GETPASS(3) Library Routines GETPASS(3)
getpass - get a password
char *getpass (const char *prompt);
The getpass function displays a prompt to, and reads in a password
from, .tty. If this device is not accessible, getpass displays the
prompt on the standard error output and reads from the standard input.
The password may be up to _PASSWORD_LEN (currently 128) characters in
length. Any additional characters and the terminating newline charac-
ter are discarded.
Getpass turns off character echoing while reading the password.
Getpass returns a pointer to the null terminated password.
A getpass function appeared in Version 7 AT&T UNIX.
The getpass function leaves its result in an internal static object and
returns a pointer to that object. Subsequent calls to getpass will
modify the same object.
The calling process should zero the password as soon as possible to
avoid leaving the cleartext password visible in the process's address
Upon receipt of a SIGTSTP, the input buffer will be flushed, so any
partially typed password must be retyped when the process continues.
GNO 25 February 1997 GETPASS(3)
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