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import cinit from unix.schottelius.org

Browse source 
Signed-off-by: Nico Schottelius <nico@ikn.schottelius.org>
This commit is contained in:
Nico Schottelius 2009-09-16 12:53:45 +02:00
commit 423ba10303
13396 changed files with 269468 additions and 0 deletions
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software/cinit/browse_source/cinit-0.0.7/old/cinit.c06 Normal file
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/*
* (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) ;
}