Viewing file:  push.c (1.91 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* push - anyone remember TOPS-20?
*
*/
#include <config.h>
#include <stdio.h>
#include <errno.h>
#include "builtins.h"
#include "shell.h"
#include "jobs.h"
#include "bashgetopt.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)
{
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, $$, $PPID, $! */
adjust_shell_level (1);
dollar_dollar_pid = getpid ();
set_ppid ();
/* Clean up job control stuff. */
stop_making_children ();
cleanup_the_pipeline ();
delete_all_jobs (0);
last_asynchronous_pid = NO_PID;
/* Make sure the job control code has the right values for
the shell's process group and tty process group, and that
the signals are set correctly for job control. */
initialize_job_control (0);
initialize_job_signals ();
/* And read commands until exit. */
reader_loop ();
exit_shell (last_command_exit_value);
}
else
{
stop_pipeline (0, (COMMAND *)NULL);
xstatus = wait_for (pid);
return (xstatus);
}
}
char *push_doc[] = {
"Create a child that is an exact duplicate of the running shell",
"and wait for it to exit. The $SHLVL, $!, $$, 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
};
|