static void free_dirlist(struct wh_dirlist **ls0, int type)
{
struct wh_dirlist *prev = NULL, *next, *ls = *ls0;
*ls0 = NULL;
DBG(LIST, ul_debugobj(*ls0, "free dirlist"));
while (ls) {
if (ls->type & type) {
next = ls->next;
DBG(LIST, ul_debugobj(*ls0, " free: %s", ls->path));
free(ls->path);
free(ls);
ls = next;
if (prev)
prev->next = ls;
} else {
if (!prev)
*ls0 = ls; /* first unremoved */
prev = ls;
ls = ls->next;
}
}
return;
}
/*
* Zeros in-memory first sector buffer
*/
int fdisk_init_firstsector_buffer(struct fdisk_context *cxt)
{
if (!cxt)
return -EINVAL;
if (!cxt->firstsector || cxt->firstsector_bufsz != cxt->sector_size) {
/* Let's allocate a new buffer if no allocated yet, or the
* current buffer has incorrect size */
if (!cxt->parent || cxt->parent->firstsector != cxt->firstsector)
free(cxt->firstsector);
DBG(CXT, ul_debugobj(cxt, "initialize in-memory first sector "
"buffer [sector_size=%lu]", cxt->sector_size));
cxt->firstsector = calloc(1, cxt->sector_size);
if (!cxt->firstsector)
return -ENOMEM;
cxt->firstsector_bufsz = cxt->sector_size;
return 0;
}
DBG(CXT, ul_debugobj(cxt, "zeroize in-memory first sector buffer"));
memset(cxt->firstsector, 0, cxt->firstsector_bufsz);
return 0;
}
/**
* fdisk_add_partition:
* @cxt: fdisk context
* @pa: template for the partition (or NULL)
* @partno: NULL or returns new partition number
*
* If @pa is not specified or any @pa item is missiong the libfdisk will ask by
* fdisk_ask_ API.
*
* Adds a new partition to disklabel.
*
* Returns: 0 on success, <0 on error.
*/
int fdisk_add_partition(struct fdisk_context *cxt,
struct fdisk_partition *pa,
size_t *partno)
{
int rc;
assert(cxt);
assert(cxt->label);
if (!cxt || !cxt->label)
return -EINVAL;
if (!cxt->label->op->add_part)
return -ENOSYS;
if (fdisk_missing_geometry(cxt))
return -EINVAL;
if (pa)
DBG(CXT, ul_debugobj(cxt, "adding new partition %p (start=%ju, end=%ju, size=%ju, "
"defaults(start=%s, end=%s, partno=%s)",
pa,
(uintmax_t) fdisk_partition_get_start(pa),
(uintmax_t) fdisk_partition_get_end(pa),
(uintmax_t) fdisk_partition_get_size(pa),
pa->start_follow_default ? "yes" : "no",
pa->end_follow_default ? "yes" : "no",
pa->partno_follow_default ? "yes" : "no"));
else
DBG(CXT, ul_debugobj(cxt, "adding partition"));
rc = cxt->label->op->add_part(cxt, pa, partno);
DBG(CXT, ul_debugobj(cxt, "add partition done (rc=%d)", rc));
return rc;
}
/**
* fdisk_partition_next_partno:
* @pa: partition
* @cxt: context
* @n: returns partition number
*
* If partno-follow-default (see fdisk_partition_partno_follow_default())
* enabled then returns next expected partno, otherwise use Ask API to ask user
* for the next partno.
*
* Returns: 0 on success, <0 on error
*/
int fdisk_partition_next_partno(
struct fdisk_partition *pa,
struct fdisk_context *cxt,
size_t *n)
{
assert(cxt);
assert(n);
if (pa && pa->partno_follow_default) {
size_t i;
DBG(PART, ul_debugobj(pa, "next partno (follow default)"));
for (i = 0; i < cxt->label->nparts_max; i++) {
if (!fdisk_is_partition_used(cxt, i)) {
*n = i;
return 0;
}
}
return -ERANGE;
} else if (pa && fdisk_partition_has_partno(pa)) {
DBG(PART, ul_debugobj(pa, "next partno (specified=%zu)", pa->partno));
if (pa->partno >= cxt->label->nparts_max)
return -ERANGE;
*n = pa->partno;
} else
return fdisk_ask_partnum(cxt, n, 1);
return 0;
}
int fdisk_read_firstsector(struct fdisk_context *cxt)
{
ssize_t r;
int rc;
assert(cxt);
assert(cxt->sector_size);
rc = fdisk_init_firstsector_buffer(cxt);
if (rc)
return rc;
assert(cxt->sector_size == cxt->firstsector_bufsz);
DBG(CXT, ul_debugobj(cxt, "reading first sector "
"buffer [sector_size=%lu]", cxt->sector_size));
r = lseek(cxt->dev_fd, 0, SEEK_SET);
if (r == -1)
{
DBG(CXT, ul_debugobj(cxt, "failed to seek to first sector %m"));
return -errno;
}
r = read(cxt->dev_fd, cxt->firstsector, cxt->sector_size);
if (r != cxt->sector_size) {
if (!errno)
errno = EINVAL; /* probably too small file/device */
DBG(CXT, ul_debugobj(cxt, "failed to read first sector %m"));
return -errno;
}
return 0;
}
/**
* mnt_context_next_umount:
* @cxt: context
* @itr: iterator
* @fs: returns the current filesystem
* @mntrc: returns the return code from mnt_context_umount()
* @ignored: returns 1 for not matching
*
* This function tries to umount the next filesystem from mtab (as returned by
* mnt_context_get_mtab()).
