From: Ben Gras Date: Thu, 2 Nov 2006 16:51:04 +0000 (+0000) Subject: New sed manpage X-Git-Tag: v3.1.3~149 X-Git-Url: http://zhaoyanbai.com/repos/?a=commitdiff_plain;h=1250e94d56dd20aa21405c6c56e0e9ecc719a1d2;p=minix.git New sed manpage --- diff --git a/man/man1/sed.1 b/man/man1/sed.1 index cc87bbea7..137af30fc 100644 --- a/man/man1/sed.1 +++ b/man/man1/sed.1 @@ -1,80 +1,39 @@ -.TH sed 1 "November 19, 1995" +.TH sed 1 "March 30, 2006" .SH NAME sed \- the stream editor .SH SYNOPSIS -.B sed -.RB [ \-n ] -.RB [ \-g ] -.RB [ \-e -.IR script ] -.RB [ \-f -.IR sfile ] -.RI [ file " ...]" +sed [-n] [-g] [-e script ] [-f sfile ] [ file ] ... .SH DESCRIPTION Sed copies the named files (standard input default) to the standard output, edited according to a script of commands. .P -An -.B \-e -option supplies a single edit command from the next argument; -if there are several of these they are executed in the order in which -they appear. If there is just one -.B \-e -option and no -.BR \-f "'s," -the -.B \-e -flag may be omitted. +An -e option supplies a single edit command from the next argument; +if there are several of these they are executed in the order in which +they appear. If there is just one -e option and no -f 's, the -e flag +may be omitted. .P -An -.B \-f -option causes commands to be taken from the file "sfile"; if -there are several of these they are executed in the order in which -they appear; -.B \-e -and -.B \-f -commands may be mixed. +An -f option causes commands to be taken from the file "sfile"; if +there are several of these they are executed in the order in which +they appear; -e and -f commands may be mixed. .P -The -.B \-g -option causes -.B sed -to act as though every substitute command -in the script has a -.B g -suffix. +The -g option causes sed to act as though every substitute command +in the script has a g suffix. .P -The -.B \-n -option suppresses the default output. +The -n option suppresses the default output. .P A script consists of commands, one per line, of the following form: -.PP + [address [, address] ] function [arguments] -.PP -Normally -.B sed -cyclically copies a line of input into a current text + +Normally sed cyclically copies a line of input into a current text buffer, then applies all commands whose addresses select the buffer in sequence, then copies the buffer to standard output and clears it. .P -The -.B \-n -option suppresses normal output (so that only -.B p -and -.B w -output is done). Also, some commands -.RB ( n , -.BR N ) -do their own line reads, and some others -.RB ( d , -.BR D ) -cause all commands following in the script to be skipped (the -.B D -command also suppresses the clearing of the current text -buffer that would normally occur before the next cycle). +The -n option suppresses normal output (so that only p and w output +is done). Also, some commands (n, N) do their own line reads, and some +others (d, D) cause all commands following in the script to be skipped +(the D command also suppresses the clearing of the current text buffer +that would normally occur before the next cycle). .P It is also helpful to know that there's a second buffer (called the `hold space' that can be copied or appended to or from or swapped with @@ -83,30 +42,27 @@ the current text buffer. An address is: a decimal numeral (which matches the line it numbers where line numbers start at 1 and run cumulatively across files), or a `$' that addresses the last line of input, or a context address, which is a `/regular -expression/', in the style of -.BR ed (1) -modified thus: +expression/', in the style of ed (1) modified thus: .P .TP 5 (1) -The escape sequence `\en' matches a newline embedded in the buffer, -and `\et' matches a tab. +The escape sequence `\\n' matches a newline embedded in the buffer, +and `\\t' matches a tab. .TP 5 (2) A command line with no addresses selects every buffer. .TP 5 (3) -A command line with one address selects every buffer that matches +A command line with one address selects every buffer that matches that address. .TP 5 (4) A command line with two addresses selects the