shell.c
1.9 KB
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/* GNU mailutils - a suite of utilities for electronic mail
Copyright (C) 1999, 2001 Free Software Foundation, Inc.
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, 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. */
#include "mail.h"
/*
* sh[ell] [command] -- GNU extension
* ![command] -- GNU extension
*/
int
mail_shell (int argc, char **argv)
{
if (argv[0][0] == '!' && strlen (argv[0]) > 1)
{
char *buf = NULL;
argv[0][0] = ' ';
argcv_string (argc, argv, &buf);
if (buf)
{
int ret = util_do_command ("shell %s", &buf[1]);
free (buf);
return ret;
}
else
return util_do_command ("shell");
}
else if (argc > 1)
{
int pid = fork ();
if (pid == 0)
{
char **argvec;
char *buf = NULL;
/* 1(shell) + 1 (-c) + 1(arg) + 1 (null) = 4 */
argvec = xmalloc (4 * (sizeof (char *)));
argcv_string (argc-1, &argv[1], &buf);
argvec[0] = getenv("SHELL");
argvec[1] = (char *)"-c";
argvec[2] = buf;
argvec[3] = NULL;
execvp (argvec[0], argvec);
free (buf); /* Being cute, nuke it when finish testing. */
free (argvec);
return 1;
}
if (pid > 0)
{
while (waitpid(pid, NULL, 0) == -1)
/* do nothing */;
return 0;
}
return 1;
}
else
{
return util_do_command ("shell %s", getenv("SHELL"));
}
return 1;
}