96 lines
1.9 KiB
C
96 lines
1.9 KiB
C
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/*
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* push - anyone remember TOPS-20?
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*
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*/
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#include <config.h>
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#include <stdio.h>
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#include <errno.h>
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#include "builtins.h"
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#include "shell.h"
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#include "jobs.h"
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#include "bashgetopt.h"
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#ifndef errno
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extern int errno;
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#endif
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extern int dollar_dollar_pid;
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extern int last_command_exit_value;
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int
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push_builtin (list)
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WORD_LIST *list;
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{
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pid_t pid;
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int xstatus, opt;
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xstatus = EXECUTION_SUCCESS;
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reset_internal_getopt ();
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while ((opt = internal_getopt (list, "")) != -1)
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{
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switch (opt)
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{
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default:
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builtin_usage ();
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return (EX_USAGE);
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}
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}
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list = loptend;
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pid = make_child (savestring ("push"), 0);
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if (pid == -1)
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{
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builtin_error ("cannot fork: %s", strerror (errno));
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return (EXECUTION_FAILURE);
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}
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else if (pid == 0)
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{
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/* Shell variable adjustments: $SHLVL, $$, $PPID, $! */
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adjust_shell_level (1);
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dollar_dollar_pid = getpid ();
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set_ppid ();
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/* Clean up job control stuff. */
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stop_making_children ();
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cleanup_the_pipeline ();
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delete_all_jobs (0);
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last_asynchronous_pid = NO_PID;
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/* Make sure the job control code has the right values for
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the shell's process group and tty process group, and that
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the signals are set correctly for job control. */
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initialize_job_control (0);
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initialize_job_signals ();
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/* And read commands until exit. */
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reader_loop ();
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exit_shell (last_command_exit_value);
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}
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else
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{
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stop_pipeline (0, (COMMAND *)NULL);
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xstatus = wait_for (pid);
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return (xstatus);
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}
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}
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char *push_doc[] = {
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"Create a child that is an exact duplicate of the running shell",
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"and wait for it to exit. The $SHLVL, $!, $$, and $PPID variables",
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"are adjusted in the child. The return value is the exit status",
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"of the child.",
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(char *)NULL
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};
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struct builtin push_struct = {
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"push",
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push_builtin,
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BUILTIN_ENABLED,
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push_doc,
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"push",
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0
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};
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