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author | Indrajith K L | 2022-12-03 17:00:20 +0530 |
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committer | Indrajith K L | 2022-12-03 17:00:20 +0530 |
commit | f5c4671bfbad96bf346bd7e9a21fc4317b4959df (patch) | |
tree | 2764fc62da58f2ba8da7ed341643fc359873142f /coreutils-5.3.0-bin/man/cat1p/who.1p.txt | |
download | cli-tools-windows-master.tar.gz cli-tools-windows-master.tar.bz2 cli-tools-windows-master.zip |
Diffstat (limited to 'coreutils-5.3.0-bin/man/cat1p/who.1p.txt')
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diff --git a/coreutils-5.3.0-bin/man/cat1p/who.1p.txt b/coreutils-5.3.0-bin/man/cat1p/who.1p.txt new file mode 100644 index 0000000..e57b93a --- /dev/null +++ b/coreutils-5.3.0-bin/man/cat1p/who.1p.txt @@ -0,0 +1,296 @@ +who(P) who(P) + + + + + +NAME + who - display who is on the system + +SYNOPSIS + who [-mTu] + + + + who [-mu]-s[-bHlprt][file] + + who [-mTu][-abdHlprt][file] + + who -q [file] + + who am i + + who am I + + +DESCRIPTION + The who utility shall list various pieces of information + about accessible users. The domain of accessibility is + implementation-defined. + + Based on the options given, who can also list the user's + name, terminal line, login time, elapsed time since + activity occurred on the line, and the process ID of the + command interpreter for each current system user. + +OPTIONS + The who utility shall conform to the Base Definitions + volume of IEEE Std 1003.1-2001, Section 12.2, Utility + Syntax Guidelines. + + The following options shall be supported. The metavari- + ables, such as <line>, refer to fields described in the + STDOUT section. + + -a Process the implementation-defined database or + named file with the -b, -d, -l, -p, -r, -t, -T + and -u options turned on. + + -b Write the time and date of the last reboot. + + -d Write a list of all processes that have expired + and not been respawned by the init system + process. The <exit> field shall appear for dead + processes and contain the termination and exit + values of the dead process. This can be useful in + determining why a process terminated. + + -H Write column headings above the regular output. + + -l (The letter ell.) List only those lines on which + the system is waiting for someone to login. The + <name> field shall be LOGIN in such cases. Other + fields shall be the same as for user entries + except that the <state> field does not exist. + + -m Output only information about the current termi- + nal. + + -p List any other process that is currently active + and has been previously spawned by init. + + -q (Quick.) List only the names and the number of + users currently logged on. When this option is + used, all other options shall be ignored. + + -r Write the current run-level of the init process. + + -s List only the <name>, <line>, and <time> fields. + This is the default case. + + -t Indicate the last change to the system clock. + + -T Show the state of each terminal, as described in + the STDOUT section. + + -u Write "idle time" for each displayed user in + addition to any other information. The idle time + is the time since any activity occurred on the + user's terminal. The method of determining this + is unspecified. This option shall list only + those users who are currently logged in. The + <name> is the user's login name. The <line> is + the name of the line as found in the directory + /dev. The <time> is the time that the user logged + in. The <activity> is the number of hours and + minutes since activity last occurred on that par- + ticular line. A dot indicates that the terminal + has seen activity in the last minute and is + therefore "current". If more than twenty-four + hours have elapsed or the line has not been used + since boot time, the entry shall be marked <old>. + This field is useful when trying to determine + whether a person is working at the terminal or + not. The <pid> is the process ID of the user's + login process. + + +OPERANDS + The following operands shall be supported: + + am i, am I + In the POSIX locale, limit the output to describ- + ing the invoking user, equivalent to the -m + option. The am and i or I must be separate argu- + ments. + + file Specify a pathname of a file to substitute for + the implementation-defined database of logged-on + users that who uses by default. + + +STDIN + Not used. + +INPUT FILES + None. + +ENVIRONMENT VARIABLES + The following environment variables shall affect the + execution of who: + + LANG Provide a default value for the internationaliza- + tion variables that are unset or null. (See the + Base Definitions volume of