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Annotation of lucent/sys/man/1/tail, revision 1.1.1.1

1.1       root        1: .TH TAIL 1
                      2: .SH NAME
                      3: tail \- deliver the last part of a file
                      4: .SH SYNOPSIS
                      5: .B tail
                      6: [
                      7: .BR +- \fInumber\fP[ lbc ][ rf ]
                      8: ]
                      9: [
                     10: .I file
                     11: ]
                     12: .PP
                     13: .B tail
                     14: [
                     15: .B -fr
                     16: ]
                     17: [
                     18: .B -n
                     19: .I nlines
                     20: ]
                     21: [
                     22: .B -c
                     23: .I ncharacters
                     24: ]
                     25: [
                     26: .I file
                     27: ]
                     28: .SH DESCRIPTION
                     29: .I Tail
                     30: copies the named file to the standard output beginning
                     31: at a designated place.
                     32: If no file is named, the standard input is copied.
                     33: .PP
                     34: Copying begins at position
                     35: .BI + number
                     36: measured from the beginning, or
                     37: .BI - number
                     38: from the end of the input.
                     39: .I Number
                     40: is counted in lines, 1K blocks or characters,
                     41: according to the appended flag
                     42: .LR l ,
                     43: .LR b ,
                     44: or
                     45: .LR c .
                     46: Default is
                     47: .B -10l
                     48: (ten ell).
                     49: .PP
                     50: The further flag
                     51: .L r
                     52: causes tail to print lines from the end of the file in reverse order;
                     53: .L f
                     54: (follow) causes
                     55: .I tail,
                     56: after printing to the end, to keep watch and
                     57: print further data as it appears.
                     58: .PP
                     59: The second syntax is that promulgated by POSIX, where
                     60: the
                     61: .I numbers
                     62: rather than the options are signed.
                     63: .SH EXAMPLES
                     64: .TP
                     65: .B tail file
                     66: Print the last 10 lines of a file.
                     67: .TP
                     68: .B tail +0f file
                     69: Print a file, and continue to watch
                     70: data accumulate as it grows.
                     71: .TP
                     72: .B sed 10q file
                     73: Print the first 10 lines of a file.
                     74: .SH SOURCE
                     75: .B /sys/src/cmd/tail.c
                     76: .SH BUGS
                     77: Tails relative to the end of the file
                     78: are treasured up in a buffer, and thus
                     79: are limited in length.
                     80: .br
                     81: According to custom, option
                     82: .BI + number
                     83: counts lines from 1, and counts
                     84: blocks and characters from 0.

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