osgetlogin
osgetlogin is a function in the POSIX standard used in Unix-like operating systems to retrieve the username of the current user associated with the terminal that initiated the process. It is part of the standard C library and is typically declared in the header file unistd.h. The function returns a pointer to a string containing the login name of the user as recognized by the system, or NULL if the login name cannot be determined.
The primary purpose of osgetlogin is to provide an easy way for applications to identify the current
In terms of behavior, osgetlogin may return NULL if the process is not associated with a terminal
The use of osgetlogin has declined in favor of other functions such as getlogin(), which offers similar
References include the POSIX standard documentation and system-specific man pages, which offer detailed behavior, portability considerations,