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>Process Environment [POSIX Section 4]</TITLE
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NAME="POSIX-PROCESS-ENVIRONMENT">Process Environment &#0091;POSIX Section 4&#0093;</H1
><DIV
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NAME="AEN13011">Functions Implemented</H2
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>int uname( struct utsname &#0042;name ); 
time&#0095;t time( time&#0095;t &#0042;tloc ); 
char &#0042;getenv( const char &#0042;name ); 
int isatty( int fd );
long sysconf( int name );</PRE
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>pid&#0095;t getpid( void ); 
pid&#0095;t getppid( void ); 
uid&#0095;t getuid( void ); 
uid&#0095;t geteuid( void ); 
gid&#0095;t getgid( void ); 
gid&#0095;t getegid( void ); 
int setuid( uid&#0095;t uid ); 
int setgid( gid&#0095;t gid ); 
int getgroups( int gidsetsize, gid&#0095;t grouplist&#0091;&#0093; ); 
char &#0042;getlogin( void ); 
int getlogin&#0095;r( char &#0042;name, size&#0095;t namesize ); 
pid&#0095;t getpgrp( void ); 
pid&#0095;t setsid( void );
int setpgid( pid&#0095;t pid, pid&#0095;t pgid ); 
char &#0042;ctermid( char &#0042;s); 
char &#0042;ttyname( int fd );                             &#0047;&#0047; TBA 
int ttyname&#0095;r( int fd, char &#0042;name, size&#0095;t namesize); &#0047;&#0047; TBA 
clock&#0095;t times( struct tms &#0042;buffer );                 &#0047;&#0047; TBA</PRE
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NAME="AEN13017">Notes</H2
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><LI
><P
>The fields of the <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>utsname</I
></SPAN
>
	    structure are initialized as follows:
            <TABLE
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>	    sysname	&#8220;eCos&#8221; 
	    nodename	&#8220;&#8221;	(gethostname() is currently not available)
 
	    release		Major version number of the kernel 
	    version   		Minor version number of the kernel 
	    machine	&#8220;&#8221; 	(Requires some config tool changes)
            </PRE
></TD
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>
	    </P
><P
>	    The sizes of these strings are defined by
	    CYG&#0095;POSIX&#0095;UTSNAME&#0095;LENGTH and
	    CYG&#0095;POSIX&#0095;UTSNAME&#0095;NODENAME&#0095;LENGTH. The
	    latter defaults to the value of the former, but may also
	    be set independently to accommodate a longer node name.
	    </P
></LI
><LI
><P
>	    The <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>time()</I
></SPAN
> function is currently
	    implemented in the C library.
	    </P
></LI
><LI
><P
>A set of environment strings may be defined at configuration
	    time with the CYGDAT&#0095;LIBC&#0095;DEFAULT&#0095;ENVIRONMENT
	    option. The application may also define an environment by direct
	    assignment to the <SPAN
CLASS="strong"
><B
CLASS="EMPHASIS"
>environ</B
></SPAN
>
	    variable.
	    </P
></LI
><LI
><P
>	    At present <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>isatty()</I
></SPAN
> assumes that
	    any character device is a tty and that all other devices are not
	    ttys. Since the only kind of device that eCos currently supports
	    is serial character devices, this is an adequate
	    distinction.
	    </P
></LI
><LI
><P
>	    All system variables supported by sysconf will yield a
	    value. However, those that are irrelevant to eCos will
	    either return the default minimum defined in
	    <TT
CLASS="FILENAME"
>&lt;limits.h&gt;</TT
>,
	    or zero.
	    </P
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