X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=audiod_command.c;h=d424cf2e76f32ca90058685b68186b5a00be6a2b;hp=3bb94ad60a8a1079659105b792068e71045c9e01;hb=35726e230f83270ef01000fc57328101a8b0d89f;hpb=e56519a6ef7f28ce4974fc83400418e8dcb47f33;ds=sidebyside

diff --git a/audiod_command.c b/audiod_command.c
index 3bb94ad6..d424cf2e 100644
--- a/audiod_command.c
+++ b/audiod_command.c
@@ -1,25 +1,15 @@
 /*
  * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
  *
- *     This program is free software; you can redistribute it and/or modify
- *     it under the terms of the GNU General Public License as published by
- *     the Free Software Foundation; either version 2 of the License, or
- *     (at your option) any later version.
- *
- *     This program is distributed in the hope that it will be useful,
- *     but WITHOUT ANY WARRANTY; without even the implied warranty of
- *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *     GNU General Public License for more details.
- *
- *     You should have received a copy of the GNU General Public License
- *     along with this program; if not, write to the Free Software
- *     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
  */
 
 /** \file audiod_command.c commands for para_audiod */
 
-#include "para.h"
+#include <sys/types.h>
+#include <dirent.h>
 
+#include "para.h"
 #include "audiod.cmdline.h"
 #include "list.h"
 #include "close_on_fork.h"
@@ -350,7 +340,7 @@ err_out:
 	return 1;
 }
 
-int __noreturn com_term(int fd, __a_unused int argc, __a_unused char **argv)
+__noreturn int com_term(int fd, __a_unused int argc, __a_unused char **argv)
 {
 	close(fd);
 	clean_exit(EXIT_SUCCESS, "terminating on user request");
@@ -406,11 +396,27 @@ static int check_perms(uid_t uid)
 	return -E_UCRED_PERM;
 }
 
+/**
+ * handle arriving connections on the local socket
+ *
+ * \param accept_fd the fd to call accept() on
+ *
+ * This is called whenever para_audiod's main task detects an incoming
+ * connection by the readability of \a accept_fd. This function reads the
+ * command sent by the peer, checks the connecting user's permissions by using
+ * unix socket credentials (if supported by the OS) and calls the corresponding
+ * command handler if permissions are OK.
+ *
+ * \return positive on success, negative on errors
+ *
+ * \sa para_accept(), recv_cred_buffer()
+ * */
 int handle_connect(int accept_fd)
 {
 	int i, argc, ret, clifd = -1;
 	char *cmd = NULL, *p, *buf = para_calloc(MAXLINE), **argv = NULL;
 	struct sockaddr_un unix_addr;
+	uid_t uid;
 
 	ret = para_accept(accept_fd, &unix_addr, sizeof(struct sockaddr_un));
 	if (ret < 0)
@@ -419,8 +425,9 @@ int handle_connect(int accept_fd)
 	ret = recv_cred_buffer(clifd, buf, MAXLINE - 1);
 	if (ret < 0)
 		goto out;
+	uid = ret;
 	PARA_INFO_LOG("connection from user %i, buf: %s\n",  ret, buf);
-	ret = check_perms(ret);
+	ret = check_perms(uid);
 	if (ret < 0)
 		goto out;
 	ret = -E_INVALID_AUDIOD_CMD;
@@ -462,7 +469,9 @@ out:
 	}
 	return ret;
 }
-
+/**
+ * send the current audiod status to all connected stat clients
+ */
 void audiod_status_dump(void)
 {
 	struct timeval *t = wstime();
@@ -503,6 +512,7 @@ void audiod_status_dump(void)
 	old = stat_task->stat_item_values[SI_DECODER_FLAGS];
 	new = decoder_flags();
 	if (!old || strcmp(old, new)) {
+		free(old);
 		stat_client_write(new, SI_DECODER_FLAGS);
 		stat_task->stat_item_values[SI_DECODER_FLAGS] = new;
 	} else