diff options
| author | Lucas De Marchi <lucas.demarchi@profusion.mobi> | 2011-11-02 13:39:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-02 16:07:02 -0700 |
| commit | f1ecf06854a66ee663f4d4cf029c78cd62a15e04 (patch) | |
| tree | cbe863057fa14b9390746db6d2b1812a2f874b48 /kernel/sys.c | |
| parent | 088024b1deee206cd37eff980138e918837aabdb (diff) | |
| download | linux-f1ecf06854a66ee663f4d4cf029c78cd62a15e04.tar.gz linux-f1ecf06854a66ee663f4d4cf029c78cd62a15e04.tar.bz2 linux-f1ecf06854a66ee663f4d4cf029c78cd62a15e04.zip | |
sysctl: add support for poll()
Adding support for poll() in sysctl fs allows userspace to receive
notifications of changes in sysctl entries. This adds a infrastructure to
allow files in sysctl fs to be pollable and implements it for hostname and
domainname.
[akpm@linux-foundation.org: s/declare/define/ for definitions]
Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Cc: Greg KH <gregkh@suse.de>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/sys.c')
| -rw-r--r-- | kernel/sys.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index 58459509b14c..d06c091e0345 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -1286,6 +1286,7 @@ SYSCALL_DEFINE2(sethostname, char __user *, name, int, len) memset(u->nodename + len, 0, sizeof(u->nodename) - len); errno = 0; } + uts_proc_notify(UTS_PROC_HOSTNAME); up_write(&uts_sem); return errno; } @@ -1336,6 +1337,7 @@ SYSCALL_DEFINE2(setdomainname, char __user *, name, int, len) memset(u->domainname + len, 0, sizeof(u->domainname) - len); errno = 0; } + uts_proc_notify(UTS_PROC_DOMAINNAME); up_write(&uts_sem); return errno; } |