shell.c
3.02 KB
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2001, 2005, 2007, 2009, 2010 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 3, 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, see <http://www.gnu.org/licenses/>. */
#include "mail.h"
static void
expand_bang (char **pbuf)
{
char *last = NULL;
char *tmp, *p, *q;
size_t count = 0;
mailvar_get (&last, "gnu-last-command", mailvar_type_string, 0);
for (p = *pbuf; *p; p++)
if (*p == '!')
count++;
if (count == 0)
return;
if (!last)
{
util_error (_("No previous command"));
return;
}
tmp = xmalloc (strlen (*pbuf) + count * (strlen (last) - 1) + 1);
for (p = *pbuf, q = tmp; *p; )
{
if (*p == '!')
{
strcpy (q, last);
q += strlen (q);
p++;
}
else
*p++ = *q++;
}
*q = 0;
free (*pbuf);
*pbuf = tmp;
}
int
mail_execute (int shell, int argc, char **argv)
{
int xargc, i, status, rc;
char **xargv;
char *buf;
if (argc == 0)
{
/* No arguments mean execute a copy of the user shell */
shell = 1;
}
xargc = argc;
if (shell && argc < 3)
xargc = 3;
xargv = xcalloc (xargc + 1, sizeof (xargv[0]));
for (i = 0; i < argc; i++)
xargv[i] = argv[i];
/* Expand arguments if required */
if (mailvar_get (NULL, "bang", mailvar_type_boolean, 0) == 0)
{
int i;
for (i = 0; i < xargc; i++)
expand_bang (xargv + i);
}
/* Reconstruct the command line and save it to gnu-last-command variable.
Important: use argc (not xargc)!
*/
mu_argcv_string (argc, xargv, &buf);
mailvar_set ("gnu-last-command", buf, mailvar_type_string,
MOPTF_QUIET | MOPTF_OVERWRITE);
if (shell)
{
xargv[0] = getenv ("SHELL");
if (argc == 0)
xargv[1] = NULL;
else
{
xargv[1] = "-c";
xargv[2] = buf;
xargv[3] = NULL;
}
}
rc = mu_spawnvp (xargv[0], xargv, &status);
if (rc)
{
mu_diag_funcall (MU_DIAG_ERROR, "mu_spawnvp", xargv[0], rc);
}
/* FIXME:
else if (status)
mu_diag_output (MU_DIAG_NOTICE, ....
*/
free (buf);
free (xargv);
return rc;
}
/*
* 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;
}