#include "strutils.h"
#include "fdiskP.h"
struct fdisk_ask *fdisk_new_ask(void)
{
return calloc(1, sizeof(struct fdisk_ask));
}
void fdisk_reset_ask(struct fdisk_ask *ask)
{
assert(ask);
free(ask->data.num.range);
free(ask->query);
memset(ask, 0, sizeof(*ask));
}
void fdisk_free_ask(struct fdisk_ask *ask)
{
if (!ask)
return;
fdisk_reset_ask(ask);
free(ask);
}
const char *fdisk_ask_get_query(struct fdisk_ask *ask)
{
assert(ask);
return ask->query;
}
int fdisk_ask_set_query(struct fdisk_ask *ask, const char *str)
{
assert(ask);
return !strdup_to_struct_member(ask, query, str) ? -ENOMEM : 0;
}
int fdisk_ask_get_type(struct fdisk_ask *ask)
{
assert(ask);
return ask->type;
}
int fdisk_ask_set_type(struct fdisk_ask *ask, int type)
{
assert(ask);
ask->type = type;
return 0;
}
int fdisk_do_ask(struct fdisk_context *cxt, struct fdisk_ask *ask)
{
int rc;
assert(ask);
assert(cxt);
DBG(ASK, dbgprint("asking for '%s'", ask->query));
if (!cxt->ask_cb) {
DBG(ASK, dbgprint("no ask callback specified!"));
return -EINVAL;
}
rc = cxt->ask_cb(cxt, ask, cxt->ask_data);
DBG(ASK, dbgprint("do_ask done [rc=%d]", rc));
return rc;
}
const char *fdisk_ask_number_get_range(struct fdisk_ask *ask)
{
assert(ask);
return ask->data.num.range;
}
int fdisk_ask_number_set_range(struct fdisk_ask *ask, const char *range)
{
assert(ask);
return !strdup_to_struct_member(ask, data.num.range, range) ? -ENOMEM : 0;
}
uint64_t fdisk_ask_number_get_default(struct fdisk_ask *ask)
{
assert(ask);
return ask->data.num.dfl;
}
int fdisk_ask_number_set_default(struct fdisk_ask *ask, uint64_t dflt)
{
assert(ask);
ask->data.num.dfl = dflt;
return 0;
}
uint64_t fdisk_ask_number_get_low(struct fdisk_ask *ask)
{
assert(ask);
return ask->data.num.low;
}
int fdisk_ask_number_set_low(struct fdisk_ask *ask, uint64_t low)
{
assert(ask);
ask->data.num.low = low;
return 0;
}
uint64_t fdisk_ask_number_get_high(struct fdisk_ask *ask)
{
assert(ask);
return ask->data.num.hig;
}
int fdisk_ask_number_set_high(struct fdisk_ask *ask, uint64_t high)
{
assert(ask);
ask->data.num.hig = high;
return 0;
}
uint64_t fdisk_ask_number_get_result(struct fdisk_ask *ask)
{
assert(ask);
return ask->data.num.result;
}
int fdisk_ask_number_set_result(struct fdisk_ask *ask, uint64_t result)
{
assert(ask);
ask->data.num.result = result;
return 0;
}
uint64_t fdisk_ask_number_get_base(struct fdisk_ask *ask)
{
assert(ask);
return ask->data.num.base;
}
int fdisk_ask_number_set_base(struct fdisk_ask *ask, uint64_t base)
{
assert(ask);
ask->data.num.base = base;
return 0;
}
/* if numbers are not in bytes, then specify number of bytes per the unit */
uint64_t fdisk_ask_number_get_unit(struct fdisk_ask *ask)
{
assert(ask);
return ask->data.num.unit;
}
int fdisk_ask_number_set_unit(struct fdisk_ask *ask, uint64_t unit)
{
assert(ask);
ask->data.num.unit = unit;
return 0;
}
int fdisk_ask_number_is_relative(struct fdisk_ask *ask)
{
assert(ask);
return ask->data.num.relative;
}
int fdisk_ask_number_set_relative(struct fdisk_ask *ask, int relative)
{
assert(ask);
ask->data.num.relative = relative ? 1 : 0;
return 0;
}
/*
* Generates string with list ranges (e.g. 1,2,5-8) for the 'cur'
*/
static char *mk_string_list(char *ptr, size_t *len, size_t *begin,
size_t *run, ssize_t cur)
{
int rlen;
if (cur != -1) {
if (!*begin) { /* begin of the list */
*begin = cur + 1;
return ptr;
}
if (*begin + *run == cur) { /* no gap, continue */
(*run)++;
return ptr;
}
} else if (!*begin) {
*ptr = '\0';
return ptr; /* end of empty list */
}
/* add to the list */
if (!*run)
rlen = snprintf(ptr, *len, "%zd,", *begin);
