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getttyent(3) — Linux manual page

getttyent(3)             Library Functions Manualgetttyent(3)

NAME        top

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

LIBRARY        top

       Standard C library (libc,-lc)

SYNOPSIS        top

#include <ttyent.h>struct ttyent *getttyent(void);struct ttyent *getttynam(const char *name);int setttyent(void);int endttyent(void);

DESCRIPTION        top

       These functions provide an interface to the file_PATH_TTYS(e.g.,/etc/ttys).       The functionsetttyent() opens the file or rewinds it if already       open.       The functionendttyent() closes the file.       The functiongetttynam() searches for a given terminal name in the       file.  It returns a pointer to attyent structure (description       below).       The functiongetttyent() opens the file_PATH_TTYS(if necessary)       and returns the first entry.  If the file is already open, the       next entry.  Thettyent 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        top

       For an explanation of the terms used in this section, seeattributes(7).       ┌────────────────────────┬───────────────┬───────────────────────┐       │Interface│Attribute│Value│       ├────────────────────────┼───────────────┼───────────────────────┤       │getttyent(),           │ Thread safety │ MT-Unsafe race:ttyent │       │setttyent(),           │               │                       │       │endttyent(),           │               │                       │       │getttynam()            │               │                       │       └────────────────────────┴───────────────┴───────────────────────┘

STANDARDS        top

       BSD.

NOTES        top

       Under Linux, the file/etc/ttys, and the functions described       above, are not used.

SEE ALSO        top

ttyname(3),ttyslot(3)

COLOPHON        top

       This page is part of theman-pages (Linux kernel and C library       user-space interface documentation) project.  Information about       the project can be found at        ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report       for this manual page, see       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.       This page was obtained from the tarball man-pages-6.15.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-08-11.  If you discover any rendering problems in this HTML       version of the page, or you believe there is a better or more up-       to-date source for the page, or you have corrections or       improvements to the information in this COLOPHON (which isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2025-05-17getttyent(3)

Pages that refer to this page:ttyslot(3)

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