37 lines
729 B
C
37 lines
729 B
C
/*
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rewinddir -- rewind a directory stream
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last edit: 25-Apr-1987 D A Gwyn
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This is not simply a call to seekdir(), because seekdir()
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will use the current buffer whenever possible and we need
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rewinddir() to forget about buffered data.
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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 NULL
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#define NULL 0
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#endif
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#ifndef SEEK_SET
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#define SEEK_SET 0
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#endif
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void rewinddir(register DIR* dirp)
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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; /* invalid pointer */
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}
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dirp->dd_loc = dirp->dd_size = 0; /* invalidate buffer */
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(void)_lseek(dirp->dd_fd, (off_t)0, SEEK_SET); /* may set errno */
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}
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