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Annotation of coherent/a/usr/man/COHERENT/popen, revision 1.1.1.1

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                      3: popen()                   STDIO Function                  popen()
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                      8: Open a pipe
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                     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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