endttyent3
Get ttys file entry
Part of getttyent(3).
Usage
#include <ttyent.h>
struct ttyent *getttyent(void); struct ttyent *getttynam(const char *name);
int setttyent(void); int endttyent(void);
Library
Standard C library (libc, -lc)
Overview
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 terminal name in the file. It returns a pointer to a ttyent structure (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 */
Attributes
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| getttyent(), setttyent(), endttyent(), getttynam() | Thread safety | MT-Unsafe race:ttyent |
Notes
Under Linux, the file /etc/ttys, and the functions described above, are not used.
Releases
12 releases since Debian 3.1 (Sarge); the text changed 11 times.