shell.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2001 Free Software Foundation, Inc.
GNU Mailutils 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.
GNU Mailutils 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 GNU Mailutils; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "mail.h"
int
mail_execute (int shell, int argc, char **argv)
{
pid_t pid = fork ();
if (pid == 0)
{
if (shell)
{
if (argc == 0)
{
argv = xmalloc (sizeof (argv[0]) * 2);
argv[0] = getenv ("SHELL");
argv[1] = NULL;
argc = 1;
}
else
{
char *buf = NULL;
while (isspace (**argv))
(*argv)++;
argcv_string (argc, &argv[0], &buf);
/* 1(shell) + 1 (-c) + 1(arg) + 1 (null) = 4 */
argv = xmalloc (4 * (sizeof (argv[0])));
argv[0] = getenv ("SHELL");
argv[1] = "-c";
argv[2] = buf;
argv[3] = NULL;
argc = 3;
}
}
execvp (argv[0], argv);
exit (1);
}
else if (pid > 0)
{
while (waitpid (pid, NULL, 0) == -1)
/* do nothing */;
return 0;
}
else if (pid < 0)
{
mu_error ("fork failed: %s", mu_strerror (errno));
return 1;
}
}
/*
* sh[ell] [command] -- GNU extension
* ![command] -- GNU extension
*/
int
mail_shell (int argc, char **argv)
{
if (argv[0][0] == '!' && strlen (argv[0]) > 1)
{
argv[0][0] = ' ';
return mail_execute (1, argc, argv);
}
else if (argc > 1)
{
return mail_execute (0, argc-1, argv+1);
}
else
{
return mail_execute (1, 0, NULL);
}
return 1;
}