static int linuxset_user_group(char *user, int uid, int gid){
if (set_caps(CAPS)!=0) __abort(-1,getuid()!= uid,"set_caps(CAPS) failed");
__abort(-1,(prctl(PR_SET_KEEPCAPS,1,0,0,0) < 0),"prctl failed in linuxset_user_group");
__abort(-1,(set_user_group(user,uid,gid)!=0),"set_user_group failed in linuxset_user_group");
if (set_caps(CAPSMIN)!=0) __abort(-1,(getuid()!= uid),"set_caps(CAPSMIN) failed");
return 0;
}
static bool checkuser(char *user, uid_t * uid, gid_t * gid)
{
struct passwd *pwds = NULL;
int status = 0;
pid_t pid = 0;
/* Do we actually _have_ to switch user? */
if (user == NULL)
return true;
pwds = getpwnam(user);
if (pwds == NULL) {
log_error("Invalid user name '%s' specified", user);
return false;
}
*uid = pwds->pw_uid;
*gid = pwds->pw_gid;
/* Validate the user name in another process */
pid = fork();
if (pid == -1) {
log_error("Cannot validate user name");
return false;
}
/* If we're in the child process, let's validate */
if (pid == 0) {
if (set_user_group(user, *uid, *gid) != 0)
exit(1);
/* If we got here we switched user/group */
exit(0);
}
while (waitpid(pid, &status, 0) != pid) {
/* Just wait */
}
/* The child must have exited cleanly */
if (WIFEXITED(status)) {
status = WEXITSTATUS(status);
/* If the child got out with 0 the user is ok */
if (status == 0) {
log_debug("User '%s' validated", user);
return true;
}
}
log_error("Error validating user '%s'", user);
return false;
}
static int linuxset_user_group(const char *user, int uid, int gid)
{
int caps_set = 0;
if (user == NULL)
return 0;
/* set capabilities enough for binding port 80 setuid/getuid */
if (getuid() == 0) {
if (set_caps(CAPS) != 0) {
if (getuid() != uid) {
log_error("set_caps(CAPS) failed for user '%s'", user);
return -1;
}
log_debug("set_caps(CAPS) failed for user '%s'", user);
}
/* make sure they are kept after setuid */
if (prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0) < 0) {
log_error("prctl failed in for user '%s'", user);
return -1;
}
caps_set = 1;
}
/* set setuid/getuid */
if (set_user_group(user, uid, gid) != 0) {
log_error("set_user_group failed for user '%s'", user);
return -1;
}
if (caps_set) {
/* set capability to binding port 80 read conf */
if (set_caps(CAPSMIN) != 0) {
if (getuid() != uid) {
log_error("set_caps(CAPSMIN) failed for user '%s'", user);
return -1;
}
log_debug("set_caps(CAPSMIN) failed for user '%s'", user);
}
}
return 0;
}
static int checkuser( char *user, uid_t *uid, gid_t *gid ) {
struct passwd *pwds = NULL;
int status = 0;
pid_t pid = 0;
__abort(1, user == NULL,"" );
pwds = getpwnam( user );
__abort(0, (pwds == NULL ),"Invalid user name '%s' specified", user );
*uid = pwds->pw_uid;
*gid = pwds->pw_gid;
pid = fork( );
__abort(0,( pid == -1 ), "Cannot validate user name" );
if( pid == 0 ) {
__die( set_user_group( user, *uid, *gid ) != 0,"set_user_group failed." );
exit( 0 );
}
while( waitpid( pid, &status, 0 ) != pid );
if( WIFEXITED( status ) ) {
status = WEXITSTATUS( status );
__abort(0, (status != 0),"User '%s' validated", user );
}
return 1;
}
static int child(arg_data *args, home_data *data, uid_t uid, gid_t gid)
{
int ret = 0;
/* check the pid file */
ret = check_pid(args);
if (args->vers != true && args->chck != true) {
if (ret == 122)
return ret;
if (ret < 0)
return ret;
}
#ifdef OS_LINUX
/* setuid()/setgid() only apply the current thread so we must do it now */
if (linuxset_user_group(args->user, uid, gid) != 0)
return 4;
#endif
/* Initialize the Java VM */
if (java_init(args, data) != true) {
log_debug("java_init failed");
return 1;
}
else
log_debug("java_init done");
/* Check wether we need to dump the VM version */
if (args->vers == true) {
log_error("jsvc (Apache Commons Daemon) " JSVC_VERSION_STRING);
log_error("Copyright (c) 1999-2011 Apache Software Foundation.");
if (java_version() != true) {
return -1;
}
else
return 0;
}
/* Check wether we need to dump the VM version */
else if (args->vershow == true) {
if (java_version() != true) {
return 7;
}
}
/* Do we have to do a "check-only" initialization? */
if (args->chck == true) {
if (java_check(args) != true)
return 2;
printf("Service \"%s\" checked successfully\n", args->clas);
return 0;
}
/* Load the service */
if (java_load(args) != true) {
log_debug("java_load failed");
return 3;
}
else
log_debug("java_load done");
/* Downgrade user */
#ifdef OS_LINUX
if (args->user && set_caps(0) != 0) {
log_debug("set_caps (0) failed");
return 4;
}
#else
if (set_user_group(args->user, uid, gid) != 0)
return 4;
#endif
/* Start the service */
umask(envmask);
if (java_start() != true) {
log_debug("java_start failed");
return 5;
}
else
log_debug("java_start done");
/* Install signal handlers */
handler_hup = signal_set(SIGHUP, handler);
handler_usr1 = signal_set(SIGUSR1, handler);
handler_usr2 = signal_set(SIGUSR2, handler);
handler_trm = signal_set(SIGTERM, handler);
handler_int = signal_set(SIGINT, handler);
controlled = getpid();
log_debug("Waiting for a signal to be delivered");
create_tmp_file(args);
while (!stopping) {
#if defined(OSD_POSIX)
java_sleep(60);
/* pause(); */
#else
/* pause() is not threadsafe */
sleep(60);
#endif
if(doreopen) {
doreopen = false;
set_output(args->outfile, args->errfile, args->redirectstdin, args->procname);
}
if(dosignal) {
dosignal = false;
java_signal();
}
}
remove_tmp_file(args);
log_debug("Shutdown or reload requested: exiting");
/* Stop the service */
if (java_stop() != true)
return 6;
if (doreload == true)
ret = 123;
else
ret = 0;
/* Destroy the service */
java_destroy();
/* Destroy the Java VM */
if (JVM_destroy(ret) != true)
return 7;
return ret;
}