1 files changed, 112 insertions, 0 deletions
diff --git a/sunrpc/openchild.c b/sunrpc/openchild.c
new file mode 100644
index 0000000..2fa26fa
--- /dev/null
+++ b/sunrpc/openchild.c
@@ -0,0 +1,112 @@
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)openchild.c	2.3 88/08/15 4.0 RPCSRC; from 1.7 88/02/08 SMI";
+#endif
+/*
+ * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
+ * unrestricted use provided that this legend is included on all tape
+ * media and as a part of the software program in whole or part.  Users
+ * may copy or modify Sun RPC without charge, but are not authorized
+ * to license or distribute it to anyone else except as part of a product or
+ * program developed by the user.
+ *
+ * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
+ * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
+ *
+ * Sun RPC is provided with no support and without any obligation on the
+ * part of Sun Microsystems, Inc. to assist in its use, correction,
+ * modification or enhancement.
+ *
+ * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
+ * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
+ * OR ANY PART THEREOF.
+ *
+ * In no event will Sun Microsystems, Inc. be liable for any lost revenue
+ * or profits or other special, indirect and consequential damages, even if
+ * Sun has been advised of the possibility of such damages.
+ *
+ * Sun Microsystems, Inc.
+ * 2550 Garcia Avenue
+ * Mountain View, California  94043
+ */
+
+/*
+ * Copyright (c) 1988 by Sun Microsystems, Inc.
+ */
+
+/*
+ * Open two pipes to a child process, one for reading, one for writing.
+ * The pipes are accessed by FILE pointers. This is NOT a public
+ * interface, but for internal use only!
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <rpc/rpc.h>
+#include <rpc/clnt.h>
+
+static char SHELL[] = "/bin/sh";
+
+/*
+ * returns pid, or -1 for failure
+ */
+int
+_openchild (char *command, FILE ** fto, FILE ** ffrom)
+{
+  int i;
+  int pid;
+  int pdto[2];
+  int pdfrom[2];
+  char *com;
+
+  if (pipe (pdto) < 0)
+    goto error1;
+  if (pipe (pdfrom) < 0)
+    goto error2;
+  switch (pid = vfork ())
+    {
+    case -1:
+      goto error3;
+
+    case 0:
+      /*
+       * child: read from pdto[0], write into pdfrom[1]
+       */
+      close (0);
+      dup (pdto[0]);
+      close (1);
+      dup (pdfrom[1]);
+      for (i = _rpc_dtablesize () - 1; i >= 3; i--)
+	close (i);
+      com = malloc (strlen (command) + 6);
+      if (com == NULL)
+	_exit (~0);
+      sprintf (com, "exec %s", command);
+      execl (SHELL, basename (SHELL), "-c", com, NULL);
+      _exit (~0);
+
+    default:
+      /*
+       * parent: write into pdto[1], read from pdfrom[0]
+       */
+      *fto = fdopen (pdto[1], "w");
+      close (pdto[0]);
+      *ffrom = fdopen (pdfrom[0], "r");
+      close (pdfrom[1]);
+      break;
+    }
+  return pid;
+
+  /*
+   * error cleanup and return
+   */
+error3:
+  close (pdfrom[0]);
+  close (pdfrom[1]);
+error2:
+  close (pdto[0]);
+  close (pdto[1]);
+error1:
+  return -1;
+}