else send to stderr.
---------------------------------------------------------------------------*/
if (error)
usagefp = (FILE *) stderr;
else
usagefp = (FILE *) stdout;
fprintf(usagefp, "\
ZipInfo: Zipfile Information Utility %s\n\
(brought to you by Newtware, Inc., and the fine folks at Info-ZIP)\n\n\
Usage: zipinfo [-1smlvht] file[.zip] [filespec...]\n", VERSION);
fprintf(usagefp, "\
-1 list filenames only, one per line (useful for pipes)\n\
-s list zipfile info in short Unix \"ls -l\" format: default\n\
-m list zipfile info in medium Unix \"ls -l\" format\n\
-l list zipfile info in long Unix \"ls -l\" format\n\
-v list zipfile information in verbose, multi-page format\n\
-h list header line\n\
-t list totals for files listed or for all files\n");
/*
-p disable automatic \"more\" function (for pipes) [not implemented]\n");
*/
#ifdef VMS
fprintf(usagefp, "\nRemember that non-lowercase filespecs must be quoted\
in VMS (e.g., \"Makefile\").\n");
#endif
if (error)
return 10; /* 10: bad or illegal parameters specified */
else
return 0; /* just wanted usage screen: no error */
} /* end function usage() */
/********************************/
/* Function process_zipfile() */
/********************************/
int process_zipfile() /* return PK-type error code */
{
int error=0, error_in_archive;
/*---------------------------------------------------------------------------
Open the zipfile for reading and in BINARY mode to prevent CR/LF trans-
lation, which would corrupt the bitstreams.
---------------------------------------------------------------------------*/
#ifdef VMS
if (check_format()) /* check for variable-length format */
return 2; /* 2: error in zipfile */
#endif /* VMS */
if (open_input_file()) /* this should never happen, given the */
return 9; /* stat() test in main(), but... */
/*---------------------------------------------------------------------------
Reconstruct the various PK signature strings, and find and process the
end-of-central-directory header.
---------------------------------------------------------------------------*/
strcat(local_hdr_sig, LOCAL_HDR_SIG);
strcat(central_hdr_sig, CENTRAL_HDR_SIG);
strcat(end_central_sig, END_CENTRAL_SIG);
strcat(extd_local_sig, EXTD_LOCAL_SIG);
if (find_end_central_dir()) { /* not found; nothing to do */
close(zipfd);
return 2; /* 2: error in zipfile */
}
real_ecrec_offset = cur_zipfile_bufstart + (inptr-inbuf);
#ifdef TEST
printf("\n found end-of-central-dir signature at offset %ld (%.8lXh)\n",
real_ecrec_offset, real_ecrec_offset);
printf(" from beginning of file; offset %d (%.4Xh) within block\n",
inptr-inbuf, inptr-inbuf);
#endif
/* sets expect_ecrec_offset: */
if ((error_in_archive = process_end_central_dir()) > 1) {
close(zipfd);
return error_in_archive;
}
/*---------------------------------------------------------------------------
Test the end-of-central-directory info for incompatibilities (multi-disk
archives) or inconsistencies (missing or extra bytes in zipfile).
---------------------------------------------------------------------------*/
if (ecrec.number_this_disk != ecrec.num_disk_with_start_central_dir) {
fprintf(stderr, "\n\
Zipfile is part of a multi-disk archive, and this is not the disk on\
which the central zipfile directory begins.\n");
error_in_archive = 11; /* 11: no files found */
} else {
if ((extra_bytes = real_ecrec_offset - expect_ecrec_offset) < 0) {
fprintf(stderr, "\nerror: missing %ld bytes in zipfile (\
attempting to process anyway)\n\n", -extra_bytes);
error_in_archive = 2; /* 2: (weak) error in zipfile */
} else if (extra_bytes > 0) {
if ((ecrec.offset_start_central_directory == 0) &&
(ecrec.size_central_directory != 0)) /* zip 1.5 -go bug */
{
fprintf(stderr, "\nerror: NULL central directory offset (\
attempting to process anyway)\n\n");
error_in_archive = 2; /* 2: (weak) error in zipfile */
} else {
fprintf(stderr, "\nwarning: extra %ld bytes at beginning or\
within zipfile\n (attempting to process anyway)\n\n", extra_bytes);
error_in_archive = 1; /* 1: warning error */
}
}
/*-----------------------------------------------------------------------
Check for empty zipfile and exit now if so.
-----------------------------------------------------------------------*/
if (expect_ecrec_offset == 0L && ecrec.size_central_directory == 0) {
printf("%sEmpty zipfile.\n", lflag>9 ? "\n " : "");
close(zipfd);
return (error_in_archive > 1)? error_in_archive : 1;
}
/*-----------------------------------------------------------------------
Compensate for missing or extra bytes, and seek to where the start
of central directory should be. If header not found, uncompensate
and try again (necessary for at least some Atari archives created
with STZIP, as well as archives created by J.H. Holm's ZIPSPLIT).
