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| author |   George Anzinger <george@mvista.com> | 2006-01-08 01:02:48 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-08 20:13:53 -0800 |
| commit | 71fabd5e4835309b4feca6209122ce56c595c461 (patch) | |
| tree | 7d9467a4f9678d2271f82d48ec075a316cb1523f /include/linux/signal.h | |
| parent | [PATCH] keys: Permit running process to instantiate keys (diff) | |
| download | linux-dev-71fabd5e4835309b4feca6209122ce56c595c461.tar.xz linux-dev-71fabd5e4835309b4feca6209122ce56c595c461.zip | |
[PATCH] sigaction should clear all signals on SIG_IGN, not just < 32
While rooting aroung in the signal code trying to understand how to fix the
SIG_IGN ploy (set sig handler to SIG_IGN and flood system with high speed
repeating timers) I came across what, I think, is a problem in sigaction()
in that when processing a SIG_IGN request it flushes signals from 1 to
SIGRTMIN and leaves the rest. Attempt to fix this.
Signed-off-by: George Anzinger <george@mvista.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/signal.h')
| -rw-r--r-- | include/linux/signal.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/signal.h b/include/linux/signal.h index ea9eff16c4b7..b7d093520bb6 100644 --- a/include/linux/signal.h +++ b/include/linux/signal.h @@ -94,6 +94,23 @@ static inline int sigfindinword(unsigned long word) #endif /* __HAVE_ARCH_SIG_BITOPS */ +static inline int sigisemptyset(sigset_t *set) +{ + extern void _NSIG_WORDS_is_unsupported_size(void); + switch (_NSIG_WORDS) { + case 4: + return (set->sig[3] | set->sig[2] | + set->sig[1] | set->sig[0]) == 0; + case 2: + return (set->sig[1] | set->sig[0]) == 0; + case 1: + return set->sig[0] == 0; + default: + _NSIG_WORDS_is_unsupported_size(); + return 0; + } +} + #define sigmask(sig) (1UL << ((sig) - 1)) #ifndef __HAVE_ARCH_SIG_SETOPS |