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.
101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/statvfs.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <stdio.h>
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#include <time.h>
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#include <unistd.h>
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int check_mtime(char *path, int expected_sec, int expected_nsec, int err_gap) {
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// Checks whether the moditication time of the file located at *path* match the provided times.
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// When err_gap is set, only checks for a match on sec with a margin of error of +/- err_gap.
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struct stat sb;
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if (stat(path, &sb) != 0) {
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fprintf(stderr, "stat: %s\n", strerror(errno));
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return -1;
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}
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if (err_gap > 0) {
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if (sb.st_mtim.tv_sec < expected_sec + err_gap && sb.st_mtim.tv_sec > expected_sec - err_gap) {
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return 0;
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}
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} else {
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if (sb.st_mtim.tv_sec == expected_sec && sb.st_mtim.tv_nsec == expected_nsec) {
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return 0;
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}
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}
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fprintf(stderr, "Wrong modified time: %d.%d\n", sb.st_mtim.tv_sec, sb.st_mtim.tv_nsec);
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return -1;
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}
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int main(void) {
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char temp[] = "/tmp/stattest-XXXXXX";
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const char file[] = "/mkfifo_fifo";
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int len = sizeof(temp) + sizeof(int);
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char* path = calloc(len, sizeof(char));
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if (path == NULL) {
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fprintf(stderr, "Could not allocate: %s\n", strerror(errno));
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exit(1);
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}
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
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strncat(path, mktemp(temp), sizeof(temp));
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#pragma GCC diagnostic pop
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strncat(path, file, sizeof(file));
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if (mkdir(temp, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH) != 0) {
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fprintf(stderr, "mkdir %s: %s\n", temp, strerror(errno));
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exit(1);
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}
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int tmp = open(path, O_CREAT | O_CLOEXEC | O_RDONLY | S_IRWXU | S_IRWXG | S_IRWXO);
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if (tmp == -1) {
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fprintf(stderr, "touch %s: %s\n", path, strerror(errno));
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exit(1);
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}
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if (close(tmp) == -1) {
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fprintf(stderr, "close %s: %s\n", path, strerror(errno));
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exit(1);
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}
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int fd = open(path, 0, 0);
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if (fd == -1) {
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fprintf(stderr, "open %s: %s\n", path, strerror(errno));
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exit(1);
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}
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const struct timespec times[] = { { .tv_sec = 10 }, { .tv_sec = 20 } };
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if (futimens(fd, times) == -1) {
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fprintf(stderr, "futimens: %s\n", strerror(errno));
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exit(1);
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}
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if (check_mtime(path, 20, 0, 0) != 0) {
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exit(1);
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}
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// Access times are not flushed to disk, so atime checks can't be (currently) performed
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const struct timespec omit_times[] = { { 25, UTIME_OMIT }, { 12, UTIME_OMIT } };
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if (futimens(fd, omit_times) == -1) {
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fprintf(stderr, "futimens: %s\n", strerror(errno));
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exit(1);
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}
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if (check_mtime(path, 20, 0, 0) != 0) {
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exit(1);
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}
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const struct timespec now_times[] = { { 25, UTIME_NOW }, { 12, UTIME_NOW } };
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if (futimens(fd, now_times) == -1) {
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fprintf(stderr, "futimens: %s\n", strerror(errno));
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exit(1);
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}
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int now_ts = time(NULL);
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if (check_mtime(path, now_ts, 0, 1) != 0) {
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exit(1);
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}
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}
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