inclusive range from -the first input buffer that matches the first address through the -next input buffer that matches the second. (If the second address -is a number less than or equal to the line number first selected, -only one line is selected.) Once the second address is matched -.B sed -starts looking for the first one again; thus, any number of these +the first input buffer that matches the first address through the +next input buffer that matches the second. (If the second address +is a number less than or equal to the line number first selected, +only one line is selected.) Once the second address is matched sed +starts looking for the first one again; thus, any number of these ranges will be matched. .P The negation operator '!' can prefix a command to apply it to every @@ -115,276 +71,213 @@ line not selected by the address(es). In the following list of functions, the maximum number of addresses permitted for each function is indicated in parentheses. .P -An argument denoted "text" consists of one or more lines, with all -but the last ending with `\e' to hide the newline. +An argument denoted "text" consists of one or more lines, with all +but the last ending with `\' to hide the newline. .P Backslashes in text are treated like backslashes in the replacement -string of an -.B s -command and may be used to protect initial whitespace (blanks and tabs) -against the stripping that is done on every line of the script. +string of an `s' command and may be used to protect initial whitespace +(blanks and tabs) against the stripping that is done on every line of +the script. .P -An argument denoted "rfile" or "wfile" must be last on the command -line. Each wfile is created before processing begins. There can be at +An argument denoted "rfile" or "wfile" must be last on the command +line. Each wfile is created before processing begins. There can be at most 10 distinct wfile arguments. -.ta +\w'nm'u +\w'"command"m'u .TP 5 -a "text" (1) -Append. Place text on output before reading the next input line. +a "text" (1) +Append. Place text on output before reading the next input line. .TP 5 -b "label" (2) +b "label" (2) Branch to the `:' command bearing the label. If no label is given, branch to the end of the script. .TP 5 -c "text" (2) -Change. Delete the current text buffer. With 0 or 1 address, or at +c "text" (2) +Change. Delete the current text buffer. With 0 or 1 address, or at the end of a 2-address range, place text on the output. Start the next cycle. .TP 5 -d (2) -Delete the current text buffer. Start the next cycle. +d (2) +Delete the current text buffer. Start the next cycle. .TP 5 -D (2) +D (2) Delete the first line of the current text buffer (all chars up to the -first newline). Start the next cycle. +first newline). Start the next cycle. .TP 5 -g (2) -Replace the contents of the current text buffer with the contents of +g (2) +Replace the contents of the current text buffer with the contents of the hold space. .TP 5 -G (2) +G (2) Append the contents of the hold space to the current text buffer. .TP 5 -h (2) +h (2) Copy the current text buffer into the hold space. .TP 5 -H (2) +H (2) Append a copy of the current text buffer to the hold space. .TP 5 -i "text" (1) -Insert. Place text on the standard output. -.TP 5 -l (2) -List. Sends the pattern space to standard output. A "w" option may -follow as in the -.B s -command below. Non-printable characters expand to: -.sp .4v -.in +3 -.nf -.ta +\w'xxxn'u +\w'nnnn'u +\w'backspace 'u -\eb \-\- backspace (ASCII 08) -\et \-\- tab (ASCII 09) -\en \-\- newline (ASCII 10) -\er \-\- return (ASCII 13) -\ee \-\- escape (ASCII 27) -\exx \-\- the ASCII character corresponding to 2 hex digits xx. -.fi -.in -3 -.ta +\w'nm'u +\w'"command"m'u -.TP 5 -n (2) -Copy the current text buffer to standard output. Read the next line +i "text" (1) +Insert. Place text on the standard output. +.TP 5 +l (2) +List. Sends the pattern space to standard output. A "w" option may +follow as in the s command below. Non-printable characters expand to: + + \\b -- backspace (ASCII 08) + \\t -- tab (ASCII 