Windows' system() library function can malfunction with "Access Denied" when crossing 32/64 barrier, so define our own

1 files changed, 42 insertions, 0 deletions

diff --git a/utils/awk/missing95.c b/utils/awk/missing95.c
index 64138ade..4daa8d2e 100644
--- a/utils/awk/missing95.c
+++ b/utils/awk/missing95.c
@@ -10,3 +10,45 @@ FILE *popen(char *s, char *m) {
 int pclose(FILE *f) {
 	return _pclose(f);	/* return NULL; */
 }
+
+#include <windows.h>
+#include <winbase.h>
+#include <winsock.h>
+
+/* system doesn't work properly in some 32/64 (WoW64) combinations */
+int system(char *s) {
+	int status, n;
+	PROCESS_INFORMATION pinfo;
+	STARTUPINFO si;
+	char *cmd;
+	char app[256];
+	static char cmdexe[] = "\\cmd.exe";
+
+	memset(&si, 0, sizeof(si));
+	si.cb = sizeof(si);
+//	si.dwFlags = STARTF_USESHOWWINDOW;
+//	si.wShowWindow = SW_SHOW;
+
+	n = GetSystemDirectory(app, sizeof(app)-sizeof(cmdexe));
+	if(n > sizeof(app))
+		return -1;
+	strcat_s(app, sizeof(app), cmdexe);
+	n = strlen(s)+20;
+	cmd = malloc(n);
+	if(cmd == NULL)
+		return -1;
+	strcpy_s(cmd, n, "cmd.exe /c");
+	strcat_s(cmd, n, s);
+	if(!CreateProcess(app, cmd, NULL, NULL, TRUE, CREATE_DEFAULT_ERROR_MODE, NULL/* env*/, NULL /*wdir*/, &si, &pinfo)){
+		fprintf(stderr, "can't create process %s %d\n", s, GetLastError());
+		free(cmd);
+		return -1;
+	}
+	free(cmd);
+	if(WaitForSingleObject(pinfo.hProcess, INFINITE) == WAIT_FAILED)
+		return -1;
+	if(!GetExitCodeProcess(pinfo.hProcess, &status))
+		status = 1;
+	//fprintf(stderr, "status %d\n", status);
+	return status;
+}