-----------------------------------------------------------------------*/
LSEEK( ecrec.offset_start_central_directory )
if ((readbuf(sig, 4) <= 0) || strncmp(sig, central_hdr_sig, 4)) {
longint tmp = extra_bytes;
extra_bytes = 0;
LSEEK( ecrec.offset_start_central_directory )
if ((readbuf(sig, 4) <= 0) || strncmp(sig, central_hdr_sig, 4)) {
fprintf(stderr,
"error: start of central directory not found; zipfile corrupt.\n");
fprintf(stderr, ReportMsg);
close(zipfd);
return 3; /* 3: severe error in zipfile */
}
fprintf(stderr, "error: reported length of central directory is \
%d bytes too\n long (Atari STZIP zipfile? J.H. Holm ZIPSPLIT zipfile?)\
.\n Compensating...\n\n", -tmp);
error_in_archive = 2; /* 2: (weak) error in zipfile */
}
/*-----------------------------------------------------------------------
Seek to the start of the central directory one last time, since we
have just read the first entry's signature bytes; then do the central
directory and close the zipfile.
-----------------------------------------------------------------------*/
LSEEK( ecrec.offset_start_central_directory )
if ((error = process_central_dir()) > error_in_archive)
error_in_archive = error; /* don't overwrite stronger error */
if (lflag > 9)
printf("\n");
}
close(zipfd);
return error_in_archive;
} /* end function process_zipfile() */
/*************************************/
/* Function find_end_central_dir() */
/*************************************/
int find_end_central_dir() /* return 0 if found, 1 otherwise */
{
int i, numblks;
longint tail_len;
/*---------------------------------------------------------------------------
Treat case of short zipfile separately.
---------------------------------------------------------------------------*/
if (ziplen <= INBUFSIZ) {
lseek(zipfd, 0L, SEEK_SET);
if ((incnt = read(zipfd,inbuf,(unsigned int)ziplen)) == (int)ziplen)
/* 'P' must be at least 22 bytes from end of zipfile */
for (inptr = inbuf+(int)ziplen-22; inptr >= inbuf; --inptr)
if ((ascii_to_native(*inptr) == 'P') &&
!strncmp((char *)inptr, end_central_sig, 4)) {
incnt -= inptr - inbuf;
return 0; /* found it! */
} /* ...otherwise fall through & fail */
/*---------------------------------------------------------------------------
Zipfile is longer than INBUFSIZ: may need to loop. Start with short
block at end of zipfile (if not TOO short).
---------------------------------------------------------------------------*/
} else {
if ((tail_len = ziplen % INBUFSIZ) > ECREC_SIZE) {
cur_zipfile_bufstart = lseek(zipfd, ziplen-tail_len, SEEK_SET);
if ((incnt = read(zipfd,inbuf,(unsigned int)tail_len)) !=
(int)tail_len)
goto fail; /* shut up; it's expedient. */
/* 'P' must be at least 22 bytes from end of zipfile */
for (inptr = inbuf+(int)tail_len-22; inptr >= inbuf; --inptr)
if ((ascii_to_native(*inptr) == 'P') &&
!strncmp((char *)inptr, end_central_sig, 4)) {
incnt -= inptr - inbuf;
return 0; /* found it */
} /* ...otherwise search next block */
/* sig may span block boundary: */
strncpy((char *)hold, (char *)inbuf, 3);
} else
cur_zipfile_bufstart = ziplen - tail_len;
/*
* Loop through blocks of zipfile data, starting at the end and going
* toward the beginning. Need only check last 65557 bytes of zipfile:
* comment may be up to 65535 bytes long, end-of-central-directory rec-
* ord is 18 bytes (shouldn't hardcode this number, but what the hell:
* already did so above (22=18+4)), and sig itself is 4 bytes.
*
* zipinfo: check the whole file, just in case some transfer protocol
* has appended a whole bunch of garbage at the end of the archive.
*
* =todo= ==done== ==rounding== =blksiz= */
numblks = (int) ((ziplen - tail_len + (INBUFSIZ-1)) / INBUFSIZ);
for (i = 1; i <= numblks; ++i) {
cur_zipfile_bufstart -= INBUFSIZ;
lseek(zipfd, cur_zipfile_bufstart, SEEK_SET);
if ((incnt = read(zipfd,inbuf,INBUFSIZ)) != INBUFSIZ)
break; /* fall through and fail */
for (inptr = inbuf+INBUFSIZ-1; inptr >= inbuf; --inptr)
if ((ascii_to_native(*inptr) == 'P') &&
!strncmp((char *)inptr, end_central_sig, 4)) {
incnt -= inptr - inbuf;
return 0; /* found it */
}
/* sig may span block boundary: */
strncpy((char *)hold, (char *)inbuf, 3);
}
} /* end if (ziplen > INBUFSIZ) */
/*---------------------------------------------------------------------------
Searched through whole region where signature should be without finding
it. Print informational message and die a horrible death.
---------------------------------------------------------------------------*/
fail:
fprintf(stderr, "\n\
%s:\n\n\
End-of-central-directory signature not found. Either this file is not\n\
a zipfile, or it constitutes one disk of a multi-part archive. In the\n\
latter case the central directory and zipfile comment will be found on\n\
the last disk(s) of this archive.\n", zipfn);
return 1; /* failed */
} /* end function find_end_central_dir() */
/****************************************/
/* Function process_end_central_dir() */
/****************************************/
int process_end_central_dir() /* return PK-type error code */
{
ec_byte_rec byterec;
int error=0;
/*--------------------------------------------------------------------------
Read the end-of-central-directory record and do any necessary machine-
type conversions (byte ordering, structure padding compensation) by
copying character array to struct.
