program_invocation_name, program_invocation_short_name — obtain name used to invoke calling program
#define _GNU_SOURCE /* See feature_test_macros(7) */ #include <errno.h> extern char *program_invocation_name; extern char *program_invocation_short_name;
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.
These variables are GNU extensions, and should not be used in programs intended to be portable.
This page is part of release 4.07 of the Linux man-pages project. A
description of the project, information about reporting bugs,
and the latest version of this page, can be found at
https://www.kernel.org/doc/man−pages/.
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