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