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putty/windows/winstore.c

869 строки
23 KiB
C
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/*
* winstore.c: Windows-specific implementation of the interface
* defined in storage.h.
*/
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include "putty.h"
#include "storage.h"
#include <shlobj.h>
#ifndef CSIDL_APPDATA
#define CSIDL_APPDATA 0x001a
#endif
#ifndef CSIDL_LOCAL_APPDATA
#define CSIDL_LOCAL_APPDATA 0x001c
#endif
static const char *const reg_jumplist_key = PUTTY_REG_POS "\\Jumplist";
static const char *const reg_jumplist_value = "Recent sessions";
static const char *const puttystr = PUTTY_REG_POS "\\Sessions";
static const char hex[16] = "0123456789ABCDEF";
static int tried_shgetfolderpath = FALSE;
static HMODULE shell32_module = NULL;
DECL_WINDOWS_FUNCTION(static, HRESULT, SHGetFolderPathA,
(HWND, int, HANDLE, DWORD, LPSTR));
static void mungestr(const char *in, char *out)
{
int candot = 0;
while (*in) {
if (*in == ' ' || *in == '\\' || *in == '*' || *in == '?' ||
*in == '%' || *in < ' ' || *in > '~' || (*in == '.'
&& !candot)) {
*out++ = '%';
*out++ = hex[((unsigned char) *in) >> 4];
*out++ = hex[((unsigned char) *in) & 15];
} else
*out++ = *in;
in++;
candot = 1;
}
*out = '\0';
return;
}
static void unmungestr(const char *in, char *out, int outlen)
{
while (*in) {
if (*in == '%' && in[1] && in[2]) {
int i, j;
i = in[1] - '0';
i -= (i > 9 ? 7 : 0);
j = in[2] - '0';
j -= (j > 9 ? 7 : 0);
*out++ = (i << 4) + j;
if (!--outlen)
return;
in += 3;
} else {
*out++ = *in++;
if (!--outlen)
return;
}
}
*out = '\0';
return;
}
void *open_settings_w(const char *sessionname, char **errmsg)
{
HKEY subkey1, sesskey;
int ret;
char *p;
*errmsg = NULL;
if (!sessionname || !*sessionname)
sessionname = "Default Settings";
p = snewn(3 * strlen(sessionname) + 1, char);
mungestr(sessionname, p);
ret = RegCreateKey(HKEY_CURRENT_USER, puttystr, &subkey1);
if (ret != ERROR_SUCCESS) {
sfree(p);
*errmsg = dupprintf("Unable to create registry key\n"
"HKEY_CURRENT_USER\\%s", puttystr);
return NULL;
}
ret = RegCreateKey(subkey1, p, &sesskey);
RegCloseKey(subkey1);
if (ret != ERROR_SUCCESS) {
*errmsg = dupprintf("Unable to create registry key\n"
"HKEY_CURRENT_USER\\%s\\%s", puttystr, p);
sfree(p);
return NULL;
}
sfree(p);
return (void *) sesskey;
}
void write_setting_s(void *handle, const char *key, const char *value)
{
if (handle)
RegSetValueEx((HKEY) handle, key, 0, REG_SZ, value,
1 + strlen(value));
}
void write_setting_i(void *handle, const char *key, int value)
{
if (handle)
RegSetValueEx((HKEY) handle, key, 0, REG_DWORD,
(CONST BYTE *) &value, sizeof(value));
}
void close_settings_w(void *handle)
{
RegCloseKey((HKEY) handle);
}
void *open_settings_r(const char *sessionname)
{
HKEY subkey1, sesskey;
char *p;
if (!sessionname || !*sessionname)
sessionname = "Default Settings";
p = snewn(3 * strlen(sessionname) + 1, char);
mungestr(sessionname, p);
if (RegOpenKey(HKEY_CURRENT_USER, puttystr, &subkey1) != ERROR_SUCCESS) {
sesskey = NULL;
} else {
if (RegOpenKey(subkey1, p, &sesskey) != ERROR_SUCCESS) {
sesskey = NULL;
}
RegCloseKey(subkey1);
}
sfree(p);
return (void *) sesskey;
}
char *read_setting_s(void *handle, const char *key)
{
DWORD type, size;
char *ret;
if (!handle)
return NULL;
/* Find out the type and size of the data. */
if (RegQueryValueEx((HKEY) handle, key, 0,
&type, NULL, &size) != ERROR_SUCCESS ||
type != REG_SZ)
return NULL;
ret = snewn(size+1, char);
if (RegQueryValueEx((HKEY) handle, key, 0,
&type, ret, &size) != ERROR_SUCCESS ||
type != REG_SZ) {
sfree(ret);
return NULL;
}
return ret;
}
