source: main/trunk/binaries/windows/bin/GNUfile/contrib/file/5.03/file-5.03-src/ChangeLog@ 31442

2009-05-06  10:25  Christos Zoulas <[email protected]>

    * Avoid null dereference in cdf code (Drew Yao)

    * More cdf bounds checks and overflow checks

2009-05-01  18:37  Christos Zoulas <[email protected]>

    * Buffer overflow fixes from Drew Yao

2009-04-30  17:10  Christos Zoulas <[email protected]>

    * Fix more cdf lossage. All the documents I have
      right now print the correct information.

2009-03-27  18:43  Christos Zoulas <[email protected]>

    * don't print \012- separators in the same magic entry 
      if it consists of multiple magic printing lines.

2009-03-23  10:20  Christos Zoulas <[email protected]>

    * Avoid file descriptor leak in compress code from
      (Daniel Novotny)

2009-03-18  16:50  Christos Zoulas <[email protected]>

    * Allow escaping of relation characters, so that we can say \^[A-Z]
      and the ^ is not eaten as a relation char.

    * Fix troff and fortran to their previous glory using
      regex. This was broken since their removel from ascmagic.

2009-03-10  16:50  Christos Zoulas <[email protected]>

    * don't use strlen in strndup() (Toby Peterson)

2009-03-10  7:45  Christos Zoulas <[email protected]>

    * avoid c99 syntax.

2009-02-23 15:45  Christos Zoulas <[email protected]>

    * make the cdf code use the buffer first if available,
      and then the fd code.

2009-02-13 13:45  Christos Zoulas <[email protected]>

    * look for struct option to determine if getopt.h is usable for IRIX.

    * sanitize cdf document strings

2009-02-04 13:25  Christos Zoulas <[email protected]>

    * fix OS/2 warnings.

2008-12-12 15:50  Christos Zoulas <[email protected]>

    * fix initial offset calculation for non 4K sector files

    * add loop limits to avoid DoS attacks by constructing
      looping sector references.

2008-12-03 13:05  Christos Zoulas <[email protected]>

    * fix memory botches on cdf file parsing.

    * exit with non-zero value for any error, not just for the last
      file processed.

2008-11-09 20:42  Charles Longeau <[email protected]>

    * Replace all str{cpy,cat} functions with strl{cpy,cat}
    * Ensure that strl{cpy,cat} are included in libmagic,
      as needed.

2008-11-06 18:18  Christos Zoulas <[email protected]>

    * Handle ID3 format files.

2008-11-06 23:00  Reuben Thomas <[email protected]>

    * Fix --mime, --mime-type and --mime-encoding under new scheme.

    * Rename "ascii" to "text" and add "encoding" test.

    * Return a precise ("utf-16le" or "utf-16be") MIME charset for
      UTF-16.

    * Fix error in comment caused by automatic indentation adding
      words!

2008-11-06 10:35  Christos Zoulas <[email protected]>

    * use memchr instead of strchr because the string
      might not be NUL terminated (Scott MacVicar)

2008-11-03 07:31  Reuben Thomas <[email protected]>

    * Fix a printf with a non-literal format string.

    * Fix formatting and punctuation of help for "--apple".

2008-10-30 11:00  Reuben Thomas <[email protected]>

    * Correct words counts in comments of struct magic.

    * Fix handle_annotation to allow both Apple and MIME types to be
      printed, and to return correct code if MIME type is
      printed (1, not 0) or if there's an error (-1 not 1).

    * Fix output of charset for MIME type (precede with semi-colon;
      fixes Debian bug #501460).

    * Fix potential attacks via conversion specifications in magic
      strings.

    * Add a FIXME for Debian bug #488562 (magic files should be
      read in a defined order, by sorting the names).

2008-10-18 16:45  Christos Zoulas <[email protected]>

    * Added APPLE file creator/type

2008-10-12 10:20  Christos Zoulas <[email protected]>

    * Added CDF parsing

2008-10-09 16:40  Christos Zoulas <[email protected]>

    * filesystem and msdos patches (Joerg Jenderek)

2008-10-09 13:20  Christos Zoulas <[email protected]>

    * correct --exclude documentation issues: remove troff and fortran
      and rename "token" to "tokens". (Randy McMurchy)

2008-10-01 10:30  Christos Zoulas <[email protected]>

    * Read ~/.magic in addition to the default magic file not instead
      of, as documented in the man page.

