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><H1
><A
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>popen</A
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><DIV
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>popen -- Open process file pointer</DIV
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><H2
>Description</H2
><DIV
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><P
></P
><CODE
CLASS="FUNCDEF"
>int popen</CODE
>(string command, string mode);<P
></P
></DIV
><P
>
Opens a pipe to a process executed by forking the command given
by command.
</P
><P
>
Returns a file pointer identical to that returned by
<A
HREF="function.fopen.html"
><B
CLASS="function"
>fopen()</B
></A
>, except that it is unidirectional (may
only be used for reading or writing) and must be closed with
<A
HREF="function.pclose.html"
><B
CLASS="function"
>pclose()</B
></A
>. This pointer may be used with
<A
HREF="function.fgets.html"
><B
CLASS="function"
>fgets()</B
></A
>, <A
HREF="function.fgetss.html"
><B
CLASS="function"
>fgetss()</B
></A
>, and
<A
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><B
CLASS="function"
>fputs()</B
></A
>.
</P
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> If an error occurs, returns false.
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> 1
2 $fp = popen ("/bin/ls", "r");
3 </PRE
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</P
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> See also <A
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><B
CLASS="function"
>pclose()</B
></A
>.
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