Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com
Answertopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 

Next: , Up: Argp


25.3.2 Argp Global Variables

These variables make it easy for user programs to implement the `--version' option and provide a bug-reporting address in the `--help' output. These are implemented in argp by default.

— Variable: const char * argp_program_version

If defined or set by the user program to a non-zero value, then a `--version' option is added when parsing with argp_parse, which will print the `--version' string followed by a newline and exit. The exception to this is if the ARGP_NO_EXIT flag is used.

— Variable: const char * argp_program_bug_address

If defined or set by the user program to a non-zero value, argp_program_bug_address should point to a string that will be printed at the end of the standard output for the `--help' option, embedded in a sentence that says `Report bugs to address.'.

— Variable: argp_program_version_hook

If defined or set by the user program to a non-zero value, a `--version' option is added when parsing with arg_parse, which prints the program version and exits with a status of zero. This is not the case if the ARGP_NO_HELP flag is used. If the ARGP_NO_EXIT flag is set, the exit behavior of the program is suppressed or modified, as when the argp parser is going to be used by other programs.

It should point to a function with this type of signature:

          void print-version (FILE *stream, struct argp_state *state)
     

See Argp Parsing State, for an explanation of state.

This variable takes precedence over argp_program_version, and is useful if a program has version information not easily expressed in a simple string.

— Variable: error_t argp_err_exit_status

This is the exit status used when argp exits due to a parsing error. If not defined or set by the user program, this defaults to: EX_USAGE from <sysexits.h>.


 
 
  Published under the terms of the GNU General Public License Design by Interspire