GETTTYENT
Section: Linux Programmer's Manual (3)
Updated: 2017-09-15
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NAME
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:
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
|
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.
SEE ALSO
ttyname(3),
ttyslot(3)
COLOPHON
This page is part of release 4.13 of the Linux
man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
https://www.kernel.org/doc/man-pages/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- ATTRIBUTES
-
- CONFORMING TO
-
- NOTES
-
- SEE ALSO
-
- COLOPHON
-
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