IEEE Std 1003.1-2001, + Section 8.2, Internationalization Variables for + the precedence of internationalization variables + used to determine the values of locale cate- + gories.) + + LC_ALL If set to a non-empty string value, override the + values of all the other internationalization + variables. + + LC_CTYPE + Determine the locale for the interpretation of + sequences of bytes of text data as characters + (for example, single-byte as opposed to multi- + byte characters in arguments). + + LC_MESSAGES + Determine the locale that should be used to + affect the format and contents of diagnostic mes- + sages written to standard error. + + LC_TIME + Determine the locale used for the format and con- + tents of the date and time strings. + + NLSPATH + Determine the location of message catalogs for + the processing of LC_MESSAGES . + + TZ Determine the timezone used when writing date and + time information. If TZ is unset or null, an + unspecified default timezone shall be used. + + +ASYNCHRONOUS EVENTS + Default. + +STDOUT + The who utility shall write its default format to the + standard output in an implementation-defined format, + subject only to the requirement of containing the infor- + mation described above. + + XSI-conformant systems shall write the default informa- + tion to the standard output in the following general + format: + + + <name>[<state>]<line><time>[<activity>][<pid>][<comment>][<exit>] <img + src="../images/opt-end.gif" border="0"> + + The following format shall be used for the -T option: + + + "%s %c %s %s\n" <name>, <terminal state>, <terminal name>, + <time of login> + + where <terminal state> is one of the following charac- + ters: + + + The terminal allows write access to other users. + + - The terminal denies write access to other users. + + ? The terminal write-access state cannot be deter- + mined. + + + In the POSIX locale, the <time of login> shall be equiv- + alent in format to the output of: + + + date +"%b %e %H:%M" + + If the -u option is used with -T, the idle time shall be + added to the end of the previous format in an unspeci- + fied format. + +STDERR + The standard error shall be used only for diagnostic + messages. + +OUTPUT FILES + None. + +EXTENDED DESCRIPTION + None. + +EXIT STATUS + The following exit values shall be returned: + + 0 Successful completion. + + >0 An error occurred. + + +CONSEQUENCES OF ERRORS + Default. + + The following sections are informative. + +APPLICATION USAGE + The name init used for the system process is the most + commonly used on historical systems, but it may vary. + + The "domain of accessibility" referred to is a broad + concept that permits interpretation either on a very + secure basis or even to allow a network-wide implementa- + tion like the historical rwho. + +EXAMPLES + None. + +RATIONALE + Due to differences between historical implementations, + the base options provided were a compromise to allow + users to work with those functions. The standard devel- + opers also considered removing all the options, but felt + that these options offered users valuable functionality. + Additional options to match historical systems are + available on XSI-conformant systems. + + It is recognized that the who command may be of limited + usefulness, especially in a multi-level secure environ- + ment. The standard developers considered, however, that + having some standard method of determining the "accessi- + bility" of other users would aid user portability. + + No format was specified for the default who output for + systems not supporting the XSI Extension. In such a + user-oriented command, designed only for human use, this + was not considered to be a deficiency. + + The format of the terminal name is unspecified, but the + descriptions of ps, talk, and write require that they + use the same format. + + It is acceptable for an implementation to produce no + output for an invocation of who mil. + +FUTURE DIRECTIONS + None. + +SEE ALSO + mesg + +COPYRIGHT + Portions of this text are reprinted and reproduced in + electronic form from IEEE Std 1003.1, 2003 Edition, + Standard for Information Technology -- Portable Operat- + ing System Interface (POSIX), The Open Group Base Speci- + fications Issue 6, Copyright (C) 2001-2003 by the Insti- + tute of Electrical and Electronics Engineers, Inc and + The Open Group. In the event of any discrepancy between + this version and the original IEEE and The Open Group + Standard, the original IEEE and The Open Group Standard + is the referee document. The original Standard can be + obtained online at http://www.open- + group.org/unix/online.html . + + + +POSIX 2003 who(P) |