char *
do_part_get_name (const char *device, int partnum)
{
CLEANUP_FREE char *parttype;
parttype = do_part_get_parttype (device);
if (parttype == NULL)
return NULL;
if (STREQ (parttype, "gpt")) {
CLEANUP_FREE char *out = print_partition_table (device, true);
if (!out)
return NULL;
CLEANUP_FREE_STRING_LIST char **lines = split_lines (out);
if (!lines)
return NULL;
if (lines[0] == NULL || STRNEQ (lines[0], "BYT;")) {
reply_with_error ("unknown signature, expected \"BYT;\" as first line of the output: %s",
lines[0] ? lines[0] : "(signature was null)");
return NULL;
}
if (lines[1] == NULL) {
reply_with_error ("parted didn't return a line describing the device");
return NULL;
}
size_t row;
int pnum;
for (row = 2; lines[row] != NULL; ++row) {
if (sscanf (lines[row], "%d:", &pnum) != 1) {
reply_with_error ("could not parse row from output of parted print command: %s", lines[row]);
return NULL;
}
if (pnum == partnum)
break;
}
if (lines[row] == NULL) {
reply_with_error ("partition number %d not found", partnum);
return NULL;
}
char *name = get_table_field (lines[row], 5);
if (name == NULL)
reply_with_error ("cannot get the name field from '%s'", lines[row]);
return name;
} else {
reply_with_error ("part-get-name can only be used on GUID Partition Tables");
return NULL;
}
}
int
do_part_get_bootable (const char *device, int partnum)
{
if (partnum <= 0) {
reply_with_error ("partition number must be >= 1");
return -1;
}
CLEANUP_FREE char *out = print_partition_table (device, true);
if (!out)
return -1;
CLEANUP_FREE_STRING_LIST char **lines = split_lines (out);
if (!lines)
return -1;
/* Partitions may not be in any order, so we have to look for
* the matching partition number (RHBZ#602997).
*/
if (lines[0] == NULL || STRNEQ (lines[0], "BYT;")) {
reply_with_error ("unknown signature, expected \"BYT;\" as first line of the output: %s",
lines[0] ? lines[0] : "(signature was null)");
return -1;
}
if (lines[1] == NULL) {
reply_with_error ("parted didn't return a line describing the device");
return -1;
}
size_t row;
int pnum;
for (row = 2; lines[row] != NULL; ++row) {
if (sscanf (lines[row], "%d:", &pnum) != 1) {
reply_with_error ("could not parse row from output of parted print command: %s", lines[row]);
return -1;
}
if (pnum == partnum)
break;
}
if (lines[row] == NULL) {
reply_with_error ("partition number %d not found", partnum);
return -1;
}
CLEANUP_FREE char *boot = get_table_field (lines[row], 6);
if (boot == NULL)
return -1;
return strstr (boot, "boot") != NULL;
}
int
do_part_get_bootable (const char *device, int partnum)
{
if (partnum <= 0) {
reply_with_error ("partition number must be >= 1");
return -1;
}
int parted_has_m_opt = test_parted_m_opt ();
if (parted_has_m_opt == -1)
return -1;
char *out = print_partition_table (device, parted_has_m_opt);
if (!out)
return -1;
char **lines = split_lines (out);
free (out);
if (!lines)
return -1;
if (parted_has_m_opt) {
/* New-style parsing using the "machine-readable" format from
* 'parted -m'.
*
* Partitions may not be in any order, so we have to look for
* the matching partition number (RHBZ#602997).
