NAME

       program_invocation_name,  program_invocation_short_name  -  obtain  name  used  to  invoke
       calling program

SYNOPSIS

       #define _GNU_SOURCE         /* See feature_test_macros(7) */
       #include <errno.h>

       extern char *program_invocation_name;
       extern char *program_invocation_short_name;

DESCRIPTION

       program_invocation_name contains the name that was used to  invoke  the  calling  program.
       This  is the same as the value of argv[0] in main(), with the difference that the scope of
       program_invocation_name is global.

       program_invocation_short_name contains the basename component of name  that  was  used  to
       invoke  the  calling  program.   That is, it is the same value as program_invocation_name,
       with all text up to and including the final slash (/), if any, removed.

       These variables are automatically initialized by the glibc run-time startup code.

CONFORMING TO

       These variables are GNU extensions, and should not be used  in  programs  intended  to  be
       portable.

NOTES

       The Linux-specific /proc/[number]/cmdline file provides access to similar information.

SEE ALSO

       proc(5)

COLOPHON

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