1 files changed, 54 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libugly/openpty.c b/mdk-stage1/dietlibc/libugly/openpty.c
new file mode 100644
index 000000000..8d06f329c
--- /dev/null
+++ b/mdk-stage1/dietlibc/libugly/openpty.c
@@ -0,0 +1,54 @@
+#include <unistd.h>
+#include <pty.h>
+#include <fcntl.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <string.h>
+
+extern int __ltostr(char *s, int size, unsigned long i, int base, char UpCase);
+
+int openpty(int *amaster, int *aslave, char *name, struct termios
+	    *termp, struct winsize *winp) {
+  int fd;
+  char buf[20];
+#if 0
+  This is what glibc does:
+  open("/dev/ptmx", O_RDWR)               = 4
+  statfs("/dev/pts", {f_type=0x1cd1, f_bsize=1024, f_blocks=0, f_bfree=0, f_files=0, f_ffree=0, f_namelen=255}) = 0
+  ioctl(4, TCGETS, {B38400 opost isig icanon echo ...}) = 0
+  ioctl(4, 0x80045430, [0])               = 0
+  stat("/dev/pts/0", {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0
+  statfs("/dev/pts/0", {f_type=0x1cd1, f_bsize=1024, f_blocks=0, f_bfree=0, f_files=0, f_ffree=0, f_namelen=255}) = 0
+  ioctl(4, 0x40045431, [0])               = 0
+  ioctl(4, TCGETS, {B38400 opost isig icanon echo ...}) = 0
+  ioctl(4, 0x80045430, [0])               = 0
+  stat("/dev/pts/0", {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0
+  open("/dev/pts/0", O_RDWR|O_NOCTTY)     = 5
+#endif
+  if ((fd=open("/dev/ptmx",O_RDWR))<0) return -1;
+#if 0
+  if (ioctl(fd,TCGETS,&ts)<0) goto kaputt;
+#endif
+  {
+    int unlock=0;
+    while (ioctl(fd,TIOCSPTLCK, &unlock)<0) if (errno!=EINTR) goto kaputt;
+  }
+  {
+    int ptyno;
+    while (ioctl(fd,TIOCGPTN,&ptyno)<0) if (errno!=EINTR) goto kaputt;
+    strcpy(buf,"/dev/pts/");
+    __ltostr(buf+9,10,ptyno,10,0);
+  }
+  *aslave=open(buf,O_RDWR|O_NOCTTY);
+  if (*aslave<0) goto kaputt;
+  *amaster=fd;
+  if (name) strcpy(name,buf);
+  if (termp)
+    while (tcsetattr(*aslave,TCSAFLUSH,termp) && errno==EINTR);
+  if (winp) while (ioctl(*aslave, TIOCSWINSZ, winp) && errno==EINTR);
+  return 0;
+kaputt:
+  close(fd);
+  return -1;
+}