static int
read_lpj_common (guestfs_h *g, const char *func, struct command *cmd)
{
int r;
CLEANUP_FREE char *buf = NULL;
guestfs___cmd_set_stdout_callback (cmd, read_all, &buf,
CMD_STDOUT_FLAG_WHOLE_BUFFER);
r = guestfs___cmd_run (cmd);
if (r == -1)
return -1;
if (!WIFEXITED (r) || WEXITSTATUS (r) != 0) {
char status_string[80];
debug (g, "%s: %s", func,
guestfs___exit_status_to_string (r, "external command",
status_string,
sizeof status_string));
return -1;
}
if (buf == NULL) {
debug (g, "%s: callback not called", func);
return -1;
}
if (strlen (buf) < 4 || sscanf (&buf[4], "%d", &r) != 1) {
debug (g, "%s: invalid buffer returned by grep: %s", func, buf);
return -1;
}
debug (g, "%s: calculated lpj=%d", func, r);
return r;
}
static int
read_lpj_common (guestfs_h *g, const char *func, struct command *cmd)
{
int r;
char *buf = NULL;
guestfs___cmd_set_stdout_callback (cmd, read_all, &buf,
CMD_STDOUT_FLAG_WHOLE_BUFFER);
r = guestfs___cmd_run (cmd);
guestfs___cmd_close (cmd);
if (r == -1 || !WIFEXITED (r) || WEXITSTATUS (r) != 0) {
debug (g, "%s: external command failed with code %d", func, r);
free (buf);
return -1;
}
if (buf == NULL) {
debug (g, "%s: callback not called", func);
return -1;
}
if (strlen (buf) < 4 || sscanf (&buf[4], "%d", &r) != 1) {
debug (g, "%s: invalid buffer returned by grep: %s", func, buf);
free (buf);
return -1;
}
free (buf);
debug (g, "%s: calculated lpj=%d", func, r);
return r;
}
static int
run_qemu_img_info (guestfs_h *g, const char *filename,
cmd_stdout_callback fn, void *data)
{
char *abs_filename = NULL;
char *safe_filename = NULL;
struct command *cmd;
int r;
if (guestfs___lazy_make_tmpdir (g) == -1)
return -1;
safe_filename = safe_asprintf (g, "%s/format.%d", g->tmpdir, ++g->unique);
/* 'filename' must be an absolute path so we can link to it. */
abs_filename = realpath (filename, NULL);
if (abs_filename == NULL) {
perrorf (g, "realpath");
goto error;
}
if (symlink (abs_filename, safe_filename) == -1) {
perrorf (g, "symlink");
goto error;
}
cmd = guestfs___new_command (g);
guestfs___cmd_add_arg (cmd, "qemu-img");
guestfs___cmd_add_arg (cmd, "info");
guestfs___cmd_add_arg (cmd, safe_filename);
guestfs___cmd_set_stdout_callback (cmd, fn, data, 0);
r = guestfs___cmd_run (cmd);
guestfs___cmd_close (cmd);
if (r == -1)
goto error;
if (!WIFEXITED (r) || WEXITSTATUS (r) != 0) {
error (g, _("qemu-img: %s: child process failed"), filename);
goto error;
}
free (safe_filename);
free (abs_filename);
return 0;
error:
free (safe_filename);
free (abs_filename);
return -1;
}
