From ff5444a95fa551c0bac1ca74f36770276a82703e Mon Sep 17 00:00:00 2001
From: Andre <maan@p133.(none)>
Date: Sat, 15 Apr 2006 19:40:41 +0200
Subject: [PATCH] avoid struct ucred in audiod.c

This is a preparation for making ucred optional. It moves everything
which uses unix socket credentials into the single source file net.c.
---
 audiod.c | 11 +++++------
 net.c    |  9 ++++++---
 net.h    |  2 +-
 3 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/audiod.c b/audiod.c
index f15ab710..b0f9f786 100644
--- a/audiod.c
+++ b/audiod.c
@@ -1417,14 +1417,14 @@ static int com_cycle(int fd, int argc, char **argv)
 	return 1;
 }
 
-static int check_perms(struct ucred *c)
+static int check_perms(uid_t uid)
 {
 	int i;
 
 	if (!conf.user_allow_given)
 		return 1;
 	for (i = 0; i < conf.user_allow_given; i++)
-		if (c->uid == conf.user_allow_arg[i])
+		if (uid == conf.user_allow_arg[i])
 			return 1;
 	return -E_UCRED_PERM;
 }
@@ -1432,7 +1432,6 @@ static int check_perms(struct ucred *c)
 static int handle_connect(void)
 {
 	int i, argc, ret, clifd = -1;
-	struct ucred c;
 	char *buf = para_malloc(MAXLINE), **argv = NULL;
 	struct sockaddr_un unix_addr;
 
@@ -1440,12 +1439,12 @@ static int handle_connect(void)
 	if (ret < 0)
 		goto out;
 	clifd = ret;
-	ret = recv_cred_buffer(clifd, buf, MAXLINE - 1, &c);
+	ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
 	if (ret < 0)
 		goto out;
-	PARA_INFO_LOG("pid: %i, uid: %i, gid: %i, ret: %i, buf: %s\n", c.pid, c.uid, c.gid, ret, buf);
+	PARA_INFO_LOG("connection from user %i\n",  ret);
 	buf[ret] = '\0';
-	ret = check_perms(&c);
+	ret = check_perms(ret);
 	if (ret < 0)
 		goto out;
 	argc = split_args(buf, &argv, "\n");
diff --git a/net.c b/net.c
index 599930aa..4d2f520f 100644
--- a/net.c
+++ b/net.c
@@ -392,10 +392,12 @@ static void dispose_fds(int *fds, int num)
  * \param size the size of \a buffer
  * \param cred the credentials are returned here
  *
+ * \return negative on errors, the user id on success.
+ *
  * \sa okir's Black Hats Manual
  * \sa recvmsg(2)
  */
-int recv_cred_buffer(int fd, char *buf, size_t size, struct ucred *cred)
+int recv_cred_buffer(int fd, char *buf, size_t size)
 {
 	char control[255];
 	struct msghdr msg;
@@ -403,6 +405,7 @@ int recv_cred_buffer(int fd, char *buf, size_t size, struct ucred *cred)
 	struct iovec iov;
 	int result;
 	int yes = 1;
+	struct ucred cred;
 
 	setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &yes, sizeof(int));
 	memset(&msg, 0, sizeof(msg));
@@ -420,8 +423,8 @@ int recv_cred_buffer(int fd, char *buf, size_t size, struct ucred *cred)
 	while (cmsg) {
 		if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type
 				== SCM_CREDENTIALS) {
-			memcpy(cred, CMSG_DATA(cmsg), sizeof(struct ucred));
-			result = iov.iov_len;
+			memcpy(&cred, CMSG_DATA(cmsg), sizeof(struct ucred));
+			result = cred.uid;
 		} else
 			if (cmsg->cmsg_level == SOL_SOCKET
 					&& cmsg->cmsg_type == SCM_RIGHTS) {
diff --git a/net.h b/net.h
index 18f36c09..f2046664 100644
--- a/net.h
+++ b/net.h
@@ -40,7 +40,7 @@ int recv_bin_buffer(int, char *, ssize_t);
 int para_accept(int, void *addr, socklen_t size);
 int create_pf_socket(const char *, struct sockaddr_un *, int mod);
 int init_unix_addr(struct sockaddr_un *, const char *);
-int recv_cred_buffer(int, char *, size_t, struct ucred *);
+int recv_cred_buffer(int, char *, size_t);
 ssize_t send_cred_buffer(int, char*);
 int recv_pattern(int fd, const char *pattern, size_t bufsize);
 int init_tcp_socket(int port);
-- 
2.39.2