apps/lib/crt0/crt0.c

   1 /*
   2     meinOS - A unix-like x86 microkernel operating system
   3     Copyright (C) 2008  Janosch Gräf <janosch.graef@gmx.net>
   4
   5     This program is free software: you can redistribute it and/or modify
   6     it under the terms of the GNU Lesser General Public License as published by
   7     the Free Software Foundation, either version 3 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU Lesser General Public License for more details.
  14
  15     You should have received a copy of the GNU Lesser General Public License
  16     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 #include <sys/types.h>
  20 #include <sys/shm.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24 #include <syscall.h>
  25 #include <misc.h>
  26
  27 int main(int argc,char *argv[]);
  28 void _stdlib_init();     ///< @see apps/lib/stdlibc/stdlib.c
  29 void _libmeinos_init();  ///< @see apps/lib/libmeinos/misc.c
  30
  31 /*static int var;
  32
  33 static void get_cmdline(struct process_data *data,char ***_argv,int *_argc,char **_stdin,char **_stdout,char **_stderr) {
  34   int argc = data->argc;
  35   char **argv = malloc((argc+1)*sizeof(char*));
  36   size_t i = 0;
  37   size_t j;
  38
  39   for (j=0;j<argc;j++) {
  40     argv[j] = data->cmdline+i;
  41     i += strlen(data->cmdline+i)+1;
  42   }
  43   argv[j] = NULL;
  44
  45   if (data->has_stdin) {
  46     if (_stdin!=NULL) *_stdin = data->stdio+i;
  47     i += strlen(data->stdio+i)+1;
  48   }
  49   else if (_stdin!=NULL) *_stdin = NULL;
  50
  51   if (data->has_stdout) {
  52     if (_stdout!=NULL) *_stdout = data->stdio+i;
  53     i += strlen(data->stdio+i)+1;
  54   }
  55   else if (_stdout!=NULL) *_stdout = NULL;
  56
  57   if (data->has_stderr) {
  58     if (_stderr!=NULL) *_stderr = data->stdio+i;
  59     i += strlen(data->stdio+i)+1;
  60   }
  61   else if (_stderr!=NULL) *_stderr = NULL;
  62
  63   *_argv = argv;
  64   *_argc = argc;
  65 }
  66
  67 static void crt0_quit() {
  68   if (_process_data!=NULL) {
  69     // remove process data
  70     shmdt(_process_data);
  71     shmctl(var,IPC_RMID,NULL);
  72   }
  73 }*/
  74
  75 void _start() {
  76   char *backup_argv[] = { NULL };
  77   char **argv = backup_argv;
  78   int argc = 0;
  79
  80   // initialize libs
  81   _stdlib_init();
  82   _libmeinos_init();
  83
  84   // get process data
  85   int var = syscall_call(SYSCALL_PROC_GETVAR,1,getpid());
  86   if (var!=-1) proc_unpack_procdata(var,&argc,&argv);
  87
  88   /*if (var!=-1) {
  89     _process_data = shmat(var,NULL,0);
  90     if (_process_data!=NULL) get_cmdline(_process_data,&argv,&argc,&_stdin,&_stdout,&_stderr);
  91   }
  92   else _process_data = NULL;
  93
  94   // post initialize stdlibc
  95   _stdlib_init_post(_stdin,_stdout,_stderr);
  96   atexit(crt0_quit);*/
  97
  98   // call main function and exit
  99   exit(main(argc,argv));
 100
 101   while (1);
 102 }