int read_setting_i(void *handle, const char *key, int defvalue)
{
DWORD type, val, size;
size = sizeof(val);
if (!handle ||
RegQueryValueEx((HKEY) handle, key, 0, &type,
(BYTE *) &val, &size) != ERROR_SUCCESS ||
size != sizeof(val) || type != REG_DWORD)
return defvalue;
else
return val;
}
FontSpec *read_setting_fontspec(void *handle, const char *name)
{
char *settingname;
char *fontname;
FontSpec *ret;
int isbold, height, charset;
fontname = read_setting_s(handle, name);
if (!fontname)
return NULL;
settingname = dupcat(name, "IsBold", NULL);
isbold = read_setting_i(handle, settingname, -1);
sfree(settingname);
if (isbold == -1) {
sfree(fontname);
return NULL;
}
settingname = dupcat(name, "CharSet", NULL);
charset = read_setting_i(handle, settingname, -1);
sfree(settingname);
if (charset == -1) {
sfree(fontname);
return NULL;
}
settingname = dupcat(name, "Height", NULL);
height = read_setting_i(handle, settingname, INT_MIN);
sfree(settingname);
if (height == INT_MIN) {
sfree(fontname);
return NULL;
}
ret = fontspec_new(fontname, isbold, height, charset);
sfree(fontname);
return ret;
}
void write_setting_fontspec(void *handle, const char *name, FontSpec *font)
{
char *settingname;
write_setting_s(handle, name, font->name);
settingname = dupcat(name, "IsBold", NULL);
write_setting_i(handle, settingname, font->isbold);
sfree(settingname);
settingname = dupcat(name, "CharSet", NULL);
write_setting_i(handle, settingname, font->charset);
sfree(settingname);
settingname = dupcat(name, "Height", NULL);
write_setting_i(handle, settingname, font->height);
sfree(settingname);
}
Filename *read_setting_filename(void *handle, const char *name)
{
char *tmp = read_setting_s(handle, name);
if (tmp) {
Filename *ret = filename_from_str(tmp);
sfree(tmp);
return ret;
} else
return NULL;
}
void write_setting_filename(void *handle, const char *name, Filename *result)
{
write_setting_s(handle, name, result->path);
}
void close_settings_r(void *handle)
{
RegCloseKey((HKEY) handle);
}
void del_settings(const char *sessionname)
{
HKEY subkey1;
char *p;
if (RegOpenKey(HKEY_CURRENT_USER, puttystr, &subkey1) != ERROR_SUCCESS)
return;
p = snewn(3 * strlen(sessionname) + 1, char);
mungestr(sessionname, p);
RegDeleteKey(subkey1, p);
sfree(p);
RegCloseKey(subkey1);
remove_session_from_jumplist(sessionname);
}
struct enumsettings {
HKEY key;
int i;
};
void *enum_settings_start(void)
{
struct enumsettings *ret;
HKEY key;
if (RegOpenKey(HKEY_CURRENT_USER, puttystr, &key) != ERROR_SUCCESS)
return NULL;
ret = snew(struct enumsettings);
if (ret) {
ret->key = key;
ret->i = 0;
}
return ret;
}
char *enum_settings_next(void *handle, char *buffer, int buflen)
{
struct enumsettings *e = (struct enumsettings *) handle;
char *otherbuf;
otherbuf = snewn(3 * buflen, char);
if (RegEnumKey(e->key, e->i++, otherbuf, 3 * buflen) == ERROR_SUCCESS) {
unmungestr(otherbuf, buffer, buflen);
sfree(otherbuf);
return buffer;
} else {
sfree(otherbuf);
return NULL;
}
}
void enum_settings_finish(void *handle)
{
struct enumsettings *e = (struct enumsettings *) handle;
RegCloseKey(e->key);
sfree(e);
}
static void hostkey_regname(char *buffer, const char *hostname,
int port, const char *keytype)
{
int len;
strcpy(buffer, keytype);
strcat(buffer, "@");
len = strlen(buffer);
len += sprintf(buffer + len, "%d:", port);
mungestr(hostname, buffer + strlen(buffer));
}
int verify_host_key(const char *hostname, int port,
const char *keytype, const char *key)
{
char *otherstr, *regname;
int len;
HKEY rkey;
DWORD readlen;
DWORD type;
int ret, compare;
len = 1 + strlen(key);
/*
* Now read a saved key in from the registry and see what it
* says.
