UNGET(1)                   POSIX Programmer's Manual                  UNGET(1)



PPRROOLLOOGG
       This manual page is part of the POSIX Programmer's Manual.  The OS
       implementation of this interface may differ (consult the corresponding
       OS manual page for details of OS behavior), or the interface may not be
       implemented on OS.

NNAAMMEE
       unget -- undo a previous get of an SCCS file (DDEEVVEELLOOPPMMEENNTT)

SSYYNNOOPPSSIISS
       unget [[-ns]] [[-r _S_I_D]] _f_i_l_e...

DDEESSCCRRIIPPTTIIOONN
       The _u_n_g_e_t utility shall reverse the effect of a _g_e_t --ee done prior to
       creating the intended new delta.

OOPPTTIIOONNSS
       The _u_n_g_e_t utility shall conform to the Base Definitions volume of
       POSIX.1-2017, _S_e_c_t_i_o_n _1_2_._2, _U_t_i_l_i_t_y _S_y_n_t_a_x _G_u_i_d_e_l_i_n_e_s.

       The following options shall be supported:

       --rr _S_I_D    Uniquely identify which delta is no longer intended. (This
                 would have been specified by _g_e_t as the new delta.) The use
                 of this option is necessary only if two or more outstanding
                 _g_e_t commands for editing on the same SCCS file were done by
                 the same person (login name).

       --ss        Suppress the writing to standard output of the intended
                 delta's SID.

       --nn        Retain the file that was obtained by _g_e_t, which would
                 normally be removed from the current directory.

OOPPEERRAANNDDSS
       The following operands shall be supported:

       _f_i_l_e      A pathname of an existing SCCS file or a directory. If _f_i_l_e
                 is a directory, the _u_n_g_e_t utility shall behave as though each
                 file in the directory were specified as a named file, except
                 that non-SCCS files (last component of the pathname does not
                 begin with ss..)  and unreadable files shall be silently
                 ignored.

                 If exactly one _f_i_l_e operand appears, and it is ''--'', the
                 standard input shall be read; each line of the standard input
                 shall be taken to be the name of an SCCS file to be
                 processed. Non-SCCS files and unreadable files shall be
                 silently ignored.

SSTTDDIINN
       The standard input shall be a text file used only when the _f_i_l_e operand
       is specified as ''--''.  Each line of the text file shall be interpreted
       as an SCCS pathname.

IINNPPUUTT FFIILLEESS
       Any SCCS files processed shall be files of an unspecified format.

EENNVVIIRROONNMMEENNTT VVAARRIIAABBLLEESS
       The following environment variables shall affect the execution of
       _u_n_g_e_t:

       _L_A_N_G      Provide a default value for the internationalization
                 variables that are unset or null. (See the Base Definitions
                 volume of POSIX.1-2017, _S_e_c_t_i_o_n _8_._2, _I_n_t_e_r_n_a_t_i_o_n_a_l_i_z_a_t_i_o_n
                 _V_a_r_i_a_b_l_e_s for the precedence of internationalization
                 variables used to determine the values of locale categories.)

       _L_C___A_L_L    If set to a non-empty string value, override the values of
                 all the other internationalization variables.

       _L_C___C_T_Y_P_E  Determine the locale for the interpretation of sequences of
                 bytes of text data as characters (for example, single-byte as
                 opposed to multi-byte characters in arguments and input
                 files).

       _L_C___M_E_S_S_A_G_E_S
                 Determine the locale that should be used to affect the format
                 and contents of diagnostic messages written to standard
                 error.

       _N_L_S_P_A_T_H   Determine the location of message catalogs for the processing
                 of _L_C___M_E_S_S_A_G_E_S.

AASSYYNNCCHHRROONNOOUUSS EEVVEENNTTSS
       Default.

SSTTDDOOUUTT
       The standard output shall consist of a line for each file, in the
       following format:


           "%s\n", <_S_I_D _r_e_m_o_v_e_d _f_r_o_m _f_i_l_e>

       If there is more than one named file or if a directory or standard
       input is named, each pathname shall be written before each of the
       preceding lines:


           "\n%s:\n", <_p_a_t_h_n_a_m_e>

SSTTDDEERRRR
       The standard error shall be used only for diagnostic messages.

OOUUTTPPUUTT FFIILLEESS
       Any SCCS files updated shall be files of an unspecified format.  During
       processing of a _f_i_l_e, a locking _z_-_f_i_l_e, as described in _g_e_t, and a _q_-
       _f_i_l_e (a working copy of the _p_-_f_i_l_e), may be created and deleted. The _p_-
       _f_i_l_e and _g_-_f_i_l_e, as described in _g_e_t, shall be deleted.

EEXXTTEENNDDEEDD DDEESSCCRRIIPPTTIIOONN
       None.

EEXXIITT SSTTAATTUUSS
       The following exit values shall be returned:

        0    Successful completion.

       >0    An error occurred.

CCOONNSSEEQQUUEENNCCEESS OOFF EERRRROORRSS
       Default.

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       None.

EEXXAAMMPPLLEESS
       None.

RRAATTIIOONNAALLEE
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _d_e_l_t_a, _g_e_t, _s_a_c_t

       The Base Definitions volume of POSIX.1-2017, _C_h_a_p_t_e_r _8, _E_n_v_i_r_o_n_m_e_n_t
       _V_a_r_i_a_b_l_e_s, _S_e_c_t_i_o_n _1_2_._2, _U_t_i_l_i_t_y _S_y_n_t_a_x _G_u_i_d_e_l_i_n_e_s

CCOOPPYYRRIIGGHHTT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1-2017, Standard for Information Technology --
       Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  In the event of any discrepancy between this version and the
       original IEEE and The Open Group Standard, the original IEEE and The
       Open Group Standard is the referee document. The original Standard can
       be obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page are
       most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .



IEEE/The Open Group                  2017                             UNGET(1)