---------------------------------------------------------------------------*/
if (readbuf((char *)byterec, ECREC_SIZE+4) <= 0)
return 51;
ecrec.number_this_disk =
makeword(&byterec[NUMBER_THIS_DISK]);
ecrec.num_disk_with_start_central_dir =
makeword(&byterec[NUM_DISK_WITH_START_CENTRAL_DIR]);
ecrec.num_entries_centrl_dir_ths_disk =
makeword(&byterec[NUM_ENTRIES_CENTRL_DIR_THS_DISK]);
ecrec.total_entries_central_dir =
makeword(&byterec[TOTAL_ENTRIES_CENTRAL_DIR]);
ecrec.size_central_directory =
makelong(&byterec[SIZE_CENTRAL_DIRECTORY]);
ecrec.offset_start_central_directory =
makelong(&byterec[OFFSET_START_CENTRAL_DIRECTORY]);
ecrec.zipfile_comment_length =
makeword(&byterec[ZIPFILE_COMMENT_LENGTH]);
expect_ecrec_offset = ecrec.offset_start_central_directory +
ecrec.size_central_directory;
/*---------------------------------------------------------------------------
Print out various interesting things about the zipfile.
---------------------------------------------------------------------------*/
/* header fits on one line, for anything up to 10GB and 10000 files: */
if (hflag)
printf((strlen(zipfn)<39)? "Archive: %s %ld bytes %d file%s\n"
: "Archive: %s %ld %d\n", zipfn, ziplen,
ecrec.total_entries_central_dir,
(ecrec.total_entries_central_dir==1)? "":"s");
/* verbose format */
if (lflag > 9) {
printf("\nEnd-of-central-directory record:\n");
printf("-------------------------------\n\n");
printf("\
Actual offset of end-of-central-dir record: %9ld (%.8lXh)\n\
Expected offset of end-of-central-dir record: %9ld (%.8lXh)\n\
(based on the length of the central directory and its expected offset)\n\n",
real_ecrec_offset, real_ecrec_offset,
expect_ecrec_offset, expect_ecrec_offset);
if (ecrec.number_this_disk == 0) {
printf("\
This zipfile constitutes the sole disk of a single-part archive; its\n\
central directory contains %u %s. The central directory is %lu\n\
(%.8lXh) bytes long, and its (expected) offset in bytes from the\n\
beginning of the zipfile is %lu (%.8lXh).\n\n",
ecrec.total_entries_central_dir,
(ecrec.total_entries_central_dir == 1)? "entry" : "entries",
ecrec.size_central_directory, ecrec.size_central_directory,
ecrec.offset_start_central_directory,
ecrec.offset_start_central_directory);
} else {
printf("\
This zipfile constitutes disk %u of a multi-part archive. The central\n\
directory starts on disk %u; %u of its entries %s contained within\n\
this zipfile, out of a total of %u %s. The entire central\n\
directory is %lu (%.8lXh) bytes long, and its offset in bytes from\n\
the beginning of the zipfile in which it begins is %lu (%.8lXh).\n\n",
ecrec.number_this_disk,
ecrec.num_disk_with_start_central_dir,
ecrec.num_entries_centrl_dir_ths_disk,
(ecrec.num_entries_centrl_dir_ths_disk == 1)? "is" : "are",
ecrec.total_entries_central_dir,
(ecrec.total_entries_central_dir == 1) ? "entry" : "entries",
ecrec.size_central_directory, ecrec.size_central_directory,
ecrec.offset_start_central_directory,
ecrec.offset_start_central_directory);
}
/*-----------------------------------------------------------------------
Get the zipfile comment, if any, and print it out. (Comment may be
up to 64KB long. May the fleas of a thousand camels infest the arm-
pits of anyone who actually takes advantage of this fact.)
-----------------------------------------------------------------------*/
if (!ecrec.zipfile_comment_length)
printf(" There is no zipfile comment.\n");
else {
printf(" The zipfile comment is %u bytes long and contains the following text:\n\n",
ecrec.zipfile_comment_length );
printf("======================== zipfile comment begins ==========================\n");
if (do_string(ecrec.zipfile_comment_length, DISPLAY))
error = 1; /* 1: warning error */
printf("\n========================= zipfile comment ends ===========================\n");
if (error)
printf("\n The zipfile comment is truncated.\n");
} /* endif (comment exists) */
} /* endif (verbose) */
return error;
} /* end function process_end_central_dir() */
/************************************/
/* Function process_central_dir() */
/************************************/
int process_central_dir() /* return PK-type error code */
{
char **fnamev;
int do_this_file=FALSE, none_found=TRUE, error, error_in_archive=0;
UWORD j, members=0;
ULONG c=0L, uc=0L;
/*---------------------------------------------------------------------------
Set file pointer to start of central directory, then loop through cen-
tral directory entries. Check that directory-entry signature bytes are
actually there (just a precaution), then process the entry. We know
the entire central directory is on this disk: we wouldn't have any of
this information unless the end-of-central-directory record was on this
disk, and we wouldn't have gotten to this routine unless this is also
the disk on which the central directory starts. In practice, this had
better be the *only* disk in the archive, but maybe someday we'll add
multi-disk support.
