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If permitted protect the supervisor against pageout kill.

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Suggested by:	Andrey Zonov <andrey zonov org>
MFC after:	2 weeks
This commit is contained in:
trociny 2012-02-19 10:38:55 +00:00
parent 7e6fe25ca5
commit faf7be49ae
1 changed files with 7 additions and 0 deletions
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7
usr.sbin/daemon/daemon.c
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@ -32,6 +32,7 @@
__FBSDID("$FreeBSD$"); __FBSDID("$FreeBSD$");
#include <sys/param.h> #include <sys/param.h>
#include <sys/mman.h>
#include <sys/wait.h> #include <sys/wait.h>
#include <err.h> #include <err.h>
@ -138,6 +139,12 @@ main(int argc, char *argv[])
sigaddset(&mask, SIGCHLD); sigaddset(&mask, SIGCHLD);
if (sigprocmask(SIG_SETMASK, &mask, &oldmask) == -1) if (sigprocmask(SIG_SETMASK, &mask, &oldmask) == -1)
err(1, "sigprocmask"); err(1, "sigprocmask");
/*
* Try to protect against pageout kill. Ignore the
* error, madvise(2) will fail only if a process does
* not have superuser privileges.
*/
(void)madvise(NULL, 0, MADV_PROTECT);
restart: restart:
/* /*
* Spawn a child to exec the command, so in the parent * Spawn a child to exec the command, so in the parent