m + receive messages

Signed-off-by: Mattias Andrée <maandree@member.fsf.org>

1 files changed, 89 insertions, 0 deletions

diff --git a/src/daemon.h b/src/daemon.h
new file mode 100644
index 0000000..e56fa76
--- /dev/null
+++ b/src/daemon.h
@@ -0,0 +1,89 @@
+/**
+ * Copyright © 2015  Mattias Andrée <maandree@member.fsf.org>
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+#include <stddef.h>
+
+
+
+/**
+ * The file descriptor for the socket.
+ */
+#define SOCK_FILENO  3
+
+/**
+ * The file descriptor for the state file.
+ */
+#define STATE_FILENO  4
+
+
+
+#ifndef t
+/**
+ * Go to `fail` if a statement evaluates to non-zero.
+ * 
+ * @param  ...  The statement.
+ */
+# define t(...)  do { if (__VA_ARGS__) goto fail; } while (0)
+#endif
+
+
+
+/**
+ * Wrapper for `read` that reads all available data.
+ * 
+ * Sets `errno` to `EBADMSG` on success.
+ * 
+ * @param   fd   The file descriptor from which to to read.
+ * @param   buf  Output parameter for the data.
+ * @param   n    Output parameter for the number of read bytes.
+ * @return       0 on success, -1 on error.
+ * 
+ * @throws  Any exception specified for read(3).
+ * @throws  Any exception specified for realloc(3).
+ */
+int readall(int fd, char **buf, size_t *n);
+
+/**
+ * Unmarshal a `NULL`-terminated string array.
+ * 
+ * The elements are not actually copied, subpointers
+ * to `buf` are stored in the returned list.
+ * 
+ * @param   buf  The marshalled array. Must end with a NUL byte.
+ * @param   len  The length of `buf`.
+ * @param   n    Output parameter for the number of elements. May be `NULL`
+ * @return       The list, `NULL` on error.
+ * 
+ * @throws  Any exception specified for realloc(3).
+ */
+char **restore_array(char* buf, size_t len, size_t* n);
+
+/**
+ * Create `NULL`-terminate subcopy of an list,
+ * 
+ * @param   list  The list.
+ * @param   n     The number of elements in the new sublist.
+ * @return        The sublist, `NULL` on error.
+ * 
+ * @throws  Any exception specified for malloc(3).
+ */
+char **sublist(char *const *list, size_t n);
+