I use uniq for some log file analysis and it contained "duplicate"
lines which only differ in lower/upper case (user input). Hence I
added an -i flag which also exists on FreeBSD at least.
Maybe it's useful to add to OpenBSD?
Index: uniq.1
===================================================================
RCS file: /home/ca/OpenBSD/cvs/src/usr.bin/uniq/uniq.1,v
retrieving revision 1.19
diff -u -r1.19 uniq.1
--- uniq.1 24 Oct 2016 13:46:58 -0000 1.19
+++ uniq.1 15 Dec 2017 11:35:53 -0000
@@ -43,6 +43,7 @@
.Nm uniq
.Op Fl c
.Op Fl d | u
+.Op Fl i
.Op Fl f Ar fields
.Op Fl s Ar chars
.Oo
@@ -73,6 +74,8 @@
A field is a string of non-blank characters separated from adjacent fields
by blanks, with blanks considered part of the following field.
Field numbers are one based, i.e., the first field is field one.
+.It Fl i
+Case insensitive comparison of lines.
.It Fl s Ar chars
Ignore the first
.Ar chars
Index: uniq.c
===================================================================
RCS file: /home/ca/OpenBSD/cvs/src/usr.bin/uniq/uniq.c,v
retrieving revision 1.24
diff -u -r1.24 uniq.c
--- uniq.c 19 Dec 2015 10:21:01 -0000 1.24
+++ uniq.c 15 Dec 2017 11:30:46 -0000
@@ -47,7 +47,7 @@
#define MAXLINELEN (8 * 1024)
-int cflag, dflag, uflag;
+int cflag, dflag, uflag, iflag;
int numchars, numfields, repeats;
FILE *file(char *, char *);
@@ -70,7 +70,7 @@
err(1, "pledge");
obsolete(argv);
- while ((ch = getopt(argc, argv, "cdf:s:u")) != -1) {
+ while ((ch = getopt(argc, argv, "cdf:is:u")) != -1) {
const char *errstr;
switch (ch) {
@@ -87,6 +87,9 @@
errx(1, "field skip value is %s: %s",
errstr, optarg);
break;
+ case 'i':
+ iflag = 1;
+ break;
case 's':
numchars = (int)strtonum(optarg, 0, INT_MAX,
&errstr);
@@ -149,7 +152,7 @@
}
/* If different, print; set previous to new value. */
- if (strcmp(t1, t2)) {
+ if ((!iflag && strcmp(t1, t2)) || strcasecmp(t1, t2)) {
show(ofp, prevline);
t1 = prevline;
prevline = thisline;
