#include "para.h"
#include "audiod.cmdline.h"
+#include "audiod.command_list.h"
#include "list.h"
#include "sched.h"
#include "ggo.h"
#include "write.h"
#include "fd.h"
#include "version.h"
-#include "audiod.command_list.h"
extern struct sched sched;
extern char *stat_item_values[NUM_STAT_ITEMS];
+typedef int audiod_command_handler_t(int, int, char **);
+static audiod_command_handler_t AUDIOD_COMMAND_HANDLERS;
+
+/* Defines one command of para_audiod. */
+struct audiod_command {
+ const char *name;
+ /* Pointer to the function that handles the command. */
+ /*
+ * Command handlers must never never close their file descriptor. A
+ * positive return value tells audiod that the status items have
+ * changed. In this case audiod will send an updated version of all
+ * status items to to each connected stat client.
+ */
+ audiod_command_handler_t *handler;
+ /* One-line description. */
+ const char *description;
+ /* Summary of the command line options. */
+ const char *usage;
+ /* The long help text. */
+ const char *help;
+};
static struct audiod_command audiod_cmds[] = {DEFINE_AUDIOD_CMD_ARRAY};
int fd;
/** Bitmask of those status items the client is interested in. */
uint64_t item_mask;
- /** See \ref stat_client flags. s*/
+ /** See \ref stat_client flags. */
unsigned flags;
/** Its entry in the list of stat clients. */
struct list_head node;
static int stat_client_add(int fd, uint64_t mask, int parser_friendly)
{
struct stat_client *new_client;
+ int ret;
if (num_clients >= MAX_STAT_CLIENTS) {
PARA_ERROR_LOG("maximal number of stat clients (%d) exceeded\n",
MAX_STAT_CLIENTS);
return -E_TOO_MANY_CLIENTS;
}
- PARA_INFO_LOG("adding client on fd %d\n", fd);
- new_client = para_calloc(sizeof(struct stat_client));
- new_client->fd = fd;
+ ret = dup(fd);
+ if (ret < 0)
+ return -ERRNO_TO_PARA_ERROR(errno);
+ new_client = para_calloc(sizeof(*new_client));
+ new_client->fd = ret;
+ PARA_INFO_LOG("adding client on fd %d\n", new_client->fd);
new_client->item_mask = mask;
if (parser_friendly)
new_client->flags = SCF_PARSER_FRIENDLY;
continue;
b = (sc->flags & SCF_PARSER_FRIENDLY)? &pfpb : &pb;
if (!b->buf)
- (void)WRITE_STATUS_ITEM(b, item_num, "%s\n",
- msg? msg : "");
+ WRITE_STATUS_ITEM(b, item_num, "%s\n", msg? msg : "");
ret = write(sc->fd, b->buf, b->offset);
if (ret == b->offset)
continue;
return ret;
}
-/*
- * command handlers don't close their fd on errors (ret < 0) so that
- * its caller can send an error message. Otherwise (ret >= 0) it's up
- * to each individual command to close the fd if necessary.
