Initial commit

notes/env_vars

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+Make primary
+============
+ARFLAGS - flags for ar
+CC - the default C compiler
+CFLAGS - flags for cc
+FC - the default FORTRAN complier
+FFLAGS - flags for FORTRAN
+GET - the program to use for SCCS get
+GFLAGS - flags for get
+LDFLAGS - flags for the linker
+LEX - the default lexer
+LFLAGS - flags for the lexer
+MAKEFLAGS - default args for make
+MAKESHELL - shell for make
+PROJECTDIR - directory to search for SCCS files not in current directory
+YACC - the default yacc implementation
+YFLAGS - flags for yacc
+
+Environment
+===========
+BROWSER - colon-separated list of browsers to try using for URLs
+CDPATH - directories to use as a base for cd
+COLUMNS - width for terminal screen/window
+DATEMSK - template file for getdate()
+DEAD - where mailx saves partial messages; defaults to ~/dead.letter
+DISPLAY - default display for X11 programs
+EDITOR - default text editor
+ENV - a script to execute when starting sh interactively
+EXINIT - commands to execute when starting ex
+FCEDIT - the default value for sh's -e option
+HISTFILE - file for terminal history
+HISTSIZE - number of lines in the history file
+HOME - home directory
+IFS - characters used for field splitting, * expansion, and the read utility
+LD_LIBRARY_PATH - directores to search for shared objects
+LIBPATH - alternative for LD_LIBRARY_PATH
+LINENO - line number in script before executing a command
+LINES - height of terminal screen/window
+LISTER - the command mailx uses when the folders command is given
+LOGNAME - the user's login name
+LPDEST - printer to use for lp
+MAIL - the path of the user's mailbox
+MAILCHECK - how often mail should be checked by sh
+MAILPATH - where something mail-related is kept
+MAILRC - mail configuration file
+MANPATH - where man pages are
+MBOX - where mailx saves read messages
+MORE - default options for more (string of command line arguments)
+MSGVERB - message components for fmtmsg()
+OLDPWD - working directory before the last cd operation
+OPTARG - used by getopts for argument storage
+OPTERR - used by some getopts implementations for error stuff
+OPTIND - used by getopts as the index of the next argument to parse
+PAGER - the default output filter/paginator; defaults to more
+PATH - where to look for executables
+PBS_DPREFIX - default prefix for directives for qsub
+PPID - parent process ID for the current shell
+PRINTER - secondary printer to use for lp
+PS1 - interactive prompt for shell
+PS2 - continuation prompt for shell (i.e. for lines broken by \)
+PS3 - prompt used for select loops in scripts
+PS4 - prompt for script executed in debug mode
+PWD - current working directory
+RANDOM - generates a random number (from /dev/{u,}random?)
+SECONDS - amount of time current shell has been around?
+SHELL - preferrred command interpreter
+TMPDIR - location for temporary files
+TERM - terminal type for output
+TERMCAP - tells system to use termcap rather than terminfo
+TERMINFO - tells system to use terminfo rather than termcap
+TZ - timezone
+USER - alias for LOGNAME?
+VISUAL - default visual text editor (subset of EDITOR)
+
+Localization
+============
+LANG - language
+LC_ALL - locale to use
+LC_COLLATE - locate for collating order
+LC_CTYPE - locale for character handling functions
+LC_MESSAGES - language for messages
+LC_MONETARY - locale for monetary values
+LC_NUMERIC - locale for numbers
+LC_TIME - locale for date/time formatting
+NLSPATH - message catalogs
+
+Unknown (not in standard)
+=======
+These are only briefly referenced as things that compliant applications
+should avoid conflicting with. I don't know what these do.
+-------
+CHARSET
+HISTORY
+MAILER
+NPROC
+PROCLANG