---------------------------------------------------------------------------*/
pInfo->lcflag = 0; /* match(), do_string(): never TRUE in zipinfo */
for (j = 0; j < ecrec.total_entries_central_dir; ++j) {
if (readbuf(sig, 4) <= 0)
return 51; /* 51: unexpected EOF */
if (strncmp(sig, central_hdr_sig, 4)) { /* just to make sure */
fprintf(stderr, CentSigMsg, j); /* sig not found */
return 3; /* 3: error in zipfile */
}
if ((error = process_cdir_file_hdr()) != 0)
return error; /* only 51 (EOF) defined */
if ((error = do_string(crec.filename_length, FILENAME)) != 0) {
error_in_archive = error; /* might be warning */
if (error > 1) /* fatal */
return error;
}
if (!process_all_files) { /* check if specified on command line */
do_this_file = FALSE;
fnamev = fnv; /* don't destroy permanent filename ptr */
for (--fnamev; *++fnamev; )
if (match(filename, *fnamev)) {
do_this_file = TRUE;
none_found = FALSE;
break; /* found match, so stop looping */
}
}
/*-----------------------------------------------------------------------
If current file was specified on command line, or if no names were
specified, do the listing for this file. Otherwise, get rid of the
file comment and go back for the next file.
-----------------------------------------------------------------------*/
if (process_all_files || do_this_file) {
switch (lflag) {
case 1:
printf("%s\n", filename);
SKIP_(crec.extra_field_length)
SKIP_(crec.file_comment_length)
break;
case 3:
case 4:
case 5:
if ((error = short_info()) != 0) {
error_in_archive = error; /* might be warning */
if (error > 1) /* fatal */
return error;
}
break;
case 10:
#ifdef VMS /* GRR: FIX THIS (no pipes: add cbreak-style "more" function) */
printf("\nCentral directory entry #%d:\n", j);
#else /* !VMS */
/* formfeed/CR for piping to "more": */
printf("%s\nCentral directory entry #%d:\n", "\014", j);
#endif /* ?VMS */
printf("---------------------------\n\n");
if ((error = long_info()) != 0) {
error_in_archive = error; /* might be warning */
if (error > 1) /* fatal */
return error;
}
break;
default:
SKIP_(crec.extra_field_length)
SKIP_(crec.file_comment_length)
break;
} /* end switch (lflag) */
uc += crec.uncompressed_size;
c += crec.compressed_size;
if (crec.general_purpose_bit_flag & 1)
c -= 12; /* if encrypted, don't count encryption header */
++members;
} else { /* not listing */
SKIP_(crec.extra_field_length)
SKIP_(crec.file_comment_length)
} /* end if (list member?) */
} /* end for-loop (j: member files) */
/*---------------------------------------------------------------------------
Double check that we're back at the end-of-central-directory record.
---------------------------------------------------------------------------*/
readbuf(sig, 4);
if (strncmp(sig, end_central_sig, 4)) { /* just to make sure again */
fprintf(stderr, EndSigMsg); /* didn't find end-of-central-dir sig */
error_in_archive = 1; /* 1: warning error */
}
/*---------------------------------------------------------------------------
Check that we actually found requested files; if so, print totals.
---------------------------------------------------------------------------*/
if (none_found && !process_all_files) {
fnamev = fnv; /* don't destroy permanent filename ptr */
for (--fnamev; *++fnamev; )
printf("zipinfo: %s not found in %s\n", *fnamev, zipfn);
} else if (tflag)
printf(
"%d file%s, %lu bytes uncompressed, %lu bytes compressed: %d%%\n",
members, (members==1)? "":"s", uc, c, (uc==0)? 0 : ((uc>2000000L)?
((int)((uc-c)/(uc/1000L))+5)/10 : ((int)((1000L*(uc-c))/uc)+5)/10) );
return error_in_archive;
} /* end function process_central_dir() */
/**************************************/
/* Function process_cdir_file_hdr() */
/**************************************/
int process_cdir_file_hdr() /* return PK-type error code */
{
cdir_byte_hdr byterec;
/*---------------------------------------------------------------------------
Read the next central directory entry and do any necessary machine-type
conversions (byte ordering, structure padding compensation--do so by
copying the data from the array into which it was read (byterec) to the
usable struct (crec)).
