import cinit from unix.schottelius.org

Signed-off-by: Nico Schottelius <nico@ikn.schottelius.org>

software/cinit/browse_source/cinit-0.0.6/serv/cinit.c

@@ -0,0 +1,163 @@
+/* 
+ * (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>
+
+/* str* */
+#include <string.h>
+
+/* sockets */
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+/* mount */
+#include <sys/mount.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+
+#include <time.h>    /* nanosleep */
+
+#include "cinit.h"
+
+/* global variable */
+struct listitem *list;
+int sock, logfd;
+
+/***********************************************************************
+ * the main procedure
+ */
+
+#ifdef TIME_ME
+time_t start;
+#endif
+
+int main(int argc, char **argv)
+{
+   struct stat sbuf;
+   pid_t pid;
+   struct sockaddr_un addr;
+   struct timespec ts;
+   char *initdir;
+   
+#ifdef TIME_ME
+   start = time(NULL);
+#endif
+
+   set_signals(ACT_SERV);  /* set signal handlers */
+   logfd = 1;              /* write to stdout */
+   list = NULL;            /* list of services is empty currently */
+
+   initdir = CINIT_INIT;
+
+   /* profile support */
+   while(argc) {
+      D_PRINTF(argv[argc-1]);
+      if( !strncmp(PROFILE, argv[argc-1], strlen(PROFILE)) ) {
+         initdir = (char *) malloc(
+                              strlen(CINIT_DIR) +
+                              strlen(&argv[argc-1][strlen(PROFILE)]) + 2
+                              );
+         if(initdir == NULL) {
+            panic();
+         }
+         strcpy(initdir,CINIT_DIR);
+         strcat(initdir,SLASH);
+         strcat(initdir,&argv[argc-1][strlen(PROFILE)]);
+         break;
+      }
+      argc--;
+   }
+   D_PRINTF(initdir);
+
+   /* stat, checkdir */
+   if( stat(CINIT_INIT,&sbuf) ) {
+      perror(MSG_INIT_MISS);
+      panic();
+   }
+   if( ! S_ISDIR(sbuf.st_mode) ) {
+      LOG(MSG_NOT_DIR);
+      panic();
+   }
+   if( chdir(CINIT_INIT) == -1) {
+      perror(MSG_CHDIR);
+      panic();
+   }
+
+   /******************** TMPDIR  **********************/
+   if( mount(C_TMPMOUNT,CINIT_TMNT,C_TMPFS,0,NULL) == -1 ) {
+      perror(MSG_ERR_MOUNT);
+      panic();
+    }
+
+   /******************** begin socket **********************/
+   sock = socket(AF_UNIX,SOCK_STREAM,0); /* create socket */
+   if( sock == -1 ) {
+      perror(MSG_SOCKET);
+      panic();
+   }
+   
+   /* tell the socket, _we_ want to get SIGIO! */
+   pid = getpid();
+   if(fcntl(sock,F_SETOWN,pid) == -1) {
+      perror(MSG_FCNTL);
+      panic();
+   }
+
+   /* O_SYNC: SIGIO will be called, O_NONBLOCK: don't block cinit */
+   if ( fcntl(sock,F_SETFL,O_ASYNC|O_NONBLOCK) == -1) {
+      perror(MSG_FCNTL);
+      panic();
+   }
+   
+   memset(&addr, 0, sizeof(addr) ); /* clear addr */
+   strcpy(addr.sun_path, CINIT_SOCK);
+   addr.sun_family = AF_UNIX;
+   
+   if(bind(sock,(struct sockaddr *)&addr,sizeof(addr)) == -1) {
+      perror(MSG_BIND);
+      panic();
+   }
+   
+   /* start listening */
+   if(listen(sock,SOCK_QUEUE) == -1) {
+      perror(MSG_LISTEN);
+      panic();
+   }
+   /******************** end socket **********************/
+
+   /* initial run, only if we are 'real' init': not needed */
+//   if( pid == 1) {
+      run_init_svc();
+//   }
+
+   D_PRINTF("fertig gestartet");
+   
+   /* the main loop: sleep until a signal comes in */
+   ts.tv_sec = -1;
+   if(ts.tv_sec < 0) {
+      D_PRINTF("is signed");
+      ts.tv_sec = 1 << ((sizeof(ts.tv_sec) * 8)-1);
+      ts.tv_sec = ts.tv_sec - 1;
+   }
+
+   while(1) {
+      nanosleep(&ts,NULL);
+   }
+}