Annotation of src/usr.bin/jot/jot.1, Revision 1.1.1.1
1.1 deraadt 1: .\" $NetBSD: jot.1,v 1.2 1994/11/14 20:27:36 jtc Exp $
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34: .\" @(#)jot.1 8.1 (Berkeley) 6/6/93
35: .\"
36: .TH JOT 1 "June 6, 1993"
37: .UC 4
38: .SH NAME
39: jot \- print sequential or random data
40: .SH SYNOPSIS
41: .B jot [
42: options
43: .B ] [
44: \fRreps \fB[\fP begin \fB[\fP end \fB[\fP s \fB] ] ] ]\fP
45: .SH DESCRIPTION
46: .I Jot
47: is used to print out increasing, decreasing, random,
48: or redundant data, usually numbers, one per line.
49: The
50: .I options
51: are understood as follows.
52: .IP \fB\-r\fP
53: Generate random data instead of sequential data, the default.
54: .IP \fB\-b\fP\ word
55: Just print
56: .I word
57: repetitively.
58: .IP \fB\-w\fP\ word
59: Print
60: .IR word
61: with the generated data appended to it.
62: Octal, hexadecimal, exponential, ASCII, zero padded,
63: and right-adjusted representations
64: are possible by using the appropriate
65: .IR printf (3)
66: conversion specification inside
67: .IR word ,
68: in which case the data are inserted rather than appended.
69: .IP \fB\-c\fP
70: This is an abbreviation for \fB\-w %c\fP.
71: .IP \fB\-s\fP\ string
72: Print data separated by
73: .IR string .
74: Normally, newlines separate data.
75: .IP \fB\-n\fP
76: Do not print the final newline normally appended to the output.
77: .IP \fB\-p\fP\ precision
78: Print only as many digits or characters of the data
79: as indicated by the integer
80: .IR precision .
81: In the absence of
82: .BR \-p ,
83: the precision is the greater of the precisions of
84: .I begin
85: and
86: .IR end .
87: The
88: .B \-p
89: option is overridden by whatever appears in a
90: .IR printf (3)
91: conversion following
92: .BR \-w .
93: .PP
94: The last four arguments indicate, respectively,
95: the number of data, the lower bound, the upper bound,
96: and the step size or, for random data, the seed.
97: While at least one of them must appear,
98: any of the other three may be omitted, and
99: will be considered as such if given as
100: .BR \- .
101: Any three of these arguments determines the fourth.
102: If four are specified and the given and computed values of
103: .I reps
104: conflict, the lower value is used.
105: If fewer than three are specified, defaults are assigned
106: left to right, except for
107: .IR s ,
108: which assumes its default unless both
109: .I begin
110: and
111: .I end
112: are given.
113: .PP
114: Defaults for the four arguments are, respectively,
115: 100, 1, 100, and 1, except that when random data are requested,
116: .I s
117: defaults to a seed depending upon the time of day.
118: .I Reps
119: is expected to be an unsigned integer,
120: and if given as zero is taken to be infinite.
121: .I Begin
122: and
123: .I end
124: may be given as real numbers or as characters
125: representing the corresponding value in ASCII.
126: The last argument must be a real number.
127: .PP
128: Random numbers are obtained through
129: .IR random (3).
130: The name
131: .I jot
132: derives in part from
133: .IR iota ,
134: a function in APL.
135: .SH EXAMPLES
136: .de IC
137: .IP
138: .ss 36
139: .ft B
140: ..
141: .de NC
142: .br
143: .ss 12
144: .PP
145: ..
146: .PP
147: The command
148: .IC
149: jot 21 \-1 1.00
150: .NC
151: prints 21 evenly spaced numbers increasing from \-1 to 1.
152: The ASCII character set is generated with
153: .IC
154: jot \-c 128 0
155: .NC
156: and the strings xaa through xaz with
157: .IC
158: jot \-w xa%c 26 a
159: .NC
160: while 20 random 8-letter strings are produced with
161: .IC
162: jot \-r \-c 160 a z | rs \-g 0 8
163: .NC
164: Infinitely many
165: .IR yes 's
166: may be obtained through
167: .IC
168: jot \-b yes 0
169: .NC
170: and thirty
171: .IR ed (1)
172: substitution commands applying to lines 2, 7, 12, etc. is
173: the result of
174: .IC
175: jot \-w %ds/old/new/ 30 2 \- 5
176: .NC
177: The stuttering sequence 9, 9, 8, 8, 7, etc. can be
178: produced by suitable choice of precision and step size,
179: as in
180: .IC
181: jot 0 9 \- \-.5
182: .NC
183: and a file containing exactly 1024 bytes is created with
184: .IC
185: jot \-b x 512 > block
186: .NC
187: Finally, to set tabs four spaces apart starting
188: from column 10 and ending in column 132, use
189: .IC
190: expand \-\`jot \-s, \- 10 132 4\`
191: .NC
192: and to print all lines 80 characters or longer,
193: .IC
194: grep \`jot \-s "" \-b . 80\`
195: .NC
196: .SH SEE ALSO
197: ed(1), expand(1), rs(1), yes(1), printf(3), random(3), expand(1)
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