getttyent man page on 4.4BSD

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GETTTYENT(3)		 BSD Library Functions Manual		  GETTTYENT(3)

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

     #include <ttyent.h>

     struct ttyent *

     struct ttyent *
     getttynam(char *name);



     The 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 */
	     int     ty_status;	     /* flag values */
	     char    *ty_window;     /* command for window manager */
	     char    *ty_comment;    /* comment field */

     The fields are as follows:

     ty_name	 The name of the character-special file.

     ty_getty	 The name of the command invoked by init(8) to initialize tty
		 line characteristics.

     ty_type	 The name of the default terminal type connected to this tty

     ty_status	 A mask of bit fields which indicate various actions allowed
		 on this tty line.  The possible flags are as follows:

		 TTY_ON	     Enables logins (i.e., init(8) will start the com‐
			     mand referenced by ty_getty on this entry).

		 TTY_SECURE  Allow users with a uid of 0 to login on this ter‐

     ty_window	 The command to execute for a window system associated with
		 the line.

     ty_comment	 Any trailing comment field, with any leading hash marks
		 (``#'') or whitespace removed.

     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 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).

     The routines getttyent() and getttynam() return a null pointer on EOF or
     error.  The setttyent() function and endttyent() return 0 on failure and
     1 on success.


     login(1), ttyslot(3), gettytab(5), termcap(5), ttys(5), getty(8), init(8)

     The getttyent(), getttynam(), setttyent(), and endttyent() functions
     appeared in 4.3BSD.

     These functions use static data storage; if the data is needed for future
     use, it should be copied before any subsequent calls overwrite it.

4.3 Berkeley Distribution	 June 4, 1993	     4.3 Berkeley Distribution

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