2004-04-10 18:53:55 +00:00
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.TH GETUSER 3
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.SH NAME
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getuser, sysname \- get user or system name
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.SH SYNOPSIS
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.B #include <u.h>
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.br
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.B #include <libc.h>
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.PP
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.B
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char* getuser(void)
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.PP
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.B
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char* sysname(void)
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.SH DESCRIPTION
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.I Getuser
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returns a pointer to static data which contains the
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null-terminated
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name of the user who
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owns the current process.
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.I Getuser
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2005-01-03 06:40:20 +00:00
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calls
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.IR getuid (2)
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and then reads
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.B /etc/passwd
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to find the corresponding name.
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2004-04-10 18:53:55 +00:00
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.PP
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.I Sysname
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2005-01-03 06:40:20 +00:00
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returns a pointer to static data which contains the name
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of the machine on which the current process is running.
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.I Sysname
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looks first for an environment variable
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.BR $sysname .
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If there is no such variable,
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.I sysname
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calls
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.IR gethostname (2)
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and truncates the returned name at the first dot.
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If
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.I gethostname
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fails,
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.I sysname
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returns the default name
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.LR gnot .
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.PP
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2004-04-10 18:53:55 +00:00
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Unlike
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.IR getuser ,
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.I sysname
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2005-01-03 06:40:20 +00:00
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caches the string, deriving the host name only once.
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2004-04-10 18:53:55 +00:00
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.SH SOURCE
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2005-01-11 17:37:33 +00:00
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.B \*9/src/lib9/getuser.c
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2005-01-03 06:40:20 +00:00
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.br
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2005-01-11 17:37:33 +00:00
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.B \*9/src/lib9/sysname.c
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