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.
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
#include <assert.h>
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#include <signal.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include "test_helpers.h"
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void handler1(int sig) {
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assert(sig == SIGUSR1);
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char *str = "Signal handler1 called!\n";
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write(STDOUT_FILENO, str, strlen(str));
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}
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sigset_t the_set = { 0 };
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void handler2(int sig, siginfo_t *info, void *context_raw) {
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assert(sig == SIGUSR1);
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char *str = "Signal handler2 called!\n";
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write(STDOUT_FILENO, str, strlen(str));
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assert(info != NULL);
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assert(info->si_signo == SIGUSR1);
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#ifndef __linux
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// TODO: SI_TKILL?
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assert(info->si_code == SI_USER);
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assert(info->si_pid == getpid());
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assert(info->si_uid == getuid());
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#endif
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ucontext_t *context = context_raw;
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assert(context != NULL);
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#ifndef __linux__ // TODO
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assert(memcmp(&context->uc_sigmask, &the_set, sizeof(sigset_t)));
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assert(context->uc_link == NULL);
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#endif
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}
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int main(void) {
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struct sigaction sa1 = { .sa_handler = handler1 };
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struct sigaction sa2 = { .sa_sigaction = handler2, .sa_flags = SA_SIGINFO };
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struct sigaction saold = {0};
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sigemptyset(&sa1.sa_mask);
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sigemptyset(&sa2.sa_mask);
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int status = sigprocmask(SIG_SETMASK, NULL, &the_set);
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ERROR_IF(sigprocmask, status, == -1);
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int rcode = sigaction(SIGUSR1, &sa1, NULL);
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ERROR_IF(signal, rcode, != 0);
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puts("Raising...");
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int raise_status = raise(SIGUSR1);
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ERROR_IF(raise, raise_status, < 0);
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rcode = sigaction(SIGUSR1, &sa2, &saold);
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ERROR_IF(signal, rcode, != 0);
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ERROR_IF(signal, saold.sa_handler, != sa1.sa_handler);
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puts("Raising...");
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raise_status = raise(SIGUSR1);
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ERROR_IF(raise, raise_status, < 0);
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puts("Raised.");
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}
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