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util: close all fds before freezing execution

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This commit is contained in:
Lennart Poettering 2011-03-11 00:52:13 +01:00
parent b997812119
commit 720ce21d44
3 changed files with 13 additions and 10 deletions
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2
TODO
View File

@ -22,8 +22,6 @@ F15:
* bind mounts are ignored
* SIGALRM in systemctl
* 0595f9a1c182a84581749823ef47c5f292e545f9 is borked, freezes shutdown
Features:

3
src/dbus-common.c
View File

@ -77,6 +77,9 @@ int bus_connect(DBusBusType t, DBusConnection **_bus, bool *private, DBusError *
return -EACCES;
}
/* This complexity should probably move into D-Bus itself:
*
* https://bugs.freedesktop.org/show_bug.cgi?id=35189 */
begin = tstamp = now(CLOCK_MONOTONIC);
for (;;) {

18
src/util.c
View File

@ -1815,8 +1815,9 @@ int close_all_fds(const int except[], unsigned n_except) {
if (ignore_file(de->d_name))
continue;
if ((r = safe_atoi(de->d_name, &fd)) < 0)
goto finish;
if (safe_atoi(de->d_name, &fd) < 0)
/* Let's better ignore this, just in case */
continue;
if (fd < 3)
continue;
@ -1839,16 +1840,13 @@ int close_all_fds(const int except[], unsigned n_except) {
continue;
}
if ((r = close_nointr(fd)) < 0) {
if (close_nointr(fd) < 0) {
/* Valgrind has its own FD and doesn't want to have it closed */
if (errno != EBADF)
goto finish;
if (errno != EBADF && r == 0)
r = -errno;
}
}
r = 0;
finish:
closedir(d);
return r;
}
@ -3619,6 +3617,10 @@ int wait_for_terminate_and_warn(const char *name, pid_t pid) {
}
void freeze(void) {
/* Make sure nobody waits for us on a socket anymore */
close_all_fds(NULL, 0);
sync();
for (;;)