getttyent, getttynam, setttyent, endttyent — get ttys file entry
#include <ttyent.h>
struct ttyent *getttyent( |
void); |
struct ttyent *getttynam( |
const char * | name); |
int
setttyent( |
void); |
int
endttyent( |
void); |
These functions provide an interface to the file
_PATH_TTYS (e.g., /etc/ttys).
The function setttyent()
opens the file or rewinds it if already open.
The function endttyent()
closes the file.
The function getttynam()
searches for a given ttyname in the file. It returns a
pointer to a struct ttyent (description below).
The function getttyent()
opens the file _PATH_TTYS (if
necessary) and returns the first entry. If the file is
already open, the next entry. The ttyent structure has the form:
struct ttyent { char * ty_name; /* terminal device name */char * ty_getty; /* command to execute, usually getty */char * ty_type; /* terminal type for termcap */int ty_status; /* status flags */char * ty_window; /* command to start up window manager */char * ty_comment; /* comment field */};
ty_status can
be:
#define TTY_ON 0x01 /* enable logins (start ty_getty program) */ #define TTY_SECURE 0x02 /* allow UID 0 to login */