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#include <dirent.h>
#include <string.h>
#include <errno.h>
#include <sys/syscall.h>
#include "../dirstream.h"
/*
* readdir fills up the buffer with the readdir system call. it also
* gives a third parameter (currently ignored, but should be 1) that
* can with a future kernel be enhanced to be the number of entries
* to be gotten.
*/
#ifdef __ELF__
#pragma weak readdir_r = __libc_readdir_r
#endif
int
__libc_readdir_r (DIR * dir, struct dirent * entry, struct dirent ** ret)
{
int result;
if (!dir || !entry || !ret || !*ret) {
return EBADF;
}
if (dir->dd_size <= dir->dd_nextloc)
{
/* read dir->dd_max bytes of directory entries. */
__asm__ volatile ("mov %1, %%g1\n\t"
"mov %2, %%o0\n\t"
"mov %3, %%o1\n\t"
"mov %4, %%o3\n\t"
"t 0x10\n\t"
"bcc 1f\n\t"
"or %%g0, %%o0, %0\n\t"
"sub %%g0, %%o0, %0\n\t"
"1:\n\t"
: "r=" (result)
: "0" (SYS_getdents), "r" (dir->dd_fd),
"r" ((long) dir->dd_buf), "r" (dir->dd_max));
/* We assume we have getdents (). */
dir->dd_getdents = have_getdents;
if (result <= 0)
{
result = -result;
*ret = NULL;
return result;
}
dir->dd_size = result;
dir->dd_nextloc = 0;
}
/* We copy the dirent entry to entry. */
memcpy (entry, ((char *)dir->dd_buf) + dir->dd_nextloc,
sizeof(struct dirent));
*ret = entry;
/* Am I right? H.J. */
dir->dd_nextloc += entry->d_reclen;
/* We have to save the next offset here. */
dir->dd_nextoff = entry->d_off;
return 0;
}
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