*/
regname = snewn(3 * (strlen(hostname) + strlen(keytype)) + 15, char);
hostkey_regname(regname, hostname, port, keytype);
if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS "\\SshHostKeys",
&rkey) != ERROR_SUCCESS) {
sfree(regname);
return 1; /* key does not exist in registry */
}
readlen = len;
otherstr = snewn(len, char);
ret = RegQueryValueEx(rkey, regname, NULL, &type, otherstr, &readlen);
if (ret != ERROR_SUCCESS && ret != ERROR_MORE_DATA &&
!strcmp(keytype, "rsa")) {
/*
* Key didn't exist. If the key type is RSA, we'll try
* another trick, which is to look up the _old_ key format
* under just the hostname and translate that.
*/
char *justhost = regname + 1 + strcspn(regname, ":");
char *oldstyle = snewn(len + 10, char); /* safety margin */
readlen = len;
ret = RegQueryValueEx(rkey, justhost, NULL, &type,
oldstyle, &readlen);
if (ret == ERROR_SUCCESS && type == REG_SZ) {
/*
* The old format is two old-style bignums separated by
* a slash. An old-style bignum is made of groups of
* four hex digits: digits are ordered in sensible
* (most to least significant) order within each group,
* but groups are ordered in silly (least to most)
* order within the bignum. The new format is two
* ordinary C-format hex numbers (0xABCDEFG...XYZ, with
* A nonzero except in the special case 0x0, which
* doesn't appear anyway in RSA keys) separated by a
* comma. All hex digits are lowercase in both formats.
*/
char *p = otherstr;
char *q = oldstyle;
int i, j;
for (i = 0; i < 2; i++) {
int ndigits, nwords;
*p++ = '0';
*p++ = 'x';
ndigits = strcspn(q, "/"); /* find / or end of string */
nwords = ndigits / 4;
/* now trim ndigits to remove leading zeros */
while (q[(ndigits - 1) ^ 3] == '0' && ndigits > 1)
ndigits--;
/* now move digits over to new string */
for (j = 0; j < ndigits; j++)
p[ndigits - 1 - j] = q[j ^ 3];
p += ndigits;
q += nwords * 4;
if (*q) {
q++; /* eat the slash */
*p++ = ','; /* add a comma */
}
*p = '\0'; /* terminate the string */
}
/*
* Now _if_ this key matches, we'll enter it in the new
* format. If not, we'll assume something odd went
* wrong, and hyper-cautiously do nothing.
*/
if (!strcmp(otherstr, key))
RegSetValueEx(rkey, regname, 0, REG_SZ, otherstr,
strlen(otherstr) + 1);
}
sfree(oldstyle);
}
RegCloseKey(rkey);
compare = strcmp(otherstr, key);
sfree(otherstr);
sfree(regname);
if (ret == ERROR_MORE_DATA ||
(ret == ERROR_SUCCESS && type == REG_SZ && compare))
return 2; /* key is different in registry */
else if (ret != ERROR_SUCCESS || type != REG_SZ)
return 1; /* key does not exist in registry */
else
return 0; /* key matched OK in registry */
}
void store_host_key(const char *hostname, int port,
const char *keytype, const char *key)
{
char *regname;
HKEY rkey;
regname = snewn(3 * (strlen(hostname) + strlen(keytype)) + 15, char);
hostkey_regname(regname, hostname, port, keytype);
if (RegCreateKey(HKEY_CURRENT_USER, PUTTY_REG_POS "\\SshHostKeys",
&rkey) == ERROR_SUCCESS) {
RegSetValueEx(rkey, regname, 0, REG_SZ, key, strlen(key) + 1);
RegCloseKey(rkey);
} /* else key does not exist in registry */
sfree(regname);
}
/*
* Open (or delete) the random seed file.
