/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2002-2009. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
/*
* After a vfork() (or fork()) the child exec()s to this program which
* sets up the child and exec()s to the user program (see spawn_start()
* in sys.c and ticket OTP-4389).
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#define NEED_CHILD_SETUP_DEFINES
#include "sys.h"
#include "erl_misc_utils.h"
#ifdef SIG_SIGSET /* Old SysV */
void sys_sigrelease(int sig)
{
sigrelse(sig);
}
#else /* !SIG_SIGSET */
#ifdef SIG_SIGNAL /* Old BSD */
sys_sigrelease(int sig)
{
sigsetmask(sigblock(0) & ~sigmask(sig));
}
#else /* !SIG_SIGNAL */ /* The True Way - POSIX!:-) */
void sys_sigrelease(int sig)
{
sigset_t mask;
sigemptyset(&mask);
sigaddset(&mask, sig);
sigprocmask(SIG_UNBLOCK, &mask, (sigset_t *)NULL);
}
#endif /* !SIG_SIGNAL */
#endif /* !SIG_SIGSET */
#if defined(__ANDROID__)
static int system_properties_fd(void);
#endif /* __ANDROID__ */
#if defined(__ANDROID__)
#define SHELL "/system/bin/sh"
#else
#define SHELL "/bin/sh"
#endif /* __ANDROID__ */
int
main(int argc, char *argv[])
{
int i, from, to;
int erts_spawn_executable = 0;
/* OBSERVE!
* Keep child setup after fork() (implemented in sys.c) up to date
* if changes are made here.
*/
if (argc != CS_ARGV_NO_OF_ARGS) {
if (argc < CS_ARGV_NO_OF_ARGS) {
return 1;
} else {
erts_spawn_executable = 1;
}
}
if (strcmp("false", argv[CS_ARGV_UNBIND_IX]) != 0)
if (erts_unbind_from_cpu_str(argv[CS_ARGV_UNBIND_IX]) != 0)
return 1;
for (i = 0; i < CS_ARGV_NO_OF_DUP2_OPS; i++) {
if (argv[CS_ARGV_DUP2_OP_IX(i)][0] == '-'
&& argv[CS_ARGV_DUP2_OP_IX(i)][1] == '\0')
break;
if (sscanf(argv[CS_ARGV_DUP2_OP_IX(i)], "%d:%d", &from, &to) != 2)
return 1;
if (dup2(from, to) < 0)
return 1;
}
if (sscanf(argv[CS_ARGV_FD_CR_IX], "%d:%d", &from, &to) != 2)
return 1;
#if defined(HAVE_CLOSEFROM)
closefrom(from);
#elif defined(__ANDROID__)
if (from <= to) {
int spfd = system_properties_fd();
for (i = from; i <= to; i++) {
if (i != spfd) {
(void) close(i);
}
}
}
#else /* !__ANDROID__ */
for (i = from; i <= to; i++) {
(void) close(i);
}
#endif /* HAVE_CLOSEFROM */
if (!(argv[CS_ARGV_WD_IX][0] == '.' && argv[CS_ARGV_WD_IX][1] == '\0')
&& chdir(argv[CS_ARGV_WD_IX]) < 0)
return 1;
#if defined(USE_SETPGRP_NOARGS) /* SysV */
(void) setpgrp();
#elif defined(USE_SETPGRP) /* BSD */
(void) setpgrp(0, getpid());
#else /* POSIX */
(void) setsid();
#endif
sys_sigrelease(SIGCHLD);
sys_sigrelease(SIGINT);
sys_sigrelease(SIGUSR1);
if (erts_spawn_executable) {
if (argv[CS_ARGV_NO_OF_ARGS + 1] == NULL) {
execl(argv[CS_ARGV_NO_OF_ARGS],argv[CS_ARGV_NO_OF_ARGS],
(char *) NULL);
} else {
execv(argv[CS_ARGV_NO_OF_ARGS],&(argv[CS_ARGV_NO_OF_ARGS + 1]));
}
} else {
execl(SHELL, "sh", "-c", argv[CS_ARGV_CMD_IX], (char *) NULL);
}
return 1;
}
#if defined(__ANDROID__)
static int system_properties_fd(void)
{
int fd;
char *env;
env = getenv("ANDROID_PROPERTY_WORKSPACE");
if (!env) {
return -1;
}
fd = atoi(env);
return fd;
}
#endif /* __ANDROID__ */
