> Why are there 2 separate binaries for /usr/bin/sort > and > /usr/xpg4/bin/sort? From looking at it the only > difference is option > -c. > sort(1) says: > /usr/bin/sort > -c Checks that the single input file is ordered > as speci- > fied by the arguments and the collating > sequence of > the current locale. The exit code is set > and no output > is produced unless the file is out of sort. > pg4/bin/sort > -c Same as /usr/bin/sort except no > output is > produced under any circumstances. > problem? I thought error messages are > notaninterface? Or is this the exception of the > common rule?
The code in question is at http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/cmd/sort/common/check.c#203 which looks like it enables messages for the non-xpg4 in the case of either -c or -c -u options. http://www.opengroup.org/onlinepubs/9699919799/utilities/sort.html shows something new: -c for error messages and -C (capital C) same but with no error messages: >-c > Check that the single input file is ordered as specified by the arguments >and the collating sequence of the current locale. Output shall not be sent >to standard output. The exit code shall indicate whether or not disorder >was detected or an error occurred. If disorder (or, with -u, a duplicate key) >is detected, a warning message shall be sent to standard error indicating >where the disorder or duplicate key was found. >-C > Same as -c, except that a warning message shall not be sent to standard >error if disorder or, with -u, a duplicate key is detected. As far as I can tell, the current code does not implement the -C (capital C) option. The availability of both those options would comply with the latest standard, AFAIK, and would resolve the difference between /usr/bin/sort and /usr/xpg4/bin/sort (by allowing both behaviors by command line option, and with the existing /usr/bin/sort behavior effectively the default (i.e. if one uses -c rather than the new -C). That's my take, anyway... -- This message posted from opensolaris.org _______________________________________________ shell-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/shell-discuss
