Sweden-Number/dlls/ntdll/unix/env.c

/*
 * Ntdll environment functions
 *
 * Copyright 1996, 1998 Alexandre Julliard
 * Copyright 2003       Eric Pouech
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#if 0
#pragma makedep unix
#endif

#include "config.h"

#include <assert.h>
#include <errno.h>
#include <locale.h>
#include <langinfo.h>
#include <fcntl.h>
#include <stdarg.h>
#include <sys/types.h>
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#ifdef HAVE_SYS_PRCTL_H
# include <sys/prctl.h>
#endif
#ifdef HAVE_PWD_H
# include <pwd.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef __APPLE__
# include <CoreFoundation/CFLocale.h>
# include <CoreFoundation/CFString.h>
#endif

#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winternl.h"
#include "winbase.h"
#include "winnls.h"
#include "wine/debug.h"
#include "unix_private.h"

WINE_DEFAULT_DEBUG_CHANNEL(environ);

extern int __wine_main_argc;
extern char **__wine_main_argv;
extern char **__wine_main_environ;
extern WCHAR **__wine_main_wargv;

static int main_argc;
static char **main_argv;
static char **main_envp;
static WCHAR **main_wargv;

static CPTABLEINFO unix_table;
static WCHAR system_locale[LOCALE_NAME_MAX_LENGTH];
static WCHAR user_locale[LOCALE_NAME_MAX_LENGTH];


#ifdef __APPLE__

/* The Apple filesystem enforces NFD so we need the compose tables to put it back into NFC */

struct norm_table
{
    WCHAR   name[13];      /* 00 file name */
    USHORT  checksum[3];   /* 1a checksum? */
    USHORT  version[4];    /* 20 Unicode version */
    USHORT  form;          /* 28 normalization form */
    USHORT  len_factor;    /* 2a factor for length estimates */
    USHORT  unknown1;      /* 2c */
    USHORT  decomp_size;   /* 2e decomposition hash size */
    USHORT  comp_size;     /* 30 composition hash size */
    USHORT  unknown2;      /* 32 */
    USHORT  classes;       /* 34 combining classes table offset */
    USHORT  props_level1;  /* 36 char properties table level 1 offset */
    USHORT  props_level2;  /* 38 char properties table level 2 offset */
    USHORT  decomp_hash;   /* 3a decomposition hash table offset */
    USHORT  decomp_map;    /* 3c decomposition character map table offset */
    USHORT  decomp_seq;    /* 3e decomposition character sequences offset */
    USHORT  comp_hash;     /* 40 composition hash table offset */
    USHORT  comp_seq;      /* 42 composition character sequences offset */
    /* BYTE[]       combining class values */
    /* BYTE[0x2200] char properties index level 1 */
    /* BYTE[]       char properties index level 2 */
    /* WORD[]       decomposition hash table */
    /* WORD[]       decomposition character map */
    /* WORD[]       decomposition character sequences */
    /* WORD[]       composition hash table */
    /* WORD[]       composition character sequences */
};

static struct norm_table *nfc_table;

static void init_unix_codepage(void)
{
    const char *dir = build_dir ? build_dir : data_dir;
    struct stat st;
    char *name;
    void *data;
    int fd;

    if (!(name = malloc( strlen(dir) + 17 ))) return;
    sprintf( name, "%s/nls/normnfc.nls", dir );
    if ((fd = open( name, O_RDONLY )) != -1)
    {
        fstat( fd, &st );
        if ((data = malloc( st.st_size )) &&
            st.st_size > 0x4000 &&
            read( fd, data, st.st_size ) == st.st_size)
        {
            nfc_table = data;
        }
        else
        {
            free( data );
        }
        close( fd );
    }
    else ERR( "failed to load %s\n", name );
    free( name );
}

static int get_utf16( const WCHAR *src, unsigned int srclen, unsigned int *ch )
{
    if (IS_HIGH_SURROGATE( src[0] ))
    {
        if (srclen <= 1) return 0;
        if (!IS_LOW_SURROGATE( src[1] )) return 0;
        *ch = 0x10000 + ((src[0] & 0x3ff) << 10) + (src[1] & 0x3ff);
        return 2;
    }
    if (IS_LOW_SURROGATE( src[0] )) return 0;
    *ch = src[0];
    return 1;
}