---------------------------------------------------------------------------*/
if (readbuf((char *) byterec, CREC_SIZE) <= 0)
return 51; /* 51: unexpected EOF */
crec.version_made_by[0] = byterec[C_VERSION_MADE_BY_0];
crec.version_made_by[1] = byterec[C_VERSION_MADE_BY_1];
crec.version_needed_to_extract[0] = byterec[C_VERSION_NEEDED_TO_EXTRACT_0];
crec.version_needed_to_extract[1] = byterec[C_VERSION_NEEDED_TO_EXTRACT_1];
crec.general_purpose_bit_flag =
makeword(&byterec[C_GENERAL_PURPOSE_BIT_FLAG]);
crec.compression_method =
makeword(&byterec[C_COMPRESSION_METHOD]);
crec.last_mod_file_time =
makeword(&byterec[C_LAST_MOD_FILE_TIME]);
crec.last_mod_file_date =
makeword(&byterec[C_LAST_MOD_FILE_DATE]);
crec.crc32 =
makelong(&byterec[C_CRC32]);
crec.compressed_size =
makelong(&byterec[C_COMPRESSED_SIZE]);
crec.uncompressed_size =
makelong(&byterec[C_UNCOMPRESSED_SIZE]);
crec.filename_length =
makeword(&byterec[C_FILENAME_LENGTH]);
crec.extra_field_length =
makeword(&byterec[C_EXTRA_FIELD_LENGTH]);
crec.file_comment_length =
makeword(&byterec[C_FILE_COMMENT_LENGTH]);
crec.disk_number_start =
makeword(&byterec[C_DISK_NUMBER_START]);
crec.internal_file_attributes =
makeword(&byterec[C_INTERNAL_FILE_ATTRIBUTES]);
crec.external_file_attributes =
makelong(&byterec[C_EXTERNAL_FILE_ATTRIBUTES]); /* LONG, not word! */
crec.relative_offset_local_header =
makelong(&byterec[C_RELATIVE_OFFSET_LOCAL_HEADER]);
return 0;
} /* end function process_cdir_file_hdr() */
/**************************/
/* Function long_info() */
/**************************/
int long_info() /* return PK-type error code */
{
int error, error_in_archive=0;
UWORD hostver, extver, xattr;
char workspace[12], attribs[22];
static char unkn[16];
static char *os[NUM_HOSTS+1] = {"MS-DOS or OS/2 FAT", "Amiga", "VAX VMS",
"Unix", "VM/CMS", "Atari ST", "OS/2 HPFS", "Macintosh",
"Z-System", "CP/M", "unknown" };
static char *method[NUM_METHODS+1] = {"none (stored)", "shrunk",
"reduced (factor 1)", "reduced (factor 2)",
"reduced (factor 3)", "reduced (factor 4)",
"imploded", "tokenized", "deflated", unkn};
static char *dtype[4] = {"normal", "maximum", "fast", "superfast"};
/*---------------------------------------------------------------------------
Print out various interesting things about the compressed file.
---------------------------------------------------------------------------*/
hostnum = MIN(crec.version_made_by[1], NUM_HOSTS);
hostver = crec.version_made_by[0];
extnum = MIN(crec.version_needed_to_extract[1], NUM_HOSTS);
extver = crec.version_needed_to_extract[0];
methnum = MIN(crec.compression_method, NUM_METHODS);
if (methnum == NUM_METHODS)
sprintf(unkn, "unknown (%d)", crec.compression_method);
printf(" %s\n", filename);
printf("\n host operating system (created on): %s\n",
os[hostnum]);
printf(" version of encoding software: %d.%d\n",
hostver/10, hostver%10);
printf(" minimum operating system compatibility required: %s\n",
os[extnum]);
printf(" minimum software version required to extract: %d.%d\n",
extver/10, extver%10);
printf(" compression method: %s\n",
method[methnum]);
if (methnum == IMPLODED) {
printf(" size of sliding dictionary (implosion): %cK\n",
(crec.general_purpose_bit_flag & 2)? '8' : '4');
printf(" number of Shannon-Fano trees (implosion): %c\n",
(crec.general_purpose_bit_flag & 4)? '3' : '2');
} else if (methnum == DEFLATED) {
UWORD dnum=(crec.general_purpose_bit_flag>>1) & 3;
printf(" compression sub-type (deflation): %s\n",
dtype[dnum]);
}
printf(" file security status: %sencrypted\n",
(crec.general_purpose_bit_flag & 1)? "" : "not ");
printf(" extended local header: %s\n",
(crec.general_purpose_bit_flag & 8)? "yes" : "no");
/* print upper 3 bits for amusement? */
printf(" file last modified on: %s\n",
zipinfo_time(&crec.last_mod_file_date, &crec.last_mod_file_time));
printf(" 32-bit CRC value (hex): %.8lx\n",
crec.crc32);
printf(" compressed size: %lu bytes\n",
crec.compressed_size);
printf(" uncompressed size: %lu bytes\n",
crec.uncompressed_size);
printf(" length of filename: %u characters\n",
crec.filename_length);
printf(" length of extra field: %u bytes\n",
crec.extra_field_length);
printf(" length of file comment: %u characters\n",
crec.file_comment_length);
printf(" disk number on which file begins: disk %u\n",
crec.disk_number_start);
printf(" apparent file type: %s\n",
(crec.internal_file_attributes & 1)? "text" : "binary");
/*
printf(" external file attributes (hex): %.8lx\n",
crec.external_file_attributes);
*/
xattr = (UWORD) ((crec.external_file_attributes >> 16) & 0xFFFF);
if (hostnum == VMS_) {
char *p=attribs, *q=attribs+1;
int i, j, k;
for (k = 0; k < 12; ++k)
workspace[k] = 0;
if (xattr & S_IRUSR)
workspace[0] = 'R';
if (xattr & S_IWUSR) {
workspace[1] = 'W';
workspace[3] = 'D';
}
if (xattr & S_IXUSR)
workspace[2] = 'E';
if (xattr & S_IRGRP)
workspace[4] = 'R';
if (xattr & S_IWGRP) {
workspace[5] = 'W';
workspace[7] = 'D';
}
if (xattr & S_IXGRP)
workspace[6] = 'E';
if (xattr & S_IROTH)
workspace[8] = 'R';
if (xattr & S_IWOTH) {
workspace[9] = 'W';
workspace[11] = 'D';
}
if (xattr & S_IXOTH)
workspace[10] = 'E';
*p++ = '(';
