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-rw-r--r--util-linux/fdisk.c32
1 files changed, 27 insertions, 5 deletions
diff --git a/util-linux/fdisk.c b/util-linux/fdisk.c
index 296716575..288b9235f 100644
--- a/util-linux/fdisk.c
+++ b/util-linux/fdisk.c
@@ -1631,6 +1631,26 @@ read_int(sector_t low, sector_t dflt, sector_t high, sector_t base, const char *
case 'k':
scale_shift = 10; /* 1024 */
break;
+/*
+ * fdisk from util-linux 2.31 seems to round '+NNNk' and '+NNNK' to megabytes,
+ * (512-byte) sector count of the partition does not equal NNN*2:
+ *
+ * Last sector, +sectors or +size{K,M,G,T,P} (1953792-1000215215, default 1000215215): +9727k
+ * Device Boot Start End Sectors Size Id Type
+ * /dev/sdaN 1953792 1972223 18432 9M 83 Linux <-- size exactly 9*1024*1024 bytes
+ *
+ * Last sector, +sectors or +size{K,M,G,T,P} (1953792-1000215215, default 1000215215): +9728k
+ * /dev/sdaN 1953792 1974271 20480 10M 83 Linux <-- size exactly 10*1024*1024 bytes
+ *
+ * If 'k' means 1000 bytes (not 1024), then 9728k = 9728*1000 = 9500*1024,
+ * exactly halfway from 9000 to 10000, which explains why it jumps to next mbyte
+ * at this value.
+ *
+ * 'm' does not seem to behave this way: it means 1024*1024 bytes.
+ *
+ * Not sure we want to copy this. If user says he wants 1234kbyte partition,
+ * we do _exactly that_: 1234kbytes = 2468 sectors.
+ */
case 'm':
scale_shift = 20; /* 1024*1024 */
break;
@@ -1725,8 +1745,9 @@ get_existing_partition(int warn, unsigned max)
}
static int
-get_nonexisting_partition(int warn, unsigned max)
+get_nonexisting_partition(void)
{
+ const int max = 4;
int pno = -1;
unsigned i;
@@ -1748,7 +1769,7 @@ get_nonexisting_partition(int warn, unsigned max)
return -1;
not_unique:
- return get_partition(warn, max);
+ return get_partition(/*warn*/ 0, max);
}
@@ -2619,8 +2640,9 @@ new_partition(void)
"l logical (5 or over)" : "e extended"));
while (1) {
c = read_nonempty(line);
- if ((c | 0x20) == 'p') {
- i = get_nonexisting_partition(0, 4);
+ c |= 0x20; /* lowercase */
+ if (c == 'p') {
+ i = get_nonexisting_partition();
if (i >= 0)
add_partition(i, LINUX_NATIVE);
return;
@@ -2630,7 +2652,7 @@ new_partition(void)
return;
}
if (c == 'e' && !extended_offset) {
- i = get_nonexisting_partition(0, 4);
+ i = get_nonexisting_partition();
if (i >= 0)
add_partition(i, EXTENDED);
return;