2008-09-10 21:30  Reuben Thomas  <[email protected]>

    * Comment out graphviz patterns, as they match too many files.

2008-08-30 12:54  Christos Zoulas <[email protected]>

    * Don't eat trailing \n in magic enties.

    * Cast defines to allow compilation using a c++ compiler.

2008-08-25 23:56  Reuben Thomas  <[email protected]>

    * Add text/x-lua MIME type for Lua scripts.

    * Escape { in regex in graphviz patterns.

2008-07-26 00:59  Reuben Thomas  <[email protected]>

    * Add MIME types for special files.

    * Use access to give more accurate information for files that
      can't be opened.

    * Add a TODO list.

2008-07-02 11:15  Christos Zoulas  <[email protected]>

    * add !:strength op to adjust magic strength (experimental)

2008-06-16 21:41  Reuben Thomas  <[email protected]>

    * Fix automake error in configure.ac.

    * Add MIME type for Psion Sketch files.

2008-06-05 08:59  Christos Zoulas  <[email protected]>

    * Don't print warnings about bad namesize in stripped
      binaries with PT_NOTE is still there, and the actual
      note is gone (Jakub Jelinek)

2008-05-28 15:12  Robert Byrnes  <[email protected]>

    * magic/Magdir/elf:
      Note invalid byte order for little-endian SPARC32PLUS.
      Add SPARC V9 vendor extensions and memory model.

    * src/elfclass.h:
      Pass target machine to doshn (for Solaris hardware capabilities).

    * src/readelf.c (doshn):
      Add support for Solaris hardware/software capabilities.

    * src/readelf.h:
      Ditto.

    * src/vasprintf.c (dispatch):
      Add support for ll modifier.

2008-05-16 10:25  Christos Zoulas  <[email protected]>

    * Fix compiler warnings.

    * remove stray printf, and fix a vprintf bug. (Martin Dorey)

2008-05-06 00:13  Robert Byrnes  <[email protected]>

    * src/Makefile.am:
      Ensure that getopt_long and [v]asprintf are included in libmagic,
      as needed.

      Remove unnecessary EXTRA_DIST.

    * src/Makefile.in:
      Rerun automake.

    * src/vasprintf.c (dispatch):
      Fix variable precision bug: be sure to step past '*'.

    * src/vasprintf.c (core):
      Remove unreachable code.

    * src/apprentice.c (set_test_type):
      Add cast to avoid compiler warning.

2008-04-22 23:45  Christos Zoulas  <[email protected]>

    * Add magic submission guidelines (Abel Cheung)

    * split msdos and windows magic (Abel Cheung)

2008-04-04 11:00  Christos Zoulas  <[email protected]>

    * >= <= is not supported, so fix the magic and warn about it.
      reported by: Thien-Thi Nguyen <[email protected]>

2008-03-27 16:16  Robert Byrnes  <[email protected]>

    * src/readelf.c (donote):
      ELF core file command name/line bug fixes and enhancements:

      Try larger offsets first to avoid false matches
      from earlier data that happen to look like strings;
      this primarily affected SunOS 5.x 32-bit Intel core files.

      Add support for command line (instead of just short name)
      for SunOS 5.x.

      Add information about NT_PSINFO for SunOS 5.x.

      Only trim whitespace from end of command line.

2007-02-11 01:36 Reuben Thomas <[email protected]>

    * Change strength of ! from MULT to 0, as it matches almost
          anything (Reuben Thomas)

    * Debian fixes (Reuben Thomas)

2007-02-11 00:17 Reuben Thomas <[email protected]>

    * Clarify UTF-8 BOM message (Reuben Thomas)

    * Add HTML comment to token list in names.h

2007-02-04 15:50 Christos Zoulas <[email protected]>

    * Debian fixes (Reuben Thomas)

2007-02-04 11:31 Christos Zoulas <[email protected]>

    * !:mime annotations in magic files (Reuben Thomas)

2007-01-29 15:35 Christos Zoulas <[email protected]>

    * zero out utime/utimes structs (Gavin Atkinson)

