38 lines
735 B
C
38 lines
735 B
C
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/*
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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
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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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