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.
54 lines
1.0 KiB
C
54 lines
1.0 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 action(int sig, siginfo_t *info, void *context) {
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assert (sig == SIGUSR1);
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(void)info;
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(void)context;
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char *msg = "Signal handler\n";
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write(1, msg, strlen(msg));
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_exit(0);
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}
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int main(void) {
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int status;
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struct sigaction act;
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act.sa_sigaction = action;
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act.sa_flags = SA_RESTART;
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sigemptyset(&act.sa_mask);
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status = sigaction(SIGUSR1, &act, NULL);
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ERROR_IF(sigaction, status, == -1);
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int fds[2];
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status = pipe(fds);
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ERROR_IF(pipe, status, == -1);
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int parent = getpid();
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status = fork();
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ERROR_IF(fork, status, == -1);
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if (status == 0) {
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for (int i = 0; i < 1000; i++) {
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status = kill(parent, SIGUSR1);
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ERROR_IF(kill, status, == -1);
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}
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return 0;
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}
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char buffer[1];
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status = read(fds[0], buffer, 1);
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ERROR_IF(read, status, == -1);
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return 1;
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}
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