Linux supports the signals listed below. Several signal
numbers are architecture dependent. First the signals
described in POSIX.1.
Next the signals not in POSIX.1 but described in
(For the cases SIGSYS, SIGXCPU, SIGXFSZ, and on some
architectures also SIGBUS, the Linux default action up to
now (2.3.27) is A (terminate), while SUSv2 prescribes C
(terminate and dump core).)
Next various other signals.
(Here − denotes that a signal is absent; there
where three values are given, the first one is usually valid
for alpha and sparc, the middle one for i386 and ppc and sh,
the last one for mips. Signal 29 is SIGINFO / SIGPWR on an
alpha but SIGLOST on a sparc.)
The letters in the "Action" column have the
Default action is to terminate the process.
Default action is to ignore the signal.
Default action is to terminate the process and dump
Default action is to stop the process.
Signal cannot be caught.
Signal cannot be ignored.
SIGIO and SIGLOST have the same value. The latter is
commented out in the kernel source, but the build process of
some software still thinks that signal 29 is SIGLOST.