explorer/systeminfo.c

   1 #include "../common/git-compat-util.h"
   2 #include <windows.h>
   3 #include "../common/systeminfo.h"
   4 #include "dll.h"
   5
   6 static char gitPath[MAX_PATH] = "";
   7 static TCHAR msysPath[MAX_PATH];
   8
   9 static int get_msys_path_from_registry(HKEY root)
  10 {
  11         HKEY key;
  12         DWORD path_len = sizeof(msysPath);
  13
  14         LONG result = RegOpenKeyEx(root, GIT_CHEETAH_REG_PATH,
  15                 0, KEY_QUERY_VALUE, &key);
  16         if (ERROR_SUCCESS != result)
  17                 return 0;
  18
  19         result = RegQueryValueEx(key,
  20                 GIT_CHEETAH_REG_PATHTOMSYS,
  21                 NULL, NULL, (LPBYTE)msysPath, &path_len);
  22
  23         RegCloseKey(key);
  24
  25         return ERROR_SUCCESS == result;
  26 }
  27
  28 static TCHAR *msys_path(void)
  29 {
  30         static int found_path = 0;
  31
  32         /* try to find user-specific settings first */
  33         if (!found_path)
  34                 found_path = get_msys_path_from_registry(HKEY_CURRENT_USER);
  35
  36         /* if not found in user settings, try machine-wide */
  37         if (!found_path)
  38                 found_path = get_msys_path_from_registry(HKEY_LOCAL_MACHINE);
  39
  40         if (found_path)
  41                 return msysPath;
  42
  43         return NULL;
  44 }
  45
  46 static inline int test_msys_path(const char *postfix, char *path)
  47 {
  48         int n;
  49         char stat_path[MAX_PATH];
  50         struct stat stat_info;
  51
  52         n = snprintf(stat_path, MAX_PATH, "%s\\%s\\git",
  53                         msys_path(), postfix);
  54         if (n >= MAX_PATH)
  55                 goto test_git_path_failed;
  56
  57         n = snprintf(path, MAX_PATH, "%s\\%s", msys_path(), postfix);
  58         if (n >= MAX_PATH)
  59                 goto test_git_path_failed;
  60
  61         if (lstat(path, &stat_info) == 0) {
  62                 return 1;
  63         }
  64
  65 test_git_path_failed:
  66         *path = '\0';
  67         return 0;
  68 }
  69
  70 const char *git_path()
  71 {
  72         char path[MAX_PATH];
  73
  74         if (!msys_path())
  75                 return NULL;
  76
  77         if (*gitPath)
  78                 return gitPath;
  79
  80         if (test_msys_path("bin", path)) {
  81                 memcpy(gitPath, path, MAX_PATH);
  82                 return gitPath;
  83         }
  84
  85         if (test_msys_path("mingw\\bin", path)) {
  86                 memcpy(gitPath, path, MAX_PATH);
  87                 return gitPath;
  88         }
  89
  90         return NULL;
  91 }
  92
  93 void message_box(const char *string)
  94 {
  95         MessageBox(0, string, "Hello", MB_OK|MB_ICONEXCLAMATION);
  96 }
  97