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.
84 lines
1.5 KiB
C
84 lines
1.5 KiB
C
#include <fcntl.h>
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#include <stdio.h>
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#include <sys/select.h>
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#include <unistd.h>
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#include "test_helpers.h"
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int file_test(void) {
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int fd = open("select.c", 0, 0);
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if (fd < 0) {
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perror("open");
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return -1;
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}
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printf("Testing select on file\n");
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fd_set read;
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FD_ZERO(&read);
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FD_SET(fd, &read);
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printf("Is set before? %d\n", FD_ISSET(fd, &read));
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int nfds = select(fd + 1, &read, NULL, NULL, NULL);
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if (nfds < 0) {
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perror("select");
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return 1;
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}
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printf("Amount of things ready: %d\n", nfds);
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printf("Is set after? %d\n", FD_ISSET(fd, &read));
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close(fd);
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return 0;
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}
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int pipe_test(void) {
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int pipefd[2];
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if (pipe2(pipefd, O_NONBLOCK) < 0) {
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perror("pipe");
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return 1;
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}
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char c = 'c';
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if (write(pipefd[1], &c, sizeof(c)) < 0) {
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perror("write");
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return 1;
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}
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printf("Testing select on pipe\n");
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fd_set read;
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FD_ZERO(&read);
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FD_SET(pipefd[0], &read);
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printf("Is set before? %d\n", FD_ISSET(pipefd[0], &read));
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int nfds = select(pipefd[0] + 1, &read, NULL, NULL, NULL);
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if (nfds < 0) {
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perror("select");
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return 1;
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}
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printf("Amount of things ready: %d\n", nfds);
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printf("Is set after? %d\n", FD_ISSET(pipefd[0], &read));
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close(pipefd[0]);
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close(pipefd[1]);
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return 0;
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}
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int main(void) {
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if (file_test()) {
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return 1;
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}
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if (pipe_test()) {
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return 1;
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}
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return 0;
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}
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