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><DIV
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><DIV
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><H1
CLASS="title"
>CXXV. POSIX Functions</H1
><DIV
CLASS="PARTINTRO"
><A
NAME="AEN182691"
></A
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="posix.intro"
>简介</A
></H1
><P
> This module contains an interface to those functions defined in
the IEEE 1003.1 (POSIX.1) standards document which are not
accessible through other means. POSIX.1 for example defined the
open(), read(), write() and close() functions, too, which
traditionally have been part of PHP 3 for a long time. Some more
system specific functions have not been available before, though,
and this module tries to remedy this by providing easy access to
these functions.
</P
><DIV
CLASS="warning"
><P
></P
><TABLE
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BORDER="1"
WIDTH="100%"
><TR
><TD
ALIGN="CENTER"
><B
>警告</B
></TD
></TR
><TR
><TD
ALIGN="LEFT"
><P
> Sensitive data can be retrieved with the POSIX functions, e.g.
<A
HREF="function.posix-getpwnam.html"
><B
CLASS="function"
>posix_getpwnam()</B
></A
> and friends. None of the
POSIX function perform any kind of access
checking when <A
HREF="features.safe-mode.html#ini.safe-mode"
>safe mode</A
> is enabled.
It's therefore <SPAN
CLASS="strong"
><B
CLASS="emphasis"
>strongly</B
></SPAN
> advised to
disable the POSIX extension at all (use
<TT
CLASS="literal"
>--disable-posix</TT
> in your configure line) if you're
operating in such an environment.
</P
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>本扩展模块在 Windows 平台下不可用。</P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="posix.installation"
>安装</A
></H1
><P
> POSIX functions are enabled by default. You can disable POSIX-like
functions with <CODE
CLASS="option"
>--disable-posix</CODE
>.
</P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="posix.constants"
>预定义常量</A
></H1
><P
>以下常量由本扩展模块定义，因此只有在本扩展模块被编译到
PHP 中，或者在运行时被动态加载后才有效。</P
><P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><TT
CLASS="constant"
><B
>POSIX_F_OK</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> Check whether the file exists.
</P
></DD
><DT
><TT
CLASS="constant"
><B
>POSIX_R_OK</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> Check whether the file exists and has read permissions.
</P
></DD
><DT
><TT
CLASS="constant"
><B
>POSIX_W_OK</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> Check whether the file exists and has write permissions.
</P
></DD
><DT
><TT
CLASS="constant"
><B
>POSIX_X_OK</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> Check whether the file exists and has execute permissions.
</P
></DD
><DT
><TT
CLASS="constant"
><B
>POSIX_S_IFBLK</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> Block special file
</P
></DD
><DT
><TT
CLASS="constant"
><B
>POSIX_S_IFCHR</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> Character special file
</P
></DD
><DT
><TT
CLASS="constant"
><B
>POSIX_S_IFIFO</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> FIFO (named pipe) special file
</P
></DD
><DT
><TT
CLASS="constant"
><B
>POSIX_S_IFREG</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> Normal file
</P
></DD
><DT
><TT
CLASS="constant"
><B
>POSIX_S_IFSOCK</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> Socket
</P
></DD
></DL
></DIV
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
These constants are available since PHP 5.1.0. Please also note that some
of them may not be available in your system.
</P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="posix.seealso"
>参见</A
></H1
><P
> The section about <A
HREF="ref.pcntl.html"
>Process Control Functions</A
>
maybe of interest for you.
