soltools/checkdll/checkdll.c

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  27
  28
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <errno.h>
  32 #include <unistd.h>
  33 #include <dlfcn.h>
  34
  35 /*
  36  * NOTE: Since no one is really interested in correct unload behavior I've
  37  * disabled the shared library unload check. If you want to reenable it comment
  38  * the following line out
  39  */
  40 #define NO_UNLOAD_CHECK
  41
  42 static const char *pprog_name   = "checkdll";
  43 static const char *psymbol      = "GetVersionInfo";
  44
  45 void usage()
  46 {
  47     fprintf(stderr, "usage: %s [-s] <dllname>\n", pprog_name);
  48     return;
  49 }
  50
  51 int main(int argc, char *argv[])
  52 {
  53     int     rc;
  54     int     silent=0;
  55     void    *phandle;
  56     char    *(*pfun)(void);
  57
  58     if ( argc < 2 || argc > 4) {
  59         usage();
  60         return 1;
  61     }
  62
  63     if ( !strcmp(argv[1],"-s") ) {
  64         silent = 1;
  65         ++argv, --argc;
  66     }
  67
  68     if ( (rc = access( argv[1], R_OK )) == -1 ) {
  69         fprintf(stderr, "%s: ERROR: %s: %s\n",
  70                 pprog_name, argv[1], strerror(errno));
  71         return 2;
  72     }
  73
  74     if (!silent) printf("Checking DLL %s ...", argv[1]);
  75     fflush(stdout);
  76
  77     if ( (phandle = dlopen(argv[1], RTLD_NOW)) != NULL ) {
  78         if  ( (pfun = (char *(*)(void))dlsym(phandle, psymbol)) != NULL ) {
  79             if (!silent) printf(": ok\n");
  80         }
  81         else
  82         {
  83             printf(": WARNING: %s\n", dlerror());
  84         }
  85 #ifdef NO_UNLOAD_CHECK
  86         _exit(0);
  87 #else
  88         dlclose(phandle);
  89 #endif
  90         return 0;
  91     }
  92
  93     printf(": ERROR: %s\n", dlerror());
  94     return 3;
  95 }
  96
  97