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stress2: Added an option to set the file size. Added missing error checks

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This commit is contained in:
Peter Holm 2021-11-25 12:44:59 +01:00
parent b74fdaaf1c
commit 171e56c19a
1 changed files with 17 additions and 7 deletions
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24
tools/test/stress2/tools/flip.c
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@ -54,7 +54,7 @@ flip(void *ap, size_t len)
{
unsigned char *cp;
int byte;
unsigned char bit, buf, mask, old;
unsigned char bit, buf, mask, old __unused;
cp = (unsigned char *)ap;
byte = random_long(0, len);
@ -75,15 +75,20 @@ main(int argc, char *argv[])
{
struct stat st;
off_t pos;
size_t size;
int fd, i, times;
char c;
times = 1;
while ((c = getopt(argc, argv, "n:")) != -1) {
size = 0;
while ((c = getopt(argc, argv, "n:s:")) != -1) {
switch (c) {
case 'n':
times = atoi(optarg);
break;
case 's':
size = atol(optarg);
break;
case '?':
default:
fprintf(stderr,
@ -103,18 +108,23 @@ main(int argc, char *argv[])
if ((fd = open(argv[0], O_RDWR)) == -1)
err(1, "open(%s)", argv[0]);
if (fstat(fd, &st) == -1)
err(1, "stat %s", argv[0]);
if (size == 0) {
if (fstat(fd, &st) == -1)
err(1, "stat %s", argv[0]);
size = st.st_size;
}
for (i = 0; i < times; i++) {
pos = arc4random() % st.st_size;
pos = arc4random() % size;
if (lseek(fd, pos, SEEK_SET) == -1)
err(1, "lseek()");
read(fd, &c, 1);
if (read(fd, &c, 1) != 1)
err(1, "read()");
flip(&c, 1);
if (lseek(fd, pos, SEEK_SET) == -1)
err(1, "lseek()");
write(fd, &c, 1);
if (write(fd, &c, 1) != 1)
err(1, "write()");
}
return (0);