*
* You can filter out filesystems by:
* mnt_context_set_options_pattern() to simulate umount -a -O pattern
* mnt_context_set_fstype_pattern() to simulate umount -a -t pattern
*
* If the filesystem is not mounted or does not match the defined criteria,
* then the function mnt_context_next_umount() returns zero, but the @ignored is
* non-zero. Note that the root filesystem is always ignored.
*
* If umount(2) syscall or umount.type helper failed, then the
* mnt_context_next_umount() function returns zero, but the @mntrc is non-zero.
* Use also mnt_context_get_status() to check if the filesystem was
* successfully umounted.
*
* Returns: 0 on success,
* <0 in case of error (!= umount(2) errors)
* 1 at the end of the list.
*/
int mnt_context_next_umount(struct libmnt_context *cxt,
struct libmnt_iter *itr,
struct libmnt_fs **fs,
int *mntrc,
int *ignored)
{
struct libmnt_table *mtab;
const char *tgt;
int rc;
if (ignored)
*ignored = 0;
if (mntrc)
*mntrc = 0;
if (!cxt || !fs || !itr)
return -EINVAL;
rc = mnt_context_get_mtab(cxt, &mtab);
cxt->mtab = NULL; /* do not reset mtab */
mnt_reset_context(cxt);
cxt->mtab = mtab;
if (rc)
return rc;
do {
rc = mnt_table_next_fs(mtab, itr, fs);
if (rc != 0)
return rc; /* no more filesystems (or error) */
tgt = mnt_fs_get_target(*fs);
} while (!tgt);
DBG(CXT, ul_debugobj(cxt, "next-umount: trying %s [fstype: %s, t-pattern: %s, options: %s, O-pattern: %s]", tgt,
mnt_fs_get_fstype(*fs), cxt->fstype_pattern, mnt_fs_get_options(*fs), cxt->optstr_pattern));
/* ignore filesystems which don't match options patterns */
if ((cxt->fstype_pattern && !mnt_fs_match_fstype(*fs,
cxt->fstype_pattern)) ||
/* ignore filesystems which don't match type patterns */
(cxt->optstr_pattern && !mnt_fs_match_options(*fs,
cxt->optstr_pattern))) {
if (ignored)
*ignored = 1;
DBG(CXT, ul_debugobj(cxt, "next-umount: not-match"));
return 0;
}
rc = mnt_context_set_fs(cxt, *fs);
if (rc)
return rc;
rc = mnt_context_umount(cxt);
if (mntrc)
*mntrc = rc;
return 0;
}
/**
* mnt_table_parse_stream:
* @tb: tab pointer
* @f: file stream
* @filename: filename used for debug and error messages
*
* Returns: 0 on success, negative number in case of error.