</P
></DIV
></DIV
><DIV
CLASS="TOC"
><DL
><DT
><B
>目录</B
></DT
><DT
><A
HREF="function.posix-access.html"
>posix_access</A
> --
Determine accessibility of a file
</DT
><DT
><A
HREF="function.posix-ctermid.html"
>posix_ctermid</A
> -- Get path name of controlling terminal</DT
><DT
><A
HREF="function.posix-get-last-error.html"
>posix_get_last_error</A
> -- Retrieve the error number set by the last posix function that failed</DT
><DT
><A
HREF="function.posix-getcwd.html"
>posix_getcwd</A
> -- Pathname of current directory</DT
><DT
><A
HREF="function.posix-getegid.html"
>posix_getegid</A
> -- Return the effective group ID of the current process</DT
><DT
><A
HREF="function.posix-geteuid.html"
>posix_geteuid</A
> -- Return the effective user ID of the current process</DT
><DT
><A
HREF="function.posix-getgid.html"
>posix_getgid</A
> -- Return the real group ID of the current process</DT
><DT
><A
HREF="function.posix-getgrgid.html"
>posix_getgrgid</A
> -- Return info about a group by group id</DT
><DT
><A
HREF="function.posix-getgrnam.html"
>posix_getgrnam</A
> -- Return info about a group by name</DT
><DT
><A
HREF="function.posix-getgroups.html"
>posix_getgroups</A
> -- Return the group set of the current process</DT
><DT
><A
HREF="function.posix-getlogin.html"
>posix_getlogin</A
> -- Return login name</DT
><DT
><A
HREF="function.posix-getpgid.html"
>posix_getpgid</A
> -- Get process group id for job control</DT
><DT
><A
HREF="function.posix-getpgrp.html"
>posix_getpgrp</A
> -- Return the current process group identifier</DT
><DT
><A
HREF="function.posix-getpid.html"
>posix_getpid</A
> -- Return the current process identifier</DT
><DT
><A
HREF="function.posix-getppid.html"
>posix_getppid</A
> -- Return the parent process identifier</DT
><DT
><A
HREF="function.posix-getpwnam.html"
>posix_getpwnam</A
> -- Return info about a user by username</DT
><DT
><A
HREF="function.posix-getpwuid.html"
>posix_getpwuid</A
> -- Return info about a user by user id</DT
><DT
><A
HREF="function.posix-getrlimit.html"
>posix_getrlimit</A
> -- Return info about system resource limits</DT
><DT
><A
HREF="function.posix-getsid.html"
>posix_getsid</A
> -- Get the current sid of the process</DT
><DT
><A
HREF="function.posix-getuid.html"
>posix_getuid</A
> -- Return the real user ID of the current process</DT
><DT
><A
HREF="function.posix-isatty.html"
>posix_isatty</A
> -- Determine if a file descriptor is an interactive terminal</DT
><DT
><A
HREF="function.posix-kill.html"
>posix_kill</A
> -- Send a signal to a process</DT
><DT
><A
HREF="function.posix-mkfifo.html"
>posix_mkfifo</A
> -- Create a fifo special file (a named pipe)</DT
><DT
><A
HREF="function.posix-mknod.html"
>posix_mknod</A
> --
Create a special or ordinary file (POSIX.1)
</DT
><DT
><A
HREF="function.posix-setegid.html"
>posix_setegid</A
> -- Set the effective GID of the current process</DT
><DT
><A
HREF="function.posix-seteuid.html"
>posix_seteuid</A
> -- Set the effective UID of the current process</DT
><DT
><A
HREF="function.posix-setgid.html"
>posix_setgid</A
> -- Set the GID of the current process</DT
><DT
><A
HREF="function.posix-setpgid.html"
>posix_setpgid</A
> -- Set process group id for job control</DT
><DT
><A
HREF="function.posix-setsid.html"
>posix_setsid</A
> -- Make the current process a session leader</DT
><DT
><A
HREF="function.posix-setuid.html"
>posix_setuid</A
> -- Set the UID of the current process</DT
><DT
><A
HREF="function.posix-strerror.html"
>posix_strerror</A
> -- Retrieve the system error message associated with the given errno</DT
><DT
><A
HREF="function.posix-times.html"
>posix_times</A
> -- Get process times</DT
><DT
><A
HREF="function.posix-ttyname.html"
>posix_ttyname</A
> -- Determine terminal device name</DT
><DT
><A
HREF="function.posix-uname.html"
>posix_uname</A
> -- Get system name</DT
></DL
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