Date: Sun, 22 Dec 2002 17:30:38 -0600 From: erik@phoenix.smluc.org To: FreeBSD-gnats-submit@FreeBSD.org Subject: bin/46480: patch to allow negative numbers in head Message-ID: <200212222330.gBMNUcR20194@xarx.localdomain>
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>Number: 46480
>Category: bin
>Synopsis: patch to allow negative numbers in head
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Sun Dec 22 15:40:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator: Erik Greenwald
>Release: FreeBSD 5.0-CURRENT i386
>Organization:
>Environment:
System: FreeBSD fenris 5.0-CURRENT FreeBSD 5.0-CURRENT #3: Sun Dec 22 15:57:51 CST 2002 root@fenris:/usr/src/sys/i386/compile/FENRIS i386
>Description:
Patch to allow negative numbers in head. When given a negative number, it
prints all of the file EXCEPT the first N lines. (initiated by irc bs with
larne, rockshox, and hideaway)
>How-To-Repeat:
>Fix:
--- head.patch begins here ---
--- usr.bin/head/head.c.orig Sun Dec 22 16:49:02 2002
+++ usr.bin/head/head.c Sun Dec 22 17:15:43 2002
@@ -83,7 +83,7 @@
break;
case 'n':
linecnt = strtol(optarg, &ep, 10);
- if (*ep || linecnt <= 0)
+ if (*ep || linecnt == 0)
errx(1, "illegal line count -- %s", optarg);
break;
case '?':
@@ -129,11 +129,22 @@
char *cp;
size_t error, readlen;
+ if(cnt>0)
while (cnt && (cp = fgetln(fp, &readlen)) != NULL) {
error = fwrite(cp, sizeof(char), readlen, stdout);
if (error != readlen)
err(1, "stdout");
cnt--;
+ }
+ else {
+ while (++cnt)
+ if (fgetln(fp, &readlen) == NULL)
+ return;
+ while ((cp = fgetln(fp, &readlen)) != NULL) {
+ error = fwrite(cp, sizeof(char), readlen, stdout);
+ if (error != readlen)
+ err(1, "stdout");
+ }
}
}
--- head.patch ends here ---
>Release-Note:
>Audit-Trail:
>Unformatted:
To: FreeBSD-gnats-submit@freebsd.org
From: Erik Greenwald <erik@smluc.org>
Reply-To: Erik Greenwald <erik@smluc.org>
Cc: erik@smluc.org
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