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
1.8 KiB
C
71 lines
1.8 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include "test_helpers.h"
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int main(void) {
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// Uninitialized generator
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int rand_uninit = rand();
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printf("%d\n", rand_uninit);
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// Testing the reproducibility of values
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srand(259);
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int rand_seed259_1 = rand();
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printf("%d\n", rand_seed259_1);
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srand(259);
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int rand_seed259_2 = rand();
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printf("%d\n", rand_seed259_2);
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if (rand_seed259_1 != rand_seed259_2) {
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puts("rand() doesn't return reproducible values");
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exit(EXIT_FAILURE);
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}
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// Seed value 1 should return the same values as the ininitialized generator
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srand(1);
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int rand_seed1 = rand();
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printf("%d\n", rand_seed1);
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if (rand_uninit != rand_seed1) {
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puts("srand(1) doesn't work");
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exit(EXIT_FAILURE);
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}
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// Ensure rand_r() fails with NULL input
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if (rand_r(NULL) != EINVAL) {
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puts("rand_r(NULL) doesn't return EINVAL");
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exit(EXIT_FAILURE);
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}
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// Ensure rand_r() produces unique values
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int seed = 259;
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int rand_r_seed259_1 = rand_r((unsigned *)&seed);
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printf("%d\n", rand_r_seed259_1);
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int rand_r_seed259_2 = rand_r((unsigned *)&seed);
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printf("%d\n", rand_r_seed259_2);
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if (rand_r_seed259_1 == rand_r_seed259_2) {
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puts("rand_r() fails to produce unique values");
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exit(EXIT_FAILURE);
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}
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// Ensure rand_r() returns reproducible values
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seed = 259;
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int rand_r_seed259_1_2 = rand_r((unsigned *)&seed);
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printf("%d\n", rand_r_seed259_1_2);
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int rand_r_seed259_2_2 = rand_r((unsigned *)&seed);
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printf("%d\n", rand_r_seed259_2_2);
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if (rand_r_seed259_1 != rand_r_seed259_1_2
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|| rand_r_seed259_2 != rand_r_seed259_2_2)
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{
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puts("rand_r() is not reproducible");
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exit(EXIT_FAILURE);
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}
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return 0;
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}
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