MirOS Manual: pkg_add(1)

PKG_ADD(1)                   BSD Reference Manual                   PKG_ADD(1)

NAME

     pkg_add - install software package distributions

SYNOPSIS

     pkg_add [-fIMNnqRSv] [-d mode] [-p prefix] [-t template] pkg-name [...]

DESCRIPTION

     The pkg_add command is used to extract packages that have been previously
     created with the pkg_create(1) command. Selected packages containing
     pre-compiled applications from MirPorts can be found on the MirOS FTP
     site or on the official MirOS CD. These packages are provided as a con-
     venience for quickly installing software that would otherwise need to be
     built manually.

           Note: System distribution files, e.g. base10.ngz, etc10.ngz, etc.,
           are not packages and may not be installed using pkg_add.

     Package names may be specified as filenames (which normally consist of
     the package name itself plus the ".tgz", ".tar.gz", or ".tar" suffix) or
     an FTP location in the form of an URL. For example, the following is
     valid:

     pkg_add -v https://www.mirbsd.org/Pkgs/v10/i386/joe-3.1jupp9-0.cgz

     If the given package names are not found in the current working directo-
     ry, pkg_add will search for them in each directory named by the PKG_PATH
     environment variable. Specifying '-' as a package name causes pkg_add to
     read from the standard input.

     Alternatively, it is possible to add packages interactively from within
     the ftp client. For example, the following works:

             $ ftp ftp://ftp.openbsd.org/pub/OpenBSD/2.7/packages/i386/
             250 CWD command successful
             ftp> ls m*
             227 Entering Passive Mode (129,128,5,191,164,73)
             150 Opening ASCII mode data connection for m*.
             m4-1.4.tgz
             metamail-2.7.tgz
             mh-6.8.4.tgz
             mm-1.0.12.tgz
             mpeg_lib-1.2.1.tgz
             mpeg_play-2.4.tgz
             mpg123-0.59q.tgz
             mutt-0.95.7i.tgz
             226 Transfer complete.
             ftp> get m4-1.4.tgz "|pkg_add -v -"

     Warning: Since the pkg_add command may execute scripts or programs con-
     tained within a package file, your system may be susceptible to "trojan
     horses" or other subtle attacks from miscreants who create dangerous
     packages. Be sure the specified package(s) are from trusted sources.

     The options are as follows:

     -d      Use the displaying mode for showing messages:

             e       Use the environment variable PAGER to determine the pager
                     programme, or more(1) if undefined.

             m       more(1) is the pager.

             l       less(1) is the pager. This implies a stop (waiting for q)
                     on every port.
             c       cat(1) is the pager. This is the default behaviour. It
                     should only be used for bulk unattended installs.

     -v      Turn on verbose output.

     -I      If an installation script exists for a given package, do not exe-
             cute it.

     -N      Do not make backups of existing files.

     -n      Don't actually install a package, just report the steps that
             would be taken if it was.

     -q      This option is internally used by pkg_upgrade(1).

     -R      Do not record the installation of a package. This means that you
             cannot deinstall it later, so only use this option if you know
             what you are doing!

     -f      Force installation to proceed even if prerequisite packages are
             not installed or the requirements script fails. Although pkg_add
             will still try to find and auto-install missing prerequisite
             packages, a failure to find one will not be fatal.

     -p prefix
             Set prefix as the directory in which to extract files from a
             package. If a package has set its default directory, it will be
             overridden by this flag. Note that only the first @cwd directive
             will be replaced, since pkg_add has no way of knowing which
             directory settings are relative and which are absolute. It is
             rare in any case to see more than one directory transition made,
             but when such does happen and you wish to have control over all
             directory transitions, then you may then wish to look into the
             use of MASTER and SLAVE modes (see the -M and -S options).

     -t template
             Use template as the input to mkdtemp(3) when creating a "staging
             area". By default, this is the string /var/tmp/instmp.XXXXXX, but
             it may be necessary to override it (see CAVEATS). Be sure to
             leave some number of "X" characters for mkdtemp(3) to fill in
             with a unique ID.

             You can get a performance boost by setting the staging area
             template to reside on the same disk partition as target direc-
             tories for package file installation; often this is /usr.

     -M      Run in MASTER mode. This is a very specialized mode for running
             pkg_add and is meant to be run in conjunction with SLAVE mode.
             When run in this mode, pkg_add does no work beyond extracting the
             package into a temporary staging area (see the -t option), read-
             ing in the packing list, and then dumping it (prefaced by the
             current staging area) to the standard output where it may be fil-
             tered by a program such as sed(1). When used in conjunction with
             SLAVE mode, it allows you to make radical changes to the package
             structure before acting on its contents.

     -S      Run in SLAVE mode. This is a very specialized mode for running
             pkg_add and is meant to be run in conjunction with MASTER mode.
             When run in this mode, pkg_add expects the release contents to be
             already extracted and waiting in the staging area, the location
             of which is read as a string from the standard input. The com-
             plete packing list is also read from stdin, and the contents then
             acted on as normal.

     By default, when adding packages via FTP, the ftp(1) program operates in
     "passive" mode. If you wish to use active mode instead, set the FTPMODE
     environment variable to "active". If pkg_add consistently fails to fetch
     a package from a site known to work, it may be because the site does not
     support passive mode ftp correctly. This is very rare since pkg_add will
     try active mode ftp if the server refuses a passive mode connection.

