1 files changed, 117 insertions, 0 deletions
diff --git a/src/pwcache.h b/src/pwcache.h
new file mode 100644
index 0000000..f1a1db3
--- /dev/null
+++ b/src/pwcache.h
@@ -0,0 +1,117 @@
+/****************************************************************************
+ * bfs                                                                      *
+ * Copyright (C) 2020 Tavian Barnes <tavianator@tavianator.com>             *
+ *                                                                          *
+ * Permission to use, copy, modify, and/or distribute this software for any *
+ * purpose with or without fee is hereby granted.                           *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES *
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         *
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  *
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES   *
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN    *
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  *
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           *
+ ****************************************************************************/
+
+/**
+ * A caching wrapper for /etc/{passwd,group}.
+ */
+
+#ifndef BFS_PWCACHE_H
+#define BFS_PWCACHE_H
+
+#include <grp.h>
+#include <pwd.h>
+
+/**
+ * The user table.
+ */
+struct bfs_users;
+
+/**
+ * Parse the user table.
+ *
+ * @return
+ *         The parsed user table, or NULL on failure.
+ */
+struct bfs_users *bfs_users_parse(void);
+
+/**
+ * Get a user entry by name.
+ *
+ * @param users
+ *         The user table.
+ * @param name
+ *         The username to look up.
+ * @return
+ *         The matching user, or NULL if not found.
+ */
+const struct passwd *bfs_getpwnam(const struct bfs_users *users, const char *name);
+
+/**
+ * Get a user entry by ID.
+ *
+ * @param users
+ *         The user table.
+ * @param uid
+ *         The ID to look up.
+ * @return
+ *         The matching user, or NULL if not found.
+ */
+const struct passwd *bfs_getpwuid(const struct bfs_users *users, uid_t uid);
+
+/**
+ * Free a user table.
+ *
+ * @param users
+ *         The user table to free.
+ */
+void bfs_users_free(struct bfs_users *users);
+
+/**
+ * The group table.
+ */
+struct bfs_groups;
+
+/**
+ * Parse the group table.
+ *
+ * @return
+ *         The parsed group table, or NULL on failure.
+ */
+struct bfs_groups *bfs_groups_parse(void);
+
+/**
+ * Get a group entry by name.
+ *
+ * @param groups
+ *         The group table.
+ * @param name
+ *         The group name to look up.
+ * @return
+ *         The matching group, or NULL if not found.
+ */
+const struct group *bfs_getgrnam(const struct bfs_groups *groups, const char *name);
+
+/**
+ * Get a group entry by ID.
+ *
+ * @param groups
+ *         The group table.
+ * @param uid
+ *         The ID to look up.
+ * @return
+ *         The matching group, or NULL if not found.
+ */
+const struct group *bfs_getgrgid(const struct bfs_groups *groups, gid_t gid);
+
+/**
+ * Free a group table.
+ *
+ * @param groups
+ *         The group table to free.
+ */
+void bfs_groups_free(struct bfs_groups *groups);
+
+#endif // BFS_PWCACHE_H