1 /* Test program that invokes the Linux system call rt_sigqueueinfo(). */ 2 3 #include <signal.h> 4 #include <string.h> 5 #include <stddef.h> 6 #include <stdlib.h> 7 #include <stdio.h> 8 #include <syscall.h> 9 #include <unistd.h> 10 11 int main(int argc, char **argv) 12 { 13 siginfo_t *si; 14 const size_t sz = sizeof(*si); 15 16 if (argc == 1) { 17 fprintf(stderr, "sizeof(*si) = %zu\n", sz); 18 fprintf(stdout, "offsetof(siginfo_t, si_signo) = %zd\n", 19 offsetof(siginfo_t, si_signo)); 20 fprintf(stdout, "offsetof(siginfo_t, si_errno) = %zd\n", 21 offsetof(siginfo_t, si_errno)); 22 fprintf(stdout, "offsetof(siginfo_t, si_code) = %zd\n", 23 offsetof(siginfo_t, si_code)); 24 fprintf(stdout, "offsetof(siginfo_t, _sifields) = %zd\n", 25 offsetof(siginfo_t, _sifields)); 26 } 27 si = calloc(1, sz); 28 si->si_signo = SIGWINCH; 29 si->si_code = SI_QUEUE; 30 si->si_pid = getpid(); 31 si->si_uid = getuid(); 32 syscall(__NR_rt_sigqueueinfo, getpid(), SIGWINCH, si); 33 free(si); 34 fprintf(stderr, "Done.\n"); 35 return 0; 36 } 37
