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Diff for /src/usr.bin/unifdef/unifdef.1 between version 1.7 and 1.8

version 1.7, 2000/03/06 03:17:40 version 1.8, 2000/03/11 21:40:06
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 .Ar ...  .Ar ...
 .Op Ar file  .Op Ar file
 .Sh DESCRIPTION  .Sh DESCRIPTION
 .Nm unifdef  .Nm
 is useful for removing ifdef'ed lines  is useful for removing ifdef'ed lines
 from a file while otherwise leaving the file alone.  from a file while otherwise leaving the file alone.
 .Nm unifdef  .Nm
 acts on  acts on
 #ifdef, #ifndef, #else, and #endif lines,  #ifdef, #ifndef, #else, and #endif lines,
 and it knows only enough about C  and it knows only enough about C
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 to the end of a line and finds no backslash for continuation.  to the end of a line and finds no backslash for continuation.
 .Pp  .Pp
 The options are as follows:  The options are as follows:
 .Bl -tag -width Ds -compact  .Bl -tag -width Ds
 .It Fl D Ns Ar sym  .It Xo Fl D Ns Ar sym ,
 .It Fl U Ns Ar sym  .Fl U Ns Ar sym
   .Xc
 Specify which symbols to define or undefine,  Specify which symbols to define or undefine,
 and the lines inside those ifdefs will be copied to the output or removed as  and the lines inside those ifdefs will be copied to the output or removed as
 appropriate.  appropriate.
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 .Ar sym  .Ar sym
 will also be removed.  will also be removed.
 ifdefs involving symbols you don't specify  ifdefs involving symbols you don't specify
 and ``#if'' control lines  and
 are untouched and copied out  .Dq #if
   control lines are untouched and copied out
 along with their associated  along with their associated
 ifdef, else, and endif lines.  ifdef, else, and endif lines.
 If an ifdef X occurs nested inside another ifdef X, then the  If an ifdef X occurs nested inside another ifdef X, then the
 inside ifdef is treated as if it were an unrecognized symbol.  inside ifdef is treated as if it were an unrecognized symbol.
 If the same symbol appears in more than one argument,  If the same symbol appears in more than one argument,
 the last occurrence dominates.  the last occurrence dominates.
 .Pp  
 .It Fl c  .It Fl c
 If the  If the
 .Fl c  .Fl c
 flag is specified,  flag is specified,
 then the operation of  then the operation of
 .Nm unifdef  .Nm
 is complemented,  is complemented,
 i.e. the lines that would have been removed or blanked  i.e., the lines that would have been removed or blanked
 are retained and vice versa.  are retained and vice versa.
 .Pp  
 .It Fl l  .It Fl l
 Replace removed lines with blank lines  Replace removed lines with blank lines
 instead of deleting them.  instead of deleting them.
 .Pp  
 .It Fl t  .It Fl t
 Disables parsing for C comments and quotes, which is useful  Disables parsing for C comments and quotes, which is useful
 for plain text.  for plain text.
 .Pp  .It Xo Fl iD Ns Ar sym ,
 .It Fl iD Ns Ar sym  .Fl iU Ns Ar sym
 .It Fl iU Ns Ar sym  .Xc
 Ignore ifdefs.  Ignore ifdefs.
 If your C code uses ifdefs to delimit non-C lines,  If your C code uses ifdefs to delimit non-C lines,
 such as comments  such as comments
 or code which is under construction,  or code which is under construction,
 then you must tell  then you must tell
 .Nm unifdef  .Nm
 which symbols are used for that purpose so that it won't try to parse  which symbols are used for that purpose so that it won't try to parse
 for quotes and comments  for quotes and comments
 inside those ifdefs.  inside those ifdefs.
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 above.  above.
 .El  .El
 .Pp  .Pp
 .Nm unifdef  .Nm
 copies its output to  copies its output to
 .Em stdout  .Em stdout
 and will take its input from  and will take its input from
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 .Ar file  .Ar file
 argument is given.  argument is given.
 .Pp  .Pp
 .Nm unifdef  .Nm
 works nicely with the  works nicely with the
 .Fl D Ns Ar sym  .Fl D Ns Ar sym
 option added to  option added to
 .Xr diff 1  .Xr diff 1
 as of the 4.1 Berkeley Software Distribution.  as of the 4.1 Berkeley Software Distribution.
 .Sh SEE ALSO  
 .Xr diff 1  
 .Sh DIAGNOSTICS  .Sh DIAGNOSTICS
 Inappropriate else or endif.  Inappropriate else or endif.
 .br  .br
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 with line numbers of the unterminated #ifdefs.  with line numbers of the unterminated #ifdefs.
 .Pp  .Pp
 Exit status is 0 if output is exact copy of input, 1 if not, 2 if trouble.  Exit status is 0 if output is exact copy of input, 1 if not, 2 if trouble.
   .Sh SEE ALSO
   .Xr diff 1
 .Sh HISTORY  .Sh HISTORY
 The  The
 .Nm  .Nm
 command appeared in  command appeared in
 .Bx 4.3 .  .Bx 4.3 .
 .Sh BUGS  .Sh BUGS
 Should try to deal with ``#if'' lines.  Should try to deal with
   .Dq #if
   lines.
 .Pp  .Pp
 Doesn't work correctly if input contains null characters.  Doesn't work correctly if input contains null characters.
Legend:
Removed from v.1.7  
changed lines
  Added in v.1.8