Port FFS tools over from Building Block repository.

1 files changed, 208 insertions, 0 deletions

diff --git a/clib/src/mq.c b/clib/src/mq.c
new file mode 100644
index 0000000..6faf108
--- /dev/null
+++ b/clib/src/mq.c
@@ -0,0 +1,208 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2014
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/*
+ *   File: mqueue.c
+ * Author: Shaun Wetzstein <shaun@us.ibm.com>
+ *  Descr: POSIX message queue wrapper
+ *   Note:
+ *   Date: 10/07/10
+ */
+
+#include <unistd.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <malloc.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <limits.h>
+#include <fcntl.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "libclib.h"
+#include "mq.h"
+
+#define MQUEUE_ROOT        "/dev/mqueue"
+
+/* ======================================================================= */
+
+int mqueue_init(mqueue_t * self, const char *service)
+{
+	assert(self != NULL);
+
+	self->service = strdup(service);
+	self->in = self->out = (mqd_t) - 1;
+
+	return 0;
+}
+
+int mqueue_create(mqueue_t * self, pid_t tid)
+{
+	assert(self != NULL);
+
+	char path[pathconf(MQUEUE_ROOT, _PC_PATH_MAX)];
+
+	sprintf(path, "%s/%d->%s", MQUEUE_ROOT, tid, self->service);
+
+	self->out = open(path, O_WRONLY | O_CREAT, S_IWUSR);
+	if (self->out == (mqd_t) - 1) {
+		ERRNO(errno);
+		return -1;
+	}
+
+	sprintf(path, "%s/%d<-%s", MQUEUE_ROOT, tid, self->service);
+
+	self->in = open(path, O_RDONLY | O_CREAT, S_IRUSR);
+	if (self->in == (mqd_t) - 1) {
+		ERRNO(errno);
+		return -1;
+	}
+
+	return 0;
+}
+
+int mqueue_open(mqueue_t * self, char *path)
+{
+	assert(self != NULL);
+
+	if (path != NULL) {
+		char *endp = NULL;
+		(void)strtol(path + 1, &endp, 10);
+
+		if (strncmp(endp, "->", 2) == 0) {
+			self->in = mq_open((char *)path, O_RDONLY,
+					   S_IRWXU, NULL);
+			if (self->in == (mqd_t) - 1) {
+				ERRNO(errno);
+				return -1;
+			}
+		} else if (strncmp(endp, "<-", 2) == 0) {
+			self->out = mq_open((char *)path, O_WRONLY,
+					    S_IRWXU, NULL);
+			if (self->out == (mqd_t) - 1) {
+				ERRNO(errno);
+				return -1;
+			}
+		} else {
+			UNEXPECTED("'%s' invalid service", path);
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+int mqueue_close(mqueue_t * self, char *path)
+{
+	assert(self != NULL);
+
+	if (path != NULL) {
+		char *endp = NULL;
+		(void)strtol(path + 1, &endp, 10);
+
+		if (strncmp(endp, "->", 2) == 0) {
+			if (self->in != (mqd_t) - 1)
+				mq_close(self->in), self->in = (mqd_t) - 1;
+		} else if (strncmp(endp, "<-", 2) == 0) {
+			if (self->out != (mqd_t) - 1)
+				mq_close(self->out), self->out = (mqd_t) - 1;
+		} else {
+			UNEXPECTED("'%s' invalid service", path);
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+mqueue_attr_t mqueue_getattr(mqueue_t * self)
+{
+	assert(self != NULL);
+
+	mqueue_attr_t attr;
+	mq_getattr(self->in, &attr);
+
+	return attr;
+}
+
+int mqueue_delete(mqueue_t * self)
+{
+	assert(self != NULL);
+
+	char path[pathconf(MQUEUE_ROOT, _PC_PATH_MAX)];
+	if (self->in != (mqd_t) - 1) {
+		sprintf(path, "%s/%d->%s",
+			MQUEUE_ROOT, gettid(), self->service);
+		unlink(path);
+		if (mq_close(self->in) == (mqd_t) - 1) {
+			ERRNO(errno);
+			return -1;
+		}
+		self->in = (mqd_t) - 1;
+	}
+
+	if (self->out != (mqd_t) - 1) {
+		sprintf(path, "%s/%d<-%s",
+			MQUEUE_ROOT, gettid(), self->service);
+		unlink(path);
+		if (mq_close(self->in) == (mqd_t) - 1) {
+			ERRNO(errno);
+			return -1;
+		}
+		self->out = (mqd_t) - 1;
+	}
+
+	if (self->service) {
+		free((void *)self->service);
+		self->service = NULL;
+	}
+
+	return 0;
+}
+
+int mqueue_send(mqueue_t * self, void *ptr, size_t len)
+{
+	assert(self != NULL);
+
+	int rc = mq_send(self->out, (char *)ptr, len, 0);
+	if (rc == -1) {
+		ERRNO(errno);
+		return -1;
+	}
+
+	return rc;
+}
+
+int mqueue_receive(mqueue_t * self, void *ptr, size_t len)
+{
+	assert(self != NULL);
+
+	int rc = mq_receive(self->in, (char *)ptr, len, 0);
+	if (rc == -1) {
+		ERRNO(errno);
+		return -1;
+	}
+
+	return rc;
+}
+
+/* ======================================================================= */