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