static void put_utf16( WCHAR *dst, unsigned int ch )
{
    if (ch >= 0x10000)
    {
        ch -= 0x10000;
        dst[0] = 0xd800 | (ch >> 10);
        dst[1] = 0xdc00 | (ch & 0x3ff);
    }
    else dst[0] = ch;
}

static BYTE rol( BYTE val, BYTE count )
{
    return (val << count) | (val >> (8 - count));
}


static BYTE get_char_props( const struct norm_table *info, unsigned int ch )
{
    const BYTE *level1 = (const BYTE *)((const USHORT *)info + info->props_level1);
    const BYTE *level2 = (const BYTE *)((const USHORT *)info + info->props_level2);
    BYTE off = level1[ch / 128];

    if (!off || off >= 0xfb) return rol( off, 5 );
    return level2[(off - 1) * 128 + ch % 128];
}

static BYTE get_combining_class( const struct norm_table *info, unsigned int c )
{
    const BYTE *classes = (const BYTE *)((const USHORT *)info + info->classes);
    BYTE class = get_char_props( info, c ) & 0x3f;

    if (class == 0x3f) return 0;
    return classes[class];
}

#define HANGUL_SBASE  0xac00
#define HANGUL_LBASE  0x1100
#define HANGUL_VBASE  0x1161
#define HANGUL_TBASE  0x11a7
#define HANGUL_LCOUNT 19
#define HANGUL_VCOUNT 21
#define HANGUL_TCOUNT 28
#define HANGUL_NCOUNT (HANGUL_VCOUNT * HANGUL_TCOUNT)
#define HANGUL_SCOUNT (HANGUL_LCOUNT * HANGUL_NCOUNT)

static unsigned int compose_hangul( unsigned int ch1, unsigned int ch2 )
{
    if (ch1 >= HANGUL_LBASE && ch1 < HANGUL_LBASE + HANGUL_LCOUNT)
    {
        int lindex = ch1 - HANGUL_LBASE;
        int vindex = ch2 - HANGUL_VBASE;
        if (vindex >= 0 && vindex < HANGUL_VCOUNT)
            return HANGUL_SBASE + (lindex * HANGUL_VCOUNT + vindex) * HANGUL_TCOUNT;
    }
    if (ch1 >= HANGUL_SBASE && ch1 < HANGUL_SBASE + HANGUL_SCOUNT)
    {
        int sindex = ch1 - HANGUL_SBASE;
        if (!(sindex % HANGUL_TCOUNT))
        {
            int tindex = ch2 - HANGUL_TBASE;
            if (tindex > 0 && tindex < HANGUL_TCOUNT) return ch1 + tindex;
        }
    }
    return 0;
}

static unsigned int compose_chars( const struct norm_table *info, unsigned int ch1, unsigned int ch2 )
{
    const USHORT *table = (const USHORT *)info + info->comp_hash;
    const WCHAR *chars = (const USHORT *)info + info->comp_seq;
    unsigned int hash, start, end, i, len, ch[3];

    hash = (ch1 + 95 * ch2) % info->comp_size;
    start = table[hash];
    end = table[hash + 1];
    while (start < end)
    {
        for (i = 0; i < 3; i++, start += len) len = get_utf16( chars + start, end - start, ch + i );
        if (ch[0] == ch1 && ch[1] == ch2) return ch[2];
    }
    return 0;
}

static unsigned int compose_string( const struct norm_table *info, WCHAR *str, unsigned int srclen )
{
    unsigned int i, ch, comp, len, start_ch = 0, last_starter = srclen;
    BYTE class, prev_class = 0;

    for (i = 0; i < srclen; i += len)
    {
        if (!(len = get_utf16( str + i, srclen - i, &ch ))) return 0;
        class = get_combining_class( info, ch );
        if (last_starter == srclen || (prev_class && prev_class >= class) ||
            (!(comp = compose_hangul( start_ch, ch )) &&
             !(comp = compose_chars( info, start_ch, ch ))))
        {
            if (!class)
            {
                last_starter = i;
                start_ch = ch;
            }
            prev_class = class;
        }
        else
        {
            int comp_len = 1 + (comp >= 0x10000);
            int start_len = 1 + (start_ch >= 0x10000);