*/
int mnt_table_parse_stream(struct libmnt_table *tb, FILE *f, const char *filename)
{
int nlines = 0;
int rc = -1;
int flags = 0;
pid_t tid = -1;
assert(tb);
assert(f);
assert(filename);
DBG(TAB, ul_debugobj(tb, "%s: start parsing [entries=%d, filter=%s]",
filename, mnt_table_get_nents(tb),
tb->fltrcb ? "yes" : "not"));
/* necessary for /proc/mounts only, the /proc/self/mountinfo
* parser sets the flag properly
*/
if (filename && strcmp(filename, _PATH_PROC_MOUNTS) == 0)
flags = MNT_FS_KERNEL;
while (!feof(f)) {
struct libmnt_fs *fs = mnt_new_fs();
if (!fs)
goto err;
rc = mnt_table_parse_next(tb, f, fs, filename, &nlines);
if (!rc && tb->fltrcb && tb->fltrcb(fs, tb->fltrcb_data))
rc = 1; /* filtered out by callback... */
if (!rc) {
rc = mnt_table_add_fs(tb, fs);
fs->flags |= flags;
if (rc == 0 && tb->fmt == MNT_FMT_MOUNTINFO)
rc = kernel_fs_postparse(tb, fs, &tid, filename);
}
mnt_unref_fs(fs);
if (rc) {
if (rc == 1)
continue; /* recoverable error */
if (feof(f))
break;
goto err; /* fatal error */
}
}
DBG(TAB, ul_debugobj(tb, "%s: stop parsing (%d entries)",
filename, mnt_table_get_nents(tb)));
return 0;
err:
DBG(TAB, ul_debugobj(tb, "%s: parse error (rc=%d)", filename, rc));
return rc;
}
/**
* fdisk_new_nested_context:
* @parent: parental context
* @name: optional label name (e.g. "bsd")
*
* This is supported for MBR+BSD and GPT+pMBR only.
*
* Returns: new context for nested partiton table.
*/
struct fdisk_context *fdisk_new_nested_context(struct fdisk_context *parent,
const char *name)
{
struct fdisk_context *cxt;
struct fdisk_label *lb = NULL;
assert(parent);
cxt = calloc(1, sizeof(*cxt));
if (!cxt)
return NULL;
DBG(CXT, ul_debugobj(parent, "alloc nested [%p]", cxt));
cxt->dev_fd = parent->dev_fd;
cxt->refcount = 1;
cxt->parent = parent;
cxt->io_size = parent->io_size;
cxt->optimal_io_size = parent->optimal_io_size;
cxt->min_io_size = parent->min_io_size;
cxt->phy_sector_size = parent->phy_sector_size;
cxt->sector_size = parent->sector_size;
cxt->alignment_offset = parent->alignment_offset;
cxt->grain = parent->grain;
cxt->first_lba = parent->first_lba;
cxt->total_sectors = parent->total_sectors;
cxt->firstsector = parent->firstsector;
cxt->ask_cb = parent->ask_cb;
cxt->ask_data = parent->ask_data;
cxt->geom = parent->geom;
if (name) {
if (strcmp(name, "bsd") == 0)
lb = cxt->labels[ cxt->nlabels++ ] = fdisk_new_bsd_label(cxt);
else if (strcmp(name, "dos") == 0)
lb = cxt->labels[ cxt->nlabels++ ] = fdisk_new_dos_label(cxt);
}
if (lb) {
DBG(CXT, ul_debugobj(cxt, "probing for nested %s", lb->name));
cxt->label = lb;
if (lb->op->probe(cxt) == 1)
__fdisk_switch_label(cxt, lb);
else {
DBG(CXT, ul_debugobj(cxt, "not found %s label", lb->name));
if (lb->op->deinit)
lb->op->deinit(lb);
cxt->label = NULL;
}
}
return cxt;
}
/**
* fdisk_label_parse_parttype:
* @lb: label
* @str: string to parse from
*
* Parses partition type from @str according to the label. The function returns
* a pointer to static table of the partition types, or newly allocated
* partition type for unknown types (see fdisk_parttype_is_unknown(). It's
* safe to call fdisk_unref_parttype() for all results.
*
* Returns: pointer to type or NULL on error.