2007-01-26 13:45 Christos Zoulas <[email protected]>

    * reduce writable data from Diego "Flameeyes" Petten

2007-12-28 15:06 Christos Zoulas <[email protected]>

    * strtof detection

    * remove bogus regex magic that could cause a DoS

    * better mismatch version message

2007-12-27 11:35 Christos Zoulas <[email protected]>

    * bring back some fixes from OpenBSD

    * treat ELF dynamic objects as executables

    * fix gcc warnings

2007-12-01 19:55 Christos Zoulas <[email protected]>

    * make sure we have zlib.h and libz to compile the builtin
      decompress code

2007-10-28 20:48 Christos Zoulas <[email protected]>

    * float and double magic support (Behan Webster)

2007-10-28 20:48 Christos Zoulas <[email protected]>

    * Convert fortran to a soft test (Reuben Thomas)

2007-10-23  5:25 Christos Zoulas <[email protected]>

    * Add --with-filename, and --no-filename (Reuben Thomas)

2007-10-23  3:59 Christos Zoulas <[email protected]>

    * Rest of the mime split (Reuben Thomas)

    * Make usage message generated from the flags so that
      they stay consistent (Reuben Thomas)

2007-10-20  3:06 Christos Zoulas <[email protected]>

    * typo in comment, missing ifdef QUICK, remove unneeded code
        (Charles Longeau)

2007-10-17  3:33 Christos Zoulas <[email protected]>

    * Fix problem printing -\012 in some entries

    * Separate magic type and encoding flags (Reuben Thomas)

2007-10-09  3:55 Christos Zoulas <[email protected]>

    * configure fix for int64 and strndup (Reuben Thomas)

2007-09-26  4:45 Christos Zoulas <[email protected]>

    * Add magic_descriptor() function.

    * Fix regression in elf reading code where the core name was
      not being printed.

    * Don't convert NUL's to spaces in {l,b}estring16 (Daniel Dawson)

2007-08-19  6:30 Christos Zoulas <[email protected]>

    * Make mime format consistent so that it can
      be easily parsed:
          mimetype [charset=character-set] [encoding=encoding-mime-type]

      Remove spurious extra text from some MIME type printouts
      (mostly in is_tar).

      Fix one case where -i produced nothing at all (for a 1-byte file,
      which is now classed as application/octet-stream).

      Remove 7/8bit classifications, since they were arbitrary
      and not based on the file data.

      This work was done by Reuben Thomas

2007-05-24 10:00 Christos Zoulas <[email protected]>

    * Fix another integer overflow (Colin Percival)

2007-03-26 13:58 Christos Zoulas <[email protected]>

    * make sure that all of struct magic_set is initialized appropriately
      (Brett)

2007-03-25 17:44 Christos Zoulas <[email protected]>

    * reset left bytes in the buffer (Dmitry V. Levin)

    * compilation failed with COMPILE_ONLY and ENABLE_CONDITIONALS
      (Peter Avalos)

2007-03-15 10:51 Christos Zoulas <[email protected]>

    * fix fortran and nroff reversed tests (Dmitry V. Levin)

    * fix exclude option (Dmitry V. Levin)

2007-02-08 17:30 Christos Zoulas <[email protected]>

    * fix integer underflow in file_printf which can lead to
      to exploitable heap overflow (Jean-Sebastien Guay-Lero)

2007-02-05 11:35 Christos Zoulas <[email protected]>

    * make socket/pipe reading more robust

2007-01-25 16:01 Christos Zoulas <[email protected]>

    * Centralize all the tests in file_buffer.

    * Add exclude flag.

2007-01-18 05:29 Anon Ymous <[email protected]>

    * Move the "type" detection code from parse() into its own table
      driven routine.  This avoids maintaining multiple lists in
      file.h.

    * Add an optional conditional field (ust before the type field).
      This code is wrapped in "#ifdef ENABLE_CONDITIONALS" as it is
      likely to go away.

2007-01-16 23:24 Anon Ymous <[email protected]>

    * Fix an initialization bug in check_mem().

2007-01-16 14:58 Anon Ymous <[email protected]>

    * Add a "default" type to print a message if nothing previously
      matched at that level or since the last default at that
      level.  This is useful for setting up switch-like statements.
      It can also be used to do if/else constructions without a
      redundant second test.

    * Fix the "x" special case test so that one can test for that
      string with "=x".

    * Allow "search" to search the entire buffer if the "/N"
      search count is missing.

    * Make "regex" work!  It now starts its search at the
      specified offset and takes an (optional) "/N" line count to
      specify the search range; otherwise it searches to the end
      of the file.  The match is now grabbed correctly for format
      strings and the offset set to the end of the match.

