.\" Copyright (c) 1992, 1993
.\" The Regents of the University of California. All rights reserved.
.\" This code is derived from software developed by the Computer Systems
.\" Engineering group at Lawrence Berkeley Laboratory under DARPA contract
.\" BG 91-66 and contributed to Berkeley.
.\" %sccs.include.redist.man%
.\" @(#)kvm_getprocs.3 8.1 (Berkeley) %G%
.Nd access user process state
.Fd #include <sys/kinfo.h>
.Fd #include <sys/kinfo_proc.h>
.Fn kvm_getprocs "kvm_t *kd" "int op" "int arg" "int *cnt"
.Fn kvm_getargv "kvm_t *kd" "const struct kinfo_proc *p" "int nchr"
.Fn kvm_getenvv "kvm_t *kd" "const struct kinfo_proc *p" "int nchr"
returns a (sub-)set of active processes in the kernel indicated by
arguments constitute a predicate which limits the set of processes
describes the filtering predicate as follows:
.Bl -tag -width 20n -offset indent -compact
processes with process id
processes with process group
.It Sy KINFO_PROC_SESSION
processes with effective user id
processes with real user id
The number of processes found is returned in the reference parameter
The processes are returned as a contiguous array of kinfo_proc structures.
This memory is locally allocated, and subsequent calls to
will overwrite this storage.
returns a null-terminated argument vector that corresponds to the
command line arguments passed to process indicated by
Most likely, these arguments correspond to the values passed to
on process creation. This information is, however,
deliberately under control of the process itself.
Note that the original command name can be found, unaltered,
in the p_comm field of the process structure returned by
argument indicates the maximum number of characters, including null bytes,
to use in building the strings. If this amount is exceeded, the string
causing the overflow is truncated and the partial result is returned.
This is handy for programs like
that print only a one line summary of a command and should not copy
out large amounts of text only to ignore it.
is zero, no limit is imposed and all argument strings are returned in
The memory allocated to the argv pointers and string storage
is owned by the kvm library. Subsequent
calls will clobber this storage.
but returns the vector of environment strings. This data is
also alterable by the process.
These routines do not belong in the kvm interface.