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Annotation of coherent/a/usr/man/COHERENT/popen, revision 1.1

1.1     ! root        1: 
        !             2: 
        !             3: popen()                   STDIO Function                  popen()
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        !             6: 
        !             7: 
        !             8: Open a pipe
        !             9: 
        !            10: #include <stdio.h>
        !            11: FFIILLEE *ppooppeenn(_c_o_m_m_a_n_d, _h_o_w)
        !            12: cchhaarr *_c_o_m_m_a_n_d, *_h_o_w;
        !            13: 
        !            14: popen opens a pipe.  It resembles the function fopen, except that
        !            15: the opened object is a command line to the shell sh rather than a
        !            16: file.
        !            17: 
        !            18: The caller can read the standard output of command when how is rr,
        !            19: or write to  the standard input of command when  how is ww.  popen
        !            20: returns a pointer  to a FFIILLEE structure that may  be read or writ-
        !            21: ten.
        !            22: 
        !            23: ***** Files *****
        !            24: 
        !            25: <stdio.h>
        !            26: 
        !            27: ***** See Also *****
        !            28: 
        !            29: fclose(), fopen(), pclose(), pipe(), sh, STDIO, system(), wait()
        !            30: 
        !            31: ***** Diagnostics *****
        !            32: 
        !            33: popen  returns NULL  if  the link  to  command could  not be  es-
        !            34: tablished.
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        !            64: COHERENT Lexicon                                           Page 1
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