getexecname - return pathname of executable
const char *getexecname(void);
The getexecname() function returns the pathname (the first
argument of one of the exec family of functions; see
exec(2)) of the executable that started the process.
Normally this is an absolute pathname, as the majority of
commands are executed by the shells that append the command
name to the user's PATH components. If this is not an abso-
lute path, the output of getcwd(3C) can be prepended to it
to create an absolute path, unless the process or one of its
ancestors has changed its root directory or current working
directory since the last successful call to one of the exec
family of functions.
If successful, getexecname() returns a pointer to the exe-
cutables pathname; otherwise, it returns 0.
The getexecname() function obtains the executable pathname
from the AT_SUN_EXECNAME aux vector. These vectors are made
available to dynamically linked processes only.
A successful call to one of the exec family of functions
will always have AT_SUN_EXECNAME in the aux vector. The
associated pathname is guaranteed to be less than or equal
to PATH_MAX, not counting the trailing null byte that is
See attributes(5) for descriptions of the following attri-
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| MT-Level | Safe |
exec(2), getcwd(3C), attributes(5)
Man(1) output converted with