            if (comp_len != start_len)
                memmove( str + last_starter + comp_len, str + last_starter + start_len,
                         (i - (last_starter + start_len)) * sizeof(WCHAR) );
            memmove( str + i + comp_len - start_len, str + i + len, (srclen - i - len) * sizeof(WCHAR) );
            srclen += comp_len - start_len - len;
            start_ch = comp;
            i = last_starter;
            len = comp_len;
            prev_class = 0;
            put_utf16( str + i, comp );
        }
    }
    return srclen;
}

#elif defined(__ANDROID__)  /* Android always uses UTF-8 */

static void init_unix_codepage(void) { }

#else  /* __APPLE__ || __ANDROID__ */

/* charset to codepage map, sorted by name */
static const struct { const char *name; UINT cp; } charset_names[] =
{
    { "ANSIX341968", 20127 },
    { "BIG5", 950 },
    { "BIG5HKSCS", 950 },
    { "CP1250", 1250 },
    { "CP1251", 1251 },
    { "CP1252", 1252 },
    { "CP1253", 1253 },
    { "CP1254", 1254 },
    { "CP1255", 1255 },
    { "CP1256", 1256 },
    { "CP1257", 1257 },
    { "CP1258", 1258 },
    { "CP932", 932 },
    { "CP936", 936 },
    { "CP949", 949 },
    { "CP950", 950 },
    { "EUCJP", 20932 },
    { "EUCKR", 949 },
    { "GB18030", 936  /* 54936 */ },
    { "GB2312", 936 },
    { "GBK", 936 },
    { "IBM037", 37 },
    { "IBM1026", 1026 },
    { "IBM424", 20424 },
    { "IBM437", 437 },
    { "IBM500", 500 },
    { "IBM850", 850 },
    { "IBM852", 852 },
    { "IBM855", 855 },
    { "IBM857", 857 },
    { "IBM860", 860 },
    { "IBM861", 861 },
    { "IBM862", 862 },
    { "IBM863", 863 },
    { "IBM864", 864 },
    { "IBM865", 865 },
    { "IBM866", 866 },
    { "IBM869", 869 },
    { "IBM874", 874 },
    { "IBM875", 875 },
    { "ISO88591", 28591 },
    { "ISO885913", 28603 },
    { "ISO885915", 28605 },
    { "ISO88592", 28592 },
    { "ISO88593", 28593 },
    { "ISO88594", 28594 },
    { "ISO88595", 28595 },
    { "ISO88596", 28596 },
    { "ISO88597", 28597 },
    { "ISO88598", 28598 },
    { "ISO88599", 28599 },
    { "KOI8R", 20866 },
    { "KOI8U", 21866 },
    { "TIS620", 28601 },
    { "UTF8", CP_UTF8 }
};

static void load_unix_cptable( unsigned int cp )
{
    const char *dir = build_dir ? build_dir : data_dir;
    struct stat st;
    char *name;
    void *data;
    int fd;

    if (!(name = malloc( strlen(dir) + 22 ))) return;
    sprintf( name, "%s/nls/c_%03u.nls", dir, cp );
    if ((fd = open( name, O_RDONLY )) != -1)
    {
        fstat( fd, &st );
        if ((data = malloc( st.st_size )) && st.st_size > 0x10000 &&
            read( fd, data, st.st_size ) == st.st_size)
        {
            RtlInitCodePageTable( data, &unix_table );
        }
        else
        {
            free( data );
        }
        close( fd );
    }
    else ERR( "failed to load %s\n", name );
    free( name );
}

static void init_unix_codepage(void)
{
    char charset_name[16];
    const char *name;
    size_t i, j;
    int min = 0, max = ARRAY_SIZE(charset_names) - 1;

    setlocale( LC_CTYPE, "" );
    if (!(name = nl_langinfo( CODESET ))) return;