*/
struct fdisk_parttype *fdisk_label_parse_parttype(
const struct fdisk_label *lb,
const char *str)
{
struct fdisk_parttype *types, *ret = NULL;
char *end = NULL;
assert(lb);
if (!lb->nparttypes)
return NULL;
DBG(LABEL, ul_debugobj(lb, "parsing '%s' (%s) partition type",
str, lb->name));
types = lb->parttypes;
if (types[0].typestr == NULL && isxdigit(*str)) {
unsigned int code = 0;
errno = 0;
code = strtol(str, &end, 16);
if (errno || *end != '\0') {
DBG(LABEL, ul_debugobj(lb, "parsing failed: %m"));
return NULL;
}
ret = fdisk_label_get_parttype_from_code(lb, code);
if (ret)
goto done;
ret = fdisk_new_unknown_parttype(code, NULL);
} else {
int i;
/* maybe specified by type string (e.g. UUID) */
ret = fdisk_label_get_parttype_from_string(lb, str);
if (ret)
goto done;
/* maybe specified by order number */
errno = 0;
i = strtol(str, &end, 0);
if (errno == 0 && *end == '\0' && i > 0
&& i - 1 < (int) lb->nparttypes) {
ret = &types[i - 1];
goto done;
}
ret = fdisk_new_unknown_parttype(0, str);
}
done:
DBG(PARTTYPE, ul_debugobj(ret, "returns parsed '%s' [%s] partition type",
ret->name, ret->typestr ? : ""));
return ret;
}
is_mounted_same_loopfile(struct libmnt_context *cxt,
const char *target,
const char *backing_file,
uint64_t offset)
{
struct libmnt_table *tb;
struct libmnt_iter itr;
struct libmnt_fs *fs;
struct libmnt_cache *cache;
const char *bf;
int rc = 0;
assert(cxt);
assert(cxt->fs);
assert((cxt->flags & MNT_FL_MOUNTFLAGS_MERGED));
if (mnt_context_get_mtab(cxt, &tb))
return 0;
DBG(LOOP, ul_debugobj(cxt, "checking if %s mounted on %s",
backing_file, target));
cache = mnt_context_get_cache(cxt);
mnt_reset_iter(&itr, MNT_ITER_BACKWARD);
bf = cache ? mnt_resolve_path(backing_file, cache) : backing_file;
/* Search for a mountpoint node in mtab, proceed if any of these have the
* loop option set or the device is a loop device
*/
while (rc == 0 && mnt_table_next_fs(tb, &itr, &fs) == 0) {
const char *src = mnt_fs_get_source(fs);
const char *opts = mnt_fs_get_user_options(fs);
char *val;
size_t len;
if (!src || !mnt_fs_match_target(fs, target, cache))
continue;
rc = 0;
if (strncmp(src, "/dev/loop", 9) == 0) {
rc = loopdev_is_used((char *) src, bf, offset, 0, LOOPDEV_FL_OFFSET);
} else if (opts && (cxt->user_mountflags & MNT_MS_LOOP) &&
mnt_optstr_get_option(opts, "loop", &val, &len) == 0 && val) {
val = strndup(val, len);
rc = loopdev_is_used((char *) val, bf, offset, 0, LOOPDEV_FL_OFFSET);
free(val);
}
}
if (rc)
DBG(LOOP, ul_debugobj(cxt, "%s already mounted", backing_file));
return rc;
}
int mnt_context_is_loopdev(struct libmnt_context *cxt)
{
const char *type, *src;
assert(cxt);
/* The mount flags have to be merged, otherwise we have to use
* expensive mnt_context_get_user_mflags() instead of cxt->user_mountflags. */
assert((cxt->flags & MNT_FL_MOUNTFLAGS_MERGED));
if (!cxt->fs)
return 0;
src = mnt_fs_get_srcpath(cxt->fs);
if (!src)
return 0; /* backing file not set */
if (cxt->user_mountflags & (MNT_MS_LOOP |
MNT_MS_OFFSET |
MNT_MS_SIZELIMIT)) {
DBG(LOOP, ul_debugobj(cxt, "loopdev specific options detected"));
return 1;
}
if ((cxt->mountflags & (MS_BIND | MS_MOVE))
|| mnt_context_propagation_only(cxt))
return 0;
/* Automatically create a loop device from a regular file if a
* filesystem is not specified or the filesystem is known for libblkid
* (these filesystems work with block devices only). The file size
* should be at least 1KiB, otherwise we will create an empty loopdev with
* no mountable filesystem...
*
* Note that there is no restriction (on kernel side) that would prevent a regular
* file as a mount(2) source argument. A filesystem that is able to mount
* regular files could be implemented.
*/
type = mnt_fs_get_fstype(cxt->fs);
if (mnt_fs_is_regular(cxt->fs) &&
(!type || strcmp(type, "auto") == 0 || blkid_known_fstype(type))) {
struct stat st;
if (stat(src, &st) == 0 && S_ISREG(st.st_mode) &&
st.st_size > 1024) {
DBG(LOOP, ul_debugobj(cxt, "automatically enabling loop= option"));
cxt->user_mountflags |= MNT_MS_LOOP;
mnt_optstr_append_option(&cxt->fs->user_optstr, "loop", NULL);
return 1;
}
}
return 0;
}
int __fdisk_switch_label(struct fdisk_context *cxt, struct fdisk_label *lb)
{
if (!lb || !cxt)
return -EINVAL;
if (lb->disabled) {
DBG(CXT, ul_debugobj(cxt, "*** attempt to switch to disabled label %s -- ignore!", lb->name));
return -EINVAL;
}
cxt->label = lb;
DBG(CXT, ul_debugobj(cxt, "--> switching context to %s!", lb->name));
return 0;
}
/**
* fdisk_new_nested_context:
* @parent: parental context
* @name: optional label name (e.g. "bsd")
*
* Create a new nested fdisk context for nested disk labels (e.g. BSD or PMBR).
