diff options
Diffstat (limited to 'usr.bin/tr/tr.1')
-rw-r--r-- | usr.bin/tr/tr.1 | 56 |
1 files changed, 44 insertions, 12 deletions
diff --git a/usr.bin/tr/tr.1 b/usr.bin/tr/tr.1 index ef39711..fff9ef7 100644 --- a/usr.bin/tr/tr.1 +++ b/usr.bin/tr/tr.1 @@ -209,18 +209,26 @@ Class names are: .\" and vice-versa) is specified in the same relative position in .\" .Ar string1 . .\" .Pp -When ``[:lower:]'' appears in +When +.Dq Li [:lower:] +appears in .Ar string1 -and ``[:upper:]'' appears in the same relative position in +and +.Dq Li [:upper:] +appears in the same relative position in .Ar string2 , it represents the characters pairs from the .Dv toupper mapping in the .Ev LC_CTYPE category of the current locale. -When ``[:upper:]'' appears in +When +.Dq Li [:upper:] +appears in .Ar string1 -and ``[:lower:]'' appears in the same relative position in +and +.Dq Li [:lower:] +appears in the same relative position in .Ar string2 , it represents the characters pairs from the .Dv tolower @@ -326,23 +334,45 @@ and .Ql "A-Z" . .Pp System V has historically implemented character ranges using the syntax -``[c-c]'' instead of the ``c-c'' used by historic +.Dq Li [c-c] +instead of the +.Dq Li c-c +used by historic .Bx implementations and standardized by POSIX. System V shell scripts should work under this implementation as long as the range is intended to map in another range, i.e., the command -``tr [a-z] [A-Z]'' will work as it will map the ``['' character in +.Dq Li "tr [a-z] [A-Z]" +will work as it will map the +.Ql \&[ +character in .Ar string1 -to the ``['' character in +to the +.Ql \&[ +character in .Ar string2 . However, if the shell script is deleting or squeezing characters as in -the command ``tr -d [a-z]'', the characters ``['' and ``]'' will be +the command +.Dq Li "tr -d [a-z]" , +the characters +.Ql \&[ +and +.Ql \&] +will be included in the deletion or compression list which would not have happened under a historic System V implementation. -Additionally, any scripts that depended on the sequence ``a-z'' to -represent the three characters ``a'', ``-'' and ``z'' will have to be -rewritten as ``a\e-z''. +Additionally, any scripts that depended on the sequence +.Dq Li a-z +to +represent the three characters +.Ql a , +.Ql \&- +and +.Ql z +will have to be +rewritten as +.Dq Li a\e-z . .Pp The .Nm @@ -373,7 +403,9 @@ has less characters than .Ar string1 is permitted by POSIX but is not required. Shell scripts attempting to be portable to other POSIX systems should use -the ``[#*]'' convention instead of relying on this behavior. +the +.Dq Li [#*] +convention instead of relying on this behavior. The .Fl u option is an extension to the |