tgetuser.3 - plan9port - [fork] Plan 9 from user space
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tgetuser.3 (953B)
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1 .TH GETUSER 3
2 .SH NAME
3 getuser, sysname \- get user or system name
4 .SH SYNOPSIS
5 .B #include <u.h>
6 .br
7 .B #include <libc.h>
8 .PP
9 .B
10 char* getuser(void)
11 .PP
12 .B
13 char* sysname(void)
14 .SH DESCRIPTION
15 .I Getuser
16 returns a pointer to static data which contains the
17 null-terminated
18 name of the user who
19 owns the current process.
20 .I Getuser
21 calls
22 .MR getuid (2)
23 and then reads
24 .B /etc/passwd
25 to find the corresponding name.
26 .PP
27 .I Sysname
28 returns a pointer to static data which contains the name
29 of the machine on which the current process is running.
30 .I Sysname
31 looks first for an environment variable
32 .BR $sysname .
33 If there is no such variable,
34 .I sysname
35 calls
36 .MR gethostname (2)
37 and truncates the returned name at the first dot.
38 If
39 .I gethostname
40 fails,
41 .I sysname
42 returns the default name
43 .LR gnot .
44 .PP
45 Unlike
46 .IR getuser ,
47 .I sysname
48 caches the string, deriving the host name only once.
49 .SH SOURCE
50 .B \*9/src/lib9/getuser.c
51 .br
52 .B \*9/src/lib9/sysname.c