    * Add a "/s" flag to "regex" and "search" to set the offset to
      the start of the match.  By default the offset is set to the
      end of the match, as it is with other tests.  This is mostly
      useful for "regex".

    * Make "search", "string" and "pstring" use the same
      file_strncmp() routine so that they support the same flags;
      "bestring16" and "lestring16" call the same routine, but
      with flags = 0.  Also add a "/C" flag (in analogy to "/c")
      to ignore the case on uppercase (lowercase) characters in
      the test string.

    * Strict adherence to C style string escapes.  A warnings are
      printed when compiling.  Note: previously "\a" was
      incorrectly translated to 'a' instead of an <alert> (i.e.,
      BELL, typically 0x07).

    * Make this compile with "-Wall -Wextra" and all the warning
      flags used with WARNS=4 in the NetBSD source.  Also make it
      pass lint.

    * Many "cleanups" and hopefully not too many new bugs!

2007-01-16 14:56 Anon Ymous <[email protected]>

    * make several more files compile with gcc warnings
      on and also make them pass lint.

2007-01-16 14:54 Anon Ymous <[email protected]>

    * fix a puts()/putc() usage goof in file.c

    * make file.c compile with gcc warnings and pass lint

2006-12-11 16:49 Christos Zoulas <[email protected]>

    * fix byteswapping issue

    * report the number of bytes we tried to
      allocate when allocation fails

    * add a few missed cases in the strength routine

2006-12-08 16:32 Christos Zoulas <[email protected]>

    * store and print the line number of the magic
      entry for debugging.

    * if the magic entry did not print anything,
      don't treat it as a match

    * change the magic strength algorithm to take
      into account the relationship op.

    * fix a bug in search where we could accidentally
      return a match.

    * propagate the error return from match to
      file_softmagic.

2006-11-25 13:35 Christos Zoulas <[email protected]>

    * Don't store the current offset in the magic
      struct, because it needs to be restored and
      it was not done properly all the time. Bug
      found by: Arkadiusz Miskiewicz

    * Fix problem in the '\0' separator; and don't
      print it as an additional separator; print
      it as the only separator.

2006-11-17 10:51 Christos Zoulas <[email protected]>

    * Added a -0 option to print a '\0' separator
      Etienne Buira <[email protected]>

2006-10-31 15:14 Christos Zoulas <[email protected]>

    * Check offset before copying (Mike Frysinger)

    * merge duplicated code

    * add quad date support

    * make sure that we nul terminate desc (Ryoji Kanai)

    * don't process elf notes multiple times

    * allow -z to report empty compressed files

    * use calloc to initialize the ascii buffers (Jos van den Oever)

2006-06-08 11:11 Christos Zoulas <[email protected]>

    * QNX fixes (Mike Gorchak)

    * Add quad support.

    * FIFO checks (Dr. Werner Fink)

    * Linux ELF fixes (Dr. Werner Fink)

    * Magic format checks (Dr. Werner Fink)

    * Magic format function improvent (Karl Chen)

2006-05-03 11:11 Christos Zoulas <[email protected]>

    * Pick up some elf changes and some constant fixes from SUSE

    * Identify gnu tar vs. posix tar

    * When keep going, don't print spurious newlines (Radek Vokál)

2006-04-01 12:02 Christos Zoulas <[email protected]>

    * Use calloc instead of malloc (Mike Frysinger)

    * Fix configure script to detect wctypes.h (Mike Frysinger)

2006-03-02 16:06 Christos Zoulas <[email protected]>

    * Print empty if the file is (Mike Frysinger)

    * Don't try to read past the end of the buffer (Mike Frysinger)

    * Sort magic entries by strength [experimental]

2005-11-29 13:26 Christos Zoulas <[email protected]>

    * Use iswprint() to convert the output string.
        (Bastien Nocera)

2005-10-31 8:54 Christos Zoulas <[email protected]>

    * Fix regression where the core info was not completely processed
        (Radek Vokál)

2005-10-20 11:15 Christos Zoulas <[email protected]>

    * Middle Endian magic (Diomidis Spinellis)

2005-10-17 11:15 Christos Zoulas <[email protected]>

    * Open with O_BINARY for CYGWIN (Corinna Vinschen)

    * Don't close stdin (Arkadiusz Miskiewicz)

    * Look for note sections in non executables.