* The function also probes for the nested label on the device if device is
* already assigned to parent.
*
* The new context is initialized according to @parent and both context shares
* some settings and file descriptor to the device. The child propagate some
* changes (like fdisk_assign_device()) to parent, but it does not work
* vice-versa. The behavior is undefined if you assign another device to
* parent.
*
* Returns: new context for nested partition table.
*/
struct fdisk_context *fdisk_new_nested_context(struct fdisk_context *parent,
const char *name)
{
struct fdisk_context *cxt;
struct fdisk_label *lb = NULL;
assert(parent);
cxt = calloc(1, sizeof(*cxt));
if (!cxt)
return NULL;
DBG(CXT, ul_debugobj(parent, "alloc nested [%p] [name=%s]", cxt, name));
cxt->refcount = 1;
fdisk_ref_context(parent);
cxt->parent = parent;
if (init_nested_from_parent(cxt, 1) != 0) {
cxt->parent = NULL;
fdisk_unref_context(cxt);
return NULL;
}
if (name) {
if (strcasecmp(name, "bsd") == 0)
lb = cxt->labels[ cxt->nlabels++ ] = fdisk_new_bsd_label(cxt);
else if (strcasecmp(name, "dos") == 0 || strcasecmp(name, "mbr") == 0)
lb = cxt->labels[ cxt->nlabels++ ] = fdisk_new_dos_label(cxt);
}
if (lb && parent->dev_fd >= 0) {
DBG(CXT, ul_debugobj(cxt, "probing for nested %s", lb->name));
cxt->label = lb;
if (lb->op->probe(cxt) == 1)
__fdisk_switch_label(cxt, lb);
else {
DBG(CXT, ul_debugobj(cxt, "not found %s label", lb->name));
if (lb->op->deinit)
lb->op->deinit(lb);
cxt->label = NULL;
}
}
return cxt;
}
/*
* This function uses @uf to find a corresponding record in @tb, then the record
* from @tb is updated (user specific mount options are added).
*
* Note that @uf must contain only user specific mount options instead of
* VFS options (note that FS options are ignored).
*
* Returns modified filesystem (from @tb) or NULL.
*/
static struct libmnt_fs *mnt_table_merge_user_fs(struct libmnt_table *tb, struct libmnt_fs *uf)
{
struct libmnt_fs *fs;
struct libmnt_iter itr;
const char *optstr, *src, *target, *root, *attrs;
assert(tb);
assert(uf);
if (!tb || !uf)
return NULL;
DBG(TAB, ul_debugobj(tb, "merging user fs"));
src = mnt_fs_get_srcpath(uf);
target = mnt_fs_get_target(uf);
optstr = mnt_fs_get_user_options(uf);
attrs = mnt_fs_get_attributes(uf);
root = mnt_fs_get_root(uf);
if (!src || !target || !root || (!attrs && !optstr))
return NULL;
mnt_reset_iter(&itr, MNT_ITER_BACKWARD);
while(mnt_table_next_fs(tb, &itr, &fs) == 0) {
const char *r = mnt_fs_get_root(fs);
if (fs->flags & MNT_FS_MERGED)
continue;
if (r && strcmp(r, root) == 0
&& mnt_fs_streq_target(fs, target)
&& mnt_fs_streq_srcpath(fs, src))
break;
}
if (fs) {
DBG(TAB, ul_debugobj(tb, "found fs -- appending user optstr"));
mnt_fs_append_options(fs, optstr);
mnt_fs_append_attributes(fs, attrs);
mnt_fs_set_bindsrc(fs, mnt_fs_get_bindsrc(uf));
fs->flags |= MNT_FS_MERGED;
DBG(TAB, ul_debugobj(tb, "found fs:"));
DBG(TAB, mnt_fs_print_debug(fs, stderr));
}
return fs;
}
/**
* fdisk_unref_context:
* @cxt: fdisk context
*
* Deallocates context struct.
*/
void fdisk_unref_context(struct fdisk_context *cxt)
{
int i;
if (!cxt)
return;
cxt->refcount--;
if (cxt->refcount <= 0) {
DBG(CXT, ul_debugobj(cxt, "freeing context %p for %s", cxt, cxt->dev_path));
reset_context(cxt); /* this is sensitive to parent<->child relationship! */
/* deallocate label's private stuff */
for (i = 0; i < cxt->nlabels; i++) {
if (!cxt->labels[i])
continue;
if (cxt->labels[i]->op->free)
cxt->labels[i]->op->free(cxt->labels[i]);
else
free(cxt->labels[i]);
}
fdisk_unref_context(cxt->parent);
cxt->parent = NULL;
free(cxt);
}
}
/**
* fdisk_set_partition:
* @cxt: context
* @partno: partition number (0 is the first partition)
* @pa: new partition setting
*
* Modifies disklabel according to setting with in @pa.