09) + \\n -- newline (ASCII 10) + \\r -- return (ASCII 13) + \\e -- escape (ASCII 27) + \\xx -- the ASCII character corresponding to 2 hex digits xx. +.TP 5 +Dump. Hex-dump the pattern space to standard output. +.TP 5 +n (2) +Copy the current text buffer to standard output. Read the next line of input into it. .TP 5 -N (2) +N (2) Append the next line of input to the current text buffer, inserting -an embedded newline between the two. The current line number changes. +an embedded newline between the two. The current line number changes. .TP 5 -p (2) -Print. Copy the current text buffer to the standard output. +p (2) +Print. Copy the current text buffer to the standard output. .TP 5 -P (2) +P (2) Copy the first line of the current text buffer (all chars up to the first newline) to standard output. .TP 5 -q (1) -Quit. Branch to the end of the script. Do not start a new cycle. +q (1) +Quit. Branch to the end of the script. Do not start a new cycle. .TP 5 -r "rfile" (1) -Read the contents of rfile. Place them on the output before reading +r "rfile" (1) +Read the contents of rfile. Place them on the output before reading the next input line. .TP 5 -s /regular-expression/replacement/flags\0\0\0\0\0\0(2) -Substitute the replacement for instances of the regular expression +s /regular expression/replacement/flags (2) +Substitute the replacement for instances of the regular expression in the current text buffer. Any character may be used instead of `/'. For a fuller description see ed (1). Flags is zero or more of the following: -.sp .4v -.ta +\w'gm'u +\w'nnm'u -.in +\w'gmnnm'u -.ti -\w'gmnnm'u -g \-\- Global. Substitute for all nonoverlapping instances of -the string rather than just the first one. -.sp .4v -.ti -\w'gmnnm'u -p \-\- Print the pattern space if a replacement was made. -.sp .4v -.ti -\w'gmnnm'u -w \-\- Write. Append the current text buffer to a file argument -as in a w command if a replacement is made. Standard output is used if no -file argument is given -.in -\w'gmnnm'u -.ta +\w'nm'u +\w'"command"m'u -.TP 5 -t "label" (2) -Branch-if-test. Branch to the -.B : -command with the given label if any + +g -- Global. Substitute for all nonoverlapping instances of the string + rather than just the first one. + +p -- Print the pattern space if a replacement was made. + +w -- Write. Append the current text buffer to a file argument as in a + w command if a replacement is made. Standard output is used if no + file argument is given + +.TP 5 +t "label" (2) +Branch-if-test. Branch to the : command with the given label if any substitutes have been made since the most recent read of an input line -or execution of a -.B t -or -.BR T . -If no label is given, branch to the end of the script. -.TP 5 -T "label" (2) -Branch-on-error. Branch to the -.B : -command with the given label if no substitutes have succeeded since the -last input line or -.B t -or -.B T -command. Branch to the end of the script if no label is given. -.TP 5 -w "wfile" (2) -Write. Append the current text buffer to wfile. -.TP 5 -W "wfile" (2) -Write first line. Append first line of the current text buffer +or execution of a `t'or `T'. If no label is given, branch to the end +of the script. +.TP 5 +T "label" (2) +Branch-on-error. Branch to the : command with the given label if no +substitutes have succeeded since the last input line or t or T command. +Branch to the end of the script if no label is given. +.TP 5 +w "wfile" (2) +Write. Append the current text buffer to wfile . +.TP 5 +W "wfile" (2) +Write first line. Append first line of the current text buffer to wfile. .TP 5 -x (2) +x (2) Exchange the contents of the current text buffer and hold space. .TP 5 -y /string1/string2/\0\0\0\0\0\0(2) -Translate. Replace each occurrence of a character in string1 with -the corresponding character in string2. The lengths of these strings +y /string1/string2/ (2) +Translate. Replace each occurrence of a character in string1 with +the corresponding character in string2. The lengths of these strings must be equal. .TP 5 -! "command" (2) -All-but. Apply the function (or group, if function