sed


sed - graphics/seda_icon.gif Stream text editor.

 sed(1)                                                               sed(1) NAME      sed - stream text editor SYNOPSIS      sed [-n] script [file ...]      sed [-n] [-e script] ... [-f script_file] ... [file ...] DESCRIPTION      sed copies the named text files (standard input default) to the      standard output, edited according to a script containing up to 100      commands.  Only complete input lines are processed.  Any input text at      the end of a file that is not terminated by a new-line character is      ignored.    Options      sed recognizes the following options:           -f script_file                       Take script from file script_file.           -e script   Edit according to script.  If there is just one -e                       option and no -f options, the flag -e can be omitted.           -n          Suppress the default output.      sed interprets all -escript and -fscript_file arguments in the order      given.  Use caution, if mixing -e and -f options, to avoid      unpredictable or incorrect results.    Command Scripts      A script consists of editor commands, one per line, of the following      form:           [address [, address]] function [arguments]      In normal operation, sed cyclically copies a line of input into a      pattern space (unless there is something left after a D command),      applies in sequence all commands whose addresses select that pattern      space, and, at the end of the script, copies the pattern space to the      standard output (except under -n) and deletes the pattern space.      Some of the commands use a hold space to save all or part of the      pattern space for subsequent retrieval.    Command Addresses      An address is either a decimal number that counts input lines      cumulatively across files, a $ which addresses the last line of input,      or a context address; that is, a /regular expression/ in the style of      ed(1) modified thus:           -  In a context address, the construction \?regular expression?,              where ? is any character, is identical to /regular              expression/.  Note that in the context address \xabc\xdefx,              the second x stands for itself, so that the regular expression              is abcxdef.           -  The escape sequence \n matches a new-line character embedded              in the pattern space.           -  A period (.) matches any character except the terminal new-              line of the pattern space.           -  A command line with no addresses selects every pattern space.           -  A command line with one address selects each pattern space              that matches the address.           -  A command line with two addresses selects the inclusive range              from the first pattern space that matches the first address              through the next pattern space 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).  Thereafter              the process is repeated, looking again for the first address.      sed supports Basic Regular Expression syntax (see regexp(5)).      Editing commands can also be applied to only non-selected pattern      spaces by use of the negation function ! (described below).    Command Functions      In the following list of functions, the maximum number of permissible      addresses for each function is indicated in parentheses.  Other      function elements are interpreted as follows:           text        One or more lines, all but the last of which end with                       \ to hide the new-line.  Backslashes in text are                       treated like backslashes in the replacement string of                       an s command, and can be used to protect initial                       blanks and tabs against the stripping that is done on                       every script line.           rfile       Must terminate the command line, and must be preceded                       by exactly one blank.           wfile       Must terminate the command line, and must be preceded                       by exactly one blank.  Each wfile is created before                       processing begins.  There can be at most 10 distinct                       wfile arguments.      sed recognizes the following functions:      (1)a\      text        Append.  Place text on the output before reading next                  input line.      (2)b label  Branch to the : command bearing label.  If no label is                  specified, branch to the end of the script.      (2)c\      text        Change.  Delete the pattern space.  With 0 or 1 address or                  at the end of a 2-address range, place text on the output.                  Start the next cycle.      (2)d        Delete pattern space and start the next cycle.      (2)D        Delete initial segment of pattern space through first                  new-line and start the next cycle.      (2)g        Replace contents of the pattern space with contents of the                  hold space.      (2)G        Append contents of hold space to the pattern space.      (2)h        Replace contents of the hold space with contents of the                  pattern space.      (2)H        Append the contents of the pattern space to the hold                  space.      (1)i\      text        Insert.  Place text on the standard output.      (2)l        List the pattern space on the standard output in an                  unambiguous form.  Non-printing characters are spelled in                  three-digit octal number format (with a preceding                  backslash), and long lines are folded.      (2)n        Copy the pattern space to the standard output if the                  default output has not been suppressed (by the -n option                  on the command line or the #n command in the script file).                  Replace the pattern space with the next line of input.      (2)N        Append the next line of input to the pattern space with an                  embedded new-line.  (The current line number changes.)      (2)p        Print.  Copy the pattern space to the standard output.      (2)P        Copy the initial segment of the pattern space through the                  first new-line to the standard output.      (1)q        Quit.  Branch to the end of the script.  Do not start a                  new cycle.      (1)r rfile  Read contents of rfile and place on output before reading                  the next input line.      (2)s/regular expression/replacement/flags                  Substitute replacement string for instances of regular                  expression in the pattern space.  Any character can be                  used instead of /.  For a fuller description see ed(1).                  flags is zero or more of:                     n           n=1-2048 (LINE_MAX).  Substitute for just                                 the nth occurrence of regular expression in                                 the pattern space.                     g           Global.  Substitute for all non-overlapping                                 instances of regular expression rather than                                 just the first one.                     p           Print the pattern space if a replacement                                 was made and the default output has been                                 suppressed (by the -n option on the command                                 line or the #n command in the script file).                     w wfile     Write.  Append the pattern space to wfile                                 if a replacement was made.      (2)t label  Test.  Branch to the : command bearing the label if any                  substitutions have been made since the most recent reading                  of an input line or execution of a t.  If label is empty,                  branch to the end of the script.      (2)w wfile  Write.  Append the pattern space to wfile.      (2)x        Exchange the contents of the pattern and hold spaces.      (2)y/string1/string2/                  Transform.  Replace all occurrences of characters in                  string1 with the corresponding character in string2.  The                  lengths of string1 and string2 must be equal.      (2)! function                  Don't.  Apply the function (or group, if function is {)                  only to lines not selected by the address or addresses.      (0): label  This command does nothing; it bears a label for b and t                  commands to branch to.      (1)=        Place the current line number on the standard output as a                  line.      (2){        Execute the following commands through a matching } only                  when the pattern space is selected.  The syntax is:                  { cmd1                  cmd2                  cmd3                   .                   .                   .                  }            (0)         An empty command is ignored.      (0)#        If a # appears as the first character on the first line of                  a script file, that entire line is treated as a comment                  with one exception: If the character after the # is an n,                  the default output is suppressed.  The rest of the line                  after #n is also ignored.  A script file must contain at                  least one non-comment line. EXTERNAL INFLUENCES    Environment Variables      LANG provides a default value for the internationalization variables      that are unset or null. If LANG is unset or null, the default value of      "C" (see lang(5)) is used. If any of the internationalization      variables contains an invalid setting, sed will behave as if all      internationalization variables are set to "C".  See environ(5).      LC_ALL If set to a non-empty string value, overrides the values of all      the other internationalization variables.      LC_CTYPE determines the interpretation of text as single and/or      multi-byte characters, the classification of characters as printable,      and the characters matched by character class expressions in regular      expressions.      LC_MESSAGES determines the locale that should be used to affect the      format and contents of diagnostic messages written to standard error      and informative messages written to standard output.      NLSPATH determines the location of message catalogues for the      processing of LC_MESSAGES.    International Code Set Support      Single- and multi-byte character code sets are supported. EXAMPLES      Make a simple substitution in a file from the command line or from a      shell script, changing abc to xyz:           sed 's/abc/xyz/' file1 >file1.out      Same as above but use shell or environment variables var1 and var2 in      search and replacement strings:           sed "s/$var1/$var2/" file1 >file1.out      or           sed 's/'$var1'/'$var2'/' file1 >file1.out      Multiple substitutions in a single command:           sed -e 's/abc/xyz/' -e 's/lmn/rst/' file1      or           sed -e 's/abc/xyz/' \           -e 's/lmn/rst/' \           file1 >file1.out WARNINGS      sed limits command scripts to a total of not more than 100 commands.      The hold space is limited to 8192 characters.      sed processes only text files.  See the glossary for a definition of      text files and their limitations. AUTHOR      sed was developed by OSF and HP. SEE ALSO      awk(1), ed(1), grep(1), environ(5), lang(5), regexp(5).      sed: A Non-Interactive Streaming Editor tutorial in the Text      Processing Users Guide. STANDARDS CONFORMANCE      sed: SVID2, SVID3, XPG2, XPG3, XPG4, POSIX.2 


HP-UX 11i Systems Administration Handbook and Toolkit
HP-UX 11i Systems Administration Handbook and Toolkit (2nd Edition)
ISBN: 0131018833
EAN: 2147483647
Year: 2003
Pages: 301

flylib.com © 2008-2017.
If you may any questions please contact us: flylib@qtcs.net