Replicate htop's process list/tree options

[singalen]

Describe the feature request

What is the feature of interest? Be clear and concise.

htop has a bunch of coloring features that make navigating a large process tree easier:

• "Shadow other users' processes": draw them in a more dim gray color;
• "Hide kernel threads" (on by default): only show userspace threads/processes;
• "Hide userland process threads": only show processes;
• "Display threads in a different color": helps distinguish threads and only pay attention to processes;
• "Show custom thread names": useful when processes care to set meaningful thread names;
• "Show program path" - helps to locate the exact executable for a process;
• "Highlight program "basename": really helps with a mile-long commands;
• "Update process names on every refresh": probably useful for processes that do exec().

Additional context/details

I hope the option names are self-explanatory and the demand for them proven by their existence in htop.
Sorry for partially duplicating #228.

[fosskers]

Especially hiding kernel threads and highlighting base names.

[rallyram]

htop's can also show a processes' open file handles, which can be handy

[q3cpma]

Some other stuff missing:

• nice, ionice/cgroup/OOM score (Linux only), swap, etc... Full list from htop itself:

Available Columns
PID - Process/thread ID
STATE - Process state (S sleeping, R running, D disk, Z zombie, T traced, W paging, I idle)
PPID - Parent process ID
PGRP - Process group ID
SESSION - Process's session ID
TTY - Controlling terminal
TPGID - Process ID of the fg process group of the controlling terminal
MINFLT - Number of minor faults which have not required loading a memory page from disk
CMINFLT - Children processes' minor faults
MAJFLT - Number of major faults which have required loading a memory page from disk
CMAJFLT - Children processes' major faults
UTIME - User CPU time - time the process spent executing in user mode
STIME - System CPU time - time the kernel spent running system calls for this process
CUTIME - Children processes' user CPU time
CSTIME - Children processes' system CPU time
PRIORITY - Kernel's internal priority for the process
NICE - Nice value (the higher the value, the more it lets other processes take priority)
STARTTIME - Time the process was started
PROCESSOR - Id of the CPU the process last executed on
M_VIRT - Total program size in virtual memory
M_RESIDENT - Resident set size, size of the text and data sections, plus stack usage
M_SHARE - Size of the process's shared pages
M_TRS - Size of the .text segment of the process (CODE)
M_DRS - Size of the .data segment plus stack usage of the process (DATA)
M_LRS - The library size of the process (calculated from memory maps)
ST_UID - User ID of the process owner
PERCENT_CPU - Percentage of the CPU time the process used in the last sampling
PERCENT_MEM - Percentage of the memory the process is using, based on resident memory size
USER - Username of the process owner (or user ID if name cannot be determined)
TIME - Total time the process has spent in user and system time
NLWP - Number of threads in the process
TGID - Thread group ID (i.e. process ID)
PERCENT_NORM_CPU - Normalized percentage of the CPU time the process used in the last sampling (normalized by cpu count)
ELAPSED - Time since the process was started
SCHEDULERPOLICY - Current scheduling policy of the process
RCHAR - Number of bytes the process has read
WCHAR - Number of bytes the process has written
SYSCR - Number of read(2) syscalls for the process
SYSCW - Number of write(2) syscalls for the process
RBYTES - Bytes of read(2) I/O for the process
WBYTES - Bytes of write(2) I/O for the process
CNCLWB - Bytes of cancelled write(2) I/O
IO_READ_RATE - The I/O rate of read(2) in bytes per second for the process
IO_WRITE_RATE - The I/O rate of write(2) in bytes per second for the process
IO_RATE - Total I/O rate in bytes per second
CGROUP - Which cgroup the process is in
OOM - OOM (Out-of-Memory) killer score
IO_PRIORITY - I/O priority
M_PSS - proportional set size, same as M_RESIDENT but each page is divided by the number of processes sharing it
M_SWAP - Size of the process's swapped pages
M_PSSWP - shows proportional swap share of this mapping, unlike "Swap", this does not take into account swapped out page of underlying shmem objects
CTXT - Context switches (incremental sum of voluntary_ctxt_switches and nonvoluntary_ctxt_switches)
SECATTR - Security attribute of the process (e.g. SELinux or AppArmor)
COMM - comm string of the process from /proc/[pid]/comm
EXE - Basename of exe of the process from /proc/[pid]/exe
CWD - The current working directory of the process
AUTOGROUP_ID - The autogroup identifier of the process
AUTOGROUP_NICE - Nice value (the higher the value, the more other processes take priority) associated with the process autogroup
CCGROUP - Which cgroup the process is in (condensed to essentials)
CONTAINER - Name of the container the process is in (guessed by heuristics)
M_PRIV - The private memory size of the process - resident set size minus shared memory

• A more detailed/shorter state column following what most ps implementations give.