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GNU Info (iostream-295.info)ProcbufReading/writing from/to a pipe ============================== The "procbuf" class is a GNU extension. It is derived from `streambuf'. A `procbuf' can be "closed" (in which case it does nothing), or "open" (in which case it allows communicating through a pipe with some other program). - Constructor: procbuf::procbuf () Creates a `procbuf' in a "closed" state. - Method: procbuf* procbuf::open (const char *COMMAND, int MODE) Uses the shell (`/bin/sh') to run a program specified by COMMAND. If MODE is `ios::in', standard output from the program is sent to a pipe; you can read from the pipe by reading from the `procbuf'. (This is similar to `popen(COMMAND, "r")'.) If MODE is `ios::out', output written to the `procbuf' is written to a pipe; the program is set up to read its standard input from (the other end of) the pipe. (This is similar to `popen(COMMAND, "w")'.) The `procbuf' must start out in the "closed" state. Returns `*this' on success, and `NULL' on failure. - Constructor: procbuf::procbuf (const char *COMMAND, int MODE) Calls `procbuf::open (COMMAND, MODE)'. - Method: procbuf* procbuf::close () Waits for the program to finish executing, and then cleans up the resources used. Returns `*this' on success, and `NULL' on failure. - Destructor: procbuf::~procbuf () Calls `procbuf::close'. automatically generated by info2www version 1.2.2.9 |