#define T1 "write data before unlink\n"
#define T2 "write data after unlink\n"
-char buf[128];
+char buf[] = "yabba dabba doo, I'm coming for you, I live in a shoe, I don't know what to do.\n'Bigger, bigger,and bigger yet!' cried the Creator. 'You are not yet substantial enough for my boundless intents!' And ever greater and greater the object became, until all was lost 'neath its momentus bulk.\n";
char usage[] =
"Usage: %s filename command-sequence\n"
" c close\n"
" _ wait for signal\n"
" R reference entire mmap-ed region\n"
-" r read\n"
+" r[num] read [optional length]\n"
" s stat\n"
" S fstat\n"
" t fchmod\n"
-" T ftruncate to zero\n"
-" w write\n"
+" T[num] ftruncate [optional position, default 0]\n"
+" w[num] write optional length\n"
" W write entire mmap-ed region\n"
" y fsync\n"
" Y fdatasync\n"
-" z seek to zero\n";
+" z[num] seek [optional position, default 0]\n";
-void null_handler(int unused) { }
+static int usr1_received;
+void usr1_handler(int unused)
+{
+ usr1_received = 1;
+}
static const char *
pop_arg(int argc, char *argv[])
return argv[cur_arg++];
}
#define POP_ARG() (pop_arg(argc, argv))
+#define min(a,b) ((a)>(b)?(b):(a))
int main(int argc, char **argv)
{
struct stat st;
size_t mmap_len = 0, i;
unsigned char *mmap_ptr = NULL, junk = 0;
- int fd = -1;
+ int rc, len, fd = -1;
if (argc < 3) {
fprintf(stderr, usage, argv[0]);
exit(1);
}
- signal(SIGUSR1, null_handler);
+ signal(SIGUSR1, usr1_handler);
fname = argv[1];
for (commands = argv[2]; *commands; commands++) {
switch (*commands) {
case '_':
- pause();
+ if (usr1_received == 0)
+ pause();
+ usr1_received = 0;
+ signal(SIGUSR1, usr1_handler);
break;
case 'c':
if (close(fd) == -1) {
}
break;
case 'D':
- if (open(fname, O_DIRECTORY) == -1) {
+ fd = open(fname, O_DIRECTORY);
+ if (fd == -1) {
perror("open(O_DIRECTORY)");
exit(1);
}
exit(1);
}
break;
- case 'r': {
- char buf;
- if (read(fd, &buf, 1) == -1) {
- perror("read");
- exit(1);
- }
+ case 'r':
+ len = atoi(commands+1);
+ if (len <= 0)
+ len = 1;
+ while(len > 0) {
+ if (read(fd, &buf,
+ min(len,sizeof(buf))) == -1) {
+ perror("read");
+ exit(1);
+ }
+ len -= sizeof(buf);
}
+ break;
case 'S':
if (fstat(fd, &st) == -1) {
perror("fstat");
}
break;
case 'T':
- if (ftruncate(fd, 0) == -1) {
+ len = atoi(commands+1);
+ if (ftruncate(fd, len) == -1) {
+ printf("ftruncate (%d,%d)\n", fd, len);
perror("ftruncate");
exit(1);
}
exit(1);
}
break;
- case 'w': {
- int rc;
- if ((rc = write(fd, "w", 1)) == -1) {
- perror("write");
- exit(1);
- }
- /* b=3043 write() on Suse x86-64 is returning -errno
- instead of -1, and not setting errno. */
- if (rc < 0) {
- fprintf(stderr, "MULTIOP: broken write() "
- "returned %d, errno %d\n",
- rc, errno);
- exit(1);
+ case 'w':
+ len = atoi(commands+1);
+ if (len <= 0)
+ len = 1;
+ while(len > 0) {
+ if ((rc = write(fd, buf,
+ min(len, sizeof(buf))))
+ == -1) {
+ perror("write");
+ exit(1);
+ }
+ len -= sizeof(buf);
}
break;
- }
case 'W':
for (i = 0; i < mmap_len && mmap_ptr; i += 4096)
mmap_ptr[i] += junk++;
exit(1);
}
case 'z':
- if (lseek(fd, 0, SEEK_SET) == -1) {
+ len = atoi(commands+1);
+ if (lseek(fd, len, SEEK_SET) == -1) {
perror("lseek");
exit(1);
}
break;
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ break;
default:
fprintf(stderr, "unknown command \"%c\"\n", *commands);
fprintf(stderr, usage, argv[0]);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff