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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 18:33:23 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 18:33:23 +0000 |
commit | 1d5cace9db9aef76f26b2d7ba54bbb76443b00b2 (patch) | |
tree | 314a15dd1aa103da13bdc83ba1d2105a290bc5ba /examples/loadables/push.c | |
parent | Initial commit. (diff) | |
download | bash-upstream/5.0.tar.xz bash-upstream/5.0.zip |
Adding upstream version 5.0.upstream/5.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'examples/loadables/push.c')
-rw-r--r-- | examples/loadables/push.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/examples/loadables/push.c b/examples/loadables/push.c new file mode 100644 index 0000000..9bcd5c3 --- /dev/null +++ b/examples/loadables/push.c @@ -0,0 +1,117 @@ +/* + * push - anyone remember TOPS-20? + * + */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash 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 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> +#include <stdio.h> +#include <errno.h> + +#include "builtins.h" +#include "shell.h" +#include "jobs.h" +#include "bashgetopt.h" +#include "common.h" + +#ifndef errno +extern int errno; +#endif + +extern int dollar_dollar_pid; +extern int last_command_exit_value; + +int +push_builtin (list) + WORD_LIST *list; +{ + pid_t pid; + int xstatus, opt; + + xstatus = EXECUTION_SUCCESS; + reset_internal_getopt (); + while ((opt = internal_getopt (list, "")) != -1) + { + switch (opt) + { + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + pid = make_child (savestring ("push"), 0); + if (pid == -1) + { + builtin_error ("cannot fork: %s", strerror (errno)); + return (EXECUTION_FAILURE); + } + else if (pid == 0) + { + /* Shell variable adjustments: $SHLVL, $$, $PPID, $! */ + adjust_shell_level (1); + dollar_dollar_pid = getpid (); + set_ppid (); + + /* Clean up job control stuff. */ + stop_making_children (); + cleanup_the_pipeline (); + delete_all_jobs (0); + + last_asynchronous_pid = NO_PID; + + /* Make sure the job control code has the right values for + the shell's process group and tty process group, and that + the signals are set correctly for job control. */ + initialize_job_control (0); + initialize_job_signals (); + + /* And read commands until exit. */ + reader_loop (); + exit_shell (last_command_exit_value); + } + else + { + stop_pipeline (0, (COMMAND *)NULL); + xstatus = wait_for (pid); + return (xstatus); + } +} + +char *push_doc[] = { + "Create child shell.", + "", + "Create a child that is an exact duplicate of the running shell", + "and wait for it to exit. The $SHLVL, $!, $$, and $PPID variables", + "are adjusted in the child. The return value is the exit status", + "of the child.", + (char *)NULL +}; + +struct builtin push_struct = { + "push", + push_builtin, + BUILTIN_ENABLED, + push_doc, + "push", + 0 +}; |