Share code to show pre-remove/post-install msgs.

lib/package_msg.c

@@ -0,0 +1,86 @@
+/*-
+ * Copyright (c) 2014 Juan Romero Pardines.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "xbps_api_impl.h"
+
+int HIDDEN
+xbps_cb_message(struct xbps_handle *xhp, xbps_dictionary_t pkgd, const char *key)
+{
+	xbps_data_t msg;
+	FILE *f = NULL;
+	const void *data = NULL;
+	const char *pkgver;
+	size_t len;
+	char *buf = NULL;
+	int rv = 0;
+
+	assert(xhp);
+	assert(pkgd);
+	assert(key);
+
+	xbps_dictionary_get_cstring_nocopy(pkgd, "pkgver", &pkgver);
+
+	/* show install-msg if exists */
+	msg = xbps_dictionary_get(pkgd, key);
+	if (xbps_object_type(msg) != XBPS_TYPE_DATA)
+		goto out;
+
+	data = xbps_data_data_nocopy(msg);
+	len = xbps_data_size(msg);
+	if ((f = fmemopen(__UNCONST(data), len, "r")) == NULL) {
+		rv = errno;
+		xbps_dbg_printf(xhp, "[%s] %s: fmemopen %s\n", __func__, pkgver, strerror(rv));
+		goto out;
+	};
+	buf = malloc(len);
+	assert(buf);
+	if (fread(buf, len, 1, f) != len) {
+		if (ferror(f)) {
+			rv = errno;
+			xbps_dbg_printf(xhp, "[%s] %s: fread %s\n", __func__, pkgver, strerror(rv));
+			goto out;
+		}
+	}
+	/* terminate buffer and notify client to show the post-install message */
+	buf[len] = '\0';
+
+	if (strcmp(key, "install-msg") == 0)
+		xbps_set_cb_state(xhp, XBPS_STATE_SHOW_INSTALL_MSG, 0, pkgver, "%s", buf);
+	else
+		xbps_set_cb_state(xhp, XBPS_STATE_SHOW_REMOVE_MSG, 0, pkgver, "%s", buf);
+
+out:
+	if (f != NULL)
+		fclose(f);
+	if (buf != NULL)
+		free(buf);
+
+	return rv;
+}