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diff --git a/man3/ttyslot.3 b/man3/ttyslot.3 deleted file mode 100644 index 358ae5584..000000000 --- a/man3/ttyslot.3 +++ /dev/null @@ -1,169 +0,0 @@ -'\" t -.\" Copyright (C) 2002 Andries Brouwer <aeb@cwi.nl> -.\" -.\" SPDX-License-Identifier: Linux-man-pages-copyleft -.\" -.\" This replaces an earlier man page written by Walter Harms -.\" <walter.harms@informatik.uni-oldenburg.de>. -.\" -.TH ttyslot 3 (date) "Linux man-pages (unreleased)" -.SH NAME -ttyslot \- find the slot of the current user's terminal in some file -.SH LIBRARY -Standard C library -.RI ( libc ", " \-lc ) -.SH SYNOPSIS -.nf -.BR "#include <unistd.h>" " /* See NOTES */" -.P -.B "int ttyslot(void);" -.fi -.P -.RS -4 -Feature Test Macro Requirements for glibc (see -.BR feature_test_macros (7)): -.RE -.P -.BR ttyslot (): -.nf - Since glibc 2.24: - _DEFAULT_SOURCE - From glibc 2.20 to glibc 2.23: - _DEFAULT_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500) - glibc 2.19 and earlier: - _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500) -.fi -.SH DESCRIPTION -The legacy function -.BR ttyslot () -returns the index of the current user's entry in some file. -.P -Now "What file?" you ask. -Well, let's first look at some history. -.SS Ancient history -There used to be a file -.I /etc/ttys -in UNIX\ V6, that was read by the -.BR init (1) -program to find out what to do with each terminal line. -Each line consisted of three characters. -The first character was either \[aq]0\[aq] or \[aq]1\[aq], -where \[aq]0\[aq] meant "ignore". -The second character denoted the terminal: \[aq]8\[aq] stood for "/dev/tty8". -The third character was an argument to -.BR getty (8) -indicating the sequence of line speeds to try (\[aq]\-\[aq] was: start trying -110 baud). -Thus a typical line was "18\-". -A hang on some line was solved by changing the \[aq]1\[aq] to a \[aq]0\[aq], -signaling init, changing back again, and signaling init again. -.P -In UNIX\ V7 the format was changed: here the second character -was the argument to -.BR getty (8) -indicating the sequence of line speeds to try (\[aq]0\[aq] was: cycle through -300-1200-150-110 baud; \[aq]4\[aq] was for the on-line console DECwriter) -while the rest of the line contained the name of the tty. -Thus a typical line was "14console". -.P -Later systems have more elaborate syntax. -System V-like systems have -.I /etc/inittab -instead. -.SS Ancient history (2) -On the other hand, there is the file -.I /etc/utmp -listing the people currently logged in. -It is maintained by -.BR login (1). -It has a fixed size, and the appropriate index in the file was -determined by -.BR login (1) -using the -.BR ttyslot () -call to find the number of the line in -.I /etc/ttys -(counting from 1). -.SS The semantics of ttyslot -Thus, the function -.BR ttyslot () -returns the index of the controlling terminal of the calling process -in the file -.IR /etc/ttys , -and that is (usually) the same as the index of the entry for the -current user in the file -.IR /etc/utmp . -BSD still has the -.I /etc/ttys -file, but System V-like systems do not, and hence cannot refer to it. -Thus, on such systems the documentation says that -.BR ttyslot () -returns the current user's index in the user accounting data base. -.SH RETURN VALUE -If successful, this function returns the slot number. -On error (e.g., if none of the file descriptors 0, 1, or 2 is -associated with a terminal that occurs in this data base) -it returns 0 on UNIX\ V6 and V7 and BSD-like systems, -but \-1 on System V-like systems. -.SH ATTRIBUTES -For an explanation of the terms used in this section, see -.BR attributes (7). -.TS -allbox; -lbx lb lb -l l l. -Interface Attribute Value -T{ -.na -.nh -.BR ttyslot () -T} Thread safety MT-Unsafe -.TE -.SH VERSIONS -The utmp file is found in various places on various systems, such as -.IR /etc/utmp , -.IR /var/adm/utmp , -.IR /var/run/utmp . -.SH STANDARDS -None. -.SH HISTORY -SUSv1; marked as LEGACY in SUSv2; removed in POSIX.1-2001. -SUSv2 requires \-1 on error. -.P -The glibc2 implementation of this function reads the file -.BR _PATH_TTYS , -defined in -.I <ttyent.h> -as "/etc/ttys". -It returns 0 on error. -Since Linux systems do not usually have "/etc/ttys", it will -always return 0. -.P -On BSD-like systems and Linux, the declaration of -.BR ttyslot () -is provided by -.IR <unistd.h> . -On System V-like systems, the declaration is provided by -.IR <stdlib.h> . -Since glibc 2.24, -.I <stdlib.h> -also provides the declaration with the following -feature test macro definitions: -.P -.in +4n -.EX -(_XOPEN_SOURCE >= 500 || - (_XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED)) - && ! (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) -.EE -.in -.P -Minix also has -.IR fttyslot ( fd ). -.\" .SH HISTORY -.\" .BR ttyslot () -.\" appeared in UNIX V7. -.SH SEE ALSO -.BR getttyent (3), -.BR ttyname (3), -.BR utmp (5) |