for (k = j = 0; j < 3; ++j) { /* loop over groups of permissions */
for (i = 0; i < 4; ++i, ++k) /* loop over perms within a group */
if (workspace[k])
*p++ = workspace[k];
*p++ = ','; /* group separator */
if (j == 0)
while ((*p++ = *q++) != ','); /* system, owner perms are same */
}
*p-- = 0;
*p = ')'; /* overwrite last comma */
printf(" VMS file attributes (%06o octal): %s\n",
xattr, attribs);
} else if ((hostnum != DOS_OS2_FAT_) && (hostnum != OS2_HPFS_)) {
/* assume Unix-like */
switch (xattr & S_IFMT) {
case S_IFREG: attribs[0] = '-'; break;
case S_IFLNK: attribs[0] = 'l'; break;
case S_IFBLK: attribs[0] = 'b'; break;
case S_IFCHR: attribs[0] = 'c'; break;
case S_IFIFO: attribs[0] = 'p'; break;
case S_IFSOCK: attribs[0] = 's'; break;
case S_IFDIR: attribs[0] = 'd'; break;
default: attribs[0] = '?'; break;
}
if (xattr & S_IRUSR) /* no read-permission: user */
attribs[1] = 'r';
else
attribs[1] = '-';
if (xattr & S_IWUSR) /* no write-permission: user */
attribs[2] = 'w';
else
attribs[2] = '-';
if (xattr & S_IXUSR) /* no execute-permission: user */
if (xattr & S_ISUID)
attribs[3] = 's';
else
attribs[3] = 'x';
else
if (xattr & S_ISUID)
attribs[3] = 'S'; /* undefined state */
else
attribs[3] = '-';
if (xattr & S_IRGRP) /* no read-permission: group */
attribs[4] = 'r';
else
attribs[4] = '-';
if (xattr & S_IWGRP) /* no write-permission: group */
attribs[5] = 'w';
else
attribs[5] = '-';
if (xattr & S_IXGRP) /* no execute-permission: group */
if (xattr & S_ISGID)
attribs[6] = 's';
else
attribs[6] = 'x';
else
if (xattr & S_ISGID) /* or could use S_ENFMT (same) */
attribs[6] = 'l';
else
attribs[6] = '-';
if (xattr & S_IROTH) /* no read-permission: other */
attribs[7] = 'r';
else
attribs[7] = '-';
if (xattr & S_IWOTH) /* no write-permission: other */
attribs[8] = 'w';
else
attribs[8] = '-';
if (xattr & S_IXOTH) /* no execute-permission: other */
if (xattr & S_ISVTX) /* "sticky bit" */
attribs[9] = 't';
else
attribs[9] = 'x';
else
if (xattr & S_ISVTX)
attribs[9] = 'T'; /* undefined state */
else
attribs[9] = '-';
attribs[10] = 0;
printf(" Unix file attributes (%06o octal): %s\n",
xattr, attribs);
} /* endif (hostnum: external attributes format) */
if ((xattr=(UWORD)(crec.external_file_attributes & 0xFF)) == 0)
printf(" MS-DOS file attributes (%02X hex): none\n",
xattr);
else if (xattr == 1)
printf(
" MS-DOS file attributes (%02X hex): read-only\n",
xattr);
else
printf(
" MS-DOS file attributes (%02X hex): %s%s%s%s%s%s\n",
xattr, (xattr&1)?"rdo ":"", (xattr&2)?"hid ":"", (xattr&4)?"sys ":"",
(xattr&8)?"lab ":"", (xattr&16)?"dir ":"", (xattr&32)?"arc":"");
printf(
" offset of local header from start of archive: %lu (%.8lXh) bytes\n",
crec.relative_offset_local_header, crec.relative_offset_local_header);
/*---------------------------------------------------------------------------
Skip the extra field, if any, and print the file comment, if any (the
filename has already been printed, above). That finishes up this file
entry...
---------------------------------------------------------------------------*/
if (crec.extra_field_length > 0) {
/* #ifdef OS2 */
#if TRUE
ULONG ea_size;
if ((error = do_string(crec.extra_field_length, EXTRA_FIELD)) != 0) {
error_in_archive = error;
if (error > 1) /* fatal: can't continue */
return (error);
}
if ((ea_size = SizeOfEAs(extra_field)) != 0)
printf("\n\
This file has %lu bytes of OS/2 EA's in the local extra field.\n\
(May not match OS/2 \"dir\" amount due to storage method.)\n\n",
ea_size);
else
printf("\n There is an unknown extra field (skipping).\n");
#else
printf("\n There is an extra field (skipping).\n");
SKIP_(crec.extra_field_length)
#endif
} else
printf("\n");
if (!crec.file_comment_length)
printf(" There is no file comment.\n");
else {
printf("\
------------------------- file comment begins ----------------------------\n");
if ((error = do_string(crec.file_comment_length, DISPLAY)) != 0) {
error_in_archive = error; /* might be warning */
if (error > 1) /* fatal */
return error;
}
printf("\n\
-------------------------- file comment ends -----------------------------\n");
}
return error_in_archive;
} /* end function long_info() */
/**************************/
/* Function SizeOfEAs() */
/**************************/
ULONG SizeOfEAs(extra_field) /* Author: Kai Uwe Rommel */
void *extra_field;
{
EAHEADER *pEAblock = (PEAHEADER) extra_field;
if ( extra_field != NULL && pEAblock -> nID == EAID )
return pEAblock -> lSize;
return 0L;
}
/***************************/
/* Function short_info() */
/***************************/
int short_info() /* return PK-type error code */
{
int k, error, error_in_archive=0;
UWORD hostver, xattr;
char workspace[12], attribs[16];
static char impl[5]="i#:#", defl[5]="def#", unkn[8];
static char dtype[5]="NXFS"; /* normal, maximum, fast, superfast */
static char *os[NUM_HOSTS+1] = {"dos", "ami", "vms", "unx", "cms",
"atr", "os2", "mac", "zzz", "cpm", "???" };
static char *method[NUM_METHODS+1] = {"stor", "shrk", "re:1", "re:2",
"re:3", "re:4", impl, "tokn", defl, unkn};
/*---------------------------------------------------------------------------
Print out various interesting things about the compressed file.
