diff options
Diffstat (limited to 'udevd.c')
| -rw-r--r-- | udevd.c | 73 |
1 files changed, 48 insertions, 25 deletions
@@ -109,10 +109,16 @@ static void msg_queue_insert(struct hotplug_msg *msg) } /* sort message by sequence number into list */ - list_for_each_entry_reverse(loop_msg, &msg_list, list) + list_for_each_entry_reverse(loop_msg, &msg_list, list) { if (loop_msg->seqnum < msg->seqnum) break; + if (loop_msg->seqnum == msg->seqnum) { + dbg("ignoring duplicate message seq %llu", msg->seqnum); + return; + } + } + /* store timestamp of queuing */ sysinfo(&info); msg->queue_time = info.uptime; @@ -123,7 +129,7 @@ static void msg_queue_insert(struct hotplug_msg *msg) /* run msg queue manager */ run_msg_q = 1; - return ; + return; } /* forks event and removes event from run queue when finished */ @@ -453,14 +459,45 @@ static void user_sighandler(void) } } -int main(int argc, char *argv[], char *envp[]) +static int init_udevsend_socket(void) { - struct sysinfo info; - int maxsockplus; struct sockaddr_un saddr; socklen_t addrlen; - int retval, fd; const int feature_on = 1; + int retval; + + memset(&saddr, 0x00, sizeof(saddr)); + saddr.sun_family = AF_LOCAL; + /* use abstract namespace for socket path */ + strcpy(&saddr.sun_path[1], UDEVD_SOCK_PATH); + addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1; + + udevsendsock = socket(AF_LOCAL, SOCK_DGRAM, 0); + if (udevsendsock == -1) { + dbg("error getting socket, %s", strerror(errno)); + return -1; + } + + /* the bind takes care of ensuring only one copy running */ + retval = bind(udevsendsock, (struct sockaddr *) &saddr, addrlen); + if (retval < 0) { + dbg("bind failed, %s", strerror(errno)); + close(udevsendsock); + return -1; + } + + /* enable receiving of the sender credentials */ + setsockopt(udevsendsock, SOL_SOCKET, SO_PASSCRED, &feature_on, sizeof(feature_on)); + + return 0; +} + +int main(int argc, char *argv[], char *envp[]) +{ + struct sysinfo info; + int maxsockplus; + int retval; + int fd; struct sigaction act; fd_set readfds; @@ -547,29 +584,15 @@ int main(int argc, char *argv[], char *envp[]) sigaction(SIGALRM, &act, NULL); sigaction(SIGCHLD, &act, NULL); - memset(&saddr, 0x00, sizeof(saddr)); - saddr.sun_family = AF_LOCAL; - /* use abstract namespace for socket path */ - strcpy(&saddr.sun_path[1], UDEVD_SOCK_PATH); - addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1; + if (init_udevsend_socket() < 0) { + if (errno == EADDRINUSE) + dbg("another udevd is running, exit"); + else + dbg("error initialising udevsend socket: %s", strerror(errno)); - udevsendsock = socket(AF_LOCAL, SOCK_DGRAM, 0); - if (udevsendsock == -1) { - dbg("error getting socket, exit"); - goto exit; - } - - /* the bind takes care of ensuring only one copy running */ - retval = bind(udevsendsock, (struct sockaddr *) &saddr, addrlen); - if (retval < 0) { - dbg("bind failed, exit"); - close(udevsendsock); goto exit; } - /* enable receiving of the sender credentials */ - setsockopt(udevsendsock, SOL_SOCKET, SO_PASSCRED, &feature_on, sizeof(feature_on)); - /* possible override of udev binary, used for testing */ udev_bin = getenv("UDEV_BIN"); if (udev_bin != NULL) |