src/usr.bin/tail/tail.1 - diff

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Diff for /src/usr.bin/tail/tail.1 between version 1.8 and 1.9

version 1.8, 2000/01/22 02:17:49

version 1.9, 2000/03/11 21:40:04

Line 61

.Pp

The display begins at a byte, line or 512-byte block location in the

input.

Numbers having a leading plus (``+'') sign are relative to the beginning

Numbers having a leading plus

of the input, for example,

.Pq Ql +

.Dq -c +2

sign are relative to the beginning of the input, for example,

.Ic -c +2

starts the display at the second

byte of the input.

Numbers having a leading minus (``-'') sign or no explicit sign are

Numbers having a leading minus

.Pq Ql -

sign or no explicit sign are

relative to the end of the input, for example,

.Dq -n 2

.Ic -n 2

displays the last two lines of the input.

The default starting location is

.Dq -n 10 ,

.Ic -n 10 ,

or the last 10 lines of the input.

.Pp

The options are as follows:

Line 90

Line 93

option causes

.Nm

to not stop when end-of-file is reached, but rather to wait for additional

data to be appended to the input. If the file is replaced (i.e., the

data to be appended to the input.

inode number changes),

If the file is replaced (i.e., the inode number changes),

.Nm

will reopen the file and continue. If the file is truncated,

will reopen the file and continue.

If the file is truncated,

.Nm

will reset its position back to the beginning. This makes

will reset its position back to the beginning.

This makes

.Nm

more useful for watching log files that may get rotated.

The

Line 164

Line 169

.Fl n

options modify the

.Fl r

option, i.e. ``-r -c 4'' displays the last 4 characters of the last line

option, i.e.,

of the input, while the historic tail (using the historic syntax ``-4cr'')

.Ic -r -c 4

displays the last 4 characters of the last line

of the input, while the historic tail (using the historic syntax

.Ic -4cr )

would ignore the

.Fl c

option and display the last 4 lines of the input.