vasilito
b9874d0941
Add redbear-usb-storage-check in-guest binary that validates USB mass storage read and write I/O: discovers /scheme/disk/ devices, writes a test pattern to sector 2048, reads it back, verifies match, restores original content. Updates test-usb-storage-qemu.sh with write-proof verification step. Includes all accumulated Red Bear OS work: kernel patches, relibc patches, driver infrastructure, DRM/GPU, KDE recipes, firmware, validation tooling, build system hardening, and documentation.
109 lines
2.2 KiB
C
109 lines
2.2 KiB
C
#include <assert.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <signal.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include "signals_list.h"
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#include "../test_helpers.h"
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// This program verifies that sigpause() restores sig to the signal mask before
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// returning.
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volatile sig_atomic_t handler_called = false;
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void handler() {
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handler_called = true;
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return;
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}
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void *c_thread_func(void *sig)
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{
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int signum = *(int *)sig;
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printf("%d !!!\n", signum);
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sigset_t pendingset;
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puts("before sigpause");
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assert(!handler_called);
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if ((sigpause(signum) != -1) || (errno != EINTR)) {
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puts("Test UNRESOLVED: sigpause didn't return -1 and/or didn't set errno correctly.");
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exit(2);
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return NULL;
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}
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assert(handler_called);
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handler_called = false;
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int status = raise(signum);
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ERROR_IF(raise, status, == -1);
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assert(!handler_called);
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sigpending(&pendingset);
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if (sigismember(&pendingset, signum) == 1) {
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puts("Test PASSED: signal mask was restored when sigpause returned.");
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}
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return NULL;
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}
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int sigpause_revert(int signum) {
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pthread_t new_th;
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int status;
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struct sigaction act;
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// Ensure thread inherits mask with signum blocked.
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status = sighold(signum);
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ERROR_IF(sighold, status, == -1);
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act.sa_flags = 0;
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act.sa_handler = handler;
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status = sigemptyset(&act.sa_mask);
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ERROR_IF(sigemptyset, status, == -1);
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status = sigaction(signum, &act, NULL);
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ERROR_IF(sigaction, status, == -1);
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if((status = pthread_create(&new_th, NULL, c_thread_func, (void *)&signum)) != 0)
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{
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errno = status;
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perror("Error creating thread");
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exit(EXIT_FAILURE);
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}
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usleep(100000);
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if((status = pthread_kill(new_th, signum)) != 0)
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{
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errno = status;
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perror("Test UNRESOLVED: Couldn't send signal to thread");
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exit(EXIT_FAILURE);
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}
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if ((status = pthread_join(new_th, NULL)) != 0) {
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errno = status;
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perror("failed to join thread");
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return EXIT_FAILURE;
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}
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puts("Test PASSED");
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return EXIT_SUCCESS;
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}
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int main(){
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for (int i=1; i<N_SIGNALS; i++){
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if (i == SIGKILL || i == SIGSTOP){
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continue;
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}
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printf("Testing signal %s\n", strsignal(i));
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sigpause_revert(i);
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}
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return EXIT_SUCCESS;
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}
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