153 lines
3.2 KiB
C
153 lines
3.2 KiB
C
/*
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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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/* 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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/* mount */
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#include <sys/mount.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <time.h> /* nanosleep */
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#include "cinit.h"
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/* global variable */
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struct listitem *list;
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int sock, logfd;
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pid_t cpid;
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/***********************************************************************
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* the main procedure
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*/
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int main(int argc, char **argv)
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{
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struct stat sbuf;
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struct sockaddr_un addr;
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struct timespec ts;
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char *initdir;
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set_signals(ACT_SERV); /* set signal handlers */
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logfd = 1; /* write to stdout */
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list = NULL; /* list of services is empty currently */
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initdir = CINIT_INIT;
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/* profile support */
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while(argc > 1) {
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if( !strncmp(PROFILE, argv[argc-1], strlen(PROFILE)) ) {
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initdir = (char *) malloc(
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strlen(CINIT_DIR) +
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strlen(&argv[argc-1][strlen(PROFILE)]) + 2
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);
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if(initdir == NULL) {
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panic();
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}
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strcpy(initdir,CINIT_DIR);
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strcat(initdir,SLASH);
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strcat(initdir,&argv[argc-1][strlen(PROFILE)]);
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break;
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}
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argc--;
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}
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/* stat, checkdir */
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if( stat(CINIT_INIT,&sbuf) ) {
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perror(MSG_INIT_MISS);
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panic();
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}
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if( ! S_ISDIR(sbuf.st_mode) ) {
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LOG(MSG_NOT_DIR);
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panic();
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}
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if( chdir(CINIT_INIT) == -1) {
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perror(MSG_CHDIR);
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panic();
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}
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/******************** TMPDIR **********************/
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if( mount(C_TMPMOUNT,CINIT_TMNT,C_TMPFS,0,NULL) == -1 ) {
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perror(MSG_ERR_MOUNT);
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panic();
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}
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/******************** begin socket **********************/
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sock = socket(AF_UNIX,SOCK_STREAM,0); /* create socket */
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if( sock == -1 ) {
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perror(MSG_SOCKET);
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panic();
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}
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/* tell the socket, _we_ want to get SIGIO! */
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cpid = getpid();
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if(fcntl(sock,F_SETOWN,cpid) == -1) {
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perror(MSG_FCNTL);
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panic();
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}
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/* O_SYNC: SIGIO will be called, O_NONBLOCK: don't block cinit */
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if ( fcntl(sock,F_SETFL,O_ASYNC|O_NONBLOCK) == -1) {
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perror(MSG_FCNTL);
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panic();
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}
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memset(&addr, 0, sizeof(addr) ); /* clear addr */
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strcpy(addr.sun_path, CINIT_SOCK);
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addr.sun_family = AF_UNIX;
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if(bind(sock,(struct sockaddr *)&addr,sizeof(addr)) == -1) {
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perror(MSG_BIND);
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panic();
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}
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/* start listening */
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if(listen(sock,SOCK_QUEUE) == -1) {
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perror(MSG_LISTEN);
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panic();
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}
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/******************** end socket **********************/
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/* initial run, only if we are 'real' init': not needed */
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// if( cpid == 1) {
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// if(! run_init_svc() ) {
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// panic();
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// }
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// }
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run_init_svc(initdir);
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/* free, if we malloc()ed before */
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if(initdir != CINIT_INIT) {
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free(initdir);
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}
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ts.tv_sec = SLEEP_INIT;
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while(1) {
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nanosleep(&ts,NULL);
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}
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}
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