is -.BR { ) -only to lines not selected by the address(es). +! "command" (2) +All-but. Apply the function (or group, if function is `{') only to +lines not selected by the address(es). .TP 5 -: "label" (0) -This command does nothing but hold a label for -.B b -and -.B t -commands to branch to. +: "label" (0) +This command does nothing but hold a label for `b' and `t' commands +to branch to. .TP 5 -= (1) += (1) Place the current line number on the standard output as a line. .TP 5 -{ (2) +{ (2) Execute the following commands through a matching `}' only when the current line matches the address or address range given. .P An empty command is ignored. .P .SH PORTABILITY -This tool was reverse-engineered from BSD 4.1 UNIX -.BR sed , -and (as far -as the author's knowledge and tests can determine) is compatible with -it. All documented features of BSD 4.1 sed are supported. +This tool was reverse-engineered from BSD 4.1 UNIX sed, and (as far +as the author's knowledge and tests can determine) is compatible with +it. All documented features of BSD 4.1 sed are supported. .P One undocumented feature (a leading 'n' in the first comment having -the same effect as an -.B \-n -command-line option) has been omitted. +the same effect as an -n command-line option) has been omitted. .P The following bugs and limitations have been fixed: .TP 5 -\(bu -There is no hidden length limit (40 in BSD sed) on -.B w -file names. +* +There is no hidden length limit (40 in BSD sed) on w file names. .TP 5 -\(bu +* There is no limit (8 in BSD sed) on the length of labels. .TP 5 -\(bu +* The exchange command now works for long pattern and hold spaces. .P The following enhancements to existing commands have been made: .TP 5 -\(bu -.BR a , -.B i -commands don't insist on a leading backslash-\en in the text. -.TP 5 -\(bu -.BR r , -.B w -commands don't insist on whitespace before the filename. -.TP 5 -\(bu -The -.BR g , -.B p -and -.B P -options on -.B s -commands may be given in any order. +* +a, i commands don't insist on a leading backslash-\\n in the text. +.TP 5 +* +r, w commands don't insist on whitespace before the filename. +.TP 5 +* +The g, p and P options on s commands may be given in any order. .P Some enhancements to regular-expression syntax have been made: .TP 5 -\(bu -\et is recognized in REs (and elsewhere) as an escape for tab. +* +\\t is recognized in REs (and elswhere) as an escape for tab. .TP 5 -\(bu +* In an RE, + calls for 1..n repeats of the previous pattern. .P The following are completely new features: .TP 5 -\(bu -The -.B l -command (list, undocumented and weaker in BSD) +* +The l command (list, undocumented and weaker in BSD) +.TP 5 +The 'L' command (hex dump). .TP 5 -\(bu -The -.B W -command (write first line of pattern space to file). +* +The W command (write first line of pattern space to file). .TP 5 -\(bu -The -.B T -command (branch on last substitute failed). +* +The T command (branch on last substitute failed). .TP 5 -\(bu +* Trailing comments are now allowed on command lines. .P -In addition, -.BR sed "'s" -error messages have been made more specific and informative. -.P -The implementation is also significantly smaller and faster than -BSD 4.1 sed. It uses only the standard I/O library and exit(3). -.P -.SH NOTE -.P -This is a freeware component of the GNU and MINIX operating systems. -The user is hereby granted permission to use, modify, reproduce and -distribute it subject to the following conditions: -.P -1. The authorship notice appearing in each source file may not be -altered or deleted. +In addition, sed's error messages have been made more specific and +informative. .P -2. The object form may not be distributed without source. +The implementation is also significantly smaller and faster than +BSD 4.1 sed. It uses only the standard I/O library and exit(3). .P .SH SEE ALSO .P -.BR cgrep (1), -.BR fgrep (1), -.BR grep (1), -.BR lex (1), -.BR regexp (5), -.BR awk (9). +ed(1), grep(1), awk(1), lex(1), regexp(5) .P .SH AUTHOR -Eric S. Raymond +Eric S. Raymond and Rene Rebe . +This program is distributed under the GPL. + +