int
main()
{
long pagesize = sysconf(_SC_PAGESIZE);
CHECK_NE(-1, pagesize);
const struct sigaction sa = {
.sa_sigaction = sigsegv,
.sa_flags = SA_SIGINFO,
};
CHECK_EQ(0, sigaction(SIGSEGV, &sa, NULL));
CHECK_EQ(0, sigaction(SIGBUS, &sa, NULL));
volatile char *p = mmap(NULL, pagesize, PROT_READ,
MAP_PRIVATE|MAP_ANON, -1, 0);
CHECK_NE(MAP_FAILED, p);
if (sigsetjmp(env, 1) == 0) {
p[0] = 1;
FAIL();
}
checksig(SIGSEGV, SEGV_ACCERR, p);
CHECK_EQ(0, mprotect((void *)p, pagesize, PROT_NONE));
if (sigsetjmp(env, 1) == 0) {
(void)p[1];
FAIL();
}
checksig(SIGSEGV, SEGV_ACCERR, p + 1);
CHECK_EQ(0, munmap((void *)p, pagesize));
if (sigsetjmp(env, 1) == 0) {
(void)p[2];
FAIL();
}
checksig(SIGSEGV, SEGV_MAPERR, p + 2);
char filename[] = "/tmp/siginfo-fault.XXXXXXXX";
int fd = mkstemp(filename);
CHECK_GE(fd, 0);
CHECK_EQ(0, unlink(filename));
CHECK_EQ(0, ftruncate(fd, 0)); /* just in case */
p = mmap(NULL, pagesize, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
CHECK_NE(MAP_FAILED, p);
CHECK_EQ(0, close(fd));
if (sigsetjmp(env, 1) == 0) {
p[3] = 1;
FAIL();
}
checksig(SIGBUS, BUS_ADRERR, p + 3);
return (0);
}
int
downloadchecksig(struct repoinfo *cinfo, FILE *fp, const char *sigurl, Pool **sigpool)
{
FILE *sigfp;
sigfp = curlfopen(cinfo, sigurl, 0, 0, 0, 0);
if (!sigfp)
{
printf(" unsigned, skipped\n");
return 0;
}
if (!*sigpool)
*sigpool = read_sigs();
if (!checksig(*sigpool, fp, sigfp))
{
printf(" checksig failed, skipped\n");
fclose(sigfp);
return 0;
}
fclose(sigfp);
return 1;
}