From cfa37a7b1131abbab2e7d339b451f5f0e3198cc8 Mon Sep 17 00:00:00 2001 From: rsc Date: Sat, 10 Apr 2004 18:53:55 +0000 Subject: Lots of man pages. --- man/man1/sort.1 | 260 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 260 insertions(+) create mode 100644 man/man1/sort.1 (limited to 'man/man1/sort.1') diff --git a/man/man1/sort.1 b/man/man1/sort.1 new file mode 100644 index 00000000..6dded61a --- /dev/null +++ b/man/man1/sort.1 @@ -0,0 +1,260 @@ +.TH SORT 1 +.SH NAME +sort \- sort and/or merge files +.SH SYNOPSIS +.B sort +[ +.BI -cmuMbdf\&inrwt x +] +[ +.BI + pos1 +[ +.BI - pos2 +] ... +] ... +[ +.B -k +.I pos1 +[ +.I ,pos2 +] +] ... +[ +.B -o +.I output +] +[ +.B -T +.I dir +\&... +] +[ +.I option +\&... +] +[ +.I file +\&... +] +.SH DESCRIPTION +.I Sort\^ +sorts +lines of all the +.I files +together and writes the result on +the standard output. +If no input files are named, the standard input is sorted. +.PP +The default sort key is an entire line. +Default ordering is +lexicographic by runes. +The ordering is affected globally by the following options, +one or more of which may appear. +.TP +.B -M +Compare as months. +The first three +non-white space characters +of the field +are folded +to upper case +and compared +so that +.L JAN +precedes +.LR FEB , +etc. +Invalid fields +compare low to +.LR JAN . +.TP +.B -b +Ignore leading white space (spaces and tabs) in field comparisons. +.TP +.B -d +`Phone directory' order: +only letters, +accented letters, +digits and white space +are significant in comparisons. +.TP +.B -f +Fold lower case +letters onto upper case. +Accented characters are folded to their +non-accented upper case form. +.TP +.B -i +Ignore characters outside the +.SM ASCII +range 040-0176 +in non-numeric comparisons. +.TP +.B -w +Like +.BR -i , +but ignore only tabs and spaces. +.TP +.B -n +An initial numeric string, +consisting of optional white space, +optional plus or minus sign, +and zero or more digits with optional decimal point, +is sorted by arithmetic value. +.TP +.B -g +Numbers, like +.B -n +but with optional +.BR e -style +exponents, are sorted by value. +.TP +.B -r +Reverse the sense of comparisons. +.TP +.BI -t x\^ +`Tab character' separating fields is +.IR x . +.PP +The notation +.BI + "pos1\| " - pos2\^ +restricts a sort key to a field beginning at +.I pos1\^ +and ending just before +.IR pos2 . +.I Pos1\^ +and +.I pos2\^ +each have the form +.IB m . n\f1, +optionally followed by one or more of the flags +.BR Mbdfginr , +where +.I m\^ +tells a number of fields to skip from the beginning of the line and +.I n\^ +tells a number of characters to skip further. +If any flags are present they override all the global +ordering options for this key. +A missing +.BI \&. n\^ +means +.BR \&.0 ; +a missing +.BI - pos2\^ +means the end of the line. +Under the +.BI -t x\^ +option, fields are strings separated by +.IR x ; +otherwise fields are +non-empty strings separated by white space. +White space before a field +is part of the field, except under option +.BR -b . +A +.B b +flag may be attached independently to +.IR pos1 +and +.IR pos2. +.PP +The notation +.B -k +.IR pos1 [, pos2 ] +is how POSIX +.I sort +defines fields: +.I pos1 +and +.I pos2 +have the same format but different meanings. +The value of +.I m\^ +is origin 1 instead of origin 0 +and a missing +.BI \&. n\^ +in +.I pos2 +is the end of the field. +.PP +When there are multiple sort keys, later keys +are compared only after all earlier keys +compare equal. +Lines that otherwise compare equal are ordered +with all bytes significant. +.PP +These option arguments are also understood: +.TP \w'\fL-z\fIrecsize\fLXX'u +.B -c +Check that the single input file is sorted according to the ordering rules; +give no output unless the file is out of sort. +.TP +.B -m +Merge; assume the input files are already sorted. +.TP +.B -u +Suppress all but one in each +set of equal lines. +Ignored bytes +and bytes outside keys +do not participate in +this comparison. +.TP +.B -o +The next argument is the name of an output file +to use instead of the standard output. +This file may be the same as one of the inputs. +.TP +.BI -T dir +Put temporary files in +.I dir +rather than in +.BR /tmp . +.ne 4 +.SH EXAMPLES +.TP +.L sort -u +0f +0 list +Print in alphabetical order all the unique spellings +in a list of words +where capitalized words differ from uncapitalized. +.TP +.L sort -t: +1 /adm/users +Print the users file +sorted by user name +(the second colon-separated field). +.TP +.L sort -umM dates +Print the first instance of each month in an already sorted file. +Options +.B -um +with just one input file make the choice of a +unique representative from a set of equal lines predictable. +.TP +.L +grep -n '^' input | sort -t: +1f +0n | sed 's/[0-9]*://' +A stable sort: input lines that compare equal will +come out in their original order. +.SH FILES +.BI /tmp/sort. . +.SH SOURCE +.B /sys/src/cmd/sort.c +.SH SEE ALSO +.IR uniq (1), +.IR look (1) +.SH DIAGNOSTICS +.I Sort +comments and exits with non-null status for various trouble +conditions and for disorder discovered under option +.BR -c . +.SH BUGS +An external null character can be confused +with an internally generated end-of-field character. +The result can make a sub-field not sort +less than a longer field. +.PP +Some of the options, e.g. +.B -i +and +.BR -M , +are hopelessly provincial. -- cgit v1.2.3