Where is the *.c

luocolor

When programming,need lots of .h ,but where is the *.c file associated to the .h.
I find "extern" in many file.
eg.debian:/usr/include# cat stdio.h |grep extern
extern int rename (__const char *__old, __const char *__new) __THROW;

where can i get the implement of rename?
(implement in some .so?)

ro4tub

you should check the glibc library.

the following is from it:

[code:1]
/* Rename the file OLD to NEW.  */
int
rename (old, new)
     const char *old;
     const char *new;
{
  int save = errno;
  if (__link (old, new) < 0)
    {
      if (errno == EEXIST)
        {
          __set_errno (save);
          /* Race condition, required for 1003.1 conformance.  */
          if (__unlink (new) < 0 ||
              __link (old, new) < 0)
            return -1;
        }
      else
        return -1;
    }
  if (__unlink (old) < 0)
    {
      save = errno;
      if (__unlink (new) == 0)
        __set_errno (save);
      return -1;
    }
  return 0;
}[/code:1][/code]