/usr/include/dovecot/mbox-lock.h is in dovecot-dev 1:2.2.9-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | #ifndef MBOX_LOCK_H
#define MBOX_LOCK_H
/* NOTE: if mbox file is not open, it's opened. if it is open but file has
been overwritten (ie. inode has changed), it's reopened. */
int mbox_lock(struct mbox_mailbox *mbox, int lock_type,
unsigned int *lock_id_r);
int ATTR_NOWARN_UNUSED_RESULT
mbox_unlock(struct mbox_mailbox *mbox, unsigned int lock_id);
unsigned int mbox_get_cur_lock_id(struct mbox_mailbox *mbox);
void mbox_dotlock_touch(struct mbox_mailbox *mbox);
#endif
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