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NAME="POSIX-PROCESS-ENVIRONMENT">Process Environment [POSIX Section 4]</H1
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NAME="POSIX-PROCESS-ENVIRONMENT">Process Environment [POSIX Section 4]</H1
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><DIV
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><DIV
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><H2
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><H2
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NAME="AEN13011">Functions Implemented</H2
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NAME="AEN13011">Functions Implemented</H2
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><TABLE
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><PRE
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><PRE
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CLASS="SCREEN"
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>int uname( struct utsname *name );
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>int uname( struct utsname *name );
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time_t time( time_t *tloc );
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time_t time( time_t *tloc );
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char *getenv( const char *name );
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char *getenv( const char *name );
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int isatty( int fd );
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int isatty( int fd );
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long sysconf( int name );</PRE
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long sysconf( int name );</PRE
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><A
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NAME="AEN13014">Functions Omitted</H2
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NAME="AEN13014">Functions Omitted</H2
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><TABLE
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><TD
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><TD
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><PRE
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><PRE
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CLASS="SCREEN"
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CLASS="SCREEN"
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>pid_t getpid( void );
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>pid_t getpid( void );
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pid_t getppid( void );
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pid_t getppid( void );
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uid_t getuid( void );
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uid_t getuid( void );
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uid_t geteuid( void );
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uid_t geteuid( void );
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gid_t getgid( void );
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gid_t getgid( void );
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gid_t getegid( void );
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gid_t getegid( void );
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int setuid( uid_t uid );
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int setuid( uid_t uid );
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int setgid( gid_t gid );
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int setgid( gid_t gid );
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int getgroups( int gidsetsize, gid_t grouplist[] );
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int getgroups( int gidsetsize, gid_t grouplist[] );
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char *getlogin( void );
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char *getlogin( void );
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int getlogin_r( char *name, size_t namesize );
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int getlogin_r( char *name, size_t namesize );
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pid_t getpgrp( void );
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pid_t getpgrp( void );
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pid_t setsid( void );
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pid_t setsid( void );
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int setpgid( pid_t pid, pid_t pgid );
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int setpgid( pid_t pid, pid_t pgid );
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char *ctermid( char *s);
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char *ctermid( char *s);
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char *ttyname( int fd ); // TBA
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char *ttyname( int fd ); // TBA
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int ttyname_r( int fd, char *name, size_t namesize); // TBA
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int ttyname_r( int fd, char *name, size_t namesize); // TBA
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clock_t times( struct tms *buffer ); // TBA</PRE
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clock_t times( struct tms *buffer ); // TBA</PRE
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></TD
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><H2
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><H2
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><A
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><A
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NAME="AEN13017">Notes</H2
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NAME="AEN13017">Notes</H2
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><P
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><P
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></P
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></P
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><UL
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><UL
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><LI
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><LI
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><P
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><P
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>The fields of the <SPAN
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>The fields of the <SPAN
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CLASS="emphasis"
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><I
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><I
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CLASS="EMPHASIS"
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CLASS="EMPHASIS"
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>utsname</I
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>utsname</I
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></SPAN
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></SPAN
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>
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>
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structure are initialized as follows:
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structure are initialized as follows:
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<TABLE
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><PRE
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><PRE
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CLASS="SCREEN"
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CLASS="SCREEN"
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> sysname “eCos”
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> sysname “eCos”
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nodename “” (gethostname() is currently not available)
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nodename “” (gethostname() is currently not available)
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|
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release Major version number of the kernel
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release Major version number of the kernel
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version Minor version number of the kernel
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version Minor version number of the kernel
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machine “” (Requires some config tool changes)
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machine “” (Requires some config tool changes)
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</PRE
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</PRE
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></TD
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></TD
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></TR
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></TR
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></TABLE
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></TABLE
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>
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>
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</P
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</P
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><P
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><P
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> The sizes of these strings are defined by
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> The sizes of these strings are defined by
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CYG_POSIX_UTSNAME_LENGTH and
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CYG_POSIX_UTSNAME_LENGTH and
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CYG_POSIX_UTSNAME_NODENAME_LENGTH. The
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CYG_POSIX_UTSNAME_NODENAME_LENGTH. The
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latter defaults to the value of the former, but may also
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latter defaults to the value of the former, but may also
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be set independently to accommodate a longer node name.
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be set independently to accommodate a longer node name.
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</P
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</P
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></LI
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></LI
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><LI
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><LI
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><P
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><P
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> The <SPAN
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> The <SPAN
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CLASS="emphasis"
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CLASS="emphasis"
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><I
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><I
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CLASS="EMPHASIS"
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CLASS="EMPHASIS"
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>time()</I
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>time()</I
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></SPAN
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></SPAN
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> function is currently
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> function is currently
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implemented in the C library.
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implemented in the C library.
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</P
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</P
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></LI
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></LI
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><LI
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><LI
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><P
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><P
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>A set of environment strings may be defined at configuration
|
>A set of environment strings may be defined at configuration
|
time with the CYGDAT_LIBC_DEFAULT_ENVIRONMENT
|
time with the CYGDAT_LIBC_DEFAULT_ENVIRONMENT
|
option. The application may also define an environment by direct
|
option. The application may also define an environment by direct
|
assignment to the <SPAN
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assignment to the <SPAN
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CLASS="strong"
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CLASS="strong"
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><B
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><B
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CLASS="EMPHASIS"
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CLASS="EMPHASIS"
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>environ</B
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>environ</B
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></SPAN
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></SPAN
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>
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>
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variable.
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variable.
|
</P
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</P
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></LI
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></LI
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><LI
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><LI
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><P
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><P
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> At present <SPAN
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> At present <SPAN
|
CLASS="emphasis"
|
CLASS="emphasis"
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><I
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><I
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CLASS="EMPHASIS"
|
CLASS="EMPHASIS"
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>isatty()</I
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>isatty()</I
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></SPAN
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></SPAN
|
> assumes that
|
> assumes that
|
any character device is a tty and that all other devices are not
|
any character device is a tty and that all other devices are not
|
ttys. Since the only kind of device that eCos currently supports
|
ttys. Since the only kind of device that eCos currently supports
|
is serial character devices, this is an adequate
|
is serial character devices, this is an adequate
|
distinction.
|
distinction.
|
</P
|
</P
|
></LI
|
></LI
|
><LI
|
><LI
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><P
|
><P
|
> All system variables supported by sysconf will yield a
|
> All system variables supported by sysconf will yield a
|
value. However, those that are irrelevant to eCos will
|
value. However, those that are irrelevant to eCos will
|
either return the default minimum defined in
|
either return the default minimum defined in
|
<TT
|
<TT
|
CLASS="FILENAME"
|
CLASS="FILENAME"
|
><limits.h></TT
|
><limits.h></TT
|
>,
|
>,
|
or zero.
|
or zero.
|
</P
|
</P
|
></LI
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