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/*
* Copyright (C) 1996-2000 Michael R. Elkins.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include "mutt.h"
#include <unistd.h>
#include <stdlib.h>
#include <sys/wait.h>
/* Invokes a command on a pipe and optionally connects its stdin and stdout
* to the specified handles.
*/
pid_t
mutt_create_filter_fd (const char *cmd, FILE **in, FILE **out, FILE **err,
int fdin, int fdout, int fderr)
{
int pin[2], pout[2], perr[2], thepid;
if (in)
{
*in = 0;
if (pipe (pin) == -1)
return (-1);
}
if (out)
{
*out = 0;
if (pipe (pout) == -1)
{
if (in)
{
close (pin[0]);
close (pin[1]);
}
return (-1);
}
}
if (err)
{
*err = 0;
if (pipe (perr) == -1)
{
if (in)
{
close (pin[0]);
close (pin[1]);
}
if (out)
{
close (pout[0]);
close (pout[1]);
}
return (-1);
}
}
mutt_block_signals_system ();
if ((thepid = fork ()) == 0)
{
mutt_unblock_signals_system (0);
if (in)
{
close (pin[1]);
dup2 (pin[0], 0);
close (pin[0]);
}
else if (fdin != -1)
{
dup2 (fdin, 0);
close (fdin);
}
if (out)
{
close (pout[0]);
dup2 (pout[1], 1);
close (pout[1]);
}
else if (fdout != -1)
{
dup2 (fdout, 1);
close (fdout);
}
if (err)
{
close (perr[0]);
dup2 (perr[1], 2);
close (perr[1]);
}
else if (fderr != -1)
{
dup2 (fderr, 2);
close (fderr);
}
execl (EXECSHELL, "sh", "-c", cmd, NULL);
_exit (127);
}
else if (thepid == -1)
{
mutt_unblock_signals_system (1);
if (in)
{
close (pin[0]);
close (pin[1]);
}
if (out)
{
close (pout[0]);
close (pout[1]);
}
if (err)
{
close (perr[0]);
close (perr[1]);
}
return (-1);
}
if (out)
{
close (pout[1]);
*out = fdopen (pout[0], "r");
}
if (in)
{
close (pin[0]);
*in = fdopen (pin[1], "w");
}
if (err)
{
close (perr[1]);
*err = fdopen (perr[0], "r");
}
return (thepid);
}
pid_t mutt_create_filter (const char *s, FILE **in, FILE **out, FILE **err)
{
return (mutt_create_filter_fd (s, in, out, err, -1, -1, -1));
}
int mutt_wait_filter (pid_t pid)
{
int rc;
waitpid (pid, &rc, 0);
mutt_unblock_signals_system (1);
rc = WIFEXITED (rc) ? WEXITSTATUS (rc) : -1;
return rc;
}
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