From 4aca87515a5083ae0e31ce3177189fd43b6d05ac Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Sat, 3 Jan 2015 13:58:15 +0100
Subject: patch to Vanilla Tomato 1.28

---
 release/src/router/busybox/libpwdgrp/uidgid_get.c | 134 ++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 release/src/router/busybox/libpwdgrp/uidgid_get.c

(limited to 'release/src/router/busybox/libpwdgrp/uidgid_get.c')

diff --git a/release/src/router/busybox/libpwdgrp/uidgid_get.c b/release/src/router/busybox/libpwdgrp/uidgid_get.c
new file mode 100644
index 00000000..92290bfd
--- /dev/null
+++ b/release/src/router/busybox/libpwdgrp/uidgid_get.c
@@ -0,0 +1,134 @@
+/*
+Copyright (c) 2001-2006, Gerrit Pape
+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.
+   3. The name of the author may not be used to endorse or promote products
+      derived from this software without specific prior written permission.
+
+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 "libbb.h"
+
+/* Always sets uid and gid */
+int FAST_FUNC get_uidgid(struct bb_uidgid_t *u, const char *ug, int numeric_ok)
+{
+	struct passwd *pwd;
+	struct group *gr;
+	char *user, *group;
+	unsigned n;
+
+	user = (char*)ug;
+	group = strchr(ug, ':');
+	if (group) {
+		int sz = (++group) - ug;
+		user = alloca(sz);
+		/* copies sz-1 bytes, stores terminating '\0' */
+		safe_strncpy(user, ug, sz);
+	}
+	if (numeric_ok) {
+		n = bb_strtou(user, NULL, 10);
+		if (!errno) {
+			u->uid = n;
+			pwd = getpwuid(n);
+			/* If we have e.g. "500" string without user */
+			/* with uid 500 in /etc/passwd, we set gid == uid */
+			u->gid = pwd ? pwd->pw_gid : n;
+			goto skip;
+		}
+	}
+	/* Either it is not numeric, or caller disallows numeric username */
+	pwd = getpwnam(user);
+	if (!pwd)
+		return 0;
+	u->uid = pwd->pw_uid;
+	u->gid = pwd->pw_gid;
+
+ skip:
+	if (group) {
+		if (numeric_ok) {
+			n = bb_strtou(group, NULL, 10);
+			if (!errno) {
+				u->gid = n;
+				return 1;
+			}
+		}
+		gr = getgrnam(group);
+		if (!gr) return 0;
+		u->gid = gr->gr_gid;
+	}
+	return 1;
+}
+void FAST_FUNC xget_uidgid(struct bb_uidgid_t *u, const char *ug)
+{
+	if (!get_uidgid(u, ug, 1))
+		bb_error_msg_and_die("unknown user/group %s", ug);
+}
+
+/* chown-like:
+ * "user" sets uid only,
+ * ":group" sets gid only
+ * "user:" sets uid and gid (to user's primary group id)
+ * "user:group" sets uid and gid
+ * ('unset' uid or gid retains the value it has on entry)
+ */
+void FAST_FUNC parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group)
+{
+	char *group;
+
+	/* Check if there is a group name */
+	group = strchr(user_group, '.'); /* deprecated? */
+	if (!group)
+		group = strchr(user_group, ':');
+	else
+		*group = ':'; /* replace '.' with ':' */
+
+	/* Parse "user[:[group]]" */
+	if (!group) { /* "user" */
+		u->uid = get_ug_id(user_group, xuname2uid);
+	} else if (group == user_group) { /* ":group" */
+		u->gid = get_ug_id(group + 1, xgroup2gid);
+	} else {
+		if (!group[1]) /* "user:" */
+			*group = '\0';
+		xget_uidgid(u, user_group);
+	}
+}
+
+#if 0
+#include <stdio.h>
+int main()
+{
+	unsigned u;
+	struct bb_uidgid_t ug;
+	u = get_uidgid(&ug, "apache", 0);
+	printf("%u = %u:%u\n", u, ug.uid, ug.gid);
+	ug.uid = ug.gid = 1111;
+	u = get_uidgid(&ug, "apache", 0);
+	printf("%u = %u:%u\n", u, ug.uid, ug.gid);
+	ug.uid = ug.gid = 1111;
+	u = get_uidgid(&ug, "apache:users", 0);
+	printf("%u = %u:%u\n", u, ug.uid, ug.gid);
+	ug.uid = ug.gid = 1111;
+	u = get_uidgid(&ug, "apache:users", 0);
+	printf("%u = %u:%u\n", u, ug.uid, ug.gid);
+	return 0;
+}
+#endif
-- 
cgit v1.2.3-54-g00ecf