2005-09-20 13:33 Christos Zoulas <[email protected]>

    * Don't print SVR4 Style in core files multiple times
        (Radek Vokál)

2005-08-27 04:09 Christos Zoulas <[email protected]>

    * Cygwin changes Corinna Vinschen

2005-08-18 09:53 Christos Zoulas <[email protected]>

    * Remove erroreous mention of /etc/magic in the file man page
      This is gentoo bug 101639. (Mike Frysinger)

    * Cross-compile support and detection (Mike Frysinger)

2005-08-12 10:17 Christos Zoulas <[email protected]>

    * Add -h flag and dereference symlinks if POSIXLY_CORRECT
      is set.

2005-07-29 13:57 Christos Zoulas <[email protected]>

    * Avoid search and regex buffer overflows (Kelledin)

2005-07-12 11:48 Christos Zoulas <[email protected]>

    * Provide stub implementations for {v,}nsprintf() for older
      OS's that don't have them.
    * Change mbstate_t autoconf detection macro from AC_MBSTATE_T
      to AC_TYPE_MBSTATE_T.

2005-06-25 11:48 Christos Zoulas <[email protected]>

    * Dynamically allocate the string buffers and make the
      default read size 256K.

2005-06-01 00:00 Joerg Sonnenberger <[email protected]>

    * Dragonfly ELF note support

2005-03-14 00:00 Giuliano Bertoletti <[email protected]>

    * Avoid NULL pointer dereference in time conversion.

2005-03-06 00:00  Joerg Walter <[email protected]>

    * Add indirect magic offset support, and search mode.

2005-01-12 00:00  Stepan Kasal  <[email protected]>

    * src/ascmagic.c (file_ascmagic): Fix three bugs about text files:
      If a CRLF text file happens to have CR at offset HOWMANY - 1
      (currently 0xffff), it should not be counted as CR line
      terminator.
      If a line has length exactly MAXLINELEN, it should not yet be
      treated as a ``very long line'', as MAXLINELEN is ``longest sane
      line length''.
      With CRLF, the line length was not computed correctly, and even
      lines of length MAXLINELEN - 1 were treated as ``very long''.

2004-12-07 14:15  Christos Zoulas  <[email protected]>

    * bzip2 needs a lot of input buffer space on some files
      before it can begin uncompressing. This makes file -z
      fail on some bz2 files. Fix it by giving it a copy of
      the file descriptor to read as much as it wants if we
      have access to it. <[email protected]>

2004-11-24 12:39  Christos Zoulas  <[email protected]>

    * Stack smash fix, and ELF more conservative reading.
      Jakub Bogusz <[email protected]>

2004-11-20 18:50  Christos Zoulas  <[email protected]>

    * New FreeBSD version parsing code:
      Jon Noack <[email protected]>

    * Hackish support for ucs16 strings <[email protected]>

2004-11-13 03:07  Christos Zoulas  <[email protected]>

    * print the file name and line number in syntax errors.

2004 10-12 10:50  Christos Zoulas  <[email protected]>

    * Fix stack overwriting on 0 length strings: Tim Waugh
        <[email protected]> Ned Ludd <[email protected]>

2004-09-27 11:30  Christos Zoulas  <[email protected]>

    * Remove 3rd and 4th copyright clause; approved by Ian Darwin.

    * Fix small memory leaks; caught by: Tamas Sarlos
        <[email protected]>

2004-07-24 16:33  Christos Zoulas  <[email protected]>

    * magic.mime update Danny Milosavljevic <[email protected]>

    * FreeBSD version update Oliver Eikemeier <[email protected]>

    * utime/utimes detection Ian Lance Taylor <[email protected]>

    * errors reading elf magic Jakub Bogusz <[email protected]>

2004-04-12 10:55  Christos Zoulas  <[email protected]>

    * make sure that magic formats match magic types during compilation

    * fix broken sgi magic file

2004-04-06 20:36  Christos Zoulas  <[email protected]>

    * detect present of mbstate_t Petter Reinholdtsen <[email protected]>

    * magic fixes

2004-03-22 15:25  Christos Zoulas  <[email protected]>

    * Lots of mime fixes
      (Joerg Ostertag) <[email protected]>

    * FreeBSD ELF version handling
      (Edwin Groothuis) <[email protected]>

    * correct cleanup in all cases; don't just close the file.
      (Christos Zoulas) <[email protected]>

