Opening ps files in unix

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I'm getting curious about making some of my own commands. I know this is realtively easy with script files and combining various unix standard commands. Is there a way to view the code that is used for these standard commands.. RedHat Commands. OpenSolaris Commands. Linux Commands. SunOS Commands. FreeBSD Commands. Full Man Repository. Advanced Search. Contact Us. Forum Rules. Mark Forums Read. Thread Tools. View Public Profile for vicky Find all posts by vicky View Public Profile for cbkihong.

Identical to -s. Identical to -t and t. Identical to -u and U. The output may differ by personality. See the -f option, which -F implies. Identical to -o pid, format ,state,tname,time,command or -o pid, format ,tname,time,cmd , see -o below. The BSD O option can act like -O user-defined output format with some common fields predefined or can be used to specify sort order.

Heuristics are used to determine the behavior of this option. To ensure that the desired behavior is obtained sorting or formatting , specify the option in some other way e. When used as a formatting option, it is identical to -O , with the BSD personality. Identical to Z. Identical to -M. This option can be combined with many other UNIX-style options to add additional columns.

It also causes the command arguments to be printed. See the c option, the format keyword args , and the format keyword comm. The -y option is often useful with this. Identical to -o and --format.

Explicit width control ps opid,wchan,cmd is offered too. Use multiple -o options when in doubt. This option can only be used with -l. Identical to -o and o. Identical to -n , see -n above. It orders the processes listing according to the multilevel sort specified by the sequence of one-letter short keys k1 , k2 , The "-" reverses direction only on the key it precedes.

This is useful for examining a system where a parent process repeatedly forks off short-lived children to do work. This is derived from the name of the executable file, rather than from the argv value. Command arguments and any modifications to them see setproctitle 3 are thus not shown. This option effectively turns the args format keyword into the comm format keyword; it is useful with the -f format option and with the various BSD-style format options, which all normally display the command arguments.

See the -f option, the format keyword args , and the format keyword comm. Standard BSD ps uses this option to print a header on each page of output, but older Linux ps uses this option to totally disable the header. This version of ps follows the Linux usage of not printing the header unless the BSD personality has been selected, in which case it prints a header on each page of output. Regardless of the current personality, you can use the long options --headers and --no-headers to enable printing headers each page or disable headers entirely, respectively.

Identical to --sort. Identical to N. The namelist file is needed for a proper WCHAN display, and must match the current Linux kernel exactly for correct output.

Use this option twice for unlimited width. Identical to k. This ps does not need to be setuid kmem or have any privileges to run. Do not give this ps any special permissions. For kernels prior to 2. CPU usage is currently expressed as the percentage of time spent running during the entire lifetime of a process. This is not ideal, and it does not conform to the standards that ps otherwise conforms to. This is usually at least 20 KiB of memory that is always resident.

These processes will be destroyed by init 8 if the parent process exits. If the length of the username is greater than the length of the display column, the numeric user ID is displayed instead. Tag Description D Uninterruptible sleep usually IO R Running or runnable on run queue S Interruptible sleep waiting for an event to complete T Stopped, either by a job control signal or because it is being traced.

W paging not valid since the 2. Note that the values used in sorting are the internal values ps uses and not the "cooked" values used in some of the output format fields e. Pipe ps output into the sort 1 command if you want to sort the cooked values. For example: ps -eo pid,user,args --sort user This version of ps tries to recognize most of the keywords used in other implementations of ps. The following user-defined format specifiers may contain spaces: args , cmd , comm , command , fname , ucmd , ucomm , lstart , bsdstart , start.

Some keywords may not be available for sorting.