else if (*run == 1)
rlen = snprintf(ptr, *len, "%zd,%zd,", *begin, *begin + 1);
else
rlen = snprintf(ptr, *len, "%zd-%zd,", *begin, *begin + *run);
if (rlen < 0 || (size_t) rlen + 1 > *len)
return NULL;
ptr += rlen;
if (rlen > 0 && *len > (size_t) rlen)
*len -= rlen;
else
*len = 0;
if (cur == -1 && *begin) {
/* end of the list */
*(ptr - 1) = '\0'; /* remove tailing ',' from the list */
return ptr;
}
*begin = cur + 1;
*run = 0;
return ptr;
}
/* returns: 1=0 on success, < 0 on error, 1 if no free partition */
int fdisk_ask_partnum(struct fdisk_context *cxt, size_t *partnum, int wantnew)
{
int rc = 0;
char range[BUFSIZ], *ptr = range;
size_t i, len = sizeof(range), begin = 0, run = 0;
struct fdisk_ask *ask = NULL;
__typeof__(ask->data.num) *num;
assert(cxt);
assert(cxt->label);
assert(partnum);
DBG(ASK, dbgprint("%s: asking for %s partition number (max: %zd)",
cxt->label->name, wantnew ? "new" : "used",
cxt->label->nparts_max));
ask = fdisk_new_ask();
if (!ask)
return -ENOMEM;
num = &ask->data.num;
for (i = 0; i < cxt->label->nparts_max; i++) {
int status = 0;
rc = fdisk_partition_get_status(cxt, i, &status);
if (rc)
break;
if (wantnew && !(status & FDISK_PARTSTAT_USED)) {
ptr = mk_string_list(ptr, &len, &begin, &run, i);
if (!ptr) {
rc = -EINVAL;
break;
}
if (!num->low)
num->dfl = num->low = i + 1;
num->hig = i + 1;
} else if (!wantnew && (status & FDISK_PARTSTAT_USED)) {
ptr = mk_string_list(ptr, &len, &begin, &run, i);
if (!num->low)
num->low = i + 1;
num->dfl = num->hig = i + 1;
}
}
if (!rc) {
mk_string_list(ptr, &len, &begin, &run, -1); /* terminate the list */
rc = fdisk_ask_number_set_range(ask, range);
}
if (!rc && wantnew && num->low == 0 && num->hig == 0) {
DBG(ASK, dbgprint("no free partition"));
rc = 1;
}
if (!rc)
rc = fdisk_ask_set_query(ask, _("Partition number"));
if (!rc)
rc = fdisk_ask_set_type(ask, FDISK_ASKTYPE_NUMBER);
if (!rc)
rc = fdisk_do_ask(cxt, ask);
if (!rc) {
*partnum = fdisk_ask_number_get_result(ask);
if (*partnum)
*partnum -= 1;
}
fdisk_free_ask(ask);
DBG(ASK, dbgprint("result: %zd [rc=%d]\n", *partnum, rc));
return rc;
}
#ifdef TEST_PROGRAM
struct fdisk_label *fdisk_new_dos_label(struct fdisk_context *cxt) { return NULL; }
struct fdisk_label *fdisk_new_aix_label(struct fdisk_context *cxt) { return NULL; }
struct fdisk_label *fdisk_new_bsd_label(struct fdisk_context *cxt) { return NULL; }
struct fdisk_label *fdisk_new_mac_label(struct fdisk_context *cxt) { return NULL; }
struct fdisk_label *fdisk_new_sgi_label(struct fdisk_context *cxt) { return NULL; }
struct fdisk_label *fdisk_new_sun_label(struct fdisk_context *cxt) { return NULL; }
int test_ranges(struct fdisk_test *ts, int argc, char *argv[])
{
/* 1 - 3, 6, 8, 9, 11 13 */
size_t nums[] = { 1, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1 };
size_t numx[] = { 0, 0, 0 };
char range[BUFSIZ], *ptr = range;
size_t i, len = sizeof(range), begin = 0, run = 0;
for (i = 0; i < ARRAY_SIZE(nums); i++) {
if (!nums[i])
continue;
ptr = mk_string_list(ptr, &len, &begin, &run, i);
}
mk_string_list(ptr, &len, &begin, &run, -1);
printf("list: '%s'\n", range);
ptr = range;
len = sizeof(range), begin = 0, run = 0;
for (i = 0; i < ARRAY_SIZE(numx); i++) {
if (!numx[i])
continue;
ptr = mk_string_list(ptr, &len, &begin, &run, i);
}
mk_string_list(ptr, &len, &begin, &run, -1);
printf("empty list: '%s'\n", range);
return 0;
}
int main(int argc, char *argv[])
{
struct fdisk_test tss[] = {
{ "--ranges", test_ranges, "generates ranges" },
{ NULL }
};
return fdisk_run_test(tss, argc, argv);
}
#endif