diff options
Diffstat (limited to 'source3/aclocal.m4')
-rw-r--r-- | source3/aclocal.m4 | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/source3/aclocal.m4 b/source3/aclocal.m4 index af7ed7b406..1f2120c68b 100644 --- a/source3/aclocal.m4 +++ b/source3/aclocal.m4 @@ -981,3 +981,97 @@ clockid_t clk = $1; AC_MSG_RESULT(no) ]) ]) + +dnl SMB_IF_RTSIGNAL_BUG([actions if true], +dnl [actions if false], +dnl [actions if cross compiling]) +dnl Test whether we can call sigaction with RT_SIGNAL_NOTIFY and +dnl RT_SIGNAL_LEASE (also RT_SIGNAL_AIO for good measure, though +dnl I don't believe that triggers any bug. +dnl +dnl See the samba-technical thread titled "Failed to setup +dnl RT_SIGNAL_NOTIFY handler" for details on the bug in question. +AC_DEFUN([SMB_IF_RTSIGNAL_BUG], +[ + rt_signal_notify_works=yes + rt_signal_lease_works=yes + rt_signal_aio_works=yes + + AC_MSG_CHECKING(if sigaction works with realtime signals) + AC_TRY_RUN( + [ +#include <sys/types.h> +#include <fcntl.h> +#include <signal.h> + +/* from smbd/notify_kernel.c */ +#ifndef RT_SIGNAL_NOTIFY +#define RT_SIGNAL_NOTIFY (SIGRTMIN+2) +#endif + +/* from smbd/aio.c */ +#ifndef RT_SIGNAL_AIO +#define RT_SIGNAL_AIO (SIGRTMIN+3) +#endif + +/* from smbd/oplock_linux.c */ +#ifndef RT_SIGNAL_LEASE +#define RT_SIGNAL_LEASE (SIGRTMIN+1) +#endif + +static void signal_handler(int sig, siginfo_t *info, void *unused) +{ + int do_nothing = 0; +} + +int main(void) +{ + int result = 0; + struct sigaction act = {0}; + + act.sa_sigaction = signal_handler; + act.sa_flags = SA_SIGINFO; + sigemptyset( &act.sa_mask ); + + if (sigaction(RT_SIGNAL_LEASE, &act, 0) != 0) { + /* Failed to setup RT_SIGNAL_LEASE handler */ + result += 1; + } + + if (sigaction(RT_SIGNAL_NOTIFY, &act, 0) != 0) { + /* Failed to setup RT_SIGNAL_NOTIFY handler */ + result += 10; + } + + if (sigaction(RT_SIGNAL_AIO, &act, 0) != 0) { + /* Failed to setup RT_SIGNAL_AIO handler */ + result += 100; + } + + /* zero on success */ + return result; +} + ], + [ + AC_MSG_RESULT(yes) + $2 + ], + [ + AC_MSG_RESULT(no) + case "$ac_status" in + 1|11|101|111) rt_signal_lease_ok=no ;; + esac + case "$ac_status" in + 10|11|110|111) rt_signal_notify_ok=no ;; + esac + case "$ac_status" in + 100|110|101|111) rt_signal_aio_ok=no ;; + esac + $2 + ], + [ + AC_MSG_RESULT(cross) + $3 + ]) +]) + |