106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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/*
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* Copyright (c) 1988 by Sun Microsystems, Inc.
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*/
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/*
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* Open two pipes to a child process, one for reading, one for writing.
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* The pipes are accessed by FILE pointers. This is NOT a public
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* interface, but for internal use only!
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <rpc/rpc.h>
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#include <rpc/clnt.h>
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/*
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* returns pid, or -1 for failure
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*/
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int
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_openchild (char *command, FILE ** fto, FILE ** ffrom)
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{
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int i;
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int pid;
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int pdto[2];
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int pdfrom[2];
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if (pipe (pdto) < 0)
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goto error1;
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if (pipe (pdfrom) < 0)
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goto error2;
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switch (pid = fork ())
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{
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case -1:
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goto error3;
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case 0:
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/*
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* child: read from pdto[0], write into pdfrom[1]
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*/
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close (0);
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dup (pdto[0]);
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close (1);
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dup (pdfrom[1]);
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fflush (stderr);
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for (i = _rpc_dtablesize () - 1; i >= 3; i--)
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close (i);
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fflush (stderr);
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execlp (command, command, 0);
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perror ("exec");
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_exit (~0);
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default:
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/*
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* parent: write into pdto[1], read from pdfrom[0]
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*/
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*fto = fdopen (pdto[1], "w");
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close (pdto[0]);
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*ffrom = fdopen (pdfrom[0], "r");
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close (pdfrom[1]);
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break;
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}
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return pid;
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/*
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* error cleanup and return
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*/
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error3:
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close (pdfrom[0]);
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close (pdfrom[1]);
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error2:
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close (pdto[0]);
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close (pdto[1]);
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error1:
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return -1;
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}
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