- */
-
static int com_help(int fd, int argc, char **argv)
{
int i, ret;
char *buf;
- const char *dflt = "No such command. Available commands:\n";
if (argc < 2) {
ret = dump_commands(fd);
free(buf);
goto out;
}
- ret = client_write(fd, dflt);
+ ret = client_write(fd, "No such command. Available commands:\n");
if (ret > 0)
ret = dump_commands(fd);
out:
- if (ret >= 0)
- close(fd);
- return ret;
+ return ret < 0? ret : 0;
}
static int com_tasks(int fd, __a_unused int argc, __a_unused char **argv)
{
char *tl = get_task_list(&sched);
int ret = 1;
+
if (tl)
ret = client_write(fd, tl);
free(tl);
- if (ret > 0)
- close(fd);
- return ret;
+ return ret < 0? ret : 0;
}
static int com_stat(int fd, int argc, char **argv)
char *item = stat_item_values[i];
if (!((one << i) & mask))
continue;
- (void)WRITE_STATUS_ITEM(&b, i, "%s\n", item? item : "");
+ WRITE_STATUS_ITEM(&b, i, "%s\n", item? item : "");
}
ret = client_write(fd, b.buf);
if (ret >= 0)
ret = stat_client_add(fd, mask, parser_friendly);
free(b.buf);
- return ret;
+ return ret < 0? ret : 0;
}
static int com_grab(int fd, int argc, char **argv)
{
- return grab_client_new(fd, argc, argv, &sched);
+ int ret = grab_client_new(fd, argc, argv, &sched);
+ return ret < 0? ret : 0;
}
-static int com_term(int fd, __a_unused int argc, __a_unused char **argv)
+static int com_term(__a_unused int fd, __a_unused int argc, __a_unused char **argv)
{
- close(fd);
return -E_AUDIOD_TERM;
}
-static int com_on(int fd, __a_unused int argc, __a_unused char **argv)
+static int com_on(__a_unused int fd, __a_unused int argc, __a_unused char **argv)
{
audiod_status = AUDIOD_ON;
- close(fd);
return 1;
}
-static int com_off(int fd, __a_unused int argc, __a_unused char **argv)
+static int com_off(__a_unused int fd, __a_unused int argc, __a_unused char **argv)
{
audiod_status = AUDIOD_OFF;
- close(fd);
return 1;
}
-static int com_sb(int fd, __a_unused int argc, __a_unused char **argv)
+static int com_sb(__a_unused int fd, __a_unused int argc, __a_unused char **argv)
{
audiod_status = AUDIOD_STANDBY;
- close(fd);
return 1;
}
-static int com_cycle(int fd, int argc, char **argv)
+static int com_cycle(__a_unused int fd, int argc, char **argv)
{
switch (audiod_status) {
case AUDIOD_ON:
return com_off(fd, argc, argv);
break;
}
- close(fd);
return 1;
}
msg = make_message("%s\n", version_single_line("audiod"));
ret = client_write(fd, msg);
free(msg);
- if (ret >= 0)
- close(fd);
- return ret;
+ return ret < 0? ret : 0;
}
-static int check_perms(uid_t uid)
+static int check_perms(uid_t uid, uid_t *whitelist)
{
int i;
if (!conf.user_allow_given)
return 1;
for (i = 0; i < conf.user_allow_given; i++)
- if (uid == conf.user_allow_arg[i])
+ if (uid == whitelist[i])
return 1;
return -E_UCRED_PERM;
}
*
* \param accept_fd The fd to accept connections on.
* \param rfds If \a accept_fd is not set in \a rfds, do nothing.
+ * \param uid_whitelist Array of UIDs which are allowed to connect.
*
* This is called in each iteration of the select loop. If there is an incoming
* connection on \a accept_fd, this function reads the command sent by the peer,
*
* \sa para_accept(), recv_cred_buffer()
* */
-int handle_connect(int accept_fd, fd_set *rfds)
+int handle_connect(int accept_fd, fd_set *rfds, uid_t *uid_whitelist)
{
int i, argc, ret, clifd;
char buf[MAXLINE], **argv = NULL;
if (ret < 0)
goto out;
uid = ret;
- PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
- ret = check_perms(uid);
+ PARA_INFO_LOG("connection from user %i, buf: %s\n", ret, buf);
+ ret = check_perms(uid, uid_whitelist);
if (ret < 0)
goto out;
ret = create_argv(buf, "\n", &argv);
ret = -E_INVALID_AUDIOD_CMD;
out:
free_argv(argv);
- if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
+ if (ret < 0 && ret != -E_CLIENT_WRITE) {
char *tmp = make_message("%s\n", para_strerror(-ret));
client_write(clifd, tmp);
free(tmp);
- close(clifd);
}
+ close(clifd);
return ret;
}
projects / paraslash.git / blobdiff