PS.1
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操作系统开发
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C/C++
- PS(1) Minix Programmer's Manual PS(1)
- NAME
- ps - process status
- SYNOPSIS
- ps [-alxU] [kernel mm fs]
- OPTIONS
- -a Print all processes with controlling terminals
- -l Give long listing
- -x Include processes without a terminal
- EXAMPLES
- ps -axl # Print all processes and tasks in long format
- DESCRIPTION
- Ps prints the status of active processes. Normally only the caller's own
- processes are listed in short format (the PID, TTY, TIME and CMD fields
- as explained below). The long listing contains:
- F Kernel flags:
- 001: free slot
- 002: no memory map
- 004: sending;
- 010: receiving
- 020: inform on pending signals
- 040: pending signals
- 100: being traced.
- S
- State:
- R: runnable
- W: waiting (on a message)
- S: sleeping (i.e.,suspended on MM or FS)
- Z: zombie
- T: stopped
- UID, PID, PPID, PGRP
- The user, process, parent process and process group ID's.
- SZ
- Size of the process in kilobytes.
- RECV
- Process/task on which a receiving process is waiting or sleeping.
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- PS(1) Minix Programmer's Manual PS(1)
- TTY
- Controlling tty for the process.
- TIME
- Process' cumulative (user + system) execution time.
- CMD Command line arguments of the process.
- The files /dev/{mem,kmem} are used to read the system tables and command
- line arguments from. Terminal names in /dev are used to generate the
- mnemonic names in the TTY column, so ps is independent of terminal naming
- conventions.
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