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recordio(1) [osx man page]

recordio(1)						      General Commands Manual						       recordio(1)

recordio - record the input and output of a program SYNTAX
recordio program [ arg ... ] DESCRIPTION
recordio runs program with the given arguments. It prints lines to stderr showing the input and output of program. At the beginning of each line on stderr, recordio inserts the program process ID, along with < for input or > for output. At the end of each line it inserts a space, a plus sign, or [EOF]; a space indicates that there was a newline in the input or output, and [EOF] indicates the end of input or output. recordio prints every packet of input and output immediately. It does not attempt to combine packets into coherent stderr lines. For example, recordio sh -c 'cat /dev/fd/8 2>&1' > /dev/null could produce 5135 > cat: /dev/fd/8: Bad file descriptor 5135 > [EOF] or 5135 > cat: + 5135 > /dev/fd/8+ 5135 > : + 5135 > Bad file descriptor 5135 > [EOF] recordio uses several lines for long packets to guarantee that each line is printed atomically to stderr. recordio runs as a child of program. It exits when it sees the end of program's output. SEE ALSO
tcpserver(1) recordio(1)

Check Out this Related Man Page

CAT(1)							      General Commands Manual							    CAT(1)

cat - catenate and print SYNOPSIS
cat [ -u ] [ -n ] [ -s ] [ -v ] file ... DESCRIPTION
Cat reads each file in sequence and displays it on the standard output. Thus cat file displays the file on the standard output, and cat file1 file2 >file3 concatenates the first two files and places the result on the third. If no input file is given, or if the argument `-' is encountered, cat reads from the standard input file. Output is buffered in the block size recommended by stat(2) unless the standard output is a terminal, when it is line buffered. The -u option makes the output completely unbuffered. The -n option displays the output lines preceded by lines numbers, numbered sequentially from 1. Specifying the -b option with the -n option omits the line numbers from blank lines. The -s option crushes out multiple adjacent empty lines so that the output is displayed single spaced. The -v option displays non-printing characters so that they are visible. Control characters print like ^X for control-x; the delete char- acter (octal 0177) prints as ^?. Non-ascii characters (with the high bit set) are printed as M- (for meta) followed by the character of the low 7 bits. A -e option may be given with the -v option, which displays a `$' character at the end of each line. Specifying the -t option with the -v option displays tab characters as ^I. SEE ALSO
cp(1), ex(1), more(1), pr(1), tail(1) BUGS
Beware of `cat a b >a' and `cat a b >b', which destroy the input files before reading them. 4th Berkeley Distribution May 5, 1986 CAT(1)
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