43 lines
1.7 KiB
Diff
43 lines
1.7 KiB
Diff
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Process 1 (aka init) needs to be started with an empty signal mask. That
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includes the process 1 that's started after the initrd is finished. When the
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initrd is using systemd (as it does with dracut based initrds) then it is
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systemd that calls the real init. Normally this is systemd again, except
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when the user uses for instance "init=/bin/bash" on the kernel command line.
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---
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main.c | 9 +++++++++
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1 file changed, 9 insertions(+)
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--- src/core/main.c
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+++ src/core/main.c 2014-02-27 13:54:21.922236495 +0000
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@@ -1780,6 +1780,7 @@ finish:
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if (reexecute) {
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const char **args;
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unsigned i, args_size;
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+ sigset_t ss, o_ss;
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/* Close and disarm the watchdog, so that the new
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* instance can reinitialize it, but doesn't get
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@@ -1863,6 +1864,11 @@ finish:
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args[i++] = NULL;
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assert(i <= args_size);
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+ /* reenable any blocked signals, especially important
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+ * if we switch from initial ramdisk to init=... */
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+ sigemptyset(&ss);
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+ sigprocmask(SIG_SETMASK,&ss,&o_ss);
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+
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if (switch_root_init) {
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args[0] = switch_root_init;
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execv(args[0], (char* const*) args);
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@@ -1881,6 +1887,9 @@ finish:
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log_error("Failed to execute /bin/sh, giving up: %m");
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} else
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log_warning("Failed to execute /sbin/init, giving up: %m");
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+
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+ /* back to saved state if reexec failed */
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+ sigprocmask(SIG_SETMASK,&o_ss,NULL);
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}
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if (arg_serialization) {
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