*/
enum { DEL, OPEN_R, OPEN_W };
static int try_random_seed(char const *path, int action, HANDLE *ret)
{
if (action == DEL) {
if (!DeleteFile(path) && GetLastError() != ERROR_FILE_NOT_FOUND) {
nonfatal("Unable to delete '%s': %s", path,
win_strerror(GetLastError()));
}
*ret = INVALID_HANDLE_VALUE;
return FALSE; /* so we'll do the next ones too */
}
*ret = CreateFile(path,
action == OPEN_W ? GENERIC_WRITE : GENERIC_READ,
action == OPEN_W ? 0 : (FILE_SHARE_READ |
FILE_SHARE_WRITE),
NULL,
action == OPEN_W ? CREATE_ALWAYS : OPEN_EXISTING,
action == OPEN_W ? FILE_ATTRIBUTE_NORMAL : 0,
NULL);
return (*ret != INVALID_HANDLE_VALUE);
}
static HANDLE access_random_seed(int action)
{
HKEY rkey;
DWORD type, size;
HANDLE rethandle;
char seedpath[2 * MAX_PATH + 10] = "\0";
/*
* Iterate over a selection of possible random seed paths until
* we find one that works.
*
* We do this iteration separately for reading and writing,
* meaning that we will automatically migrate random seed files
* if a better location becomes available (by reading from the
* best location in which we actually find one, and then
* writing to the best location in which we can _create_ one).
*/
/*
* First, try the location specified by the user in the
* Registry, if any.
*/
size = sizeof(seedpath);
if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS, &rkey) ==
ERROR_SUCCESS) {
int ret = RegQueryValueEx(rkey, "RandSeedFile",
0, &type, seedpath, &size);
if (ret != ERROR_SUCCESS || type != REG_SZ)
seedpath[0] = '\0';
RegCloseKey(rkey);
if (*seedpath && try_random_seed(seedpath, action, &rethandle))
return rethandle;
}
/*
* Next, try the user's local Application Data directory,
* followed by their non-local one. This is found using the
* SHGetFolderPath function, which won't be present on all
* versions of Windows.
*/
if (!tried_shgetfolderpath) {
/* This is likely only to bear fruit on systems with IE5+
* installed, or WinMe/2K+. There is some faffing with
* SHFOLDER.DLL we could do to try to find an equivalent
* on older versions of Windows if we cared enough.
* However, the invocation below requires IE5+ anyway,
* so stuff that. */
shell32_module = load_system32_dll("shell32.dll");
GET_WINDOWS_FUNCTION(shell32_module, SHGetFolderPathA);
tried_shgetfolderpath = TRUE;
}
if (p_SHGetFolderPathA) {
if (SUCCEEDED(p_SHGetFolderPathA(NULL, CSIDL_LOCAL_APPDATA,
NULL, SHGFP_TYPE_CURRENT, seedpath))) {
strcat(seedpath, "\\PUTTY.RND");
if (try_random_seed(seedpath, action, &rethandle))
return rethandle;
}
if (SUCCEEDED(p_SHGetFolderPathA(NULL, CSIDL_APPDATA,
NULL, SHGFP_TYPE_CURRENT, seedpath))) {
strcat(seedpath, "\\PUTTY.RND");
if (try_random_seed(seedpath, action, &rethandle))
return rethandle;
}
}
/*
* Failing that, try %HOMEDRIVE%%HOMEPATH% as a guess at the
* user's home directory.
*/
{
int len, ret;
len =
GetEnvironmentVariable("HOMEDRIVE", seedpath,
sizeof(seedpath));
ret =
GetEnvironmentVariable("HOMEPATH", seedpath + len,
sizeof(seedpath) - len);
if (ret != 0) {
strcat(seedpath, "\\PUTTY.RND");
if (try_random_seed(seedpath, action, &rethandle))
return rethandle;
}
}
/*
* And finally, fall back to C:\WINDOWS.
