Setttyent (3) Linux Manual Page

getttyent, getttynam, setttyent, endttyent – get ttys file entry

Synopsis

#include <ttyent.h>
struct ttyent *getttyent(void);
struct ttyent *getttynam(const char *name);
int setttyent(void);
int endttyent(void);

Description

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:

#define TTY_ON     0x01  /* enable logins (start ty_getty program) */
#define TTY_SECURE 0x02  /* allow UID 0 to login */

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

Conforming To

Not in POSIX.1. Present on the BSDs, and perhaps other systems.

Notes

Under Linux, the file /etc/ttys, and the functions described above, are not used.

Colophon

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setttyent (3) Linux Manual Page