mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-29 07:58:28 +00:00
368f6f3942
* .gitignore: New files. * Makefile.in (mostlyclean_dirs): Add libexec, if its Makefile exists. * autogen.sh (do_git): Autoreconf in exec as well. * configure.ac: Configure libexec on Android. * exec/Makefile.in: * exec/README: * exec/config-mips.m4.in: * exec/config.guess: * exec/config.h.in: * exec/config.sub: * exec/configure: * exec/configure.ac: * exec/deps.mk: * exec/exec.c (MIN, struct exec_open_command) (struct exec_map_command, struct exec_jump_command) (write_open_command, write_load_command, process_interpreter_1) (process_interpreter, process_program_header, insert_args) (exec_0): * exec/exec.h (_EXEC_H_, struct elf_header_32) (struct program_header_32, struct dt_entry_32) (struct elf_header_64, struct program_header_64) (struct dt_entry_64, struct exec_tracee): * exec/exec1.c (main): * exec/install-sh (scriptversion): * exec/loader-aarch64.s (_start): * exec/loader-armeabi.s (_start): * exec/loader-mips64el.s (__start): * exec/loader-mipsel.s (__start): * exec/loader-x86.s (_start): * exec/loader-x86_64.s (_start): * exec/mipsel-user.h (_MIPSEL_USER_H_): * exec/mipsfpu.c (MIPS_ABI_FP_ANY, fpu_reqs, valid_abi_p) (fp_mode_for_abi, cpu_supports_fr0_p, determine_fpu_mode): * exec/mipsfpu.h (_MIPSFPU_H_, FP_FR0): * exec/test.c (print_usage, main): * exec/trace.c (MAX_TRACEES, aarch64_set_regs, read_memory) (user_alloca, user_copy, remove_tracee, handle_clone) (syscall_trap_p, handle_exec, process_system_call, tracing_execve) (after_fork, find_tracee, exec_waitpid, exec_init): New files. * java/Makefile.in (CROSS_EXEC_BINS): Add exec1 and loader. ($(CROSS_EXEC_BINS) &): New target.
106 lines
2.2 KiB
C
106 lines
2.2 KiB
C
/* Program execution for Emacs.
|
||
|
||
Copyright (C) 2023 Free Software Foundation, Inc.
|
||
|
||
This file is part of GNU Emacs.
|
||
|
||
GNU Emacs 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.
|
||
|
||
GNU Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
|
||
|
||
#include <config.h>
|
||
|
||
#include <signal.h>
|
||
#include <stdio.h>
|
||
#include <unistd.h>
|
||
#include <stdlib.h>
|
||
#include <errno.h>
|
||
#include <string.h>
|
||
|
||
#include <sys/wait.h>
|
||
|
||
#include "exec.h"
|
||
|
||
|
||
|
||
static void
|
||
print_usage (void)
|
||
{
|
||
fprintf (stderr, "test loader-name program [args...]\n"
|
||
"Run the given program using the specified loader.\n");
|
||
}
|
||
|
||
|
||
|
||
extern char **environ;
|
||
|
||
/* This program uses libexec to wrap the execution of a child
|
||
process. */
|
||
|
||
int
|
||
main (int argc, char **argv)
|
||
{
|
||
pid_t pid, child;
|
||
int sig;
|
||
sigset_t sigset;
|
||
|
||
/* Check that there are a sufficient number of arguments. */
|
||
|
||
if (argc < 3)
|
||
{
|
||
print_usage ();
|
||
return 1;
|
||
}
|
||
|
||
exec_init (argv[1]);
|
||
|
||
/* Block SIGCHLD to avoid reentrant modification of the child
|
||
process list. */
|
||
|
||
sigemptyset (&sigset);
|
||
sigaddset (&sigset, SIGCHLD);
|
||
sigprocmask (SIG_BLOCK, &sigset, NULL);
|
||
|
||
if (!(pid = fork ()))
|
||
{
|
||
tracing_execve (argv[2], argv + 2, environ);
|
||
fprintf (stderr, "tracing_execve: %s\n",
|
||
strerror (errno));
|
||
exit (1);
|
||
}
|
||
else if (after_fork (pid))
|
||
{
|
||
fprintf (stderr, "after_fork: %s\n",
|
||
strerror (errno));
|
||
exit (1);
|
||
}
|
||
|
||
/* Now start waiting for child processes to exit. */
|
||
|
||
while (true)
|
||
{
|
||
child = exec_waitpid (-1, &sig, 0);
|
||
|
||
/* If pid is -1, a system call has been handled. */
|
||
|
||
if (child == -1)
|
||
continue;
|
||
|
||
/* If the main process exits, then exit as well. */
|
||
|
||
if (child == pid && !WIFSTOPPED (sig))
|
||
return (WIFEXITED (sig)
|
||
? WEXITSTATUS (sig)
|
||
: WTERMSIG (sig));
|
||
}
|
||
}
|