02-02-2008
little help needed..
hi everyone i'm a noob trying to learn unix language.. but seems like i got no leads on how to start..
i'm playing with the 'ps' command.. i'm trying to show the pid, ppid, username, command, cpu utilization (in desc order), process start time and process status.. all in a command.. am i able to do that..? cos i've been trying for days and cant really 'read' the manual..
any help or advice would be appreciated.. thanks..
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CDPLAY(1) General Commands Manual CDPLAY(1)
NAME
cdplay - play audio compact disks
SYNOPSIS
cdplay [ -a]|[-r]
DESCRIPTION
Cdplay is an audio-cdplayer it can be used interactively or non-interactively. With no flags cdplay is used interactively. When used inter-
actively cdplay can be either in non-playing or playing mode. In non-playing mode you can select tracks to be played. In playing mode
cdplay shows the track-time, remaining track-time, total-time and remaining total-time. Cdplay assumes the drive to be at /dev/cd0.
During non-playing mode the following commands are available:
cursor-up/down
browse through the track-list
spacebar
add track to the play-list
backspace
remove a track from the play-list
s start playing the tracks in the play-list. When the play-list is empty start playing from the current position in the track-list
until the end of the cd
p play the track on the current position in the track-list
r play all tracks in a random order (shuffle play)
e exit cdplay
During playing mode the following commands are available:
s stop playing, return to non-playing mode
spacebar
pause/resume current track
cursor-up/down
skip to next/previous track
OPTIONS
When one of these options is used cdplay does everything in the background.
-a Play all tracks, cdplay tells the drive to play all tracks and then it immediately returns to the user
-r Play all tracks in random order (shuffle play). Cdplay forks of a new process which starts up a track, during that track it sleeps.
When the track is finished it wakes up to start the next track and goes to sleep again. The parent process immediately returns to
the user.
BUGS
Cdplay does not sense if a cd has changed, so don't switch cd's. If you want to play another cd you have to insert the new cd and start
cdplay again.
AUTHOR
Michel R. Prevenier (mrpreve@cs.vu.nl)
CDPLAY(1)