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authorJim Meyering <meyering@redhat.com>2007-12-18 11:20:31 +0100
committerJim Meyering <meyering@redhat.com>2007-12-18 11:20:45 +0100
commite19a5aa428f9391bbd58879b27f083c1a835af5a (patch)
treee400b4def6f1b357b7d1dd30efedd4346e0fe7ae
parentd1dba816fb9ce88ba1b941965ca9811ed47080bc (diff)
downloadcoreutils-e19a5aa428f9391bbd58879b27f083c1a835af5a.tar.xz
Note that sorting uniq's input is often useful.
Suggested by Eric Blake.
-rw-r--r--ChangeLog5
-rw-r--r--NEWS4
-rw-r--r--src/uniq.c7
3 files changed, 16 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 83b141087..8d5c1ab84 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2007-12-18 Jim Meyering <meyering@redhat.com>
+
+ * src/uniq.c (usage): Note that sorting uniq's input is often useful.
+ Suggested by Eric Blake.
+
2007-12-15 Jim Meyering <meyering@redhat.com>
Version 6.9.91.
diff --git a/NEWS b/NEWS
index 60be2de8f..5285d51e6 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,9 @@
GNU coreutils NEWS -*- outline -*-
+* Noteworthy changes in release 6.? (????-??-??) [?]
+
+
+
* Noteworthy changes in release 6.9.91 (2007-12-15) [beta]
** Bug fixes
diff --git a/src/uniq.c b/src/uniq.c
index 286452249..5fcbed9a4 100644
--- a/src/uniq.c
+++ b/src/uniq.c
@@ -168,6 +168,13 @@ Mandatory arguments to long options are mandatory for short options too.\n\
A field is a run of whitespace, then non-whitespace characters.\n\
Fields are skipped before chars.\n\
"), stdout);
+ fputs (_("\
+\n\
+Note: while uniq can be useful even with unsorted input, in most applications\n\
+the input is sorted in a manner consistent with field-selection options.\n\
+E.g., use `sort' if `uniq' uses no such option (or simply use `sort -u');\n\
+use `sort -k 3b' with uniq -f2.\n\
+"), stdout);
emit_bug_reporting_address ();
}
exit (status);