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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 $
30 .\" $DragonFly: src/lib/libc/gen/getttyent.3,v 1.2 2003/06/17 04:26:42 dillon Exp $
52 .Fn getttynam "const char *name"
58 .Fn isdialuptty "const char *name"
60 .Fn isnettty "const char *name"
67 each return a pointer to an object, with the following structure,
68 containing the broken-out fields of a line from the tty description
72 char *ty_name; /* terminal device name */
73 char *ty_getty; /* command to execute, usually getty */
74 char *ty_type; /* terminal type for termcap */
75 #define TTY_ON 0x01 /* enable logins (start ty_getty program) */
76 #define TTY_SECURE 0x02 /* allow uid of 0 to login */
77 #define TTY_DIALUP 0x04 /* is a dialup tty */
78 #define TTY_NETWORK 0x08 /* is a network tty */
79 int ty_status; /* status flags */
80 char *ty_window; /* command to start up window manager */
81 char *ty_comment; /* comment field */
82 char *ty_group; /* tty group name */
86 The fields are as follows:
87 .Bl -tag -width ty_comment
89 The name of the character-special file.
91 The name of the command invoked by
93 to initialize tty line characteristics.
95 The name of the default terminal type connected to this tty line.
97 A mask of bit fields which indicate various actions allowed on this
99 The possible flags are as follows:
100 .Bl -tag -width TTY_NETWORK
102 Enables logins (i.e.,
104 will start the command referenced by
108 Allow users with a uid of 0 to login on this terminal.
110 Identifies a tty as a dialin line.
111 If this flag is set, then
113 will return a non-zero value.
115 Identifies a tty used for network connections.
116 If this flag is set, then
118 will return a non-zero value.
121 The command to execute for a window system associated with the line.
123 A group name to which the tty belongs.
124 If no group is specified in the ttys description file,
125 then the tty is placed in an anonymous group called "none".
127 Any trailing comment field, with any leading hash marks (``#'') or
131 If any of the fields pointing to character strings are unspecified,
132 they are returned as null pointers.
135 will be zero if no flag values are specified.
139 for a more complete discussion of the meaning and usage of the
145 reads the next line from the ttys file, opening the file if necessary.
149 rewinds the file if open, or opens the file if it is unopened.
153 closes any open files.
158 searches from the beginning of the file until a matching
169 return a null pointer on
177 return 0 on failure and 1 on success.
183 return non-zero if the dialup or network flag is set for the
184 tty entry relating to the tty named by the argument, and
187 .Bl -tag -width /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.