*/
GetWindowsDirectory(seedpath, sizeof(seedpath));
strcat(seedpath, "\\PUTTY.RND");
if (try_random_seed(seedpath, action, &rethandle))
return rethandle;
/*
* If even that failed, give up.
*/
return INVALID_HANDLE_VALUE;
}
void read_random_seed(noise_consumer_t consumer)
{
HANDLE seedf = access_random_seed(OPEN_R);
if (seedf != INVALID_HANDLE_VALUE) {
while (1) {
char buf[1024];
DWORD len;
if (ReadFile(seedf, buf, sizeof(buf), &len, NULL) && len)
consumer(buf, len);
else
break;
}
CloseHandle(seedf);
}
}
void write_random_seed(void *data, int len)
{
HANDLE seedf = access_random_seed(OPEN_W);
if (seedf != INVALID_HANDLE_VALUE) {
DWORD lenwritten;
WriteFile(seedf, data, len, &lenwritten, NULL);
CloseHandle(seedf);
}
}
/*
* Internal function supporting the jump list registry code. All the
* functions to add, remove and read the list have substantially
* similar content, so this is a generalisation of all of them which
* transforms the list in the registry by prepending 'add' (if
* non-null), removing 'rem' from what's left (if non-null), and
* returning the resulting concatenated list of strings in 'out' (if
* non-null).
*/
static int transform_jumplist_registry
(const char *add, const char *rem, char **out)
{
int ret;
HKEY pjumplist_key, psettings_tmp;
DWORD type;
int value_length;
char *old_value, *new_value;
char *piterator_old, *piterator_new, *piterator_tmp;
ret = RegCreateKeyEx(HKEY_CURRENT_USER, reg_jumplist_key, 0, NULL,
REG_OPTION_NON_VOLATILE, (KEY_READ | KEY_WRITE), NULL,
&pjumplist_key, NULL);
if (ret != ERROR_SUCCESS) {
return JUMPLISTREG_ERROR_KEYOPENCREATE_FAILURE;
}
/* Get current list of saved sessions in the registry. */
value_length = 200;
old_value = snewn(value_length, char);
ret = RegQueryValueEx(pjumplist_key, reg_jumplist_value, NULL, &type,
old_value, &value_length);
/* When the passed buffer is too small, ERROR_MORE_DATA is
* returned and the required size is returned in the length
* argument. */
if (ret == ERROR_MORE_DATA) {
sfree(old_value);
old_value = snewn(value_length, char);
ret = RegQueryValueEx(pjumplist_key, reg_jumplist_value, NULL, &type,
old_value, &value_length);
}
if (ret == ERROR_FILE_NOT_FOUND) {
/* Value doesn't exist yet. Start from an empty value. */
*old_value = '\0';
*(old_value + 1) = '\0';
} else if (ret != ERROR_SUCCESS) {
/* Some non-recoverable error occurred. */
sfree(old_value);
RegCloseKey(pjumplist_key);
return JUMPLISTREG_ERROR_VALUEREAD_FAILURE;
} else if (type != REG_MULTI_SZ) {
/* The value present in the registry has the wrong type: we
* try to delete it and start from an empty value. */
ret = RegDeleteValue(pjumplist_key, reg_jumplist_value);
if (ret != ERROR_SUCCESS) {
sfree(old_value);
RegCloseKey(pjumplist_key);
return JUMPLISTREG_ERROR_VALUEREAD_FAILURE;
}
*old_value = '\0';
*(old_value + 1) = '\0';
}
/* Check validity of registry data: REG_MULTI_SZ value must end
* with \0\0. */
piterator_tmp = old_value;
while (((piterator_tmp - old_value) < (value_length - 1)) &&
!(*piterator_tmp == '\0' && *(piterator_tmp+1) == '\0')) {
++piterator_tmp;
}
if ((piterator_tmp - old_value) >= (value_length-1)) {
/* Invalid value. Start from an empty value. */
*old_value = '\0';
*(old_value + 1) = '\0';
}
/*
* Modify the list, if we're modifying.