    * add gettext message catalogue support
      (Michael Piefel) <[email protected]>

    * better printout for unreadable files
      (Michael Piefel) <[email protected]>

    * compensate for missing MAXPATHLEN
      (Michael Piefel) <[email protected]>

    * add wide character string length computation
      (Michael Piefel) <[email protected]>

    * Avoid infinite loops caused by bad elf alignments
      or name and description note sizes. Reported by
      (Mikael Magnusson) <[email protected]>

2004-03-09 13:55  Christos Zoulas  <[email protected]>

    * Fix possible memory leak on error and add missing regfree
      (Dmitry V. Levin) <[email protected]>

2003-12-23 12:12  Christos Zoulas  <[email protected]>

    * fix -k flag (Maciej W. Rozycki)

2003-11-18 14:10  Christos Zoulas  <[email protected]>

    * Try to give us much info as possible on corrupt elf files.
      (Willy Tarreau) <[email protected]>
    * Updated python bindings (Brett Funderburg)
       <[email protected]>

2003-11-11 15:03  Christos Zoulas  <[email protected]>

    * Include file.h first, because it includes config.h
      breaks largefile test macros otherwise.
      (Paul Eggert <[email protected]> via
       Lars Hecking <[email protected]>)

2003-10-14 21:39  Christos Zoulas  <[email protected]>

    * Python bindings (Brett Funderburg) <[email protected]>
    * Don't lookup past the end of the buffer
      (Chad Hanson) <[email protected]>
    * Add MAGIC_ERROR and api on magic_errno()

2003-10-08 12:40  Christos Zoulas  <[email protected]>

    * handle error conditions from compile as fatal
      (Antti Kantee) <[email protected]>
    * handle magic filename parsing sanely
    * more magic fixes.
    * fix a memory leak (Illes Marton) <[email protected]>
    * describe magic file handling
      (Bryan Henderson) <[email protected]>

2003-09-12 15:09  Christos Zoulas  <[email protected]>

    * update magic files.
    * remove largefile support from file.h; it breaks things on most OS's

2003-08-10 10:25  Christos Zoulas  <[email protected]>

    * fix unmapping'ing of mmaped files.

2003-07-10 12:03  Christos Zoulas  <[email protected]>

    * don't exit with -1 on error; always exit 1 (Marty Leisner)
    * restore utimes code.

2003-06-10 17:03  Christos Zoulas  <[email protected]>

    * make sure we don't access uninitialized memory.
    * pass lint
    * #ifdef __cplusplus in magic.h

2003-05-25 19:23  Christos Zoulas  <[email protected]>

    * rename cvs magic file to revision to deal with
      case insensitive filesystems.

2003-05-23 17:03  Christos Zoulas  <[email protected]>

    * documentation fixes from Michael Piefel <[email protected]>
    * magic fixes (various)
    * revert basename magic in .mgc name determination
    * buffer protection in uncompress,
      signness issues,
      close files
      Maciej W. Rozycki <[email protected]

2003-04-21 20:12  Christos Zoulas  <[email protected]>

    * fix zsh magic

2003-04-04 16:59  Christos Zoulas  <[email protected]>

    * fix operand sort order in string.

2003-04-02 17:30  Christos Zoulas  <[email protected]>

    * cleanup namespace in magic.h

2003-04-02 13:50  Christos Zoulas  <[email protected]>

    * Magic additions (Alex Ott)
    * Fix bug that broke VPATH compilation (Peter Breitenlohner)

2003-03-28 16:03  Christos Zoulas  <[email protected]>

    * remove packed attribute from magic struct.
    * make the magic struct properly aligned.
    * bump version number of compiled files to 2.

2003-03-27 13:10  Christos Zoulas  <[email protected]>

    * separate tar detection and run it before softmagic.
    * fix reversed symlink test.
    * fix version printing.
    * make separator a string instead of a char.
    * update manual page and sort options.

2003-03-26 11:00  Christos Zoulas  <[email protected]>

    * Pass lint
    * make NULL in magic_file mean stdin
    * Fix "-" argument to file to pass NULL to magic_file
    * avoid pointer casts by using memcpy
    * rename magic_buf -> magic_buffer
    * keep only the first error
    * manual page: new sentence, new line
    * fix typo in api function (magic_buf -> magic_buffer)