GETEXECNAME(3C)GETEXECNAME(3C)NAMEgetexecname - 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 absolute 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 work‐
ing directory since the last successful call to one of the exec family
If successful, getexecname() returns a pointer to the executables path‐
name; otherwise, it returns 0.
The getexecname() function obtains the executable pathname from the
AT_SUN_EXECNAME aux vector. These vectors are made available to dynam‐
ically 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 always present.
See attributes(5) for descriptions of the following attributes:
│ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
│MT-Level │ Safe │
SEE ALSOexec(2), getcwd(3C), attributes(5)
Dec 17, 1997 GETEXECNAME(3C)