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stress2: Occasionally modify 8 bits

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This commit is contained in:
Peter Holm 2023-05-22 10:05:34 +02:00
parent 046d8d89ed
commit ca0088ae27
1 changed files with 13 additions and 1 deletions
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14
tools/test/stress2/tools/flip.c
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@ -70,6 +70,15 @@ flip(void *ap, size_t len)
#endif
}
static void
trash(char *c)
{
if (arc4random() % 2 == 1)
*c = 0;
else
arc4random_buf(c, sizeof(c));
}
int
main(int argc, char *argv[])
{
@ -122,7 +131,10 @@ main(int argc, char *argv[])
err(1, "lseek()");
if (read(fd, &c, 1) != 1)
err(1, "read()");
flip(&c, 1);
if (arc4random() % 100 < 80)
flip(&c, 1);
else
trash(&c);
if (lseek(fd, pos, SEEK_SET) == -1)
err(1, "lseek()");
if (write(fd, &c, 1) != 1)