Add mandoc-manpage for cut(1) and clean up code
and mark it as finished in README.
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README
2
README
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@ -21,7 +21,7 @@ The following tools are implemented (* == finished):
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* comm yes none
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* comm yes none
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cp no -H, -i, -L
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cp no -H, -i, -L
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* cron non-posix none
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* cron non-posix none
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cut yes none
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* cut yes none
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date yes none
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date yes none
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dirname yes none
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dirname yes none
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du no -H, -L, -x
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du no -H, -L, -x
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126
cut.1
126
cut.1
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@ -1,60 +1,70 @@
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.TH CUT 1 sbase\-VERSION
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.Dd January 18, 2015
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.SH NAME
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.Dt CUT 1 sbase\-VERSION
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cut \- extract columns of data
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.Sh NAME
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.SH SYNOPSIS
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.Nm cut
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.B cut \-b
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.Nd extract columns of data
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.I list
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.Sh SYNOPSIS
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.RB [ \-n ]
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.Nm cut
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.RI [ file ...]
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.Fl b Ar list
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.br
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.Op Fl n
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.B cut \-c
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.Op Ar file ...
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.I list
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.Nm cut
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.RI [ file ...]
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.Fl c Ar list
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.br
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.Op Ar file ...
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.B cut \-f
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.Nm cut
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.I list
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.Fl f Ar list
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.RB [ \-d
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.Op Fl d Ar delim
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.IR delim ]
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.Op Fl s
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.RB [ \-s ]
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.Op Ar file ...
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.RI [ file ...]
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.Sh DESCRIPTION
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.SH DESCRIPTION
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.Nm
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.B cut
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out bytes, characters or delimited fields from each line of
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out bytes, characters, or delimited fields from each line of the given
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.Ar file
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files and write to stdout. With no file, or when file is `-', cut reads
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and write to stdout.
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from stdin.
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.Pp
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.P
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If no
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.I list
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.Ar file
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is a comma or space separated list of numbers and ranges where numbering
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is given or
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starts from 1. Ranges are on the form `N-M'. If N or M is missing, the
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.Ar file
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beginning or end of line is assumed. Numbers and ranges may be repeated,
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is '-',
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overlapping, and in any order. Selected input is written in the same
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.Nm
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order that it is read, and is written exactly once.
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reads from stdin.
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.SH OPTIONS
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.Pp
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.TP
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.Ar list
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.BI \-b \ list
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is a comma or space separated list of numbers and ranges starting
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The
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from 1. Ranges have the form 'N-M'. If N or M is missing,
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.I list
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beginning or end of line is assumed. Numbers and ranges
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specifies byte positions.
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may be repeated, overlapping and in any order.
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.TP
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.Pp
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.BI \-c \ list
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Selected input is written in the same order it is read
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The
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and is written exactly once.
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.I list
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.Sh OPTIONS
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specifies character positions.
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.Bl -tag -width Ds
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.TP
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.It Fl b Ar list | Fl c Ar list
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.BI \-d \ delim
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.Ar list
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specifies byte | character positions.
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.It Fl n
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Do not split multibyte characters. A character is written when its
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last byte is selected.
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.It Fl f Ar list
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.Ar list
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specifies field numbers. Lines not containing field
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delimiters are passed through, unless
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.Fl s
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is specified.
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.It Fl d Ar delim
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Use first byte of
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Use first byte of
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.I delim
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.Ar delim
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as field delimiter, instead of tab.
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as field delimiter. Default is \et.
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.TP
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.It Fl s
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.BI \-f \ list
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The
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.I list
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specifies field numbers. Lines not containing field delimiters are
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passed through untouched.
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.TP
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.B \-n
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Do not split characters. A character is output if its last byte is
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selected.
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.TP
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.B \-s
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Suppress lines not containing field delimiters.
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Suppress lines not containing field delimiters.
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.El
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.Sh STANDARDS
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The
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.Nm
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utility is compliant with the
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.St -p1003.1-2008
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specification.
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.Pp
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The possibility of separating numbers and ranges with a space
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is an extension to that specification.
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24
cut.c
24
cut.c
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@ -6,14 +6,6 @@
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#include "text.h"
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#include "text.h"
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#include "util.h"
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#include "util.h"
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static void
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usage(void)
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{
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eprintf("usage: cut -b list [-n] [file...]\n"
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" cut -c list [file...]\n"
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" cut -f list [-d delim] [-s] [file...]\n");
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}
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typedef struct Range {
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typedef struct Range {
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size_t min, max;
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size_t min, max;
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struct Range *next;
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struct Range *next;
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@ -135,6 +127,14 @@ cut(FILE *fp)
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}
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}
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}
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}
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static void
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usage(void)
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{
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eprintf("usage: cut -b list [-n] [file ...]\n"
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" cut -c list [file ...]\n"
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" cut -f list [-d delim] [-s] [file ...]\n");
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}
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int
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int
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main(int argc, char *argv[])
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main(int argc, char *argv[])
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{
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{
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@ -163,12 +163,12 @@ main(int argc, char *argv[])
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if (!mode)
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if (!mode)
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usage();
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usage();
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if (!argc) {
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if (!argc)
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cut(stdin);
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cut(stdin);
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} else for (; argc--; argv++) {
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else for (; argc--; argv++) {
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if (!strcmp(*argv, "-")) {
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if (!strcmp(*argv, "-"))
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cut(stdin);
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cut(stdin);
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} else {
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else {
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if (!(fp = fopen(*argv, "r"))) {
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if (!(fp = fopen(*argv, "r"))) {
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weprintf("fopen %s:", *argv);
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weprintf("fopen %s:", *argv);
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continue;
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continue;
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