userspace: Rewrite everything

Everything.

Signed-off-by: EnderIce2 <enderice2@protonmail.com>

Userspace/apps/test/cross_test/linux_glibc.c

@@ -0,0 +1,97 @@
+#define _POSIX_SOURCE
+#define _DEFAULT_SOURCE
+#include <stdint.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <limits.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/mman.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <pty.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+
+#ifndef __GLIBC__
+#define __GLIBC__ 0
+#endif
+
+#ifndef __GLIBC_MINOR__
+#define __GLIBC_MINOR__ 0
+#endif
+
+int ptmx_test()
+{
+	int masterFD;
+	int slaveFD;
+	char slaveName[100];
+
+	masterFD = open("/dev/ptmx", O_RDWR | O_NOCTTY);
+	if (masterFD < 0)
+	{
+		perror("Failed to open /dev/ptmx");
+		return 1;
+	}
+
+	if (grantpt(masterFD) < 0)
+	{
+		perror("Failed to grantpt");
+		return 1;
+	}
+
+	if (unlockpt(masterFD) < 0)
+	{
+		perror("Failed to unlockpt");
+		return 1;
+	}
+
+	if (ptsname_r(masterFD, slaveName, sizeof(slaveName)) != 0)
+	{
+		perror("Failed to get slave name");
+		return 1;
+	}
+
+	printf("Slave terminal: %s\n", slaveName);
+
+	slaveFD = open(slaveName, O_RDWR | O_NOCTTY);
+	if (slaveFD < 0)
+	{
+		perror("Failed to open slave terminal");
+		return 1;
+	}
+
+	struct termios t;
+	tcgetattr(slaveFD, &t);
+	cfmakeraw(&t);
+	tcsetattr(slaveFD, TCSANOW, &t);
+
+	char *message = "Hello from master!\n";
+	write(masterFD, message, strlen(message));
+
+	char buffer[100];
+	int len = read(slaveFD, buffer, sizeof(buffer) - 1);
+	if (len > 0)
+	{
+		buffer[len] = '\0';
+		printf("Received from slave: %s\n", buffer);
+	}
+
+	close(masterFD);
+	close(slaveFD);
+	return 0;
+}
+
+int main(int argc, char *argv[], char *envp[])
+{
+	printf("glibc %d.%d: Hello, World!\n", __GLIBC__, __GLIBC_MINOR__);
+	fflush(stdout);
+	ptmx_test();
+	return 0;
+}