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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- The author of the program may be contacted at ian@airs.com or
- c/o Cygnus Support, 48 Grove Street, Somerville, MA 02144.
- */
-
- #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;
- }
-