Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
Browse files

Implement process.title for cygwin

  • Loading branch information...
commit d8642a8aa65dc7e69ecdab42743a545378621ca8 1 parent cf909e8
@piscisaureus piscisaureus authored ry committed
Showing with 133 additions and 3 deletions.
  1. +133 −3 src/platform_cygwin.cc
View
136 src/platform_cygwin.cc
@@ -3,11 +3,31 @@
#include <sys/param.h> // for MAXPATHLEN
#include <unistd.h> // getpagesize
+#include <windows.h>
namespace node {
static char buf[MAXPATHLEN + 1];
+static char *process_title = NULL;
+
+
+// Does the about the same as perror(), but for windows api functions
+static void _winapi_perror(const char* prefix = NULL) {
+ DWORD errno = GetLastError();
+ char *errmsg;
+
+ FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+ NULL, errno, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&errmsg, 0, NULL);
+
+ // FormatMessage messages include a newline character
+
+ if (prefix) {
+ fprintf(stderr, "%s: %s", prefix, errmsg);
+ } else {
+ fputs(errmsg, stderr);
+ }
+}
char** OS::SetupArgs(int argc, char *argv[]) {
@@ -16,13 +36,123 @@ char** OS::SetupArgs(int argc, char *argv[]) {
void OS::SetProcessTitle(char *title) {
- ;
+ // We need to convert _title_ to UTF-16 first, because that's what windows uses internally.
+ // It would be more efficient to use the UTF-16 value that we can obtain from v8,
+ // but it's not accessible from here.
+
+ // Max title length; according to the specs it should be 64K but in practice it's a little over 30000,
+ // but who needs titles that long anyway?
+ const int MAX_TITLE_LENGTH = 30001;
+
+ int length;
+ WCHAR *title_w;
+
+ // Find out how big the buffer for the wide-char title must be
+ length = MultiByteToWideChar(CP_UTF8, 0, title, -1, NULL, 0);
+ if (!length) {
+ _winapi_perror("MultiByteToWideChar");
+ return;
+ }
+
+ // Convert to wide-char string
+ title_w = new WCHAR[length];
+ length = MultiByteToWideChar(CP_UTF8, 0, title, -1, title_w, length);
+ if (!length) {
+ _winapi_perror("MultiByteToWideChar");
+ delete title_w;
+ return;
+ };
+
+ // If the title must be truncated insert a \0 terminator there
+ if (length > MAX_TITLE_LENGTH) {
+ title_w[MAX_TITLE_LENGTH - 1] = *L"\0";
+ }
+
+ if (!SetConsoleTitleW(title_w)) {
+ _winapi_perror("SetConsoleTitleW");
+ }
+
+ free(process_title);
+ process_title = strdup(title);
+
+ delete title_w;
+}
+
+
+static inline char* _getProcessTitle() {
+ WCHAR *title_w;
+ char *title;
+ int length, length_w;
+
+ length_w = GetConsoleTitleW(L"\0", sizeof(WCHAR));
+
+ // If length is zero, there may be an error or the title may be empty
+ if (!length_w) {
+ if (GetLastError()) {
+ _winapi_perror("GetConsoleTitleW");
+ return NULL;
+ }
+ else {
+ // The title is empty, so return empty string
+ process_title = strdup("\0");
+ return process_title;
+ }
+ }
+
+ // Room for \0 terminator
+ length_w++;
+
+ title_w = new WCHAR[length_w];
+
+ if (!GetConsoleTitleW(title_w, length_w * sizeof(WCHAR))) {
+ _winapi_perror("GetConsoleTitleW");
+ delete title_w;
+ return NULL;
+ }
+
+ // Find out what the size of the buffer is that we need
+ length = WideCharToMultiByte(CP_UTF8, 0, title_w, length_w, NULL, 0, NULL, NULL);
+ if (!length) {
+ _winapi_perror("WideCharToMultiByte");
+ delete title_w;
+ return NULL;
+ }
+
+ title = (char *) malloc(length);
+ if (!title) {
+ perror("malloc");
+ delete title_w;
+ return NULL;
+ }
+
+ // Do utf16 -> utf8 conversion here
+ if (!WideCharToMultiByte(CP_UTF8, 0, title_w, -1, title, length, NULL, NULL)) {
+ _winapi_perror("WideCharToMultiByte");
+ delete title_w;
+ free(title);
+ return NULL;
+ }
+
+ delete title_w;
+
+ return title;
}
const char* OS::GetProcessTitle(int *len) {
- *len = 0;
- return NULL;
+ // If the process_title was never read before nor explicitly set,
+ // we must query it with getConsoleTitleW
+ if (!process_title) {
+ process_title = _getProcessTitle();
+ }
+
+ if (process_title) {
+ *len = strlen(process_title);
+ return process_title;
+ } else {
+ *len = 0;
+ return NULL;
+ }
}
Please sign in to comment.
Something went wrong with that request. Please try again.