Commit | Line | Data |
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3998bd0b | 1 | .\" @(#)getlogin.3 6.3 (Berkeley) %G% |
4db1fb17 | 2 | .\" |
e767d426 | 3 | .TH GETLOGIN 3 "" |
4db1fb17 KM |
4 | .AT 3 |
5 | .SH NAME | |
6 | getlogin \- get login name | |
7 | .SH SYNOPSIS | |
8 | .B char *getlogin() | |
9 | .SH DESCRIPTION | |
10 | .I Getlogin | |
6f005db8 | 11 | returns a pointer to the login name as found in |
3998bd0b | 12 | .IR /var/run/utmp . |
6f005db8 | 13 | It may be used in conjunction with |
4db1fb17 | 14 | .I getpwnam |
6f005db8 KM |
15 | to locate the correct password file entry when the same userid |
16 | is shared by several login names. | |
4db1fb17 KM |
17 | .PP |
18 | If | |
19 | .I getlogin | |
6f005db8 | 20 | is called within a process that is not attached to a |
6646c19e | 21 | terminal, or if there is no entry in |
3998bd0b | 22 | .I /var/run/utmp |
6646c19e JL |
23 | for the process's terminal, |
24 | .I getlogin | |
25 | returns a NULL pointer (0). | |
26 | A reasonable procedure for determining the login name is to first call | |
4db1fb17 | 27 | .I getlogin |
6f005db8 | 28 | and if it fails, to call |
6646c19e | 29 | .IR getpwuid ( getuid ()). |
4db1fb17 | 30 | .SH FILES |
3998bd0b | 31 | /var/run/utmp |
4db1fb17 | 32 | .SH "SEE ALSO" |
6646c19e | 33 | getpwent(3), utmp(5), ttyslot(3) |
4db1fb17 | 34 | .SH DIAGNOSTICS |
6646c19e | 35 | Returns a NULL pointer (0) if name not found. |
4db1fb17 KM |
36 | .SH BUGS |
37 | The return values point to static data | |
38 | whose content is overwritten by each call. |