159 lines
3.7 KiB
Plaintext
159 lines
3.7 KiB
Plaintext
/*
|
|
* (c) 2005 Nico Schottelius (nico-linux at schottelius.org)
|
|
* cinit.c
|
|
* part of cLinux/cinit
|
|
*/
|
|
|
|
/* *stat() */
|
|
#include <sys/stat.h>
|
|
#include <unistd.h>
|
|
|
|
/* open */
|
|
#include <fcntl.h>
|
|
|
|
/* siggnal */
|
|
#include <signal.h>
|
|
|
|
/* PATH_MAX */
|
|
#include <limits.h>
|
|
|
|
/* printf() */
|
|
//#include <stdio.h>
|
|
|
|
/* str* */
|
|
#include <string.h>
|
|
|
|
/* sockets */
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/un.h>
|
|
#include <stdio.h>
|
|
#include <signal.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
|
|
|
|
#include "cinit.h"
|
|
|
|
/* global variable */
|
|
struct svcl svc_list;
|
|
int sock;
|
|
|
|
/***********************************************************************
|
|
* sigio: client handling
|
|
*/
|
|
|
|
/* we are called, if one or _more_ connections are waiting */
|
|
void sigio(int signal)
|
|
{
|
|
struct ucred suck;
|
|
int len = sizeof(suck), lens;
|
|
int nsock;
|
|
struct sockaddr_un sun;
|
|
char buf;
|
|
|
|
lens=sizeof(sun);
|
|
memset(&sun,0,lens);
|
|
|
|
/* this is always us! */
|
|
// getsockopt(sock, SOL_SOCKET, SO_PEERCRED, &suck, &len);
|
|
// printf("orig angreifer: pid: %d uid: %d gid: %d\n",suck.pid,suck.uid,suck.gid);
|
|
|
|
do {
|
|
//s_tmp[s_idx] = accept(sock,(struct sockaddr *) &sun, (socklen_t *) &lens);
|
|
nsock = accept(sock,(struct sockaddr *) NULL, (socklen_t *) NULL);
|
|
|
|
// nsock = accept(sock,(struct sockaddr *) &sun, (socklen_t *) &lens);
|
|
// if( s_tmp[s_idx] == -1) {
|
|
if( nsock == -1) {
|
|
if (errno != EAGAIN) {
|
|
perror("accept");
|
|
_exit(1);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
//getsockopt(s_tmp[s_idx], SOL_SOCKET, SO_PEERCRED, &suck, &len);
|
|
getsockopt(nsock, SOL_SOCKET, SO_PEERCRED, &suck, &len);
|
|
printf("angreifer: pid: %d uid: %d gid: %d\n",suck.pid,suck.uid,suck.gid);
|
|
|
|
|
|
read(nsock,&buf,1);
|
|
|
|
printf("command: %d\n",buf);
|
|
|
|
while ( (len = read(nsock,&buf,1)) ) {
|
|
// printf("laenge: %d\n",len);
|
|
if(len == -1) {
|
|
// if(errno != EINVAL && errno != EAGAIN) {
|
|
perror("read");
|
|
return;
|
|
// _exit(1);
|
|
// }
|
|
}
|
|
if(buf == 0) break;
|
|
write(1,&buf,1);
|
|
}
|
|
printf("Fertig mit lesen\n");
|
|
|
|
write(nsock,"ok\n",4);
|
|
printf("fertig mit schreiben\n");
|
|
} while ( 1 );
|
|
|
|
printf("keine sockets mehr da..., sigio beendet sich jetzt.\n");
|
|
}
|
|
|
|
/***********************************************************************
|
|
* the main procedure
|
|
*/
|
|
|
|
int main()
|
|
{
|
|
struct stat sbuf;
|
|
int i;
|
|
|
|
struct sigaction sa;
|
|
|
|
/* signal handlers to ignore */
|
|
sa.sa_handler=SIG_IGN;
|
|
// sigaction(SIGINT,&sa,NULL); /* ignore ctr+c */
|
|
sigaction(SIGSTOP,&sa,NULL); /* ignore ctr+z, stop */
|
|
sigaction(SIGPIPE,&sa,NULL); /* what todo when pipe/fifo closed */
|
|
sigaction(SIGCHLD,&sa,NULL); /* what todo when child exited */
|
|
|
|
sa.sa_handler=sigio;
|
|
sigaction(SIGIO,&sa,NULL); /* what todo when data arrived on socket */
|
|
|
|
D_PRINTF(CINIT_INIT);
|
|
|
|
/* stat, checkdir */
|
|
if( stat(CINIT_INIT,&sbuf) ) {
|
|
cerr("PANIC ACTION: init dir missing", RT_PAR_FAIL);
|
|
} else if( ! S_ISDIR(sbuf.st_mode) ) {
|
|
cerr("PANIC ACTION: init is not a dir", RT_PAR_FAIL);
|
|
}
|
|
|
|
if( chdir(CINIT_INIT) == -1)
|
|
cerr("PANIC ACTION: chdir to /etc/cinit/init failed!",RT_PAR_FAIL);
|
|
|
|
/* count of started processes */
|
|
svc_list.process = 0;
|
|
|
|
/* initial run, only if we are 'real' init' */
|
|
// if( getpid() == 1) {
|
|
i = run_init_svc();
|
|
printf("Initialer Start rueckgabe: %d\n", i);
|
|
// }
|
|
|
|
/* signal handlers to do special things with */
|
|
// something else sa.sa_handler=SIG_IGN;
|
|
// sigaction(SIGUSR1,&sa,NULL); /* reboot on sigusr1 */
|
|
// sigaction(SIGUSR1,&sa,NULL); /* power-off on sigusr2 */
|
|
// sigaction(SIGTERM,&sa,NULL); /* halt on sigterm */
|
|
|
|
/* the main loop */
|
|
while(1) ;
|
|
|
|
}
|