Rename some files in the library to better describe what they do.

--HG--
rename : lib/config_files.c => lib/package_config_files.c
rename : lib/configure.c => lib/package_configure.c
rename : lib/orphans.c => lib/package_orphans.c
rename : lib/purge.c => lib/package_purge.c
rename : lib/register.c => lib/package_register.c
rename : lib/remove.c => lib/package_remove.c
rename : lib/remove_obsoletes.c => lib/package_remove_obsoletes.c
rename : lib/requiredby.c => lib/package_requiredby.c
rename : lib/state.c => lib/package_state.c
rename : lib/unpack.c => lib/package_unpack.c

lib/package_remove_obsoletes.c

@@ -0,0 +1,169 @@
+/*-
+ * Copyright (c) 2009-2010 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 <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <libgen.h>
+
+#include <xbps_api.h>
+
+int HIDDEN
+xbps_remove_obsoletes(prop_dictionary_t oldd, prop_dictionary_t newd)
+{
+	prop_object_iterator_t iter, iter2 = NULL;
+	prop_object_t obj, obj2 = NULL;
+	prop_string_t oldstr = NULL, newstr = NULL;
+	struct stat st;
+	const char *array_str = "files";
+	const char *oldhash = NULL;
+	char *dname = NULL, *file = NULL;
+	int rv = 0;
+	bool found, dolinks = false;
+
+again:
+	iter = xbps_get_array_iter_from_dict(oldd, array_str);
+	if (iter == NULL)
+		return errno;
+	iter2 = xbps_get_array_iter_from_dict(newd, array_str);
+	if (iter2 == NULL) {
+		prop_object_iterator_release(iter);
+		return errno;
+	}
+	/*
+	 * Check for obsolete files, i.e files/links available in
+	 * the old package list not found in new package list.
+	 */
+	while ((obj = prop_object_iterator_next(iter))) {
+		rv = 0;
+		found = false;
+		oldstr = prop_dictionary_get(obj, "file");
+		if (oldstr == NULL) {
+			rv = errno;
+			goto out;
+		}
+		file = xbps_xasprintf(".%s",
+		    prop_string_cstring_nocopy(oldstr));
+		if (file == NULL) {
+			rv = errno;
+			goto out;
+		}
+		if (strcmp(array_str, "files") == 0) {
+			prop_dictionary_get_cstring_nocopy(obj,
+			    "sha256", &oldhash);
+			rv = xbps_check_file_hash(file, oldhash);
+			if (rv == ENOENT || rv == ERANGE) {
+				/*
+				 * Skip unexistent and files that do not
+				 * match the hash.
+				 */
+				free(file);
+				rv = 0;
+				continue;
+			}
+		} else {
+			/*
+			 * Only remove dangling symlinks.
+			 */
+			if (stat(file, &st) == -1) {
+				if (errno != ENOENT) {
+					free(file);
+					rv = errno;
+					goto out;
+				}
+			} else {
+				free(file);
+				continue;
+			}
+		}
+
+		while ((obj2 = prop_object_iterator_next(iter2))) {
+			newstr = prop_dictionary_get(obj2, "file");
+			if (newstr == NULL) {
+				rv = errno;
+				goto out;
+			}
+			if (prop_string_equals(oldstr, newstr)) {
+				found = true;
+				break;
+			}
+		}
+		prop_object_iterator_reset(iter2);
+		if (found) {
+			free(file);
+			continue;
+		}
+
+		/*
+		 * Obsolete file found, remove it.
+		 */
+		if (remove(file) == -1) {
+			fprintf(stderr,
+			    "WARNING: couldn't remove obsolete %s: %s\n",
+			    dolinks ? "link" : "file",
+			    prop_string_cstring_nocopy(oldstr));
+			free(file);
+			continue;
+		}
+		printf("Removed obsolete %s: %s\n",
+		    dolinks ? "link" : "file",
+		    prop_string_cstring_nocopy(oldstr));
+		/*
+		 * Try to remove the directory where the obsole file or link
+		 * was currently living on.
+		 */
+		dname = dirname(file);
+		if (rmdir(dname) == -1) {
+			if (errno != 0 && errno != EEXIST && errno != ENOTEMPTY)
+				fprintf(stderr,
+				    "WARNING: couldn't remove obsolete "
+				    "directory %s: %s\n", dname,
+				    strerror(errno));
+		}
+		free(file);
+	}
+	if (!dolinks) {
+		/*
+		 * Now look for obsolete links.
+		 */
+		dolinks = true;
+		array_str = "links";
+		prop_object_iterator_release(iter2);
+		prop_object_iterator_release(iter);
+		iter2 = NULL;
+		goto again;
+	}
+
+out:
+	prop_object_iterator_release(iter2);
+	prop_object_iterator_release(iter);
+
+	return rv;
+}