*/
if (lines[0] == NULL || STRNEQ (lines[0], "BYT;")) {
reply_with_error ("unknown signature, expected \"BYT;\" as first line of the output: %s",
lines[0] ? lines[0] : "(signature was null)");
free_strings (lines);
return -1;
}
if (lines[1] == NULL) {
reply_with_error ("parted didn't return a line describing the device");
free_strings (lines);
return -1;
}
size_t row;
int pnum;
for (row = 2; lines[row] != NULL; ++row) {
if (sscanf (lines[row], "%d:", &pnum) != 1) {
reply_with_error ("could not parse row from output of parted print command: %s", lines[row]);
free_strings (lines);
return -1;
}
if (pnum == partnum)
break;
}
if (lines[row] == NULL) {
reply_with_error ("partition number %d not found", partnum);
free_strings (lines);
return -1;
}
char *boot = get_table_field (lines[row], 6);
if (boot == NULL) {
free_strings (lines);
return -1;
}
int r = STREQ (boot, "boot");
free (boot);
free_strings (lines);
return r;
}
else {
/* Old-style: First look for the line matching "^Number". */
size_t start = 0, header, row;
for (row = 0; lines[row] != NULL; ++row)
if (STRPREFIX (lines[row], "Number")) {
start = row+1;
header = row;
break;
}
if (start == 0) {
reply_with_error ("parted output has no \"Number\" line");
free_strings (lines);
return -1;
}
/* Now we have to look at the column number of the "Flags" field.
* This is because parted's output has no way to represent a
* missing field except as whitespace, so we cannot just count
* fields from the left. eg. The "File system" field is often
* missing in the output.
*/
char *p = strstr (lines[header], "Flags");
if (!p) {
reply_with_error ("parted output has no \"Flags\" field");
free_strings (lines);
return -1;
}
size_t col = p - lines[header];
/* Look for the line corresponding to this partition number. */
row = start + partnum - 1;
if (row >= count_strings (lines) || !STRPREFIX (lines[row], " ")) {
reply_with_error ("partition number out of range: %d", partnum);
free_strings (lines);
return -1;
}
int r = STRPREFIX (&lines[row][col], "boot");
free_strings (lines);
return r;
}
}
char *
do_part_get_parttype (const char *device)
{
int parted_has_m_opt = test_parted_m_opt ();
if (parted_has_m_opt == -1)
return NULL;
char *out = print_partition_table (device, parted_has_m_opt);
if (!out)
return NULL;
if (parted_has_m_opt) {
/* New-style parsing using the "machine-readable" format from
* 'parted -m'.
*/
char **lines = split_lines (out);
free (out);
if (!lines)
return NULL;
if (lines[0] == NULL || STRNEQ (lines[0], "BYT;")) {
reply_with_error ("unknown signature, expected \"BYT;\" as first line of the output: %s",
lines[0] ? lines[0] : "(signature was null)");
free_strings (lines);
return NULL;
}
if (lines[1] == NULL) {
reply_with_error ("parted didn't return a line describing the device");
free_strings (lines);
return NULL;
}
/* lines[1] is something like:
* "/dev/sda:1953525168s:scsi:512:512:msdos:ATA Hitachi HDT72101;"
*/
char *r = get_table_field (lines[1], 5);
if (r == NULL) {
free_strings (lines);
return NULL;
}
free_strings (lines);
/* If "loop" return an error (RHBZ#634246). */
if (STREQ (r, "loop")) {
free (r);
reply_with_error ("not a partitioned device");
return NULL;
}
return r;
}
else {
/* Old-style. Look for "\nPartition Table: <str>\n". */
char *p = strstr (out, "\nPartition Table: ");
if (!p) {
reply_with_error ("parted didn't return Partition Table line");
free (out);
return NULL;
}
p += 18;
char *q = strchr (p, '\n');
if (!q) {
reply_with_error ("parted Partition Table has no end of line char");
free (out);
return NULL;
}
*q = '\0';
p = strdup (p);
free (out);
if (!p) {
reply_with_perror ("strdup");
return NULL;
}
/* If "loop" return an error (RHBZ#634246). */
if (STREQ (p, "loop")) {
free (p);
reply_with_error ("not a partitioned device");
return NULL;
}
return p; /* caller frees */
}
}
