OD(1) COMMAND REFERENCE OD(1) NAME od - octal, decimal, hex, ascii dump SYNOPSIS od [ -format ] [ filename ] [ [+]offset[.][b] [label] ] DESCRIPTION Od displays file, or its standard input, in one or more dump formats as selected by the first argument. If the first argument is missing, -o is the default. The offset argument specifies the byte offset into the file where dumping is to commence. This argument is normally interpreted as octal bytes. A different radix can be specified: If ``.'' is appended to the argument, then offset is interpreted in decimal. If offset begins with ``x'' or ``0x'', it is interpreted in hexadecimal. If ``b'' (``B'') is appended, the offset is interpreted as a block count, where a block is 1024-bytes. If the filename argument is omitted, an offset argument must be preceded by ``+''. The radix of the displayed address will be the same as the radix of the offset, if specified; otherwise it will be octal. Label will be interpreted as a pseudo-address for the first byte displayed. It will be shown in ``()'' following the file offset. It is intended to be used with core images to indicate the real memory address. The syntax for label is identical to that for offset. By default, display lines that are identical to the last line shown are not output, but are indicated with an ``*'' in column 1. This behavior can be turned off with the -v option. OPTIONS -a Interpret bytes as characters and display them with their ACSII names. If the p character is given also, then bytes with even parity are underlined. The P character causes bytes with odd parity to be underlined. Otherwise the parity bit is ignored. -b Interpret bytes as unsigned octal. -c Interpret bytes as ASCII characters. Certain non-graphic characters appear as C escapes: null=\0, backspace=\b, formfeed=\f, newline=\n, Printed 4/6/89 1
OD(1) COMMAND REFERENCE OD(1) return=\r, tab=\t; others appear as 3-digit octal numbers. Bytes with the parity bit set are displayed in octal. -d Interpret (short) words as unsigned decimal. -f Interpret long words as floating point. -h Interpret (short) words as unsigned hexadecimal. -i Interpret (short) words as signed decimal. -l Interpret long words as signed decimal. -o Interpret (short) words as unsigned octal. -s[n] Look for strings of ascii graphic characters, terminated with a null byte. N specifies the minimum length string to be recognized. By default, the minimum length is 3 characters. -v Show all data. By default, display lines that are identical to the last line shown are not output, but are indicated with an ``*'' in column 1. -w[n] Specifies the number of input bytes to be interpreted and displayed on each output line. If w is not specified, 16 bytes are read for each display line. If n is not specified, it defaults to 32. -x Interpret (short) words as hexadecimal. An upper case format character implies the long or double precision form of the object. EXAMPLES The following invocation of od produces an octal dump in 132 column format, which works nicely if printed on wide printer paper. od -ow frmt RETURN VALUE [NO_ERRS] Command completed without error. [USAGE] Incorrect command line syntax. Execution terminated. Printed 4/6/89 2
OD(1) COMMAND REFERENCE OD(1) [P_ERR] A system error occurred. Execution terminated. See intro(2) for more information on system errors. CAVEATS A hexadecimal offset can't be a block count. It is an historical botch to require specification of object, radix, and sign representation in a single character argument. SEE ALSO adb(1) and sdb(1). Printed 4/6/89 3
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