xenial (1) g.tempfile.1grass.gz

NAME

       g.tempfile  - Creates a temporary file and prints it’s file name.

KEYWORDS

       general, support, scripts

SYNOPSIS

       g.tempfile
       g.tempfile --help
       g.tempfile [-d] pid=integer  [--help]  [--verbose]  [--quiet]  [--ui]

   Flags:
       -d
           Dry run - don’t create a file, just prints it’s file name

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       pid=integer [required]
           Process id to use when naming the tempfile

DESCRIPTION

       g.tempfile  is  designed  for  shell  scripts  that  need to use large temporary files.  GRASS provides a
       mechanism for temporary files that does not depend on /tmp. GRASS temporary files are created in the data
       base  with  the  assumption  that  there will be enough space under the data base for large files.  GRASS
       periodically removes temporary files that have been left behind by programs that failed  to  remove  them
       before terminating.

       g.tempfile creates an unique file and prints the name. The user is required to provide a process-id which
       will be used as part of the name of the file.  Most Unix shells provide a way to get the  process  id  of
       the  current  shell.  For /bin/sh and /bin/csh this is $$.  It is recommended that $$ be specified as the
       process-id for g.tempfile.

EXAMPLE

       For /bin/sh scripts the following syntax should be used:
       temp1=`g.tempfile pid=$$`
       temp2=`g.tempfile pid=$$`
       For /bin/csh scripts, the following can be used:
       set temp1=`g.tempfile pid=$$`
       set temp2=`g.tempfile pid=$$`

NOTES

       Each call to g.tempfile creates a different (i.e. unique)  name.   Although  GRASS  does  eventually  get
       around  to  removing  tempfiles  that  have  been left behind, the programmer should make every effort to
       remove these files. They often get large and take up disk space. If you write /bin/sh scripts,  learn  to
       use the /bin/sh trap command. If you write /bin/csh scripts, learn to use the /bin/csh onintr command.

AUTHOR

       Michael Shapiro, U.S. Army Construction Engineering Research Laboratory

       Last changed: $Date: 2011-11-08 22:24:20 +0100 (Tue, 08 Nov 2011) $

       Main index | General index | Topics index | Keywords index | Full index

       © 2003-2016 GRASS Development Team, GRASS GIS 7.0.3 Reference Manual