Add library with function to spawn a process connected to a pseudo-terminal

CMakeLists.txt

@@ -571,6 +571,10 @@ add_subdirectory(ffiTestLibrary ${CMAKE_CURRENT_BINARY_DIR}/build/ffiTestLibrary
 # Handling Third party dependencies
 add_third_party_dependencies_per_platform()
 
+if (UNIX)
+    addIndependentLibraryWithRPATH(tty ${CMAKE_CURRENT_SOURCE_DIR}/tty/tty.c)
+endif()
+
 # Packaging Setup
 include(cmake/packaging.cmake)
 

tty/tty.c

@@ -0,0 +1,30 @@
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <sys/ioctl.h>
+
+#define CHECK_ERROR(exp) if ((exp) == -1) { printf("Error in %s at %s: %s\n", __func__, #exp, strerror(errno)); exit(1); }
+
+pid_t tty_spawn(int fdm, const char *path, char *const argv[], char *const envp[])
+{
+    pid_t pid = fork();
+    if (pid == 0)
+    {
+        int fds = open(ptsname(fdm), O_RDWR);
+        close(fdm);
+        close(0);
+        close(1);
+        close(2);
+        dup(fds);
+        dup(fds);
+        dup(fds);
+        close(fds);
+        CHECK_ERROR(setsid());
+        CHECK_ERROR(ioctl(0, TIOCSCTTY, 0));
+        CHECK_ERROR(execve(path, argv, envp));
+    }
+    return pid;
+}