]>
Commit | Line | Data |
---|---|---|
28ef6c31 JA |
1 | /* |
2 | * push - anyone remember TOPS-20? | |
3 | * | |
4 | */ | |
5 | ||
3185942a JA |
6 | /* |
7 | Copyright (C) 1999-2009 Free Software Foundation, Inc. | |
8 | ||
9 | This file is part of GNU Bash. | |
10 | Bash is free software: you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation, either version 3 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | Bash is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
22 | */ | |
23 | ||
28ef6c31 JA |
24 | #include <config.h> |
25 | #include <stdio.h> | |
26 | #include <errno.h> | |
27 | ||
28 | #include "builtins.h" | |
29 | #include "shell.h" | |
30 | #include "jobs.h" | |
31 | #include "bashgetopt.h" | |
3185942a | 32 | #include "common.h" |
28ef6c31 JA |
33 | |
34 | #ifndef errno | |
35 | extern int errno; | |
36 | #endif | |
37 | ||
38 | extern int dollar_dollar_pid; | |
39 | extern int last_command_exit_value; | |
40 | ||
41 | int | |
42 | push_builtin (list) | |
43 | WORD_LIST *list; | |
44 | { | |
45 | pid_t pid; | |
46 | int xstatus, opt; | |
47 | ||
48 | xstatus = EXECUTION_SUCCESS; | |
49 | reset_internal_getopt (); | |
50 | while ((opt = internal_getopt (list, "")) != -1) | |
51 | { | |
52 | switch (opt) | |
53 | { | |
54 | default: | |
55 | builtin_usage (); | |
56 | return (EX_USAGE); | |
57 | } | |
58 | } | |
59 | list = loptend; | |
60 | ||
61 | pid = make_child (savestring ("push"), 0); | |
62 | if (pid == -1) | |
63 | { | |
64 | builtin_error ("cannot fork: %s", strerror (errno)); | |
65 | return (EXECUTION_FAILURE); | |
66 | } | |
67 | else if (pid == 0) | |
68 | { | |
69 | /* Shell variable adjustments: $SHLVL, $$, $PPID, $! */ | |
70 | adjust_shell_level (1); | |
71 | dollar_dollar_pid = getpid (); | |
72 | set_ppid (); | |
73 | ||
74 | /* Clean up job control stuff. */ | |
75 | stop_making_children (); | |
76 | cleanup_the_pipeline (); | |
77 | delete_all_jobs (0); | |
78 | ||
79 | last_asynchronous_pid = NO_PID; | |
80 | ||
81 | /* Make sure the job control code has the right values for | |
82 | the shell's process group and tty process group, and that | |
83 | the signals are set correctly for job control. */ | |
84 | initialize_job_control (0); | |
85 | initialize_job_signals (); | |
86 | ||
87 | /* And read commands until exit. */ | |
88 | reader_loop (); | |
89 | exit_shell (last_command_exit_value); | |
90 | } | |
91 | else | |
92 | { | |
93 | stop_pipeline (0, (COMMAND *)NULL); | |
94 | xstatus = wait_for (pid); | |
95 | return (xstatus); | |
96 | } | |
97 | } | |
98 | ||
99 | char *push_doc[] = { | |
3185942a JA |
100 | "Create child shell.", |
101 | "", | |
28ef6c31 JA |
102 | "Create a child that is an exact duplicate of the running shell", |
103 | "and wait for it to exit. The $SHLVL, $!, $$, and $PPID variables", | |
104 | "are adjusted in the child. The return value is the exit status", | |
105 | "of the child.", | |
106 | (char *)NULL | |
107 | }; | |
108 | ||
109 | struct builtin push_struct = { | |
110 | "push", | |
111 | push_builtin, | |
112 | BUILTIN_ENABLED, | |
113 | push_doc, | |
114 | "push", | |
115 | 0 | |
116 | }; |