summaryrefslogtreecommitdiff
path: root/sql/winservice.c
blob: 1cf9f8d78238919041075bf6903554eca3164d92 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
/*
   Copyright (c) 2011, 2012, Monty Program Ab

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

/*
  Get Properties of an existing mysqld Windows service 
*/

#include <windows.h>
#include <winsvc.h>
#include "winservice.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <shellapi.h>

/*
  Get version from an executable file
*/
void get_file_version(const char *path, int *major, int *minor, int *patch)
{
  DWORD version_handle;
  char *ver= 0;
  VS_FIXEDFILEINFO info;
  UINT len;
  DWORD size;
  void *p;
  *major= *minor= *patch= 0;

  size= GetFileVersionInfoSize(path, &version_handle);
  if (size == 0) 
    return;
  ver= (char *)malloc(size);
  if(!GetFileVersionInfo(path, version_handle, size, ver))
    goto end;

  if(!VerQueryValue(ver,"\\",&p,&len))
    goto end;
  memcpy(&info,p ,sizeof(VS_FIXEDFILEINFO));

  *major= (info.dwFileVersionMS & 0xFFFF0000) >> 16;
  *minor= (info.dwFileVersionMS & 0x0000FFFF);
  *patch= (info.dwFileVersionLS & 0xFFFF0000) >> 16;
end:
  free(ver);
}

void normalize_path(char *path, size_t size)
{
  char buf[MAX_PATH];
  if (*path== '"')
  {
    char *p;
    strcpy_s(buf, MAX_PATH, path+1);
    p= strchr(buf, '"');
    if (p) 
      *p=0;
  }
  else
    strcpy_s(buf, MAX_PATH,  path);
  GetFullPathName(buf, MAX_PATH, buf, NULL);
  strcpy_s(path, size,  buf);
}

/*
  Exclusion rules.

  Some hardware manufacturers deliver systems with own preinstalled MySQL copy
  and services. We do not want to mess up with these installations. We will
  just ignore such services, pretending it is not MySQL.

  ´@return 
    TRUE,  if this service should be excluded from UI lists etc (OEM install)
    FALSE otherwise.
*/
BOOL exclude_service(mysqld_service_properties *props)
{
  static const char* exclude_patterns[] =
  {
    "common files\\dell\\mysql\\bin\\", /* Dell's private installation */ 
    NULL
  };
  int i;
  char buf[MAX_PATH];

  /* Convert mysqld path to lower case, rules for paths are case-insensitive. */
  memcpy(buf, props->mysqld_exe, sizeof(props->mysqld_exe));
  _strlwr(buf);

  for(i= 0; exclude_patterns[i]; i++)
  {
    if (strstr(buf, exclude_patterns[i]))
      return TRUE;
  }

  return FALSE;
}


/*
  Retrieve some properties from windows mysqld service binary path.
  We're interested in ini file location and datadir, and also in version of 
  the data. We tolerate missing mysqld.exe.

  Note that this function carefully avoids using mysql libraries (e.g dbug), 
  since it is  used in unusual environments (windows installer, MFC), where we
  do not have much control over how threads are created and destroyed, so we 
  cannot assume MySQL thread initilization here.
*/
int get_mysql_service_properties(const wchar_t *bin_path, 
  mysqld_service_properties *props)
{
  int numargs;
  wchar_t mysqld_path[MAX_PATH + 4];
  wchar_t *file_part;
  wchar_t **args= NULL;
  int retval= 1;
  BOOL have_inifile;

  props->datadir[0]= 0;
  props->inifile[0]= 0;
  props->mysqld_exe[0]= 0;
  props->version_major= 0;
  props->version_minor= 0;
  props->version_patch= 0;

  args= CommandLineToArgvW(bin_path, &numargs);
  if(numargs == 2)
  {
    /*
      There are rare cases where service config does not have 
      --defaults-filein the binary parth . There services were registered with 
      plain mysqld --install, the data directory is next to "bin" in this case.
      Service name (second parameter) must be MySQL.
    */
    if(wcscmp(args[1], L"MySQL") != 0)
      goto end;
    have_inifile= FALSE;
  }
  else if(numargs == 3)
  {
    have_inifile= TRUE;
  }
  else
  {
    goto end;
  }

  if(have_inifile && wcsncmp(args[1], L"--defaults-file=", 16) != 0)
    goto end;

