Provided by: runit_2.1.2-3ubuntu1_i386 bug

NAME

       chpst - runs a program with a changed process state

SYNOPSIS

       chpst  [-vP012]  [-u  user] [-U user] [-b argv0] [-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.

       -b argv0
              argv0.  Run prog with argv0 as the 0th argument.

       -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)