*
* Returns: 0 on success, <0 on error.
*/
int fdisk_set_partition(struct fdisk_context *cxt, size_t partno,
struct fdisk_partition *pa)
{
struct fdisk_partition *xpa = pa;
int rc;
if (!cxt || !cxt->label || !pa)
return -EINVAL;
if (!cxt->label->op->set_part)
return -ENOSYS;
if (pa->resize || fdisk_partition_has_start(pa) || fdisk_partition_has_size(pa)) {
xpa = __copy_partition(pa);
xpa->movestart = 0;
xpa->resize = 0;
FDISK_INIT_UNDEF(xpa->size);
FDISK_INIT_UNDEF(xpa->start);
rc = recount_resize(cxt, partno, xpa, pa);
if (rc)
goto done;
}
DBG(CXT, ul_debugobj(cxt, "setting partition %zu %p (start=%ju, end=%ju, size=%ju)",
partno, xpa,
(uintmax_t) fdisk_partition_get_start(xpa),
(uintmax_t) fdisk_partition_get_end(xpa),
(uintmax_t) fdisk_partition_get_size(xpa)));
rc = cxt->label->op->set_part(cxt, partno, xpa);
done:
if (xpa != pa)
fdisk_unref_partition(xpa);
return rc;
}
/**
* scols_line_alloc_cells:
* @ln: a pointer to a struct libscols_line instance
* @n: the number of elements
*
* Allocates space for @n cells. This function is optional,
* and libsmartcols automatically allocates necessary cells
* according to number of columns in the table when you add
* the line to the table. See scols_table_add_line().
*
* Returns: 0, a negative value in case of an error.
*/
int scols_line_alloc_cells(struct libscols_line *ln, size_t n)
{
struct libscols_cell *ce;
if (!ln)
return -EINVAL;
if (ln->ncells == n)
return 0;
if (!n) {
scols_line_free_cells(ln);
return 0;
}
DBG(LINE, ul_debugobj(ln, "alloc %zu cells", n));
ce = realloc(ln->cells, n * sizeof(struct libscols_cell));
if (!ce)
return -errno;
if (n > ln->ncells)
memset(ce + ln->ncells, 0,
(n - ln->ncells) * sizeof(struct libscols_cell));
ln->cells = ce;
ln->ncells = n;
return 0;
}
/**
* fdisk_create_disklabel:
* @cxt: fdisk context
* @name: label name
*
* Creates a new disk label of type @name. If @name is NULL, then it
* will create a default system label type, either SUN or DOS.
*
* Returns 0 on success, otherwise, a corresponding error.
*/
int fdisk_create_disklabel(struct fdisk_context *cxt, const char *name)
{
int haslabel = 0;
struct fdisk_label *lb;
if (!cxt)
return -EINVAL;
if (!name) { /* use default label creation */
#ifdef __sparc__
name = "sun";
#else
name = "dos";
#endif
}
if (cxt->label) {
fdisk_deinit_label(cxt->label);
haslabel = 1;
}
lb = fdisk_context_get_label(cxt, name);
if (!lb || lb->disabled)
return -EINVAL;
if (!lb->op->create)
return -ENOSYS;
__fdisk_context_switch_label(cxt, lb);
if (haslabel && !cxt->parent)
fdisk_reset_device_properties(cxt);
DBG(CXT, ul_debugobj(cxt, "create a new %s label", lb->name));
return cxt->label->op->create(cxt);
}
/* note that the @key could be the same pointer as @value */
static int cache_add_entry(struct libmnt_cache *cache, char *key,
char *value, int flag)
{
struct mnt_cache_entry *e;
assert(cache);
assert(value);
assert(key);
if (cache->nents == cache->nallocs) {
size_t sz = cache->nallocs + MNT_CACHE_CHUNKSZ;
e = realloc(cache->ents, sz * sizeof(struct mnt_cache_entry));
if (!e)
return -ENOMEM;
cache->ents = e;
cache->nallocs = sz;
}
e = &cache->ents[cache->nents];
e->key = key;
e->value = value;
e->flag = flag;
cache->nents++;
DBG(CACHE, ul_debugobj(cache, "add entry [%2zd] (%s): %s: %s",
cache->nents,
(flag & MNT_CACHE_ISPATH) ? "path" : "tag",
value, key));
return 0;
}
static int append_comment(struct libmnt_table *tb,
struct libmnt_fs *fs,
const char *comm,
int eof)
{
int rc, intro = mnt_table_get_nents(tb) == 0;
if (intro && is_terminated_by_blank(mnt_table_get_intro_comment(tb)))
intro = 0;
DBG(TAB, ul_debugobj(tb, "appending %s comment",
intro ? "intro" :
eof ? "trailing" : "fs"));
if (intro)
rc = mnt_table_append_intro_comment(tb, comm);
else if (eof) {
rc = mnt_table_set_trailing_comment(tb,
mnt_fs_get_comment(fs));
if (!rc)
rc = mnt_table_append_trailing_comment(tb, comm);
if (!rc)
rc = mnt_fs_set_comment(fs, NULL);
} else
rc = mnt_fs_append_comment(fs, comm);
return rc;
}
struct fdisk_context *fdisk_new_context(void)
{
struct fdisk_context *cxt;
cxt = calloc(1, sizeof(*cxt));
if (!cxt)
return NULL;
DBG(CXT, ul_debugobj(cxt, "alloc"));
cxt->dev_fd = -1;
/*
* Allocate label specific structs.
