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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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       description of the project, and information about reporting  bugs,  can
       be found at http://man7.org/linux/man-pages/.