Technical details

     pkg_add extracts each package's "packing list" into a special staging
     directory in /var/tmp (or PKG_TMPDIR if set - see CAVEATS section) and
     then runs through the following sequence to fully extract the contents of
     the package:

     1.   A check is made to determine if the package is already recorded as
          installed. If it is, installation is terminated.

     2.   A check is made to determine if the package conflicts (from @pkgcfl
          directives, see pkg_create(1)) with an already recorded as installed
          package. If it is, installation is terminated.

     3.   All package dependencies (from @pkgdep directives, see
          pkg_create(1)) are read from the packing list. If any of these re-
          quired packages are not currently installed, an attempt is made to
          find and install it; if the missing package cannot be found or in-
          stalled, the installation is terminated.

     4.   A staging area is created under /var/tmp, and the package is ex-
          tracted into the staging area.

     5.   If the package contains a require script (see pkg_create(1)), it is
          executed with the following arguments:

          pkg-name      The name of the package being installed

          INSTALL       Keyword denoting to the script that it is to run an
                        installation requirements check (the keyword is useful
                        only to scripts which serve multiple functions).

          If the require script exits with a non-zero status code, the instal-
          lation is terminated.

     6.   If the package contains an install script, it is executed with the
          following arguments:

          pkg-name      The name of the package being installed.

          PRE-INSTALL   Keyword denoting that the script is to perform any ac-
                        tions needed before the package is installed.

          If the install script exits with a non-zero status code, the instal-
          lation is terminated.

     7.   The packing list is used as a guide for moving (or copying, as
          necessary) files from the staging area into their final locations.

     8.   If the package contains an mtreefile file (see pkg_create(1)), then
          mtree is invoked as:

                mtree -u -f mtreefile -d -e -p prefix

          where prefix is either the prefix specified with the -p flag or, if
          no -p flag was specified, the name of the first directory named by a
          @cwd directive within this package.

     9.   If an install script exists for the package, it is executed with the
          following arguments:

          pkg_name      The name of the package being installed.

          POST-INSTALL  Keyword denoting that the script is to perform any ac-
                        tions needed after the package has been installed.

     10. After installation is complete, a copy of the packing list, deinstall
          script, description, and display files are copied into
          /var/db/pkg/<pkg-name> for subsequent possible use by pkg_delete(1).
          Any package dependencies are recorded in the other packages'
          /var/db/pkg/<other-pkg>/+REQUIRED_BY file (if the environment vari-
          able PKG_DBDIR is set, this overrides the /var/db/pkg/ path shown
          above).

     11. Finally, the staging area is deleted and the program terminates.

     The install and require scripts are called with the environment variable
     PKG_PREFIX set to the installation prefix (see the -p option above). This
     allows a package author to write a script that reliably performs some ac-
     tion on the directory where the package is installed, even if the user
     might change it with the -p flag to pkg_add.

ENVIRONMENT

     PKG_PATH      If a given package name cannot be found, the directories
                   named by PKG_PATH are searched. It should contain a series
                   of entries separated by colons. Each entry consists of a
                   directory name. The current directory may be indicated im-
                   plicitly by an empty directory name, or explicitly by a
                   single period ('.').

     PKG_DBDIR     Where to register packages instead of /var/db/pkg.

     PKG_REFCNTDB  Name of the file that contains the reference count database
                   for directories. The default is PKG_DBDIR/shareddirs.db.

     PKG_TMPDIR    Temporary area where packages will be extracted, instead of
                   /var/tmp.

SEE ALSO

     pkg_create(1), pkg_delete(1), pkg_info(1), mkdtemp(3), sysconf(3),
     mtree(8)

AUTHORS

     Jordan Hubbard
             Initial work and ongoing development.
     John Kohl
             NetBSD refinements.
     Thorsten Glaser
             MirOS adaptions.
             rcdb(3) based shared directory counting implementation.

CAVEATS

     Package extraction does need a temporary area that:
     •   is big enough to hold the complete extracted package,
     •   can hold executable scripts.

     pkg_add looks through PKG_TMPDIR, TMPDIR, /var/tmp, /tmp for such an
     area, in sequence.

     If TMPDIR and /var/tmp are mounted noexec, you must set PKG_TMPDIR to a
     suitable area, as pkg_add has no way to check for noexec status except by
     failing to run installation scripts.

     Starting from MirOS #8, package tools generate SVR4 CPIO archives with
     CRC by default. These files usually have the extension .cgz, but .tgz is
     also possible. If compressed with LZMA, they are called .clz or .cxz
     (LZMA2). Uncompressed packages ending in .cpio and .tar are also allowed,
     for debugging, or slow platforms where the package is later compressed on
     a fast machine.

BUGS

     Hard links between files in a distribution are only preserved if either
     (1) the staging area is on the same file system as the target directory
     of all the links to the file, or (2) all the links to the file are brack-
     eted by @cwd directives in the contents file, and the link names are ex-
     tracted with a single tar(1) command (not split between invocations due
     to exec argument-space limitations; this depends on the value returned by
     sysconf(_SC_ARG_MAX)).

     Sure to be others.

MirOS BSD #10-current         November 22, 2009                              4

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