*
* This is necessary (for example) to store label specific
* context setting.
*/
cxt->labels[ cxt->nlabels++ ] = fdisk_new_gpt_label(cxt);
cxt->labels[ cxt->nlabels++ ] = fdisk_new_dos_label(cxt);
cxt->labels[ cxt->nlabels++ ] = fdisk_new_bsd_label(cxt);
cxt->labels[ cxt->nlabels++ ] = fdisk_new_sgi_label(cxt);
cxt->labels[ cxt->nlabels++ ] = fdisk_new_sun_label(cxt);
return cxt;
}
int scols_line_move_cells(struct libscols_line *ln, size_t newn, size_t oldn)
{
struct libscols_cell ce;
if (!ln || newn >= ln->ncells || oldn >= ln->ncells)
return -EINVAL;
if (oldn == newn)
return 0;
DBG(LINE, ul_debugobj(ln, "move cells[%zu] -> cells[%zu]", oldn, newn));
/* remember data from old position */
memcpy(&ce, &ln->cells[oldn], sizeof(struct libscols_cell));
/* remove old position (move data behind oldn to oldn) */
if (oldn + 1 < ln->ncells)
memmove(ln->cells + oldn, ln->cells + oldn + 1,
(ln->ncells - oldn - 1) * sizeof(struct libscols_cell));
/* create a space for new position */
if (newn + 1 < ln->ncells)
memmove(ln->cells + newn + 1, ln->cells + newn,
(ln->ncells - newn - 1) * sizeof(struct libscols_cell));
/* copy original data to new position */
memcpy(&ln->cells[newn], &ce, sizeof(struct libscols_cell));
return 0;
}
static int tabdiff_reset(struct libmnt_tabdiff *df)
{
assert(df);
DBG(DIFF, ul_debugobj(df, "resetting"));
/* zeroize all entries and move them to the list of unused
*/
while (!list_empty(&df->changes)) {
struct tabdiff_entry *de = list_entry(df->changes.next,
struct tabdiff_entry, changes);
list_del(&de->changes);
list_add_tail(&de->changes, &df->unused);
mnt_unref_fs(de->new_fs);
mnt_unref_fs(de->old_fs);
de->new_fs = de->old_fs = NULL;
de->oper = 0;
}
df->nchanges = 0;
return 0;
}
static void reset_context(struct fdisk_context *cxt)
{
size_t i;
DBG(CXT, ul_debugobj(cxt, "*** resetting context"));
/* reset drives' private data */
for (i = 0; i < cxt->nlabels; i++)
fdisk_deinit_label(cxt->labels[i]);
if (cxt->parent) {
/* the first sector may be independent on parent */
if (cxt->parent->firstsector != cxt->firstsector)
free(cxt->firstsector);
} else {
/* we close device only in primary context */
if (cxt->dev_fd > -1)
close(cxt->dev_fd);
free(cxt->firstsector);
}
free(cxt->dev_path);
cxt->dev_path = NULL;
cxt->dev_fd = -1;
cxt->firstsector = NULL;
cxt->firstsector_bufsz = 0;
fdisk_zeroize_device_properties(cxt);
fdisk_unref_script(cxt->script);
cxt->script = NULL;
cxt->label = NULL;
}
static int prepare_helper_from_options(struct libmnt_context *cxt,
const char *name)
{
char *suffix = NULL;
const char *opts;
size_t valsz;
if (mnt_context_is_nohelpers(cxt))
return 0;
opts = mnt_fs_get_user_options(cxt->fs);
if (!opts)
return 0;
if (mnt_optstr_get_option(opts, name, &suffix, &valsz))
return 0;
suffix = strndup(suffix, valsz);
if (!suffix)
return -ENOMEM;
DBG(CXT, ul_debugobj(cxt, "umount: umount.%s %s requested", suffix, name));
return mnt_context_prepare_helper(cxt, "umount", suffix);
}
/* special case for '*' in the paths */
static void dirlist_add_subdir(struct wh_dirlist **ls, int type, const char *dir)
{
char buf[PATH_MAX], *d;
DIR *dirp;
struct dirent *dp;
strncpy(buf, dir, PATH_MAX);
buf[PATH_MAX - 1] = '\0';
d = strchr(buf, '*');
if (!d)
return;
*d = 0;
dirp = opendir(buf);
if (!dirp)
return;
DBG(LIST, ul_debugobj(*ls, " scanning subdir: %s", dir));
while ((dp = readdir(dirp)) != NULL) {
if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, ".."))