    /* remove punctuation characters from charset name */
    for (i = j = 0; name[i] && j < sizeof(charset_name)-1; i++)
    {
        if (name[i] >= '0' && name[i] <= '9') charset_name[j++] = name[i];
        else if (name[i] >= 'A' && name[i] <= 'Z') charset_name[j++] = name[i];
        else if (name[i] >= 'a' && name[i] <= 'z') charset_name[j++] = name[i] + ('A' - 'a');
    }
    charset_name[j] = 0;

    while (min <= max)
    {
        int pos = (min + max) / 2;
        int res = strcmp( charset_names[pos].name, charset_name );
        if (!res)
        {
            if (charset_names[pos].cp != CP_UTF8) load_unix_cptable( charset_names[pos].cp );
            return;
        }
        if (res > 0) max = pos - 1;
        else min = pos + 1;
    }
    ERR( "unrecognized charset '%s'\n", name );
}

#endif  /* __APPLE__ || __ANDROID__ */


/***********************************************************************
 *           is_special_env_var
 *
 * Check if an environment variable needs to be handled specially when
 * passed through the Unix environment (i.e. prefixed with "WINE").
 */
static inline BOOL is_special_env_var( const char *var )
{
    return (!strncmp( var, "PATH=", sizeof("PATH=")-1 ) ||
            !strncmp( var, "PWD=", sizeof("PWD=")-1 ) ||
            !strncmp( var, "HOME=", sizeof("HOME=")-1 ) ||
            !strncmp( var, "TEMP=", sizeof("TEMP=")-1 ) ||
            !strncmp( var, "TMP=", sizeof("TMP=")-1 ) ||
            !strncmp( var, "QT_", sizeof("QT_")-1 ) ||
            !strncmp( var, "VK_", sizeof("VK_")-1 ));
}


/******************************************************************
 *      ntdll_umbstowcs
 */
DWORD ntdll_umbstowcs( const char *src, DWORD srclen, WCHAR *dst, DWORD dstlen )
{
    DWORD reslen;

    if (unix_table.CodePage)
        RtlCustomCPToUnicodeN( &unix_table, dst, dstlen * sizeof(WCHAR), &reslen, src, srclen );
    else
        RtlUTF8ToUnicodeN( dst, dstlen * sizeof(WCHAR), &reslen, src, srclen );

    reslen /= sizeof(WCHAR);
#ifdef __APPLE__  /* work around broken Mac OS X filesystem that enforces NFD */
    if (reslen && nfc_table) reslen = compose_string( nfc_table, dst, reslen );
#endif
    return reslen;
}


/***********************************************************************
 *           set_process_name
 *
 * Change the process name in the ps output.
 */
static void set_process_name( int argc, char *argv[] )
{
    BOOL shift_strings;
    char *p, *name;
    int i;

#ifdef HAVE_SETPROCTITLE
    setproctitle("-%s", argv[1]);
    shift_strings = FALSE;
#else
    p = argv[0];

    shift_strings = (argc >= 2);
    for (i = 1; i < argc; i++)
    {
        p += strlen(p) + 1;
        if (p != argv[i])
        {
            shift_strings = FALSE;
            break;
        }
    }
#endif

    if (shift_strings)
    {
        int offset = argv[1] - argv[0];
        char *end = argv[argc-1] + strlen(argv[argc-1]) + 1;
        memmove( argv[0], argv[1], end - argv[1] );
        memset( end - offset, 0, offset );
        for (i = 1; i < argc; i++)
            argv[i-1] = argv[i] - offset;
        argv[i-1] = NULL;
    }
    else
    {
        /* remove argv[0] */
        memmove( argv, argv + 1, argc * sizeof(argv[0]) );
    }

    name = argv[0];
    if ((p = strrchr( name, '\\' ))) name = p + 1;
    if ((p = strrchr( name, '/' ))) name = p + 1;

#if defined(HAVE_SETPROGNAME)
    setprogname( name );
#endif

#ifdef HAVE_PRCTL
#ifndef PR_SET_NAME
# define PR_SET_NAME 15
#endif
    prctl( PR_SET_NAME, name );
#endif  /* HAVE_PRCTL */
}


