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/*
* Test the lowest and the highest real-time signals.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <assert.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/* For hexagon and microblaze. */
#ifndef __SIGRTMIN
#define __SIGRTMIN 32
#endif
extern char **environ;
static bool seen_sigrtmin, seen_sigrtmax;
static void handle_signal(int sig)
{
if (sig == SIGRTMIN) {
seen_sigrtmin = true;
} else if (sig == SIGRTMAX) {
seen_sigrtmax = true;
} else {
_exit(1);
}
}
int main(int argc, char **argv)
{
char *qemu = getenv("QEMU");
struct sigaction act;
assert(qemu);
if (!getenv("QEMU_RTSIG_MAP")) {
char **new_argv = malloc((argc + 2) + sizeof(char *));
int tsig1, hsig1, count1, tsig2, hsig2, count2;
char rt_sigmap[64];
/* Re-exec with a mapping that includes SIGRTMIN and SIGRTMAX. */
new_argv[0] = qemu;
memcpy(&new_argv[1], argv, (argc + 1) * sizeof(char *));
tsig1 = __SIGRTMIN;
/* The host must have a few signals starting from this one. */
hsig1 = 36;
count1 = SIGRTMIN - __SIGRTMIN + 1;
tsig2 = SIGRTMAX;
hsig2 = hsig1 + count1;
count2 = 1;
snprintf(rt_sigmap, sizeof(rt_sigmap), "%d %d %d,%d %d %d",
tsig1, hsig1, count1, tsig2, hsig2, count2);
setenv("QEMU_RTSIG_MAP", rt_sigmap, 0);
assert(execve(new_argv[0], new_argv, environ) == 0);
return EXIT_FAILURE;
}
memset(&act, 0, sizeof(act));
act.sa_handler = handle_signal;
assert(sigaction(SIGRTMIN, &act, NULL) == 0);
assert(sigaction(SIGRTMAX, &act, NULL) == 0);
assert(kill(getpid(), SIGRTMIN) == 0);
assert(seen_sigrtmin);
assert(kill(getpid(), SIGRTMAX) == 0);
assert(seen_sigrtmax);
return EXIT_SUCCESS;
}
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