  GetFullPathNameW(args[0], MAX_PATH, mysqld_path, &file_part);

  if(wcsstr(mysqld_path, L".exe") == NULL)
    wcscat(mysqld_path, L".exe");

  if(wcsicmp(file_part, L"mysqld.exe") != 0 && 
    wcsicmp(file_part, L"mysqld-debug.exe") != 0 &&
    wcsicmp(file_part, L"mysqld-nt.exe") != 0)
  {
    /* The service executable is not mysqld. */
    goto end;
  }

  wcstombs(props->mysqld_exe, mysqld_path, MAX_PATH);
  /* If mysqld.exe exists, try to get its version from executable */
  if (GetFileAttributes(props->mysqld_exe) != INVALID_FILE_ATTRIBUTES)
  {
     get_file_version(props->mysqld_exe, &props->version_major, 
      &props->version_minor, &props->version_patch);
  }

  if (have_inifile)
  {
    /* We have --defaults-file in service definition. */
    wcstombs(props->inifile, args[1]+16, MAX_PATH);
    normalize_path(props->inifile, MAX_PATH);
    if (GetFileAttributes(props->inifile) != INVALID_FILE_ATTRIBUTES)
    {
      GetPrivateProfileString("mysqld", "datadir", NULL, props->datadir, MAX_PATH, 
        props->inifile);
    }
    else
    {
      /*
        Service will start even with invalid .ini file, using lookup for
        datadir relative to mysqld.exe. This is equivalent to the case no ini
        file used.
      */
      props->inifile[0]= 0;
      have_inifile= FALSE;
    }
  }

  if(!have_inifile)
  {
    /*
      Hard, although a rare case, we're guessing datadir and defaults-file.
      On Windows, defaults-file is traditionally install-root\my.ini 
      and datadir is install-root\data
    */
    char install_root[MAX_PATH];
    int i;
    char *p;

    /*
      Get the  install root(parent of bin directory where mysqld.exe)
      is located.
    */
    strcpy_s(install_root, MAX_PATH, props->mysqld_exe);
    for (i=0; i< 2; i++)
    {
      p= strrchr(install_root, '\\');
      if(!p)
        goto end;
      *p= 0;
    }

    /* Look for my.ini, my.cnf in the install root */
    sprintf_s(props->inifile, MAX_PATH, "%s\\my.ini", install_root);
    if (GetFileAttributes(props->inifile) == INVALID_FILE_ATTRIBUTES)
    {
      sprintf_s(props->inifile, MAX_PATH, "%s\\my.cnf", install_root);
    }
    if (GetFileAttributes(props->inifile) != INVALID_FILE_ATTRIBUTES)
    {
      /* Ini file found, get datadir from there */
      GetPrivateProfileString("mysqld", "datadir", NULL, props->datadir,
        MAX_PATH, props->inifile);
    }
    else
    {
      /* No ini file */
      props->inifile[0]= 0;
    }

    /* Try datadir in install directory.*/
    if (props->datadir[0] == 0)
    {
      sprintf_s(props->datadir, MAX_PATH, "%s\\data", install_root);
    }
  }

  if (props->datadir[0])
  {
    normalize_path(props->datadir, MAX_PATH);
    /* Check if datadir really exists */
    if (GetFileAttributes(props->datadir) == INVALID_FILE_ATTRIBUTES)
      goto end;
  }
  else
  {
    /* There is no datadir in ini file,  bail out.*/
    goto end;
  }

  /*
    If version could not be determined so far, try mysql_upgrade_info in 
    database directory.
  */
  if(props->version_major == 0)
  {
    char buf[MAX_PATH];
    FILE *mysql_upgrade_info;

    sprintf_s(buf, MAX_PATH, "%s\\mysql_upgrade_info", props->datadir);
    mysql_upgrade_info= fopen(buf, "r");
    if(mysql_upgrade_info)
    {
      if (fgets(buf, MAX_PATH, mysql_upgrade_info))
      {
        int major,minor,patch;
        if (sscanf(buf, "%d.%d.%d", &major, &minor, &patch) == 3)
        {
          props->version_major= major;
          props->version_minor= minor;
          props->version_patch= patch;
        }
      }
    }
  }

  if (!exclude_service(props))
    retval = 0;
end:
  LocalFree((HLOCAL)args);
  return retval;
}