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FILTERM ------- Usage: filterm INPUT OUTPUT [COMMAND [ARGS]] Execute the specified COMMAND (default is the shell), filtering terminal input and/or output. It can help e.g. when our terminal is unable to display non-ASCII characters or to enter them from the keyboard. It also makes writing various terminal filters easier. INPUT and OUTPUT are names of konwert's filters - they are passed as the first argument to the konwert program. `filterm - OUTPUT' filters only output, and `filterm INPUT -' only input. The command `-' executes the shell as a login shell. In addition, the following standard options are recognized: --help display this help and exit --version output version information and exit It differs from `konwert INPUT |COMMAND |konwert OUTPUT' in that the command is executed on a pseudo-terminal, so full-screen programs work correctly. The filters have to output the characters as soon as they receive all necessary input, without buffering. trs scripts are OK, but sed or awk or tr scripts are not. In C you may use read(), getchar(), fread(), and write(), but putchar() and fwrite() only together with fflush(stdout). In C++: cin.get(), cout.put(), and cout <<. In perl: sysread, getc, read, and syswrite, but print only with $| = 1. The input filter will have set the environment variable FILTERM=in, and the output one - FILTERM=out. This way some filters can slightly alter their behaviour when working for filterm. -- __("< Marcin Kowalczyk * qrczak@knm.org.pl http://qrczak.home.ml.org/ \__/ GCS/M d- s+:-- a21 C+++>+++$ UL++>++++$ P+++ L++>++++$ E->++ ^^ W++ N+++ o? K? w(---) O? M- V? PS-- PE++ Y? PGP->+ t QRCZAK 5? X- R tv-- b+>++ DI D- G+ e>++++ h! r--%>++ y-
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