bigbiff | 7b4c7a6 | 2015-01-01 19:44:14 -0500 | [diff] [blame] | 1 | /* |
| 2 | * exec_shell() - launch a shell, else exit! |
| 3 | * |
| 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 |
| 7 | * later version. |
| 8 | * |
| 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. |
| 13 | * |
| 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. |
| 17 | */ |
| 18 | |
| 19 | #include <stdlib.h> |
| 20 | #include <string.h> |
| 21 | #include <unistd.h> |
| 22 | #include <sys/types.h> |
Ethan Yonker | c798c9c | 2015-10-09 11:15:26 -0500 | [diff] [blame^] | 23 | #include <libgen.h> |
bigbiff | 7b4c7a6 | 2015-01-01 19:44:14 -0500 | [diff] [blame] | 24 | |
| 25 | #include "nls.h" |
| 26 | #include "c.h" |
| 27 | #include "xalloc.h" |
| 28 | |
| 29 | #include "exec_shell.h" |
| 30 | |
| 31 | #define DEFAULT_SHELL "/bin/sh" |
| 32 | |
| 33 | void exec_shell(void) |
| 34 | { |
| 35 | const char *shell = getenv("SHELL"), *shell_basename; |
| 36 | char *arg0; |
| 37 | if (!shell) |
| 38 | shell = DEFAULT_SHELL; |
| 39 | |
| 40 | shell_basename = basename(shell); |
| 41 | arg0 = xmalloc(strlen(shell_basename) + 2); |
| 42 | arg0[0] = '-'; |
| 43 | strcpy(arg0 + 1, shell_basename); |
| 44 | |
| 45 | execl(shell, arg0, NULL); |
| 46 | err(EXIT_FAILURE, _("failed to execute %s"), shell); |
| 47 | } |