STANDARD INPUT/OUTPUT
\stˈandəd ˈɪnpʊt slˈaʃ ˈa͡ʊtpʊt], \stˈandəd ˈɪnpʊt slˈaʃ ˈaʊtpʊt], \s_t_ˈa_n_d_ə_d ˈɪ_n_p_ʊ_t s_l_ˈa_ʃ ˈaʊ_t_p_ʊ_t]\
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The predefined input/outputchannels which every Unix process is initialised with.Standard input is by default from the terminal, and standardoutput and standard error are to the terminal. Each of thesechannels (controlled via a file descriptor 0, 1, or 2 -stdin, stdout, stderr) can be redirected to a file, anotherdevice or a pipe connecting its process to another process.The process is normally unaware of such I/O redirection,thus simplifying prototyping of combinations of commands.The C programming language library includes routines toperform basic operations on standard I/O. Examples are"printf", allowing text to be sent to standard output, and"scanf", allowing the program to read from standard input.
By Denis Howe
Word of the day
SQ10,643
- A serotonin antagonist with limited antihistaminic, anticholinergic, and immunosuppressive activity.