continue;
snprintf(d, PATH_MAX - (d - buf), "%s", dp->d_name);
/* a dir definition can have a star in middle of path */
strcat(buf, strchr(dir, '*') + 1);
dirlist_add_dir(ls, type, buf);
}
closedir(dirp);
return;
}
/**
* scols_copy_column:
* @cl: a pointer to a struct libscols_column instance
*
* Creates a new column and copies @cl's data over to it.
*
* Returns: a pointer to a new struct libscols_column instance.
*/
struct libscols_column *scols_copy_column(const struct libscols_column *cl)
{
struct libscols_column *ret;
if (!cl)
return NULL;
ret = scols_new_column();
if (!ret)
return NULL;
DBG(COL, ul_debugobj((void *) cl, "copy to %p", ret));
if (scols_column_set_color(ret, cl->color))
goto err;
if (scols_cell_copy_content(&ret->header, &cl->header))
goto err;
ret->width = cl->width;
ret->width_min = cl->width_min;
ret->width_max = cl->width_max;
ret->width_avg = cl->width_avg;
ret->width_hint = cl->width_hint;
ret->flags = cl->flags;
ret->is_extreme = cl->is_extreme;
return ret;
err:
scols_unref_column(ret);
return NULL;
}
static void reset_context(struct fdisk_context *cxt)
{
size_t i;
DBG(CXT, ul_debugobj(cxt, "*** resetting context"));
/* reset drives' private data */
for (i = 0; i < cxt->nlabels; i++)
fdisk_deinit_label(cxt->labels[i]);
/* free device specific stuff */
if (!cxt->parent && cxt->dev_fd > -1)
close(cxt->dev_fd);
free(cxt->dev_path);
if (cxt->parent == NULL || cxt->parent->firstsector != cxt->firstsector)
free(cxt->firstsector);
/* initialize */
cxt->dev_fd = -1;
cxt->dev_path = NULL;
cxt->firstsector = NULL;
fdisk_zeroize_device_properties(cxt);
cxt->label = NULL;
}
static char *canonicalize_path_and_cache(const char *path,
struct libmnt_cache *cache)
{
char *p = NULL;
char *key = NULL;
char *value = NULL;
DBG(CACHE, ul_debugobj(cache, "canonicalize path %s", path));
p = canonicalize_path(path);
if (p && cache) {
value = p;
key = strcmp(path, p) == 0 ? value : strdup(path);
if (!key || !value)
goto error;
if (cache_add_entry(cache, key, value,
MNT_CACHE_ISPATH))
goto error;
}
return p;
error:
if (value != key)
free(value);
free(key);
return NULL;
}
/*
* Deletes loop device
*/
int mnt_context_delete_loopdev(struct libmnt_context *cxt)
{
const char *src;
int rc;
assert(cxt);
assert(cxt->fs);
if (!cxt)
return -EINVAL;
src = mnt_fs_get_srcpath(cxt->fs);
if (!src)
return -EINVAL;
if (cxt->loopdev_fd > -1)
close(cxt->loopdev_fd);
rc = loopdev_delete(src);
cxt->flags &= ~MNT_FL_LOOPDEV_READY;
cxt->loopdev_fd = -1;
DBG(CXT, ul_debugobj(cxt, "loopdev deleted [rc=%d]", rc));
return rc;
}