*/
if (add || rem) {
/* Walk through the existing list and construct the new list of
* saved sessions. */
new_value = snewn(value_length + (add ? strlen(add) + 1 : 0), char);
piterator_new = new_value;
piterator_old = old_value;
/* First add the new item to the beginning of the list. */
if (add) {
strcpy(piterator_new, add);
piterator_new += strlen(piterator_new) + 1;
}
/* Now add the existing list, taking care to leave out the removed
* item, if it was already in the existing list. */
while (*piterator_old != '\0') {
if (!rem || strcmp(piterator_old, rem) != 0) {
/* Check if this is a valid session, otherwise don't add. */
psettings_tmp = open_settings_r(piterator_old);
if (psettings_tmp != NULL) {
close_settings_r(psettings_tmp);
strcpy(piterator_new, piterator_old);
piterator_new += strlen(piterator_new) + 1;
}
}
piterator_old += strlen(piterator_old) + 1;
}
*piterator_new = '\0';
++piterator_new;
/* Save the new list to the registry. */
ret = RegSetValueEx(pjumplist_key, reg_jumplist_value, 0, REG_MULTI_SZ,
new_value, piterator_new - new_value);
sfree(old_value);
old_value = new_value;
} else
ret = ERROR_SUCCESS;
/*
* Either return or free the result.
*/
if (out && ret == ERROR_SUCCESS)
*out = old_value;
else
sfree(old_value);
/* Clean up and return. */
RegCloseKey(pjumplist_key);
if (ret != ERROR_SUCCESS) {
return JUMPLISTREG_ERROR_VALUEWRITE_FAILURE;
} else {
return JUMPLISTREG_OK;
}
}
/* Adds a new entry to the jumplist entries in the registry. */
int add_to_jumplist_registry(const char *item)
{
return transform_jumplist_registry(item, item, NULL);
}
/* Removes an item from the jumplist entries in the registry. */
int remove_from_jumplist_registry(const char *item)
{
return transform_jumplist_registry(NULL, item, NULL);
}
/* Returns the jumplist entries from the registry. Caller must free
* the returned pointer. */
char *get_jumplist_registry_entries (void)
{
char *list_value;
if (transform_jumplist_registry(NULL,NULL,&list_value) != JUMPLISTREG_OK) {
list_value = snewn(2, char);
*list_value = '\0';
*(list_value + 1) = '\0';
}
return list_value;
}
/*
* Recursively delete a registry key and everything under it.
*/
static void registry_recursive_remove(HKEY key)
{
DWORD i;
char name[MAX_PATH + 1];
HKEY subkey;
i = 0;
while (RegEnumKey(key, i, name, sizeof(name)) == ERROR_SUCCESS) {
if (RegOpenKey(key, name, &subkey) == ERROR_SUCCESS) {
registry_recursive_remove(subkey);
RegCloseKey(subkey);
}
RegDeleteKey(key, name);
}
}
void cleanup_all(void)
{
HKEY key;
int ret;
char name[MAX_PATH + 1];
/* ------------------------------------------------------------
* Wipe out the random seed file, in all of its possible
* locations.
*/
access_random_seed(DEL);
/* ------------------------------------------------------------
* Ask Windows to delete any jump list information associated
* with this installation of PuTTY.
*/
clear_jumplist();
/* ------------------------------------------------------------
* Destroy all registry information associated with PuTTY.
*/
/*
* Open the main PuTTY registry key and remove everything in it.
*/
if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS, &key) ==
ERROR_SUCCESS) {
registry_recursive_remove(key);
RegCloseKey(key);
}
/*
* Now open the parent key and remove the PuTTY main key. Once
* we've done that, see if the parent key has any other
* children.
*/
if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_PARENT,
&key) == ERROR_SUCCESS) {
RegDeleteKey(key, PUTTY_REG_PARENT_CHILD);
ret = RegEnumKey(key, 0, name, sizeof(name));
RegCloseKey(key);
/*
* If the parent key had no other children, we must delete
* it in its turn. That means opening the _grandparent_
* key.
*/
if (ret != ERROR_SUCCESS) {
if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_GPARENT,
&key) == ERROR_SUCCESS) {
RegDeleteKey(key, PUTTY_REG_GPARENT_CHILD);
RegCloseKey(key);
}
}
}
/*
* Now we're done.
*/
}
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку