commit 5f06185b1b187993248b737c29dff9ded3996fa9
parent 5836ef72e3f899fe8ceaccb89116f869484c3e28
Author: sin <sin@2f30.org>
Date: Wed, 11 Feb 2015 12:12:21 +0000
uniq: Fixup program usage and manpage
Remove -i as it is not required by POSIX. We'll add it if we
hit scripts that require it.
Diffstat:
3 files changed, 14 insertions(+), 21 deletions(-)
diff --git a/README b/README
@@ -79,7 +79,7 @@ The following tools are implemented ('*' == finished, '#' == UTF-8 support,
=* tty yes none
=* uname yes none
#* unexpand yes none
-= uniq no none
+= uniq no [infile [outfile]]
=* unlink yes none
= uudecode no -o
= uuencode no -m
diff --git a/uniq.1 b/uniq.1
@@ -6,7 +6,10 @@
.Nd report or filter out repeated lines in a file
.Sh SYNOPSIS
.Nm
-.Op Fl cdu
+.Op Fl c
+.Op Fl d | u
+.Op Fl f Ar fields
+.Op Fl s Ar chars
.Op Ar file
.Sh DESCRIPTION
.Nm
@@ -26,20 +29,12 @@ Prefixes each line with a count of its consecutive occurrences in the input.
Suppresses non-duplicate lines (thus 'uniq -d' prints only duplicates).
.It Fl u
Suppresses non-unique lines (thus 'uniq -u' prints only uniques).
+.It Fl f Ar fields
+Ignore the first
+.Ar fields
+in each input line when doing comparisons.
+.It Fl s Ar chars
+Ignore the first
+.Ar chars
+characters in each input line when doing comparisons.
.El
-.Sh BUGS
-The original sbase implementation of
-.Nm
-supported multiple input-file arguments as e.g.
-.Xr cat 1
-and
-.Xr grep 1
-do.
-Unfortunately, POSIX uniq treats its second argument (if present) as an
-output filename and clobbers it. Since users and scripts which rely on
-.Nm
-supporting multiple input-file arguments would be at risk of data loss
-if they ever ran into a POSIX-compatible
-.Nm
-, support for multiple input-file arguments was removed from this
-implementation.
diff --git a/uniq.c b/uniq.c
@@ -25,7 +25,7 @@ static long prevlinecount = 0;
static void
usage(void)
{
- eprintf("usage: %s [-cdiu] [input]]\n", argv0);
+ eprintf("usage: %s [-cdufs] [file]\n", argv0);
}
int
@@ -34,8 +34,6 @@ main(int argc, char *argv[])
FILE *fp;
ARGBEGIN {
- case 'i':
- eprintf("not implemented\n");
case 'c':
countfmt = "%7ld ";
break;
