GETTTYENT(3) | Library Functions Manual | GETTTYENT(3) |
getttyent
, getttynam
,
setttyent
, setttyentpath
,
endttyent
—
#include <ttyent.h>
struct ttyent *
getttyent
(void);
struct ttyent *
getttynam
(const
char *name);
int
setttyent
(void);
int
setttyentpath
(const
char *path);
int
endttyent
(void);
getttyent
(), and getttynam
()
functions each return a pointer to an object, with the following structure,
containing the broken-out fields of a line from the tty description file.
struct ttyent { char *ty_name; /* terminal device name */ char *ty_getty; /* command to execute */ char *ty_type; /* terminal type */ #define TTY_ON 0x01 /* enable logins */ #define TTY_SECURE 0x02 /* allow uid of 0 to login */ #define TTY_LOCAL 0x04 /* set 'CLOCAL' on open (dev. specific) */ #define TTY_RTSCTS 0x08 /* set 'CRTSCTS' on open (dev. specific) */ #define TTY_SOFTCAR 0x10 /* ignore hardware carrier (dev. spec.) */ #define TTY_MDMBUF 0x20 /* set 'MDMBUF' on open (dev. specific) */ #define TTY_DTRCTS 0x40 /* set 'CDTRCTS' on open (dev. specific) */ int ty_status; /* flag values */ char *ty_window; /* command for window manager */ char *ty_comment; /* comment field */ char *ty_class; /* category of tty usage */ };
The fields are as follows:
TTY_ON
TTY_SECURE
TTY_LOCAL
TTY_MDMBUF
TTY_RTSCTS
TTY_SOFTCAR
If any of the fields pointing to character strings are unspecified, they are returned as null pointers. The field ty_status will be zero if no flag values are specified.
See ttys(5) for a more complete discussion of the meaning and usage of the fields.
The getttyent
() function reads the next
line from the ttys file, opening the file if necessary. The
setttyent
() function rewinds the file if open, or
opens the file if it is unopened. The
setttyentpath
() function is equivalent to
setttyent
() but accepts an additional argument to
read the ttys information from an alternate file instead of the default
location (defined in _PATH_TTYS
). The
endttyent
() function closes any open files.
The getttynam
() function searches from the
beginning of the file until a matching name is found
(or until EOF
is encountered).
getttyent
() and
getttynam
() return a null pointer on
EOF
or error. The setttyent
()
and setttyentpath
() functions and
endttyent
() return 0 on failure and 1 on success.
getttyent
(), getttynam
(),
setttyent
(), and endttyent
()
functions appeared in 4.3BSD. The
setttyentpath
() function appeared in
NetBSD 4.0.
February 7, 2014 | NetBSD 9.2 |