


      SSSSEEEEDDDD((((1111))))                      ((((UUUUNNNNIIIIXXXX 5555....0000))))                     SSSSEEEEDDDD((((1111))))



      NNNNAAAAMMMMEEEE
           sed - stream editor

      SSSSYYYYNNNNTTTTAAAAXXXX
           sssseeeedddd [ ----nnnn ] [ ----eeee script ] [ ----ffff sfile ] [ files ]

      DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
           _S_e_d copies the named _f_i_l_e_s (standard input default) to the
           standard output, edited according to a script of commands.
           The ----ffff option causes the script to be taken from file _s_f_i_l_e;
           these options accumulate.  If there is just one ----eeee option
           and no ----ffff options, the flag ----eeee may be omitted.  The ----nnnn
           option suppresses the default output.  A script consists of
           editing commands, one per line, of the following form:

                [ address [ , address ] ] function [ arguments ]

           In normal operation, _s_e_d cyclically copies a line of input
           into a _p_a_t_t_e_r_n _s_p_a_c_e (unless there is something left after a
           DDDD command), applies in sequence all commands whose _a_d_d_r_e_s_s_e_s
           select that pattern space, and at the end of the script
           copies the pattern space to the standard output (except
           under ----nnnn) and deletes the pattern space.

           Some of the commands use a _h_o_l_d _s_p_a_c_e to save all or part of
           the _p_a_t_t_e_r_n _s_p_a_c_e for subsequent retrieval.

           An _a_d_d_r_e_s_s is either a decimal number that counts input
           lines cumulatively across files, a $$$$ that addresses the last
           line of input, or a context address, i.e., a ////_r_e_g_u_l_a_r
           _e_x_p_r_e_s_s_i_o_n//// in the style of _e_d(1) modified thus:

                In a context address, the construction \\\\?_r_e_g_u_l_a_r
                     _e_x_p_r_e_s_s_i_o_n?, where ?  is any character, is
                     identical to ////_r_e_g_u_l_a_r _e_x_p_r_e_s_s_i_o_n////.  Note that in
                     the context address \\\\xxxxaaaabbbbcccc\\\\xxxxddddeeeeffffxxxx, the second xxxx
                     stands for itself, so that the regular expression
                     is aaaabbbbccccxxxxddddeeeeffff.
                The escape sequence \\\\nnnn matches a new-line _e_m_b_e_d_d_e_d in
                     the pattern space.
                A period .... matches any character except the _t_e_r_m_i_n_a_l
                     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



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      SSSSEEEEDDDD((((1111))))                      ((((UUUUNNNNIIIIXXXX 5555....0000))))                     SSSSEEEEDDDD((((1111))))



                     selected.)Thereafter the process is repeated,
                     looking again for the first address.

           Editing commands can be applied only to non-selected pattern
           spaces by use of the negation function !!!! (below).

           In the list that follows, the maximum allowable number of
           addresses for each function is indicated in parentheses.

           The _t_e_x_t argument consists of 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 ssss command, and may be used to protect initial
           blanks and tabs against the stripping that is done on every
           script line.  The _r_f_i_l_e or _w_f_i_l_e argument must terminate the
           command line and must be preceded by exactly one blank.
           Each _w_f_i_l_e is created before processing begins.  There can
           be at most 10 distinct _w_f_i_l_e arguments.

           (1)aaaa\\\\
           _t_e_x_t      Append.  Place _t_e_x_t on the output before reading
                     the next input line.
           (2)bbbb _l_a_b_e_l
                     Branch to the :::: command bearing the _l_a_b_e_l.  If
                     _l_a_b_e_l is empty, branch to end of script.
           (2)cccc\\\\
           _t_e_x_t      Change.  Delete the pattern space.  With 0 or 1
                     address or at the end of a 2-address range, place
                     _t_e_x_t on the output.  Start the next cycle.
           (2)dddd      Delete the pattern space.  Start the next cycle.
           (2)DDDD      Delete the initial segment of the pattern space
                     through the first new-line.  Start the next cycle.
           (2)gggg      Replace the contents of the pattern space by the
                     contents of the hold space.
           (2)GGGG      Append the contents of the hold space to the
                     pattern space.
           (2)hhhh      Replace the contents of the hold space by the
                     contents of the pattern space.
           (2)HHHH      Append the contents of the pattern space to the
                     hold space.
           (1)iiii\\\\
           _t_e_x_t      Insert.  Place _t_e_x_t on the standard output.
           (2)llll      List the pattern space on the standard output in
                     an unambiguous form.  Non-printing characters are
                     spelled in two-digit ASCII; long lines are folded.
           (2)nnnn      Copy the pattern space to the standard output.
                     Replace pattern space with next input line.
           (2)NNNN      Append the next line of input to the pattern space
                     with an embedded new-line.  (The current line
                     number changes.)
           (2)pppp      Print.  Copy pattern space to standard output.
           (2)PPPP      Copy the initial segment of the pattern space



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      SSSSEEEEDDDD((((1111))))                      ((((UUUUNNNNIIIIXXXX 5555....0000))))                     SSSSEEEEDDDD((((1111))))



                     through the first new-line to the standard output.
           (1)qqqq      Quit.  Branch to the end of the script.  Do not
                     start a new cycle.
           (2)rrrr _r_f_i_l_e
                     Read the contents of _r_f_i_l_e.  Place them on the
                     output before reading the next input line.
           (2)ssss/_r_e_g_u_l_a_r _e_x_p_r_e_s_s_i_o_n/_r_e_p_l_a_c_e_m_e_n_t/_f_l_a_g_s
                     Substitute the _r_e_p_l_a_c_e_m_e_n_t string for instances of
                     the _r_e_g_u_l_a_r _e_x_p_r_e_s_s_i_o_n in the pattern space.  Any
                     character may be used instead of ////.  For a fuller
                     description see _e_d(1).  _F_l_a_g_s is zero or more of:
                          gggg    Global.  Substitute for all
                               nonoverlapping instances of the _r_e_g_u_l_a_r
                               _e_x_p_r_e_s_s_i_o_n rather than just the first
                               one.
                          pppp    Print the pattern space if a replacement
                               was made.
                          wwww _w_f_i_l_e
                               Write.  Append the pattern space to
                               _w_f_i_l_e if a replacement was made.
           (2)tttt _l_a_b_e_l
                     Test.  Branch to the :::: command bearing the _l_a_b_e_l
                     if any substitutions have been made since the most
                     recent reading of an input line or execution of a
                     tttt.  If _l_a_b_e_l is empty, branch to end of script.
           (2)wwww _w_f_i_l_e
                     Write.  Append the pattern space to _w_f_i_l_e.
           (2)xxxx      Exchange the contents of pattern and hold spaces.
           (2)yyyy/_s_t_r_i_n_g_1/_s_t_r_i_n_g_2/
                     Transform.  Replace all occurrences of characters
                     in _s_t_r_i_n_g_1 with the corresponding character in
                     _s_t_r_i_n_g_2.  The lengths of _s_t_r_i_n_g_1 and _s_t_r_i_n_g_2 must
                     be equal.
           (2)!!!! _f_u_n_c_t_i_o_n
                     Don't.  Apply the _f_u_n_c_t_i_o_n (or group, if _f_u_n_c_t_i_o_n
                     is {{{{) only to lines _n_o_t selected by the
                     address(es).
           (0):::: _l_a_b_e_l
                     This command does nothing; it bears a _l_a_b_e_l for bbbb
                     and tttt 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.
           (0)       An empty command is ignored.

      SSSSEEEEEEEE AAAALLLLSSSSOOOO
           awk(1), ed(1), grep(1).







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