---------------------------------------------------------------------------*/
methnum = MIN(crec.compression_method, NUM_METHODS);
hostnum = MIN(crec.version_made_by[1], NUM_HOSTS);
hostver = crec.version_made_by[0];
/*
extnum = MIN(crec.version_needed_to_extract[1], NUM_HOSTS);
extver = crec.version_needed_to_extract[0];
*/
if (methnum == IMPLODED) {
impl[1] = (crec.general_purpose_bit_flag & 2)? '8' : '4';
impl[3] = (crec.general_purpose_bit_flag & 4)? '3' : '2';
} else if (methnum == DEFLATED) {
UWORD dnum=(crec.general_purpose_bit_flag>>1) & 3;
defl[3] = dtype[dnum];
} else if (methnum == NUM_METHODS) { /* unknown */
sprintf(unkn, "u%03d", crec.compression_method);
}
for (k = 0; k < 15; ++k)
attribs[k] = ' ';
attribs[15] = 0;
xattr = (UWORD) ((crec.external_file_attributes >> 16) & 0xFFFF);
switch (hostnum) {
case VMS_:
{ char *p=attribs;
int i, j;
for (k = 0; k < 12; ++k)
workspace[k] = 0;
if (xattr & S_IRUSR)
workspace[0] = 'R';
if (xattr & S_IWUSR) {
workspace[1] = 'W';
workspace[3] = 'D';
}
if (xattr & S_IXUSR)
workspace[2] = 'E';
if (xattr & S_IRGRP)
workspace[4] = 'R';
if (xattr & S_IWGRP) {
workspace[5] = 'W';
workspace[7] = 'D';
}
if (xattr & S_IXGRP)
workspace[6] = 'E';
if (xattr & S_IROTH)
workspace[8] = 'R';
if (xattr & S_IWOTH) {
workspace[9] = 'W';
workspace[11] = 'D';
}
if (xattr & S_IXOTH)
workspace[10] = 'E';
for (k = j = 0; j < 3; ++j) { /* groups of permissions */
for (i = 0; i < 4; ++i, ++k) /* perms within a group */
if (workspace[k])
*p++ = workspace[k];
*p++ = ','; /* group separator */
}
*--p = ' '; /* overwrite last comma */
if ((p - attribs) < 12)
sprintf(&attribs[12], "%d.%d", hostver/10, hostver%10);
}
break;
case DOS_OS2_FAT_:
case OS2_HPFS_:
xattr = (UWORD) (crec.external_file_attributes & 0xFF);
sprintf(attribs, "%s,%s,%s,%s", (xattr&32)?"arc":"",
(xattr&2)?"hid":"", (xattr&1)?"rdo":"rw", (xattr&4)?"sys":"");
if ((k = strlen(attribs)) < 15)
attribs[k] = ' '; /* overwrite '\0' */
if (k < 12)
sprintf(&attribs[12], "%d.%d", hostver/10, hostver%10);
break;
default: /* assume Unix-like */
switch (xattr & S_IFMT) {
case S_IFREG: attribs[0] = '-'; break;
case S_IFLNK: attribs[0] = 'l'; break;
case S_IFBLK: attribs[0] = 'b'; break;
case S_IFCHR: attribs[0] = 'c'; break;
case S_IFIFO: attribs[0] = 'p'; break;
case S_IFSOCK: attribs[0] = 's'; break;
case S_IFDIR: attribs[0] = 'd'; break;
default: attribs[0] = '?'; break;
}
if (xattr & S_IRUSR) /* no read-permission: user */
attribs[1] = 'r';
else
attribs[1] = '-';
if (xattr & S_IWUSR) /* no write-permission: user */
attribs[2] = 'w';
else
attribs[2] = '-';
if (xattr & S_IXUSR) /* no execute-permission: user */
if (xattr & S_ISUID)
attribs[3] = 's';
else
attribs[3] = 'x';
else
if (xattr & S_ISUID)
attribs[3] = 'S'; /* undefined state */
else
attribs[3] = '-';
if (xattr & S_IRGRP) /* no read-permission: group */
attribs[4] = 'r';
else
attribs[4] = '-';
if (xattr & S_IWGRP) /* no write-permission: group */
attribs[5] = 'w';
else
attribs[5] = '-';
if (xattr & S_IXGRP) /* no execute-permission: group */
if (xattr & S_ISGID)
attribs[6] = 's';
else
attribs[6] = 'x';
else
if (xattr & S_ISGID) /* or could use S_ENFMT (same) */
attribs[6] = 'l';
else
attribs[6] = '-';
if (xattr & S_IROTH) /* no read-permission: other */
attribs[7] = 'r';
else
attribs[7] = '-';
if (xattr & S_IWOTH) /* no write-permission: other */
attribs[8] = 'w';
else
attribs[8] = '-';
if (xattr & S_IXOTH) /* no execute-permission: other */
if (xattr & S_ISVTX) /* "sticky bit" */
attribs[9] = 't';
else
attribs[9] = 'x';
else
if (xattr & S_ISVTX)
attribs[9] = 'T'; /* undefined state */
else
attribs[9] = '-';
sprintf(&attribs[12], "%d.%d", hostver/10, hostver%10);
break;
} /* end switch (hostnum: external attributes format) */
printf("%s %s %7lu %c%c", attribs, os[hostnum], crec.uncompressed_size,
(crec.general_purpose_bit_flag & 1)?
