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getttyent(3) [minix man page]

GETTTYENT(3)                                                 Linux Programmer's Manual                                                GETTTYENT(3)

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(), | Thread safety | MT-Unsafe race:ttyent | |endttyent(), getttynam() | | | +--------------------------+---------------+-----------------------+ 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 4.15 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/. GNU 2017-09-15 GETTTYENT(3)

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GETTTYENT(3)						     Linux Programmer's Manual						      GETTTYENT(3)

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
Multithreading (see pthreads(7)) The getttyent() function returns a pointer to a static variable, so it is not thread-safe. The setttyent() and endttyent() functions use a static variable, so they are not thread-safe. The getttynam() function calls thread-unsafe function getttyent() so it is not thread-safe. CONFORMING TO
Not in POSIX.1-2001. 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 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. GNU
2013-07-22 GETTTYENT(3)
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