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.
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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// The value of the argument how is not significant and the process's signal mask shall be unchanged, and
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// thus the call can be used to enquire about currently blocked signals, if the argument set is a null
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// pointer.
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#define NUMSIGNALS 25
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int is_changed(sigset_t set, int sig) {
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int i;
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int siglist[] = {SIGABRT, SIGALRM, SIGBUS, SIGCHLD,
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SIGCONT, SIGFPE, SIGHUP, SIGILL, SIGINT,
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SIGPIPE, SIGQUIT, SIGSEGV,
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SIGTERM, SIGTSTP, SIGTTIN, SIGTTOU,
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SIGUSR1, SIGUSR2, SIGPROF, SIGSYS,
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SIGTRAP, SIGURG, SIGVTALRM, SIGXCPU, SIGXFSZ };
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if (sigismember(&set, sig) != 1) {
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return 1;
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}
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for (i=0; i<NUMSIGNALS; i++) {
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if ((siglist[i] != sig)) {
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if (sigismember(&set, siglist[i]) != 0) {
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return 1;
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}
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}
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}
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return 0;
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}
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int main() {
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sigset_t actl, oactl;
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sigemptyset(&actl);
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sigemptyset(&oactl);
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sigaddset(&actl, SIGABRT);
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sigprocmask(SIG_SETMASK, &actl, NULL);
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sigprocmask(SIG_BLOCK, NULL, &oactl);
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if (is_changed(oactl, SIGABRT)) {
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exit(EXIT_FAILURE);
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}
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return EXIT_SUCCESS;
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} |