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Diffstat (limited to 'framework/src/audit/audisp/plugins/remote/queue.h')
| -rw-r--r-- | framework/src/audit/audisp/plugins/remote/queue.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/framework/src/audit/audisp/plugins/remote/queue.h b/framework/src/audit/audisp/plugins/remote/queue.h new file mode 100644 index 00000000..5f5ef647 --- /dev/null +++ b/framework/src/audit/audisp/plugins/remote/queue.h @@ -0,0 +1,66 @@ +/* queue.h -- a queue abstraction + * Copyright 2009, 2011 Red Hat Inc., Durham, North Carolina. + * All Rights Reserved. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * Authors: + * Steve Grubb <sgrubb@redhat.com> + * Miloslav Trmač <mitr@redhat.com> + */ + +#ifndef QUEUE_HEADER +#define QUEUE_HEADER + +#include <sys/types.h> + +struct queue; + +enum { + // Queue storage. Both options can be set at the same time. + Q_IN_MEMORY = 1 << 0, // Keep a copy of the queue in memory + Q_IN_FILE = 1 << 1, // Store the queue in a file + // Other flags for use with Q_IN_FILE + Q_CREAT = 1 << 2, // Create the queue if it does not exist + Q_EXCL = 1 << 3, // With Q_CREAT, don't open an existing queue + Q_SYNC = 1 << 4, // fdatasync() after each operation + Q_RESIZE = 1 << 5, // resize the queue if needed +}; + +/* Open a queue using Q_FLAGS and return it. If Q_IN_FILE: use PATH for the + * file, NUM_ENTRIES must be the same for all users of the file unless Q_RESIZE + * is set. ENTRY_SIZE is the maximum length of a stored string, including the + * trailing NUL. If Q_IN_FILE, it must be the same for all users of the file. + * On error, return NULL and set errno. */ +struct queue *q_open(int q_flags, const char *path, size_t num_entries, + size_t entry_size); +/* Close Q. */ +void q_close(struct queue *q); + +/* Add DATA to tail of Q. Return 0 on success, -1 on error and set errno. */ +int q_append(struct queue *q, const char *data); + +/* Peek at head of Q, storing it into BUF of SIZE. Return 1 if an entry + * exists, 0 if queue is empty. On error, return -1 and set errno. */ +int q_peek(struct queue *q, char *buf, size_t size); + +/* Drop head of Q and return 0. On error, return -1 and set errno. */ +int q_drop_head(struct queue *q); + +/* Return the number of entries in Q. */ +size_t q_queue_length(const struct queue *q); + +#endif + |