split long lines, use get_mysql_service_properties()

sql/winservice.c

+/*
+  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>
+
+
+/*
+  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);
+}
+
+/*
+  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;
+
+  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 != 3)
+    goto end;
+
+  if(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.exe") != 0 &&
+    wcsicmp(file_part, L"mysqld-nt.exe") != 0)
+  {
+    /* The service executable is not mysqld. */
+    goto end;
+  }
+
+  wcstombs(props->mysqld_exe, args[0], MAX_PATH);
+  wcstombs(props->inifile, args[1]+16, MAX_PATH);
+  normalize_path(props->inifile, MAX_PATH);
+
+  if (GetFileAttributes(props->inifile) == INVALID_FILE_ATTRIBUTES)
+    goto end;
+
+  /* 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);
+  }
+
+  GetPrivateProfileString("mysqld", "datadir", NULL, props->datadir, MAX_PATH, 
+    props->inifile);
+
+  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;
+        }
+      }
+    }
+  }
+  retval = 0;
+end:
+  LocalFree((HLOCAL)args);
+  return retval;
+}
\ No newline at end of file

sql/winservice.h

+/*
+  Extract properties of a windows service binary path
+*/
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <windows.h> 
+typedef struct mysqld_service_properties_st
+{
+  char mysqld_exe[MAX_PATH];
+  char inifile[MAX_PATH];
+  char datadir[MAX_PATH];
+  int  version_major;
+  int  version_minor;
+  int  version_patch;
+} mysqld_service_properties;
+
+extern int get_mysql_service_properties(const wchar_t *bin_path, 
+  mysqld_service_properties *props);
+
+#ifdef __cplusplus
+}
+#endif