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28 .\" @(#)getttyent.3 8.1 (Berkeley) 6/4/93
29 .\" $FreeBSD: src/lib/libc/gen/getttyent.3,v 1.15 2007/01/09 00:27:54 imp Exp $
31 .Dd September 20, 2023
51 .Fn getttynam "const char *name"
57 .Fn isdialuptty "const char *name"
59 .Fn isnettty "const char *name"
66 each return a pointer to an object, with the following structure,
67 containing the broken-out fields of a line from the tty description
71 char *ty_name; /* terminal device name */
72 char *ty_getty; /* command to execute, usually getty */
73 char *ty_type; /* terminal type for termcap */
74 int ty_status; /* status flags */
75 char *ty_window; /* command to start up window manager */
76 char *ty_comment; /* comment field */
77 char *ty_group; /* tty group name */
81 The fields are as follows:
82 .Bl -tag -width ".Fa ty_comment"
84 The name of the character-special file.
86 The name of the command invoked by
88 to initialize tty line characteristics.
90 The name of the default terminal type connected to this tty line.
92 A mask of bit fields which indicate various actions allowed on this
94 The possible flags are as follows:
95 .Bl -tag -width ".Dv TTY_IFCONSOLE"
99 will start the command referenced by
103 Allow users with a uid of 0 to login on this terminal.
105 Identifies a tty as a dialin line.
106 If this flag is set, then
108 will return a non-zero value.
110 Identifies a tty used for network connections.
111 If this flag is set, then
113 will return a non-zero value.
115 Only enables a tty if it's the console.
117 Only enables a tty if it exists.
120 The command to execute for a window system associated with the line.
122 A group name to which the tty belongs.
123 If no group is specified in the ttys description file,
124 then the tty is placed in an anonymous group called
127 Any trailing comment field, with any leading hash marks
129 or whitespace removed.
132 If any of the fields pointing to character strings are unspecified,
133 they are returned as null pointers.
136 will be zero if no flag values are specified.
140 for a more complete discussion of the meaning and usage of the
146 reads the next line from the ttys file, opening the file if necessary.
150 rewinds the file if open, or opens the file if it is unopened.
154 closes any open files.
159 searches from the beginning of the file until a matching
170 return a null pointer on
178 return 0 on failure and 1 on success.
184 return non-zero if the dialup or network flag is set for the
185 tty entry relating to the tty named by the argument, and
188 .Bl -tag -width ".Pa /etc/ttys" -compact
205 functions appeared in
208 These functions use static data storage;
209 if the data is needed for future use, it should be
210 copied before any subsequent calls overwrite it.