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git.ipfire.org Git - thirdparty/util-linux.git/blob - lib/exec_shell.c
2 * exec_shell() - launch a shell, else exit!
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2, or (at your option) any
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 #include <sys/types.h>
29 #include "exec_shell.h"
31 #define DEFAULT_SHELL "/bin/sh"
33 void __attribute__((__noreturn__
)) exec_shell(void)
35 const char *shell
= getenv("SHELL");
37 const char *shell_basename
;
41 shell
= DEFAULT_SHELL
;
43 shellc
= xstrdup(shell
);
44 shell_basename
= basename(shellc
);
45 arg0
= xmalloc(strlen(shell_basename
) + 2);
47 strcpy(arg0
+ 1, shell_basename
);
49 execl(shell
, arg0
, (char *)NULL
);