Commands work in the shell, but not Plumbum

[charlie-ht]

My command looks like this,

echo[partition_map] | sudo[sfdisk[self.device_path]]

Printing the command looks like

/usr/bin/echo '
label: dos
label-id: 0x7f93fbc8
device: /dev/sdc
unit: sectors

/dev/sdc1 : start=        2048, size=      614400, type=c
/dev/sdc2 : start=      616448, size=    30499840, type=83
' | /usr/bin/sudo /usr/sbin/sfdisk /dev/sdc

If I copy and paste that command into my shell, I get an exit code of zero and successful messages. If I run the Plumbum command, I get a uninformative error message, and then a stdout report that it cut off right before the first line of stderr from sfdisk. I have no idea where the exit status of -13 came from.

plumbum.commands.processes.ProcessExecutionError: Command line: ['/usr/bin/sudo', '/usr/sbin/sfdisk', '/dev/sdc']
Exit code: -13
Stdout:  | Checking that no-one is using this disk right now ... OK
         | 
         | Disk /dev/sdc: 14.9 GiB, 15931539456 bytes, 31116288 sectors
         | 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: 0x7f93fbc8
         | 
         | Old situation:
         | 
         | Device     Boot  Start      End  Sectors  Size Id Type
         | /dev/sdc1         2048   616447   614400  300M  c W95 FAT32 (LBA)
         | /dev/sdc2       616448 31116287 30499840 14.6G 83 Linux
         | 
         | >>> Script header accepted.
         | >>> Script header accepted.
         | >>> Script header accepted.
         | >>> Script header accepted.
         | >>> Created a new DOS disklabel with disk identifier 0x7f93fbc8.
         | /dev/sdc1: Created a new partition 1 of type 'W95 FAT32 (LBA)' and of size 300 MiB.

What's going on, how can the command Plumbum reports it's about to run fail to run, yet works in the shell?

[charlie-ht]

Alright, if I change the command to sudo [echo[partition_map] | sfdisk[self.device_path]] it works. That's not intuitive to me :(

[asmfreak]

You can drop echo part and use < semantic

sudo[sfdisk[self.device_path]] < partition_map