Add libutil as disabled package

disabled-packages/libutil/build.sh

@@ -0,0 +1,11 @@
+TERMUX_PKG_HOMEPAGE=https://refspecs.linuxbase.org/LSB_2.1.0/LSB-generic/LSB-generic/libutil.html
+TERMUX_PKG_DESCRIPTION="Library with terminal functions"
+TERMUX_PKG_VERSION=0.1
+TERMUX_PKG_BUILD_IN_SRC=yes
+
+termux_step_make_install () {
+	CFLAGS+=" -std=c11"
+	$CC $CFLAGS -c -fPIC $TERMUX_PKG_BUILDER_DIR/pty.c -o pty.o
+	$CC -shared -fPIC $LDFLAGS -o $TERMUX_PREFIX/lib/libutil.so pty.o
+	cp $TERMUX_PKG_BUILDER_DIR/pty.h $TERMUX_PREFIX/include/
+}

disabled-packages/libutil/pty.c

@@ -0,0 +1,68 @@
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/param.h>
+#include <sys/types.h>
+#include <stdlib.h>
+#include <termios.h>
+#include <unistd.h>
+
+
+int openpty(int* amaster, int* aslave, char* name, struct termios* termp, struct winsize* winp)
+{
+	char buf[512];
+
+	int master = open("/dev/ptmx", O_RDWR);
+	if (master == -1) return -1;
+	if (grantpt(master) || unlockpt(master) || ptsname_r(master, buf, sizeof buf)) goto fail;
+
+	int slave = open(buf, O_RDWR | O_NOCTTY);
+	if (slave == -1) goto fail;
+
+	/* XXX Should we ignore errors here?  */
+	if (termp) tcsetattr(slave, TCSAFLUSH, termp);
+	if (winp) ioctl(slave, TIOCSWINSZ, winp);
+
+	*amaster = master;
+	*aslave = slave;
+	if (name != NULL) strcpy(name, buf);
+	return 0;
+
+fail:
+	close(master);
+	return -1;
+}
+
+
+int login_tty(int fd)
+{
+	setsid();
+	if (ioctl(fd, TIOCSCTTY, NULL) == -1) return -1;
+	dup2(fd, 0);
+	dup2(fd, 1);
+	dup2(fd, 2);
+	if (fd > 2) close(fd);
+	return 0;
+}
+
+
+int forkpty(int* amaster, char* name, struct termios* termp, struct winsize* winp)
+{
+	int master, slave;
+	if (openpty(&master, &slave, name, termp, winp) == -1) {
+		return -1;
+	}
+
+	int pid;
+	switch (pid = fork()) {
+		case -1:
+			return -1;
+		case 0:
+			close(master);
+			if (login_tty(slave)) _exit(1);
+			return 0;
+		default:
+			*amaster = master;
+			close (slave);
+			return pid;
+	}
+}

disabled-packages/libutil/pty.h

@@ -0,0 +1,12 @@
+#ifndef _PTY_H
+#define _PTY_H
+
+#include <termios.h>
+
+int openpty(int* amaster, int* aslave, char* name, struct termios* termp, struct winsize* winp);
+
+int login_tty(int fd);
+
+int forkpty(int* amaster, char* name, struct termios* termp, struct winsize* winp);
+
+#endif