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udevd: export initial sequence number on startup

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This commit is contained in:
Kay Sievers 2006-04-25 18:50:56 +02:00
parent d59c84effd
commit 90cd961e2c
1 changed files with 38 additions and 9 deletions
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47
udevd.c
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@ -250,7 +250,7 @@ static void udev_event_run(struct uevent_msg *msg)
/* child */ /* child */
close(uevent_netlink_sock); close(uevent_netlink_sock);
close(udevd_sock); close(udevd_sock);
if (inotify_fd > 0) if (inotify_fd >= 0)
close(inotify_fd); close(inotify_fd);
close(signal_pipe[READ_END]); close(signal_pipe[READ_END]);
close(signal_pipe[WRITE_END]); close(signal_pipe[WRITE_END]);
@ -287,7 +287,7 @@ static void msg_queue_insert(struct uevent_msg *msg)
strlcpy(filename, udev_root, sizeof(filename)); strlcpy(filename, udev_root, sizeof(filename));
strlcat(filename, "/" EVENT_SEQNUM, sizeof(filename)); strlcat(filename, "/" EVENT_SEQNUM, sizeof(filename));
fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0644); fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0644);
if (fd > 0) { if (fd >= 0) {
char str[32]; char str[32];
int len; int len;
@ -821,6 +821,33 @@ static int init_uevent_netlink_sock(void)
return 0; return 0;
} }
static void export_initial_seqnum(void)
{
char filename[PATH_SIZE];
int fd;
char seqnum[32];
ssize_t len = 0;
strlcpy(filename, sysfs_path, sizeof(filename));
strlcat(filename, "/kernel/uevent_seqnum", sizeof(filename));
fd = open(filename, O_RDONLY);
if (fd >= 0) {
len = read(fd, seqnum, sizeof(seqnum)-1);
close(fd);
}
if (len <= 0) {
strcpy(seqnum, "0\n");
len = 3;
}
strlcpy(filename, udev_root, sizeof(filename));
strlcat(filename, "/" EVENT_SEQNUM, sizeof(filename));
fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0644);
if (fd >= 0) {
write(fd, seqnum, len);
close(fd);
}
}
int main(int argc, char *argv[], char *envp[]) int main(int argc, char *argv[], char *envp[])
{ {
int retval; int retval;
@ -893,6 +920,8 @@ int main(int argc, char *argv[], char *envp[])
sysfs_init(); sysfs_init();
udev_rules_init(&rules, 1); udev_rules_init(&rules, 1);
export_initial_seqnum();
if (daemonize) { if (daemonize) {
pid_t pid; pid_t pid;
@ -1014,7 +1043,7 @@ int main(int argc, char *argv[], char *envp[])
FD_SET(signal_pipe[READ_END], &readfds); FD_SET(signal_pipe[READ_END], &readfds);
FD_SET(udevd_sock, &readfds); FD_SET(udevd_sock, &readfds);
FD_SET(uevent_netlink_sock, &readfds); FD_SET(uevent_netlink_sock, &readfds);
if (inotify_fd > 0) if (inotify_fd >= 0)
FD_SET(inotify_fd, &readfds); FD_SET(inotify_fd, &readfds);
fdcount = select(maxfd+1, &readfds, NULL, NULL, NULL); fdcount = select(maxfd+1, &readfds, NULL, NULL, NULL);
@ -1046,7 +1075,7 @@ int main(int argc, char *argv[], char *envp[])
} }
/* rules directory inotify watch */ /* rules directory inotify watch */
if ((inotify_fd > 0) && FD_ISSET(inotify_fd, &readfds)) { if ((inotify_fd >= 0) && FD_ISSET(inotify_fd, &readfds)) {
int nbytes; int nbytes;
/* discard all possible events, we can just reload the config */ /* discard all possible events, we can just reload the config */
@ -1089,16 +1118,16 @@ exit:
udev_rules_cleanup(&rules); udev_rules_cleanup(&rules);
sysfs_cleanup(); sysfs_cleanup();
if (signal_pipe[READ_END] > 0) if (signal_pipe[READ_END] >= 0)
close(signal_pipe[READ_END]); close(signal_pipe[READ_END]);
if (signal_pipe[WRITE_END] > 0) if (signal_pipe[WRITE_END] >= 0)
close(signal_pipe[WRITE_END]); close(signal_pipe[WRITE_END]);
if (udevd_sock > 0) if (udevd_sock >= 0)
close(udevd_sock); close(udevd_sock);
if (inotify_fd > 0) if (inotify_fd >= 0)
close(inotify_fd); close(inotify_fd);
if (uevent_netlink_sock > 0) if (uevent_netlink_sock >= 0)
close(uevent_netlink_sock); close(uevent_netlink_sock);
logging_close(); logging_close();