procexists - see if process exists

SYNOPSIS

<procexists $pid>

DESCRIPTION
For each process id in $pid, the procexists function returns 1 if the process exists, 0 if not.

DIAGNOSTICS
The procexists function returns 1 if the process exists, or 0 if not, for each $pid.

CAVEATS
The procexists function was added in version 2.1.900900000 19980720.

Although a process id is unique among currently-running processes, it may be re-used eventually once a process exits.

SEE ALSO
sysinfo, getpid, kill