/***********************************************************************
 *              build_wargv
 *
 * Build the Unicode argv array.
 */
static WCHAR **build_wargv( char **argv )
{
    int argc;
    WCHAR *p, **wargv;
    DWORD total = 0;

    for (argc = 0; argv[argc]; argc++) total += strlen(argv[argc]) + 1;

    wargv = malloc( total * sizeof(WCHAR) + (argc + 1) * sizeof(*wargv) );
    p = (WCHAR *)(wargv + argc + 1);
    for (argc = 0; argv[argc]; argc++)
    {
        DWORD reslen = ntdll_umbstowcs( argv[argc], strlen(argv[argc]) + 1, p, total );
        wargv[argc] = p;
        p += reslen;
        total -= reslen;
    }
    wargv[argc] = NULL;
    return wargv;
}


/* Unix format is: lang[_country][.charset][@modifier]
 * Windows format is: lang[-script][-country][_modifier] */
static BOOL unix_to_win_locale( const char *unix_name, WCHAR *win_name )
{
    static const WCHAR sepW[] = {'_','.','@',0};
    static const WCHAR posixW[] = {'P','O','S','I','X',0};
    static const WCHAR cW[] = {'C',0};
    static const WCHAR euroW[] = {'e','u','r','o',0};
    static const WCHAR latinW[] = {'l','a','t','i','n',0};
    static const WCHAR latnW[] = {'-','L','a','t','n',0};
    static const WCHAR enUSW[] = {'e','n','-','U','S',0};
    WCHAR buffer[LOCALE_NAME_MAX_LENGTH];
    WCHAR *p, *country = NULL, *modifier = NULL;
    DWORD len;

    if (!unix_name || !unix_name[0] || !strcmp( unix_name, "C" ))
    {
        unix_name = getenv( "LC_ALL" );
        if (!unix_name || !unix_name[0]) return FALSE;
    }

    len = ntdll_umbstowcs( unix_name, strlen(unix_name), buffer, ARRAY_SIZE(buffer) );
    if (len == ARRAY_SIZE(buffer)) return FALSE;
    buffer[len] = 0;

    if (!(p = wcspbrk( buffer, sepW )))
    {
        if (!wcscmp( buffer, posixW ) || !wcscmp( buffer, cW ))
            wcscpy( win_name, enUSW );
        else
            wcscpy( win_name, buffer );
        return TRUE;
    }

    if (*p == '_')
    {
        *p++ = 0;
        country = p;
        p = wcspbrk( p, sepW + 1 );
    }
    if (p && *p == '.')
    {
        *p++ = 0;
        /* charset, ignore */
        p = wcschr( p, '@' );
    }
    if (p)
    {
        *p++ = 0;
        modifier = p;
    }

    /* rebuild a Windows name */

    wcscpy( win_name, buffer );
    if (modifier)
    {
        if (!wcscmp( modifier, latinW )) wcscat( win_name, latnW );
        else if (!wcscmp( modifier, euroW )) {} /* ignore */
        else return FALSE;
    }
    if (country)
    {
        p = win_name + wcslen(win_name);
        *p++ = '-';
        wcscpy( p, country );
    }
    return TRUE;
}


/******************************************************************
 *		init_locale
 */
static void init_locale(void)
{
    setlocale( LC_ALL, "" );
    if (!unix_to_win_locale( setlocale( LC_CTYPE, NULL ), system_locale )) system_locale[0] = 0;
    if (!unix_to_win_locale( setlocale( LC_MESSAGES, NULL ), user_locale )) user_locale[0] = 0;

#ifdef __APPLE__
    if (!system_locale[0])
    {
        CFLocaleRef locale = CFLocaleCopyCurrent();
        CFStringRef lang = CFLocaleGetValue( locale, kCFLocaleLanguageCode );
        CFStringRef country = CFLocaleGetValue( locale, kCFLocaleCountryCode );
        CFStringRef locale_string;

        if (country)
            locale_string = CFStringCreateWithFormat(NULL, NULL, CFSTR("%@_%@"), lang, country);
        else
            locale_string = CFStringCreateCopy(NULL, lang);

