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dirent.lha
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dirent
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telldir.c
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C/C++ Source or Header
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1988-09-02
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836b
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41 lines
/*
telldir -- report directory stream position
last edit: 25-Apr-1987 D A Gwyn
NOTE: 4.nBSD directory compaction makes seekdir() & telldir()
practically impossible to do right. Avoid using them!
*/
#ifdef unos
#include <errno.h>
#else
#include <sys/errno.h>
#endif
#include <sys/types.h>
#include <dirent.h>
extern off_t lseek();
extern int errno;
#ifndef SEEK_CUR
#define SEEK_CUR 1
#endif
off_t
telldir( dirp ) /* return offset of next entry */
DIR *dirp; /* stream from opendir() */
{
if ( dirp == NULL || dirp->dd_buf == NULL )
{
errno = EFAULT;
return -1; /* invalid pointer */
}
if ( dirp->dd_loc < dirp->dd_size ) /* valid index */
return ((struct dirent *)&dirp->dd_buf[dirp->dd_loc])->d_off;
else /* beginning of next directory block */
return lseek( dirp->dd_fd, (off_t)0, SEEK_CUR );
}