The Apache HTTP Server provides a mechanism for storing information in named variables that are called environment variables . ... For additional flexibility, the directives provided by mod_setenvif allow environment variables to be set on a per-request basis, conditional on characteristics of particular requests. ... As discussed above, the environment passed to CGI scripts includes standard meta-information about the request in addition to any variables set within the Apache configuration. ...

... Apache HTTP Server Version 2.4 . ... Although the Apache HTTP Server provides generic error responses in the event of 4xx or 5xx HTTP status codes, these responses are rather stark, uninformative, and can be intimidating to site users. ... Additionally, a set of values are provided, so that the error document can be customized further based on the values of these variables, using Server Side Includes . ... Customizing Error Responses . ... ErrorDocument 500 http://error.example.com/server_error.html...

HOME . this is the pathname of your "home" directory when you login and to which cd changes when invoked with no argument. ... defines the directories searched when the shell is looking for the file to execute when processing a command . MAIL . if set to the name of a mail file the shell will inform you of the arrival of new mail. ... contains the shell prompt string. ... is the continuation prompt when a command spans more than one line. ...

WCSLIB љ 5.15 . ... fitshdr.h File Reference . ... fitshdr (const char header[], int nkeyrec, int nkeyids, struct fitskeyid keyids[], int *nreject, struct fitskey **keys) . ... Typically the latter may be set to remove WCS keyrecords from a header leaving fitshdr() to handle the remainder. #define FITSHDR_KEYWORDљљљ0x01 . ... Bit mask for the status flag bit-vector returned by fitshdr() indicating a keyrecord following a valid END keyrecord. #define KEYIDLENљљљ(sizeof(struct fitskeyid )/sizeof(int)) . ...

... Freshmeat page . Perl >= 5.6.0 . ... Binding functions to Perl . ... S-Lang . ... Doug's Home Page . I have written a Perl module ( Inline::SLang ) that - using the framework provided by the Perl Inline module - allows you to define S-Lang functions and call them from your Perl code. ... When the Perl code is loaded, the Inline::SLang module evaluates the S-Lang code, determines what functions and data types have been added to the S-Lang interpreter, and then binds the functions to Perl . ...

... WIP is an interactive package with a simple to use interface designed to produce high quality graphical output. WIP was developed as part of the Berkeley-Illinois-Maryland Association (BIMA) project and is available via anonymous ftp. ... Included in the WIP distribution is a complete manual which contains several sample figures with associated commands, a frequently asked questions section, and a descriptive listing of all available commands. ... Figure illustrates WIP's ability to handle images. ...

... Defining New Data Types . Unions . ... Static Variables . ... struct gun { char name[50]; int magazinesize; float calibre; }; struct gun arnies; . ... struct gun { char name[50]; int magazinesize; float calibre; } arnies; . ... typedef struct gun { char name[50]; int magazinesize; float calibre; } agun; agun arnies={"Uzi",30,7}; . ... stat() { int auto_var = 0; static int static_var = 0; printf( ``auto = %d, static = %d n'', auto_var, static_var); ++auto_var; ++static_var; } . ...