/* * 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> #ifdef USE_IN_LIBIO # include <libio/iolibio.h> # define fflush(s) _IO_fflush (s) # define __fdopen(fd,m) _IO_fdopen (fd,m) #endif /* * returns pid, or -1 for failure */ int _openchild (const char *command, FILE ** fto, FILE ** ffrom) { int i; int pid; int pdto[2]; int pdfrom[2]; if (__pipe (pdto) < 0) goto error1; if (__pipe (pdfrom) < 0) goto error2; switch (pid = __fork ()) { 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]); fflush (stderr); for (i = _rpc_dtablesize () - 1; i >= 3; i--) __close (i); fflush (stderr); execlp (command, command, 0); perror ("exec"); _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; }