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/* epopen.c
A version of popen that goes through ixsspawn.
Copyright (C) 1992 Ian Lance Taylor
This file is part of the Taylor UUCP package.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
The author of the program may be contacted at ian@airs.com or
c/o Cygnus Support, Building 200, 1 Kendall Square, Cambridge, MA 02139.
*/
#include "uucp.h"
#include "sysdep.h"
#include <errno.h>
/* A version of popen that goes through ixsspawn. This actually takes
an array of arguments rather than a string, and takes a boolean
read/write value rather than a string. It sets *pipid to the
process ID of the child. */
FILE *
espopen (pazargs, frd, pipid)
const char **pazargs;
boolean frd;
pid_t *pipid;
{
int aidescs[3];
pid_t ipid;
FILE *eret;
if (frd)
{
aidescs[0] = SPAWN_NULL;
aidescs[1] = SPAWN_READ_PIPE;
}
else
{
aidescs[0] = SPAWN_WRITE_PIPE;
aidescs[1] = SPAWN_NULL;
}
aidescs[2] = SPAWN_NULL;
ipid = ixsspawn (pazargs, aidescs, TRUE, FALSE,
(const char *) NULL, FALSE, TRUE,
(const char *) NULL, (const char *) NULL,
(const char *) NULL);
if (ipid < 0)
return NULL;
if (frd)
eret = fdopen (aidescs[1], (char *) "r");
else
eret = fdopen (aidescs[0], (char *) "w");
if (eret == NULL)
{
int ierr;
ierr = errno;
(void) close (frd ? aidescs[1] : aidescs[0]);
(void) kill (ipid, SIGKILL);
(void) ixswait ((unsigned long) ipid, (const char *) NULL);
errno = ierr;
return NULL;
}
*pipid = ipid;
return eret;
}
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