merge lite-2; also WARNSify the 2 warnings left.
This commit is contained in:
mrg
parent
227b039655
commit
3ac0787450
@ -1,5 +1,5 @@
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# $NetBSD: Makefile,v 1.3 1997/01/09 20:19:48 tls Exp $
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# from: @(#)Makefile 5.3 (Berkeley) 5/11/90
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# $NetBSD: Makefile,v 1.4 1997/10/18 13:15:18 mrg Exp $
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# from: @(#)Makefile 8.1 (Berkeley) 6/6/93
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PROG= head
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@ -1,7 +1,7 @@
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.\" $NetBSD: head.1,v 1.5 1997/01/09 20:19:49 tls Exp $
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.\" $NetBSD: head.1,v 1.6 1997/10/18 13:15:30 mrg Exp $
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.\"
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.\" Copyright (c) 1980, 1990 The Regents of the University of California.
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.\" All rights reserved.
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.\" Copyright (c) 1980, 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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@ -31,27 +31,37 @@
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)head.1 6.6 (Berkeley) 7/24/91
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.\" $NetBSD: head.1,v 1.5 1997/01/09 20:19:49 tls Exp $
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.\" from: @(#)head.1 8.1 (Berkeley) 6/6/93
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.\"
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.Dd July 14, 1993
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.Dt HEAD 1
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.Os
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.Sh NAME
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.Nm head
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.Nd give first few lines
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.Nd display first lines of a file
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.Sh SYNOPSIS
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.Nm head
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.Op Fl n Ar count
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.Op Ar
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.Op Ar file ...
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.Sh DESCRIPTION
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This filter copies the first
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This filter displays the first
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.Ar count
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lines of each of the specified files, or of the standard input.
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lines of each of the specified files, or of the standard input if no
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files are specified.
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If
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.Ar count
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is omitted it defaults to
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10.
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is omitted it defaults to 10.
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.Pp
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If more than a single file is specified, each file is preceded by a
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header consisting of the string
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.Dq ==> XXX <==
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where
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.Dq XXX
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is the name of the file.
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.Pp
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The
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.Nm head
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utility exits 0 on success, and >0 if an error occurs.
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.Sh COMPATIBILITY
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The historic command line syntax of
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.Nm head
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@ -1,8 +1,8 @@
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/* $NetBSD: head.c,v 1.6 1997/01/09 20:19:50 tls Exp $ */
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/* $NetBSD: head.c,v 1.7 1997/10/18 13:15:40 mrg Exp $ */
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/*
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* Copyright (c) 1980, 1987 Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 1980, 1987, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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@ -33,89 +33,127 @@
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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char copyright[] =
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"@(#) Copyright (c) 1980, 1987 Regents of the University of California.\n\
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All rights reserved.\n";
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__COPYRIGHT("@(#) Copyright (c) 1980, 1987, 1992, 1993\n\
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The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
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#ifndef lint
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/*static char sccsid[] = "from: @(#)head.c 5.5 (Berkeley) 6/1/90";*/
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static char rcsid[] = "$NetBSD: head.c,v 1.6 1997/01/09 20:19:50 tls Exp $";
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#if 0
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static char sccsid[] = "@(#)head.c 8.2 (Berkeley) 5/4/95";
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#else
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__RCSID("$NetBSD: head.c,v 1.7 1997/10/18 13:15:40 mrg Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#include <ctype.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <string.h>
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#include <unistd.h>
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static void usage ();
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/*
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* head - give the first few lines of a stream or of each of a set of files
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*
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* Bill Joy UCB August 24, 1977
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*/
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void err __P((int, const char *, ...));
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void head __P((FILE *, int));
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void obsolete __P((char *[]));
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void usage __P((void));
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int main __P((int, char *[]));
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int eval;
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int
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main(argc, argv)
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int argc;
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char **argv;
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char *argv[];
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{
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register int ch, cnt;
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int firsttime, linecnt = 10;
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register int ch;
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FILE *fp;
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int first, linecnt;
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char *ep;
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/* handle obsolete -number syntax */
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if (argc > 1 && argv[1][0] == '-' && isdigit(argv[1][1])) {
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if ((linecnt = atoi(argv[1] + 1)) < 0) {
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usage ();
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}
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argc--; argv++;
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}
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while ((ch = getopt (argc, argv, "n:")) != EOF)
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switch (ch) {
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obsolete(argv);
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linecnt = 10;
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while ((ch = getopt(argc, argv, "n:")) != EOF)
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switch(ch) {
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case 'n':
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if ((linecnt = atoi(optarg)) < 0)
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usage ();
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linecnt = strtol(optarg, &ep, 10);
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if (*ep || linecnt <= 0)
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err(1, "illegal line count -- %s", optarg);
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind, argv += optind;
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argc -= optind;
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argv += optind;
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/* setlinebuf(stdout); */
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for (firsttime = 1; ; firsttime = 0) {
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if (!*argv) {
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if (!firsttime)
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exit(0);
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}
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else {
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if (!freopen(*argv, "r", stdin)) {
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fprintf(stderr, "head: can't read %s.\n", *argv);
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exit(1);
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if (*argv)
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for (first = 1; *argv; ++argv) {
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if ((fp = fopen(*argv, "r")) == NULL) {
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err(0, "%s: %s", *argv, strerror(errno));
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continue;
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}
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if (argc > 1) {
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if (!firsttime)
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putchar('\n');
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printf("==> %s <==\n", *argv);
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(void)printf("%s==> %s <==\n",
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first ? "" : "\n", *argv);
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first = 0;
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}
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++argv;
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head(fp, linecnt);
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(void)fclose(fp);
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}
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for (cnt = linecnt; cnt; --cnt)
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while ((ch = getchar()) != EOF)
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if (putchar(ch) == '\n')
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else
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head(stdin, linecnt);
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exit(eval);
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}
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void
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head(fp, cnt)
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FILE *fp;
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register int cnt;
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{
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register int ch;
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while (cnt--)
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while ((ch = getc(fp)) != EOF) {
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if (putchar(ch) == EOF)
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err(1, "stdout: %s", strerror(errno));
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if (ch == '\n')
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break;
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}
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/*NOTREACHED*/
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}
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static void
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usage ()
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void
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obsolete(argv)
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char *argv[];
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{
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fputs("usage: head [-n line_count] [file ...]\n", stderr);
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char *ap;
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while ((ap = *++argv)) {
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/* Return if "--" or not "-[0-9]*". */
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if (ap[0] != '-' || ap[1] == '-' || !isdigit(ap[1]))
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return;
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if ((ap = malloc(strlen(*argv) + 2)) == NULL)
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err(1, "%s", strerror(errno));
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ap[0] = '-';
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ap[1] = 'n';
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(void)strcpy(ap + 2, *argv + 1);
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*argv = ap;
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}
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}
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void
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usage()
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{
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(void)fputs("usage: head [-n lines] [file ...]\n", stderr);
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exit(1);
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}
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