AcessNative/libacess-native.so_src/main.c

   1 /*
   2  */
   3 #include <stdarg.h>
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6 #include <string.h>
   7 #include <unistd.h>
   8
   9 extern int      giSyscall_ClientID;
  10 extern void     Request_Preinit(void);
  11 extern int      acess__SysOpen(const char *Path, unsigned int flags);
  12
  13 #ifdef __WINDOWS__
  14 int DllMain(void)
  15 {
  16         fprintf(stderr, "TODO: Windows libacessnative setup\n");
  17         return 0;
  18 }
  19
  20 #endif
  21
  22 #ifdef __linux__
  23 int __attribute__ ((constructor(102))) libacessnative_init(int argc, char *argv[], char **envp);
  24
  25 const char *getenv_p(char **envp, const char *name)
  26 {
  27         size_t  namelen = strlen(name);
  28         for(; *envp; envp ++)
  29         {
  30                 if( strncmp(*envp, name, namelen) != 0 )
  31                         continue ;
  32                 if( (*envp)[namelen] != '=' )
  33                         continue ;
  34                 return (*envp)+namelen+1;
  35         }
  36         return 0;
  37 }
  38
  39 int libacessnative_init(int argc, char *argv[], char **envp)
  40 {
  41         Request_Preinit();
  42
  43         const char *preopens = getenv_p(envp, "AN_PREOPEN");
  44         printf("preopens = %s\n", preopens);
  45         if( preopens )
  46         {
  47                 while( *preopens )
  48                 {
  49                         const char *splitter = strchr(preopens, ':');
  50                         size_t  len;
  51                         if( !splitter ) {
  52                                 len = strlen(preopens);
  53                         }
  54                         else {
  55                                 len = splitter - preopens;
  56                         }
  57                         char path[len+1];
  58                         memcpy(path, preopens, len);
  59                         path[len] = 0;
  60                         int fd = acess__SysOpen(path, 6);       // WRITE,READ,no EXEC
  61                         if( fd == -1 ) {
  62                                 fprintf(stderr, "Unable to preopen '%s'\n", path);
  63                         }
  64
  65                         if( !splitter )
  66                                 break;
  67                         preopens = splitter + 1;
  68                 }
  69         }
  70
  71 //      if( !getenv("ACESSNATIVE_ID")
  72
  73         return 0;
  74 }
  75 #endif
  76
  77
  78 void Debug(const char *format, ...)
  79 {
  80         va_list args;
  81         printf("Debug: ");
  82         va_start(args, format);
  83         vfprintf(stdout, format, args);
  84         va_end(args);
  85         printf("\n");
  86 }
  87
  88 void Warning(const char *format, ...)
  89 {
  90         va_list args;
  91         printf("Warning: ");
  92         va_start(args, format);
  93         vfprintf(stdout, format, args);
  94         va_end(args);
  95         printf("\n");
  96 }
  97
  98 void __libc_csu_fini()
  99 {
 100 }
 101
 102 void __libc_csu_init()
 103 {
 104 }
 105