Provided by: runit_2.0.0-1ubuntu4_i386 bug

NAME

       chpst - runs a program with a changed process state

SYNOPSIS

       chpst  [-vP012]  [-u user] [-U user] [-e dir] [-/ root] [-n inc] [-l|-L
       lock] [-m bytes] [-d bytes] [-o n] [-p n] [-f bytes] [-c bytes] prog

DESCRIPTION

       prog consists of one or more arguments.

       chpst changes the process state according to  the  given  options,  and
       runs prog.

OPTIONS

       -u [:]user[:group]
              setuidgid.   Set uid and gid to the user’s uid and gid, as found
              in /etc/passwd.  If user is followed by a colon and a group, set
              the  gid  to  group’s  gid,  as  found in /etc/group, instead of
              user’s gid.  If group consists  of  a  colon-separated  list  of
              group  names, chpst sets the group ids of all listed groups.  If
              user is prefixed with a colon, the user and all group  arguments
              are  interpreted  as uid and gids respectivly, and not looked up
              in the password or group file.  All initial supplementary groups
              are removed.

       -U [:]user[:group]
              envuidgid.   Set  the environment variables $UID and $GID to the
              user’s uid and  gid,  as  found  in  /etc/passwd.   If  user  is
              followed by a colon and a group, set $GID to the group’s gid, as
              found in /etc/group, instead of user’s gid.  If user is prefixed
              with  a  colon,  the user and group arguments are interpreted as
              uid and gid respectivly, and not looked up in  the  password  or
              group file.

       -e dir envdir.  Set various environment variables as specified by files
              in the directory dir: If dir contains a file named k whose first
              line  is  v,  chpst  removes  the  environment  variable k if it
              exists, and then adds the environment variable k with the  value
              v.   The  name k must not contain =.  Spaces and tabs at the end
              of v are removed, and nulls in v are changed  to  newlines.   If
              the   file  k  is  empty  (0  bytes  long),  chpst  removes  the
              environment variable k  if  it  exists,  without  adding  a  new
              variable.

       -/ root
              chroot.  Change the root directory to root before starting prog.

       -n inc nice.  Add inc to the nice(2) value before starting  prog.   inc
              must be an integer, and may start with a minus or plus.

       -l lock
              lock.   Open  the file lock for writing, and obtain an exclusive
              lock on it.  lock will be created if it does not exist.  If lock
              is  locked  by  another  process,  wait  until a new lock can be
              obtained.

       -L lock
              The same as -l, but  fail  immediately  if  lock  is  locked  by
              another process.

       -m bytes
              limit  memory.   Limit  the  data segment, stack segment, locked
              physical pages, and total of all segment per  process  to  bytes
              bytes each.

       -d bytes
              limit data segment.  Limit the data segment per process to bytes
              bytes.

       -o n   limit open files.  Limit the number of open file descriptors per
              process to n.

       -p n   limit processes.  Limit the number of processes per uid to n.

       -f bytes
              limit output size.  Limit the output file size to bytes bytes.

       -c bytes
              limit core size.  Limit the core file size to bytes bytes.

       -v     verbose.   Print  verbose  messages  to  standard  error.   This
              includes warnings about limits unsupported by the system.

       -P     pgrphack.  Run prog in a new process group.

       -0     Close standard input before starting prog.

       -1     Close standard output before starting prog.

       -2     Close standard error before starting prog.

EXIT CODES

       chpst exits 100 when called with wrong options.   It  prints  an  error
       message  and  exits  111  if it has trouble changing the process state.
       Otherwise its exit code is the same as that of prog.

EMULATION

       If chpst is called as envdir, envuidgid, pgrphack, setlock,  setuidgid,
       or  softlimit, it emulates the functionality of these programs from the
       daemontools package respectively.

SEE ALSO

       sv(8),  runsv(8),  setsid(2),  runit(8),  runit-init(8),   runsvdir(8),
       runsvchdir(8)

        http://smarden.org/runit/
        http://cr.yp.to/daemontools.html

AUTHOR

       Gerrit Pape <pape@smarden.org>

                                                                      chpst(8)