        CFStringGetCString(locale_string, system_locale, sizeof(system_locale), kCFStringEncodingUTF8);
        CFRelease(locale);
        CFRelease(locale_string);
    }
    if (!user_locale[0])
    {
        /* Retrieve the preferred language as chosen in System Preferences. */
        CFArrayRef preferred_langs = CFLocaleCopyPreferredLanguages();
        if (preferred_langs && CFArrayGetCount( preferred_langs ))
        {
            CFStringRef preferred_lang = CFArrayGetValueAtIndex( preferred_langs, 0 );
            CFDictionaryRef components = CFLocaleCreateComponentsFromLocaleIdentifier( NULL, preferred_lang );
            if (components)
            {
                CFStringRef lang = CFDictionaryGetValue( components, kCFLocaleLanguageCode );
                CFStringRef country = CFDictionaryGetValue( components, kCFLocaleCountryCode );
                CFLocaleRef locale = NULL;
                CFStringRef locale_string;

                if (!country)
                {
                    locale = CFLocaleCopyCurrent();
                    country = CFLocaleGetValue( locale, kCFLocaleCountryCode );
                }
                if (country)
                    locale_string = CFStringCreateWithFormat( NULL, NULL, CFSTR("%@_%@"), lang, country );
                else
                    locale_string = CFStringCreateCopy( NULL, lang );
                CFStringGetCString( locale_string, user_locale, sizeof(user_locale), kCFStringEncodingUTF8 );
                CFRelease( locale_string );
                if (locale) CFRelease( locale );
                CFRelease( components );
            }
        }
        if (preferred_langs) CFRelease( preferred_langs );
    }
#endif
}


/***********************************************************************
 *              init_environment
 */
void init_environment( int argc, char *argv[], char *envp[] )
{
    init_unix_codepage();
    init_locale();
    set_process_name( argc, argv );
    __wine_main_argc = main_argc = argc;
    __wine_main_argv = main_argv = argv;
    __wine_main_wargv = main_wargv = build_wargv( argv );
    __wine_main_environ = main_envp = envp;
}


/*************************************************************************
 *		get_main_args
 *
 * Return the initial arguments.
 */
void CDECL get_main_args( int *argc, char **argv[], char **envp[] )
{
    *argc  = main_argc;
    *argv  = main_argv;
    *envp  = main_envp;
}


/*************************************************************************
 *		get_initial_environment
 *
 * Return the initial environment.
 */
NTSTATUS CDECL get_initial_environment( WCHAR **wargv[], WCHAR *env, SIZE_T *size )
{
    char **e;
    WCHAR *ptr = env, *end = env + *size;

    *wargv = main_wargv;
    for (e = main_envp; *e && ptr < end; e++)
    {
        char *str = *e;

        /* skip Unix special variables and use the Wine variants instead */
        if (!strncmp( str, "WINE", 4 ))
        {
            if (is_special_env_var( str + 4 )) str += 4;
            else if (!strncmp( str, "WINEPRELOADRESERVE=", 19 )) continue;  /* skip it */
        }
        else if (is_special_env_var( str )) continue;  /* skip it */

        ptr += ntdll_umbstowcs( str, strlen(str) + 1, ptr, end - ptr );
    }

    if (ptr < end)
    {
        *ptr++ = 0;
        *size = ptr - env;
        return STATUS_SUCCESS;
    }

    /* estimate needed size */
    for (e = main_envp, *size = 1; *e; e++) if (!is_special_env_var( *e )) *size += strlen(*e) + 1;
    return STATUS_BUFFER_TOO_SMALL;
}


/*************************************************************************
 *		get_unix_codepage
 *
 * Return the Unix codepage data.
 */
void CDECL get_unix_codepage( CPTABLEINFO *table )
{
    *table = unix_table;
}


/*************************************************************************
 *		get_locales
 *
 * Return the system and user locales. Buffers must be at least LOCALE_NAME_MAX_LENGTH chars long.
 */
void CDECL get_locales( WCHAR *sys, WCHAR *user )
{
    wcscpy( sys, system_locale );
    wcscpy( user, user_locale );
}