((crec.internal_file_attributes & 1)? 'T' : 'B') : /* encrypted */
((crec.internal_file_attributes & 1)? 't' : 'b'), /* plaintext */
(crec.general_purpose_bit_flag & 8)? (crec.extra_field_length? 'X' : 'l')
: (crec.extra_field_length? 'x' : '-'));
if (lflag == 4) {
longint c = (longint) crec.compressed_size;
longint uc = (longint) crec.uncompressed_size;
if (crec.general_purpose_bit_flag & 1)
c -= 12; /* if encrypted, don't count encryption header */
/* risk signed overflow if blindly multiply: */
printf("%3d%%", (uc==0)? 0 : ((uc>2000000L)?
((int)((uc-c)/(uc/1000L))+5)/10 : ((int)((1000L*(uc-c))/uc)+5)/10) );
} else if (lflag == 5)
printf(" %7lu", crec.compressed_size);
printf(" %s %s %s\n", method[methnum],
zipinfo_time(&crec.last_mod_file_date, &crec.last_mod_file_time),
filename);
/*---------------------------------------------------------------------------
Skip the extra field and/or the file comment, if any (the filename has
already been printed, above). That finishes up this file entry...
---------------------------------------------------------------------------*/
SKIP_(crec.extra_field_length)
SKIP_(crec.file_comment_length)
return error_in_archive;
} /* end function short_info() */
/*****************************/
/* Function zipinfo_time() */
/*****************************/
char *zipinfo_time(datez, timez)
UWORD *datez, *timez;
{
UWORD yr, mo, dy, hh, mm, ss;
static char d_t_str[21];
static char *month[12] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
/*---------------------------------------------------------------------------
Convert the file-modification date and time info to a string of the form
"23 Feb 1990 17:15:00" or "23-Feb-91 17:15," depending on value of lflag.
---------------------------------------------------------------------------*/
yr = ((*datez >> 9) & 0x7f) + 80; /* dissect date */
mo = ((*datez >> 5) & 0x0f) - 1;
dy = *datez & 0x1f;
hh = (*timez >> 11) & 0x1f; /* dissect time */
mm = (*timez >> 5) & 0x3f;
ss = (*timez & 0x1f) * 2;
if ((lflag >= 3) && (lflag <= 5))
sprintf(d_t_str, "%2u-%s-%u %02u:%02u", dy, month[mo], yr, hh, mm);
else if (lflag > 9) /* verbose listing format */
sprintf(d_t_str, "%u %s %u %02u:%02u:%02u", dy, month[mo], yr+1900,
hh, mm, ss);
return d_t_str;
} /* end function zipinfo_time() */
/********************************/
/* Function open_input_file() */
/********************************/
int open_input_file() /* return 1 if open failed */
{
/*
* open the zipfile for reading and in BINARY mode to prevent cr/lf
* translation, which would corrupt the bitstreams
*/
#ifdef VMS
zipfd = open(zipfn, O_RDONLY, 0, "ctx=stm");
#else /* !VMS */
#ifdef UNIX
zipfd = open(zipfn, O_RDONLY);
#else /* !UNIX */
#ifdef MACOS
zipfd = open(zipfn, 0);
#else /* !MACOS */
zipfd = open(zipfn, O_RDONLY | O_BINARY);
#endif /* ?MACOS */
#endif /* ?UNIX */
#endif /* ?VMS */
if (zipfd < 1) {
fprintf(stderr, "error: can't open zipfile [ %s ]\n", zipfn);
return 1;
}
return 0;
} /* end function open_input_file() */
/************************/
/* Function readbuf() */
/************************/
int readbuf(buf, size) /* return number of bytes read into buf */
char *buf;
register unsigned size;
{
register int count;
int n;
n = size;
while (size) {
if (incnt == 0) {
if ((incnt = read(zipfd, inbuf, INBUFSIZ)) <= 0)
return (n-size);
/* buffer ALWAYS starts on a block boundary: */
cur_zipfile_bufstart += INBUFSIZ;
inptr = inbuf;
}
count = MIN(size, (unsigned)incnt);
memcpy(buf, inptr, count);
buf += count;
inptr += count;
incnt -= count;
size -= count;
}
return n;
} /* end function readbuf() */
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.