Adding upstream version 1:4.13+dfsg1.upstream/1%4.13+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 144 insertions, 0 deletions

diff --git a/lib/commonio.h b/lib/commonio.h
new file mode 100644
index 0000000..e63c5b4
--- /dev/null
+++ b/lib/commonio.h
@@ -0,0 +1,144 @@
+/*
+ * SPDX-FileCopyrightText: 1990 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2001 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/* $Id$ */
+#ifndef COMMONIO_H
+#define COMMONIO_H
+
+#include "defines.h" /* bool */
+
+/*
+ * Linked list entry.
+ */
+struct commonio_entry {
+	/*@null@*/char *line;
+	/*@null@*/void *eptr;		/* struct passwd, struct spwd, ... */
+	/*@dependent@*/ /*@null@*/struct commonio_entry *prev;
+	/*@owned@*/ /*@null@*/struct commonio_entry *next;
+	bool changed:1;
+};
+
+/*
+ * Operations depending on database type: passwd, group, shadow etc.
+ */
+struct commonio_ops {
+	/*
+	 * Make a copy of the object (for example, struct passwd)
+	 * and all strings pointed by it, in malloced memory.
+	 */
+	/*@null@*/ /*@only@*/void *(*dup) (const void *);
+
+	/*
+	 * free() the object including any strings pointed by it.
+	 */
+	void (*free) (/*@out@*/ /*@only@*/void *);
+
+	/*
+	 * Return the name of the object (for example, pw_name
+	 * for struct passwd).
+	 */
+	const char *(*getname) (const void *);
+
+	/*
+	 * Parse a string, return object (in static area -
+	 * should be copied using the dup operation above).
+	 */
+	void *(*parse) (const char *);
+
+	/*
+	 * Write the object to the file (this calls putpwent()
+	 * for struct passwd, for example).
+	 */
+	int (*put) (const void *, FILE *);
+
+	/*
+	 * fgets and fputs (can be replaced by versions that
+	 * understand line continuation conventions).
+	 */
+	/*@null@*/char *(*fgets) (/*@returned@*/ /*@out@*/char *s, int n, FILE *stream);
+	int (*fputs) (const char *, FILE *);
+
+	/*
+	 * open_hook and close_hook.
+	 * If non NULL, these functions will be called after the database
+	 * is open or before it is closed.
+	 * They return 0 on failure and 1 on success.
+	 */
+	/*@null@*/int (*open_hook) (void);
+	/*@null@*/int (*close_hook) (void);
+};
+
+/*
+ * Database structure.
+ */
+struct commonio_db {
+	/*
+	 * Name of the data file.
+	 */
+	char filename[1024];
+
+	/*
+	 * Operations from above.
+	 */
+	/*@observer@*/const struct commonio_ops *ops;
+
+	/*
+	 * Currently open file stream.
+	 */
+	/*@dependent@*/ /*@null@*/FILE *fp;
+
+#ifdef WITH_SELINUX
+	/*@null@*/char *scontext;
+#endif
+	/*
+	 * Default permissions and owner for newly created data file.
+         */
+	mode_t st_mode;
+	uid_t st_uid;
+	gid_t st_gid;
+	/*
+	 * Head, tail, current position in linked list.
+	 */
+	/*@owned@*/ /*@null@*/struct commonio_entry *head;
+	/*@dependent@*/ /*@null@*/struct commonio_entry *tail;
+	/*@dependent@*/ /*@null@*/struct commonio_entry *cursor;
+
+	/*
+	 * Various flags.
+	 */
+	bool changed:1;
+	bool isopen:1;
+	bool locked:1;
+	bool readonly:1;
+	bool setname:1;
+};
+
+extern int commonio_setname (struct commonio_db *, const char *);
+extern bool commonio_present (const struct commonio_db *db);
+extern int commonio_lock (struct commonio_db *);
+extern int commonio_lock_nowait (struct commonio_db *, bool log);
+extern int commonio_open (struct commonio_db *, int);
+extern /*@observer@*/ /*@null@*/const void *commonio_locate (struct commonio_db *, const char *);
+extern int commonio_update (struct commonio_db *, const void *);
+#ifdef ENABLE_SUBIDS
+extern int commonio_append (struct commonio_db *, const void *);
+#endif				/* ENABLE_SUBIDS */
+extern int commonio_remove (struct commonio_db *, const char *);
+extern int commonio_rewind (struct commonio_db *);
+extern /*@observer@*/ /*@null@*/const void *commonio_next (struct commonio_db *);
+extern int commonio_close (struct commonio_db *);
+extern int commonio_unlock (struct commonio_db *);
+extern void commonio_del_entry (struct commonio_db *,
+                                const struct commonio_entry *);
+extern int commonio_sort_wrt (struct commonio_db *shadow,
+                              const struct commonio_db *passwd);
+extern int commonio_sort (struct commonio_db *db,
+                          int (*cmp) (const void *, const void *));
+
+#endif