Fatresize does nothing except print version

When trying to shrink a fat16 partition, fatresize just spits out its version and does nothing.

[james@voidD620 ~]$ lsblk
NAME                MAJ:MIN RM  SIZE RO TYPE  MOUNTPOINTS
sda                   8:0    0  1.8T  0 disk  
└─sda1                8:1    0  1.8T  0 part  
  └─voidD620        254:0    0  1.8T  0 crypt 
    └─voidD620-root 254:1    0  1.8T  0 lvm   /
sdb                   8:16   1 59.1G  0 disk  
├─sdb1                8:17   1   59G  0 part  
└─sdb2                8:18   1   32M  0 part  
sr0                  11:0    1 1024M  0 rom   
[james@voidD620 ~]$ sudo fatresize -s 28M /dev/sdb2
Password: 
fatresize 1.0.3 (20200810)
[james@voidD620 ~]$ lsblk
NAME                MAJ:MIN RM  SIZE RO TYPE  MOUNTPOINTS
sda                   8:0    0  1.8T  0 disk  
└─sda1                8:1    0  1.8T  0 part  
  └─voidD620        254:0    0  1.8T  0 crypt 
    └─voidD620-root 254:1    0  1.8T  0 lvm   /
sdb                   8:16   1 59.1G  0 disk  
├─sdb1                8:17   1   59G  0 part  
└─sdb2                8:18   1   32M  0 part  
sr0                  11:0    1 1024M  0 rom   
[james@voidD620 ~]$

Disk /dev/sdb: 59.06 GiB, 63417876480 bytes, 123863040 sectors
Disk model: USB 3.0 FD      
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x1c9d51dc

Device     Boot     Start       End   Sectors Size Id Type
/dev/sdb1  *         2048 123797503 123795456  59G  7 HPFS/NTFS/exFAT
/dev/sdb2       123797504 123863039     65536  32M ef EFI (FAT-12/16/32)

[TomGoBravo]

I'm seeing the same behavior. I have fatresize 1.1.0 (20221231) installed on Linux tb270 5.18.0-0.bpo.1-amd64 #1 SMP PREEMPT_DYNAMIC Debian 5.18.2-1~bpo11+1 (2022-06-14) x86_64 GNU/Linux.

[TomGoBravo]

Have you tried running with -v -v -v? I get:

sudo fatresize -p -v -v -v -v -s 100M -p -n 1 /dev/loop9p1
fatresize 1.1.0 (20221231)
0%      (time left 00:00)ped_device_get(/dev/loop9)         
ped_device_open()
ped_disk_new()
ped_disk_get_partition(9)

The pnum 9 looks suspicious. I was expecting to see pnum as 1, either parsed from the dev path or from the -n arg.

[TomGoBravo]

I took a look at fatresize.c and tried #33 and decided to use the parted command line tool instead of putting time into tracing opt->pnum. fatresize.c appears to be mostly a frontend for ped. 🤷

[rothn]

I am also having this issue