pkgs/by-name/li/libfprint-2-tod1-broadcom/wrapper-lib.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4
   5 static const char from[] =  "/var/lib/fprint/fw";
   6 static const char to[]   = "@to@";
   7
   8 FILE* fopen_wrapper(const char* fn, const char* mode) {
   9     size_t fn_len = strlen(fn);
  10     size_t from_len = strlen(from);
  11     if (fn_len > from_len && memcmp(fn, from, from_len) == 0) {
  12         size_t to_len = strlen(to);
  13         char* rewritten = calloc(fn_len + (to_len - from_len) + 1, 1);
  14         memcpy(rewritten, to, to_len);
  15         memcpy(rewritten + to_len, fn + from_len, fn_len - from_len);
  16
  17         printf("fopen_wrapper.c: Replacing path '%s' with '%s'\n", fn, rewritten);
  18         FILE* result = fopen(rewritten, mode);
  19         free(rewritten);
  20         return result;
  21     }
  22     return fopen(fn, mode);
  23 }