static char *
get_mdadm_uuid (const char *os_dev)
{
const char *argv[5];
int fd;
pid_t pid;
FILE *mdadm;
char *buf = NULL;
size_t len = 0;
char *name = NULL;
argv[0] = "mdadm";
argv[1] = "--detail";
argv[2] = "--export";
argv[3] = os_dev;
argv[4] = NULL;
pid = grub_util_exec_pipe (argv, &fd);
if (!pid)
return NULL;
/* Parent. Read mdadm's output. */
mdadm = fdopen (fd, "r");
if (! mdadm)
{
grub_util_warn (_("Unable to open stream from %s: %s"),
"mdadm", strerror (errno));
goto out;
}
while (getline (&buf, &len, mdadm) > 0)
{
if (strncmp (buf, "MD_UUID=", sizeof ("MD_UUID=") - 1) == 0)
{
char *name_start, *ptri, *ptro;
free (name);
name_start = buf + sizeof ("MD_UUID=") - 1;
ptro = name = xmalloc (strlen (name_start) + 1);
for (ptri = name_start; *ptri && *ptri != '\n' && *ptri != '\r';
ptri++)
if ((*ptri >= '0' && *ptri <= '9')
|| (*ptri >= 'a' && *ptri <= 'f')
|| (*ptri >= 'A' && *ptri <= 'F'))
*ptro++ = *ptri;
*ptro = 0;
}
}
out:
close (fd);
waitpid (pid, NULL, 0);
free (buf);
return name;
}
void
grub_util_pull_lvm_by_command (const char *os_dev)
{
const char *argv[8];
int fd;
pid_t pid;
FILE *vgs;
char *buf = NULL;
size_t len = 0;
char *vgname = NULL;
const char *iptr;
char *optr;
char *vgid = NULL;
grub_size_t vgidlen = 0;
vgid = grub_util_get_vg_uuid (os_dev);
if (vgid)
vgidlen = grub_strlen (vgid);
if (!vgid)
{
if (strncmp (os_dev, LVM_DEV_MAPPER_STRING,
sizeof (LVM_DEV_MAPPER_STRING) - 1)
!= 0)
return;
vgname = xmalloc (strlen (os_dev + sizeof (LVM_DEV_MAPPER_STRING) - 1) + 1);
for (iptr = os_dev + sizeof (LVM_DEV_MAPPER_STRING) - 1, optr = vgname; *iptr; )
if (*iptr != '-')
*optr++ = *iptr++;
else if (iptr[0] == '-' && iptr[1] == '-')
{
iptr += 2;
*optr++ = '-';
}
else
break;
*optr = '\0';
}
/* by default PV name is left aligned in 10 character field, meaning that
we do not know where name ends. Using dummy --separator disables
alignment. We have a single field, so separator itself is not output */
argv[0] = "vgs";
argv[1] = "--options";
if (vgid)
argv[2] = "vg_uuid,pv_name";
else
argv[2] = "pv_name";
argv[3] = "--noheadings";
argv[4] = "--separator";
argv[5] = ":";
argv[6] = vgname;
argv[7] = NULL;
pid = grub_util_exec_pipe (argv, &fd);
free (vgname);
if (!pid)
return;
/* Parent. Read vgs' output. */
vgs = fdopen (fd, "r");
if (! vgs)
{
grub_util_warn (_("Unable to open stream from %s: %s"),
"vgs", strerror (errno));
goto out;
}
while (getline (&buf, &len, vgs) > 0)
{
char *ptr;
/* LVM adds two spaces as standard prefix */
for (ptr = buf; ptr < buf + 2 && *ptr == ' '; ptr++);
if (vgid && (grub_strncmp (vgid, ptr, vgidlen) != 0
|| ptr[vgidlen] != ':'))
continue;
if (vgid)
ptr += vgidlen + 1;
if (*ptr == '\0')
continue;
*(ptr + strlen (ptr) - 1) = '\0';
grub_util_pull_device (ptr);
}
out:
close (fd);
waitpid (pid, NULL, 0);
free (buf);
}
static int
grub_util_is_imsm (const char *os_dev)
{
int retry;
int is_imsm = 0;
int container_seen = 0;
const char *dev = os_dev;
do
{
const char *argv[5];
int fd;
pid_t pid;
FILE *mdadm;
char *buf = NULL;
size_t len = 0;
retry = 0; /* We'll do one more pass if device is part of container */
argv[0] = "mdadm";
argv[1] = "--detail";
argv[2] = "--export";
argv[3] = dev;
argv[4] = NULL;
pid = grub_util_exec_pipe (argv, &fd);
if (!pid)
{
if (dev != os_dev)
free ((void *) dev);
return 0;
}
/* Parent. Read mdadm's output. */
mdadm = fdopen (fd, "r");
if (! mdadm)
{
grub_util_warn (_("Unable to open stream from %s: %s"),
"mdadm", strerror (errno));
close (fd);
waitpid (pid, NULL, 0);
if (dev != os_dev)
free ((void *) dev);
return 0;
}
while (getline (&buf, &len, mdadm) > 0)
{
if (strncmp (buf, "MD_CONTAINER=", sizeof ("MD_CONTAINER=") - 1) == 0
&& !container_seen)
{
char *newdev, *ptr;
newdev = xstrdup (buf + sizeof ("MD_CONTAINER=") - 1);
ptr = newdev + strlen (newdev) - 1;
for (; ptr >= newdev && (*ptr == '\n' || *ptr == '\r'); ptr--);
ptr[1] = 0;
grub_util_info ("Container of %s is %s", dev, newdev);
dev = newdev;
container_seen = retry = 1;
break;
}
if (strncmp (buf, "MD_METADATA=imsm",
sizeof ("MD_METADATA=imsm") - 1) == 0)
{
is_imsm = 1;
grub_util_info ("%s is imsm", dev);
break;
}
}
free (buf);
close (fd);
waitpid (pid, NULL, 0);
}
while (retry);
if (dev != os_dev)
free ((void *) dev);
return is_imsm;
}
