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#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>
extern char *malloc();
extern char *rindex();
extern char *sprintf();
static char *basename();
static char SHELL[] = "/bin/sh";
/*
* returns pid, or -1 for failure
*/
_openchild(command, fto, ffrom)
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]
*/
(void) close(0);
(void) dup(pdto[0]);
(void) close(1);
(void) dup(pdfrom[1]);
for (i = _rpc_dtablesize() - 1; i >= 3; i--) {
(void) close(i);
}
com = malloc((unsigned) strlen(command) + 6);
if (com == NULL) {
_exit(~0);
}
(void) 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");
(void) close(pdto[0]);
*ffrom = fdopen(pdfrom[0], "r");
(void) close(pdfrom[1]);
break;
}
return (pid);
/*
* error cleanup and return
*/
error3:
(void) close(pdfrom[0]);
(void) close(pdfrom[1]);
error2:
(void) close(pdto[0]);
(void) close(pdto[1]);
error1:
return (-1);
}
static char *
basename(path)
char *path;
{
char *p;
p = rindex(path, '/');
if (p == NULL) {
return (path);
} else {
return (p + 1);
}
}
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